Toshiba 43PH14P User manual

– SUMMARY –

61PH18Q is the same as 61PH18P except for the parts tabled on back of this sheet.

Use this service manual together with the original service manual of

61PH18P

(File No. 030-

200114).

FILE NO. 033-200212

SERVICE MANUAL

COLOUR TELEVISION

C01P Chassis

61PH18Q

PUBLISHED IN JAPAN, May., 2002 So

TOSHIBA CORPORATION

1-1, SHIBAURA 1-CHOME, MINATO-KU, TOKYO 105-8001, JAPAN

PRINTED IN JAPAN Jun., 2001 T

FILE NO. 030-200108

SERVICE MANUAL

COLOUR TELEVISION

C01P Chassis

43PH14P

– 10 –

GENERAL ADJUSTMENTS

SPECIFIC INFORMATIONS

SERVICE MODE

1. ENTERINGTO SERVICE MODE

(Service mode display)

Item

Data

or Sound Mute

3) While pressing the obutton,

press MENU button on TV set.

2) Press obutton again to

keep pressing.

2. DISPLAYINGTHE ADJUSTMENT MENU

1) Press MENU button on TV.

3. KEY FUNCTION INTHE SERVICE MODE

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

Screen adjustment mode ON/OFF: -/-- button (on Remote)

Test signal selection : abutton (on Remote)

Selection of the adjustment items : Channel s/t(onTV or Remote)

Change of the data value : Volume ;+/– (onTV or Remote)

Adjustment menu mode ON/OFF : MENU button (onTV)

Initialization of the memory (QA02) : CALL + Channel button onTV (s)

Reset the count of operating protect

circuit to “00”: CALL + Channel button onTV (t)

“RCUT” selection : 1 button

“GCUT” selection : 2 button

“BCUT” selection : 3 button

“SCNT” selection : 4 button

“COLP” selection : 5 button

“TNTC” selection : 6 button

Convergence adj : YELLOW button

Self diagnostic display ON/OFF : 9 button

1) Press obutton once on

Remote Control.

Adjustment mode

Press

Service mode

Item

Data

Color thickness correction

note: Displayed differently as shown below, de-

pending on the setting of the receiving color

system.

COLP (PAL)

COLC (NTSC)

COLS (SECAM)

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

– 11 –

GENERAL ADJUSTMENTS

SPECIFIC INFORMATIONS

4. SELECTINGTHE ADJUSTING ITEMS

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

(tbutton 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 sbutton on theTV.The initialization of QA02 has

been complated.

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

Perform “Auto search Memory” 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 abutton on the Remote Control changes the built-in test patterns on screen as described below

in SERVICE MODE.

Signals Picture

• Red raster

• Green raster

• Blue raster

• All White

• Black cross-hatch

*The signals marked with are not usable to display in the Test signal for some model.

Signal off PAL signals (5 patterns)

NTSC signals (5 patterns)

– 12 –

GENERAL ADJUSTMENTS

SPECIFIC INFORMATIONS

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.

2300****

TIME : 000000

POWER : 00

BUS CONT : OK

BLOCK : UV V1 V2 V3 V4



Part number of microcomputer (QA01)

Total hour of turn the TV on. (Unit: H)

Operation number of protecting circuit ----“00” is nor-

mal.

When indication is other than “00”, overcurrent apts to

flow, and circuit parts may possibly be damaged.

BUS CONT ----“OK” is normal.

When indication shows“Q uuu NG”, the device with

the number may possibly be damaged.

BLOCK

UV :TV reception mode

V1 : VIDEO 1 input mode (a1)

V2 :VIDEO 2 input mode (a2)

V3 :VIDEO 3 input mode

V4 :VIDEO 4 input mode

Indicated color of mode now selected : Green and Red

Indicated color of other modes : Black

Green :Normal

Red : Themicrocomputer operatesto providejudgement

of no video signal. The red color is still indicated

though the signal is input, failure may exist in input

signal line including QV01.

NOTE: (1) In casethat "ontimer" indicatorisblinkingwith

interval of 0.5 seconds; it means protecting

circuit (Current limiter) is operating, and cir-

cuit components may possibly be damaged.

Check related components.

(2) In casethat "ontimer" indicatoris blinkingwith

interval of 1 second; Protecting circuit does

not operate, but a part of Bus line does not

operate normally. Check Bus line.











*The items marked with are not usable to display in the SELF DIAGNOSTIC FUCTION for some model.

– 13 –

GENERAL ADJUSTMENTS

SPECIFIC INFORMATIONS

DESIGN MODE

1. ENTERINGTO DESIGN MODE

ITEM

DATA

S D Press

(Design mode) (Adjustment mode)

Press

3) Press MENU button on TV.

2) While pressing CALL button on Remote

and press MENU button on TV.

1) Select the Service mode.

When QA02 is initialized, items “OPT0”, “OPT1” and "OPT2" of DESIGN MODE are set to the data of the representative model

of this chassis family.

Therefore, because ON-SCREEN specification remains in the state of the representative of model.This model is required to

reset the data of items “OPT0”, “OPT1” and "OPT2".

2. SELECTINGTHE ADJUSTING ITEMS

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

(sbutton for reverse order)

Refer to table-3 for data of design mode.

(See SETTING & ADJUSTING DATA on page 27)

3. ADJUSTINGTHE DATA

Pressing of VOLUME sor tbutton will change the value of data.

– 30 –

SPECIFIC INFORMATIONS

CIRCUIT BLOCK DIAGRAM

RearCenter

Main

CRT.RCRT.GCRT.B

VIDEO OUT

SVM OUT

VIDEO OUT

SVM OUT

VIDEO OUT

SVM OUT

V OUT

Q301

H OUT

Q404

CONVER OUT

Q751,Q752

SVMSVMSVM

D CONVER

RGBYs

Rear AMP

Center AMP

Main AMP

BACK END PROCESSOR

Q510

RGB

OSD

QR01

RGB

MIXER

E/W

CORRECTION

UP C ONVERTER

BLK/CP/B-MASK

YCbCr->YUV

Y2/U/Vin

TEXT

RGBYs

Q302

FBT

AFC

AMP

ADC

MPX ADC

TC90A61F

DFS

PLL

EM626327Q

SGRAM

TIF

MAA

H001

H002

L,R,SL,SR,C

L,R

SL,SR

L,R OUT-1

TV-L,R

TV-V

ANT

DIGITAL

AUDIO IN

W-OUT AMP

AV SWQV01

I/O1

I/O2

I/O3

TV-L, R out

V,L,R OUT-2

AUDIO OUT

FIX

RGBYs

Y/V,C,L,R S1

V,L,R

V,L,R S2

FRONT

S+AV

MICRO

PROCESSOR

QA01

EEP-ROM

QA02

CLK,DATA,CS,BUSY,RST

SGV

SDA3,SCL3

SDA,SCL

SYNC-AV

SYNC-OUT

RGB

MULTI COLOR DECODER

Q501

EPG SW

CVBSout Y1 in

Yviout

SYNCin

YCbCr

HD/VD

RGB1in

E4(YCbCr)

YCbCr1in

CVBS/Y2in

C-OUT C1in

D-COMB

Y-OUT

CVBS/Y1in

COMBin

2001 Euro PJTV CIRCUIT BLOCK DIAGRAM

SCHEMATIC DIAGRAM MODEL : 43PH14P

WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "X-RAY RADIATION PRECAUTION", "SAFETY

PRECAUTION" AND "PRODUCT SAFETY NOTICE" ON THE MANUAL FOR THIS MODEL.

CAUTION: The international hazard symbols "*" in the schematic diagram and the parts list designate components

which have special characteristics important for safety and should be replaced only with types identical to those in the

original circuit or specified in the parts list. The mounting position of replacements is to be identical with originals.

Before replacing any of these components, read carefully the PRODUCT SAFETY NOTICE on the MANUAL for this

model. Do not degrade the safety of the receiver through improper servicing.

4. Voltages read with DIGITAL MULTI-METER from point indicated to chassing ground, using a color bar signal with all

controls at normal, line voltage 220 volts.

5. Waveforms are taken receiving color bar signal with enough sensitivity.

6. Voltage reading shown are nominal values and may vary ±20% except H.V.

NOTE:

1. RESISTOR Resistance is shown in ohm [K = 1.000, M = 1.000.000]. All resistors are 1/6W and 5%

tolerance carbon resistor, unless otherwise noted as the following marks.

1/2R = Metal or Metal oxide of 1/2 watt 1/2S = Carbon compsistion of 1/2 watt

1RF = Fuse resistor of 1 watt 10W = Cement of 10 watt

K = ±10% G = ±2% F = ±1%

2. CAPACITOR Unless otherwise noted in schematic, all capacitor values less than 1 are expressed in

?F, and the values more than 1 in pF.

All capacitors are ceramic 50V, unless otherwise noted as the following marks.

Electolytic capacitor Mylar capacitor

3. The parts indicated with " *" have special characteristics, and should be replaced with identical parts only.

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