ViewSonic VA712b-1 Service Manual page 74

POWER
VPREF
VOP1 VOP1
R35 R35 0805/24R/1% 0805/24R/1% D5 D5
L27 L27
VAA VOP VOP VOP
1 2
VAA
MHC2012S420R MHC2012S420R
C66 C66 C67 C67
R38 R38 R39 R39
1210/10u/16V/5 1210/10u/16V/5
0603/100n/25V/Y 0603/100n/25V/Y 1 2 1
0603/18K/1% 0603/18K/1%
0603/0R/5% 0603/0R/5%
V5A
C76 C76
R163 R163 0603/100n/25V/Y 0603/100n/25V/Y
0603/2.2K/5% 0603/2.2K/5%
U7A U7A
3
+ +
1
2
- -
R165 R165 C505 C505
0603/2.2K/5% 0603/2.2K/5% 1210/10u/16V/5 1210/10u/16V/5
QP20 QP20
VCM_PWM
1 2N7002/RoHS 2N7002/RoHS
VCM_PWM
VPREF
R55 R55
0603/10K/1% 0603/10K/1%
U7B U7B
5 0603/20R/5% 0603/20R/5%
+ +
7 R57 R57
6
- -
R58 R58
LM358DR2 LM358DR2
0603/11K/1%/RoHS 0603/11K/1%/RoHS C88 C88
1210/10u/16V/Y 1210/10u/16V/Y
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VPREF
R32 R32
OPEN OPEN
C59 C59 1210/10u/16V/Y 1210/10u/16V/Y
1 2
VR1 VR1
VSCOM 4.0V
2
AMC431BDBT AMC431BDBT OPEN OPEN
1 3
2.5V
R36 R36 C68 C68
R40 R40 R41 R41
2 1 2 1 2 OPEN OPEN
OPEN OPEN
0603/6.2K/1% 0603/6.2K/1% 0603/0R/5% 0603/0R/5%
VCM1 VCM1
4.0V
U18 U18
VCM VCM
NCP1117STAT3 NCP1117STAT3
VOP
3 2
Vin Vout
1206/22u/10V/Y 1206/22u/10V/Y
R187 R187
R164 R164 C503 C503 C504 C504
0603/100n/25V/Y 0603/100n/25V/Y
1206/270R/5% 1206/270R/5%
0603/4.7K/5% 0603/4.7K/5%
LM358DR2 LM358DR2
C91 C91
1 2
VCN 6.0V
open open
GMA1
C93 C93
1 2
C89 C89 open open
GMA3
C95 C95
0603/100n/25V/Y 0603/100n/25V/Y 1 2
open open
GMA5
GMA7
C97 C97
1 2
open open
GMA9
C99 C99
1 2
open open
GMA10
C101 C101
1 2
Open Open
Confidential - Do Not Copy VA712-1_VA712b-1
71
VPREF1 VPREF1
1
VPREF VPREF
R30 R30
0603/4.7R/1%/RoHS 0603/4.7R/1%/RoHS
V5A
C57 C57 VS1
0603/100n/25V/Y 0603/100n/25V/Y
GMA1 GMA1
R31 R31
0603/220R/1%/RoHS 0603/220R/1%/RoHS
GMA1 GMA1
C58 C58 VS2
0603/100n/25V/Y 0603/100n/25V/Y
GMA2 GMA2
R33 R33
0603/46.4R/1%/RoHS 0603/46.4R/1%/RoHS
GMA2 GMA2
C60 C60 VS3
0603/100n/25V/Y 0603/100n/25V/Y
GMA3 GMA3
R34 R34
0603/27.4R/1%/RoHS 0603/27.4R/1%/RoHS
GMA3 GMA3
C65 C65 VS4
0603/100n/25V/Y 0603/100n/25V/Y
GMA4 GMA4
R37 R37
0603/140R/1%/RoHS 0603/140R/1%/RoHS
GMA4 GMA4
C69 C69 VS5
0603/100n/25V/Y 0603/100n/25V/Y
GMA5 GMA5
R42 R42
0603/43.2R/1%/RoHS 0603/43.2R/1%/RoHS
GMA5 GMA5
C70 C70 VCN
0603/100n/25V/Y 0603/100n/25V/Y
VCN1 VCN1
R43 R43
0603/10.2R/1%/RoHS 0603/10.2R/1%/RoHS
VCN VCN
C71 C71 VS6
0603/100n/25V/Y 0603/100n/25V/Y
GMA6 GMA6
R45 R45
0603/165R/1%/RoHS 0603/165R/1%/RoHS
GMA6 GMA6
C77 C77 VS7
0603/100n/25V/Y 0603/100n/25V/Y
VCM
GMA7 GMA7
R49 R49
0603/41.2R/1%/RoHS 0603/41.2R/1%/RoHS
GMA7 GMA7
C78 C78 VS8
0603/100n/25V/Y 0603/100n/25V/Y
GMA8 GMA8
R51 R51
0603/56.2R/1%/RoHS 0603/56.2R/1%/RoHS
GMA8 GMA8
C81 C81 VS9
0603/100n/25V/Y 0603/100n/25V/Y
GMA9 GMA9
R52 R52
0603/243R/1%/RoHS 0603/243R/1%/RoHS
GMA9 GMA9
C82 C82 VS10
0603/100n/25V/Y 0603/100n/25V/Y
GMA10 GMA10
R54 R54
0603/11R/1%/RoHS 0603/11R/1%/RoHS
GMA10 GMA10
VOP
C90 C90
VOP
open open
U8 U8
1 28
VDD VSS
VS1 VS2 C92 C92
2 27 2 1
INA INL
3 26 open open
OUTA OUTL
VS3 VS4 C94 C94
4 25 2 1
INB INK
open open
5 24
OUTB OUTK
VS5 VS6 C96 C96
6 23 2 1
INC INJ
7 22 open open
OUTC OUTJ
8 21
OUTD OUTI
VS7 VS8 C98 C98
9 20 2 1
IND INI
open open
10 19
OUTE OUTH
VS9
11 18
INE INH
12 17
OUTF OUTG
VS10 13 16
INF ING
14 15
VOP VDD VSS
open open
C102 C102
VOP
open open
V5A
L25 L25
U4 U4
AIC1722-33CX AIC1722-33CX
MHC2012S420R MHC2012S420R
3 1
Vin Vout
C53 C53 C54 C54 C55 C55
1206/22u/10V/Y 1206/22u/10V/Y 0603/100n/25V/Y 0603/100n/25V/Y 1206/22u/10V/Y 1206/22u/10V/Y
L26 L26 U5 U5 AMC1117-3.3SK AMC1117-3.3SK
MHC2012S420R MHC2012S420R
3 2
VI(5V) VO(3.3V)
4
VO(3.3V)
C61 C61 C62 C62 C63 C63
1206/22u/10V/Y 1206/22u/10V/Y 1206/22u/10V/Y 1206/22u/10V/Y
0603/100n/25V/Y 0603/100n/25V/Y 0603/100n/25V/Y 0603/100n/25V/Y
U6 U6 AIC1084CM AIC1084CM
L28 L28
D7 D7 D8 D8
MHC2012S420R MHC2012S420R
1 2 1 2 3
VI(5V) VO(ADJ)
VO(ADJ)
B340/A B340/A B340/A B340/A
0603/680R/5% 0603/680R/5%
R44 R44
C72 C72 C73 C73
1206/22u/10V/Y 1206/22u/10V/Y 0603/100n/25V/Y 0603/100n/25V/Y 1206/22u/10V/Y 1206/22u/10V/Y
R46 R46
0603/680R/5% 0603/680R/5%
V33A
Q3 Q3
2 3
R53 R53 C83 C83 AP2305N AP2305N
0603/4.7K/5% 0603/4.7K/5%
0603/1n/50V/7 0603/1n/50V/7
0603/10K/5% 0603/10K/5%
Q4 Q4
R56 R56 + + C86 C86
1 1210/10u/16V/Y 1210/10u/16V/Y
PANEL_ON/OFF
2N7002/RoHS 2N7002/RoHS
C87 C87
Open Open
R59 R59
0603/0R/5% 0603/0R/5%
VS1 GMA1
R60 R60 0603/0R/5% 0603/0R/5%
VS2 GMA2
GMA2
R61 R61 0603/0R/5% 0603/0R/5%
VS3 GMA3
GMA4
R62 R62 0603/0R/5% 0603/0R/5%
VS4 GMA4
R63 R63
0603/0R/5% 0603/0R/5%
GMA6
VS5 GMA5
GMA8
R66 R66 0603/0R/5% 0603/0R/5%
VS6 GMA6
R68 R68 0603/0R/5% 0603/0R/5%
VS7 GMA7
R69 R69
0603/0R/5% 0603/0R/5%
VS8 GMA8
R70 R70 0603/0R/5% 0603/0R/5%
VS9 GMA9
R72 R72 0603/0R/5% 0603/0R/5%
VS10 GMA10
V33A1 V33A1
V33A
1
V33A TP
TP TP
(Digital VCC)
C56 C56
0603/100n/25V/Y 0603/100n/25V/Y
V33C1 V33C1
V33C 1
V33C TP
TP TP
(SCALER VCC)
C64 C64
V25V1 V25V1
V25V
1
TP
TP TP
L29 L29
MHC2012S420R MHC2012S420R
2
V25V
4
C74 C74 C75 C75
0603/100n/25V/Y 0603/100n/25V/Y
(Panel VCC)
V33B
C85 C85 C84 C84
+ +
0603/100n/25V/Y 0603/100n/25V/Y 1210/10u/16V/Y 1210/10u/16V/Y