Page 1 EP1080 SERVICE MANUAL...
Page 2 EP1080 GENERAL, MECHANICAL/ ELECTRICAL...
Page 3: Table Of Contents
CONTENTS GENERAL 1. SPECIFICATIONS ........G-1 2.
Page 4 CONTENTS 8. CLEANING UNIT ........M-23 8-1.
Page 5 CONTENTS 17-7. Paper Separating Mechanism......M-62 17-8. Paper Take-Up Roll ....... . M-63 18.
Page 6 CONTENTS 33. PC DRIVE MOTOR M1 MALFUNCTION ....M-94 34. MISFEED DETECTION ........M-95...
Page 7 GENERAL...
Page 8: Specifications
(250 sheets of paper) Manual Bypass Table EXPOSURE SYSTEM : Mirror Scanning, Slit Exposure DEVELOPING SYSTEM : Minolta New Micro-Toning System CHARGING SYSTEM : Comb Electrode DC Negative Corona with Scorotron System IMAGE TRANSFER : Visible Image Transfer by means of a Single-Wire DC...
Page 9 MULTIPLE COPIES : 1 to 99 WARMING-UP TIME : 60 sec. or less with room temperature of 20°C and rated power voltage : A4C or 8-1/2" × 11"C: 7.5 sec. or less FIRST COPY TIME (in Full size Mode using 1st Drawer) CONTINUOUS COPY SPEED (copies/min.): Fed from 1st Drawer Zoom Ratio Zoom Ratio...
Page 10 POWER/CURRENT CONSUMPTION (Copier Only) Fusing Max. Exposure Max. Power Heater Current Voltage Lamp Consumption In Standby Lamp Consumption (Rating) (Rating) 1220 W 935 W 115 V 115/200 V 10.5 A 120 V 900 W 80 V 1270 W 966 W 225 W 127 V 127 V...
Page 11: Space Requirements
SPACE REQUIREMENTS To ensure easy copier operation, supply replacement, and service maintenance, adhere to the recommended space requirements detailed below. Be sure to allow a clearance of 150 (6") mm. or more at the back of the copier as there is a ventilation duct. 1,609 mm (63-1/4") 230 mm 1,336 mm (52-1/2")
Page 12: Precautions For Installation
PRECAUTIONS FOR INSTALLATION Installation Site To ensure safety and utmost performance of the copier, the copier should NOT be used in a place: Where it will be subject to extremely high or low temperature or humidity. Which is exposed to direct sunlight. Which is in the direct air stream of an air conditioner, heater or ventilator.
Page 13: Precautions For Use
PRECAUTIONS FOR USE To ensure that the copier is used in an optimum condition, observe the following precautions. Never place a heavy object on the copier or subject the copier to shocks. Insert the power plug all the way into the outlet. Do not attempt to remove any panel or cover which is secured while the copier is making copies.
Page 14: Handling Of The Consumables
HANDLING OF THE CONSUMABLES Before using any consumables, always read the label on its container carefully. Use the right toner. The applicable copier model name is indicated on the Toner Bottle. Paper is apt to be easily damaged by dampness. To prevent absorption of moisture, store paper, which has been removed from its wrapper but not loaded into the Drawer, in a sealed plastic bag in a cool, dark place.
Page 15: System Options
SYSTEM OPTIONS 1139O0170A 1139O1212A 1139O0030A 1139O0180A 1139O1222A 1. Duplexing Document Feeder AFR-7 2. Automatic Document Feeder AF-3 3. Multi Bypass Table MB-1 4. Paper Feed Cabinet PF-201 5. Duplex Unit AD-3 6. 10-Bin Sorter S-104 7. Staple Sorter ST-101 8. Paper Feed Cabinet PF-101 (*1) 9.
Page 16: Parts Identification
PARTS IDENTIFICATION Control Panel Original Cover Power Switch Manual Bypass Table (Accessory) Right Door Copy Tray Front Door 1st Drawer 2nd Drawer...
Page 17 Original Pad Original Width/Length Scale Original Glass Toner Bottle Holder Toner Bottle Lock Release Lever Corona Unit Cleaning Lever (Upper/Lower) Upper Half of Copier Imaging Unit Imaging Unit Lock Release Lever Fusing Unit Dehumidifier Switch Fusing Unit Lock Release Lever G-10...
Page 18: Control Panel Keys And Indicators
CONTROL PANEL KEYS AND INDICATORS 8-1. Basic Panel Meter Auto Manual Mixed Orig. Det. Energy Saving Count Size Staple 50%~200% Sort 2in1 Margin Auto Toner Auto Interrupt 2in1 Sort & Staple Auto Drum Cover Full Size Dehumidify Book Start FLS. Lighter Darker Group...
Page 19 Start Key : Starts a copy cycle and a Tech. Rep. Mode operation. Paper Select Key : Selects the desired paper size, or the Auto Paper or Manual Mode. Enlargement Key : Selects a desired fixed enlargement ratio. Full Size Key : Selects full size (100%).
Page 20: System Panel
8-2. System Panel Meter Auto Manual Mixed Orig. Det. Count Size Staple 2in1 Sort Margin Toner 2in1 Sort & Staple Cover Drum Dehumidify Book Group Book Memory Input Finishing Orig. Copy 1139O2372A Auto Size Mode Key : Selects the Auto Size Mode. Manual Staple Key : Staples copy sets or stacks already made.
Page 21: Display Panel
8-3. Display Panel 50%~200% Auto Auto Auto Full Size FLS. Lighter Darker Inch 1139O4572A 1139O4572A Monitor Display : Consists of the Paper Port Indicators, which show the Drawer currently selected for use, the Closure Failure Indicator, which indicates that a Door is left open, the Misfeed Indicators, which indicate that a paper misfeed has occurred (with the location of the misfeed being shown in...
Page 22: Mechanical/Electrical
MECHANICAL/ ELECTRICAL...
Page 23 CONTENTS GENERAL 1. SPECIFICATIONS ........G-1 2.
Page 24 CONTENTS 8. CLEANING UNIT ........M-23 8-1.
Page 25 CONTENTS 17-7. Paper Separating Mechanism......M-62 17-8. Paper Take-Up Roll ....... . M-63 18.
Page 26 CONTENTS 33. PC DRIVE MOTOR M1 MALFUNCTION ....M-94 34. MISFEED DETECTION ........M-95...
Page 27: Cross-Sectional View
CROSS-SECTIONAL VIEW 3rd Mirror 17. Image Transfer/Paper 2nd Mirror Separator Coronas 1st Mirror 18. Suction Unit Exposure Lamp LA1 19. Oil Roller Lamp Reflector 20. Upper/Lower Fusing Roller Lens 21. Paper Exit Roller Cleaning Blade 22. Exit/Duplex Switching Guide PC Drum Charge Corona (for optional Duplex Unit AD-3 Unexposed Areas/Edge Erase and Sorter S-104 &...
Page 28: Copy Process
COPY PROCESS MANUAL BYPASS TABLE 1. PC DRUM 8. PAPER SEPARATION 2. DRUM CHARGING 9. CLEANING 3. UNEXPOSED AREAS/EDGE ERASE 10. MAIN ERASE 4. EXPOSURE 11. TRANSPORT 5. DEVELOPING 12. FUSING 6. PAPER FEEDING 13. PAPER EXIT 7. IMAGE TRANSFER 1.
Page 29 6. Paper Feeding Paper is fed either automatically from the 1st or 2nd Drawer, or manually via the Manual Bypass Table. Each Drawer has fingers that function to separate the top sheet of paper from the rest at take-up. (For more details, see p. M-56.) 7.
Page 30: Drive System
DRIVE SYSTEM This copier is equipped with two main drive motors, PC Drive Motor M1 that drives the upper half of the copier (Imaging Unit) and Main Drive Motor M2 which gives drive for the lower half of the copier (paper take-up/feeding and transport mechanism and Fusing Unit).
Page 31: Sequential Explanation
SEQUENTIAL EXPLANATION *Numbers given in rectangles in the following flowchart are timer values in msec. A The power cord is plugged into the outlet. Power cord is plugged in. DC24V for Drum heating (PU2) Drum Dehumidifying Only when Paper Heater H2 Dehumidifying Switch S3 is ON Paper Dehumidifying Heater H3...
Page 32 C The Fusing Unit temperature reaches 200°C. Fusing Thermistor TH1 detects 200°C. ON/OFF Fusing Heater Lamp H1 The Fusing Unit temperature control is started.
Page 33 D The Start Key is pressed. Start Key ON PC Drive Motor M1 Main Erase Lamp LA2 Main Drive Motor M2 Unexposed Areas/Edge Erase Lamp LA3 All LEDs are turned ON. Developing Bias (High Voltage Unit HV1) Paper Separator Corona (HV1) Cleaning Bias (HV1) Some models have no Bias Seal installed depending on their marketing areas.
Page 34 Approx. Scanner Motor M5 Scanner Reference Position Sensor PC81 Approx. Unexposed Areas/Edge Erase Lamp LA3 LEDs ON/OFF control is started. Approx. Synchronizing Roller Clutch Approx. Separator Fingers (Separator Solenoid SL1) Approx. F A scan motion is completed. SCEND signal: LOW Approx.
Page 35 G The last paper moves past Transport Roller Sensor PC51. PC51 OFF Approx. Transport Roller (Paper Transport Clutch CL2) Approx. Paper Leading Edge Detecting Sensor PC54 Approx. Synchronizing Roller (Synchronizing Roller Clutch CL1) Approx. PC Drum Charge Corona/Image Transfer Corona (High Voltage Unit HV1) Approx.
Page 36: Pc Drum
PC DRUM The photoconductive drum used in this copier is the organic photoconductor (OPC) type. The drum is made up of two distinct, semiconductive materials on an aluminum alloy base. The outer of the two layers is called the Charge Transport Layer (CTL), while the inner layer is called the Charge Generating Layer (CGL).
Page 37: Imaging Unit
IMAGING UNIT This copier is equipped with an Imaging Unit, or IU, which integrates a PC Drum, PC Drum Charge Corona, Developing Unit, Cleaning Unit, and Toner Recycling mechanism into one assembly. The Unit also includes the Upper Synchronizing Roller which facilitates clearing of a paper misfeed. PC Drum Coupled to Gear Corona Unit Cleaning...
Page 38: Imaging Unit Drive
6-1. Imaging Unit Drive Drive for the Imaging Unit is transmitted by one of the gears on the Unit. This particular gear is in mesh with the Imaging Unit Drive Gear in the copier. Developer Mixing Screw Drive Gear Bucket Roller Drive Gear Imaging Unit Drive Sleeve/Magnet Roller Gear (in Copier)
Page 39: Toner Recycling
6-2. Toner Recycling The copier is provided with a toner recycling mechanism. The toner, which has been scraped off the surface of the PC Drum by the Cleaning Blade and collected in the Cleaning Unit, is conveyed by the two Toner Recycling Coils to the Toner Supply Port and, from there, it is returned back to the Developer Mixing Chamber of the Developing Unit.
Page 40: I/U Counter Cnt2
6-3. I/U Counter CNT2 The Imaging Unit is fitted with a mechanical counter. Called I/U Counter CNT2, it keeps track of the number of copy cycles the Imaging Unit has been subjected to. CNT2 counts up when it receives a Count Up signal from Main Control Board PWB-A.
Page 41: I/U Fuse F4
6-4. I/U Fuse F4 The Imaging Unit is provided with a fuse called I/U Fuse F4. When a new Imaging Unit is installed in the copier and the Power Switch turned ON, an I/U Set signal is output causing the copier to start the starter setup sequence and ATDC Sensor automatic adjustment.
Page 42: Development
DEVELOPMENT The Developing Unit built into the Imaging Unit performs the following functions: • Mixes the toner and carrier well to ensure that a sufficient amount of toner is positively charged. • Detects the toner-to-carrier ratio of the developer by means of the ATDC Sensor and replenishes the supply of toner as necessary.
Page 43: Atdc Sensor
7-1. ATDC Sensor ATDC Sensor UN3 installed on the underside of the Developer Mixing Chamber detects the varying toner-to-carrier ratio of the developer which flows over it in the Chamber. The copier CPU compares the detected ratio with the ratio set by the ATDC Detection Level Mode (Tech. Rep. Choice SCH-90) to control toner replenishment.
Page 44 Toner Empty Detection The copier has no toner empty detecting sensor and, instead, the ATDC Sensor performs that function. The ATDC Sensor checks the toner-to-carrier ratio and, if it reads a T/C ratio lower than the setting 37 copies and, further, if it next reads a ratio 1% lower than the setting, this is a toner-empty condition.
Page 45: Magnet Roller
7-2. Magnet Roller The Magnet Roller of the Sleeve/Magnet Roller of this copier has the following magnetic characteristics. Part of pole S2 before the principal N1 pole (i.e., the area marked as S2b in the Fig. below) provides a very weak magnetic force.
Page 46: Developing Bias
7-3. Developing Bias A negative voltage (Vb = Developing Bias voltage) is applied to the Sleeve Roller to prevent a foggy background on the copy. The amount of toner attracted onto the surface of the PC Drum depends on how much lower the PC Drum surface potential (Vi) is than Vb (i.e., the potential difference).
Page 47: Doctor Blade
7-4. Doctor Blade The Doctor Blade installed over the Sleeve/Magnet Roller regulates the height of the developer brush on the surface of the Sleeve Roller. The Blade is perpendicular to the direction of movement of the Magnet Roller to minimize variations in the distance between the Doctor Blade and Magnet Roller as the Magnet Roller moves.
Page 48: Atdc Sensor Failure
7-6. ATDC SENSOR FAILURE A defective ATDC Sensor (C0F30) is detected under any of the following timings: The ATDC Sensor output remains 0.5V or lower for a consecutive 2-second period during a period from 2 seconds after the Imaging Unit has been energized until it is deenergized.
Page 49: Cleaning Unit
CLEANING UNIT 8-1. Cleaning Unit The Cleaning Blade is pressed tightly against the surface of the PC Drum and scrapes off any toner remaining on the surface after image transfer and paper separation have been completed. The Cleaning Blade is moved back and forth to prevent the PC Drum from deteriorating and the Cleaning Blade from warping away from the surface of the PC Drum.
Page 50: Cleaning Bias
8-2. Cleaning Bias Except the U.S.A., Canada, and Europe There is a Cleaning Bias Seal installed to minimize damage to the PC Drum from acid paper. Toner Antispill Mylar PC Drum Cleaning Bias Seal 1139C04MAA M-24...
Page 51: Toner Hopper
TONER HOPPER 9-1. Toner Hopper Locking/Unlocking The Toner Hopper is not integrated into the Imaging Unit; instead, it is secured to the copier. To replace an empty Toner Bottle, the user first needs to swing the Toner Bottle Holder out 40° to the front. The Holder pivots about the Toner Supply Port as it is swung out or in, which effectively prevents toner from spilling when the Holder is swung out or in.
Page 52: Shutter
9-3. Shutter The connection between the Toner Hopper and Imaging Unit is provided with a Shutter which prevents toner from spilling when the Imaging Unit is slid out of the copier. Imaging Unit Out of Copier Imaging Unit in Position in Copier Shutter Imaging Unit 9-4.
Page 53: Toner Bottle Vibration
9-5. Toner Bottle Vibration When the indentations at three places on the left-hand side (as viewed when the Toner Bottle is in position) of the Toner Bottle move past the protrusion in the Toner Bottle Holder, the Toner Bottle is vibrated to prevent some of the toner from remaining unconsumed in the Bottle.
Page 54: Toner Replenishing Control
9-6. Toner Replenishing Control 1. The ATDC Sensor installed in the Imaging Unit reads the toner-to-carrier ratio of the developer in the Developer Mixing Chamber for each copy cycle. 2. It samples the ratio 16 times and compares each with the preset level. 3.
Page 55: Toner Replenishing Motor M8 Malfunction
9-7. Toner Replenishing Motor M8 Malfunction A defective Toner Replenishing Motor M8 is detected under any of the following timings: C0070: M8’s Failure to Turn The output from Toner Hopper Home Position Sensor PC112 does not go HIGH within 2 seconds after M8 has 2sec PC112 been energized.
Page 56: Drum Charging
DRUM CHARGING The PC Drum Charge Corona above the Imaging Unit deposits a negative DC charge evenly across the surface of the PC Drum. The Corona Unit has a Comb Electrode which minimizes the amount of ozone produced. The conventional wire type corona unit produces a large amount of ozone due to corona discharge in radial directions.
Page 57: Unexposed Areas/Edge Erase Lamp
UNEXPOSED AREAS/EDGE ERASE LAMP To prevent a black band from occurring across both the leading and trailing edges, and along the front and rear edges, of the electrostatic latent image, 31 LEDs of Unexposed Areas/Edge Erase Lamp LA3 are turned ON before development takes place, thereby reducing to a minimum the unnecessary potential on the surface of the PC Drum.
Page 58 The 31 LEDs of LA3 are grouped as shown below. The diagram on the bottom of this page shows which LEDs turn ON and OFF for different paper sizes and different zoom ratios. LED Group No. LED No. LED Group No. LED No.
Page 59 PC Drive Motor M1 Image Leading Edge SCEND Approx. 260msec. Approx. 260msec. Unexposed Areas/Erase Lamp LA3 All LEDS ON ON/OFF Control All LEDS ON 1139T53MCA 1139C12MAA M-33...
Page 60: Optical Section
OPTICAL SECTION As the Scanner is moved by Scanner Motor M5, the light from Exposure Lamp LA1 is reflected off the original and guided through the four Mirrors onto the surface of the PC Drum to form the electrostatic latent image. The image is enlarged or reduced as necessary by changing the position of the Lens and 4th Mirror and varying the angle of the 4th Mirror.
Page 61: Exposure Lamp La1
12-1. Exposure Lamp LA1 An AC halogen lamp is used as Exposure Lamp LA1. As the exposure level is adjusted on the control panel, the duty ratio of the pulse of AVR Remote from PWB-A changes to increase or decrease the LA1 voltage, thereby changing the image density.
Page 62: Ae Sensor
12-2. AE Sensor In the Auto Exposure Mode, the AE Sensor on AE Sensor Board PWB-H measures the intensity of the light reflected off the original, which results in the black/white ratio of a 210-mm-wide area from the reference position of the original being measured.
Page 63: Exposure Lamp La1
12-3. Lamp Reflectors The Main Reflector ensures that light from Exposure Lamp LA1 exposes all areas of the original. The Auxiliary Reflector functions to reflect light onto the areas that LA1 cannot illuminate when an original that does not lie flat on the Original Glass (such as a book) is being used.
Page 64: Scanner And 2Nd/3Rd Mirror Carriage Movement
12-5. Scanner and 2nd/3rd Mirror Carriage Movement The Scanner and 2nd/3rd Mirrors Carriage are moved by the Scanner Drive Cable fitted in the rear side of the copier. The Cable is driven by Scanner Motor M5. Both the Scanner and 2nd/3rd Mirrors Carriage slide along the Scanner Shaft at the rear end.
Page 65 The Scanner starts the scan motion as a Scan Sel signal (PJ1-3) is output from PWB-A. At the start of a scan motion and other heavy load conditions, Scanner Motor M5 requires a large amount of current. The Current 1 or 2 signal (PJ1-10 or 11) from PWB-A is selected accordingly to vary the amount of current supplied to M5.
Page 66: 4Th Mirror Movement
12-6. 4th Mirror Movement The 4th Mirror is moved to vary the conjugate distance for a particular zoom ratio by driving the rack-and-pinion gears at the front and rear ends of the copier using Mirror Motor M7 (stepping motor). The Levers of the Holder to which the Mirror is mounted slides along a tilted rail to change the Mirror angle.
Page 67 1139C16MAA M-41...
Page 68: Lens Movement
12-7. Lens Movement The Lens is moved by the Lens Drive Cable to which drive comes from Lens Motor M6 (stepping motor). The motor drive pulses (PJ4E-1 to 4) sent from PWB-E drive M6 to move the Lens a given distance, corresponding to the zoom ratio, from the reference position determined by Lens Reference Position Sensor PC90.
Page 69 1139C17MAA...
Page 70: Optical Section Malfunction
12-8. OPTICAL SECTION MALFUNCTION A defective Exposure Lamp LA1 (C0400, C0410) is detected under any of the following timings: C0400: Exposure Lamp’s Failure to Turn ON The output from AE Sensor Board PWB-H does not drop to 4.3V or lower for the period from when LA1 turns ON Image Leading Edge and the Scanners start a scan motion to...
Page 71 A defective Lens Motor M6 (C0610) is detected under any of the following timings: The output from Lens Reference Position Sensor PC90 does not go LOW within approx. 15 seconds after M6 has been about 15sec energized while the PC90 output was PC80 1139T24MCA HIGH.
Page 72: Original Size Detecting Sensors
ORIGINAL SIZE DETECTING SENSORS 13-1. Original Size Detecting Sensors The Original Size Detecting Sensors are mounted only on the copiers for the following marketing areas. The number and location of these sensors vary depending on the marketing area. Area J: Japan Area H: Hong Kong Area O: ROC, South Africa, Singapore, Malaysia, Indonesia, Saudi Arabia, Area O:...
Page 73 Each sensor has two LEDs and one photo receiver. When the Original Cover is raised, the photo receiver detects light from the two LEDs reflected off the original to determine whether there is an original placed on the Original Glass. The combination in which the sensors are activated and deactivated determines the size of the original, as checked by Original Size Detecting Board UN2.
Page 74 1139C06MAA M-48...
Page 75: Original Size Detection Failure
13-2. Original Size Detection Failure An original size detection failure (C0F02, C0FE1 to C0FFF) is detected under any of the following timings. C0F02: Original Size Detection Error 1) In F7 operation a) The Busy signal does not go LOW within approx. 800 msec. after the Initial signal has gone LOW.
Page 76: Main Erase Lamp
MAIN ERASE LAMP Main Erase Lamp LA2 is turned ON to neutralize any surface potential remaining on the surface of the PC Drum after cleaning. Mounting Bracket Main Erase Lamp LA2 PC Drum Slit LA2 consists of ten tungsten-filament lamps mounted on a Board. Slit Copier Front Frame...
Page 77 Start Key Main Errase Lamp LA2 PC Drum Charge Corona Approx. 740msec. 1139T57MCA 1139C18MAA M-51...
Page 78: Image Transfer And Paper Separation
IMAGE TRANSFER AND PAPER SEPARATION Image Transfer The Image Transfer Corona applies a DC negative corona emission to the underside of the paper thereby attracting the positively charged toner onto the surface of the paper to form a visible, developed image of the original. The Corona Unit is provided with a Corona Wire cleaning mechanism: the operator has only to pull out the Lever on which the Cleaner is mounted from the front of the copier, which cleans the Wire.
Page 79 Start Key Paper Loading Edge Detecting Sensor PC54 Image Transfer Corona Approx. 200 msec. Paper Separator Corona Approx. 700 msec. 1139T58MCA 1139C19MAA M-53...
Page 80: Paper Separator Fingers
PAPER SEPARATOR FINGERS After image transfer, an AC corona emission is applied to the underside of the paper by the Paper Separator Corona to neutralize the paper so that it can be easily separated from the PC Drum. To further ensure that the paper is positively separated from the PC Drum, there are two Paper Separator Fingers attached to the Imaging Unit.
Page 81 Synchronizing Roller Clutch CL1 Approx. 470 msec. Scparator Soenoid Sl1 Approx. 200 1139T59MCA msec. 1139C27MAA M-55...
Page 82: Paper Take-Up/Feed Section
PAPER TAKE-UP/FEED SECTION The copier is equipped with two Paper Drawers, 1st and 2nd, that can be slid to the front out of the copier. Each can hold up to 250 sheets of paper. The 1st Drawer is a universal paper size type, while the 2nd Drawer is a fixed paper size type.
Page 83: Edge Guide And Trailing Edge Stop
17-1. Edge Guide and Trailing Edge Stop 1st Drawer The 1st Drawer is a universal type allowing the user to slide freely the Edge Guide and Trailing Edge Stop (in 1 mm units) to accommodate paper of different sizes. The Edge Guide and Trailing Edge Stop can be locked into position by meshing the notches in the Lock Lever with those in the Drawer.
Page 84: Drawer Positioning
17-2. Drawer Positioning Each of the 1st and 2nd Drawers is positioned by fitting its Positioning Plate on the paper take-up end into the groove in the Drawer Frame. It is then secured in position by the magnet installed in the Drawer Front Cover on the paper take-up end.
Page 85: Drawer-In-Position Detection
17-4. Drawer-in-Position Detection The copier detects that the Drawer is slid into position as follows. 1st Drawer When the 1st Drawer is slid into the copier, the Drawer Frame presses 1st Drawer Set Detecting Switch S65 installed on the back panel of the copier. 2nd Drawer When the 2nd Drawer is slid into the copier, the Rib on the Drawer Frame blocks 2nd Drawer Set Sensor PC69.
Page 86: Paper Size Detection
17-5. Paper Size Detection The 1st Drawer has a Lever on its bottom that presses all or some of the three Paper Size Detecting Switches (S61, S62, and S63) according to the paper size. The copier will know the current paper size by the combination in which these switches are turned ON and OFF.
Page 87: Paper Empty Detection
17-6. Paper Empty Detection When the Drawer runs out of paper, the Actuator for the Paper Empty Sensor drops into the cutout in the Paper Lifting Plate. This activates the Paper Empty Sensor and the copier will know that the Drawer has run out of paper.
Page 88: Paper Separating Mechanism
17-7. Paper Separating Mechanism Each Drawer has Fingers that function to separate the top sheet of paper from the rest of the paper stack at paper take-up. The Fingers are fitted to the right front and rear corners of the Drawer. When the Paper Take-Up Roll starts turning to take up the top sheet of paper, its turning force is directly transmitted to the top sheet of paper as it is in direct contact with the Paper Take-Up Roll.
Page 89: Paper Take-Up Roll
17-8. Paper Take-Up Roll Since the Paper Lifting Plate is raised at all times by the Paper Lifting Springs, paper is wedged in the mechanism when the Drawer is slid out of the copier if the Paper Take-Up Roll is round in shape. So the Take-Up Roll is semicircular and the circular part of the Roll is positioned on top at times other than take-up.
Page 90 Start Key Approx. 300msec. Approx. 100msec. 1st/2nd Drawer Paper Take-up Solenoid SL2/3 1st Sheet of Paper 2nd Sheet of Paper 1st/2nd Drawer Paper Take-up Approx. 400msec. Sensor PC55/56 1139T60MCA 1139C23MAA M-64...
Page 91: Vertical Paper Transport
VERTICAL PAPER TRANSPORT The sheet of paper taken up by the Paper Take-Up Roll from the Drawer is fed along the Paper Guide onto the Vertical Transport Rollers. The paper fed by the Vertical Transport Rollers reaches the Transport Rollers and is then fed up to the Synchronizing Rollers. The Transport Rollers are turned and stopped by Paper Transport Clutch CL2.
Page 92 TRON TRON Start Key Approx. 200msec. Approx. 250msec. Paper Transport Clutch CL2 Approx. 230msec. Approx. 230msec. Paper Leading Edge Detecting Sensor PC54 Transport Roller Sensor PC51 1st Sheet of Paper Last Sheet of Paper 1139T61MCA 1139C24MAA M-66...
Page 93: Synchronizing Rollers
SYNCHRONIZING ROLLERS The Synchronizing Rollers, operating in phase with the Scanners’ scan motion and paper feeding, synchronize the leading edge of the copy paper accurately with the leading edge of the toner image on the PC Drum. The Upper Synchronizing Roller is a metal roller covered with a polyvinyl chloride tubing, while the Lower one is a rubber roller.
Page 94: Upper Synchronizing Roller Positioning
19-1. Upper Synchronizing Roller Positioning Since the Upper Synchronizing Roller is fitted to the Imaging Unit, it must be correctly positioned with reference to the Lower Synchronizing Roller when the Upper Half of the copier is swung down into the locked position. For this purpose, slits are cut in the lower copier frame and the Bushings of the Upper Synchronizing Roller are to fit into these slits.
Page 95: Synchronizing Roller Drive
19-3. Synchronizing Roller Drive The Synchronizing Rollers are started as Synchronizing Roller Clutch CL1 is energized upon reception of a signal from PWB-A. Start Key Approx. 130msec. Approx. 380msec. Approx. 130msec. Approx. 380msec. Synchronizing Roller Clutch CL1 Approx. 500msec. Paper Leading Edge Detecting Sensor PC54 SCEND 1139T62MCA 1139C21MAA...
Page 96: Paper Transport
PAPER TRANSPORT After having gone through the image transfer and paper separation processes, the paper is then transported to the Fusing Unit by the Suction Belts of the Suction Deck driven directly by Main Drive Motor M2. Suction Fan Motor M4 draws the paper onto the turning Suction Belts for positive transport of the paper.
Page 97: Fusing Unit
FUSING UNIT The Upper Fusing Roller (teflon roller) and Lower Fusing Roller (silicon rubber + teflon tubing) together apply heat and pressure to the toner and paper to permanently fix the developed image to the paper. Drive for the Upper Fusing Roller is transmitted from the Main Drive Motor to the Upper Fusing Roller Drive Gear.
Page 98: Fusing Temperature Control
21-1. Fusing Temperature Control The Upper Fusing Roller is heated by Fusing Heater Lamp H1 which is an AC halogen lamp. Fusing Thermistor TH1 installed on the Upper Fusing Roller helps keep the optimum fusing temperature. The fusing temperature is normally controlled at 180°C. To ensure good fusing performance, however, even when the Lower Fusing Roller remains cool immediately after warm-up in the early morning, the temperature is controlled as follows if the fusing temperature is below 100°C when the...
Page 99 1139C07MAA M-73...
Page 100: Fusing Rollers Pressure Mechanism
21-2. Fusing Rollers Pressure Mechanism Pressure Springs are installed on both ends of the Lower Fusing Roller. These springs contact the bearings mounted on both ends of the Lower Fusing Roller and exert pressure through the Lower Fusing Roller to the Upper Fusing Roller which is installed in the Fusing Unit.
Page 101: Fusing Unit Malfunction
21-4. Fusing Unit Malfunction Abnormal fusing temperature trouble (C0500, C0510, C0520) is detected under any of the following timings: a) C0500: Warming-up Failure The surface temperature of the Upper Fusing Roller does not reach 50°C within 30 seconds. The surface temperature of the Upper Fusing Roller does not reach 100°C within 30 seconds after it has reached 50°C.
Page 102: Exit Unit
EXIT UNIT The Paper Exit Roller/Rolls feed the paper, to which the developed image has been fixed, out of the Fusing Unit onto the Copy Tray. The Charge Neutralizing Brush touches the surface of the sheet of paper being fed out of the Fusing Unit to neutralize any static charge left on it.
Page 103: Paper Exit Sensor
22-2. Paper Exit Sensor Paper Exit Sensor PC53 installed in the paper exit section of the lower half of the copier detects the sheet of paper being fed out of the Fusing Unit onto the Copy Tray. Actuator Paper Exit Roller Paper Exit Sensor PC53 1139C08MAA M-77...
Page 104: Exit/Duplex Switching Unit (Option
EXIT/DUPLEX SWITCHING UNIT (OPTION) If the copier is configured with an optional Sorter or Staple Sorter, or Duplex Unit (installed in the Cabinet), the Exit/Duplex Switching Unit must be fitted to the exit section of the copier. Exit/Duplex Switching Plate Drive Transmitting Gear (coupled to a gear in the Exit Section of the copier)
Page 105: Dehumidifying Switch
DEHUMIDIFYING SWITCH Japan, ROC, South Africa, Singapore, Malaysia, Indonesia, Hong Kong only Turning ON Dehumidifying Switch S3 provided on the copier, with the power cord plugged in and Power Switch S1 in the OFF position, activates both Drum Dehumidifying Heater H2 located under the Synchronizing Rollers and Paper Dehumidifying Heater H3 installed between the 1st and 2nd Drawers.
Page 106: Manual Bypass Feeding
MANUAL BYPASS FEEDING The copier is equipped with a Manual Bypass Table on its right-hand side. When using the manual bypass copying capability, the user inserts the copy paper along the Paper Guide Plate at the front on the Table. Transport Roller Sensor PC51 detects the paper inserted via the Manual Bypass Table, which causes the copier to start the copy cycle.
Page 107: Multi Bypass Table Mb-1 (Option
MULTI BYPASS TABLE MB-1 (OPTION) The optional Multi Bypass Table permits the user to make multiple copies (up to 50) on paper that cannot be fed automatically via any built-in paper drawer of the copier. Max. allowable paper length: 540 mm Lever Paper Empty Sensor...
Page 108: Paper Take-Up Mechanism
26-1. Paper Take-Up Mechanism The Paper Take-Up Rolls are normally in their raised (retracted) position so that they will not hamper proper loading of paper. When the Start Key is pressed, Paper Take-Up Solenoid (MB-1) SL51 is deenergized causing the Paper Take-Up Rolls to press the paper stack downward and take up a sheet of paper.
Page 109 Main Drive Motor M2 Start Key SL OFF (Paper Take-Up) Roll DOWN) SL ON (Paper Take-up) Roll UP) Approx. 300msec. Paper Take-up Solenoid (MB-1) SL51 Approx. 500msec. Approx. 500msec. Paper Take-up Clutch (MB-1) CL51 Approx. 300 Approx. 300 msec. msec. Transport Roller Sensor PC51 1st Sheet 2nd Sheet...
Page 110: Paper Separating Mechanism
26-2. Paper Separating Mechanism The paper separating mechanism ensures that only the top sheet of paper is fed in by separating the second sheet of paper from the top one. This is accomplished by the Torque Limiter fitted to the Separator Roll shaft which stops the Separator Roll when there is a change in friction between the Feed and Separator Rolls.
Page 111: Paper Empty Detection
26-3. Paper Empty Detection The Multi Bypass Table is equipped with Paper Empty Sensor (MB-1) PC32 which detects a sheet of paper at the manual bypass port. Paper Empty Sensor (MB-1) PC32 Paper Take-Up Roll Paper Stopper Actuator 1139C28MAA M-85...
Page 112: Original Cover Angle Detection
ORIGINAL COVER ANGLE DETECTION Original Cover Detecting Sensor PC111 detects the angle of the Original Cover as it is raised. The following control is provided. Original Cover raised to an angle of 15° or more: The size of the original is read by the Original Size Detecting Sensors. Original Cover raised to an angle of less than 15°: When PC111 is activated, the original size data is latched and Original Size Detecting Board UN2 transmits the size data to PWB-A.
Page 113: Cooling Fan
COOLING FAN 28-1. Cooling Fan Ozone produced by the PC Drum Charge Corona and Image Transfer/Paper Separator Coronas is and absorbed drawn out of the copier by Cooling Fan Motor M9, by the Ozone Filter. M9 is turned either at high or low speed. It turns at high speed for 0.5 seconds during a copy cycle and after the Power Switch is turned ON.
Page 114: Cooling Fan Motor Malfunction
28-2. Cooling Fan Motor Malfunction A defective Cooling Fan Motor M9 (C004C) is detected at the following timing. The M9 Lock signal remains HIGH for a consecutive 3-second period during a period from when M9 starts turning at Cooling Fan Motor 3sec high speed to when it stops turning.
Page 115: Optical Section Cooling Fan
OPTICAL SECTION COOLING FAN Optical Section Cooling Fan Motor M3 draws outside air into the copier and blows it against the Original Glass which is heated by lit Exposure Lamp LA1. The Filter at the intake port of the Fan prevents dust and dirt from entering the Optical Section of the copier.
Page 116: Power Supply Unit Cooling Fan
POWER SUPPLY UNIT COOLING FAN 30-1. Power Supply Unit Cooling Fan Power Supply Unit Cooling Fan Motor M10 draws outside air into the copier to protect the Power Supply Unit from thermal damage. M10 turns only during a copy cycle. PWB-A Power Supply Unit Cooling Fan Motor M10...
Page 117: Power Supply Unit Cooling Fan Motor Malfunction
30-2. Power Supply Unit Cooling Fan Motor Malfunction A defective Power Supply Unit Cooling Fan Motor M10 (C004E) is detected at the following timing. The M10 Lock signal remains HIGH for a consecutive 3-second period after M10 has started turning. Power Cooling Fan Motor 3sec Lock Signal...
Page 118: Memory Backup
MEMORY BACKUP IC1 (RAM) of RAM Board PWB-R connected to Main Control Board PWB-A stores the setting/adjustment values set in the Tech. Rep. Modes as well as the counter counts. Backup Battery BAT1 is mounted on the PWB-R to prevent the contents of memory from being lost when the power cord is unplugged or PWB-R removed from the copier.
Page 119: Main Drive Motor M2 Malfunction
MAIN DRIVE MOTOR M2 MALFUNCTION A defective Main Drive Motor M2 is detected under any of the following timings. a) C0000: Main Drive Motor’s Failure to Turn The M2 Lock signal remains HIGH for a consecutive 1-second period after 1 second after M2 has been energized.
Page 120 PC DRIVE MOTOR M1 MALFUNCTION A defective PC Drive Motor M1 is detected under any of the following timings. a) C0010: PC Drive Motor’s Failure to Turn The M1 Lock signal remains HIGH for a consecutive 1-second period after 1 second after M1 has been energized.
Page 121 MISFEED DETECTION A paper misfeed, transport failure, or a separation failure is detected by five sensors located at critical points along the paper path. 1. Types of Misfeed Detection 1) Take-up failure detection The detection circuit is enabled for a period from the start of Paper Take-Up Rolls to the activation of Paper Take-Up Sensor.
Page 122 2. Misfeed Detection Timing 1) Take-up failure detection 1st Drawer Paper Take-Up Sensor PC55 is not activated within approx. 2.39 seconds after 1st Drawer Paper Take-Up about 2.39sec PC55 Solenoid SL2 has been energized. 1139T34MC 1139T34MCA 2nd Drawer Paper Take-Up Sensor PC56 is not activated within approx.
Page 123 5) Leading edge detection by Paper Leading Edge Detecting Sensor Paper Leading Edge Detecting Sensor PC51 PC54 is not activated within approx. 1.56 seconds after Transport Roller Sensor about 1.56sec PC54 PC51 has been activated. 1139T41MCA 1139T4 Paper Leading Edge Detecting Sensor PC54 is not activated within approx.
Page 124 Copyright 1994 MINOLTA CAMERA CO., LTD Printed in Japan Use of this manual should be strictly supervised to avoid disclosure of confidential information. 1139-7991-11 94045550 MINOLTA CAMERA CO., LTD. Printed in Japan...
Page 125 EP1080 DIS/REASSEMBLY, ADJUSTMENT...
Page 126 CONTENTS SERVICE INSTRUCTIONS 1-1. PRECAUTIONS FOR DISASSEMBLY/ADJUSTMENTS . . . D-1 1-2. INSTRUCTIONS FOR HANDLING THE PWBs WITH MOS ICs ........D-2 1-3.
Page 127 CONTENTS • Cleaning of the Ds Positioning Collars ... . . D-29 • Cleaning of the Paper Dust Remover ....D-29 •...
Page 128 CONTENTS (1) Adjustment of the Maximum Exposure Lamp Voltage for the Manual Mode ......D-47 (2) Adjustment of the Optimum Exposure Setting in the Manual Mode .
Page 129: 1. Service Instructions
SERVIC E INSTRUC TIO NS 1-1. PRECAUTIONS FOR DISASSEMBLY/ADJUSTMENTS Observe the following precautions whenever servicing the copier. • Be sure to unplug the copier from the outlet before attempting to service the copier. • The basic rule is not to operate the copier anytime during disassembly. If it is absolutely necessary to run the copier with its covers removed, use care not to allow your clothing to be caught in revolving parts such as the Timing Belt and gears.
Page 130: Instructions For Handling The Pwbs
1-2. INSTRUCTIONS FOR HANDLING THE PWBs WITH MOS ICs The following precautions must be observed when handling P.W. Boards with MOS (Metal Oxide Semiconductor) ICs. During Transportation/Storage: • During transportation or when in storage, new P.W. Boards must not be indiscriminately removed from their protective conductive bags.
Page 131 If, however, the surface is contaminated with fingerprints, clean it using the following procedure. 1. Place the PC Drum into one half of its container. 2. Gently wipe the residual toner off the surface of the PC Drum with a dry, Dust-Free Cotton Pad. a) Rotate the PC Drum so that the area of its surface on which the line of toner left by the Cleaning Blade is present is facing straight up.
Page 132: Parts Which Must Not Be Touched
1-4. PARTS WHICH MUST NOT BE TOUCHED (1) Screws Purpose of Application of Red Paint Red paint is applied to the screws which cannot be readjusted, set, or reinstalled in the field. The basic rule is not to remove or loosen the screws to which red paint is applied. In addition, be advised that, if two or more screws are designated as those which must not be touched on a single part, only one representative screw may be marked with red paint.
Page 133: Disassembly/Reassembly
DISASSEMBLY/REASSEMBLY 2-1. DOORS, COVERS, AND EXTERIOR PARTS: IDENTIFICATION AND REMOVAL PROCEDURES...
Page 134 Part Name Removal Procedure Swing down the Front Door. → Remove one screw that Front Door secures the Belt. → Remove two screws that secure the Front Door (only on one side). → Slide the Door to the side from which the screws have been removed.
Page 135 Part Name Removal Procedure Swing down the Front Door. → Release and swing up the Upper Left Cover Upper Half of the copier. → Remove four screws that secure the Upper Left Cover. Swing down the Front Door. → Release and swing up the Middle Front Left Cover Upper Half of the copier.
Page 136: Removal Of Pwbs
2-2. REMOVAL OF PWBs • When removing a PWB, first go over "PRECAUTIONS FOR HANDLING THE PWBs" contained in SWITCHES ON PWBs and use the removal procedures given on the next page. • Replacement of a PWB may call for readjustments or resetting of particular items. •...
Page 137 Symbol Name Removal Procedure Swing down the Front Door. → Release and swing up the PWB-A Main Control Board Upper Half of the copier. → Remove three screws that secure the Upper Rear Cover. Swing down the Front Door. → Release and swing up the PWB-C Power Supply Board Upper Half of the copier.
Page 138: Belt Installations
2-3. Belt Installations • Rear View Drive/Suction Unit Paper Take-Up Unit D-10...
Page 139 2-4. PM Parts List • Clean or replace the following parts at regular intervals to ensure the best quality copies and an extended service life of the copier. At 50K PM Parts Part No. Marketing Areas Clean Replace 5 Rolls for U.S.A., Canada, Middle/South America, Philippines, Paper Take-Up Roll...
Page 140 At 50K PM Parts Part No. Marketing Areas Clean Replace PC Drum Charge 1139-4254-01 Corona Housing PC Drum Charge 1139-4261-01 Corona Grid Mesh PC Drum Charge 1139-4253-01 Corona Comb Electrode Image Transfer/Paper 1139-4055-01 Separator Corona Wires Image Transfer/Paper Separator Corona 1139-4056-01 Housings Lower Pre-Image...
Page 141 17. Remove three screws to remove the Solenoid Mounting Bracket. 18. Unplug one solenoid connector. 19. Unplug one photosensor connector and remove the harness from the clamp. NOTE When reinstalling the Solenoid Mounting Bracket, make sure that the Solenoid is in the deenergized position.
Page 142: Optical Section
22. Snap off one C-clip and remove the Paper Take-Up Roll. 2-5. OPTICAL SECTION (1) Removal of the Lens Drive Cable 1. Remove two screws and the Optical Section Cover. 2. Remove three screws and the Lens Cover. 3. Remove two screws, two clamps and the Lens Motor Unit.
Page 143: Winding Of The Lens Drive Cable
6. Remove the Cable Drive Gear and the Lens Drive Cable. (2) Winding of the Lens Drive Cable 1. Hold the Cable Drive Gear in position with its Bead at the bottom. 2. Wind the shorter length of the Cable three turns clockwise around the Cable Drive Gear, working from the back to the front side.
Page 144: Removal Of The Scanner Drive Cable
5. Pass the longer length of the Cable through the U-shaped hole in the Light Blocking Plate and wind it around the Pulley farther away from the Cable Drive Gear. 6. Temporarily secure the longer length of the Cable to the Cable Fixing Bracket, ensuring a distance of 5 ±2 mm for the dimension shown on the left.
Page 145 4. Align the Scanner with the rectangular hole in the upper copier frame and remove the screw from the Scanner Fixing Bracket. 5. Remove the Fixing Bracket. 6. Unhook the spring to remove the shorter length of the Cable. 7. Move the 2nd/3rd Mirrors Carriage towards the Scanner Drive Gear so that the Cable slacks off and then remove the longer length of the Cable.
Page 146: Winding Of The Scanner Drive Cable
(4) Winding of the Scanner Drive Cable Remark Whenever the Scanner Drive Cable has been rewound, be sure to make the "Adjustment of the Scanner/Mirrors Carriage Position." See p. D-64. Pulley B Pulley A Scanner Drive Gear Pulley C 1. Fit the Pulley to the Scanner Drive Gear using two screws.
Page 147 4. Fit the Scanner Drive Gear onto the Scanner Motor Mounting Bracket using one E-ring. 5. Secure the Scanner Motor Mounting Bracket to the frame using three screws. 6. Insert a wrench into the holes in the Scanner Drive Gear and the frame to position the Gear. 7.
Page 148: Removal Of The Scanner
9. Fit the Cable into the groove in the Wire Guide and hook the spring. 10. Remove the wrench and Cable Holding Jig. (5) Removal of the Scanner 1. Turn the Scanner Drive Gear to move the Scanner onto the right-hand side of the copier. Then, remove four screws to remove the Scanner.
Page 149: Cleaning Of The 1St/2Nd/3Rd Mirrors
3. Using a soft cloth dampened with alcohol, clean the Lamp by wiping its surface gently in one direction. NOTE When reinstalling the Lamp, use care not to allow the protruding navel of the Lamp to hit against the Lamp Reflector and that the protruding navel points toward the opening in the Lamp Reflector.
Page 150: Imaging Unit
2-6. Imaging Unit (1) Disassembly, Cleaning, and Replacement and Starter Changing of the Imaging Unit 1. Remove the Imaging Unit from the copier. 2. Remove two screws to remove the Imaging Unit Cover. 3. Unplug the Counter connector. 4. Remove one screw to remove the PC Drum Charge Corona Unit.
Page 151: Replacement Of The Cleaning Blade
Replacement of the Cleaning Blade 8. Remove two screws to remove the Lid. 9. Remove the spring. 10. Remove two screws, one spring, and one cap to remove the Cleaning Blade. Replace it with a new one. NOTE When the Cleaning Blade has been replaced, apply toner to the entire surface of the new Cleaning Blade.
Page 152: Cleaning Of The Pc Drum Paper Separator Fingers
Cleaning of the PC Drum Paper Separator Fingers 11. Using a soft cloth dampened with alcohol, wipe clean the Paper Separator Fingers. Cleaning of the Ds Positioning Collars 12. Using a soft cloth dampened with alcohol, wipe clean the Ds Positioning Collars. Cleaning of the Paper Dust Remover 13.
Page 153: Cleaning Of The Upper Pre-Image Transfer
NOTE At reinstallation, press the Toner Antispill Mylar up against the Imaging Unit Housing and the rear side of the copier (in the directions of the arrows) and press the Bias Seal up against the Imaging Unit Housing and the front side of the copier (in the directions of the arrows).
Page 154: Cleaning Of The Main Erase Lamp
(2) Cleaning of the Main Erase Lamp 1. Go to the rear of the copier and unplug the connector of the Main Erase Lamp. 2. Remove the Imaging Unit. 3. Pull out the Toner Bottle Holder to the front. 4. Remove one screw to remove the Main Erase Lamp. 5.
Page 155 4. Go to the rear of the copier and unplug the connector of Unexposed Areas/Edge Erase Lamp. 5. Remove the Imaging Unit. 6. Remove one screw to remove the Unexposed Areas/Edge Erase Lamp. NOTE When removing the Erase Lamp, use care not to lose the pressure spring in the rear.
Page 156: Pc Drum Charge Corona/Image Transfer
2-7. PC DRUM CHARGE CORONA/IMAGE TRANSFER CORONA UNIT (1) Cleaning of the PC Drum Charge Corona Housing 1. Remove the Imaging Unit. 2. Remove the PC Drum Charge Corona Unit. 3. Press the Mesh Holder on the front of the Corona Unit in the direction of the arrow to remove the Grid Mesh.
Page 157: Cleaning Of The Comb Electrode
(3) Cleaning of the Comb Electrode 1. Clean the Comb Electrode using the Corona Unit Cleaning Lever. (4) Cleaning of the Image Transfer/Paper Separator Coronas Wires 1. Clean the Image Transfer Corona Wire using the Corona Wire Cleaning Lever. 2. Remove the four Paper Guides. 3.
Page 158: Replacement Of The Ozone Filter
(6) Cleaning of the Lower Pre-Image Transfer Guide Plate 1. Using a brush, whisk dust off the Lower Pre-Image Transfer Guide Plate. (7) Replacement of the Ozone Filter 1. Press the Filter Cover Bracket in the direction of the arrows and pull it off. 2.
Page 159: Cleaning Of The Pre-Fusing Guide Plate
4. Remove one screw to remove the Fusing Unit Locking Plate. 5. Turning it in the direction of the arrow, remove the Fusing Unit. NOTE When reinstalling the Fusing Unit, install the Locking Plate as illustrated on the left. (2) Cleaning of the Pre-Fusing Guide Plate 1.
Page 160 4. Remove two screws to remove the Fuse Holder Unit. 5. Remove the screw and clamp that secure the Lamp harness at the front of the copier. 6. Remove the three clamps that secure the Lamp harness at the rear of the copier and one clamp that secures the Thermistor harness.
Page 161: Cleaning Of The Upper Fusing Roller
(4) Cleaning of the Upper Fusing Roller 1. Using a soft cloth dampened with alcohol or silicone oil, wipe clean the Upper Fusing Roller. 1139D198AA (5) Cleaning of the Upper Paper Separator Fingers 1. Using a soft cloth dampened with alcohol or silicone oil, wipe clean the Upper Paper Separator Fingers.
Page 162: Cleaning Of The Lower Fusing Roller
(8) Cleaning of the Lower Fusing Roller 1. Using a soft cloth dampened with alcohol or silicone oil, wipe clean the Lower Fusing Roller. (9) Cleaning of the Lower Paper Separator Fingers 1. Using a soft cloth dampened with alcohol or silicone oil, wipe clean the Lower Paper Separator Fingers.
Page 163 5. Remove the Solenoid Cover by unhooking its catches at three places. 6. Unplug the solenoid connector. 7. Remove the harness from the Solenoid Unit clamps at two places. 8. Remove one screw to remove the Solenoid Unit. NOTE Make the adjustment with If the solenoid has been removed from the Solenoid the Lever in contact with Unit, make the adjustment shown on the left with the...
Page 164 10. Remove four screws to remove the Lower Guide. 11. Snap off two E-rings to remove the Exit/Duplex Switching Plate. 12. Remove one screw to remove the Photoswitch Mounting Bracket. 13. Remove two screws to remove the Exit Rolls Mounting Bracket Unit. NOTE When reinstalling the Exit Rolls Mounting Bracket Unit, make sure that the Reinforcement Plate Unit is...
Page 165 15. Remove the harness from the clamp. 16. Remove two screws to remove the Reinforcement Plate Unit. NOTE When reinstalling the Reinforcement Plate Unit, make sure that the Unit is in contact with the frame at the front and rear sides of the copier as shown on the left. D-42...
Page 166: 3 Adjustment
ADJUSTMENT 3-1. JIGS AND TOOLS USED Important • When adjusting the positions of the Scanner and Mirrors Carriage, use Jigs numbered • When adjusting the gap between the Doctor Blade and Sleeve Roller, use Jigs numbered • When adjusting the position of PC Drum Paper Separator Fingers, use Jigs numbered á...
Page 167: Adjustment Requirements List
3-2. ADJUSTMENT REQUIREMENTS LIST Ref. Adjustment Item Requirements Adjusting Point Page 100 to 127V areas: 81 ±1 V Max. Exposure Lamp Control panel D-47 200 to 240V areas: 162 ±2 V Voltage Optimum Exposure Setting Kodak Gray Scale: in the Manual Exposure no image of the 1st step, Control panel D-51...
Page 168: Adjustment Of Switches
3-3. ADJUSTMENTS OF SWITCHES Microswitches The following microswitches are used in various parts of this copier. Blue Yellow Wiring for the NO Type Wiring for the NC Type NC (Normally-Closed) : Current flows between NC and COM when the actuator is open. NO (Normally-Open) : Current flows between NO and COM when the actuator is closed.
Page 169: Adjustment Of Front Door Interlock Switch S21
(1) Adjustment of Front Door Interlock Switch S21 1. Open the Right Door. 2. Remove the Middle Right Cover. (4 screws) 3. Remove the Upper Right Cover. (2 screws) 4. Remove the Right Cover. (2 screws) 5. Swing down the Front Door. 6.
Page 170: Electrical/Image Adjustment
3-4. ELECTRICAL/IMAGE ADJUSTMENTS (1) Adjustment of the Maximum Exposure Lamp Voltage for the Manual Mode Requirement • Maximum Exposure Lamp voltage: 81 ±1V (RMS value) Important • After the maximum Exposure Lamp voltage has been adjusted, be sure to make the following adjustments: Optimum Exposure Setting in the Manual Mode and Optimum Exposure Setting in the Auto Mode.
Page 171 When using the testers, voltmeters, or multimeters which show only the mean value, not Rms values, carry out the following procedure. 1. Measure the line voltage. 2. Referring to the Mean Value Chart corresponding to each voltage area, see the figure under the voltage obtained in step 1.
Page 172 MEAN VALUE CHART FOR 200/220/240V AREAS MEAN 162.0 135.9 135.2 134.5 133.8 133.2 132.6 131.9 131.4 130.8 130.2 VALUE MEAN 162.0 129.7 129.1 128.6 128.1 127.6 127.1 126.6 126.1 125.7 125.2 VALUE MEAN 162.0 124.7 124.2 123.9 123.5 123.1 122.7 122.2 121.9 121.5 121.1 VALUE MEAN 162.0...
Page 173 (2) Adjustment of the Optimum Exposure Setting in the Manual Mode Requirement • When the manual exposure setting is at the central indication, no image of step no. 1 of a Kodak Gray Scale should be produced on the copy, but a faint image of step no. 2 should be produced. No image of Faint image of step no.
Page 174 (3) Adjustment of the Optimum Exposure Setting in the Auto Mode Important • This adjustment must be made after the optimum exposure setting in the Manual Mode has been adjusted. 1. Place about five sheets of A3 or 11" × 17" paper on the Original Glass and lower the Original Cover.
Page 175: Adjustment Of The Atdc Sensor
(4) Adjustment of the ATDC Sensor Important • This adjustment is not necessary when a new Imaging Unit has been installed. (The ATDC Sensor is automatically adjusted when the starter is charged and turn ON the Power Switch.) • The adjustment must be made whenever the currently used Imaging Unit has been charged with new starter.
Page 176: Adjustment Of The Aperture Blades
(5) Adjustment of the Aperture Blades Requirement • There should be no dark or light bands running in the feeding direction on copies produced. (Adjust to obtain the center image density for all areas.) Important • If dark and light bands running in the feeding direction occur on copies, make this adjustment after checking the following.
Page 177 (6) Adjustment of the Manual Bypass Table Reference Position Requirement • Ready a test chart (A3 or 11" × 17") as shown on the left. Draw a line on the chart at a point 20 mm from the right edge as shown. •...
Page 178 (7) Adjustment of the 1st/2nd Drawer Reference Position Requirement • Ready a test chart (A3 or 11" × 17") as shown on the left. Draw a line on the chart at a point 20 mm from the right edge as shown. •...
Page 179: Position
(8) Adjustment of the Paper Lifting Plate Springs (2nd Drawer) Important • When the paper size loaded in the 2nd Drawer has been changed, be sure to replace the Springs by referring to the Table given below. (For replacement of the Springs, see p. D-13.) •...
Page 180: Adjustment Of The Leading Edge Registration
(9) Adjustment of the Leading Edge Registration Full Size Requirement • Ready a test chart (A3 or 11" × 17") as shown on the left. Draw a line across the test chart at a point 20 mm from the leading edge and use it as the reference line.
Page 181 3. If the registration does not meet the requirement, go to Stop the control panel and press the Stop Key, Multi-Copy Key "0," Stop Key, and Multi-Copy Key "1," in that order, to set the copier into a state ready to enter a particular Tech.
Page 182: Enlargement
Enlargement 1. After the leading edge registration in the full size mode has been adjusted, make two single copies in an enlargement mode (200 %) and check for leading edge registration on the second copy. (If the enlargement leading edge registration meets the requirement, go to "Adjustment of Reduction Leading Edge Registration.") 2.
Page 183: Reduction
Reduction 1. After the leading edge registration in an enlargement mode has been adjusted, make two single copies in a reduction mode (50 %) and check for leading edge registration on the second copy. 2. If the registration does not meet the requirement, adjust the enlargement leading edge registration a second time and ensure that leading edge registration both in an enlargement and reduction mode meets the...
Page 184 (10) Adjustment of the Image Leading Edge Erase Width Requirement • Ready a test chart (A3 or 11" × 17") as shown on the left. Paint a 20 mm-long rectangle in black at the center of the test chart along its leading edge as shown.
Page 185 6. Press the Clear Key to clear the current setting value. 7. With the old setting value used as reference, enter the new setting value using the appropriate Multi-Copy Keys. AUTO NOTE If the erase width on the copy is less than 0.5 mm, increase the setting value.
Page 186: Lamp Position
(11) Adjustment of the Unexposed Areas/Edge Erase Lamp Position Requirement • Edge erase width: Within 4 mm Important • This adjustment must be made after the reference positions of the Manual Bypass Table and 1st and 2nd Drawers have been adjusted. 1.
Page 187: Other Adjustments
3-5. OTHER ADJUSTMENTS (1) Adjustment of the Scanner/Mirrors Carriage Position Requirement • With the Scanner positioned correctly with reference to the upper copier frame, there should be no gap between the Scanner/Mirrors Carriage and the Scanner/Mirrors Carriage Positioning Jig. 1. Remove the Original Cover, Original Scales, and Original Glass.
Page 188: Sleeve Roller
(2) Adjustment of the Gap Between the Doctor Blade and Sleeve Roller Requirement • The gap between the Doctor Blade and the Sleeve Roller should be 0.35 mm ±0.05 mm. Important • Cover the PC Drum with the Drum Cloth to prevent it from being scratched. 1.
Page 189 (3) Adjustment of the PC Drum Paper Separator Fingers Position Requirement • The gap between the PC Drum and the PC Drum Paper Separator Fingers should be 1.0 ±0.5 mm when the Separator Solenoid is in the deenergized position. Important •...
Page 190: Adjustment Of The Original Size Detecting Board
(4) Adjustment of the Original Size Detecting Board Important • This adjustment must be made after the Original Size Detecting Board has been replaced. 1. Lower the Original Cover with no paper on the Original Glass. 2. On the control panel, press the Stop Key, Multi-Copy Key "0,"...
Page 191: 4 Miscellaneous
MISCELLANEOUS 4-1. INSTALLATION OF THE PLUG-IN COUNTER MOUNTING BRACKET (OPTION) 1. Remove the Middle Right Cover. 2. Remove the Counter Cover. 3. Remove the Upper Right Cover. 4. Remove the Right Cover. 5. Unplug the short-circuit connector. 6. Connect the Plug-In Counter Connector. 7.
Page 192 Copyright 1994 MINOLTA CAMERA CO., LTD Printed in Japan Use of this manual should be strictly supervised to avoid disclosure of confidential information. 1139-7992-11 94045550 MINOLTA CAMERA CO., LTD. Printed in Japan...
Page 193 EP1080 SWITCHES ON PWBs...
Page 194 CONTENTS ............S-1 PRECAUTIONS FOR HANDLING THE PWBs 1-1.
Page 195: Precautions For Handling The Pwbs
PRECAUTIONS FOR HANDLING THE PWBs 1. Transportation and Storage a) During transportation or when in storage, the PWBs must not be indiscriminately removed from their protective conductive cases or bags. b) Protect the PWBs from any external force. Use care not to bend or damage them. c) Once the PWB has been removed from its conductive case or bag, never place it directly on an object that is easily charged with static electricity (carpet, plastic bags, etc.).
Page 196: Functions Of Switches And Other Parts On Pwbs
FUNCTIONS OF SWITCHES AND OTHER PARTS ON PWBs Master Board PWB-A PJ22 MEMORY TOTAL 1139D065AA Symbol Name Resetting Function Remark After correcting the Resets a malfunction A malfunction condition malfunction, press the including fusing of, or misfeed in, the Trouble Reset Switch. malfunctions.
Page 197 Data/Conditions Changed at Initialize and Memory Clear Memory Item Initialize Description Clear Misfeed/malfunction Reset Reset to initial settings Fixed magnification ratios (according to the marketing area) See NOTE. User’s/Tech. Rep. Choice Reset to initial settings Copy job program All memory clear Paper sizes Reset to initial settings Factory-adjusting data...
Page 198: Tech. Rep. Program Mode
TECH. REP. PROGRAM MODE • The Tech. Rep. Program Mode allows the Tech. Rep. to make various adjustments and settings, as well as to perform specific functions, for his/her service jobs performed in the field. 1. Tech. Rep. Mode Setting Procedure Types of Tech.
Page 199: Test Mode
2. Test Mode • This mode allows the Tech. Rep. to perform various functional tests and adjustments. Description of Each Test Mag. Multi- Multi- Description Setting Procedure Ratio Copy Copy Display Indicator • • Paper passage test Press the Start Key to start the test in It is carried out in the •...
Page 200 AE Sensor reference voltage 1. Place five sheets of blank A3 paper Memory setting level 00 (Minolta standard paper) on the This test automatically adjusts to FF Original Glass and press the Start the AE Sensor memory level Key to start the automatic (adjustment value) and AE adjustment procedure.
Page 201 Test Mode Setting Procedure (1) With the copier in the state ready to enter a particular Tech. Rep. Mode, press "1." (2) Using the appropriate Multi-Copy Key, select the particular Test Mode operation to be run. If you enter a wrong number, press the Clear Key and then enter the correct one. Components Energized in the Test Mode Operation Component...
Page 202: Tech. Rep. Choice Mode
3. Tech. Rep. Choice Mode • This mode allows the Tech. Rep. to make various adjustments and settings, including copy charge counter settings, according to the needs of the user. Description of Each Choice Mode Multi- Choice Mode ∗ Code Description Setting ( : Initial Setting)
Page 203 Multi- ∗ Code Choice Mode Name Description Setting ( : Initial Setting) Copy ∗ 50K Stop Mode Selects whether or not to Disables 50K stop. Inch Areas inhibit copying when a ∗ Enables 50K stop. Metric toner-empty condition is Areas detected after the IU Counter has counted 50,000.
Page 204 NOTES: • When the PM Counter Mode (C-5) has been set to 0 or 1 and when the Maintenance Call Reminder ON/OFF Mode (C-4) has been set to 1, the IU Service Life Indicator lights up when the Counter counts down to zero. (At this time, a copy cycle can still be initiated.) •...
Page 205 Table 1 Copy Mode 1-Sided 2-Sided Manual Sizes Sizes Paper Size Counter Mode Bypass other than Set sizes other than Set sizes those set those set Total Counter Mode C-2 Total Size 2-Sided Total 2-Sided Size Counting Plug-In Copies Counter Counting Counting Mode...
Page 206 C-23: Loop Length Adjustment Mode Multi-Copy Initial Multi-Copy Initial Setting Setting Setting Setting −3 Loop length increased −2 Loop length decreased −1 Standard ∗ NOTE: Loop length varies in approx. 0.7 mm (Approx. 7 mm) pitch for each step. C-31: 1-Sided Original Stop Position Multi-Copy Initial Setting...
Page 207: Altering Fixed Magnification Ratios Mode
4. Altering Fixed Magnification Ratios Mode • This mode allows the Tech. Rep. to change the fixed full size, enlargement, or reduction ratios according to the needs of the user. Fixed Magnification Ratios Altering Procedure (1) With the copier in the state ready to enter a particular Tech. Rep. Mode, press "3" to set the copier into the Altering Fixed Magnification Ratios Mode.
Page 208 5. Counters Mode: PM Counter and Ports/Options Counter • This mode shows the counts of the PM Counter (count-down type) and the Ports/Options Counter (count-up type) across the Magnification Ratio Indicator and Multi-Copy Display. This helps the Tech. Rep. in determining when preventive maintenance is necessary or to provide information on the life of parts.
Page 209 Types of Counters and Display Order Magnification Multi-Copy Type Monitor Display Ratio Indicator Display ST-101 Stapler 1139S007AB AF-3/AFR-7 1139S008AB NOTE: If a PF-101 (for Inch Areas) is being used, the PF-101 count is shown as the PF-201 3rd Drawer count. No count is given for PF-201 4th Drawer. •...
Page 210: Paper Size Counter Mode
6. Paper Size Counter Mode • This mode shows the counts of different sizes of paper used across the Magnification Ratio Indicator and Multi-Copy Display. When the count of a particular size of paper is shown, the corresponding Paper Size Indicator lights up. Types of Counters and Display Order Metric Areas: Order...
Page 211: Misfeed Counter Mode
7. Misfeed Counter Mode • This mode shows on the Magnification Ratio Indicator the number of paper misfeeds that has occurred at different locations in the copier. The Monitor Display tells the location of the misfeed, the count of which is currently given, by a lit LED. In this mode, the Misfeed Indicator is lit up.
Page 212 Types of Misfeed Counters Paper Magnification Multi-Copy Select Type Monitor Display Ratio Indicator Display Exit 1139S017AB AD-3/PF-1D entrance/transport 1139S018AB AD-3/PF-1D 1139S019AB ST-101/S-104 1139S020AB AF-3/AFR-7 1139S021AB If a PF-101 (for Inch Areas) is being used, the misfeed count for PF-101 is shown as the PF-201 3rd Drawer count.
Page 213: Malfunction Counter Mode
8. Malfunction Counter Mode • This mode shows on the Multi-Copy Display the number of malfunctions that occurred at different locations in the copier and options. At the same time, the Magnification Ratio Indicator shows the corresponding malfunction code. Types of Malfunction Counters Monitor Multi-Copy Magnification...
Page 214 Monitor Multi-Copy Magnification Order Description Display Display Ratio Indicator An ATDC Sensor malfunction A Paper Empty Sensor malfunction An Original Size Detecting Sensor malfunction An ST-101 Paper Clamp Unit moving malfunction An ST-101 Paper Aligning Motor malfunction An ST-101 Staple Unit malfunction An ST-101/S-104 Bin moving malfunction An AD-3/PF-1D Guide Plates malfunction An AD-3/PF-1D entrance port switching...
Page 215: Parts/Supplies Life Counter Mode
9. Parts/Supplies Life Counter Mode • This mode shows on the Magnification Ratio Indicator and Multi-Copy Display the number of copy processes to which different parts or supplies have been subjected. Meanwhile, the Magnification Ratio Indicator also shows the symbol representing the part or supply. Types of Parts/Supplies Life Counters Magnification Ratio Order...
Page 216: Paper Size Input Mode
10. Paper Size Input Mode • This mode allows the Tech. Rep. to enter the size (length and width in mm) of the paper loaded in the 2nd Drawer of the copier and the Drawers/Trays of PF-201 or PF-101 (for Inch Areas).
Page 217 Metric Sizes Entry (mm) Entry (mm) Paper Paper Length (feeding Width (crosswise Length (feeding Width (crosswise Size Size direction length) direction length) direction length) direction length) A3(L) B5(L) B4(L) B5(C) A4(L) A5(L) A4(C) Inch Sizes Entry (mm) Entry (mm) Length Width Length Width...
Page 218: Display Mode
11. Display Mode • This mode permits checking of the time it takes the copier to complete different functions. (This should only be used at the factory.) Types of Displays Multi-Copy Magnification Ratio Multi-Copy Display Description Indicator (Time) (Code) Warm-up time (×100 ms) First copy time (×100 ms) Multiple copy time (×100 ms) Display test mode...
Page 219: Adjust Mode
ADJUST MODE • Whenever the RAM PWB has been replaced, or memory cleared for any reason, be sure to make the Adjust Mode settings exactly the same way as indicated on the label inside the Front Door (which are the factory settings). Types of Adjust Modes Multi-Copy Mode Type...
Page 220 A0: Lens Focal Length Adjustment • Adjusts the position of installation of the Lens. Setting Description Initial Setting Value Short focal length ∗ Standard Long focal length A1: Lens Full Size Position Correction (When A0 = 50) • Corrects the magnification ratio in the crosswise direction by varying the Lens’ full size position in 16 steps (1 step = 4 pulses).
Page 221 A2: Mirror Full Size Position Correction (When A0 = 50) • Corrects the conjugation distance of the Mirror by varying the Mirror’s full size position in 16 steps (1 step = 8 pulses). Setting Description Initial Setting Value Correction: +46 Correction: +102 ∗...
Page 222 <A4: Full Size Registration Adjustment> • Adjusts registration between the leading edge of the original and that of the image in the full size mode. <A6: Book-B Scan Registration Adjustment> • Adjusts the leading edge erase width in the Book-B scan. <A11: Enlargement/Reduction Registration Adjustment>...
Page 223 USER’S CHOICE MODE • The User’s Choice Mode allows the user to program the copier (making priority and other settings) according to his/her particular needs. Types of User’s Choice Modes Multi-Copy Multi-Copy Mode Name Mode Name Mixed Original Detection Auto clear ON/OFF Lightweight Original Energy Saving Mode ON timing Paper size priority...
Page 224 Details of Choice Setting Options • UCH-0 Mixed Original Detection Determines whether or not to select the Mixed Original Detection Mode as the priority mode, valid only when the copier is equipped with an AF-3/AFR-7. • If "Mixed Original Detection Mode ON" is selected, the copier can make copies from originals of assorted sizes loaded in a set.
Page 225 • UCH-12 Auto Paper Mode/Auto Size Mode/Manual priority Specifies the priority mode selected automatically when the Power Switch is turned ON or Panel Reset Key pressed. Multi-Copy Description Initial Setting ∗ Auto Paper Select (APS) Auto Magnification Select (AMS) Manual •...
Page 226 • UCH-14 Priority exposure mode/level Determines the priority exposure mode, either Auto or Manual. • If priority is given to Manual, this mode also specifies the priority exposure level (EXP) in the Manual Exposure Mode. • If priority is given to Auto, this mode also specifies the priority exposure level (EXP) automatically selected when the mode is switched from Auto to Manual.
Page 227 • UCH-20 Auto clear ON/OFF Determines whether or not to activate automatically the auto clear (panel reset) function after the lapse of 60 sec. after a copy cycle has been completed or a Key on the control panel operated. Multi-Copy Description Initial Setting Auto clear is not activated.
Page 228 • UCH-24 Sort/Non-Sort switching ON/OFF Specifies whether to enable or disable the function that automatically switches between the Sort and Non-Sort Mode depending on the number of originals loaded in the AF-3/AFR-7 or the number of copies to be made. The mode is switched as detailed below when this choice is set to ON: (1) The Sorter or Staple Sorter is switched into the Non-Sort Mode if a copy cycle is initiated using a single original in the Sort Mode.
Page 229 Copyright 1994 MINOLTA CAMERA CO., LTD Printed in Japan Use of this manual should be strictly supervised to avoid disclosure of confidential information. 1139-7997-11 94045550 MINOLTA CAMERA CO., LTD. Printed in Japan...
Page 230 EP1080 TROUBLESHOOTING...
Page 231 CONTENTS ∗ : Only when options are used INTRODUCTION 1-1. General Precautions ........T-1 1-2.
Page 232 CONTENTS 1-7. C0600: Scanner Motor malfunction....T-52 C0610: Lens Motor malfunction C0620: Mirror Motor malfunction ∗ 1-8. C0900: 3rd Drawer Lift-Up Sensor malfunction ..T-54 C0904: 3rd Drawer Lift-Up Motor malfunction C0950: 4th Drawer Lift-Up Sensor malfunction C0954: 4th Drawer Lift-Up Motor malfunction...
Page 233: Introduction
INTRODUCTION 1-1. General Precautions 1. When servicing the copier with its covers removed, use utmost care to prevent your hands, clothing, and tools from being caught in revolving parts including the chains and gears. 2. Before attempting to replace parts and unplugging connectors, make sure that the power cord of the copier has been unplugged from the wall outlet.
Page 234: Paper Transport Failure
PAPER TRANSPORT FAILURE 1. Paper Misfeed When a paper misfeed occurs in the copier, the corresponding Misfeed Location Monitor LED on the control panel blinks to let the user know where the misfeed has occurred. If an LED lights up steadily, it indicates that there might be a sheet of paper present at that particular location in the copier.
Page 235 The paper misfeed, including a sheet of paper that is likely to be present, in the copier as well as in the paper feeder options is detected by the following sensors. Paper Leading Edge Detecting Paper Exit Sensor PC54 Sensor PC53 Transport Roller ∗...
Page 236 Here is an at-a-glance listing of misfeed detections made by the various sensors of the copier. A: Misfeed Detected in Conjunction with Leading Edge Detection Blinking LED Location Description Timer Start Sensor Timing Before the Paper Take-up failure Paper take-up start Paper Take-Up Take-Up Sensor Sensor (leading edge)
Page 237 B: Misfeed Detected in Conjunction with Trailing Edge Detection Blinking LED Location Description Timer Start Sensor Timing Vertical Transport Trailing edge Leading edge Paper Take-Up Section detection by the detection by the Sensor Paper Take-Up Paper Take-Up (trailing edge) Sensor Sensor Vertical Transport Trailing edge...
Page 238: Misfeed Detected When Copier Is Turned On
1-1. Misfeed Detected When Copier is Turned ON Procedure 1. Check for lit LED and remove a sheet of paper if present at the LED location. 2. If an LED or LEDs light up again, perform the following procedure. 1139T025AA Lit LED Paper Location Sensor...
Page 239 Lit LED Paper Location Sensor Action Exit Section Paper Exit Sensor PC53 See step 8 on p. T-23 (Fusing/Exit Misfeed Clearing Procedure). 2nd Paper Exit Sensor PC30 See step 8 on p. T-23 (Fusing/Exit Misfeed Clearing Procedure). Turnover Section Duplex Vertical Transport See step 5 on p.
Page 240: Copier Take-Up Misfeed
1-2. Copier Take-Up Misfeed Symbol Name PWB-A PC51 Transport Roller Sensor PC55 1st Drawer Paper Take-Up Sensor PC55 PC56 2nd Drawer Paper Take-Up PC51 Sensor 1st Drawer Paper Take-Up Solenoid PC56 2nd Drawer Paper Take-Up Solenoid Paper Transport Clutch PWB-A Main Control Board 1139T001AA 1139C01TAA...
Page 241 Copier Take-Up Misfeed Clearing Procedure Symptom Step Check Item Result Action • Paper is not taken Is the paper being used up Instruct the user to use the up at all. to product specifications? paper that is up to product specifications.
Page 242 1139C01T 1139C01TAA T-10...
Page 243 Symptom Step Check Item Result Action • Paper is Is the output signal from the Replace PWB-A. stationary before Paper Take-Up Sensor the Vertical being properly input to Transport Roller. PWB-A? • Paper is Does the voltage across Check the Actuator for stationary at the PJ16A-6 (1st Drawer) or operation.
Page 244: Paper Feed Cabinet Take-Up Misfeed
PC29 4th Drawer Paper Take-Up (PF-201) Detection Sensor Vertical Transport Drive Motor 3rd Drawer Paper Take-Up PC22 Motor PC21 4th Drawer Paper Take-Up PC29 Motor PWB-A Main Control Board (EP1080) PWB-A Master Board (PF-201) PWB-F Fuse Board 1139T005AA 1139C02TDA T-12...
Page 245 Paper Feed Cabinet Take-Up Misfeed Clearing Procedure Symptom Step Check Item Result Action • Paper is not taken Is the paper being used up Instruct the user to use the up at all. to product specifications? paper that is up to product specifications.
Page 246 1139C02TDA T-14...
Page 247 Symptom Step Check Item Result Action • Paper is Does the voltage across Replace PWB-A or PWB-A stationary near PJ9AA-12 on PWB-A and (PF-201). Vertical Transport GND change from DC5V to Check the Actuator for Detection Sensor DC0V when PC22 is operation and check the 4 PC22.
Page 248: Bypass Port Misfeed ( Multi Bypass Table
1-4. Bypass Port Misfeed Symbol Name PWB-A SL51 CL51 PC51 Transport Roller Sensor ∗ SL51 Paper Take-Up Solenoid (MB-1) Paper Transport Clutch ∗ CL51 Paper Take-Up Clutch (MB-1) PWB-A Main Control Board PC51 ∗ : When the optional Multi Bypass Table MB-1 ∗: is installed 1139T002AA...
Page 249 Bypass Port Misfeed Clearing Procedure Symptom Step Check Item Result Action Does the misfeed occur Perform the troubleshooting when the Manual Bypass procedure for Table is used? "Transport/Separator Misfeed." Is paper taken up and fed in Perform the troubleshooting properly from the Drawer? procedure for "Copier Take-Up and Transport/Separator...
Page 250: Transport/Separator Misfeed
1-5. Transport/Separator Misfeed Symbol Name PC51 Transport Roller Sensor PWB-A PC54 Paper Leading Edge Detecting Sensor Separator Solenoid PC51 Synchronizing Roller Clutch Suction Fan Motor PC54 PWB-A Main Control Board 1139T003AA 1139C04TAA T-18...
Page 251 Transport/Separator Misfeed Clearing Procedure Symptom Step Check Item Result Action • Paper is Is the paper curled, waved, Change the paper. stationary before or damp? Instruct the user in how to the Synchronizing store the paper. Roller. Does the voltage across Replace PWB-A.
Page 252 1139C04TAA T-20...
Page 253 Symptom Step Check Item Result Action • Paper is wedged Does the voltage across Adjust the Solenoid, or at the Paper PJ24A-4 on PWB-A and check the Paper Separator Separator Fingers. GND change from DC24V Fingers for operation and to DC0V after the Start Key clearance.
Page 254: Fusing/Exit Misfeed
1-6. Fusing/Exit Misfeed Symbol Name PWB-A PC53 Paper Exit Sensor PC30 2nd Paper Exit Sensor PC54 Paper Leading Edge Detecting PC54 Sensor Suction Fan Motor PWB-A Main Control Board PC31 PC53 1139T004AA 1139C05TAA T-22...
Page 255 Fusing/Exit Misfeed Clearing Procedure Symptom Step Check Item Result Action • Paper is Is the paper curled, waved, Change the paper. stationary before or damp? Instruct the user in how to the Fusing Roller. store the paper. Is the Guide Plate dirty with Clean the Guide Plate.
Page 256: Duplex Unit Vertical Transport Misfeed
PC53 SL31 PWB-A SL31 Duplex Unit Gate Switching PC12 (PF-201) Solenoid (PF-1D) PC14 SL61 Turnover/Exit Switching Solenoid PC13 Duplex Unit Drive Motor PWB-A Main Control Board (EP1080) 1139T007AA PWB-A Master Board (PF-201) (PF-1D) PWB-G Duplex Unit Master Board 1139C12TDA T-24...
Page 257 Duplex Unit Vertical Transport Misfeed Clearing Procedure Symptom Step Check Item Result Action • Paper is Is the paper curled, waved, Change the paper. stationary near or damp? Instruct the user in how to the Exit Section. store the paper. Does the voltage across Adjust the stroke of the PJ6A-5 on PWB-A and...
Page 258 1139C12TDA T-26...
Page 259 Symptom Step Check Item Result Action • The leading edge Is the Paper Guide Mylar Clean or replace the Mylar. of the paper is deformed or dirty? Check the Mylar moving stationary inside mechanism. the Duplex Unit. Does the Gate Switching Adjust the stroke of the Plate operate properly? Solenoid or check the...
Page 260: Duplex Unit Take-Up Misfeed
1-8. Duplex Unit Take-Up Misfeed Symbol Name PC16 Duplex Unit Paper Take-Up Sensor PC17 Vertical Transport Detection Sensor 3 PWB-G SL33 Duplex Unit Pick-Up Solenoid PC17 CL31 Duplex Unit Paper Take-Up Clutch Vertical Transport Drive Motor SL33 PC16 PWB-A PWB-A Master Board (PF201) (PF-1D) (PF-201) (PF-1D)
Page 261 Duplex Unit Take-Up Misfeed Clearing Procedure Symptom Step Check Item Result Action • Paper is not taken Is the paper curled, waved, Change the paper. up at all. or damp? Instruct the user in how to store the paper. Is Duplex Unit Pick-Up Adjust the stroke of the Solenoid SL33 energized Solenoid or check the...
Page 262 1139C13TDA T-30...
Page 263 Symptom Step Check Item Result Action • Paper is Is Vertical Transport Drive Check for possible overload. stationary near Motor M21 turning when a Check the Duplex Unit drive the Vertical copy is taken up and fed coupling, or replace PWB-A Transport Section.
Page 264: Wrinkles In Paper
2. Wrinkles in Paper Step Cause Check Item Result Action Paper Is the problem solved when Change the paper (that is up new paper is used? to product specifications). Instruct the user in how to store the paper. Paper Take-Up Is the paper taken up and Check the Drawer and Paper Section...
Page 265: Skewed Feed
4. Skewed Feed Step Cause Check Item Result Action Paper Is the problem solved when Change the paper (that is up new paper is used? to product specifications). Instruct the user in how to store the paper. Paper Is the Paper Take-Up Roll Clean or replace the Paper Take-Up Roll dirty, or has its replacement...
Page 266 MEMO T-34...
Page 267: Malfunctions
MALFUNCTIONS 1. Self-Diagnostic Function The copier CPU is capable of self-diagnosis of the copier conditions and, when detecting a malfunction, it shows the corresponding malfunction code across the Zoom Ratio Indicator and Multi-Copy Display. Each malfunction code indicates the particular part which has developed a malfunction and the type of malfunction.
Page 268 Copier/Paper Feed Cabinet (Option) Code Description Possible Cause • • C0400 Exposure Lamp’s failure LA1 out Defective PWB-A to turn ON • • Blown Exposure Lamp Defective Power Thermal Fuse TS2 Supply Unit PU1 • Defective AE Sensor • • C4100 Exposure Lamp turning Defective PWB-A...
Page 269 Copier/Paper Feed Cabinet (Option) Code Description Possible Cause • C0900 3rd Drawer Lift-Up Sensor Defective 3rd Drawer Lift-Up Sensor PC19 malfunction • Defective PWB-A (PF-201) • C0904 3rd Drawer Lift-Up Motor Defective 3rd Drawer Lift-Up Motor M24 malfunction • Defective PWB-A (PF-201) •...
Page 270 Malfunctions Detected by Copiers, Except Europe Code Description Possible Cause • C0F02 Original size detection Defective Original Size Detecting Board UN2 error (Defective CPU) • Defective PWB-A • C0FE2 Original Size Detecting Defective Original Size Detecting Board UN2 Sensor failure [Sensor (2)] •...
Page 271 Malfunctions for Other Options Code Description Possible Cause • C0b10 Faulty Paper Clamp Unit Paper Clamp Motor M2 movement • Paper Clamp Home Position Sensor PC6 • C0b11 Faulty Paper Clamp Unit Paper Clamp Motor M2 movement • Paper Clamp Home Position Sensor PC6 •...
Page 272: C0000: Main Drive Motor's Failure To Turn
1-1. C0000: Main Drive Motor’s failure to turn C0001: Main Drive Motor turning at abnormal timing Symbol Name PWB-A Main Drive Motor PWB-A Main Control Board 1139T018AA 1139C06TAA T-40...
Page 273 Step Check Item Result Action Is C0001 being shown? Begin with step 5. Does M2 start to turn when the Start Check rolls/rollers and gears for Key is pressed? possible overload. Does the voltage across PJ3A-4 on Replace PWB-A. PWB-A and GND change from DC5V to DC0V when the Start Key is pressed? Does the voltage across PJ3A-3 on...
Page 274: C0010: Pc Drive Motor's Failure To Turn
1-2. C0010: PC Drive Motor’s failure to turn C0011: PC Drive Motor turning at abnormal timing Symbol Name PWB-A PC Drive Motor PWB-A Main Control Board 1139T019AA 1139C07TAA T-42...
Page 275 Step Check Item Result Action Is C0011 being shown? Begin with step 5. Does M1 start to turn when the Start Check gears for possible overload. Key is pressed? Does the voltage across PJ3A-2 on Replace PWB-A. PWB-A and GND change from DC5V to DC0V when the Start Key is pressed? Does the voltage across PJ3A-1 on...
Page 276: C004C: Cooling Fan Motor's Failure To Turn
1-3. C004C: Cooling Fan Motor’s failure to turn C004E: Power Supply Unit Cooling Fan Motor’s failure to turn Symbol Name PWB-A Cooling Fan Motor Power Supply Unit Cooling Fan Motor PWB-A Main Control Board 1139T020AA 1139C08TAA T-44...
Page 277 C004C Step Check Item Result Action Is M9 turning at low speed when the Begin with step 3. Power Switch is in the ON position? Does the voltage across PJ10A-4 on Replace M9. PWB-A and GND change from DC12V Replace PWB-A. to DC24V when the Start Key is pressed? Is the voltage across PJ10A-4 on...
Page 278: C0070: Toner Replenishing Motor's Failure To Turn
1-4. C0070: Toner Replenishing Motor’s failure to turn C0071: Toner Replenishing Motor turning at abnormal timing Symbol Name PWB-A PC112 Toner Hopper Home Position Sensor Toner Replenishing Motor PWB-A Main Control Board PC112 1139T022AA 1139C09TAA T-46...
Page 279 Step Check Item Result Action Is C0071 being shown? Begin with step 3. Does the Toner Bottle turn when two or Perform step 3. three copies are made with the Original Perform step 4. Cover raised? Make two or three copies with the Replace PWB-A.
Page 280: C0400: Exposure Lamp's Failure To Turn On
1-5. C0400: Exposure Lamp’s failure to turn ON C0410: Exposure Lamp turning ON at abnormal timing Symbol Name PWB-A Exposure Lamp Exposure Lamp Thermal Fuse PWB-A Main Control Board PWB-H AE Sensor Board PWB-H Power Supply Unit 1139T023AA 1139C10TAA T-48...
Page 281 C0400 Step Check Item Result Action Does LA1 light up when the Start Key Check the photo receiver of the AE is pressed? Sensor for contamination. Replace PWB-H or PWB-A. Does the voltage across PJ2A-11 on Replace PWB-A. PWB-A and GND become DC4.3V or less when LA1 turns ON? Disconnect CN7 (2P).
Page 282: C0500: Warming-Up Failure
1-6. C0500: Warming-up failure C0510: Abnormally low fusing temperature C0520: Abnormally high fusing temperature Symbol Name PWB-A Fusing Heater Lamp CN5 (2P) Fusing Thermal Fuse Fusing Thermistor CN14 (4P) PWB-A Main Control Board 1139T013AA 1139C11TAA T-50...
Page 283 C0500, C0510 After resetting a C0510 condition, C0500 will be shown if the same problem recurs. For this reason, the same troubleshooting procedure is used for C0500 and C0510. Step Check Item Result Action Does H1 light up when the Power Check TH1 for installation or clean it.
Page 284 1-7. C0600: Scanner Motor malfunction C0610: Lens Motor malfunction C0620: Mirror Motor malfunction Symbol Name PWB-A PWB-E Scanner Motor Lens Motor Mirror Motor PC86 PC90 PC81 Scanner Reference Position PC81 Sensor PC86 Mirror Reference Position Sensor PC90 Lens Reference Position Sensor PWB-A Main Control Board PWB-E...
Page 285 C0600 Step Check Item Result Action Does the Scanner start moving after Perform step 3. the Power Switch has been turned ON? Does the voltage across PJ1A-3 on Replace PWB-E or M5. PWB-A and GND change from DC5V to DC0V after the Power Switch has Replace PWB-A.
Page 286 1-8. C0900: 3rd Drawer Lift-Up Sensor malfunction C0904: 3rd Drawer Lift-Up Motor malfunction C0950: 4th Drawer Lift-Up Sensor malfunction C0954: 4th Drawer Lift-Up Motor malfunction Symbol Name PC19 3rd Drawer Lift-Up Sensor PC23 4th Drawer Lift-Up Sensor PC27 3rd Drawer Lifting Motor Pulse Detection Sensor PC28 4th Drawer Lifting Motor Pulse...
Page 287 C0900, C0950 Step Check Item Result Action Is C0950 being shown? Perform step 3. Slide out the 3rd Drawer, go to the rear Replace PWB-A (PF-201). of the copier, and raise the 3rd Drawer Paper Take-Up Roll Retract Lever. Does the voltage across PJ9AA-12 on Check the retract mechanism and PWB-A (PF-201) and GND change PC19.
Page 288 1-9. C0d00: Duplex Unit Front/Rear Edge Guide Plates home position detection failure C0d20: Duplex Unit Trailing Gate Unit home position detection failure C0d50: Duplex Unit Drive Motor’s failure to turn C0d51: Duplex Unit Drive Motor turning at abnormal timing Symbol Name Duplex Gate Home Position Sensor...
Page 289 C0d00, C0d20 Step Check Item Result Action Is C0d20 being shown? Perform step 4. Does Front/Rear Edge Guide Drive Check for possible overload. Motor M33 start turning when the Power Switch is turned ON or the Replace PWB-G, PWB-A (PF-201) Duplex Unit slid into position? (PF-1D), or M33.
Page 290 1-10. C0F10: Faulty AE Sensor level C0F30: ATDC Sensor malfunction Symbol Name PWB-A PWB-A Main Control Board PWB-H AE Sensor Board ATDC Sensor PWB-H 1139T012AA 1139C18TAA T-58...
Page 291 C0F10 Step Check Item Result Action Is the voltage across PJ12A-3 on Replace PWB-A. PWB-A and GND in the range between Check the photo receiver of the AE DC2.5V and DC4.5V when the Start Sensor for contamination or replace Key is pressed in the F3 operation? PWB-H.
Page 292 1-11. C0F02: Original size detection error (Defective CPU) C0FE2 to C0FFF: Original Size Detecting Sensor failure Symbol Name PWB-A PC113 Original Size Detecting Sensor PC115 PC114 Original Size Detecting Sensor PC113 PC115 Original Size Detecting Sensor PC114 PC116 PC116 Original Size Detecting Sensor Original Size Detecting Board PWB-A Main Control Board...
Page 293 Step Check Item Result Action Is any code from among C0FE2 to Perform step 4. C0FFF being shown? Are jumper straps installed in the Change the strap position of J1 and J2. following position for J1 and J2 of UN2? J1: On the end not marked with "O"...
Page 294 2. Power is not Turned ON Symbol Name PWB-A PWB-A Main Control Board PWB-C Power Supply Board PWB-C DC Power Supply Unit Power Switch Front Door Interlock Switch Main Relay Fuse 1139T009AA 1139C19TAA T-62...
Page 295 Symptom Step Check Item Result Action Power is not Is the voltage across PJ1-1 Check F1 or line voltage. supplied to the and 3 of PU2 AC100V? copier at all. Is the voltage across PJ3-1 Check F1 of PU2 or replace of PU2 and GND, and PU2.
Page 296 3. E1, E2 Symbol Name ATDC Sensor PWB-A I/U Fuse PWB-A Main Control Board 1139T024AA 1139C20TAA T-64...
Page 297 Code Step Check Item Result Action Is the seal peeled off the opening Peel off the seal and turn the or starter been fully charged? Power Switch OFF, then ON. Is the voltage across PJ11A-5 on Replace PWB-A. PWB-A and GND in the range between DC0.5V and DC4.5V Replace the ATDC Sensor.
Page 298 Copyright 1993 MINOLTA CAMERA CO., LTD Printed in Japan Use of this manual should be strictly supervised to avoid disclosure of confidential information. 1139-7998-11 94043350 MINOLTA CAMERA CO., LTD. Printed in Japan...

Minolta EP1080 Service Manual

General, Mechanical/ Electrical

Mechanical/ Electrical

Dis/Reassembly, Adjustment

1 Service Instructions

2 Disassembly/Reassembly

3 Adjustment

4 Miscellaneous

Switches on Pwbs

PRECAUTIONS for HANDLING the Pwbs

FUNCTIONS of SWITCHES and OTHER PARTS on Pwbs

Tech. Rep. Program Mode

Adjust Mode

Troubleshooting

Quick Links

Chapters

Need help?

Questions and answers

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Summary of Contents for Minolta EP1080