![background image](http://html.mh-extra.com/html/sharp/lc-20dv20u/lc-20dv20u_service-manual_373836053.webp)
A
B
C
D
E
F
G
H
A
B
C
D
E
F
G
H
2
1
3
4
5
6
7
8
2
1
3
4
5
6
7
8
L4401
220uH 0305
L4203
47uH
0305
L4206
47uH
0305
L4207
47uH
0305
L4202
47uH
0305
W870
W905
W906
W802
W803
W928
W863
W866
W904
W929
C4408
10
16V
V-S
C4407
10
16V
V-S
C4242
100
25V
YK
C4252
100
16V
V-S
C4246
22
16V
KA
C4401
10
16V
V-S
C4404
10
16V
V-S
C4402
10
16V
V-S
C4260
100
16V
V-S
C4261
100
16V
V-S
C4232
10
25V
KA
C4406
47
16V
V-S
C4403
10
16V
V-S
C4456
47P CH
C4206
470P CH
C4263
0.01 B
C4219
0.01 B
C4209
0.01 B
C4262
0.01 B
C4259
0.01 B
C4251
1 B
C4250
1 B
C4416
47P CH
C4267
1
B
C4220
1 B
C4228
470P CH
C4233
1 B
C4203
0.01 B
C4205
470P CH
C4227
1 B
C4217
47P CH
C4208
47P CH
C4225
1 B
C4218
1 B
C4221
1 B
C4207
470P CH
C4224
1 B
C4222
1 B
C4223
47P CH
C4264
47P
CH
C4265
47P
CH
C4243
0.01 B
C4247
0.01 B
C4240
1
B
C4413
0.1
B
C4414
470P
CH
C4214_1
47P CH
C4229_1
47P CH
C4215
1 B
C4216
1 B
C4415
47P CH
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL.
WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST
NOTE:THE DC VOLTAGE AT EACH PART WAS MEASURED
R4411
1M
R4412
1M
R4419
1K
R4404
1K
R4405
1K
R4213
680
R4214
390
R4210
10K
R4211
10K
R4212
3.9K 1/4W
R4209
3.9K 1/4W
R4222
1K
R4223
1K
R4409
1K
R4410
1K
R4220
100
R4234
100
R4233
100
R4231
5.6K
R4230
5.6K
R4228
390
R4407
1M
R4408
1M
R4403
1M
R4406
1M
R4219
100
R4401
220 1/4W
R4402
330 1/4W
Q4203
KTC3875S_Y_RTK
BUFFER
Q4206
KTC3875S_Y_RTK
BUFFER
Q4205
KTC3875S_Y_RTK
BUFFER
D4203
UDZS8.2B
D4202
UDZS8.2B
D4208
UDZS8.2B
D4210
UDZS8.2B
IC4201
AN15853B-E1
AV SW IC
1
1
01
11
21
31
41
51
61
71
8
19
2
20
21
22
23
24
25
26
27
28
29
3
30
31
32
33
34
35
36
456789
B4203
W5RH3.5X5X1.0
S
D
G
Q4210
KTK5132E
LEVEL SHIFT
S
D
G
Q4208
KTK5132E
LEVEL SHIFT
CP4203
00_6232_029_
1
10
11
12
13
14
15
16
17
18
19
2
20
21
22
23
24
25
26
27
28
29
3
4
5
6
7
8
9
Q4233
KRC102SRTK
SW
D4209
1SS133
CP4202
A2001WV2-5P
1
2
3
4
5
CD4203
2H0T1401
TR702
W5T29X7.5X19
TR3001
W5T29X7.5X19
Q4409
KTA1504S_Y_RTK
BUFFER
Q4410
KTA1504S_Y_RTK
BUFFER
Q4401
KTA1504S_Y_RTK
BUFFER
Q4231
KRA103SRTK
SW
CAUTION: DIGITAL TRANSISTOR
IC4401
NJM2584AM(TE1)
COMPONENT1/2 YUV SW IC
1
10
11
12
13
14
15
16
2
3
4
5
6
7
8
9
CAUTION: DIGITAL TRANSISTOR
AT+3.3V
AT+5V
P.CON+9V
SIDE/DVD_Y
DVD_Y
GND
P.CON+5V
YUV1/YUV2_Y
DTUNER_PR
SIDE/DVD_C
DVD_C
DTUNER_Y
DTUNER_PB
DTUNER_PR
YUV1/YUV2_PR
DTUNER_PB
DTUNER_H
YUV1/YUV2_Y
YUV1/YUV2_PB
SW_YUV_PR
YUV1/YUV2_PB
YUV1/YUV2_PR
SW_YUV_PB
YUV1_A_IN_L
SW_YUV_Y
YUV1_A_IN_R
S_SW_1
DTUNER_Y
S_SW_2
DTUNER_RESET
S1_Y_IN
DTUNER_TX
S1_C_IN
AUDIO_MUTE_L
S2_Y_IN
DTUNER_POWER
S2_C_IN
DTUNER_SD_H
AV1_IN
DTUNER_RX
AV2_IN
TUNER_VIDEO
AV1_A_IN_L
S2_C_IN
AV1_A_IN_R
S2_Y_IN
S_SW_2
SCL
SDA
SW_AUDIO_R[JACK]
SW_AUDIO_L[JACK]
STEREO_RESET
SW_AUDIO_L[PC]
REMOCON_IN
SW_AUDIO_R[PC]
STANDBY_LED
DTUNER_H
DVD_Y
DVD_C
TUNER_VIDEO
S_SW_1
DTUNER_H
SIDE/DVD_C
SDA
AUDIO_MUTE_L
YUV1_A_IN_R
SCL
DTUNER_RX
SIDE/DVD_Y
DTUNER_TX
DTUNER_RESET
YUV1_A_IN_L
AV2_IN
SW_AUDIO_R[PC]
SW_AUDIO_L[PC]
S1_C_IN
STEREO_RESET
AV1_A_IN_R
S1_Y_IN
DTUNER_POWER
AV1_A_IN_L
DTUNER_SD_H
AV1_IN
STANDBY_LED
REMOCON_IN
GND
H-2
H-1
PCBD20
CMF090
AV SWITCH2 SCHEMATIC DIAGRAM
(AV PCB)
NC
2.6
0
1.0
2.3
0
2.3
0
2.9
NC
2.7
0
3.0
3.1
5.0
3.0
0
3.0
9
8
10
NC
NC
5.0
0
0
2.5
1.8
0
2.5
0
1.8
2.0
1.3
0
8.9
1.8
2.4
D_L1_Vin
Vcc
BIAS
GND
SCL
SDA
6dB
6dB
Vref
+
6dB
D_SW_1
NC
4.7
4.5
4.7
4.5
0
5.4
7.5
4.7
7.5
5.4
0
0
5.4
7.5
5.4
0
5.4
7.5
4.5
4.7
4.6
4.7
0
3.5
3.5
0
4.7
7.5
5.7
4.5
5.7
4.5
4.5
9.0
5.3
5.0
SW_CVBS
SW_Y
SW_C
SW_A_L
TUNER_V
SIDE_A_IN_L
SIDE_A_IN_R
SIDE_V_IN
SIDE_C_IN
SIDE_Y_IN
5.0
3.3
3.3
3.3
5.0
3.3
8.9
1.5
2.1
8.9
1.5
2.1
YUV1_A_IN_R
YUV1_A_IN_L
S1_Y_IN
S1_C_IN
AV1_A_IN_R
AV1_A_IN_L
YUV2_A_IN_L
YUV2_A_IN_R
SW_A_R
AV1_IN
AV2_IN
S2_Y_IN
S2_C_IN
IN3A
OUT1
IN1B
NC
GND2
OUT2
OUT3
NC
IN3B
GND3
IN2A
CTL
V+
IN2B
GND1
IN1A
S_SW_1
S_SW_2
FROM/TO POWER
GND
AT+5V
REMOCON IN
STANDBY LED
P.ON LED
FROM/TO TUNER
SWITCH_VIDEO_C
GND
SWITCH_VIDEO_Y
GND
SWITCH_CVBS
GND
SDA1
SCART_AUDIO_SW
STEREO_RESET
SW_AUDIO_L(PC)
GND
GND
GND
SCL1
GND
SW_AUDIO_R(PC)
GND
GND
DTV_MUTE_L
DVD/AV3_SW
DTUNER_RX
DTUNER_TX
DTUNER_RESET_L
DTUNER_POWER
DTUNER_SD_H
DTUNER_H
FROM/TO TUNER
5.0
5.0
0
NC
NC
NC
FROM/TO STEREO
FROM/TO OPERATION/REMOCON
/FILTER/AC INLET
(CP2201)
(CP803)
FROM/TO TUNER/OUT JACK
FROM/TO SCALER
FROM/TO TUNER/OUT JACK
FROM/TO AV JACK