Schematic Diagram; Main Board - TCL LCD20W5HE Service Manual

20" LCD TV

10. Schematic Diagram

10.1 Main Board

715T1539-1-2
3.3V_SB
R229 R230
NC NC
RxD 11
11
FB23
1 2 VGA_SDA_IN 12
12
150 OHM VGA_HS 13
13
VGA_VS 14
14
FB26
1 2 VGA_SCL_IN 15
15
150 OHM
DB15
R239 R240
22 1/16W 22 1/16W
U101
R241 VGAHS 1
7 VGAHS
1A
3
2A
33 1/16W VGAVS 5
7 VGAVS
3A
9
4A
C804 C805 FB 11
5A
13
6A
100pF 47pF 14
VCC
C221
0.1uF
R252 10K 1/16W
U102
R253 10K 1/16W 8
VCC
VGA_SDA 5
SDA
VGA_SCL 6
SCL
4
GND
24LC21A
I2C Address: 1010 000x
8-pin, 300mil DIP with socket
3.3V_SB
C105
0.1uF R106
SCART1_FB 1K 1/16W
D108 Q105
R105 1 PMBS3904
BAT54S 100 1/16W
0.1uF
5V
D105
C800
2
VGAVS 3 R847
1
0.047uF
1M 1/16W
BAT54S
D106
C801
2
VGAHS 3
1 R848
0.047uF
BAT54S
100K 1/16W
CN108
6
6
1 R111 0 1/16W
1
7
7
2 R110 0 1/16W
2
8
8
3 R109 0 1/16W
3
9
9
4 TxD
4
10 R547 R548 R549
10
5 D101 D102 D103
5
MLL4148 MLL4148 MLL4148
75 1/16W 75 1/16W 75 1/16W
2 R242 NC
1Y
4 R243 22 1/16W
VGA_HSIN 4
2Y
6 R244 NC
3Y
8 R245 22 1/16W
VGA_VSIN 4
4Y
10
SC1_FB 4
5Y
12
6Y DET_FB 7
R104 100K 1/16W
7
GND
C104
74LVC14 0.1uF
5V_SB
3.3V_SB
D104
2
3
1
BAT54C
7 VGA_HS VGA_VS
VCLK
3 C225
NC2
2
NC1
1 0.1uF
NC0
ZD101 ZD102
MLL752A MLL752A
22K
10uF/16V
C816
FB
5V_SB
Detect_VGAVS 7
C106
D To mcu
18K
R846
33K 1/16W Q102
G 2N7002
5V_SB S
Q101
PMBS3906
Detect_VGAHS 7
R849
C802 33K 1/16W
Q107
11 Audio_L+
0.47uF/50V 2N7002
11 Audio_L-
Q106
11 Audio_R+
PMBS3906
11 Audio_R-
C803
0.47uF/50V
U103 74HC4052D
TxD 13 12
TX 7
X X0
14
SC1 7,8
X1
RxD 3 15
Y X2
11
X3
1
RX 7
Y 0
5
SD1 7,8
Y 1
2
Y 2
4
VGA_RIN 4
Y 3
10 SVIDEO_Y
VGA_GIN 4 ISP_SW 7
A
9
B
SVIDEO_C
VGA_BIN 4
6
EN
5V_SB SCART2_CVBS
7
VEE
16 SCART2_C
VDD
+
C102
10uF/16V
CN106
2 1
5V
REMOTE 4 3
6 5
12V_T
8 7
10 9
7, 10 SC1_FN
12 11
7, 10 SC2_FN
14 13
16 15
7,8 SC1
18 17
7,8 SD1
20 19
22 21
4 COMP_Y
24 23
4 COMP_PB
26 25
4 COMP_PR
28 27
30 29
4,10 SCART1_G
32 31 SVIDEO_Y
4,10 SCART1_B
34 33 SVIDEO_C
4,10 SCART1_R
36 35
10 SCART1_FB
CONN
5V
5V
R880
1/16W R881
22K 1/16W
Q103
10uF/16V
1 PMBS3904
C817
1
L110
R882
75 1/16W 120 OHM
R884
R885
1/16W
R886
470 1/16W
18K 1/16W
EMI
L101 150 OHM
L102 150 OHM
L104 150 OHM
L105 150 OHM
38
5V
R850
NC
R851
RN11 NC
U104
30K 1/16W
2
S1A VCC
5
S1B
11
S1C
14
S1D
C826 10uF/16V 3
S2A
6
S2B
C827 2.2uF/16V 10
S2C
13
S2D GND
C828 10uF/16V
C829 2.2uF/16V RN12 PI5V330Q
10K 1/16W
+12VP
PC_R_I 11
+5VP
PC_L_I 11
R103 NC
R_OUT 11 5V
L_OUT 11
7 INV_PRO
TUNER_OUT
3,7 BL_ADJ
SCART1_CVBS 10
SCART2_CVBS 4,10
SCART2_C 4,10
AV_1 10
CVBS_SEL 4
11 EAR_L
11 EAR_R
7 W_ENABLE
12V
Q104
PMBS3904
5V
L111
R883
75 1/16W 120 OHM 8
7 REMOTE
7
R112 5V_SB 6
R887
3.3V_SB NC 5
470 1/16W
7 KEY _AD
120 OHM(8P4R)
R107
3.3V_SB
NC
C134
R113
C133 470pF 5V_SB
470pF 3 CN102
2.2K 1/16W
2
1 R114
CONN 0 1/16W
AOC (Top Victory) Electronics Co., Ltd.
2 CN104
1
CONN
Title
C136
C135 470pF
470pF
Size Document Number
B
Date: Tuesday , June 13, 2006
TCL LCD20W5HE
0 1/16W
LOW:INPUT1
0 1/16W 5V HIGH:INPUT2
16
1
SVIDEO_SW 7
IN
4 Y _IN1
DA Y _IN1 4
7 C_IN1
C_IN1 4
DB
9
DC
12
DD
C819
15 C818 +
EN
8
47uF/16V 0.1uF
C107 C108
CN101
0.1uF 0.1uF
1
2
3
4
5
6
7
L107 150 OHM 8
9
L108 150 OHM 10
C131
0.001uF C132 CONN
0.001uF
R102
NC
C110 C111 CN105
22pF
22pF
LP107 6
5 4 5
6 3 4
7 2 3
8 1 2
1
120 OHM(8P4R)
CONN
C138
0.001uF
CN107
L109 150 OHM 1
LP108 2
1 3
2 4
3 5
4 6
7
8
CONN
I/O
Rev
1
715T1539-1-2
Sheet 2 of 14