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Flow Chart of Troubleshooting
9-40
Check
RFS100
pin#
1≥
-65dBm ?
9-14-5. WCDMA 900 Receiver
Band : WCDMA
CELL POWER : -50dBm
Channel : 3013Ch
NORMAL CONDITION
catch the channel?
Check ANT contact ?
NO
YES
NO
Re-solder or change RFS100
YES
Re-solder or change U101
Check U101
pin# 20
≥
-65dBm ?
NO
YES
Re-solder or change F201
Check F201
pin# 1,8
≥
-65dBm ?
NO
YES
Re-solder or change OSC200, C272/C279
NO
Check
TCXO CLOCK
19.2MHz @ C272
YES
NO
U202 Check?
Change or re-solder U202
YES
UCD300
CHECK!!