LG -A290 Service Manual page 105

Ear jack condition
Is the condition good?
Check condition of
Is the condition good?
Check U101 Circuit
LGE Internal Use Only
START
Check of
Yes
Filter Circuit
(L00, C0)
Yes
(VBAT_AMP)
No
Check Trouble Shooting
4.11 Ear mic
Give the additory
No
solder in
L00, C0
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4. TROUBLE SHOOTING
Only for training and service purposes