Samsung SGH-D800 Service Manual page 23

2-2. RF
2-2-1. EGSM RX
NORMAL CONDITION
catch the channel?
Pin1 ≥ -65dBm ?
Pin10, 11 ≥ -65dBm ?
Pin6, 7 ≥ -65dBm ?
Pin1, 31, 48 : 2.9V ?
Pin35 : 26Mhz?
Vp-p : 950mV?
Pin25, 26, 27, 28
Vp-p : 120mV?
U101
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Yes
F400 Check
Yes
F400 Check
Yes
U403 Check
Yes
U403 Check
Yes
U403 Check
Yes
U403 Check
Yes
CHECK!!
SAMSUNG Proprietary-Contents may change without notice
SGH-D800 Flow Chart of Troubleshooting
No
CHECK
ANT401, R406
No
C418, CN400
resolder or change
No
F400
resolder or change
No
C428, C433,
resolder or change
No
U101 pin A13, B10, C113,
resolder or change
No
OSC400
resolder or change
No
U403
resolder or change
2-19
contact?
L404
C115