Egsm Rx - Samsung SGH-D520 Service Manual

Flow Chart of Troubleshooting
9-2. RF

9-2-1. EGSM RX

NORMAL CONDITION
catch the channel?
PAM601 Check
Pin12 ≥ -65dBm ?
PAM601 Check
Pin16 ≥ -65dBm ?
Pin21,22 ≥ -65dBm ?
Pin11,12,13,28,29 : 2.9V ?
Pin30,31 : 26Mhz?
Vp-p : 950mV?
Pin4, 5, 6, 7
Vp-p : 120mV?
U100
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Yes
Yes
Yes
U600 Check
Yes
U600 Check
Yes
U600 Check
Yes
U600 Check
Yes
CHECK!!
SAMSUNG Proprietary-Contents may change without notice
No
CHECK
ANT600, R604
No
RFS600,L603,L604,C619
resolder or change
No
PAM601
resolder or change
No
C610, C611, C619, F600
resolder or change
No
U100 pin #A13, C109,#C4 ,C100
resolder or change
No
OSC600
resolder or change
No
U600
resolder or change
9-13
contact?