Samsung SGH-A500 Service Manual page 30

SGH-A500 Flow Chart of Troubleshooting and Circuit Diagrams
18. Power Management Circuit Diagram
1
A
EP_SD A
B
POWER_O N
RTCOUT
C
VCXO_EN
D
E
F
1
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2 3
VINT
R603
20 K
16
15
EP_SC L
13
KP9
Q602
26
3
2
40
1
KP0
19
R609
47K
38
14
EP_INT
R604 1K 17
RESETQ
C630
220N F
29
28
R602
154K,1%
C613
100N F
27
2 3
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4 5
VBA T
C615
2.2UF
16 V
C614
100UF
R60 6
0.1 6.3 V
L601
0
U601
7
SD A VDDCH
4
SC L VCHC
VSSD
5
VCHS
VSSD
6
C602
VSSD VBAT S VDD_SD
10UF
8
VDDPW
9
L602 22uH X5R TYPE
SW
18
FB
C60 1
ON
10U F
10
X5R TYPE
VSSP W
39
VDDA
3
VANA
VCXOE N 23
VDDB
INTOUT
24
/RESET VINT
22
V3 V
30
VRT C
IREF
21
VSIM
BYP
25
VSSA
35
VDDRF
VSSR
31
VRF 1
37
VRF 2
36
VRF 3
X7R TYP E
Changed by
user10
4 5
6-16
6 7
C604
10U F
10V
U60 2
1 ISENSE
6
DRIVE
GND
2 5
VSENSE
3 VCC PROG 4
VBA T
VANA R61 1
2.7K
1%
VBA T
VINT
V3V
VRTC
VSI M
VBA T
VRF1
VRF2
R610
1K
Engineer
user 3
Drawn by
user 3
R&D CH K
TITLE :
DOC CTRL CH K
SGH-A500_REV1.9 B
MFG ENGR CH K
Date Changed Time Changed QA CH K REV
2002 -09 - 30
1:51:59 pm 1.9B
6 7
8
A
TA +
B
Q601
4
3
12 56
ISENSE
C
U60 5
1
6
5
2
4 3
D
E
COMPANY NAME
Address
F
City
Size
A3
Drawing Numbe r
Shee t 6 of 6
8