Aiwa TV-A20S2 Service Manual
TV-A20S2
KE
SERVICE MANUAL
COLOR TELEVISION
• This Service Manual contains information about the difference between
TV-A20S2 (KEJG6CM) and TV-A205 (KER). If requiring the other information,
see Service Manual of TV-A145/A205 (KER), (S/M Code No. 09-974-180-8FP).
S/M Code No. 09-011-423-8S2
SUPPLEMENT
DATA
NOTICES BEFORE REPAIRING
To make the best use of this equipment, make sure to
obey the following items when repairing (or mending).
1. Do not damage or melt the tunicate of the leading wire on
the AC1 side, including the power supply cord.
2. Do not soil or stain the letters on the spec. inscription plates,
notice labels, fuse labels, etc.
3. When repairing the part extracted from the conducted side
of the board pattern, fix it firmly with applying bond to the
pattern and the part.
4. Restore the following items after repairing.
1) Conditions of soldering of the wires (especially, the
distance on the AC1 side).
2) Conditions of wiring, bundling of wires, etc.
3) Types of the wries.
4) Attachment conditions of all types of the insulation.
5. After repairing, always measure the insulation resistance
and perform the voltage-withstand test (See Fig-1).
1) The insulation resistance must be 7.0 to 9.5 MΩ when
applying 500V per second.
2) In the voltage withstand test, apply 3 kV for 1 or more
minutes and check that the GO lamp lights.
Insulation resistance: 7.0 to 9.5 MΩ (500 V/s)
Voltage-withstand: 3 kV for 1 or more minutes
Safety checker (Model 7110, etc.)
Earth cable
AC cable
Connect the earth cable
to the outside metal part
terminal.
* Breaking current set to 6 mA.
* Connect the safety checker as shown in Fig-1, then
measure the resistance and perform the test.
* Do not touch the equipment during testing.
* For details of the safety checker, refer to the supplied
Operation manual.
When servicing and checking on the TV, note the followings.
1. Keep the notices.
As for the places which need special attentions, they are
indicated with labels or seals on the cabinet, chassis and
parts. Make sure to keep the indications and notices in the
operation manual.
2. Avoid an electric shock.
There is a high voltage part inside. Avoid an electric shock
while the electric current is flowing.
3. Use the designated parts.
The parts in this equipment have the specific characteristics
of incombustibility and withstand voltage for safety.
Therefore, use a part which has the same character as the
replaced part. Especially as to the important parts for safety
which is indicated in the circuit diagram or the table of parts
!
with a mark, the designated parts must be used.
4. Put parts and wires in the original position after assembling
or wiring.
There are parts which use the insulation material such as a
tube or tape for safety, or which are assembled so that these
parts do not make contact with the printed board. The inside
wiring is designed not to get close to the pyrogenic parts
and high voltage parts. Therefore, put these parts in the
original positions.
5. Take care of the cathode-ray tube.
By setting an explosion-proof cathode-ray tube in this
equipment, safety is secured against implosion.
However, when removing it or servicing from the back, it
gives out shock that is dangerous. Take enough care to deal
with it.
6. Avoid an X-ray.
Safety is secured against an X-ray by giving considerations
to the cathode-ray tube and the high voltage peripheral
circuit, etc. Therefore, when repairing the high voltage
peripheral circuit, use the designated parts and do not
change the circuit. Repairing, except indicates, causes
rising of high voltage, and the cathode-ray tube emits an
X-ray.
7. Perform a safety check after servicing.
Confirm that the screws, parts and wiring which were
removed in order to service are put in the original positions,
or whether there are deteriorated portions around the places
serviced.
Fig-1
– 2 –
SPECIFICATIONS
Category
Color television
Broadcasting color system
PAL (B/G, D/K), SECAM (B/G, D/K, K1)
Television color system (Video input)
PAL, SECAM, NTSC
Receivable channel
BAND CHANNEL
E2- E12 (WEST EUROPE)
R1-R12 (EAST EUROPE)
VHF 1-9 (IVORY COAST)
S1-S20 (OSCAR CABLE CH)
S21-S23 (HYPER CABLE CH)
S24-S41 (HYPER CABLE CH)
Aerial Input
Picture Tube
Screen size
E21-E69 (EUROPE)
UHF
75 ohms, unbalanced
20"
404(W) x 480(D) x 303(H)mm
(16 x 19 x 12 in.)
3.58
, NTSC
, PAL60
4.43
Video Input/Output
1 Vp-p, 75 ohms
Audio Input
0.5 Vrms., 33 kohms more
Audio Output
0.5 Vrms., 2.2 kohms less
Speaker
103 x 45 mm (41/8 x 13/16 in.) oval
Operating Voltage
100 – 240 V AC, 50/60 Hz
Power Consumption
85W
Headphone jack
Stereo-mini jack
Operating temperature
5°C – 40°C
Operating humidity
35% – 80%
Dimensions
580(W) x 491(D) x 425(H)mm
(227/8 x 193/8 x 163/4 in.)
Weight
19 kg (41.8 lbs.)
• Design and specifications are subject to change without notice.
– 3 –
– 3 –
ELECTRICAL MAIN PARTS LIST
PART NO. KANRI
IC
86-LB4-621-010 IC,M37220M3-160SP
87-A21-133-080 IC,BMR-0101D
87-A21-377-010 IC,S-24C02BDP-1A
87-A91-538-010 RCR UNIT,SBX1981-72P
87-A20-371-080 IC,KA33V
87-A20-436-010 IC,LA7565N
87-070-080-010 IC,TA8759BN
87-017-356-010 IC,UPC1406HA
87-001-485-010 IC,TA8207K
87-017-804-010 IC,BU4052BC
87-002-779-010 IC,LA7956
87-027-656-010 IC,TC4066BP
87-070-237-010 IC,LA7832
87-A20-517-010 IC,STR-S6707
87-A21-785-010 IC,KIA7809API
87-A20-389-010 IC,NJM7809FA
87-020-881-080 IC,NJM78L05A
TRANSISTOR
87-A30-090-080 FET,2SK2541
87-A30-065-080 TR,2SC2785FE
87-A30-066-080 TR,2SA1175FE
89-334-674-580 TR,2SC3467(D/E)
87-A30-050-010 TR,2SD2499
89-320-610-080 TR,2SC2061
87-A30-041-110 TR,SE115N
89-342-174-510 TR,2SC4217 D/E
DIODE
87-A40-291-080 DIODE,1N4148M(CPT)
87-A40-349-080 ZENER,MTZJ7.5C
87-A40-001-080 ZENER,MTZJ12C
87-A40-235-080 ZENER,MTZJ9.1C
87-A40-004-080 DIODE,MTZJ16A
87-070-092-080 DIODE,S5566B
87-017-963-080 DIODE,TVR5G
!
87-017-654-060 DIODE,GBU6JL6131
!
87-070-111-060 DIODE,RU30A
87-A40-465-090 DIODE,FR202
87-017-354-080 DIODE,RU3
MAIN C.B
84-LB3-216-010 HLDR,LED
BPF201 87-A90-337-010 FLTR,SAW OFW-K2959M
BPF305 84-LB3-622-010 FLTR,BELL 2 S-10E
C1 87-018-109-080 CAP,TC U 22P-50 J SL UP050
C2 87-018-109-080 CAP,TC U 22P-50 J SL UP050
C3 87-018-109-080 CAP,TC U 22P-50 J SL UP050
C4 87-018-109-080 CAP,TC U 22P-50 J SL UP050
C5 87-018-109-080 CAP,TC U 22P-50 J SL UP050
C6 87-018-109-080 CAP,TC U 22P-50 J SL UP050
C7 87-018-123-080 CAP,TC U 220P-50 K B UP050
C9 87-018-134-080 CAP,TC U 0.01-16 N Y UP050
C10 87-010-248-080 CAP,E 220-10 M 11L SME
C11 87-010-405-080 CAP,E 10-50 M 11L SME
C12 87-018-119-080 CAP,TC U 100P-50 K B UP050
C13 87-010-544-080 CAP,E 0.1-50 M 11L SME
C14 87-010-405-080 CAP,E 10-50 M 11L SME
C16 87-018-131-080 CAP,TC U 1000P-50 K B UP050
C17 87-018-119-080 CAP,TC U 100P-50 K B UP050
C18 87-018-119-080 CAP,TC U 100P-50 K B UP050
C19 87-018-119-080 CAP,TC U 100P-50 K B UP050
C23 87-010-401-080 CAP,E 1-50 M 11L SME
C25 87-010-404-080 CAP,E 4.7-50 M 11L SME
C26 87-010-404-080 CAP,E 4.7-50 M 11L SME
NO.
DESCRIPTIONREF. NO. KANRI
REF. NO.
NO.
C27 87-010-401-080 CAP,E 1-50 M 11L SME
C28 87-010-404-080 CAP,E 4.7-50 M 11L SME
C29 87-010-404-080 CAP,E 4.7-50 M 11L SME
C30 87-018-134-080 CAP,TC U 0.01-16 N Y UP050
C40 87-018-131-080 CAP,TC U 1000P-50 K B UP050
C101 87-010-401-080 CAP,E 1-50 M 11L SME
C102 87-010-384-080 CAP,E 100-25 M 11L SME
C103 87-A10-207-080 CAP,TC U 0.01-50 K B UP050
C212 87-010-401-080 CAP,E 1-50 M 1LL SME
C213 87-010-384-080 CAP,E 100-25 M 11L SME
C214 87-018-134-080 CAP,TC U 0.01-16 N Y UP050
C218 87-018-133-080 CAP,TC U 4700P-16 N X UP050
C219 87-018-134-080 CAP,TC U 0.01-16 N Y UP050
C221 87-018-134-080 CAP,TC U 0.01-16 N Y UP050
C222 87-018-121-080 CAP,TC U 150P-50 K B UP050
C223 87-010-401-080 CAP,E 1-50 M 11L SME
C225 87-018-119-080 CAP,TC U 100P-50 J B UP050
C301 87-018-122-080 CAP,TC U 180P-50 K B UP050
C302 87-018-122-080 CAP,TC U 180P-50 K B UP050
C303 87-018-122-080 CAP,TC U 180P-50 K B UP050
C307 87-A11-148-080 CAP,TC U 0.1-50 Z F
C309 87-018-134-080 CAP,TC U 0.01-16 N Y UP050
C310 87-018-134-080 CAP,TC U 0.01-16 N Y UP050
C311 87-018-134-080 CAP,TC U 0.01-16 N Y UP050
C312 87-010-400-080 CAP,E 0.47-50 M 11L SME
C313 87-018-134-080 CAP,TC U 0.01-16 N Y UP050
C314 87-018-122-080 CAP,TC U 180P-50 K B UP050
C315 87-018-107-080 CAP,TC U 18P-50 J SL UP050
C316 87-018-131-080 CAP,TC U 1000P-50 K B UP050
C320 87-010-529-080 CAP,E 1-50 M BP
C327 87-010-101-080 CAP,E 220-16 M 11L SME
C328 87-018-195-080 CAP,TC U 1200P-16 M X UP050
C329 87-010-401-080 CAP,E 1-50 M 11L SME
C330 87-018-124-080 CAP,TC U 270P-50 K B UP050
C332 87-010-403-080 CAP,E 3.3-50 M 11L SME
C335 87-010-380-080 CAP,E 47-16 M 11L SME
C336 87-018-134-080 CAP,TC U 0.01-16 N Y UP050
C344 87-010-400-080 CAP,E 0.47-50 M 11L SME
C348 87-018-134-080 CAP,TC U 0.01-16 N Y UP050
C349 87-018-134-080 CAP,TC U 0.01-16 N Y UP050
C350 87-018-123-080 CAP,TC U 220P-50 J B UP050
C351 87-010-401-080 CAP,E 1-50 M 11L SME
C352 87-010-401-080 CAP,E 1-50 M 11L SME
C354 87-018-134-080 CAP,TC U 0.01-16 N Y UP050
C356 87-018-122-080 CAP,TC U 180P-50 K B UP050
C372 87-010-404-080 CAP,E 4.7-50M 11L SME
C373 87-018-115-080 CAP,TC U 47P-50 J SL UP050
C374 87-018-134-080 CAP,TC U 0.01-16 N Y UP050
C375 87-018-134-080 CAP,TC U 0.01-16 N Y UP050
C376 87-018-134-080 CAP,TC U 0.01-16 N Y UP050
C377 87-010-260-080 CAP,E 47-25 M 11L SME
C378 87-010-405-080 CAP,E 10-50 M 11L SME
C399 87-A11-148-080 CAP,TC U 0.1-50 Z F
C403 87-010-384-080 CAP,E 100-25 M 11L SME
C404 87-010-401-080 CAP,E 1-50 M 11L SME
C405 87-010-401-080 CAP,E 1-50 M 11L SME
C406 87-010-401-080 CAP,E 1-50 M 11L SME
C409 87-010-260-080 CAP,E 47-25M 11L SME
C410 87-010-384-080 CAP,E 100-25 M 11L SME
C411 87-010-384-080 CAP,E 100-25 M 11L SME
C413 87-010-260-080 CAP,E 47-25 M 11L SME
C414 87-010-260-080 CAP,E 47-25 M 11L SME
C415 87-010-529-080 CAP,E 1-50 M BP
C416 87-010-529-080 CAP,E 1-50 M BP
C417 87-010-260-080 CAP,E 47-25 M 11L SME
C419 87-010-384-080 CAP,E 100-25 M 11L SME
C420 87-015-997-090 CAP,E 2200-16 M 11L SME
C421 87-010-381-080 CAP,E 330-16 M 11L SME
C422 87-010-381-080 CAP,E 330-16 M 11L SME
C451 87-010-402-080 CAP,E 2.2-50 M 11L SME
DESCRIPTIONPART NO.
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