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Flow Chart of Troubleshooting
9-28
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PAM100 CHECK
pin#17
≥
-
55
dBm?
9-12-1. EGSM850 RX
Band : GSM850
CELL POWER : -50dBm
Channel : 160Ch
NORMAL CONDITION
catch the channel?
CHECK
ANT
contact
U102 CHECK ?
PAM100 CHECK
pin#16
≥
-
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#44
≥
-
55
dBm?
C101, L100
re-solder or change
YES
NO
F100 CHECK
pin#9
≥
-
55
dBm?
F100
re-solder or change
NO
YES