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TOSHIBA CORPORATION
1-1, SHIBAURA 1- CHOME, MINATO-KU, TOKYO 105-8001, JAPAN
SERVICE MANUAL
COLOUR TELEVISION
Dec., 2002
FILE NO. 040-200211
V9PJ Chassis
50V9UE, 50VH9UA
50V9UM


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GENERAL
ADJUSTMENTS
TABLE OF CONTENTS
CHAPTER 1 GENERAL ADJUSTMENTS
SAFETY INSTRUCTIONS ............................................................................................................................................... 3
CRT ASSEMBLY REPLACEMENT AND MOUNTING .................................................................................................... 4
PICTURE TUBE COMPONENTS ADJUSTMENT ........................................................................................................... 6
SERVICE POSITION ....................................................................................................................................................... 9
SERVICE MODE ........................................................................................................................................................... 10
DESIGN MODE ............................................................................................................................................................. 13
ELECTRICAL ADJUSTMENT ....................................................................................................................................... 14
CONVERGENCE ADJUSTMENT .................................................................................................................................. 20
SCREEN AND MIRROR ALIGNMENTS ....................................................................................................................... 37
CIRCUIT CHECKS ........................................................................................................................................................ 38
CHAPTER 2 SPECIFIC INFORMATIONS
SETTING & ADJUSTING DATA ..................................................................................................................................... 39
LOCATION OF CONTROLS .......................................................................................................................................... 40
PROGRAMMING CHANNEL MEMORY ........................................................................................................................ 42
MECHANICAL DISASSEMBLY ..................................................................................................................................... 44
CHASSIS AND CABINET REPLACEMENT PARTS LIST ............................................................................................. 45
PC BOARDS BOTTOM VIEW ........................................................................................................................................ 63
TERMINAL VIEW OF TRANSISTORS .......................................................................................................................... 75
CIRCUIT BLOCK DIAGRAM ......................................................................................................................................... 77
SPECIFICATIONS ..................................................................................................................................................... END
APPENDIX:
CIRCUIT DIAGRAM


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GENERAL
ADJUSTMENTS
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 circum-
stances, exceed (B) kV.
Refer to table-1 for high voltage (A), (B) & AC voltage (C).
(See SETTING & ADJUSTING DATA on page 39)
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.


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GENERAL
ADJUSTMENTS
CRT ASSEMBLY REPLACEMENT AND MOUNTING
CAUTION :
DO NOT LOOSEN THE HEX HEAD BOLTS WITH SPRINGS (12 PCS), BECAUSE THOSE ARE FOR
SEALING OF CRT COOLANT.
Lens and Neck Components View
4 Screws
CRT Anode Cap Assembly
S.V.M. Coil
CRT DRIVE Board
Lens Assembly
CRT Assembly
Deflection Yoke and Conver Yoke
CRT Mounting
4 Screws
Attention Serviceman
The Hex Head
Bolts with
Springs. (see
sketch) used on
CRT assembly,
are "NOT"
Adjustment Screws
DO NOT LOOSEN-FLUID
LEAKAGE WILL OCCUR.
8 o'clock
4 o'clock
RG
B


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GENERAL
ADJUSTMENTS
TO REMOVE CRT (Same procedure for R, G, B)
1. Remove CRT DRIVE Board, S. V. M. COIL and
DEF. YOKE from CRT.
2. Remove Lens Assembly.
3. Detach CRT Anode Cap from CRT.
4. Remove CRT Assembly from CRT Mounting.
CRT REPLACEMENT (Same procedure for R, G, B)
Reverse the removal procedures except the followings.
1. Anode Cable should be replaced with new one.
See "SERVICING PRECAUTIONS" shown below.
2. Install silicon (T461B) to the CRT, replace the Anode
cable and put enough silicon again on around the An-
ode Cap as illustrated.
CAUTION: Align the Anode cable as illustrated on page
4.
ADJUSTING PROCEDURE IN REPLACING CRT
1. R.G.B. CUTOFF (SCREEN VR) ADJUSTMENT (page 6.)
2. R.G.B. FOCUS ADJUSTMENT (page 6.)
3. PICTURE TILT ADJUSTMENT (page 7.)
4. USER CONVERGENCE CENTER CHECK
(Refer to owner's manual.)
5. CENTERING ADJUSTMENT (page 7.)
6. CONVERGENCE ADJUSTMENT (page 20.)
7. WHITE BALANCE ADJUSTMENT (page 14.)
Adjustments are complete.
SERVICING PRECAUTIONS
I Check the point of anode lead in a straight
line, if it is winding, please revise it.
Anode lead holder
I Do not use a magnetized screw driver for screws
of Deflection Yoke and Velocity Modulation Coil to
avoid magnetization of electron gun.
Magnetization of electron gun will degrade basic
function and result in unbalance of right and left
shift of user static convergence, and result in no
variable quantity.
I When replacing the anode cap assembly (CRT) or
anode lead assembly (F.B.T.), remove the anode
lead holder from old one and attach the holder
again to new anode lead.
Screw
for D.Y
Screw for SVM coil
Silicon
(On shaded area)
TSE3843W #23960136
2 ~ 5 mm
15 ~ 25 mm
Anode Cap