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11-2. RF
11-2-1. GSM850/EGSM RX
NORMAL CONDITION
catch the channel?
DUF400 Check
Pin1 ≥ -65dBm ?
DUF400 Check
Pin10, 11 ≥ -65dBm ?
Pin6, 7 ≥ -65dBm ?
Pin1, 31, 48 : 2.9V ?
Pin35 : 26Mhz?
Vp-p : 950mV?
Pin25, 26, 27, 28
Vp-p : 120mV?
⑧
U101
This Document can not be used without Samsung's authorization
Yes
Yes
Yes
U405 Check
Yes
U405 Check
Yes
U405 Check
Yes
U405 Check
Yes
CHECK!!
SAMSUNG Proprietary-Contents may change without notice
①
No
CHECK
ANT401,
R405
②
No
C421,
RFS400
resolder or change
③
No
DUF400
resolder or change
④
No
C431, C436,
resolder or change
⑤
No
U101
pin A13, B10, C112,
resolder or change
⑥
No
TCX400
resolder or change
⑦
No
U405
resolder or change
11-21
Flow Chart of Troubleshooting
contact?
L406
C114
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