Toshiba 52HM85 Bedienungsanleitung

SERVICE MANUAL

Projection Television

52HM85

62HM85

FILE NO. 020-200506

(REVISED.1)

Published in Japan Nov. 2005 (YC)

TOSHIBA CORPORATION 2005

TABLE OF CONTENTS

SAFETY INSTRUCTIONS .............................................................................................................................................. 3

SERVICE MODE ............................................................................................................................................................ 4

SETTING & ADJUSTING DATA ...................................................................................................................................... 7

LAMP UNIT REPLACEMENT......................................................................................................................................... 8

PARTS REPLACEMENT IN LIGHT ENGINE...............................................................................................................

LIGHT ENGINE REPLACEMANT.................................................................................................................................

EXPLODED VIEW........................................................................................................................................................ 15

MECHANICAL DISASSEMBLY.................................................................................................................................... 16

CHASSIS REPLACEMENT PARTS LIST ..................................................................................................................... 17

PC BOARDS TOP AND BOTTOM VIEW ..................................................................................................................... 24

TERMINAL VIEW OF TRANSISTORS ......................................................................................................................... 36

CIRCUIT BLOCK DIAGRAM ........................................................................................................................................ 39

APPENDIX:

CIRCUIT DIAGRAM

Many electrical and mechanical parts in this chassis have special safety-related characteristics. These characteristics are

often passed unnoticed by a visual inspection and the protection afforded by them cannot necessarily be obtained by using

replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety charac-

teristics are identified in this manual and its supplements; electrical components having such features are identified by the

international ha ard symbols on the schematic diagram and the parts list.

Before replacing any of these components, read the parts list in this manual carefully. The use of substitute replacement

parts which do not have the same safety character istics as specified in the parts list may create shock, fire, or other ha ards.

PRODUCT S FETY NOTICE

S FETY INSTRUCTIONS

WARNING: Service should not be attempted by anyone unfamiliar with the necessary precautions on this receiver. 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 receiver and the AC line before any service is

performed on the receiver.

2. When replacing a chassis in the cabinet, always be certain that all the prospective devices are put back in place, such as;

non-metallic control knobs, insulating covers, shields, isolation resistor-capacitor network etc.

S FETY PREC UTION

3. SELECTING THE DJUSTING ITEMS

1) Every pressing of CHANNEL button in the service mode changes the adjustment items in the order of table-2.

( button for reverse order)

Refer to table-1 for preset data of adjustment mode.

(See SETTING & ADJUSTING DATA on page 7)

4. DJUSTING THE D T

1) Pressing of VOLUME or button will change the value of data in the range from 00H to FFH. The variable range

depends on the adjusting item.

5. EXIT FROM SERVICE MODE

1) Pressing POWER button to turn off the TV once.

SERVICE MODE

1. ENTERING SERVICE MODE

MUTE

(Service mode display)

3) While pressing the MUTE button,

press MENU button on TV set.

2) Press MUTE button

again and keep pressing.

1) Press MUTE button twice

on Remote Control.

2. DISPL YING THE DJUSTMENT MENU

Adjustment mode

Press

Service mode

Item

Data

1) Press MENU button on TV.

6. SELF DI GNOSTIC FUNCTION

1) Press “9” button on Remote Control during display of adjustment menu in the service mode.

The diagnosis will begin to check if interface among IC’s is executed properly.

2) During diagnosis, the following displays are shown.

Part number of microprocessor (IC601)

Operation number of protection circuit (The number of times of the power supply OFF by fan stop) . . . . “000” is normal.

BUS line check “OK” ................... Normal

“SCL-GND” or “NG” ........... SCL-GND short circuit

“SDA-GND” or “NG” ........... SDA-GND short circuit

“SCL-SDA” or “NG” ............ SCL-SDA short circuit

BUS line ACK (acknowledge) check

“OK” ................... Normal

Sync. signal check Green display ..... Normal

Red display ........ NG

MAIN ........ Main sync

SUB .......... Sub sync (when turn on the PIP)

ID code for TV Set

Version of "EEP"

Data for "OPT"

SELF CHECK

NO. 23 * * * * * *

POWER : 000

BUS LINE : OK

BUS CONT : OK

BLOCK : MAIN SUB

SET ID : 80

E2P VER : 08

OPT1 : 00 OPT2 : A0

SW VER : DLE May 13 2004 17:**:**

HDMI

NO ********

ERR CDDE : 00

BEP

SW VER : 42

E2R VER : 02

TIME

TV : ******

LAMP :

****

Thermo1 : +51

Thermo2 : +50

Temperature of DMD

Temperature of the color wheel neighborhood

Software version history

HDMI Software

NO ***** .....Serial No.

ERR CODE .....Error Code

BEP Software Version

SW VER : **.....Version

E2P VER : ** EEP ROM Version

Use time

TV .....TV set on time (hour)

LAMP.....LAMP set on time (hour)

(It may shift from TV set on time.)

7. LED indications

The green and red LED lights on the TV control touchpad

(on the lower right corner of the TV screen)

indicate the TV's current status, as follows:

. Green ON Solid (not blinking) = Control touchpad

. Red ON Solid (not blinking) = Power ON.

. Green and/or Red blinking

(see table below for condition and solution).

MENUVOLUMECHANNELEXITTV/VIDEO POWER

Green indicator

Red indicator

Control touchpad on TV front

LED Indication

Red and Green turn off.

Red light solid and Green off.

Red and Green lights solid.

Green blinks at 1-second intervals;

Red off.

Green blinks at 0.3-second inter-

vals; Red lights solid.

Green lights solid and Red blinks

at 0.5-second intervals.

Green and Red blink at 1-second

intervals.

Red blinks at 0.5-second intervals;

Green off.

Red blinks at 1-second intervals;

Green off.

Red blinks three times; Green off.

Red and Green blink three times.

Condition

Power supply OFF. (AC)

Power supply OFF. (Standby)

(North America)

Power supply ON.

Touched the touchpad

Lamp LPS mode

The lamp is not working properly.

The lamp unit door is not seated

properly. (U)

The lamp is not working properly

after the eight automatic restart

(see item #7). (U)

FAN (Light engine unit) has

stopped.

BUS line is damaged

The color wheel has stopped.

Temperature rises abnormally.

(U) is restoration by the user.

Solution

The TV automatically will try to restart

itself eight times.

Turn the POWER OFF and unplug the power

cord. Review "Lamp Unit Replacement" on

pages 8-10 to ensure that the lamp unit door

is installed securely.

Turn the POWER OFF and then ON again. If

the problem persists, replace the lamp unit

(see pages 8-10).

• Is the output voltage of the supply voltage

regulator for the FAN in the power circuit

normal?

• Has dust accumulated in the FAN?

If the output voltage is not abnormal,

replace the faulty FAN with a new one.

• Check the faulty device through the self

diagnostics function under SERVICE mode.

• Does BUS line (SCL, SDA) work normally?

If the BUS line is under abnormal

conditions, replace the faulty device with

a new one.

• Is the output voltage of the power supply

circuit normal?

If the output voltage is normal, replace the

engine with a new one.

• Is the ventilating hole in the set (exhaust

slot on the rear) blocked or covered?

• Is FAN rotating normally?

• Has dust accumulated in the ventilating

hole?

If no abnormally conditions are found,

replace the engine with a new one.

being pressed.

SETTING & DJUSTING D T

SERVICE MODE

DJUSTING ITEMS ND D T IN THE SERVICE MODE:

Item Name of adjustment Preset Data

Table-1

RCUT R CUT OFF

GCUT G CUTOFF

BCUT B CUT OFF

RDRV R DRIVE

GDRV G DRIVE

BDRV B DRIVE

BRTC BRIGHT CENTER

SCNT

SUB CONTRAST FOR TV

COLC COLOR CENTER

UVTT BASE BAND TINT

CNTX SUB CONTRAST MAX

HPOS H-POSITION (PAL/DFS)

VPOS

V-POSITION DC SHIFT (PAL/DFS)

CWDH

COLOR WHEEL DELAY (HIGH)

CWDL

COLOR WHEEL DELAY (LOW)

DMDB DMD BIAS

OPT0 TV SET OPTION 0

Note:

The image system data of RCUT-CNTX is different by each image format.

The NTSC value is indicated in the table.

60H

64H

48H

53H

5FH

76H

20H

D0H

40H

7FH

00H

FAH

03H

00H

A0H

40H

14H

03H

0FH

05H

14H

04H

23H

4AH

63H

6FH

73H

20H

91H

24H

73H

01H

Item Name of adjustment Preset Data

OPT1 TV SET OPTION 1

TVOP TV OPTION

PLLW0 PLL WAIT TIME

PLLW1 PLL WAIT TIME

PLLW2 PLL WAIT TIME

PLLW3 PLL WAIT TIME

PLLW4 PLL WAIT TIME

PLLW5 PLL WAIT TIME

V01 VOLUME (DATA)

V25 VOLUME (DATA)

V50 VOLUME (DATA)

V75 VOLUME (DATA)

V100 VOLUME (DATA)

MODH MODUS DATA HIGH

MODL MODUS DATA LOW

PRES FMAM PRESCALE

SCTH

VOLUME SCART OPTION HIGH

SCTL

VOLUME SCART OPTION LOW

L MP UNIT REPL CEMENT

The light source for this TV is a mercury lamp with internal atmospheric

pressure that increases during use. The lamp has a limited service life

that varies depending on user settings. If you use the lamp beyond its

service life:

you may notice a reduction in the colors and/or brightness of the pic-

ture; and



the strength of the quart glass in the lamp will be reduced and the

lamp may rupture (often making a loud noise when this happens). If

the lamp reputres, the TV will not operate until the lamp unit is replaced.

Note: The lamp unit is designed so broken lamp glass remains se-

curely inside the lamp unit.

C UTION: lways handle the lamp unit with care.

The lamp unit in this TV was designed for safe replace-

ment by consumers; however, if the lamp unit is subjected to inten-

tional abuse (such as excessive mechanical abuse or handling by

children or pets), the unit may break, exposing edges or pinch points.

When to replace the lamp unit

You should replace the lamp unit:

if the picture darkens and/or colors fade;

if the lamp does not light; or

If you hear a loud noise and the picture goes black, which may indi-

cate a lamp rupture (LED indication #8). See LED indications on

page 6.

Cautions when replacing L MP UNIT (E998Z; PJ-D95-LMP)

Note: The lamp unit is designed so broken lamp glass remains se-

curely inside the lamp unit.

Note: Be sure wear the gloves before replacing the lamp unit.

1. Turn off the TV and unplug the power cord.

2. STOP! Allow the lamp to cool for at least one (1) hour

before replacing it.

3. On the back of the TV, loosen the thumb screw (by hand)

on the lamp unit door, and then remove the lamp unit

door.

4. Using a manual screwdriver, loosen two screws on the

lamp unit.

5. Grasp the lamp unit handle and gently pull the lamp unit

straight out of the TV. Set the old lamp unit aside.

6. Carefully insert the new lamp unit straight into the TV

until it is fully seated.

Note :

Never subject the lamp unit to excessive shock.

Never touch the lamp unit glass or otherwise get it

dirty.

Doing so may affect the image quality and reduce

the service life of the lamp. See “Cleaning the lamp

unit glass” below.

7. Using a manual screwdriver, tighten two lamp unit

screws.

Note:Hand-tighten only. Do not use an electric screw-

driver.

8. Reattach the lamp unit door, making sure to insert the

hook on the left side of the lamp unit door inside the

opening in the TV cabinet.

9. Replace the thumb screw and hand-tighten.

10. Plug in the power cord and turn on the TV. After the

initial warmup period (which may take up to 45 seconds

for full picture brightness), the TV should operate nor-

mally. If any of the following conditions exist, turn off the

TV, unplug the power cord, and repeat steps 1-9 to en-

sure that the lamp unit and lamp unit door are installed

correctly:

No picture

Dark picture

TV will not turn on

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