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
S
(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
Press
Service mode
Item
Data
S
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


<SELF CHECK>
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
Q Q Q Q
VIDEO OUT SVM OUT VIDEO OUT SVM OUT VIDEO OUT SVM OUT
Q Q
V OUT
Q301
H OUT
Q404
CONVER OUT
Q751,Q752
DY DY DY
SVMSVMSVM
D CONVER
RGBYs
Q
Rear AMP
Q
Center AMP
Q
Main AMP
BACK END PROCESSOR Q510
RGB
YM
OSD
QR01
RGB
RGB MIXER
E/W CORRECTION
VP H
UP C ONVERTER
BLK/CP/B-MASK
YCbCr->YUV
Y2/U/Vin
TEXT
RGBYs
Q302
FBT
AFC
AMP
Y U V
ADC
MPX ADC
TC90A61F
DFS
VD
PLL PLL
HD
EM626327Q
SGRAM
TIF
MAA
H001
H002
L,R,SL,SR,C
L,R C
SL,SR
W
L,R OUT-1 TV-L,R TV-V
ANT DIGITAL AUDIO IN
W-OUT AMP
W
AV SWQV01
E1
E2
E3
I/O1 I/O2 I/O3
#8 #8 #8
TV-L, R out V,L,R OUT-2
AUDIO OUT FIX
RGBYs
Y/V,C,L,R S1
V1
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
Q
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.