TOSHIBA TLP711U,E,H - Service Manual Immediate Download

3LCD DATA PROJECTOR

SERVICE MANUAL

TLP710U, TLP711U

TLP710E, TLP711E

TLP710H, TLP711H

FILE NO. 333-9807

PRINTED IN JAPAN, Nov., 1998 S

TLP711

SECTION 1

PART REPLACEMENT AND ADJUSTMENT PROCEDURES

SECTION 2

SERVICING DIAGRAMS

SECTION 3

PARTS LIST

1 . SAFETY PRECAUTION ...................................................... 3 - 1

2 . NOTICE ..................................................................................... 3 - 1

3 . ABBREVIATIONS .................................................................. 3 - 1

3-1. Integrated Circuit (IC) .................................................... 3-1

3-2. Capacitor (Cap) ................................................................ 3-1

3-3. Resistor (Res) ..................................................................... 3-1

4 . ELECTRICAL ADJUSTMENT .......................................... 1 - 6

4-1. LCD Drive Adjustment (A) ....................................... 1 - 8

4-1B. LCD Drive Adjustment (B) ................................. 1-10

4-2. Camera Section Adjustment (For TLP711) .............. 1-14

1 . PART CONFIGURATION AND THEIR SYMBOLS 2 - 1

2 . PRINTED WIRING BOARD AND

SCHEMATIC DIAGRAM .................................................... 2 - 7

3 . BLOCK DIAGRAM ............................................................... 2 - 7

3-1. Video Block Diagram ....................................................... 2-7

4 . CIRCUIT DIAGRAMS ......................................................... 2 - 9

4-1. Power Circuit Diagram .............................................. 2 - 9

4-2. Drive Circuit Diagram ................................................... 2-13

4-3. Digital 1 Circuit Diagram ............................................. 2-17

4-4. Digital 2 Circuit Diagram ............................................. 2-20

4-5. Digital 3 Circuit Diagram ............................................. 2-23

4-6. RGB Circuit Diagram .................................................... 2-26

4-7. Input Circuit Diagram ................................................... 2-29

4-8. Shading Circuit Diagram .............................................. 2-31

4-9. Up-Con Circuit Diagram .............................................. 2-33

4-10. ............................................. Camera Out Circuit Diagram

2-37

4-11. .................................................. FAN-Key Circuit Diagram

2-41

1 . LOCATION OF MAIN PARTS ......................................... 1 - 1

2 . LOCATION OF PC BOARDS ........................................... 1 - 1

3 . DISASSEMBLING .................................................................. 1 - 2

3-1. Main Unit Optical Box ................................................. 1-2

CONTENTS

SAFETY PRECAUTIONS .............................................................. i

IMPORTANT PRECAUTIONS .................................................... i

IMPORTANT SAFETY INSTRUCTIONS ............................... i i

4 . EXPLODED VIEWS .............................................................. 3 - 2

4-1. Packing Assembly ............................................................. 3-2

4-2. Chassis Assembly (1) ........................................................ 3-3

4-3. Chassis Assembly (2) (For TLP711) .............................. 3-4

4-4. Optical Box Assembly ...................................................... 3-5

4-5. Arm Assembly (For TLP711) ......................................... 3-6

5 . PARTS LIST ............................................................................. 3 - 7

1-1

SECTION 1

PART REPLACEMENT AND

ADJUSTMENT PROCEDURES

1. LOCATION OF MAIN PARTS

Fig. 1-1-1

2. LOCATION OF PC BOARDS

Fig. 1-2-1

SECTION

REPLA

CEMENT

AND

ADJUSTMENT

PROCEDURES

1-2

CAUTIONS BEFORE STARTING SERVICING

Electronic parts are susceptible to static electricity and may easily damaged, so do not forget to take a 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. Several kinds of screws are used and some of them need special cautions. That is, take care

of the tapping screws securing molded parts and fine pitch screws used to secure metal parts. If they are used

improperly, the screw holes will be easily damaged and the parts can not be fixed.

3. DISASSEMBLING

3-1. Main Unit Optical Box

3-1-1. Lens

1. Remove optical box.

2. Remove 4 screws (1) and remove lens.

Fig. 1-3-1

3-1-2. LCD Block, LCD Plate and LCD Panel

Note:

· Do not touch the LCD panels with your bare fingers.

Wear white cotton gloves when working with the

panels.

1. Remove all cables connected to connectors on PC

board and LCD panel and drive PC board.

2. Remove FPC section of LCD panel from drive PC

board.

3. Remove 3 screws (1) (always use a screw driver with a

strong magnet) and remove LCD plate with LCD to be

replaced from LCD block. When replacing three

LCDs at the same time, first remove green LCD plate

from the LCD block.

4. Remove 3 screws (2) and remove LCD panel from

LCD plate.

Fig. 1-3-2

< How to mount a new LCD >

1. When mounting a red LCD, mount it on the red LCD

plate (No. 23430555) or when mounting a blue LCD,

mount it on the blue LCD plate (No.23430554) so

that the FPC section faces upward and main unit side

faces downward.

2. When mounting a green LCD, mount it on the LCD

plate used so far. Then place the green LCD on it in

the same direction as the red and blue LCDs by

tightening screws (3 holes on the LCD plate).

3. Mount the LCD plate with a new LCD mounted at the

bottom side of the LCD block (can be mounted only

in one direction) and tighten the screws. Do not

tighten the screws completely. Tighten the screws

temporarily so that the LCD can move for later pixel

matching adjustment of the LCDs.

1-3

< Drive PC board remounting >

Connect cables removed from connectors on the drive PC

board and the LCD panel as they were connected. (If a

signal generator which can not generate a white raster

signal is not available, do not connect the LCD panel.)

< Setup >

1. Make a wall chart on white fiber board as illustrated

in Fig. 1-3-4.

Note:

· Only use a stiff material to prevent focus errors.

Fig. 1-3-4

2. Retract the foot adjusters so the unit sits flat.

3. Place the LCD Projector on a table so that the front

edge of the lens is 1.41m from the wall. (Refer to Fig.

1-3-4.)

4. Set the zoom ring to the maximum wide setting.

5. Adjust the focus ring to the center of its range.

6. Feed a white raster signal through RGB connectors

and turn on the power of the projector. (If a signal

generator which provides a white raster signal is not

available, turn on the power without connecting the

LCD panel.)

7. If all three LCD panels need to be replaced, refer to

the "Green LCD adjustment".

< Adjustment of LCD >

If the red and blue LCD panels need to be adjusted,

follow the procedures in the item "Red/Blue LCD

adjustment". However, if the green LCD panel needs to

be adjusted, follow the procedures in the item "Green LCD

adjustment". After the green LCD panel adjustment is

carried out, it is necessary to replace or adjust the red and

blue LCD panels as described in the item "Red/Blue LCD

adjustment".

< Service jig >

· Extension cable kit : 23588458

· Focus adjust jig : 23430581

Fig. 1-3-3

When using the extension cable kit (23588458), you will

perform the adjustment on PC boards removing the PC

boards from the unit.

1. Remove the PC boards (Video, digital and drive) from

the unit.

2. Connect PC boards each other again.

3. Connect the unit and PC boards removed using the

extension cable.

Connection of each extension cable

(1) Power unit Fan/Key board (PF004)

26P

(Part code: 23588463)

(2) UP-CON board Camera out (PV003)

26P

(3) Intake fan Fan/Key board (PF011)

(Part code: 23588460)

(4) Exhaust fan Fan/Key board (PF012)

(Part code: 23588459)

(5) Thermal lead SW Fan/Key board (PF003) 2P

(Part code: 23588465)

(6) LCD panel Drive board (P401)

32P

(Part code: 23588464)

(7) LCD panel Drive board (P501)

32P

(Part code: 23588464)

(8) LCD panel Drive board (P601)

32P

(Part code: 23588464)

This connector is open

(1) PL001

Fan/Key board

PL005

(2) PL002

Digital board F. REM board

(3) PF006

Digital board F. REM board