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Flow Chart of Troubleshooting
9-13
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9-2. RF
9-2-1. EGSM RX
NORMAL CONDITION
catch the channel?
No
CHECK
ANT600
,
R604
contact?
Yes
PAM601 Check
Pin12
≥
-65dBm ?
Yes
No
RFS600,L603,L604,C619
resolder or change
PAM601 Check
Pin16
≥
-65dBm ?
Yes
No
PAM601
resolder or change
U600 Check
Pin21,22
≥
-65dBm ?
Yes
No
C610
,
C611
,
C619, F600
resolder or change
U600 Check
Pin11,12,13,28,29 : 2.9V ?
Yes
No
U100
pin
#A13
,
C109
,
#C4
,
C100
resolder or change
U600 Check
Pin30,31 : 26Mhz?
Vp-p : 950mV?
Yes
No
OSC600
resolder or change
U600 Check
Pin4, 5, 6, 7
Vp-p : 120mV?
Yes
No
U600
resolder or change
U100
CHECK!!