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SGH-D800 Flow Chart of Troubleshooting
2-
19
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2-2. RF
2-2-1. EGSM RX
NORMAL CONDITION
catch the channel?
No
CHECK
ANT401
,
R406
contact?
Yes
F400 Check
Pin1
≥
-65dBm ?
Yes
No
C418
,
CN400
resolder or change
F400 Check
Pin10, 11
≥
-65dBm ?
Yes
No
F400
resolder or change
U403 Check
Pin6, 7
≥
-65dBm ?
Yes
No
C428
,
C433
,
L404
resolder or change
U403 Check
Pin1, 31, 48 : 2.9V ?
Yes
No
U101
pin
A13
,
B10
,
C113
,
C115
resolder or change
U403 Check
Pin35 : 26Mhz?
Vp-p : 950mV?
Yes
No
OSC400
resolder or change
U403 Check
Pin25, 26, 27, 28
Vp-p : 120mV?
Yes
No
U403
resolder or change
U101
CHECK!!
Summary of Contents for SGH-D800
Page 48: ...6 1 6 SGH D800 Block Diagrams ...
Page 49: ...SGH D800 Block Diagrams 6 2 ...