LG KF700Q Service Manual page 81

4. TROUBLE SHOOTING
4.7.3 Loud speaker path (voice speaker phone/VT)
Loud speaker path as below:
MSM6280 SPK_R, SPK_L
U501(Speaker/Receiver Selection Switch)
CN102(LCD FPCB to Main PCB Connector)
C508,C509 ?
CN301 33,34
LGE Internal Use Only
→ →
C508,C509 R507,R508
→
CN301(Main PCB to LCD FPCB connector)
→
TP100, TP101(SPK PAD)
- 82 -
→
U504(SPEAKER AMP)
→
Speaker
U504/ U501
CN102 33,34
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Only for training and service purposes
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