ViewSonic VA712b-2, Service Manual

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ViewSonic Corporation
11.3 Scaler
R409
30K 1/16W
R1
.8
DV
C
C
R1
.8
D
V
CC
Closed to Scaler
Voltage to 2.2V (if use
5V the R 25K and 20K;
3.3Vuse 15K and 30K )
W hen RTD2333, R403= NC/R404 =
0;
Otherwise, R403 = 0/R404 = NC
Closed to Crystal
C408
0.1uF
C409
0.1uF
XO
XI
DGND
C403
0.1uF
C405
0.1uF
C404
0.1uF
Q401
PMBS3906
R424 0 1/16W
R423 0 1/16W
R422 0 1/16W
R419 0 1/16W
R417 0 1/16W
R416 0 1/16W
R426 0 1/16W
R425 0 1/16W
ADC_GND
22
ADC_VDD
21
B0+
23
B0-
24
ADC_GND
37
SOG0
25
G0+
26
G0-
27
ADC_VDD
38
R0+
28
R0-
29
B1+ / V6
31
AHS1 / V0
39
AVS1 / VCLK
40
TMDS_TST / PWM0 / TCON2
5
TMDS_GND
10
TMDS_VDD
7
REXT
6
TMDS_VDD
13
RX2P
8
RX2N
9
TMDS_GND
16
RX1P
11
RX1N
12
RX0P
14
RX0N
15
RXCP
17
RXCN
18
XO
127
XI
128
DPLL_GND
126
DPLL_VDD
125
APLL_VDD
2
PLL_TEST1 / TCON0 / TCON3
3
PLL_TEST2 / TCON1 / TCON12
4
APLL_GND
1
VC
C
K
47
GN
D
K
46
PVC
C
59
PVC
C
72
PVC
C
83
PVC
C
95
PVC
C
10
8
PG
N
D
60
PG
N
D
71
PG
N
D
84
PG
N
D
96
PG
N
D
10
7
D
DCS
C
L
1
/
T
C
O
N
4
50
D
DCS
D
A
1
/
T
C
O
N
9
51
SC
L
K
/
T
C
O
N
3
57
S
D
IO
[3
] / T
C
O
N
0
55
S
D
IO
[2
] / T
C
O
N
1
1
54
S
D
IO
[1
] / T
C
O
N
7
53
S
D
IO
[0
] / T
C
O
N
1
3
52
P
W
M
1 / T
C
O
N
0
/
C
O
U
T
48
BJ
T
_
B
58
BB
3
P
/B
B
L
U
7
61
BB
3
N
/B
B
L
U
6
62
BB
2
P
/B
B
L
U
5
63
BB
2
N
/B
B
L
U
4
64
BB
1
P
/B
B
L
U
3
65
BB
1
N
/B
B
L
U
2
66
BC
L
K
P/
B
G
R
N
7
67
BC
L
K
N
/B
G
R
N
6
68
BG
3
P
/B
G
R
N
5
69
DDCSCL2 / VCLK / TCON4
121
DDCSDA2 / V7 / TCON6
120
BG2P / TXE3+
73
BG2N / TXE3-
74
BG1P / TXEC+
75
BG1N / TXEC-
76
BR3P / TXE2+
77
BR3N / TXE2-
78
BR2P / TXE1+
79
BR2N / TXE1-
80
BR1P / TXE0+
81
BR1N / TXE0-
82
AB3P / TXO3+
85
AB3N / TXO3-
86
AB2P / TXOC+
87
AB2N / TXOC-
88
AB1P / TXO2+
89
AB1N / TXO2-
90
ACLKP / TXO1+
91
ACLKN / TXO1-
92
AG3P / TXO0+
93
AG3N / TXO0-
94
AG2P
97
AG2N
98
AG1P
99
AG1N
100
AR3P
101
AR3N
102
AR2P
103
AR2N
104
AR1P
105
SDIO[2] / V3 / TCON5
114
SDIO[3] / V4 / TCON9
115
SCSB / V5 / TCON7
118
SCLK / V6 / TCON3
119
TCON9 / PWM0
122
RESET_OUT
123
33VRST_REF
124
SDIO[1] / V2 / TCON8
113
SDIO[0] / V1 / TCON10
112
AVS0
19
AHS0
20
B1- / V7
30
G1+ / V4
33
G1- / V5
32
R1+ / V1
36
R1- / V2
35
SOG1 / V3
34
S
C
SB /
T
C
O
N
1
2
56
P
W
M
2 / T
C
O
N
1
/T
C
O
N
7
49
AR1N
106
33VPNLOUT
109
TCON13 / COUT
110
V0 / TCON2/PWM1
111
VC
C
K
11
6
GN
D
K
11
7
BG
3
N
/B
G
R
N
4
70
RTD2523B ( RSDS & LVDS )
U401
Q402
PMBS3906
+
C406
22uF/16V
RXO3-
RXO3+
RXOC-
RXOC+
RXO1-
RXO2+
RXO2-
RXO1+
RXEC+
RXE3-
RXE3+
RXO0+
1.8DVCC
R1.8AVCC
RXE2-
RXE1+
RXE0+
RXE1-
RXE0-
RXEC-
RXE2+
DGND
DGND
MCU_RST
C414
0.1uF
33VRST_REF
+ C418
10uF/16V
R1.8DVCC
R402 0 1/16W
M512_XOUT
R413
NC R414
NC
C407
0.1uF
1.8DVCC
XI
XO
B1-
B1+
AHS1
DGND
AVS1
R1-
R1+
G1+
SOG1
G1-
D
DCS
CL
1
R1
.8
A
V
C
C
DG
N
D
DDCS
DA
1
BJ
T
_
B
DG
N
D
XO
1
XI
2
PLL_GND
3
AVS/VCLK
4
AHS/V0
5
B-/V1
6
B+/V2
7
G-/V3
8
G+/V4
9
SOG/V5
10
R-/V6
11
R+/V7
12
AD
C
_
G
N
D
13
AD
C
_
VD
D
14
PW
M
0
/S
D
IO
[3
]
15
P
W
M
1
/D
D
C
S
C
L
/S
C
S
B
16
P
W
M
2
/D
D
C
S
D
A
/S
C
L
K
17
B
JT
_
CT
RL
18
VC
C
K
19
PG
N
D
20
TX
E
3
+
21
TX
E
3
-
22
TX
E
C
+
23
TX
E
C
-
24
TXO2-
36
TXO2+
35
TXOC-
34
TXOC+
33
TXO3-
32
TXO3+
31
TXE0-
30
TXE0+
29
TXE1-
28
TXE1+
27
TXE2-
26
TXE2+
25
P
LL_V
D
D
48
33
V
R
ST
_
R
EF
47
R
ESE
T
_
O
U
T
46
SC
L
K
/P
W
M
0
45
S
C
S
B
/P
W
M
1
/DD
CS
C
L
44
S
D
IO
[3
]/P
W
M
2
/D
D
C
S
D
A
43
VC
C
K
42
PG
N
D
41
TX
O
0-
40
TX
O
0+
39
TX
O
1-
38
TX
O
1+
37
NC / RTD2023L
U403
R428 100 1/16W
+3.3V
R427 100 1/16W
DDCSDA1
DDCSCL1
R407
15K 1/16W
RXO0-
3
3VR
ST
_
R
EF
R3
.3
D
V
CC
RS
T
_
O
U
T
B1+
B1-
G1+
G1-
SOG1
R1-
R1+
AHS1
AVS1
B1+
SOG1
G1+
B1-
R1+
G1-
R1-
AHS1
AVS1
R420
NC
TMDS_VCC
+3.3V
+3.3V
C401
NC
C402
NC
R401
NC
2
X401
NC/24.576MHz
R408
4.7K 1/16W
FB403
600 OHM
R412 0 1/16W
TMDS_VCC
FB404
600 OHM
DEL R405,R406
FB405
600 OHM
DEL R418
FB401
600 OHM
FB402
600 OHM
R421
1K 1/16W
R431 0 1/16W
R434 0 1/16W
R433 0 1/16W
R432 0 1/16W
+3.3V
C415
0.1uF
C417
0.1uF
C416
0.1uF
+3.3V
RST_OUT
BJ
T
_
B
BJT_B
RXO3-
RXOC+
RXOC-
RXO3+
BRIGHTNESS
VOLUME
+3.3V
C421
0.1uF
C420
0.1uF
XI
XO
R430
NC
RTD_SCLK
RTD_SCSB
SDIO0
SDIO1
RTD_SD3/SDI
SDIO2
+3.3V
1.8DVCC
RXO1+
RXO2-
RXO2+
+3.3V
1.8DVCC
RXE3-
RXEC+
RXO0-
RXO1-
RXO0+
RXE2+
RXE2-
RXE3+
RXEC-
RXE0+
RXE1+
RXE1-
RXE0-
R404
NC R403
0 1/16W
C419
0.1uF
RX
O
3+
RX
O
3-
RX
O
C
+
RX
O
C
-
RXO2-
RXO1+
RXO2+
RXO1-
R3.3DVCC
RXO0-
RXE3-
RXE3+
RXO0+
1.8DVCC
1.8DVCC
RXE2-
RXEC+
RXE2+
RXEC-
R1.8DVCC
R
XE0
-
R
XE1
+
R
XE1
-
R
XE0
+
R411
4.7K 1/16W
R415
4.7K 1/16W
C411
0.1uF
DDC_SCL
DDC_SDA
2
1
3
Q403
NC/2SB1188
3.3V_Vd
+3.3V
RT
D_
S
D
3
/S
D
I
RT
D_
S
C
S
B
RT
D_
S
C
L
K
C412
0.1uF
C413
0.1uF
Title
Size Document Number Rev
Date: Sheet of
SCALER T1
715G1675-B
1 4 Thursday, July 28, 2005
DG
ND
R410
4.7K 1/16W
RX1P
RX2N
RX0N
RX1N
RX0P
RX2P
RXCN
RXCP
+ C410
10uF/16V