Toshiba TLP-781U Service Manual
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Toshiba TLP-781U Service Manual

3lcd data projector
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FILE NO. 330-200102
SUPPLEMENT
SERVICE MANUAL
3LCD DATA PROJECTOR
TLP-781U/780U
TLP-781E/780E
TLP-781C/780C

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  • Page 1 FILE NO. 330-200102 SUPPLEMENT SERVICE MANUAL 3LCD DATA PROJECTOR TLP-781U/780U TLP-781E/780E TLP-781C/780C...

  • Page 2: Safety Precaution

    SAFETY PRECAUTION WARNING: Service should not be attempted by anyone unfamiliar with the necessary precautions on this projector. The following are the necessary precautions to be observed before servicing this chassis. 1. An isolation Transformer should be connected in the power line between the projector and the AC Iine before any service is performed on the projector.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS SAFETY PRECAUTIONS ........0-4 IMPORTANT PRECAUTIONS ......0-4 IMPORTANT SAFETY INSTRUCTION ....0-5 SECTION 1 PART REPLACEMENT AND ADJUSTMENT PROCEDURES 1. LOCATION OF MAIN PARTS ......1-1 3-12. Exhaust Fan ..........1-21 2. LOCATION OF PC BOARD ......... 1-1 3-13.

  • Page 4: Safety Precautions

    WARNING: Changes or modifications made to this equipment, not expressly approved by The exclamation point within an Toshiba, or parties authorized by Toshiba, could void the user's authority to operate equilateral triangle is intended to the equipment. alert the user to the presence of...

  • Page 5: Important Safety Instruction

    IMPORTANT SAFETY INSTRUCTIONS CAUTION: PLEASE READ AND OBSERVE ALL WARNINGS AND INSTRUCTIONS GIVEN IN OWNER'S MANUAL AND THOSE MARKED ON THE UNIT. RETAIN THIS BOOKLET FOR FUTURE REFERENCE. This set has been designed and manufactured to assure personal safety. Improper use can result in electric shock or fire hazard.
  • Page 6 IMPORTANT SAFETY INSTRUCTIONS (continued) 11. Object and Liquid Entry 7. Cleaning Never push objects of any kind into this product Unplug this product from the wall outlet before cleaning. Do not use liquid cleaners or aerosol through openings as they may touch dangerous cleaners.
  • Page 7 IMPORTANT SAFETY INSTRUCTIONS (continued) 18. Servicing 15. Accessories Do not attempt to service this product yourself as Do not place this product on an unstable cart, stand, tripod, bracket, or table. The product may opening or removing covers may expose you to fall, causing serious injury to a child or adult, and dangerous voltage or other hazards.
  • Page 8 IMPORTANT SAFETY INSTRUCTIONS (continued) 23. Do not leave documents on the unit for long periods of time while using the document imaging function. Do not leave texts, papers or other documents for projection on the unit for long periods of time. The heat could erase the letters on a thermal paper.

  • Page 9: Part Replacement And Adjustment Procedures

    SECTION 1 PART REPLACEMENT AND ADJUSTMENT PROCEDURES 1. LOCATION OF MAIN PARTS P850: BALLAST POWER SUPPLY P800: POWER SUPPLY TICAL ENGINE SPEAKER BLOCK LCD BLOCK LAMP HOUSING Z101: EXHAUST FAN Z102: INTAKE FAN 1 Z100: INT E230: PROJECTION LENS 2. LOCATION OF PC BOARD E106: KEY PC BOARD E105: FAN PC BOARD E101: MAIN PC BOARD...

  • Page 10: Replacement Of Mechanical Parts

    CAUTIONS BEFORE SERVICING Electronic parts are susceptible to static electricity and may easily be damaged, so do not forget to take proper grounding treatment as required. Many screws are used inside the unit. To prevent missing, dropping, etc. of the screws, always use a magnetized screwdriver in servicing.

  • Page 11: Top Cover

    3-2. Top Cover Step Figure Explanation [Left Side] Remove 3 screws (M3 x 6). Screw : type [M-1] [Right Side] Remove 5 screws (M3 x 6). Screw : type [M-1] [Note] Remove connector cover. [Front] Remove 3 screws (2 x 4). Screw : type [M-2] Remove front cover.
  • Page 12 3-2. Top Cover (Continued) Step Figure Explanation [Rear] Remove 3 screws (M2 x 5). Screw : type [M-3] Remove rear cover. [Note] Unsnap the bottom first, and then unsnap the top. [Rear] Remove 1 screw (M3 x 6). Screw : type [M-1] Disconnect the key board cable (yellow).

  • Page 13: Main Pc Board

    3-3. Main PC Board Step Figure Explanation Remove all cables and connectors. Remove 6 screws (M3 x 6). Screw : type [M-1] Remove 1 screws (M3 x 6). Screw : type [M-1] [Note] The screw here is also fixing the grand wire.

  • Page 14: Drive Pc Board

    3-4. Drive PC Board Step Figure Explanation Remove all cables and connectors. Remove 4 screws (M3 x 6). Screw : type [M-1] [Note] The screw here is also fixing the grand plate and grand wire. [Note] The screw here is also fixing the grand wire.

  • Page 15: Power Supply

    3-5. Power Supply Step Figure Explanation Remove 3 screw (3 x 8). Screw : type [M-4] Disconnect the power cable(Black) and ballast cable(Red) from the lamp housing. Remove 1 screw (3 x 8). Screw : type [M-4] Remove 2 screws (a:3 x 8 , b:M3 x 6). Screw a : type [M-4] Screw b : type [M-1] Remove 1 hook from the bottom cabinet in the direction of...

  • Page 16: Ballast Power Supply

    3-6. Ballast power Supply Step Figure Explanation Disconnect the cable from the ballast power supply. (Plastic case is opened) Release 4 P.C. board holder by using tweezers.

  • Page 17: Optical Engine

    3-7. Optical Engine Step Figure Explanation Remove 1 screw (3 x 8)..(1) Screw : type [M-3] Remove 1 screw (3 x 6)..(2) Screw : type [M-3] Remove 4 screws (3 x 12)..(a)-(d) Screw : type [M-4] Remove 1 screw (3 x6)..(e) Screw : type [M-3] Enlargement (a) Enlargement (b), (e)
  • Page 18 3-7. Optical Engine (Continued) Step Figure Explanation Enlargement (d) 1-10...

  • Page 19: Lcd Panel

    3-8. LCD Panel Step Figure Explanation Remove 3 screws (M3 x 8SW) . Screw : type [E-1] [Note] Tear off adhesive tape when you remove the screw of (A). Sub frame Separate the main frame and sub frame from the engine block.
  • Page 20 3-8. LCD Panel (Continued) Step Figure Explanation Remove 3 screws (M3 x 8SW) . Screw : type [E-1] Separate the prism block from the main frame. Prism block Remove the sheeld plate from the prism block. Remove 4 screws (M2.6 x 6). Screw : type [E-3] 1-12...
  • Page 21 3-8. LCD Panel (Continued) Step Figure Explanation Separate the LCD panel, mask and bracket. Note] Keep the mask because it is used again. The old LCD Panel and four screws are not used. Remove 1 screws (M2 x 4) and remove the polarized plate holder.
  • Page 22 3-8. LCD Panel (Continued) Step Figure Explanation Use the panel holder Install a new panel with 4 screws. [Note] There are 2 kinds of types of the screw. (A) Side Screw : type [E-5] (B) Side Screw : type [E-6] 4 screws use for temporary tightening.
  • Page 23 3-8. LCD Panel (Continued) Step Figure Explanation Install the LCD panel holder assembly made by step 9 to the prism block. Fix the LCD panel holder assembly on the bracket with 2 screws (M2x2). Screw : type [ E-7] Fix a prism block on the lens block. [Note] Panel holder service kit (23405058) E-5 E-6 1-15...

  • Page 24: Multi-Pbs (Polarizing Beam Splitter)

    3-9. MULTI-PBS (Polarizing Beam Splitter) Step Figure Explanation Remove 4 screws (M2.5 x 8SW) . Screw : type [E-8] Remove the fitting spring from the the gap. Remove the Multi-PBS. [Note] Make sure the direction of the PBS when you install. TOP VIEW Lamp Lamp...

  • Page 25: Polarized Plate

    3-10. Polarized Plate Step Figure Explanation Remve the one screw. Remove the stopper. Remove the holder and polarized plate. Panel Side polarizer film polarizer film polarizer film [Note] The film side must be faced to the LCD panel when installing and the color must be related with the color of LCD panel.
  • Page 26 3-10. Polarized Plate (Continued) Step Figure Explanation Remve the one screw. Remove the stopper. Remove the polarized plate. Panel Side polarizer film polarizer film polarizer film [Note] The film side must be faced to the LCD panel when installing and the color must be related with the color of LCD panel. Color Marking 1-18...

  • Page 27: Intake Fan

    3-11. Intake Fan Step Figure Explanation Remove 1 screw (3 x 8). Screw : type [M-4] Remove intake fan block from the bottom cabinet.( It pulls up along with a rail. ) Rail Fan block Remove filter block from the intake fan block. The filter is split like this.
  • Page 28 3-11. Intake Fan (Continued) Step Figure Explanation The intake fan block is divided into the fan, senser pcb, and bracket. Remove 3 screws (3 x 8). Screw : type [M-4] The cooling fan block is divided into the plate, fan, piece, and bracket.

  • Page 29: Exhaust Fan

    3-12. Exhaust Fan Step Figure Explanation Remove 2 screws (3 x 8). Screw : type [M-4] Remove 2 screws (3 x 8 black). Screw : type [M-8] 3-13. Speaker Block Step Figure Explanation Remove 2 screws (3 x 8). Screw : type [M-4] Remove 1 screws (3 x 8).

  • Page 30: Video/Audio Pc Board

    3-14. Video/Audio PC Board Step Figure Explanation Remove 6 screws (3 x 8). Screw : type [M-4] [Note] The screw here is also fixing the grand wire.(Green marked) [Note] The safety interlock switch is pushed when the lamp cover is replaced.

  • Page 31: Document Camera

    3-15. Document camera (How to remove from the main body) Step Figure Explanation Remove 5 screws (M3 x 6). Screw : type [M-1] [Note] Please remove the screw (A) last. Then, support the camera block by hand, otherwise it falls. Disconnect the connector from the main body.
  • Page 32 3-16. Screws for Mechanical Patrs Type Form Size Location Top Cover (11), Main PCB (7), Drive PCB (5), Ballast Power Supply (1), Video/audio PCB (5) and M3 x 6 Lamp House (1) Front Cover (3) 2 x 4 Rear Cover (3) 2 x 4 Power Supply (1), Ballast Power Supply (2), Ballast cable connector (1), Intake FAN (1),...

  • Page 33: Screws For Optical Engine

    3-17. Screws for Optical Engine Type Form Size Location LCD PANEL (3) M3 x 8SW Power Supply (1) M3 x 6SW LCD PANEL (4) M2.5 x 6 * This screw will not use again. Bracket (4) M2 x 4 LCD Panel (connector side) (2) M2.5 x 6 *Contained in Panel holder kit.

  • Page 34: How To Disconnect Ffc/Fpc Connector

    3-18. How to disconnect FFC/FPC Connector (1) Step Figure Explanation Conformity of Location number. MAIN PCB: PJ701 Hook Release Two hooks. [Note] Hooks stop on the way. Please do not pull out by superfluous power.) Electrodes (up side) Electrodes (up side) Electrodes (up side) FFC/FPC cable can be disconnected.
  • Page 35 3-18. How to disconnect FFC/FPC Connector (2) Step Figure Explanation Conformity of Location number. MAIN PCB: PJ203,PJ206,PJ207,PJ208 DRIVE PCB: PJ701,PJ851,PJ901,PJ951 FANDRIVE PCB: PJ2,PJ3,PJ5 Hook cover Release hook cover. Release Hook cover Side view Lock Connector Cable [Note] Hook cover stops on the way. Please do not pull out by superfluous power.
  • Page 36 3-18. How to disconnect FFC/FPC Connector (3) Step Figure Explanation Conformity of Location number. VIDEO/AUDIO PCB: PJ401, PJ403 Hook Release hook. Release Hook Cable Side view Lock Connector [Note] Hook cover stops on the way. Please do not pull out by superfluous power.

  • Page 37: Optical Adjustment

    4. OPTICAL ADJUSTMENT (5) Connect Main PC board by using extension cable kit 4-1. Preparation Be careful not to touch circuit and cabinet. < Test Equipments and Test Jigs > Personal computer (Windows P/C, OS:windows 95/98) PJ201 : Exchange 9pin long cable. Adjustment software SINGO98.exe PJ202 : Extend using 3pin cable.
  • Page 38 (7) Focus Adjustment When this screw (A) is loosened, the panel moves to front and back, and focus can be adjusted. When these screws (B) are loosened, the panel moves to left,right,up and down, and convergence can be adjusted. 1-30...

  • Page 39: Adjustment Of Focus

    4-2. Adjustment of Focus (ex. Red panel exchange) Step Figure Explanation TEST PATTERN : Green Cross Hatch Adjust focus by projection Lens. TEST PATTERN : Red Cross Hatch Move the panel in front and back, and adjust the focus. Tighten two screws little by little. Tighten two screws, when you reached to the best focus point.
  • Page 40 4-2. Adjustment of Focus (ex. Red panel exchange) (Continued) Step Figure Explanation TEST PATTERN : Red and Green Cross Hatch Move the panel in left, right, up and down, and adjust the convergence. Tighten four screws. 1-32...

  • Page 41: Electrical Adjustment

    5. ELECTRICAL ADJUSTMENT 5-1. Preparation (2) Shading adjustment software < Test Equipments and Jigs > When the shading adjustment software Personal computer (Windows P/C, OS:windows 95/98) (FieldAdjust.exe) is started, screen like the following Adjustment software image (Fig. 1-4-2) appears. (SINGO98.exe, FieldAdjust.exe) RGB cable, Serial control cable (for RS-232C) <...

  • Page 42: Shading Adjustment Software

    1-2 Save the original shading data to PC 5-2. Shading adjustment software (1) Select [Save] from [File] menu. 1. When DRIVE PCB is exchanged. Step1. Get shading data from old Drive PCB. Step2. Save the data to PC memory. Step3. Exchange the Drive PCB. Step4.
  • Page 43 (2) Press [Yes] button. 2. When LCD Panels are exchanged. Step1. Adjust the VCOM data (front and celing) . This adjustment makes the flicker of a panel into the minimum. Step2. Adjust the Shading data. Step3. Set the new data to the Projector. 2-1 Adjust the VCOM data (1) Select [Built in Signal] from [Check] menu.
  • Page 44 (4) Select [Front] button first, and select R,G or B (8) Change the internal signal patern. button. Set the white level 50% and press [OK] button. (When you adjust the R level, then select R-VCOM (9) Select [Front] button, and select [NRSH] button. (5) Push [+1] or [-1] button, change data and look for the point with which a flicker serves as the minimum.
  • Page 45 2-2 Adjust the shading data Note: (1) Select adjusting color (Red/Green/Blue) You must change the builtin signal level corresponding form the [Setting] menu. to the chosen level. Max : 60% Mid1 : 40% Mid2 : 25% Min : 10% Example: If you select [Mid1], set the builtin signal level 40%.
  • Page 46 2-3 Set the shading data to the projector (5) Select [Set] from the [Projector] menu. (1) Select [Data Save] form the [Projector] menu. (6) After sending the all data, the following mesage (2) Push [Save] button. appired. Click the [OK] button. (7) The same adjustment is made in othe colors and each four levels.

  • Page 47: Servicing Diagrams

    SECTION 2 SERVICING DIAGRAMS 1. TROUBLE SHOOTING CAUSE CHECK POINT CHEK ITEM JUDGE (NG) → Power supply is NG. Flat cable of Power supply Standby voltage (disconnect PJ1) (See page 2-4) (OK) → Check next step. Power is not on (NG) →...
  • Page 48 2. LED DISPLAY (Problems Shown on LED Indicator Combination) Status of Indicator Light Error Cord Cause and Trouble Solution TEMP LAMP Check the power unit. Standby-power is not on > There's a problem with the Check the connector. power unit or system (OFF) (OFF) (OFF)

  • Page 49: Wiring Block Diagram

    3. WIRING BLOCK DIAGRAM LED PC BOARD CAMERA PC BOARD PJ401 PJ40 3 VIDOE/AUDIO PC BOARD KEY PC BOARD PJ 3 03 PJ 3 02 PJ 2 04 PJ 2 05 PJ 5 PJ 2 03 PJ 3 01 MAIN PC BOARD PJ 2 10 PJ 2 02 PJ 2 01...

  • Page 50: Connector Pin Assignment

    4. CONNECTOR PIN ASSIGNMENT PJ1 (MAIN) POWER SUPPLY(CN201) 46 +17V +17V 47 +17V +17V 1 +4.5V +4.5V 48 +17V +17V 2 +4.5V +4.5V 49 +17V +17V 3 +4.5V +4.5V 50 +17V +17V 4 +4.5V +4.5V 5 GND PJ3 (MAIN) PJ207 (MAIN) 6 GND 7 GND 1 PWS5V_SDA...
  • Page 51 PJ8 (FAN) PBS FAN 26 CAM KEY2 27 CAM REM 1 FAN2 CONTROL V +6V to 12V 28 CAM KEY3 2 GND 29 CAM KEY5 3 FAN2 PULSE +3.3V(PULSE) 30 CAM KEY4 PJ9 (FAN) EXHAUST FAN PJ206(MAIN) PJ701(DRIVE) 1 FAN3 CONTROL V +6V to 12V 1 GND 2 GND...
  • Page 52 PJ303 (RELAY) CAMERA UNIT PJ303 (RELAY) CAMERA UNIT 1 +15V +15V 1 +15V +15V 2 GND 2 GND 3 +4V +4V(PULSE) 3 +4V +4V(PULSE) 4 GND 4 GND 5 -8V 5 -8V 6 CAM Rx +/- 7V (data) 6 CAM Rx +/- 7V (data) 7 CAM Tx +/- 7V (data)

  • Page 53: Parts List

    SECTION 3 PARTS LIST SAFETY PRECAUTION Replace only with part number specified. The mounting position of replacement is to be identical with originals. The substitute replacement parts which do not have the same safety characteristics as specified in the parts list may create shock, fire or other hazards.
  • Page 54 1-2. Packing Assembly Y115 : 23448621 SOFT CASE A410 : 23918309 A403 : 23946297 PARTITION PACKING (L) A403 : 23946297 PACKING (R) A280 : 23890937 LENS CAP A400 : 23064683 CARTON BOX A401: CARTON BOX LABEL ( see 3-9 )
  • Page 55 1-3. Accessories FORM PARTS NO FORM PARTS NO 23368750 Y250 23306393 Y102 RGB cable Y250 23306447 23368796 (E/C) Y104 USB cable Y251 23101988 23368798 Y105 Audio cable for Y200 23062007 Computer Y201 23555440 23368676A U-EF Y201 23565450 Y106 E-EG Control cable Y201 23565452 (RS-232C)
  • Page 56 1-4. Chassis Assembly A270 : 23540990 CONNECTOR COVER A100 : 23540984 TOP COVER Z102 : 23125891 INTACK FAN 1 B160 : 23528184 INTAKE FAN HOLDER A232 : 23541089 AIR FILTER HOLDER P200 : 23351184 SPEAKER A201 : 23436779 Z100 : 23125894 A250 : 23450458 HANDLE INTACK FAN 2...
  • Page 57 1-5. PC Board and Power Unit Assembly E106 : 23771065 P.C.B, KEY E105 : 23771064 P.C.B, FAN E101 : 23771060 P.C.B, MAIN E102 : 23771061 P.C.B, DRIVE E103 : 23771062 P.C.B, VIDEO AUDIO P800 : 23122405 POWER UNIT P.C.B, SENSOR...
  • Page 58 1-6. Optical Engine Assembly E201 : 23405047 OPTICAL ENGINE E232 : 23405050 SUB FRAME E235 : 23405053 for B POLARIZER-IN E239 : 23405057 E234 : 23405052 PBS PLATE for G POLARIZER-IN 5051 R-IN E241 : 23405049 PBS FAN Sub Frame E231 : 23405049 E238 : 23405056 MAIN FRAME...
  • Page 59 1-7. Document Camera Assembly B386 SSEMBLY B372 B383 B382 Hook B382A B382B B382C (Inner spring) B377 Flat spring The two hooks of the camera assembly are B380 held with the two flat springs. Release the two hooks from the two flat springs by using a tweezers etc.
  • Page 60 1-8. Labels A300 A301 23553396 (781) 23553398 (780) 23553397 (780) A303 23553399 (781U) 23553400 (780U) 23553429 (781E) 23553430 (780E) 23553433 (781C) 23553434 (780C)

  • Page 61: Parts List

    2. PARTS LIST LOCATION PARTS LOCATION PARTS NUMBER NUMBER DESCRIPTION NUMBER NUMBER DESCRIPTION - MECHANICAL PARTS - - ELECTRICAL PARTS - A100 23540984 TOP COVER E101 23771060 MAIN PC BOARD A201 23436779 HANDLE E102 23771061 DRIVE PC BOARD A210 23450454 FRONT PANEL (L) E103 23771062...
  • Page 62 LOCATION PARTS NUMBER NUMBER DESCRIPTION NOTES - ACCESSORY PARTS - (LANGUAGE) Y104 23368796 USB CABLE ENG : English Y105 23368798 AUDIO CABLE FRE : French Y111 23062007 OWNER'S MANUAL(CD-ROM) GER : German Y115 23448621 SOFT CASE ITA : Italian Y201 23565449 OWNER'S MANUAL (ENG/FRA) SPA : Spanish...

  • Page 63: Specifications

    SPECIFICATIONS Main Unit TLP-780 TLP-781 Power requirements AC 100-240V 50/60Hz Power consumption 300W (standby:20W ) 310W (standby:20W ) Mass 4.2kg 5.0kg Dimensions W338mmxH95mmxD265mm W338mmxH95mmxD328mm Ambient environment Temperature:0 to 35 cent degree Humidity:30% to 70% HR Lamp 200W High pressure Hg lamp Speaker 1W (monaural) RGB INPUT...
  • Page 64 1-1, SHIBAURA 1- CHOME, MINATO - KU, TOKYO 105 - 8001, JAPAN...

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