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4. TROUBLE SHOOTING
4.15.3 Sound path for headset
Multimedia Sound path for Head_Set as below:
STN8810(msptxd0) → U202(audio codec) → C242,C244 → #4,#5 pin of CN202 headset Jack
CN202
CN202
21
19
1
2
3
FB503
1000
4
5
6
7
8
FB245
9
10
11
12
13
LGE Internal Use Only
Start
Connect the phone to network
Equipment and setup call
Setup 1KHz tone out
And insert head_Set
Headset insertion detection
in the Main LCD Display OK?
YES
The sine wave appear at
C242,C244 ?
YES
Can you hear the tone?
YES
END
C242, C244
R222
68
C242
33u
R223
68
C244
1608
- 132 -
NO
Check #8 pin of CN202
or change the Main b'd
Check the U202
or change the Main b'd
NO
Check the CN202
or change the Main b'd
100K R219
33u
U205
1
2
IN
OUT
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
C240
1u
WM_MIC2N
C241
1u
WM_MIC2P
WM_LOUT1
WM_ROUT1
USB_D+
USB_D-
EAR_SENSE_N
VBATT
REMOTE_PWR_ON
+5V_PWR
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