AOC envision L37W431 Service Manual page 46

37'' LCD TV
R405 100
2 Detect_VGAVS
R406
2 VGAVS
R407
2 VGAHS
R408 100
7 RX_INT#
R409 NC
2,3 BL_ADJ
100
R410
10 PWR_ON
R413
NC
5V-1_CPU
RST
R421 100
2 Detect_VGAHS
R422 100
7 SCDT
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
R4028 4.7K
R433 4.7K
R435 4.7K
R4029 4.7K
R4030 4.7K
R439 4.7K
R441 100 1/16W
2 KEY _AD
R443 100
7 CE_REMOTE
R444 4.7K
5V-1_CPU
E_PAGE
5V-1_CPU
100
R460
2 ISP_SW
NC
R463
100
R464
1 CLOCK_SW
NC
R466
4 OD_SEL
R467 NC
4 LCS
R473 220 1/16W
ZD400 100uF/16V
C413
R478 8.2K
1 2
3.6V
MLL5227B
R484 1K 1/16W
0.001uF
C400
C414
10uF/16V
CN404 CONN
1
2
CPU_RST
3
Reset MCU
C416
10uF/16V
A[0..7]
5V-1_CPU
TP400 TP401 TP402 TP403 TP404 TP405 TP406 TP407
A0 A1 A2 A3 A4 A5 A6 A7
NC
NC
5V-1_CPU
76
P1_2
77
P1_1
78
P1_0
79
P0_7/AN0_7
80
P0_6/AN0_6
81
P0_5/AN0_5
82
P0_4/AN0_4
83
P0_3/AN0_3
84
P0_2/AN0_2
85
P0_1/AN0_1
86
P0_0/AN0_0
87 M30620SPGP
P10_7/AN7
88
P10_6/AN6
89
P10_5/AN5
90 U402
P10_4/AN4
91
P10_3/AN3
92
P10_2/AN2
93
P10_1/AN1
94
Av ss
95
P10_0/AN0
96
Vref
97
Av cc
98
P9_7/ADTRG
99
P9_6
100
P9_5
X400
10.000MHZ
5V-1_CPU
C411 C412
15pF 15pF
5V-1_CPU
+
Q402
PMBS3906
5V-1_CPU
CPU_RST
CPU_RST
VD3_3 VD3_3
R489
NC 1
GND
3
VCC
2
RST_H
RESET
C415
U404
NC
ASM810SEUR-T NC
MCU_A[0..7] 3
A[8..14] 3
A8
A9
A0 RN401 4 5 33
A10 A1 3 6
A2 2 7
A11 A3 1 8
A4 RN403 4 5 33
A12 A5 3 6
A6 2 7
A13 A7 1 8
A8 RN405 4 5 33
A14 A9 3 6
A10 2 7
A15 A11 1 8
A12 RN400 1 8 33
A16 A13 2 7
A14 3 6
A17 A15 4 5
A16 R414 33
A17 R415 33
A18
R416
NC
W27E040 USED
A[8..18]
50 A18
P4_2/A18
49
P4_3/A19
48 R423 0 1/16W
P4_4/CS0
47 R424 22 1/16W
P4_5/CS1
TP408
46 R425 22 1/16W
P4_6/CS2
45 R427 4.7K 1/16W
P4_7/CS3
44
P5_0/WR
43
P5_1/BHE RD
42
P5_2/RD
R429 22 1/16W
41
P5_3/BCLK
40
P5_4/HLDA
39
P5_5/HOLD
ALE
38 R434 22 1/16W
P5_6/ALE
37 R436 4.7K 1/16W
P5_7/RDY
36 RST_HDMI
P6_0/CTS0/RTS0
35 RST_EX52
P6_1/CLK0
34
P6_2/SCL0
33
P6_3/SDA0
32
P6_4/CTS1/RTS1
31
P6_5/CLK1
30 R445 RX
100
P6_6/RXD1
29 R447 100 TX
P6_7/TXD1
28 SDAE
P7_0/SDA2 RX
27 SCLE
P7_1/SCL2 2
R448
26 4.7K R449
INV_PRO 2
P7_2/TA1out
4.7K
R450 4.7K
5V-1_CPU
NC
R459
R461
NC
R462 100
PANPWR_ON 10
C409
100pF
R470 100 1/16W
MUTE 9
R471 100 1/16W
REMOTE 2
R472 100 1/16W
INT# 3
R475 100 1/16W
INT_A 8
5V-1_CPU
5V_SB
R487 R488
4.7K 1/16W 4.7K 1/16W
Top View
1
SC1
SC1 2,3,9
3
SD1
2
SD1 2,3,9
2
RST_HDMI
1
3
CN400
CONN
46
When use W27E040,use R416 and
R411 ; R419 is Option.
Socket = 87L 202-32
When use W29C040,use R419 ;
W27E040
R416 and R411 are Option.
U401 A29040BL-70F
12 13 RN402 1 8 33 AD0
A0 Q0
11 14 2 7 AD1
A1 Q1
10 15 3 6 AD2
A2 Q2
9 17 4 5 AD3
A3 Q3
8 18 1 8 AD4
A4 Q4
7 19 2 7 AD5
A5 Q5
6 20 3 6 AD6
A6 Q6
5 21 4 5 AD7
A7 Q7
27 RN404 33
A8
26 22 PS
A9 CE#
23 24
A10 OE#
25
A11
5V-1_CPU
4 32
A12 VCC
28 1 R411 NC
A13 VPP
29
A14 W27E040 USED
3
A15
2 C403
C402 +
A16
10uF/16V
30 0.01uF
A17
31 16
A18 GND
33
R419
R420 33
WR# 3
CS1 3
TP409
CS 3
WR
R426 22 1/16W
5V-1_CPU
R428
WR_EMU 3
VD3_3
22 1/16W
TP410
R430
10K
R431 100
R432 47K
TP411 5V-1_CPU
ALE_EMU 3 Q401
1
NC
5V-1_CPU
R438
R437
4.7K
4.7K
R440 100 1/16W
R442
100 1/16W
C405
C406
5V-1_CPU
100pF 100pF
1
R446 0
2
3
2
4
TX
5
6
7
CPU_RST 8
9
10 CN403
CONN
2.54mm
Option
R465
NC
C410
3.3V_SB
1
A0 VCC
2
R482 A1 PAGE
4.7K
3
A2 SCL
RST_7117 4
RST_7117 8 GND SDA
RST 1 Q403
PMBS3904
U400 24C64
R486 4.7K
U403 24LC64
4
GND
3
NC2
3.3V_SB 2
5V-1_CPU NC1
1
NC0
R490
4.7K
R491
4.7K RST#
Q404
AOC (Top Victory) Electronics Co., Ltd.
PMBS3904
1
Title
2K
R492
Size
Custom
Date:
Envision L37W431
AD[0..7] 3
CN401 1
CONN 2 R401 0
RST# 7
Reset SIL9011..
C401 10uF/16V
3.3V_SB
CONN
CN402
1
R400 0
2
RST_H 3
Reset EX52
C404
10uF/16V
RD# 3
RD_EMU 3
1/16W
RST_H 3
SC1 2,3,9
SD1 2,3,9
5V_SB 5V-1_CPU
600 OHM
L401
C408
C407 +
100uF/16V
0.1uF
5V-1_CPU
0.01uF
8
7 E_PAGE
6 SCLE
R483 100 1/16W
5 SDAE
R485
100 1/16W
8
VCC
7
VCLK
6
SCL
5
SDA
MCU
Document Number Rev
B
715T1814-1
Thursday , September 14, 2006 Sheet 6 of 11