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DUAL BAND Mobile
ELECTRONICS
Cellular Phone
SGH-A288
SERVICE Manual
DUAL BAND MOBILE CELLULAR PHONE CONTENTS
1. Exploded Views and Parts List
2. PCB Diagrams
3. Electrical Parts List
4. Block Diagrams
5. Flow chart of trouble shooting
F
C DE
C
AB MN
O
L
JK YZ
WX
I
GH V
TU
S
PQR
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
A A
U116
1 5
+VBATT VIN VOUT RTC_3V3
B 2 GND B
D110
3 BYPASS 4 MCL4154
C699 ON/OFF C208 C211
10UF/6.3V 10NF RTC_VCC
10UF/6.3V
C190 LP2985AIM5-3.3
100PF
L102 R701 C713 C194
47uH D108 1UF
CRS04-TE85L 1K 10NF
BTC-0309-470
C 3.3V C
1
BAT101
RB414II06N
R164 C209 C202
U117
2
200 100UF/6.3V 1UF
1 FB OUT 10
D D
2 LBI LX 9
3 _LBO GND 8 VCC AVCC
4 CLSEL BATT 7 U463
5 REF 5 4
_SHDN 6 PS1 GND
6 3
MAX1676EUB-T PS2/3 VO1
E E
C746 7 2
C203 NO VO2
9PF
1UF 8 1
VIN VO3
R5320G002A C328 C555
10UF/6.3V 27PF
C535 C700 C708
1UF 10UF/6.3V 10NF
F F
One Point Contact
AVCC One Point Contact
D107
UMN1
1
BB_PWR
3
R187 2 ON_OFF
G G
56K,5% 4
5
TEMPERATURE
RTC_3V3
R567
100K
C205 TH101
100NF
NTH5G40B473J01TE *
H R157 H
DCIN 3 100K
1
DCVOLT
R166 C186 R167 R168
100K 100NF 100K 100K 2
U111
MMBT2222AWT1
R161
10K
I FDG6323L I
4 3
VCC SIM_VCC 5 2 SIMDATA
C751
6 1 R698 27PF
8.2K
J R699 J
0 U649 U101
R103
6 1 10K 4 VIN,R1 3
VIN VOUT
V.C1-2
5 2 5 ON/OFF 2
C423 C1+ GND CN102
C745 V.C1-1
100NF 4 3 6 R1,C1 1 C107 1 C1 C5 4
C424 C1- MODE 10UF R2
10NF 2 C2 C6 5
47NF 6.3V SIMRST
C104 3 C3 C7 6
R421 LTC1986ES6 1UF FDG6323L SIMCLK
K 1M K
1318723-6 Engineer:
SIM_5V3V COMPANY NAME
SIM CONNECTOR
C749 C750 C748 Drawn by: SAMSUNG
(CL645-0001-3)
SIMPWDN_BOOT 27PF 27PF 27PF
R&D CHK: TITLE: Size:
R428
750K
DOC CTRL CHK:
DF_REV3.05 A3
SIMALIM MFG ENGR CHK: POWER MANAGEMENT & SIM INTERFACE
L L
Changed by: Date Changed: 2001.07.04 Time Changed: QA CHK: Page:
REV: Drawing Number: 1/9
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
A A
NC7SZ19
1 6
VCC VCC
B CN105 2 5 B
G VCC
1 2 R684 0
3 4 D(7)
D(6) R680 0 R685 0 D(5) 3 4
R681 0 5 6 R686 0
D(4) 7 8 D(3) VCC
D(2) R682 0 R687 0 D(1) R674
R683 0 9 10 R688 0 R675
D(0) 11 12 A(0) 10K
RD R690 NC R689 NC WR 10K
13 14 U640
BUZ- 15 16 RTC_3V3
RTC_3V3 17 18 MOTOR 6
C BACKLIGHT Y0 A 1 LCDCS C
19 20
21 22 RST 5
VCC SPK+ R119 VCC GND 2
23 24
SPK- 0 4 _E 3
100PF
100PF
100PF
100PF
100PF
100PF
100PF
100PF
100PF
27PF
Y1 LCDEN
C736
27PF
C735
AXK5F24335J
C123
LCD-CONNECTOR NC NC7SZ19P6X
C752
C753
C726
C727
C728
C729
C730
C731
C732
C733
C734
NC
NC
D D
CN503
Q101 Q107
DTC114YE 1 1 2 2 2SD2114KT146V
+VBATT 3 3 4 4 +VBATT
6
R141
5 5 6
E 3 VCC 3 1K E
2 7 7 8 8 1
RI_LIGHT 9 9 10
BACKLIGHT
10
1 11 11 12
MIC+ 2
12
MIC- 13 13 14
ON_OFF R149
14
15 15 16 16
KEYBOARD_COL(0) 100K
R706 KEYBOARD_COL(1) 17 17 18 18 KEYBOARD_COL(2)
100K KEYBOARD_COL(3) 19 19 20 20 KEYBOARD_COL(4)
U104 KEYBOARD_ROW(0) 22 KEYBOARD_ROW(1)
1 6 KEYBOARD_ROW(2)
21 21 22
KEYBOARD_ROW(3)
23 23 24 24
KEYBOARD_ROW(4)
F F
2 AXK6F24335
3711-004234
5 FPCB-CONNECTOR
U124
4 BCR10PN
3 6 1
KEYBOARD_COL(4)
BCR10PN 2
G KEYBOARD_ROW(4) G
ZD109 ZD112 ZD205
VC040205X150R 5
BCR08PN
1 6 4
3
KEYBOARD_COL(4)
2 5
KEYBOARD_ROW(3)
H 3 4 H
+VBATT
Q303
2SB1424 R320
I 82K,1% I
3
U639 1
BAT_VOLT
1 ISENSE DRIVE
6 2
L632 R671 C704
BLM11P600SPT 2 GND VSENSE
5 100K,1% 100NF
3 4
DCVOLT VCC PROG
J J
C710 LTC1734ES6-4.2#TR
C111 6.8UF ICHRG
27PF 16V
R328
2.7K
1%
K K
L:ON,H:OFF Engineer:
CHG_ON
COMPANY NAME
Drawn by: SAMSUNG
R&D CHK: TITLE: Size:
DOC CTRL CHK:
DF_REV3.05 A3
MFG ENGR CHK: LCD SCHEMATIC
L L
Changed by: Date Changed: Time Changed: QA CHK: REV: Page:
2001.07.04 Drawing Number:
2/9
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
A VCC A
VCC
Q108
C174 C173 2SA1576FRT106
100NF R156
U109 100NF 2
A(0:20) 10K
1
C6 S-A17 D10 F_WP
A(18) F-VCC E4
B 3 B
E5 F-A19 F-VCCW D9
A(20) S-VCC
A(19) G3 F-A18
1 A(18) G4 F-A17 B7 D(15)
6 DQ15 B9 R163