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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
4.11.3 Loud speaker path (voice speaker phone)
Loud speaker path as below:
ESM6270 SPK_R, SPK_L
→
C532,C541
→
R510,R516
→
C533,C542
→
R511,R517
→
U502(audio
codec)
→
FB500,FB501
→
CN603(B°ØtoB connector)
→
OUT800, OUT801 (SPK PAD)
→
Speaker
Start
The sine wave appear at
C532,C541?
Chang e th e Main bo ard
NO
Conne ct th e phone to netw ork
Equipm ent a nd setup call
Setup 1KHz tone out
Set phon e with sp eaker phone mode
The sine wave appear at
FB500, FB501?
YES
Check t he U502 or
Chang e th e Main bo ard
NO
Check t he CN603
NO
YES
YES
Can you hea r th e ton e?
Chang e th e sp eaker
NO
YES
END
The sine wave appear at
pads o f speaker ?
Summary of Contents for KE990 - Viewty Cell Phone 100 MB
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