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Flow Chart of Troubleshooting
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9-35
Check
RFS100
pin#
1≥
-65dBm ?
9-14-2. EGSM Receiver
Band : GSM
CELL POWER : -50dBm
Channel : 37Ch
NORMAL CONDITION
catch the channel?
Check ANT contact ?
NO
YES
Re-solder or change RFS100
NO
YES
Re-solder or change U101
NO
Check U101
pin# 14,15
≥
-65dBm ?
YES
Re-solder or change OSC200, C272/C279
NO
Check
TCXO CLOCK
19.2MHz @ C272
YES
U202 Check?
Change or re-solder U202
NO
YES
ucd300
CHECK!!