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Flow Chart of Troubleshooting
10-2-5. DCS & PCS TX
NO
F100 Pin#6
About 2~3 dBm?
YES
CN101, C101
Check & Change
C139
= 3.7V?
Level of U508
Pin #30 is
1.2V?
YES
U508 pin#19
About -5 dBm?
U508 pin#45
High ?
Change U508
U106 Check
Pin#15,16,23,27,31
≥ 2.8V ?
U106 Check
Pin #17 : 13MHz ?
Vpp : 1.1V?
NO
U106 Pin
#4, = 1.7V?
Change U508
Check U302
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F100
Pin#16 = High?
YES
Level of
NO
F100 Pin#7 is
4~5dBm ?
YES
F100
Check & Change
NO
Check the
Battery Block
YES
NO
U302 TXP OK ?
YES
YES
NO
NO
Check U302
YES
NO
YES
NO
YES
YES
SAMSUNG Proprietary-Contents may change without notice
NO
U302
Check & Change
Continuous TX ON condition
TX Power Code : 500 code Applied
NO
Check
Check & Change
C110, 111, 118, 121, U302
Check or resolder
NO
R104 = 13MHz ?
Vpp : 1.2V?
YES
C105, R104
resolder
10-20
CH : 62
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF. Level : 10dBm
ATT. : 20dB
U302
NO
R102 = 1.5V ?
YES
OSC101
Change or resolder
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