TV3K - TXT
COLOUR TELEVISION RECEIVER
SERVICE MANUAL
SECIFICATION
z SYSTEM PAL/SECAM,B/G,I.
z POWER INPUT AC 170-245V(50/60Hz)
z POWER CONSUMPTION 60W
z AERIAL IMPEDANCE 75OHM UNVALANCED
z TUNER VOLTAGE SYNTHESIZER TUNING
z RECEIVING CHANNELS VHF-L E2-S6
VHF-H S7-S41
UHF E21-E69
z PROGRAMME MAX.99 PROGRAM MEMORIES
z PICTURE TUBE 14”,20”,21”;90°
z SOUND OUTPUT 2.0W
z SPEAKER 3W 8 OHM
z AV JACKS FULL SCART ×1
CAUTION: Before servicing the chassis, read the “Safely Precaution”.
“X -Ray radiation Precaution” and “Product Safety Notice” in this manual.
X-RAY RADIATION PRECAUTION
1. Excessive high voltage can produce potentially hazardous X-RAY RADIATION. To
Avoid such hazards the high voltage must be specified limit. The normal value of the
high voltage of this receiver is 24.5KV +/-2KV under 230V AC power source. The
high voltage must not exceed 27KV.
2. Each time a receiver requires servicing the high voltage should be checked following
the HIGH VOLTAGE CHECK procedure in this manual. It is recommended the
reading 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.
3. The primary source of X -RAY RADIATION in this TV receiver is the picture tube. For
continued X-RAY RADIATION protection, the replacement tube must be exactly the
same type tube as used in this TV receiver.
4. Some parts in this receiver have special safety-related characteristics for X-RAY
RADIATION protection. For continued safety, parts replacement should be
undertaken only after referring 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. Since the power supply circuit of this receiver is directly connected to the AC
power line. An isolation transformer should be used during any dynamic service to
avoid possible shock hazard.
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 shatterproof 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: nonmetallic control; knobs, insulating covers,
shields, isolation resistor-capacitor, network, etc.
4. When replacing parts or circuit boards, disconnect the power cord.
5. When replacing a high voltage resistor (metal oxide resistor) on circuit hoard,
keep the resistor APP. 10mm(1/2 in.) away from circuit board.
6. Connection wires must be kept away from components with high voltage or high
temperature.
7. If any fuse in this TV receiver is blown, replace it with the FUSE specified in the
chassis parts list.
8. The receiver is designed to operate with 230V(50Hz) AC mains.
PRODUCT SAFERY NOTICE
Many electrical and mechanical parts in this chassis have special safety-related
characteristics are often passed unnoticed by a visual inspection and the X-RAY
RADIATON protection afforded by them cannot necessarily be obtained by using
replacement components rated for higher voltage. The use of substitute replacement
parts that do not have the same safety characteristics as specified in the parts list may
create shock, fire, X-RAY RADIATION or other hazards.
GENERAL ADJUSTMENT
AUTOMATIC DEGAUSSING
An automatic degaussing coil is attached around the picture tube, degaussing the tube
properly in about one second after the set is switched on. If the receiver is moved or
faced on a different direction, the power must be switched off at least 15 minutes in
order that the automatic degaussing circuit operated properly. External degaussing is
necessary if the automatic degassing proves ineffective after the set is moved.
B+ ADJUSTMENT
CAUTION: To avoid X-ray hazards and result in a nominal display width, B+ voltage
must be set in the scale of 108.0V+/-0.5V.
1. Make sure the AC power supply is 230V, 50Hz.
2. Switch on the TV receiver, tune in an active channel.
3. Measure the voltage between C641 on Main P.C. Board by DC voltmeter.
4. Set contrast, brightness, color to maximum.
5. Adjust VR631 on Main P. C. Board for B+108.0V+/-0.5V voltage reading.
HIGH VOLTAGE CHECK
CAUTION: There is no high voltage adjustment in this chassis, B+108V voltage
directly relates to the high voltage. The high voltage does not exceed 27KV under any
conditions.
1. Connect an accurate high voltage meter to the second anode cap of the picture
tube.
2. Turn on the receiver, set brightness and contrast to minimum (Zero beam current).
3. Make sure the high voltage does not exceed 27KV.
4. NO matter whether the luminance, contrast and chrominance controls are set to
maximum or minimum, the high voltage must be kept under 27KV.
FOCUSING
Receive a TV test pattern signal; adjust controls for optimum picture. Adjust Focus
Control for a well-defined, sharpest display in the center area of the screen.
ADJUSTMENT AND SERVICING THE CHASSIS
SERVICE MODE
To enter the service mode, a special remote control which contains an additional
SERVICE key must be used. See the illustration. Press the ‘SERVICE’ key on remote
control, TV will display service menu as following table 1 line by line. To select the
parameter by using the ‘P+/P-’ keys. To adjust the selected parameter by using the
‘V+/V-’ keys. To quit the service mode, press the ‘P.P.’ key on remote control when in
the service mode.
Table 1
Parameter Value
Red Gain 32
DC Red 063
Green Gain 32
DC Green 063
Blue Gain 32
DC Blue 063
Apr Threshold 12
Logo 6------------
To enter the table 2, press the ‘OK’ key for
the first time on the remote control when in
the service mode.
Table 2
Parameter Value
Tuner AGC 22
H position 32
VPOS 50 10
VPOS 60 10
VAMP 50 47
VAMP 60 53
Bright max 63
Bright min 00
Sub Tint 32
VCO Coarse 05
VCO Fine 063
VCO Coarse L1 05
VCO Fine L1 080
To enter the table 3, press the ‘OK’ key for
the second time on the remote control
when in the service mode.
Table 3
Parameter Value
AGC gain 00
Option 1 48
Option 2 00
Option 3 06
Option 4 09
Option 5 00
ST Ttext 00
H POS OSD 001
V POS OSD 01
H POS TXT 057
V POS TXT 04
Following are the items of the OPTIONS in
more details.
OPTION1:
B5=P/N/S Crystals application (0=2
crystals, 1=1 crystal)
B4=Cutoff Loop (0= OFF, 1=ON)
B3=Safety_Reset (0=Active, 1=non)
B2=Super Tuner (0=OFF, 1=ON)
B1=Sound Demodulation (0=
Intercarrier/MONO, 1=QSS/NICAM)
1
5
9-/--
678
¢ñ¢ò
/
234
B0=Logo Display (0=OFF, 1=ON)
OPTION2: (It’s better to keep the default setting option2=0)
B5=Half_Contrast (0=OFF, 1=ON)
B4=Color 6db (0=OFF, 1=ON)
B3=APR Feature (0=ON, 1=OFF)
B2=Black Stretch (0=ON, 1=OFF)
B1=Auto Flesh (0=ON, 1=OFF)
B0=Coring (0=ON, 1=OFF)
OPTION3:
B5=AVL (0=OFF, 1=ON)
B4=PIF Over modulation (0=OFF, 1=ON)
B3=Market_France-SECAM L/L’ (0=OFF, 1=ON)
B2=Manual/Auto Cutoff (0=Manual, 1=Auto Cutoff)
B1=Mute pin Low/High To control the speaker (0=Low, 1=High)
B0=TDA7449/TDA7439 (0=TDA7449, 1=TDA7439)
OPTION4:
B4=SCART2 (0=OFF, 1=ON)
B3=RGB (0=OFF, 1=ON)
B2=SVHS (0=OFF, 1=ON)
B1=AV2 (0=OFF, 1=ON)
B0=AV1 (0=OFF, 1=ON)
OPTION5 and ST Ttext is for teletext setting only. It normally could not be changed. If
it’s necessary to adjust the OPTION 5, please read the following information before
adjustment.
A. For CPUs with English, French, German, Polish or English, French, German, Turkish,
Please refer to the setting as below.
1. If OPTION 5 = 00, then the TEXT languages like "ENGLISH, FRENCH, SWEDISH,
TURKISH, GERMAN, PORTUGUESE, ITALIAN, RUMANIAN " can be decoded.
2. If OPTION 5 = 02, then the TEXT languages like "POLISH, FRENCH, ESTONIAN,
CZECH, GERMAN, SERBIAN, LETTISH, RUMANIAN " can be decoded.
3. If OPTION 5 = 04, then the TEXT languages like "ENGLISH, FRENCH, SWEDISH,
CZECH, GERMAN, PORTUGUESE, LETTISH, RUMANIAN " can be decoded.
4. If OPTION 5 = 06, then the TEXT languages ENGLISH, FRENCH, SWEDISH, TURKISH,
GERMAN, PORTUGUESE, LETTISH, RUMANIAN can be decoded.
B. For coming new OTP/CPU with English, Russian, Czech, Polish, the setting of the OPTION
5 will be changed as below.
1. If OPTION 5 = 00, then the TEXT languages like "ENGLISH, FRENCH, SWEDISH,
CZECH, GERMAN, PORTUGUESE, ITALIAN, RUMANIAN " can be decoded.
2. If OPTION 5 = 02, then the TEXT languages like "ENGLISH, RUSSIAN, SWEDISH,
TURKISH, GERMAN, PORTUGUESE, ITALIAN, RUMANIAN " can be decoded.
3. If OPTION 5 = 04, then the TEXT languages like "POLISH, RUSSIAN, SWEDISH,
CZECH, GERMAN, SERBIAN, ITALIAN, RUMANIAN " can be decoded.
4. If OPTION 5 = 06, then the TEXT languages like "POLISH, RUSSIAN, SWEDISH,
CZECH, GERMAN, PORTUGUESE, ITALIAN, RUMANIAN can be decoded.
Normally, it is supposed not to set OPTION 5 = 01. If you set the OPTION 5 = 01, then the font
can be switched by press key MENU on remote control in TEXT mode for TV3K. If you set
OPTION 5 = 00, 02, 04, 06, then there is no any activity while press MENU in TEXT mode.
Please check.
A.F.C. ADJUSTMENT
Removing any R.F. signal source and prevent any stray signal source from entering
the tuner by shorting the tuner input inner contact to the out screen.
Inject the 38.9 MHZ carrier into the tuner IF output pin (pin 11).Select the parameter
‘VCO Coarse’ in the service mode (see Table 2).The ‘VCO Status…’will appear on the
screen. Then press the ‘AV’ key on remote control, the CPU will adjust automatically
until the ‘VCO Status OK’ appears on the screen. If this can not be achieved, i.e. there
is no any pattern on the screen, please adjust the T201 first until a stable pattern
appears on the screen. And then press the ‘AV’ key on remote control. The CPU will
adjust automatically once again until the ‘VCO Status OK’ appears on the screen.
GEOMETRY
To adjust the picture position and vertical size, select the appropriate parameter in the service
mode and adjust as necessary. Please see table 2.
Remote control
29 DIRECTIVTY 6m(MIN) 8m(NOR
)OK
30 DIRECTIVTY 30°FROM LIGHT AXIS 5m(MIN) 7m(NOR
)OK
C314
10n 1K6V M(14"21")/11n 1K6V M(20")
C310
47n/M
Q301
2SC2383
Q302
2SD1651
R309
8K2(14")10K(20"21")
T301
JDT1924
C242 10uF 16V
C122 0.1uF/M
C244 10uF 16V
R215
4K7
R216
27K
C243 10uF 16V
R300
4K7
C208 22uF 50V
12345678910 11
IC301
TDA8174A
L301
HL105uH
C312
2.2uF 160V
C311
0.47uF 200V M(14")/0.33uF 200V M(20"21")
R323
10KR304
150K
R303
150K R319
4K7
R324
180
R329
3K3
R320
2E2
R318
1K8
C324
0.1uF/M
R327
2E2
C325
100uF 35V
D301
1N4002
7
T302
BSC25-3604L
R310
1/0.5W
C309
47n/M
C304
0.1uF/M
D307
1N4148
R307
1K
C317
470P 500V
D304 RGP15J
SV
FV
HV
R328
680
D351
1N4148
D305
RGP15D/1N4937
R326
270/0.5W
C326
1000uF 25V
C323
22uF 16V
R325
22K
C215
47uF 16V
XP202
XS202
+8V
FLYV
VCC1
VP
Vout
BC
GND
POWER
VCC2
V.S YNC I N
V AMP
R316
E47/0.5W
R302
27/0.5W
Q351
2SC1815Y
R352
3K9
R353
12K
R351
100K
C352
1uF 50V
+8V
C306
220uF 35V
+5V
+110V
Q101
2SA1015Y
Q102
2SA1015Y
Q103
2SA1015Y
R120
2K7
R121
2K7
R122
2K7
D105
1N4148
D102
1N4148
D103
1N4148
R125
4K7
R123
2K7
R124
2K7
C108
0.1uF
C117
0.22uF/M
Q106
2SC1815Y
1
2
3
4 5
6
7
8
IC102
ST24C08
C107
0.1uF
RGB
+5V
I R +5VA
C128
22uF 16V
R110
4K7
R128
6K8
R109
10K
R105
4K7
+5VA
R111
4K7
R112
6K8
R106
4K7
C106
100uF 16V
R103
5K6
R104 6K8
C104
220p
C140
0.1uF
C102
4n7/M C101
22pF
+5VA
R101 5K6
L101
10uH
ST92195
IC101
R137
820
R268
27K
C263 4n7/M
C268
0.1uF/M
X201 4.43MHz
C269
18pF
C271
0.1uF
R116
15K C109
2n2/M
C141
0.01uF
C111
82PF
C112
0.47uF 50V
R119 5K6
C114
4n7/M
C126
22pF
C142
0.01uF +5VA
X101
4M
C116
39pF
C115
39pF
R126
1K R140
39K
Q104
2N3904
+33V
+5VA
R130
33K
R131
22K
R132
33K
C120
0.1uF/M
C121
0.1uF/M
R133
33K
R127 1K
R143 1K
R142 470
R141 680
C209
0.33uF/M
C211
1n
R212
150
14
5
10
C225
0.1uF C227
0.1uF
C226
0.1uF
R225
75 R226
75 R227
75 R228
75
R333
8M2
B
G
R
FB
SDA
SCL
C300
47n/M
+25V
R314
15K
R301
39
C307
10uF 250V
C105
10uF 16V
R129
10K
R118 10
R117
10 +5VA
FBi
Ri
Gi
Bi
VD
TUNER AGC
TUNER AGC
FLYB
HD
IF
VT
BSW2
BSW1
CVBS.TXT
BSW2
BSW1
VS
HS
C129
0.01uF
V0L
S-SW
ON/OFF
VAMP
BCL
VAMP
+5VA
ICA
C100
100P
C241
1n
AGC
VT
BC
BB
BA
VM
IF2
IF1
TU201
UVC2810-VEEA
P+
P-
MENU
SIF IN
ALTERNATIVE CRTS
C302
220uF 16V
C305
10uF 16v
D311 1N4002
D310 1N4002
+25V
+15V
1
R312 1K/1W
D302 RGP15J
R311
10K/0.5W
R157
10K
D107
1N4148
ON/OFF
R135
10K
+5VA
S0
R102 10
C110
10uF 16V
C113
10uF 16V
D106
LED
3
11
10
1
2
C239
47P
R805
560
C825
47P
C247
0.1uF
R138
1K5
D253
1N4148
XS302 XP302
X202 3.58MHz
C270
18pF
CRT
14 INCH CRT
C521 4700pF 2KV
R516
100
R518
330
Q506
BF422
C515
470pF
C516
680pF 500V
D508
1N4007
R519
1K2/0.5W
R520
10K
1
R521
2K2/0.5W
C511
680pF 500V
D504
1N4007
1
R515
2K2/0.5W
C517
680pF 500V
D501
1N4007
1
R506
2K2/0.5W
Q507
BF423
+8V
+8V
R508
4K7
Q503
2SA1015Y
R509
100
C506
100uF16V
R510
100
R512
330
Q504
BF422
C510
470pF
R513
1K2/0.5W
R514
10K
Q505
BF423
R502
100
R504
330
Q501
BF422 C505
470pF
R501
1K2/0.5W
R505
10K
Q502
BF423
2
R522
10K/2W
2
R523
10K/2W
2
R524
10K/2W
D503
5V6
R507
47K
XP305
XS3054
1
2
1
4
58
9
10
11
12
14
13
7
6
T603
BCK-35-26
Q613
2SD1710
2
R625
68/2W
C616
680pF 2KV
R630
5M6/0.5W
R629
5M6/0.5W
C629
2200PF 400VAC
Q612
2SC3807
C617
22n/M
2
R624
68
C615
15n/M
R615
22K
R622
15K
R621
120K/0.5W
R620
120K/0.5W
R619
22 C614
0.1uF/M
R617
3K3
IC615
TLP621
C613
4n7/M
D603
1N4007
C603
1n 1KV C607
100uF 400V
D614
1N4148
D617
ES1/RGP10G
D616
1S1555
R611
5K6
Q611
2SA1015Y
5
R602
3E9/5W
RT601
MZ73 K18RM270
T601
ET2868
C601
0.22uF/250VAC
F601
T3.15A
SW602
KDCA11-WMO-P
XP601
XS601
XS602
L606
DEGAUSSING
C634
680pF 500V
D634
RGP15D/1N4937
D631
RG2
C631
470pF/1KV
C633
1000uF 25V
C641
100uF 160V
Q631
2SC1815Y
R635
150K
R636
8K2
VR631
2K
D641
6V2
R637
100K
R639
12K
1
R638
27K/0.5W
Q686
2SA1015Y
R689
22K
R688
10K
R686
300K
R687
270K
Q685
2SC1815Y
C685
1uF 50VD685
6V2
R642
15K
R626
2K7
+33V
+108V
2
R608
12K/2W
IC604
UPC574
C608
1uF 50V
Q609
B892
R647
1K/0.5W
+8V
Vout
GND
Vin
IC601 7805 +5VA
C602
0.1uF/250VAC
D619
MTZ11C
R623
2K7
1
2
4
3
C636
0.1uF
C654
470uF 25V
C652
100uF 25V
Vout
GND
Vin
IC602 7805
Vout
GND
Vin
IC603
7808 C653
10uF 16V
C656
10uF 16V
+5V
+25V
C327
0.1uF
R648
10/1W
1
R399 2E2 2W(14"20")/6E8 1W(21")
C333
220uF 35V
1
2
XP600
POWER CORD
XS600
D604
1N4007
D605
1N4007
D606
1N4007
R650
18E/5W
XS301 XP301
V-DY
H-DY
C605
1n 1KV
C604
1n 1KV C606
1n 1KV
C627
0.1uF
SAW
SF201
K6257K
1
R330
330/1W R334
1/0.5W
+15V
+15.2V
R321
180K/0.5W
R281
100
R526 22E
K101
2 1
3
IC103
HS0038A2
+5VA
K102
K103
K104
K107
K105
K106
R144 1K5
R145 120
R146 270
R147 2K2
R463
10K
R462
680
R152
22K C470
0.1UF
C410
470UF/25V
C466
330PF
C471
0.1UF
C468
0.1UF
C467
470UF/16V
SPEAKER
+18V
XS401
XS402
R151
4K7
R460
3K3
R468
6K8
R464
4.7
C463
10uF
C462
1UF
C472
47UF
C475
100PF
C465
47n/M
C474
10UF
C461
1000pF C464
10uF
+18V
C802
10n
C801 10uF
C803
10n
C805
220n
C808
10p
C809
10uF
C815
10n
C811 1n
C816
10uF
C81210uF
C819
22p
C822
0.1uF C817
10uF
C820
22p
R803
220K
R804
20k
X801 27M
Q802 2SA1015
C821
10n
C818100n/M
SIF IN
C823
10u
R431
1K
R467
10K
SCL
SDA
R801
39
R830
100
R831
100
C473
0.1UF
L802
22UH
C804
10n
L401
100UH
C81010uF
L214
8.2uH
L212
8.2uH C831
10uF
C832
10uF
C291
1n
C297
1n
L211
8.2uH
L213
8.2uH
C437
1UF
C442
1UF
R210
100k
R410
220
AROTV
ARI1
ALI1
ALOTV
S-SW
Gi
Ri
FBi
VIDEO IN2
Bi
142
22
21
11 32
41
40
39
38
37
36
35
34
33
10
9
8
7
6
5
4
3
2
12
13
14
15
16
17
31
30
29
28
27
26
25
24
2320
19
18
AVCC
ARO
ALO
AV5A
SRO
SLO
CAP7
RST
NC
NC
NC
NC
NC
CAP1
CAP2
ARIN
ALIN
GND4
SRIN
SLIN
CAP8
MIN
MOUT
GND3
AV5B
CAP6
SIF
CAP5 GND2
DV
REG
CAP3
NC
SCL
SDA
NU
XIN
XOUT
GND1
DCL
NC
NC
IC801
STV8203A
AUDIO OUT
L803
22UH
D410
11V
123456789
VCC1
IN
MUTE
VOL
FILTER
FB
GND
OUT
VCC2
IC411 AN5265
R493
10K
R492
680 C496
330pF
C497
470UF/16V
R494
4.7
C493
10uF
C492
1UF
C472
0.1uF
C495
47n/M
C491
1000pF C494
10uF
+12V
R432
1K
123456789
VCC1
IN
MUTE
VOL
FILTER
FB
GND
OUT
VCC2
IC412 AN5265
Q410
2SC1815
Q411
2SC1815
R469
22K
R470
10K
R471
6K8
R472
6K8
1
2
3
4
5
6
7
8 9
10
11
12
13
14
15
16
-E
VEE S0
1Y3
GND S1
1Y0
2Y1
2Y0 VCC
1Y22Y2
2Z
2Y3 1Z
1Y1
IC401
4052
ALOTV
AROTV
S0
AROTV
AR/OUT
ARI1
ALOTV
AL/OUT
ALI1
AROUT
MUTE
VOL
MUTE
ALOUT
VIDEO OUT
Q425
2SC1815
C476
0.1UF
C499
47UF
Q423
2SC1815
Q424
2SC1815
Q420
2SC1815
Q421
2SC1815
C420
10UF
C422
10UF
R425
10K
R421
22K
R420
10K
S0
R428
1K
R429
1K
R435
1K
R436
1K
+8V
VT
SAW1
XS411
XS412
RCA1-1
RCA1-2
RCA1-3
RCA2-1
L410
8.2UH
L411
8.2UH
R485
220
R486
100K
R487
220
R488
100K
C478
1UF
C479
1UF
XS410
RCA2-3
RCA2-2
AL1I
AR1I
VIDEO IN2
ALOUT
AROUT
VIDEO OUT
Q428
2SC1815
Q426
2SC1815
ASW3
ALI2
ARI2
VIDEO IN3
D413
1N4148
Q427
2SA1015Y
R497
10K
D412
1N4148
C469
470uF/25V
1
R631
1/1W
2
R446
2E2/2W
D635
RGP15D/1N4937
C632 470pF/500V
C635
1000uF25V
R640 1K/0.5W
Q632
B892
GND
+18V
C201 1n
SAW
SF202
K9650M
R286 22K
R283
2K2
R284
10K R282
6K8
R285
2K2
Q281
2SC1815Y
D281
1N4148
SAW1
C284 1n
R200
22K
R290
2K2
R289
10K
R288
6K8 R287
2K2
Q282
2SC1815Y
D282
1N4148
+8V
SAW2
1
23
4
5
SAW2
IF
R306
68/0.5W
R308
100/0.5W
OK
V-
V+
AV
+5VA +12V
Q107
2SC1815Y
R159
3K3 R158
2K2
R134
10K
+12V
D108
1N4148
MUTE
C281
6P8
TV AV1/RGB
+5V
R422
6K8 R426
10K
Q422
2SC1815
R461
22K
+5V
+8V
+15V
+5V
+12V
C360
47uF 160V
L600
GL100uH
D101
3V9
R114
470
+5VA
Q105
2SA1015Y
R100 270
R136 100K
D100
1N4148
R115
4K7
C119
1uF 50V
C118 47pF
C824
56pF
L804
10uH
C498
22uF/25V
56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29
28
27
2625
242322
21
20
19
18
171615
14
1312
11
10
9
87
6
5432
1
SIF I N1
SIF I N2
AGC(S)CAP
Vrefif
AGC(P)CAP
PIF I N1
PIF I N2
RAGC O UT
IF PLL
IF GND
AM/FM OUT/ SC
IF VCC
CVBS OUT
EXT AUDIO I N
PIFIC1
PIFLC2
VCC2
CVBS IN 1
GND2
CVBS IN 2
BS
Y/CVBS I N3
CHR
Text
BEXT/UEXT
GEXT/YEXT
REXT/VEXT
FBEXT NC
BOUT
GOUT
ROUT
ICATH
BOSD
FM C AP
AUDIO OUT
GNDD
VCCD
SDA
SCL
SLPF
LFB/S SC
H OUT
VERT
BCL/SAF
VCC1
CVBS OUT1
GND1
X1/VAMP/CHROUT
CJPF
XTAL1
XTAL2
XTAL3/BTUN
FBOSD/HC
ROSD
GOSD
IC201
STV2246/2248
KB INPUT
NC
VS OUT
STDBY LED
STDBY LED
XTAL
XTAL
VOL(N)
VOL
NC
SAW_SW2
NC
SAW_SW1
BSW2
BSW1
VSYNC
HSYNC
AVDD1
PXFM
JTRET0
GND
AGND
TELETEXT
WSS
JTMS
AVDD2
CVBS0
TXCF
JTCK
MCFM
TEST0
AVDD3
WSCR
WSCF
JTDO
VDD
SCL
SDA
FB
R
G
B
NC
NC
S1(N)
S0(N)
S0
S1
S_SW
DESIGN
ON/OFF
NC
MUTE
NC
REST
IR IN
49
56
55
1
54
2
52
3
534
51
5
50
6
48
7
47
8
46
9
45
10
44
11
43
12
42
13
41
15
40
14
39
16
38
17
37
18
36
19
35
20
34
21
33
22
32
23
31
24
30
25
29
26
28
27
IC101
ST92195
C205
1uF 50V
C207
0.022uF
C206
1uF 50V
C260
1n
C261
1n C262
1n
R251 100
R252 100
R254 2K2
R253 15K
R209
10K
C248
0.1uF
C254 4n7/M
C228
1uF 50V
C229
10uF 16V
C249
100uF 16V
C255
2.2uF 50V
C257
470uF 16V
C256
0.1uF
C205
1uF 50V
C207
0.022uF
C206
1uF 50V
D251 1N4148
R258 56K
R259 2K2
R255 8K2
D255
5V1
R257
1K
D252
1N4148
R256
10K
+5V
D254
1N4148
R275
10K
C259
4.7uF 50V
SDA
SCL
+8V
AUDIO O UT
BCL
HS
FLYB
HD
VD
CVBS. TXT
VS
L252
1uH
L202
10uH
R276
1K5
C260
1n
C261
1n
C262
1n
C253
1n
C245
1n
R251 100
R252 100
R254 2K2
R253 15K
R209
10K
C248
0.1uF
C254 4n7/M
C228
1uF 50V
C229
10uF 16V
C249
100uF 16V
C255
2.2uF 50V
C257
470uF 16V
C256
0.1uF
+5V
C205
1uF 50V
C210
10uF 16V
C207
0.022uF
C206
1uF 50V
C213 0.1uF
C212
47uF 1 6V
L208
C219
470uF 16V
C217
0.1uF
C221
1uF 50V
R224
330K
C224
1uF 50V
C220
1uF 50V
R230
75
C218
1uF 50V
R217
1K5
R218
1K5
Q203
2SC1815Y
+8V
R219
470
D251 1N4148
R258 56K
R259 2K2
R255 8K2
D255
5V1
R257
1K
D252
1N4148
R256
10K
+5V
D254
1N4148
R275
10K
C259
4.7uF 50V
SDA
SCL
C235
1uF 50V
R231
75
R213
120
L207
6.8UH
Z201
5.5MHz
Z202
6.5MHz
+8V
VIDEO I N 1
AUDIO O UT
BCL
HS
FLYB
HD
VD
CVBS.TXT
VS
AUDIO IN
L252
1uH
L202
10uH
C214
22uF 16V
VIDEO IN 2
C222
10uF 16V
R220
75
VIDEO OUT
L209
1uH
+8V
R276
1K5
L201
10uH
C260
1n
C261
1n
C262
1n
C237
1n
C253
1n
C245
1n
R265 1K
R266 1K
R264 1K
R270
56
R271
56
R272
56
R273
1K
R274 47K
C264
0.1uF
C265
0.1uF
C266
0.1uF
R262 1K
R261 1K
R263 1K
FB
R
G
B
R269
7K5
C295
1n
R411
220
R211
100K
C296
1n
R404
1K
C293
1n
C293
1n
R402
470
C290
1n
R403
1K
C292
1n R401
470
NOTE: 1, IS MARK OF CRITICAL COMPONENT; 2, SUBJECT TO CHANGE WITHOUT NOTICE.
1
2
3
4
5
6
7
8
9111315
16
17
18
19
20
21
14 12 10
AR/O
AR/I
AL/O
AL/I
B/I
STATUS
G/IR/I
FB/IV/O
V/I
XS200
SCART
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