![background image](http://html1.mh-extra.com/html/viewsonic/vg921m-2/vg921m-2_service-manual_1021243046.webp)
43
ViewSonic Corporation
Confidential - Do Not Copy
VG921m-2
Model
Title
Date
Rev:
ViewSonic Corporation
WP
WP
LEDB
LEDG
B_D0
F_D12
B_D9
OSP
F_D0
F_D11
B_D16
F_D19
B_D14
F_D15
ESP
VCTRL
F_D10
B_D1
F_D5
B_D0
F_D2
F_D14
F_D10
SCL
B_D1
F_D2
F_D6
B_D14
F_D18
B_D11
F_D3
B_D12
B_D13
B_D15
B_D7
B_D4
F_D1
B_D18
F_D8
F_D0
B_D18
F_D3
B_D10
B_D17
B_D3
F_D13
B_D17
B_D10
F_D4
B_D8
B_D2
F_D5
LEDG
F_D16
F_D17
F_D11
F_D17
B_D12
B_D11
F_D15
F_D1
F_D7
B_D5
F_D6
B_D16
F_D19
SDA
B_D6
F_D4
F_D9
F_D16
F_D13
B_D5
F_D8
B_D19
B_D6
B_D4
VCTRL
B_D3
B_D19
F_D18
B_D8
B_D13
B_D9
F_D7
B_D2
F_D12
B_D7
F_D9
LEDB
B_D15
F_D14
C3
0.1uF/16V
R533
NC
+
C157
10uF/16V
R
217
4.
7K
Ω
1/
16W
R35
100
Ω
1/16W
RIN0P
59
GIN0P
56
SOGIN0
57
BIN0P
54
RIN0N
58
GIN0N
55
BIN0N
53
HSYNC0
63
VSYNC0
64
REXT
51
REFP
62
REFM
61
SDO
70
SCK
72
SCZ
71
SDI
73
GPIO_P27/PWM1
79
PWM1/GPIO_P25
21
NC/LVACKM/NC
108
XIN
32
XOUT
33
RA1P/LVA2P/RA2
109
RA1N/LVA2M/RA3
110
RA2P/LVA1P/RA4
111
RA2N/LVA1M/RA5
112
RA3P/LVA0P/RA6
113
RA3N/LVA0M/RA7
114
CLKAP/LVB3P/LHSYNC
118
CLKAN/LVB3M/LVSYNC
119
CLKBP/LVBCKP/LCK_ODD
120
CLKBN/LVBCKM/LDE
121
NC/LVB2P/NC
122
NC/LVB2M/NC
123
BB1P/LVB1P/BB2
124
BB1N/LVB1M/BB3
125
BB2P/LVB0P/BB4
126
BB2N/LVB0M/BB5
127
NC/LVACKP/NC
107
GA3N/LVA3M/GA7
106
GA3P/LVA3P/GA6
105
GND
41
GND
47
RX2P
39
RX2N
40
RX1P
42
RX1N
43
AVDD_DVI
44
RX0P
45
RX0N
46
RXCKP
48
RXCKN
49
GND
38
GND
96
GND
116
VDDP
67
VDDC
12
MODE[1]
104
MODE[0]
102
VCTRL
11
VDDP
14
VDD_OT
P
68
DDCA_SDA
65
DDCA_SCL
66
DDCD_SDA
36
DDCD_SCL
37
PWM0/GPIO_P26
29
AVDD_DVI
50
VDDC
97
GPIO_P15
69
PWM2/GPIO_P24
78
GPIO_P16
20
GPIO_P17/SAR0
22
GPIO_P00/SAR1
23
GPIO_P01/SAR2
24
GPIO_P06
27
GPIO_P07
28
GPIO_P13
30
GPIO_P14
31
GPIO_P16
35
DDCROM_SDA
76
DDCROM_SCL
77
RST
19
GA2P/NC/GA4
100
GA2N/NC/GA5
101
GA1P/NC/GA2
98
GA1N/NC/GA3
99
BA3P/NC/BA6
93
BA3N/NC/BA7
94
BA2P/NC/BA4
91
BA2N/NC/BA5
92
BA1P/NC/BA2
89
BA1N/NC/BA3
90
RB1P/NC/RB2
9
RB1N/NC/RB3
10
RB2P/NC/RB4
15
RB2N/NC/RB5
16
RB3P/NC/RB6
17
RB3N/NC/RB7
18
GB1P/NC/GB2
2
GB1N/NC/GB3
3
GB2P/NC/GB4
5
GB2N/NC/GB5
6
GB3P/NC/GB6
7
GB3N/NC/GB7
8
BB3P/NC/BB6
128
BB3N/NC/BB7
1
ESP
80
OSP
81
GPO0
88
GPO1
87
GPO2
86
GPO3
85
GPO4
84
GPO5
83
GPO6
82
GPIO_P02/SAR3
25
GPIO_P03
26
GPIO_P22
75
GPIO_P23
74
AVDD_PL
L
52
AVDD_MPL
L
34
AVDD_MPL
L
4
VDDP
95
VDDP
103
VDDP
115
VDDC
117
AVDD_ADC
60
GND
13
U401
TSUM57AK
1
H3
R
194
10K
Ω
1/
16W
Q12
PMBS3906
R192
NC
R535
220K
Ω
1/16W
1
H12
TP84
C22
0.1uF/16V
TP74
D26
LL4148WP
R25
15K
Ω
1/16W
R530
2K
Ω
1/16W
C
B
E
Q15
CHT2907
R193
NC
R3
6
N
C
FB408
600 OHM
C4
0.1uF/16V
R2
22
Ω
1/16W
C151
0.1uF/16V
R
176
39K
Ω
1/
16W
R37
100
Ω
1/16W
TP80
C153
0.1uF/16V
R42
100
Ω
1/16W
C27
0.1uF
C155
0.1uF/16V
R
189
47
Ω
1/
16W
C156
0.1uF/16V
C24
0.1uF/16V
1
H4
1
H13
+
C21
10uF/16V
C5
0.1uF/16V
R182
4.7K
Ω
1/16W
R531
100
Ω
1/16W
TP78
FB407
600 OHM
C20
0.047uF
C229
0.1uF
R1
1
4.7
K
Ω
1/
16W
C19
0.1uF/16V
C158
0.1uF/16V
R
175
39K
Ω
1/
16W
C6
0.1uF/16V
L2
80ohm
TP81
L3
80ohm
TP85
Y1
14.318MHZ
1
H11
R
199
1K
Ω
1/
16W
R
27
10K
Ω
1/
16W
1
H5
D20
NC/UDZS5.6B
C12
0.047uF
R2
4
4.7
K
Ω
1/
16W
C7
0.1uF/16V
C160
0.1uF/16V
TP86
FB406
600 OHM
R31
100
Ω
1/16W
R532
NC
R198
47
Ω
1/16W
C152
0.1uF/16V
C13
0.047uF
R16
22
Ω
1/16W
TP79
C154
0.1uF/16V
C8
0.1uF/16V
R
5
4.
7K
Ω
1/
16W
R187
22K
Ω
1/16W
R
173
10K
Ω
1/
16W
A0
1
A1
2
A2
3
GND
4
SDA
5
SCL
6
WP
7
VCC
8
U1
AT24C16N-10SC-2.7
D21
NC/UDZS5.6B
CE#
1
SDO
2
WP#
3
VSS
4
SDI
5
SCK
6
HOLD#
7
VDD
8
U402
SST25VH010
R43
100
Ω
1/16W
R1
22
Ω
1/16W
1
H6
R
4
4.
7K
Ω
1/
16W
TP9
6
R17
22
Ω
1/16W
FB6
600 OHM
C14
0.047uF
R28
390 1%
R
23
10K
Ω
1/
16W
L1
80ohm
Q14
PMBS3904
C9
0.1uF/16V
FB1
600 OHM
R
177
4.
7K
Ω
1/
16W
R22
22
Ω
1/16W
1
H7
R44
100
Ω
1/16W
R
190
10K
Ω
1/
16W
R7
100
Ω
1/16W
R
33
10K
Ω
1/
16W
C15
0.047uF
R18
22
Ω
1/16W
R
3
4.
7K
Ω
1/
16W
Q11
PMBS3904
R3
0
4.7
K
Ω
1/
16W
R
188
10K
Ω
1/
16W
R29
NC/ 1M
Ω
1/16W
C10
0.1uF/16V
1
H8
R1
9
10K
Ω
1/
16W
D25
LL4148WP
R534
NC
R536
4.7K
Ω
1/16W
C28
22pF
R8
100
Ω
1/16W
R529
51
Ω
1/16W
C16
0.047uF
R21
22
Ω
1/16W
R
15
10K
Ω
1/
16W
R3
2
4.7
K
Ω
1/
16W
1
H2
FB2
600 OHM
+
C163
4.7uF/35V
1
H1
TP73
R
195
47
Ω
1/
16W
+
C23
10uF/16V
R191
47
Ω
1/16W
C29
22pF
R1
2
4.7
K
Ω
1/
16W
TP76
C17
0.047uF
Q13
PMBS3906
R2
0
NC
TP77
R3
4
N
C
3.3V
1.8V
5V
3.3V
GND
GND
3.3V
AVDD
VDDC
GND
3.3V
GND
VMPLL
GND
GND
GND
VDVI
VMPLL
3.3V
3.3V
VPLL
5V
AVDD
GND
3.3V
GND
GND
3.3V
VDDP
GND
GND
3.3V
5V
VDVI
GND
3.3V
VDDP
GND
1.8V
VPLL
VDDC
5V
AVDD
GND
GND
GND
GND
GNDGND
5V
5V
GND
5V
3.3V
DDC_WP
OE
B_D[0..19]
R_IN+
BL_BRIGHT
SW5_MENU
STV1
DDC_SDA
F_D[0..19]
G_IN+
LP
HSI
R_IN-
PWR_LEDG
B_IN+
B_IN-
STH_B
STH_F
POL
AMP_MUTE
AMP_STBY
DDC_SCL
BL_EN
PWR_LEDB
VOLUME
PWR_EN
VSI
DVI_R+
G_IN-
SOGI
DVI_R-
DVI_G-
DVI_G+
DVI_B-
DVI_CLK-
DVI_B+
DVI_SCL
DVI_SDA
VGA_DET
DVI_DET
PWR
RSDS/LVDS/TTL
STHB,F SWAP 10/06
C1
8
NC
C1
1
NC
CPV
GND
GND
C2
5
N
C
GND
C2
6
N
C
GND
C4
2
N
C
GND
C43
NC
GND
C44
NC
GND
R1
0
N
C
R1
3
N
C
R1
4
N
C
GND
GND
GND
GND
R7
7
N
C
R7
6
N
C
R7
9
N
C
R7
8
N
C
R8
1
N
C
R8
0
N
C
Summary of Contents for VG921m-2
Page 50: ...47 ViewSonic Corporation Confidential Do Not Copy VG921m 2 9 PCB Layout Diagrams...
Page 51: ...48 ViewSonic Corporation Confidential Do Not Copy VG921m 2...
Page 52: ...49 ViewSonic Corporation Confidential Do Not Copy VG921m 2...
Page 53: ...50 ViewSonic Corporation Confidential Do Not Copy VG921m 2...
Page 54: ...51 ViewSonic Corporation Confidential Do Not Copy VG921m 2...
Page 55: ...52 ViewSonic Corporation Confidential Do Not Copy VG921m 2...
Page 56: ...53 ViewSonic Corporation Confidential Do Not Copy VG921m 2 SILKSCREEN TOP...
Page 57: ...54 ViewSonic Corporation Confidential Do Not Copy VG921m 2 TOP SIDE...