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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
3-17
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3-2. RF
3-2-1. EGSM RX
NORMAL CONDITION
catch the channel?
No
CHECK
ANT402
,
R424
contact?
Yes
CPL400 Check
Pin1
≥
-65dBm ?
Yes
No
C413
,
RFS400
resolder or change
CPL400 Check
Pin10, 9
≥
-65dBm ?
Yes
No
CPL400
resolder or change
U401 Check
Pin6, 7
≥
-65dBm ?
Yes
No
C422
,
C423
,
L407
resolder or change
U401 Check
Pin1, 31, 48 : 2.8V ?
Yes
No
U100
pin
J3,J4,K3,K4
resolder or change
U401 Check
Pin35 : 26Mhz?
Vp-p : 950mV?
Yes
No
TCX400
resolder or change
U401 Check
Pin24, 25, 26, 27
Vp-p : 120mV?
Yes
No
U401
resolder or change
U100
CHECK!!
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⑧
⑦
⑥
⑤
④
③
②