Service manual
Schematic Diagrams
+VDD5, +VDD3, +3V, +5V, +1.25V B - 31
B.Schematic Diagrams
+VDD5, +VDD3, +3V, +5V, +1.25V
+VDD3
VIN
VL
VIN
VIN1
VL
GND_F
+VDD5
GND_F
GND_F
GND_F
GN D_ F
GND_F
GND_F
GN D_ F
VL
+5VS
+5V H8
DF1
VIN
+VDD3
DF2
DF2
DF2
VL
DF2
+VDD5
+1.25V
DF1
DF1
VIN
DF2
VIN 1
+VD D5
DF2
DF2 DF1
+2. 5V
+V DD5
+VDD5 A
+12 V+12V+
+VDD5A
DF1
VL
+12V 8, 20,2 1,23, 26, 28,2 9,32
+VDD 5 9,13, 16, 19,2 3,26, 29, 32, 34,36
VIN 1 29,36
VIN 1 6,2 9,31, 32,3 4,36
+VDD3 4,8,13,16,19,23,29,31
+5VS 8,11,14,16,19,22,23,26,28,29,33,34,35,36
+5VH 8 22,28, 29
VDD IOFB_L4
VDD IOFB_H4
SUSC #4,13,22
PGOOD 3 3
+1. 25 V 3, 4,7
+2.5V 3,4,5,6,7,16,33
SUSB29, 34
TE ST 29 , 32
DDON22,24 ,29
TR MTR I P# 4 , 34
Z 3019
Z3017
V+
Z3018
Z3021
Z3010
Z3007
Z3002
Z3004
Z3011
Z3013
V+
Z3023
Z3008
Z3006
Z3020
Z3015
Z3001
Z3031
Z 3025 Z30 27
Z3028
Z3029
Z3030
Z3009
Z3026
Z3024
VDDP
Z3036
Z3054
Z3045
Z3041
VDDP
Z3035
Z3042
Z3040
Z3038
Z3051
Z3043
EN _DUAL2 .5V
Z3039
Z3055
Z3047
Z3044
Z3046
Z3050
Z3048
TEST
Z3037Z3053
Z3069
Z3064
Z3070
Z3071
Z3005
Z3012
Z3034
Z3003Z3066
Z3068
Z3052
Z3049
Z3 073
Z3058
Z3057 Z3060
Z3061
Z3063
Z3016
Z3056 Z3059
Z3062
Z3022
Z3032 Z3033
D46
1SS35 5
AC
D45
1SS355
AC
PR66
174K_ 1%
PL6 6.8 uH
1 2
PC103
0.01U
PR61
20K_1%
PR112
22. 1K_ 1%
PD24
1SS355
AC
PR63
40.2K_1%
PR 110
100K
R642
910K_1%
+
PC99
10U _25V_120 6
PC105
0.04 7u
C504
1U
C507
0.1U
12
T
PD23
1SS355
A C
C514
0.1U
PC52
10U _25V_12 06
PR105
15K
PR69
5m_2512
PL3 4. 7UH
PR102
0
PC90
10U_25V_DIP
PU6
SC4501
1
8 3
4
2
7
6 5
11
10
9
COMP
IN SHDN#
GND1
FB
SW2
SW1 GND 2
GND_EARTH
SS
ROSC
+
C460
220U_4V_7343
12
PC6 9
1000P
PJP2
5mm
1 2
PR111
1K
PC62
0.1U
R653
9.76K_1%
12
R668
100K
C458
10U_1206
D53
SM140A
A C
Q97
2N7002
G
DS
PR7 1
0
C694
0.1U
D35
SM340A
A C
PC63
0.1 U
PC9 4
0.1U
PR72
1M
PC101
10U_1206
PR77
19. 1K_ 1%
C703
1000P
1
2
PC91
10U_25V_DIP
PR6 8
5m_2512
PC73
33P
R447
20K
1 2
Q82
RQA130N03
3
4
8
2
5
67
1
..
G
D
S
D,
.D.
,
R651
0
PR6 7 10K
PC102
0. 1 U
SC1486
U28
SC1486 ITSTR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
PGND1
DL1
VDDP1
ILIM1
LX1
DH1
BST1
REFIN
TON 2
REFOUT
VCC A2
FBK2
PGOOD2
AGND2
PGND 2
DL2
VDD P2
ILIM2
LX2
DH2
BST2
EN/ PSV1
TON 1
VOUT1
VCC A1
FBK1
PGOOD1
AGND1
PC5910U _25V_120 6
PQ29
RQA130N03
3
4
8
2
5
6 7
1
..
G
D
S
D,
.D.
,
PD22
SM340A
A C
+
PC9 2
10U _25V_1 206
PC104
2200P
R667
0
1 2
PQ40
2N7002
G
DS
+
PC93
10U_25V_1206
PU5
LTC3728LX
24
26
25
22
30
31
3
23
1
2
5
4
7
6
20
17
14
15
18
12
11
9
8
21
28
13
27
19
10
16
29
32
33
BOOST1
TG1
SW1
BG1
SENS E1+
SENS E1-
PLLIN
VIN
VOSENS E1
PLLFL TR
ITH1
FCB
3.3VOUT
SGND
INTVCC
BOOST2
TG2
SW2
BG2
SENSE 2+
SENSE2-
VOSENSE2
ITH2
EXTVC C
RUN/SS1
RUN/SS2
PGOOD
PGND
NC
NC
NC
NC
PAD
R663
0
PC60
0.01U
PQ39
AO3409
G
DS
Q64A
SI4834
5
4
3
6
C740
0. 1U
R678
20K
PR74
105K_1%
PR113
10K
PR70
*0
L43
2.5UH
1 2
+
PC54
220U_6.3V_7343
R640
16.2K_1%
12
PR107
15K
+
C436
220U_4V_7343
12
PC74
*0.01U
PC68
1000P
R448
18K_1%
1 2
PR106
*0
R664
10K
PR59
0
PR99
0
C692
0.1U
PR104
*0
PR96
0
R652
750K_1%
C745
0.1U
PC57
0. 01U
PD20
ZD5.6V
A C
PC67
0.1U
Q81
RQA200N03
3
4
8
2
5
67
1
..
G
D
S
D,
.D.
,
C506
*0.1U
PR95
0
R654
0
C510
1U
1
2
R444
10K
PL5 4.7U H
C689
10U_25V_DIP
R440
0
+
PC53
220U _6.3V_7343
+
C508
330U_2.5V_7343
12
PQ31
RQA130N03
3
4
8
2
5
67
1
..
G
D
S
D,
.D.
,
PC66
0.1U
+
PC100
10U _25V_12 06
R666
4.7K
R644
0
Q84
2N7002
G
DS
C693
0.1U
D34
SM340A
A C
PR62
0
PQ30
RQA200N03
3
4
8
2
5
6 7
1
..
G
D
S
D,
.D.
,
PQ35
2N7002
G
DS
+
C509
330U_2.5V_7343
12
PR76
19.6K_1%
C505
100 0P
12
PR78
0
PR101
1M
T
C702
100 0P
12
Q83
2N7002
G
DS
R655
10K_1%
12
PC65
0.1U
T
C503
*100P
1
2
R646
10
1 2
PR1 03
0
C512
1U
1
2
C435
0.01U
1
2
PC6 1
10U_25V_1206
PQ34
2N7002
G
DS
R641
0
12
PJP1
5m m
1 2
PC97
100P
Q64B
SI4834
7
2
1
8
PR75
60. 4K_ 1%
R449
10
1 2
C690
10U_25V_DIP
R446
10K
PC58
0.1U_X7R
PC6 4
0.1U
Q70
*2N7002
G
DS
PC98
10U_0805
PC71
*100P
R443
*0
R445
4.7K
+
C496
220U_4V_7343
12
L57
4.7UH_S39
1 2
PQ28
RQA200N03
3
4
8
2
5
67
1
..
G
D
S
D,
.D.
,
J4
OPE N _8A
1 2
PC95
0.1U
PC56
0.01U
PC96
1000P
PR73
0
R645
68.1K_1%
12
R636
*0
C695
100P
1
2
PC70
2200P
T
C499
0.1U_X7R
1
2
PR100
0
C511
0.1U
1
2
C691
1U
1
2
C455
0.1U
T
+
PC51
*220U _6.3V_7343
J7 OPEN _10mil
12
C457
10U_1206
1
2
C502
0.01U
1
2
PC72
33P
T
C456
0.1U
1
2
+
PC50
220U _6.3V_7343
J5
OPEN_5A
1 2
C742
0.1U
Q69
2N7002
G
DS
C513
1U
1
2
PC55
0.1U
+
PC108
220U_6.3V_7343
PR114
10K
FCB:0V for continuous mode
Open for burst mode
5V for constant mode
PLLFLTR:0V for 220KHZ
5V for 640KHZ
7A
5A
12/13
2.6V@8A
1.3V@3A
DDR VTT Pow er savi ng
0.7A
94/7/25
Allen
94/7/25
Allen
94/7/25
Allen
94/7/2 5
Allen
PIN11 GND PAD
94/11/09
94/11/16 Kevin
DEL DUAL _PG
94/10/31 Kevin
AO4900 Change SI4834
94/11/11 Kevin
94/11/11 Kevin
94/11/11 Kevin
94/11/11 Kevin
Sheet 31 of 45
+VDD5, +VDD3,
+3V, +5V, +1.25V