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Flow Chart of Troubleshooting
10-13
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PAM100
CHECK
pin12
≥
-65dBm ?
10-2.RF
10-2-1. EGSM RX
CONTINUOUS RX ON
RF INPUT : 62CH
AMP : -50dBm
NORMAL CONDITION
catch the channel?
CHECK soldered
ANT
contact,C130,L101,C100,R100
RFT100
pin 17 : 2.9V ?
PAM100 CHECK
pin17
≥
-65dBm ?
RFT100
CHECK
pin29,30
≥
-65dBm ?
PAM100,RFS100
resolder or change
PAM100
resolder or change
RFT100
resolder or change
UCD300 pinF3, C311,C312
change or resolder
RFT100 CHECK
pin 19,20
freq :26MHz ?
Vp-p : 380mV?
OSC101
change or resolder
RFT100
resolder or change
RFT100
pin 2,3,22,23 Vp-p
: 120mV ?
NO
YES
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
F100 CHECK
pin6
≥
-65dBm ?
F100
resolder or change
YES
NO
GSM Receiver is O.K?
NO
GSM RX path component
resolder or change
YES
END