ViewSonic VP2650WB Service Manual page 74

+ 2 4 _ 1 2 .5 V
Q 4
2 N 3 9 0 6 S
B
R 5 2
NC
R1
3 30
V R E F
R7 C7
C6
1 0K F
6 8 0 P J
1 0 0 P J
R8 R9
1 5 K 4 7 K
R 1 0 C 9
1 0K F 6 8 0 0 P K
R 1 4
1 0 K F
ViewSonic Corporation
+ 2 4 _ 1 2 .5 V
R 4 8
2 0 K J
R 4 9
2 0K J
R 5 0
Q 5
B
U S B _ P o we r_ ctrl
2 N 3 9 0 4 S
1 0 K
R 5 1
C 5 2
2 0K J
1 0 U Z
U1
T L 1 4 5 1 A CNS
V R E F
C1
1 U Z
R4
C2
7 5 K
1 U Z
R 1 1 2.7K
U S B _ P o we r_ ctrl
U S B _ P o we r_ ctrl
+ 2 4 _ 1 2 .5 V
L8
Z 600
C 4 6
3 3 0 P K
J 2
1
1
2
2
3
3
4
4
L9
5
5
L 1 0
6
6
L 1 1
7
7
L 1 2
8
8
L 1 3
9
9
2 K 6 1 1 8 5 1 0 9
TP25 T P 2 4 TP23 T P 2 2 T P 2 6
T P 3 0 T P 2 9TP28 T P 2 7
71
Confidential - Do Not Copy
+ 2 4 _ 1 2 .5 V
2007/11/2 change R50 from 20K to 10K
2007/11/2 change R51 from 10K to 20K
2007/11/2 change C8 from NC to 1U
R2
3 .3K R3
2 0 K J
R5
Q 1 22
B
C3 2 N 3 9 0 4 S
+ G
2 2 0 U 3 5 V M
< S p e c>
Q 3
2 N 3 9 0 6 S
B
Z 6 00
1 _ 2
Z 6 00 + _ -
Z 6 00 A M B E R
Z 6 00
B L U E
Z 6 00 S o f t _ P o we r
C 4 7 C 4 8 C 4 9 C 5 0 C 5 1
3 3 0 P K 3 3 0 P K 3 3 0 P K 3 3 0 P K 3 3 0 P K
VP2650wb-1
TP40
T P 3 2
2 K K 2 0 8 7 0 0 7
G1
1
2
1 _ 2
3
4 + _ -
A M B E R
5
6 B L U E
S o f t _ P o we r
7
G2
TP34 T P 3 3
J 1
T P 3 9 TP38 T P 3 7
L1
4 7 U K
2 S J5 9 8 -A Z
F D 1 F D 2 C 4 C5
+ +
Q 2
2 2 0 U 2 5 V 2 2 0 U 2 5 V
S S 2 4 -L F S S 2 4 -L F R C 6 4 0 5 0 0 0 HRS R C 6 4 0 5 0 0 0 HRS
+ 5 V _ US B
R6
3 .01K F
C 8
1 U Z
R 1 2
R 1 3 NC
1 K F
ViewSonic Corporation
Model
Title
USB POWER CIRCUIT
Date Rev: