ViewSonic VA712b-1 Service Manual page 73

PANEL INTERFACE
V33B
L19 L19
MHC2012S420R MHC2012S420R
V33B
+ + C39 C39 C40 C40
1210/10u/16V/Y 1210/10u/16V/Y 0603/100n/25V/Y 0603/100n/25V/Y
L20 L20
MHC2012S420R MHC2012S420R
+ + C41 C41 C42 C42
1210/10u/16V/Y 1210/10u/16V/Y 0603/100n/25V/Y 0603/100n/25V/Y
L21 L21
MCB1608U121E MCB1608U121E
VGH
VGH
+ + C43 C43 C44 C44
1210/10u/25V/Y 1210/10u/25V/Y 0603/100n/25V/Y 0603/100n/25V/Y
L22 L22 MCB1608U121E MCB1608U121E
VGL PANEL_VGL
VGL
C45 C45 C46 C46
+ +
1210/10u/16V/Y 1210/10u/16V/Y 0603/100n/25V/Y 0603/100n/25V/Y
L23 L23
MHC2012S420R MHC2012S420R
VCM
VCM
1210/10u/16V/Y 1210/10u/16V/Y
C47 C47 C49 C49 C48 C48
+ + + +
1210/10u/16V/Y 1210/10u/16V/Y 0603/100n/25V/Y 0603/100n/25V/Y
L24 L24
MHC2012S420R MHC2012S420R
VAA
VAA
C50 C50 C51 C51 C52 C52
+ + + +
1210/10u/16V/5 1210/10u/16V/5
1210/10u/16V/5 1210/10u/16V/5
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VSD
OPEN OPEN
VGD
VGH_P
R177 R177
OPEN OPEN
R178 R178
R179 R179 OPEN OPEN
OPEN OPEN -5.6V
D10 D10
2
VRL
OPEN OPEN
D11 D11
R180 R180
OPEN OPEN OPEN OPEN
R181 R181
OPEN OPEN
VCOM
C148 C148 C149 C149
+ + + +
1210/10u/16V/Y 1210/10u/16V/Y 1210/10u/16V/Y 1210/10u/16V/Y
23V
VGH_P
VSA
R182 R182
R183 R183
OPEN OPEN
OPEN OPEN
0603/100n/25V/Y 0603/100n/25V/Y
11.02V
VRMS
D12 D12
C506 C506
R184 R184 OPEN OPEN OPEN OPEN
OPEN OPEN
D13 D13
2
OPEN OPEN
R185 R185
OPEN OPEN
R186 R186
OPEN OPEN
Confidential - Do Not Copy VA712-1_VA712b-1
70
V33B
U17 U17
4 3
NC VSS
2
VDD
R161 R161
R162 R162 Open Open
Open Open
XAO
5 1 1 2
Td OUT
C256 C256
U17 U17
C255 C255 Open Open OPEN OPEN
21.45V
VRH
D9 D9
C507 C507
OPEN OPEN OPEN OPEN
(3-STEP)
R171 R171
OPEN OPEN
VRMS
R23 R23 OPEN OPEN
R172 R172
VGH_P
2 3
Q1 Q1
0603/0R/5% 0603/0R/5%
R24 R24
BSS84 BSS84
0603/5.6K/5% 0603/5.6K/5%
R26 R26
0603/16K/5% 0603/16K/5%
GVON
GVON
R28 R28
Q2 Q2
0603/10K/5% 0603/10K/5%
VGD
2N7002DW 2N7002DW
GVOFF
GVOFF
R29 R29
0603/10K/5% 0603/10K/5%
BR0N
ER0N
BR0P
ER0P
BR1N
ER1N
BR1P
ER1P
BR2N
ER2N
BR2P
ER2P
BCKN
ECLKN
BCKP
ECLKP
GMA1
GMA2
GMA3
GMA4
GMA5
VSA
VSA
VSA
VSA
VSA
GMA6
GMA7
GMA8
GMA9
GMA10
BG0N
EG0N
BG0P
EG0P
BG1N
EG1N
BG1P
EG1P
BG2N
EG2N
BG2P
EG2P
BB0N
EB0N
BB0P
EB0P
BB1N
EB1N
BB1P
EB1P
BB2N
EB2N
BB2P
EB2P
BSTHI
ESTH
VCOM
VCOM
VCOM
VCOM
VCOM
VCOM
VCOM
VCOM
VSD
VSD
VSD
VSD
OSTH
OR0N
OR0P
OR1N
OR1P
OR2N
OR2P
POL
POL
STB
STB
FCKN
OCLKN
FCKP
OCLKP
OG0N
OG0P
OG1N
OG1P
OG2N
OG2P
OB0N
OB0P
OB1N
R168 R168
OB1P
OPEN OPEN
OB2N
VRM
OB2P
OE
OE
CKV
CKV
STV
STV
XAO
XAO
R173 R173
GVOFF
PANEL_VGH
PANEL_VGH
0603/0R/5% 0603/0R/5%
PANEL_VGL
R25 R25 VGD
0603/2.2K/5% 0603/2.2K/5% VRL
VRM
VRH
ZD1 ZD1 R27 R27
OPEN OPEN
BZT52-C5V1S BZT52-C5V1S
CN4 CN4
45
45
44
44
43
43
42
42
41
41
40
40
39
39
38
38 VSD1 VSD1
37
37
VSD
36 1
36
GMA1
35
35
GMA2
34
34
GMA3
33
33 VSA1 VSA1
GMA4
32
32
GMA5 VSA
31 1
31
30
30
29
29
28
28
VCOM1 VCOM1
27
27
GMA6 26 VCOM 1
26
GMA7
25
25
GMA8
24
24
GMA9
23
23 VGD1 VGD1
GMA10
22
22
VGD
21 1
21
20
20
19
19
18
18 P_VGH1 P_VGH1
17
17
PANEL_VGH
16 1
16
15
15
14
14
13
13
P_VGL1 P_VGL1
12
12
PANEL_VGL
11 1
11
10
10
9
9
8
8
7
7 STB1 STB1
6
6
STB
5 1
5
4
4
3
3
2
2
POL1 POL1
1
1
POL
1
ESTH1 ESTH1
ESTH 1
FH12-45S-0.5SH FH12-45S-0.5SH
OSTH1 OSTH1
OSTH
1
CN3 CN3
STV1 STV1
45
45
STV
44 1
44
43
43
42
42
FSTHI 41
41
FR0N
40
40 CKV1 CKV1
FR0P
39
39
FR1N CKV
38 1
38
FR1P
37
37
FR2N
36
36
FR2P
35
35
34
34
OE1 OE1
33
33
32 OE 1
32
31
31
30
30
29
29
28
28
GVON1 GVON1
FG0N
27
27
FG0P GVON
26 1
26
FG1N
25
25
FG1P
24
24
FG2N
23
23
GVOFF1 GVOFF1
FG2P
22
22
21 GVOFF 1
21
FB0N
20
20
FB0P
19
19
FB1N
18
18
FB1P
17
17
FB2N
16
16
FB2P
15
15
14
14
13
13
12
12
11
11
10
10
9
9
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
FH12-45S-0.5SH FH12-45S-0.5SH