Olivetti JP 90 Service Manual
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Olivetti JP 90 Service Manual

Olivetti JP 90 Service Manual

Olivetti jp 90 inkjet printer service manual
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  • Page 2 PUBLICATION ISSUED BY: Olivetti Lexikon, S.p.A. Documentation 77, Via Jervis - 10015 Ivrea (Italy) Copyright © 1996, Olivetti All rights reserved TRADEMARKS CENTRONICS is a trademark of Centronics Data Computer Corporation. EPSON and LQ 850 are trademarks of Epson Seiko Corporation.
  • Page 3 PREFACE This Service Manual gives the mechanical and electronic information needed to service the JP 90 ink-jet printer. Refer to this manual only if the failure has not been corrected after following the troubleshooting steps explained in the User's Guide.

  • Page 5: Table Of Contents

    GUIDE POWER ON DIAGNOSTICS MONOCHROME PRINT TEST DATASCOPE PRINTING (HEX DUMP) TROUBLESHOOTING GUIDE ELECTRICAL CONNECTIONS MAJOR COMPONENTS ON THE XP28 CPU BOARD POWER SUPPLY CIRCUIT CONNECTOR SIGNALS MAINTENANCE CLEANING THE PRINT HEAD AN NOZZLES JP 90 - Service Manual 681640J...
  • Page 6 DISASSEMBLY/REASSEMBLY PROCEDURES PRELIMINARY WARNINGS PRINTER CASING ASF ASSEMBLY INTAKE UNIT PAPER FEED SHAFT MAIN BOARD 8-10 8.7 PAPER FEED MOTOR 8-11 8.8 BELT AND PRINT HEAD CARRIAGE 8-14 8.9 CARRIAGE MOTOR 8-15 8.10 PAPER DETECTION PHOTOSENSOR 8-16 8.11 CONSOLE 681640J...

  • Page 7: Overview

    OVERVIEW 1.1 MAJOR CHARACTERISTICS The JP 90 is an ink-jet printer that offers a high degree of reliability, an outstanding print quality and runs runs very quietly. Fig.1-1 JP 90 Printer Technical and Functional Characteristics of the Basic Machine Print head: Bubble ink-jet with replaceable ink cartridge.

  • Page 8: General Block Diagram

    1.2 GENERAL BLOCK DIAGRAM ERGONOMICAL INTERFACE ERGONOMICAL INTERFACE ERGONOMICAL INTERFACE ERGONOMICAL INTERFACE ERGONOMICAL INTERFACE POWER SUPPLY: POWER SUPPLY: POWER SUPPLY: POWER SUPPLY: POWER SUPPLY: CABLE CABLE CABLE CABLE CABLE - - - - - ALI SOUTH AFRICA SOUTH AFRICA ALI 009 009 SOUTH AFRICA SOUTH AFRICA SOUTH AFRICA...

  • Page 9: Locating The Functional Components

    Top cover Paper support Front cover Head transport carriage Sliding paper guide AC/DC power socket Parallel interface connector Extractable battery holder/Battery pack compartment Paper feed motor Suction assembly Head transport carriage motor ASF assembly 681640J JP 90 - Service Manual...

  • Page 10: Firmware And Character Generators

    Deskjet 500 (PCL III +), IBM Proprinter X24 and EPSON LQ 850 printers, with all the related character generators. The JP 90 selectes between these emulations via software. Character Generator: The character generator assigns a specific printable character to each code in the graphic set.
  • Page 11 10 / 12 / 15 / 17.14 / 20 Serif italic Proportional Sans Serif 10 / 12 / 15 / 17.14 / 20 Sans Serif Proportional Sans Serif italic 10 / 12 / 15 / 17.14 / 20 Sans Serif italic Proportional 681640J JP 90 - Service Manual...

  • Page 12: Options

    1.5 OPTIONS All the options can be installed directly by the user by following the instructions provided in the individual packagings. BATTERY PACK (BP 50/6 - BP 50/12) As an alternative to using the AC/DC power supply and mains voltage, or batteries, the printer can also be powered by a battery pack.

  • Page 13: Ink-Jet Print Head Operation

    SUPPORT PLATE 140-150µm INK PAD HEATING ELEMENT - NOZZLE PAD COVER FLEXIBLE ELECTRIC GRID OUT OF INK SENSOR SUPPORT PLATE SPONGE Fig. 1-3c - EXPLODED VIEW SHELL OF THE PRINT HEAD Fig.1-3 Ink-Jet Print Head 681640J JP 90 - Service Manual...
  • Page 14 Ink-Jet Printing: Each nozzle expels an ink bubble whenever an electrical signal is applied to the corresponding resistive heating element for a few microseconds. The small amount of ink that comes into contact with the resistive heating element the moment the electrical signal is applied boils and begins to vaporize thus creating an ink bubble.
  • Page 15 1-5. The matrix also includes: Dampning/balancing nozzles A,C and B,D for the outermost 2, 50 and 1, 49 nozzles. Ink cartridge balancing nozzles E and L. (4.23 mm) Fig.1-5 Nozzle Matrix 681640J JP 90 - Service Manual...
  • Page 16 Information on the Heating Element's Activation Circuitry The heating elements are divided into four groups. Two groups have 12 elements, the other two groups have 13. Only one element can be activated at each time in each group, and therefore no more than four elements can be activated simultaneously.

  • Page 17: Color Ink-Jet Print Head Operation

    After a print job, tightly seal the nozzle bay so the nozzles are protected against dust and to avoid the inlk from drying-out when exposed for a certain period of time. Since on the JP 90 this operation is carried out automatically after a few minutes of printer inactivity, wait a few seconds before powering off the machine after a print job.
  • Page 18 Fig. 1-7a - COLOR INK-JET PRINT HEAD + CARTRIDGE NOZZLE 50µ µ µ µ µ m HEATING ELEMENT - NOZZLE PAD Fig. 1-7b - NOZZLE CROSS SECTION 140-150µ µ µ µ µ m HEATING ELEMENT FLEXIBLE ELECTRIC GRID INK CARTRIDGE INK SPONGES SHELL Fig.
  • Page 19 Higher voltages, on the other hand, can cause the generation of incorrect ink bubble control commands or no command at all due to the possible deterioration of the heating element. 1-13 681640J JP 90 - Service Manual...
  • Page 20 Since on the JP 90 this operation is carried out automatically after a few seconds of printer inactivity, wait a few seconds before powering off the machine after a print job.

  • Page 21: Operating Commands

    OPERATING COMMANDS 2.1 CONSOLE The console on the JP 90 has four keys and four LEDs. Fig. 2-1 Console The console keys allow you to select paper handling, the print quality and to switch the printer ON or OFF LINE.
  • Page 22 LED Functions The table below gives the meaning of the LED signals. MEANING POWER ON LINE FORM FEED CARTRIDGE Printer not powered on Printer powered and ONLINE Printer powered and OFFLINE Battery pack or batteries nearly low Low battery pack charge Data reception Out of paper condition Out of ink condition...
  • Page 23 POWER key followed by the CARTRIDGE key automatically CARTRIDGE activates the print test. ON LINE Pressing these two keys simultaneously for more than four seconds automatically prints the demo page. CARTRIDGE 681640J JP 90 - Service Manual...

  • Page 25: Installation

    The following rules need to be followed to ensure optimum printer performance and to avoid making service calls for problems that do not directly involve the printer: Line Voltage Supply The JP 90 complies with the safety, ergonomy and radio frequency disturbance (EMI) norms drawn up by the following commissions: Safety:...

  • Page 26: Unpacking The Printer

    3.2 UNPACKING THE PRINTER Checking the Box Contents The basic printer is shipped in a single box containing the following components in addition to the User's Guide: The JP 90 printer (A) AC/DC adapter (B) Print head (C) Print driver diskettes (D).

  • Page 27: Installing The Print Head

    Holding the print head by its outter shell, remove the protective seal from the nozzles. Fig. 3-4 Removing the Protective Seal Power on the printer. Press the CARTRIDGE button in order to move the print head carriage to its installation position. Lift the printer's front cover. 681640J JP 90 - Service Manual...
  • Page 28 Direct the print head electrical contacts towards the corresponding contacts on the carriage. Fig. 3-5 Positioning the Print Head Insert the print head into its slot by pushing it downwards until it snaps into place. Fig. 3-6 Inserting the Print Head Close the front cover.

  • Page 29: Inserting The Batteries

    The batteries need to be either replaced or recharged all at once. If the POWER LED begins to flash slowly, another five pages can be printed. If this LED begins to flash rapidly, the batteries are low and therefore need to be replaced. 681640J JP 90 - Service Manual...

  • Page 30: Inserting The Battery Pack

    3.6 INSERTING THE BATTERY PACK The battery pack can be used as an alternative to the AC/DC adapter and batteries. Two battery packs can be used: a 12 Volt 600 mAh Ni-Cd battery pack granting an operating autonomy of approximately 80 pages; a 12 Volt 1 Ah Ni-MH battery pack granting an operating autonomy of approximately 140 pages.

  • Page 31: Loading Paper

    Press FORM FEED again to expel the sheet of paper into the collection tray. Fig. 3-11 Paper Loading Test When the printer receives a text to be printed, a sheet of paper will be automatically loaded to the first print line. 681640J JP 90 - Service Manual...
  • Page 32 Printing the Demo Page With the printer powered on, the print head installed and paper loaded: Press and hold down the ON LINE and CARTRIDGE keys simultaneously for at least four seconds. A sheet of paper is automatically fed into the printer and the demo page is automatically printed. Do not open the printer's top cover during printing as this could cause a paper jam.

  • Page 33: Print Test

    Note : If the personal computer is powered off while the printer is still on, the printer will automatically reset itself. If the printer is powered off during the reset phase, the print head may stop outside its parking position. It is therefore suggested to power off the printer before the personal computer. 681640J JP 90 - Service Manual...

  • Page 35: Software Installation And Usage

    Print quality: LQ, Economy, Draft. Reticulation: defines the color mixtures (defult setting: Thick). Intensity control: increases/decreases the clearness of grapical images (default setting: Normal). The Reticulation and Intensity Control parameters are only active when monochrome-generated files are printed. 681640J JP 90 - Service Manual...

  • Page 36: The Dos Environment

    Fonts Scalable and/or TrueType fonts are avaulable with the Microsoft Windows 3.1 driver or later. Printing can be obtained with the Windows TrueType fonts or with the Portrait fonts residing in the printer (the printer's Landscape fonts cannot be used under Windows). Print Quality Combines speed and quality.

  • Page 37: Autodiagnostics, Testing Procedures And Troubleshooting Guide

    With the machine powered off, press the POWER and CARTRIDGE keys simultaneously; then release the POWER key first followed by the CARTRIDGE key. The printer will load paper and print the print test shown on the next page, on up to three sheets of paper. 681640J JP 90 - Service Manual...

  • Page 38: Datascope Printing (Hex Dump)

    5.3 DATA SCOPE PRINTING (HEX DUMP) To make sure that the command codes sent from the system are received correctly, this feature prints the corresponding ASCII code (hexadecimal) of all the characters that are input into the printer. With the printer powered off, press the POWER and FORM FEED keys simultaneously; release then the POWER key first followed by the FORM FEED key.

  • Page 39: Troubleshooting Guide

    Paper movement is controlled by a stepper motor. If the paper is not loaded in the printer, check the mechanisms that transfer motion from the motor to the paper feed rollers. If the problem persists check the motor cabling. Replace the XP28 CPU board as last resort. 681640J JP 90 - Service Manual...
  • Page 40 Paper or other obstructions along the paper path can cause paper jams or irregular paper feeds. To aviod paper jams it is suggested tha you load paper in the ASF only when it is empty. When loading new paper in the ASF or after removing a jammed piece of paper, always remove the sheets already present in the ASF and then reload the entire block again.

  • Page 41: Electrical Connections

    IC12 5 volt regulator IC13 Paper feed motor driver IC14 Out of ink/Head type IC15 Head driver IC16 Had driver IC17 EEPROM 8-way latch IC19 ROM/RAM chip enable F2A fuse XT1 32 MHz quartz 681640J JP 90 - Service Manual...

  • Page 42: Power Supply Circuit

    6.2 POWER SUPPLY CIRCUIT 681640J...

  • Page 43: Connector Signals

    26 GND PARALLEL CD 7 27 GND INTERFACE NACK 28 GND BUSY 29 GND 30 GND ONLINE 13 31 INIT AUTOFD 14 32 NERROR 33 GND 36 BYNSI INKLEVEL INKTEST COD2 THERM PRINT HEAD 681640J JP 90 - Service Manual...
  • Page 44 XP28 CPU BOARD PAPER SENSOR POWER SUPPLY +BATT +BATT -BATT TEMP CONSOLE POWER LED POWER KEY ONLINE LED FORM F.LED ONLINE KEY PAPER KEY CARTR KEY CARTR LED Note (*) Signal indicating the presence of paper at the beginning of the line 681640J...

  • Page 45: Maintenance

    Reinsert the print head back into the printer and run a print test for a quality check. Note: The cleaning of the nozzles must not be systematically repeated since it damages the print head; this operation must only be carried out as last resort before replacing the print head. 681640J JP 90 - Service Manual...

  • Page 47: Preliminary Warnings

    NO ADJUSTMENTS NEED TO BE MADE TO THE PARTS AFTER THEIR DISASSEMBLY/ REASSEMBLY. TO REASSEMBLE THE PARTS FOLLOW THEIR DISASSEMBLY PROCEDURES IN REVERSE ORDER. MAKE SURE ALL THE CONNECTORS ARE FITTED PROPERLY WHEN FINISHED, TEST THE PRINTER TO MAKE SURE THAT THE FAULT IS CORRECTED. 681640J JP 90 - Service Manual...
  • Page 48 8.2 DISASSEMBLY/REASSEMBLY OF THE PRINTER CASING Push the printer casing outwards and free it from the three clasps (1). Release clasp (2) by pushing it outwards. 681640J...
  • Page 49 Release the casing from the three clasps (3) by pusing it inwards. Release the console (4) and remove the casing. 681640J JP 90 - Service Manual...
  • Page 50 8.3 DISASSEMBLY/REASSEMBLY OF THE ASF ASSEMBLY Remove the printer casing. Push the paper feed unit sideways and release it by lifting upwards. From the other side, free the ASF by lifting it upwards and then forwards, being careful to avoid touching the paper detection photosensor (S).
  • Page 51 From the rear of the printer, unhook the two clasps (1). Remove the ASF by sliding it upwards, out of the printer. 681640J JP 90 - Service Manual...
  • Page 52 Note: When refitting the ASF, insert the two gears so that the two reference marks (T) are correctly positioned. Also make sure that slot (V) hooks properly onto stud (P). 681640J...
  • Page 53 8.4 DISASSEMBLY/REASSEMBLY OF THE INTAKE UNIT Remove the printer casing. Release the paper feed assembly. Insert a screwdriver on the left-hand side of the printer and unhook the intake unit. Then remove this unit. 681640J JP 90 - Service Manual...
  • Page 54 8.5 DISASSEMBLY/REASSEMBLY OF THE PAPER FEED SHAFT Remove the printer casing. Release the paper feed assembly. Remove the ASF. Remove the intake unit. Using a screwdriver, slide the bushing studs on both sides from their slots. Turn the bushings and remove the shaft. 681640J...
  • Page 55 8.6 DISASSEMBLY/REASSEMBLY OF THE MAIN BOARD Turn the printer up-side down. Insert the screwdriver in slots (F) and release the cover Remove screw (V). Release the sever clasps (G). 681640J JP 90 - Service Manual...
  • Page 56 Detach all connectors. 8.7 DISASSEMBLY/REASSEMBLY OF THE PAPER FEED MOTOR Remove the printer casing. Remove the paper feed assembly. Remove the intake unit. Remove the motor after releasing it from the side panel. 8-10 681640J...
  • Page 57 8.8 DISASSEMBLY/REASSEMBLY OF THE BELT AND THE PRINT HEAD CARRIAGE Remove the printer casing. Release the paper feed assembly. From the right-hand side of the printer, push the pulley inwards and free the belt. 8-11 681640J JP 90 - Service Manual...
  • Page 58 New free the belt from the pulley on the left-hand side. Remove the shaft by sliding it upwards. 8-12 681640J...
  • Page 59 Remove the main board. Detach connectors (1) Move hooks (2) to release the flat cable from the print head. Slide off the guide of the flat cable. 8-13 681640J JP 90 - Service Manual...
  • Page 60 8.9 DISASSEMBLY/REASSEMBLY OF THE CARRIAGE MOTOR Remove the printer casing. Remove the belt and the print head carriage. Remove the main board. Detach connector (1) Move clasp (2) to free and remove the carriage motor. 8-14 681640J...
  • Page 61 8.10 DISASSEMBLY/REASSEMBLY OF THE PAPER DETECTION PHOTOSENSOR Remove the printer casing. Free the paper feed assembly. Free the paper detection photosensor (1) from its slot. Remove the main board. Detach connector (2). 8-15 681640J JP 90 - Service Manual...
  • Page 62 8.11 DISASSEMBLY/REASSEMBLY OF THE CONSOLE Remove the printer casing. Remove the main board. Detach connector (1) 8-16 681640J...
  • Page 63 UPDA A A A A TING ST TING ST TING ST TING STA A A A A TUS TING ST DATE UPDATED PAGES PAGES CODE 10/1996 EDITION 681640J-00...

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