4. TROUBLE SHOOTING
- 84 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
SETTING : After initialize Agilent 8960, set the speech option at loopback.
START
Check the TP2
Signal While talking to mic
Change the microphone
( TP3, MIC200)
No
Make a phone call,
then check TP1 mic bias
Check mic bias signal line
No
Yes
Yes
Microphone will work properly.
Check microphone sound hole
C263
39p
R286
1K
VA206
VA207
L201
100n
L202
100n
R220
100
100
R222
MIC200
2
1
R21
6
1K
2
1
VMIC_BIAS_P
47p
C229
1
2
R223
2.2K
2
1
2.2K
R218
2
1
C230
0.1u
2
1
C232
DNI
0.1u
C228
C231
DNI
10u
C222
1
2
MIC_P
MIC_N
Changed (12/28)
11/5 Changed to 39pF
11/5 Added 1k
BB side place
MIC side place
Changed (7/26)
Added (7/26)
(7/2)
TP2
TP1
TP3