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Level 3 Repair
8-30
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Check F100
Pin#3
-55dBm
8-3-17. EGSM 900 RX
Band : GSM900
CELL POWER : -50dBm
Channel : 62CH
NORMAL CONDITION
Catch the channel?
check ANT contact
END
NO
YES
Check U101
Pin#48,Pin#49
-55 dBm
L105, L106, L107
re-solder or change
NO
Check F100 ENABLE
C142,C143
0V
C144,C145
2V
Change PBA
NO
YES
YES
YES
RFS100,C112,C116,C103
change or re-solder
NO
Check F100 VBAT
Pin#9
2.5V
Change PBA
NO
Check TCXO CLOCK
19.2MHz @ C210
OSC100, C210
re-solder or change
NO
YES
YES
Check U101
YES
U101
re-solder or change
NO