FILE NO. 073-200312
SERVICE MANUAL
SUMMARY
N3WS Chassis
COLOR TELEVISION
PUBLISHED IN JAPAN,
Jun., 2003
So
34HFX83
(TAC0321)
34HFX83 is the same as 34HF83 except for the parts tabled on back of this sheet.
Use this service manual together with the service manual of 34HF83 (File No. 070-200307).
REPLACEMENT PARTS LIST DIFFERENCES
Location
No.
Part No.
Description
A201
23532042
Cover, Front Cover Assy
A401S
23532044
Cover, Back Cover Service
A701A
23067345
Carton, Top Case
C903
24436221
CD, 220pF
C905
24436221
CD, 220pF
C907
24436221
CD, 220pF
C909
24679330
EL, 33?F,
±20%, 250V
C913
24763102
EL, 1000?F,
±20%, 16V
C914
24092398
CD, 0.1?F, +80%, -20%, 25V
C918
24092398
CD, 0.1?F, +80%, -20%, 25V
C919
24092398
CD, 0.1?F, +80%, -20%, 25V
C963
24436331
CD, 330pF
C964
24436331
CD, 330pF
C965
24436331
CD, 330pF
C970
24214102
CD, 1000pF,
±10%, 500V
D916
23357012
Diode, 1SS244
D917
23357012
Diode, 1SS244
D918
23357012
Diode, 1SS244
D919
23357012
Diode, 1SS244
D926
23357012
Diode, 1SS244
D927
23357012
Diode, 1SS244
D928
23357012
Diode, 1SS244
D929
23357012
Diode, 1SS244
D949
23357012
Diode, 1SS244
D950
23357012
Diode, 1SS244
D951
23357012
Diode, 1SS244
D952
23357012
Diode, 1SS244
G908
24366560
CF, 56 ohm
G914
23118859
Diode, 1SS133
G915
23118859
Diode, 1SS133
G923
24366560
CF, 56 ohm
G924
23118859
Diode, 1SS133
G925
23118859
Diode, 1SS133
G941
24366560
CF, 56 ohm
G947
23118859
Diode, 1SS133
G948
23118859
Diode, 1SS133
G951
24366102
CF, 1k ohm
G966
24366102
CF, 1k ohm
G9880
24366102
CF, 1k ohm
H002
23148043
Module, IF, US WOW
MSP3441G VDS, MVUS52
* L901
23289120
Coil, Peaking, TRF4120A
L902
23289689
Coil, Peaking, TRF46R8AF
L903
23289689
Coil, Peaking, TRF46R8AF
L904
23289689
Coil, Peaking, TRF46R8AF
L905
23289835
Coil, Peaking, TRF41R5AT
L906
23289835
Coil, Peaking, TRF41R5AT
L907
23289835
Coil, Peaking, TRF41R5AT
L908
23237987
Coil, Peaking, TRF4100A
L910
23103146
Coil (Ferrite Bead), TEM2030AA
L916
23289120
Coil, Peaking, TRF4120A
L924
23289120
Coil, Peaking, TRF4120A
Q901
23205159
Transistor, 2SC3942
Q902
23205165
Transistor, 2SC3950E
Q903
23205159
Transistor, 2SC3942
Q904
23205165
Transistor, 2SC3950E
Q905
23205159
Transistor, 2SC3942
TOSHIBA CORPORATION
1-1, SHIBAURA 1-CHOME, MINATO-KU, TOKYO 105-8001, JAPAN
Location
No.
Part No.
Description
Q906
23205165
Transistor, 2SC3950E
Q930
23205158
Transistor, 2SC3790E
Q931
23205156
Transistor, 2SA1480E
Q933
23205158
Transistor, 2SC3790E
Q934
23205156
Transistor, 2SA1480E
Q936
23205158
Transistor, 2SC3790E
Q937
23205156
Transistor, 2SA1480E
Q961
23114433
Transistor, 2SC1815-Y
R901
24552101
OMF, 100 ohm, 1/2W
R902
24552101
OMF, 100 ohm, 1/2W
R903
24552101
OMF, 100 ohm, 1/2W
R907
24366560
CF, 56 ohm
R913
24366560
CF, 56 ohm
R914
24366101
CF, 100 ohm
R915
24366150
CF, 15 ohm
R916
24366330
CF, 33 ohm
R917
24366271
CF, 270 ohm
R918
24366330
CF, 33 ohm
R921
24366101
CF, 100 ohm
R922
24366150
CF, 15 ohm
R924
24366330
CF, 33 ohm
R925
24366271
CF, 270 ohm
R928
24366101
CF, 100 ohm
R929
24366150
CF, 15 ohm
R930
24366330
CF, 33 ohm
R933
24545829
FR, 8.2 ohm, 1/4W
R937
24366271
CF, 270 ohm
R940
24366560
CF, 56 ohm
R942
24366222
CF, 2200 ohm
R943
24366222
CF, 2200 ohm
R944
24366222
CF, 2200 ohm
R945
24366330
CF, 33 ohm
R946
24366330
CF, 33 ohm
R952
24366222
CF, 2200 ohm
R953
24366222
CF, 2200 ohm
R954
24366222
CF, 2200 ohm
R958
24366101
CF, 100 ohm
R961
24568472
Cement, 4700 ohm, 7W
R962
24568472
Cement, 4700 ohm, 7W
R964
24568472
Cement, 4700 ohm, 7W
R965
24568472
Cement, 4700 ohm, 7W
R966
24366331
CF, 330 ohm
R977
24366681
CF, 680 ohm
R978
24568472
Cement, 4700 ohm, 7W
R979
24568472
Cement, 4700 ohm, 7W
R980
24552101
OMF, 100 ohm, 1/2W
R981
24552101
OMF, 100 ohm, 1/2W
R982
24552101
OMF, 100 ohm, 1/2W
R9180
24366220
CF, 22 ohm
R9240
24366220
CF, 22 ohm
R9300
24366220
CF, 22 ohm
* U001
23788935
SIGNAL Board, PD1086C
* U004
23788433
CRT-D/SVM Board, PD1089
Y101
23566019
Owner's Manual, English/
French, 34HFX83
* Y160
23306504
Remote Hand Unit, CT-90164
FILE NO. 070-200307
SERVICE MANUAL
COLOR TELEVISION
N3WS Chassis
34HF83
PUBLISHED IN JAPAN.
May. 2003
So
(TAC0322)
2
GENERAL
ADJUSTMENTS
TABLE OF CONTENTS
CHAPTER 1 GENERAL ADJUSTMENTS
SAFETY INSTRUCTIONS ........................................................................................................................................ 3
SET-UP ADJUSTMENT ............................................................................................................................................ 4
SERVICE MODE ...................................................................................................................................................... 6
ELECTRICAL ADJUSTMENTS ................................................................................................................................ 9
CIRCUIT CHECKS ................................................................................................................................................. 11
CHAPTER 2 SPECIFIC INFORMATIONS
SETTING & ADJUSTING DATA .............................................................................................................................. 12
LOCATION OF CONTROLS ................................................................................................................................... 13
ADDING CHANNELS TO THE TV'S MEMORY ...................................................................................................... 15
CHASSIS AND CABINET REPLACEMENT PARTS LIST ......................................................................................16
PC BOARDS BOTTOM VIEW ................................................................................................................................. 31
TERMINAL VIEW OF TRANSISTORS ................................................................................................................... 40
CIRCUIT BLOCK DIAGRAM .................................................................................................................................. 42
SPECIFICATIONS .............................................................................................................................................. END
APPENDIX:
CIRCUIT DIAGRAM
3
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 hazardous
X-RAY RADIATION. To avoid such hazards, the high volt-
age 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 120V AC
power source. The high voltage must not, under any cir-
cumstances, exceed (B) kV.
Refer to table-1 for high voltage (A), (B).
(See SETTING & ADJUSTING DATA on page 12)
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. This receiver is equipped with a Fail Safe (FS) circuit which
prevents the receiver from producing an excessively high
voltage even if the B+ voltage increases abnormally. Each
time the receiver is serviced, the FS circuit must be checked
to determine that the circuit is properly functioning, follow-
ing the FS CIRCUIT CHECK procedure in this manual.
3. 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.
4. 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
Connect a 1500 ohm 10 watt resistor, paralleled by a 0.15
µF, AC type capacitor, between a known good earth ground
(water pipe, conduit, etc.) and the exposed metallic parts,
one at a time. Measure the AC voltage across the combi-
nation of 1500 ohm resistor and 0.15
µF capacitor. Re-
verse the AC plug at the AC outlet and repeat AC voltage
measurements for each exposed metallic part. Voltage
measured must not exceed 0.3 volts rms. This corresponds
to 0.2 milliamp. AC. Any value exceeding this limit consti-
tutes a potential shock hazard and must be corrected im-
mediately.
WARNING : Service should not be attempted by anyone unfa-
miliar with the necessary precautions on this receiver. The fol-
lowing 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 serv-
ice is performed on the receiver.
2. Always discharge the picture tube anode to the CRT con-
ductive coating before handling the picture tube. The pic-
ture tube is highly evacuated and if broken, glass frag-
ments will be violently expelled. Use shatter proof gog-
gles and keep picture tube away from the unprotected body
while handling.
3. When replacing a chassis in the cabinet, always be cer-
tain that all the protective devices are put back in place,
such as; non-metallic control knobs, insulating covers,
shields, isolation resistor-capacitor network etc.
4. Before returning the set to the customer, always perform
an AC leakage current check on the exposed metallic parts
of the cabinet, such as antennas, terminals, screwheads,
metal overlays, control shafts etc. to be sure the set is
safe to operate without danger of electrical shock. Plug
the AC line cord directly into a 120V AC outlet (do not use
a line isolation transformer during this check). Use an AC
voltmeter having 5000 ohms per volt or more sensitivity in
the following manner:
AC VOLTMETER
0.15
µF
Good earth ground
such as a water
pipe, conduit, etc.
Place this probe on
each exposed
metallic part.
1500 ohm
10 watt
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 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 characteristics as specified in the parts list may create shock, fire, X-ray radiation
or other hazards.