LG KF690 Service Manual page 71

4. TROUBLE SHOOTING
4.7.2 Voice path for headset
Voice path for Head_Set as below:
ESM6270 HPH_R, HPH_L
#4, #5 pin of CN400 headset Jack.
LGE Internal Use Only
→ →
C416,C417 R401,R402
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→ →
FL400(EMI Filter) FB402, FB403
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