Skyworth 19E57, Service Manual

Page: 37 / 64

5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
USB0_D-
USB1_D1-_in
_in
+12V_1
+5V_USB1
+5V_USB1
+3.3V_Standby
+12V_NORMAL
USB0_D-
USB_ON
WITHOUT PRIOR NOTICE.
8M27 SCHEMATIC DIAGRAM (5)
THIS IS MAIN BOARD SCHEMATIC DIAGRAM,ONLY FOR REFERENCE.
SOME SPECIAL FUNCTIONS ARE OPTIONAL.IT IS SUBJECT TO CHANGE
Q25
3904 Q25
3904
1
2
3
R11 4.7K R11 4.7K
C156
NC
C156
NC
L1
FB
L1
FB
R76 NC/0 R76 NC/0
P10
USB_A
P10
USB_A
1
1
2
2
3
3
4
4
5
5
6
6
R73
56K_1%
R73
56K_1%
C120
22uF
C120
22uF
C106
1uF
C106
1uF
R59 5.1 R59 5.1
R74
22R
R74
22R
R60 5.1 R60 5.1
U209
MP1470
U209
MP1470
SW
2
GN
D
1
BST
6
IN
3
FB
4
EN
5
R80
10K_1% R80
10K_1%
C128
22uF
C128
22uF
D61
NC
D61
NC
1
2
L43
10uH/3A
L43
10uH/3A
D62
NC
D62
NC
1
2
C6
22uF
C6
22uF
R17 10K R17 10K
R75 75k R75 75k
R281
10K
R281
10K
R12
47K
R12
47K
C100
0.1uF
C100
0.1uF