Samsung GT-M5650 Service Manual page 56

9-12-2. EGSM900 RX
NORMAL CONDITION
catch the channel?
YES
PAM100 CHECK
pin#17 ≥ - 55 dBm?
YES
PAM100 CHECK
pin#15 ≥ - 55 dBm?
YES
F100 CHECK
pin#6 ≥ - 55 dBm?
YES
Rx Path CHECK
U102 pin#46 ≥ - 55 dBm?
YES
OSC CLOCK CHECK
U102 pin#17,18
freq:26MHz?
YES
U102 CHECK ?
YES
UCP300 CHECK!!
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NO
CHECK
ANT contact
NO
RFS100, C104, L102
re-solder or change
NO
PAM100
re-solder or change
NO
F100
re-solder or change
NO
C109, L104
re-solder or change
NO
OSC100
re-solder or change
NO
U102
change or re-solder
9-29
Flow Chart of Troubleshooting
Band : GSM900
CELL POWER : -50dBm
Channel : 62Ch