Samsung SGH-B300 Service Manual page 22

Flow Chart of Troubleshooting
ZD502
C506
R515
R514
R513
R509
VR501
C505
R508 VR502
C501
C502
VR503
R501
U503
TA502
TA501
U501
C300
R430
C407
C313
C310
C206
C314
C308
C309
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C510
TA500
BTC500
R438
R214 R405 C412
U400
L503
C416 R410
R408
R415
R507 R504
R435
R428 C418
R443
U402
C433
C434
R446
R444
R427 C417
TP300
R211
Q300
DSP_IO
INTRQ
C208
C216
OSC200
C217
ANT
GSM_RX
GSM_TX
DCS_RX
DCS_TX
FM_RADIO
SPK
MAIN_MIC
EAR_SPK
EAR_MIC
POWER_ON
SIM
CHARGING
LCD
MOT
CLK
TA_VEXT
R306
ICHRG
R307
JIG_ON_IF
C305
C306
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C304
R309
R308 R306
C431
R442
C429
C428
C424
C421
R440
R432
R439
C420
C419
C423
C207
C210
C213
VBAT
U301
1 IN 8
BATT
7
2 GND
_POK|
ISET 6
3
_EN|
4 5
ABI ABO
GND
9
C304
C307
R308
10-10
CHG_DET
CHG_OFF
JIG_ON
R309