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SGH-D800 Flow Chart of Troubleshooting
2-
21
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2-2-2. DCS RX
NORMAL CONDITION
catch the channel?
No
CHECK
ANT401
,
R406
contact?
Yes
F400 Check
Pin1
≥
-65dBm ?
No
C418
,
CN400
resolder or change
Yes
F400 Check
Pin12, 13
≥
-65dBm ?
No
F400
resolder or change
Yes
U403 Check
Pin4, 5
≥
-65dBm ?
No
C426
,
C427
,
L403
resolder or change
Yes
U403
Pin1, 31, 48 : 2.9V ?
Yes
No
U101
pin
A13
,
B10
,
C113
,
C115
resolder or change
U403 Check
Pin35 : 26Mhz?
Vp-p : 950mV?
No
OSC400
resolder or change
Yes
U403 Check
Pin25, 26, 27, 28
Vp-p : 120mV?
No
U403
resolder or change
Yes
U101
CHECK!!
Содержание SGH-D800
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Страница 49: ...SGH D800 Block Diagrams 6 2 ...