Toshiba 46WM48P Bedienungsanleitung

SERVICE MANUAL

Projection Television

46WM48P

FILE NO. 030-200419

REVISED.1

Published in Japan, Dec. 2004 (YC)

TABLE OF CONTENTS

CHAPTER 1 GENERAL ADJUSTMENTS

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

SERVICE MODE ............................................................................................................................................................

.............................................................................................................................................................

.........................................................................................................................................

.......................................................................................

...............................................................................................................................................

DESIGN MODE 7

CHAPTER 2 SPECIFIC INFORMATIONS

SETTING & ADJUSTING DATA ...................................................................................................................................... 9

LOCATION OF CONTROLS

Tuning the television using Quick setup, Programme sorting 12

LAMP UNIT REPLACEMENT ....................................................................................................................................... 13

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

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

EXPLODED VIEW ........................................................................................................................................................ 19

MECHANICAL DISASSEMBLY .................................................................................................................................... 20

CHASSIS REPLACEMENT PARTS LIST ..................................................................................................................... 21

PC BOARDS TOP AND BOTTOM VIEW ..................................................................................................................... 30

SCHEMATIC DIAGRAM 42

CIRCUIT BLOCK DIAGRAM ........................................................................................................................................ 44

SPECIFICATIONS .................................................................................................................................................... END

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 hazard 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 hazards.

PRODUCT SAFETY NOTICE

CHAPTER 1 GENERAL ADJUSTMENTS

SAFETY 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 the 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.

SAFETY PRECAUTION

SERVICE MODE

1. ENTERING TO SERVICE MODE

(Service mode display)

Item

Data

or Sound Mute

3) While pressing the button,

press MENU button on TV set.

2) Press button again to

keep pressing.

2. DISPLAYING THE ADJUSTMENT MENU

1) Press MENU button on TV.

3. KEY FUNCTION IN THE SERVICE MODE

The following key entry during display of adjustment menu provides special functions.

Test signal selection : button (on Remote)

Selection of the adjustment items : Channel / (on TV or Remote)

Change of the data value : Volume +/– (on TV or Remote)

Adjustment menu mode ON/OFF : MENU button (on TV)

Initialization of the memory (QA02) : CALL + Channel button on TV ( )

Reset the count of operating protect

circuit to “00”: CALL + Channel button on TV ( )

“RCUT” selection : button

“GCUT” selection : button

“BCUT” selection : button

Self diagnostic display ON/OFF : button

1) Press button once on

Remote Control.

Adjustment mode

Press

Service mode

Item

Data

CAUTION : Never try to perform initialization unless you have changed the memory IC.

4. SELECTING THE ADJUSTING 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-2 for preset data of adjustment mode.

(See SETTING & ADJUSTING DATA on page 27)

5. ADJUSTING THE DATA

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

depends on the adjusting item.

6. EXIT FROM SERVICE MODE

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

INITIALIZATION OF MEMORY DATA OF QA02

After replacing QA02, the following initialization is required.

1. Enter the service mode, then select any register item.

2. Press and hold the CALL button on the Remote, then press the CHANNEL button on the TV. The initialization of QA02 has

been complated.

3. Check the picture carefully. If necessary, adjust any adjustment item above.

Perform “Auto tune” on the owner’s manual.

CAUTION: Never attempt to initialize the data unless QA02 has been replaced.

7. TEST SIGNAL SELECTION

1) Every pressing of button on the Remote Control changes the built-in test patterns on screen as described below

in SERVICE MODE.

Signals Picture

• All White

• All Red

• All Green

• All Blue

• All Black

Signal off

ALL Red ALL Green ALL Blue ALL Black ALL White

8. SELF DIAGNOSTIC 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 are executed properly.

2) During diagnosis, the following displays are shown.

Firmware:

Temperature indication

+10 indicates temperature nearby the lamp unit

+99 indicates temperature nearby the light engine

ersion information of microprocessor

In case of file name : WM48 and Version : 1.00 indicates[WM48_100].

Time: Total Total hour of Lamp lights. (Unit : H)hour of turn the TV on. (Unit : H)

Power : Operation number of protecting circuit ----"00" is normal.

When indication is other than "00", overcurrent apt to flow, and circuit parts may

possibly be damaged.

BusCont : --- "OK" is normal.

When type name of semiconductor indicates.

BLOCK

UV : TV reception mode

V1 : VIDEO 1 input mode (

V2 : VIDEO 2 input mode (

V3 : VIDEO 3 input mode (

V4 : VIDEO 4 input mode (

V5 : VIDEO 5 input mode (

HDMI)V6 : HDMI input mode (

PC)PC: PC input mode (

7Model name (7 digit)

46WM48P

DLP +10

: +99

WM48_000

000006 (Lamp:000006)

DESIGN MODE

1. ENTERING TO DESIGN MODE

S D Press

(Design mode)

Press

2) While pressing CALL button on Remote

and press MENU button on TV.

1) Select the Service mode.

2. SELECTING THE ADJUSTING ITEMS

Every pressing of CHANNEL button in the design mode changes the adjustment items in the order of table-3.

( button for reverse order)

3. ADJUSTING THE DATA

Pressing of VOLUME or button will change the value of data.

Version information of

microprocessor

Main tuner information

Selectable picture information

Position information

Signal information

Screen size information

Sound system information

3) The following displays

are shown on the screen

WM48_000

34567

WM48_000

RED indicator

GREEN indicator

Control touchpad on TV front

MENUEXIT

4. 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:

·Red ON (solid) and Green OFF = TV power cord is

plugged in (the TV is ON or OFF).

·Green ON (solid) and Red OFF = The On timer is

operating.

·Green and Red ON (solid) = TV front touchpad is

being pressed.

·Green flashing (see table below for condition).

On timer set

Lowest ON

Abnormal operation (FAN stopped) 500ms ON, 500ms OFF

BUS line has failed. (IIC BUS error) 1sec ON, 1sec OFF

Lamp LPS (Low Power Standby) mode

(200ms ON

200ms OFF)x1 Time, 1sec OFF

The lamp lights again.

(200ms ON

200ms OFF)x2 Times, 1sec OFF

The lamp unit door is not closed properly.

(200ms ON

200ms OFF)x3 Times, 1sec OFF

The lamp is not lightning properly.

(200ms ON

200ms OFF)x4 Times, 1sec OFF

The color wheel has stopped, DMD bus error

(200ms ON

200ms OFF)x5 Times, 1sec OFF

Temperature increases abnormally.

(200ms ON

200ms OFF)x6 Times, 1sec OFF

ProblemPriority Green LED Operation

SETTING & ADJUSTING DATA

CHAPTER 2 SPECIFIC INFORMATIONS

SERVICE MODE

ADJUSTING ITEMS AND DATA IN THE SERVICE MODE:

Item Name of adjustment Preset Deta

46WM48P

Table-1

RCUT R CUT OFF

GCUT G CUTOFF

BCUT B CUT OFF

RDRV R DRIVE

GDRV G DRIVE

BDRV B DRIVE

HPOS

H.POSITION (PAL/WIDE)

VPOS

V.POSITION (PAL/WIDE)

CWDH

COLOR WHEEL DELAY (HIGH)

CWDL

COLOR WHEEL DELAY (LOW)

DMDB DMD BIAS

OPT0 TV SET OPTION 0

OPT1 TV SET OPTION 1

HOTE1

HOTEL MODE OPTION 1

HOTE2

HOTEL MODE OPTION 2

UOLX

Note:

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

The PAL value is indicated in the table.

Never adjust H.POS and V.POS except PAL/WIDE mode.

60H

55H

48H

4BH

00H

FAH

03H

8CH

00H

75H

OPT1 should be set to "20H" for UK shipment model.

LOCATION OF CONTROLS

Back

Front

OUT

HDMI

video recorder

decoder

COMPONENT VIDEO INPUT (EXT4)

HDMI™

Connecting a computer

INPUT

SAT

IN/OUT

VCRTV

SCART1

(EXT1)

SCART2

(EXT2)

SCART3

(EXT3)

MENUEXIT

Standby

RED LED–Power On

GREEN LED

INPUT 5

(EXT5)

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