Service manual

Schematic Diagrams
+3V, +5V, +12V (71-M1900-D02) B - 30
Schematic Diagrams
+3V, +5V, +12V
Sheet 28 of 34
+3V, +5V, +12V
VL
SYS3V
SYS5V
12V
VIN
VL
VL
12V +5VVDD5+3V12V VDD3
VL
VDD3
VDD5
+5VH8
SYS3VSYS3V
VIN
VIN1(27,29,30)
DD_ON(22,23)
DD_ONH (29,30)
VIN1(27,29,30)
12VIN
2.5VR
V+
3VON
5VON
V+
DD_ON#
3VON
5VON
12VIN
DD_ON#
DD_ON#
VIN
PQ32A
FDS6982S
5
4
3
6
PQ32B
FDS6982S
7
2
1
8
PD20
1SS355
A C
PC115
10U/25V
+
PC105
220U
PC122
10U/25V
PC39
1U
PC113
10U
PD23
RB751V
A C
PD22
RB751V
AC
+
PC36
150U
+
PC104
10U
PL7 CDRH125-100-122
4 3
21
PC32
10U/25V
PC37
0.1U(0805)
PC108
0.1U(0805)
PC33
0.1U
PC120
0.1U
PC118
0.1U
PC119
0.1U
PU5
MAX1632
25
27
26
24
1
2
9
22
3
6
15
10
11
8
21
18
16
17
19
14
13
12
5
4
28
7
23
20
BST3
DH3
LX3
DL3
CSH3
CSL3
REF
V+
FB3
SYNC
SEQ
SKIP
RESET
GND
VL
BST5
DH5
LX5
DL5
CSH5
CSL5
FB5
VDD
12VOUT
3VON
5VON
SHDN
PGND
PR104
47K
PQ34
Si4800
4
6 2
5
7 3
1
8
PC112
0.1U(0805)
PC31
0.1U(0805)
PC125
47P
PC44
100P
PC106
47P
PC43
100P
PQ29A
FDS6982S
5
4
3
6
PQ29B
FDS6982S
7
2
1
8
PC26
1000P
PQ30
DTC114EUA
C
E
B
PC30
1000P
PC102
0.1U(0805)
PR99
47K
PQ24
2N7002
G
DS
PQ28
Si4800
4
6 2
5
7 3
1
8
PQ31
2N7002
G
DS
PJ10
6mm
1 2
PJ9
6mm
1 2
+
PC114
10U
PQ7
DTA114EUA
CE
B
PR36 10K
PR41 10K
PR35
33K
PR37 10K
PR97
10K
PQ19
2N7002
G
DS
PQ20
DTA114EUA
C
E
B
PR96
10K
PC100
0.1U
PQ23
DTC114EUA
C
E
B
PC41
0.1U(0805)
PJ11
2mm
1 2
PR111 0
PR105
10
PR98
1M
PR34
12m(2512)
PR51
10K_1%
PR48
3.6K_1%
PJ8
2mm
1 2
+
PC35
150U
PR49
10.7K_1%
PR127
2M
PR113 0
PR112
10K
PR121
R(R)
PR123
0
PR120
0
PR122 R(R)
+
PC25
220U
+
PC28
10U/25V_O
+
PC23
10U/25V_O
PR43
12m(2512)
PL6
CDRH-1205-100
PR32
0(0805)
PR50
10K_1%
PD24
11FS2
A C
4A
4A
5A
0.1A
0.1A
Idle Mode
PWM Mode
300khz
5A
2A
2A
5A
5A 5A
5A