ViewSonic VP2030b-1 Service Manual page 75

CN7 +12V
1
2
3
C199
4
330pF
5
R217
6
ADJ 24K
+20V
7
ON/OFF
8
R218
12K/1%
U16
L23
3 2
+5V
VIN VOUT
CX000800000
1
ADJ/GND
AIC1084/TO252
+
U18
0.8A Max
L25
3 2
+5V VIN VOUT
CX000800000
1 4
ADJ/GND 4
LT1117/TO223
+
U20
L26
3 2
+5V
VIN VOUT
CX000800000
1
ADJ/GND
AIC1084/TO252
+
1 3
+3.3V
2 4
RBS31 TOPVIEW
U19 RBS31
R179 220R
1 4
+3.3V SWITCH 5
2 3
Viewsonic Corporation
C200
R220
C203
1nF 0R
0.1u
U23
1 8
CS VIN
2 7
ITH/RUN BOOST
3 6
FB DRI
4 5
GND SW
C202
AIC1577 0.1u R222
47
C201 1nF
SPL1040PT
Vout=0.8(12K+62K)/12K=4.93
R219
62K/1%
Modify Power AIC 1563 to
AIC 1577
+3.3V
+5V
+ 1
R82 C167
2200P/6
82K/6
R83
+2.5V
10K/6
Q3
DTC144EUA
2
+
C
3
B 2 1
E
+1.8V
+
2
1 3
H1 MTH276D126
AIC1084/TO252 TOP VIEW
2
3
2 4
5
1 3
AIC1084/TO252 TOP VIEW
72 Confidential - Do Not Copy
+12V
CX000800000
L29
1 2
3
+5V
L28 100uH CX000800000
L30
2 1 1 2
D28 2
1
½u 1,½u 2ªº¦a-n©Ô¦^ÂI
USB_VDD
Q10 SI2301DS
3
C170 C169
R84
C168
10K/6 330U/16V 0.1U/6
2200P/6
D
3
G 2 1
S
USB_VDD
USB_CTRL 4 CN6
4 3
2 1
ENTERY_3273-G04N
¾ã¶ô½u¸ô¾aªñ CN6,C169,C170§ó-n¾aªñ CN6
H2 MTH276D126 H3 MTH276D126
9 2 9 2 9
8 3 8 3 8
1 1 1
7 4 7 4 7
6 5 6 5 6
VP2030b-1
+20V L32
1 2
CX000800000/NC
L16
+18V
CX000800000/NC
L17
+12V
CX000800000/NC
L18
+5V
CX000800000
3,D28 L28 C216-n¤¬¬Û¾aªñ
R161 0R(NC)
3
R162 4.7K
2
5 PPWR
1
R216
0/NC
5 PBIAS
5 INVSW
MMBT3904L TOP VIEW
5 BRIGHTNESS
H4 MTH276D126
2 9
3 8
1
4 7
5 6
+18V
U24
1 3
VIN VOUT
MC7818/CASE936/NC
Panel_Power
Q4
AO4411
L20
1 8
CX000800000
2 7
3 6
4 5
+5V
ON/OFF
R168 0R
3
R170 4.7K/NC
2
1
+5V
3
R175 100K ADJ
2 1
3
R177 4.7K
2
1
ViewSonic Corporation
POWER
Model
Title
Date Rev: