Samsung SGH-X120, Service Manual

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SAM SU N G Proprietary-C ontents m ay change w ithout notice
SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams
2- 11
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JA C K _IN
EA R _SPK _N
EA R _M IC _N
A U D IO
EA R _SPK _P
EA R _M IC _P
C 418
V C C A
R418
R402
13K ,1%
R424
C 452
C 425
C
4
6
3
C 430
D 400
5
6
C 451
ZD 405
1 2 3
4
R 433
R 416
C
4
6
9
C
4
6
7
C 403
R403
C 404
62K ,1%
R 429
1
R434
Q 401
2
3
Z
D
4
0
7
V C C D
C 416
C 409
C 453
SPK400
Z
D
4
0
9
C 455
C 439
V B A T
C 420
C
4
6
0
C 408
Z
D
4
0
2
C
4
7
0
C 442
C
4
7
1
R 407
V C C D
R 432
V C C A
C 476
R425
C
4
7
3
C
4
7
2
R 422
C 421
C
4
6
2
G N D
1
SW VIN
5
_SH D N
4
R 421
U 400
FB 3
2
33U F
L403
C 441
C 445
L400
V C C D
C 401
R 426
C 447
R401
C
4
6
4
V C C A
C 443
M IC _P
C 440
C
4
5
9
R 431
V B AT
C
4
6
8
C 429
C 444
R 428
C 402
R404
N C 1
5
7
N C 2
N O 1
2
N O 2
10 1
V +
Z
D
4
0
1
U 401
3
C O M 1
9
C O M 2
6
G N D
IN 1
4
IN 2
8
C 432
C
4
5
8
8
V D D
V IC O N
4
W R B
11
PR EB
PR EG
32
33
PR ER
12
R D B
R STB
10
5
V B A TT
2
V C C 1
V C C 4
35
D 7
D 8
23
24
D 9
G N D 4
34
G N D 2
3
G N D 3
9
36
N C 1
1
N C 2
31
D 13
D 14
29
30
D 15
D 2
17
18
D 3
D 4
19
D 5
20
D 6
21
22
C 1+
C 1-
7
C SB
13
D 0
15
16
D 1
D 10
25
D 11
26
D 12
27
28
C N 400
A 0
14
6
R427
C 405
R435
C
4
6
6
C 417
V B A T
C 406
C 448
R 419
100K
/R
S
T
4
28
/W R
V C C D
Z
D
4
0
6
15
SPVD D
SPVSS
16
7
V
D
D
9
V
R
E
F
V
S
S
8
/C S
29
3
/I
R
Q
/R D
31 11
H PO U T-R
IO VD D
32
L
E
D
2
19
M
T
R
5
N
C
P
L
L
C
6
17
S
P
O
U
T
1
S
P
O
U
T
2
18
EQ 1
12
13
EQ 2
EQ 3
14
33
G
G
34 35
G
G
36
H PO U T-L/M O N O
10
D 0
27
26
D 1
25
D
2
D
3
24 23
D
4
D
5
22 21
D
6
D
7
20
U 402
$V
30
A 0
1
C
L
K
I
R 408
M IC _M
V C C D
R437
R 405
C 424
C 456
R 415
C 435
1N F
L401
3
4
C 431
F400
1
2
C 457
R 414
C 449
Z
D
4
0
8
1
2
3
4
5
6
C 434
C N 401
R 440
C 415
C 477
C 450
Z
D
4
0
4
R400
Z
D
4
0
0
C
4
1
0
R 417
1.2K
C
4
0
7
C
4
6
1
C 419
C 437
R 423
C 433
Z
D
4
0
3
8PF
C 438
NC
1
C 436
Q 400 2
3
L404
R 420
150K ,1% R 406
C
4
6
5
R 411
V C C A
R 430
L402
C 446
C 454
Y M U _IRQ
M EM _R ST
LC D _SEL
C P_W EN
C LK 13M _Y M U
D
(2
)
D
(3
)
D
(4
)
D
(5
)
D
(6
)
D
(7
)
Y M U _LED
V
IB
_
E
N
M
S
P
K
-
M
S
P
K
+
D (13)
D (14)
D (15)
A (3)
A (0)
M SPK -
M SPK +
V _B O O ST
D (1)
D (2)
D (3)
D (4)
D (5)
D (6)
D (7)
D (8)
D (9)
D (10)
D (11)
D (12)
D
(0
)
D
(1
)
D
(2
)
D
(3
)
D
(6
)
D
(7
)
D
(5
)
D
(4
)
D
(1
0
)
D
(1
1
)
D
(9
)
D
(8
)
D
(1
4
)
D
(1
5
)
D
(1
3
)
D
(1
2
)
M EM _R ST
D (0)
LC D _B A C K LIG H T_E N
LC D _B A C K LIG H T_C O N TR O L
V_B O O S T
SPK 1N
SPK 1P
A O U TA N
A O U TA P
SPK 1N
SPK 1P
A U D IO _O U T_SEL
EA R _SW ITC H
A O U TB P
A O U TB N
D (1)
D (0)
C P_W EN
C P_O EN
Y M U _EN
A U XO U T
A U XIN
M IC O U T
M IC IN
JA C K _IN