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Flow Chart of Troubleshooting
10-18
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F100
CHECK
pin#20
≥
-65dBm ?
10-2-2. EGSM900 RX
Band : EGSM
CELL POWER : -50dBm
Channel : 62Ch
NORMAL CONDITION
catch the channel?
CHECK
ANT
contact ?
U100 Check?
F100 CHECK
pin#3, #4
≥
-65dBm ?
TCXO CLOCK
CHECK?
26MHz @ C111
F100, RFS100
re-solder or change
F100
re-solder or change
OSC401, C111
re-solder or change
U100
change or re-solder
UCP300
CHECK!!
NO
YES
NO
NO
NO
NO
YES
YES
YES
YES