4.2.2.1 Mobile Switch & PAM & FEM Circuit
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4. Trouble Shooting
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Re-download SW & CAL
FEM
Check Control Signal
C422, C424
Mobile Switch
SW401 between C413
and C421 Is short?
Replace SW400
Check U401
YES
YES
NO
NO
Check R403, R404 RF LEVEL
≥
0dBm
Check U402
YES
NO
<GSM850>
<PCS1900>
TX
TX
LB_HB
TX_ANT_SW_EN
U402
SW400
U400
U401
FL400
U403
X400
<GSM850>
<PCS1900>
Содержание KM710
Страница 1: ...Date May 2008 Issue 1 0 Service Manual Model KM710c Service Manual KM710c Internal Use Only ...
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Страница 129: ... 130 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ...
Страница 139: ... 140 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ...
Страница 173: ...Note ...
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