SUMMARY
28ZD26P is the same as 32ZD26P except for the parts tabled on back of this sheet.
Use this service manual together with the original service manual of 32ZD26P (File No. 030-
200206).
FILE NO. 033-200221
SERVICE MANUAL
COLOUR TELEVISION
ZD26 Chassis
28ZD26P
PUBLISHED IN JAPAN,
Jul., 2002
So
Location
No.
Part No.
Description
REPLACEMENT PARTS LIST DIFFERENCES
TOSHIBA CORPORATION
1-1, SHIBAURA 1-CHOME, MINATO-KU, TOKYO 105-8001, JAPAN
Location
No.
Part No.
Description
A201S
23530375
Front Cover
A223
23035412
Screw, BTB4X12SZN
A231
23445632
Button, Power
A242
23428087
Door
*A401
23530271
Back Cover
A701
23064879
Carton
A702
23946384
Packing, Bottom
A703
23946385
Packing, Top
C314
24793101
EL, 100?F,
±20%, 10V
C315
24212102
CD, 1000pF,
±10%
C430
24820222
PF, 0.0022?F, 630V
C444
24503197
CF92T3Q622HA
C447
24820123
PF, 0.012?F, 630V
C491
24503190
CF92T2G124JA
C492
24503190
CF92T2G124JA
C4490
24503282
CF92T2G164JA
C4491
24503251
CF92T2G184JA
G306
24366562
CF, 5600 ohm
L441
23233035
Coil, Linearity, TLN2199AT
L901
23200489
Coil, Degaussing, TSB-2397CM
Q301
23905610
IC, LA7846N
Q304
23314794
Transistor, 2PC1815Y
R211
24366473
CF, 47k ohm
R227
24366333
CF, 33k ohm
R305
24323688
MF, 0.68 ohm, 2W
R311
24366911
CF, 910 ohm
R313
24366132
CF, 1300 ohm
R317
24366102
CF, 1k ohm
R321
24552392
OMF, 3900 ohm, 1/2W
R324
24366681
CF, 680 ohm
R325
24366103
CF, 10k ohm
R328
24366102
CF, 1k ohm
R336
24383221
OMF, 220 ohm, 2W
R353
24366471
CF, 470 ohm
R460
24366103
CF, 10k ohm
R461
23183966
TAS WIRE R60
R920
24000945
FR, 1.8 ohm, 2W
RA71X
24366683
CF, 68k ohm
RA72X
24366223
CF, 22k ohm
RA73X
24366103
CF, 10k ohm
RA76X
24366103
CF, 10k ohm
S801X
23344416
Switch, Power
SA01X
23145430
Switch, Push, 1C1P
SA02X
23145430
Switch, Push, 1C1P
SA03X
23145430
Switch, Push, 1C1P
SA04X
23145430
Switch, Push, 1C1P
SA05X
23145430
Switch, Push, 1C1P
*T461
23236766
Transformer, Flyback,
TFB4188AH
T461B
23501175
Cable, Forcus
T461C
23501176
Cable, Forcus
* U901
23787341
CRT-D Board, PD0491C
* U902
23787342
SIGNAL Board, PD0492D
* U903A
23787343
POWER Board, PD0493D-1
* U903B
23787719
CONT-2 Board, PD0493D-2
* U903C
23787718
INDICATOR Board, PD0493D-3
* U904
23787344
DEF Board, PD0494D
*V901
23312994
Picture Tube, W66QDE991X81
*V901A
23903145
Socket, CRT
TOSHIBA CORPORATION
1-1, SHIBAURA 1- CHOME, MINATO-KU, TOKYO 105-8001, JAPAN
FILE NO. 030-200206
SERVICE MANUAL
COLOUR TELEVISION
ZD26 Chassis
32ZD26P
PUBLISHED IN JAPAN
Mar. 2002 So
2
GENERAL
ADJUSTMENTS
SPECIFIC
INFORMATIONS
TABLE OF CONTENTS
CHAPTER 1 GENERAL ADJUSTMENTS
SAFETY INSTRUCTIONS ........................................................................................................................................ 3
SET-UP ADJUSTMENT ............................................................................................................................................ 4
SERVICE MODE ...................................................................................................................................................... 6
DESIGN MODE ........................................................................................................................................................ 9
ELECTRICAL ADJUSTMENTS .............................................................................................................................. 10
CIRCUIT CHECK .................................................................................................................................................... 12
CHAPTER 2 SPECIFIC INFORMATIONS
SETTING & ADJUSTING DATA .............................................................................................................................. 13
LOCATION OF CONTROLS ................................................................................................................................... 14
CHASSIS AND CABINET REPLACEMENT PARTS LIST ......................................................................................16
PC BOARDS BOTTOM VIEW ................................................................................................................................. 29
TERMINAL VIEW OF TRANSISTORS ................................................................................................................... 37
CIRCUIT BLOCK DIAGRAM .................................................................................................................................. 40
SPECIFICATIONS .............................................................................................................................................. END
APPENDIX:
CIRCUIT DIAGRAM
3
GENERAL
ADJUSTMENTS
SPECIFIC
INFORMATIONS
CHAPTER 1 GENERAL ADJUSTMENTS
SAFETY INSTRUCTIONS
WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "X-RAY RADIATION PRECAUTION", "SAFETY PRECAU-
TION" AND "PRODUCT SAFETY NOTICE" INSTRUCTIONS BELOW.
X-RAY RADIATION PRECAUTION
1. Excessive high voltage can produce potentially hazard-
ous X-RAY RADIATION. To avoid such hazards, the high
voltage must not be above the specified limit. The nominal
value of the high voltage of this receiver is (A) kV at zero
beam current (minimum brightness) under a (C) V AC power
source.The high voltage must not, under any circumstances,
exceed (B) kV.
Refer to table-1 for high voltage (A), (B) & AC voltage (C).
(See SETTING & ADJUSTING DATA on page 13)
Each time a receiver requires servicing, the high voltage
should be checked following the HIGH VOLTAGE CHECK
procedure in this manual. It is recommended that the read-
ing of the high voltage be recorded as a part of the service
record. It is important to use an accurate and reliable high
voltage meter.
2. The only source of X-RAY RADIATION in this TV receiver
is the picture tube. For continued X-RAY RADIATION pro-
tection, the replacement tube must be exactly the same
type tube as specified in the parts list.
3. Some part in this receiver have special safety-related char-
acteristics for X-RAY RADIATION protection. For contin-
ued safety, parts replacement should be undertaken only
after referring to the PRODUCT SAFETY NOTICE below.
SAFETY PRECAUTION
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. Always discharge the picture tube anode to the CRT conductive coating before handling the picture tube. The picture tube
is highly evacuated and if broken, glass fragments will be violently expelled. Use shatter proof goggles and keep picture tube
away from the unprotected body while handling.
3. When replacing a chassis in the cabinet, always be certain that all the protective devices are put back in place, such as; non-
metallic control knobs, insulating covers, shields, isolation resistor-capacitor network etc.
PRODUCT SAFETY NOTICE
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 char-
acteristics 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 characteristics as specified in the parts list may create shock, fire, X-ray
radiation or other hazards.