LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 113 -
4.19 Headset microphone
Headset
→
C106
→
MIC2P(MSM6275)
Start
EAR_SENSE_N
(R109) is 0V?
Yes
END
Make a call
Change the headset or
SUB board and retry.
VREG_MSMP is biased
by 2.6V? (R100)
Change the Main B’d
Yes
OK
NO
NO
NO
Change the headset and retry
YES
Change MAIN board
NO
Sine wave appears at
C106 ?
Change the headset or
SUB board and retry.
NO
Yes
Содержание TU550
Страница 1: ...Date May 2007 Issue 1 0 Service Manual Model TU550 Service Manual TU550 Internal Use Only ...
Страница 151: ... 152 LGE Internal Use Only Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes ...
Страница 161: ... 162 LGE Internal Use Only Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes ...
Страница 185: ...Note ...
Страница 186: ...Note ...