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