LG LG9200 Service Manual page 76

Earphone Trouble (6)
2. Sending P ath pr oble m
Set audio part of the test
equipment to the echo mode.
The vo lt age at R220
is 1.1V ~ 1.3V?
Yes
A fe w te ns or hundr eds
of mV o f sig nals at C227
are measu red ?
Yes
The ABB is out o f or der.
Change the board.
Reso ld er the
No
R220, R221.
No
The ABB is out o f or der.
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4. TROUBLE SHOOTING
No
The so ld erin g of C227,
R218, R212 is O K?
Yes
No
The solde ring of
J201 is OK?
Yes
No
The earphone is OK?
Yes
Change the board.
Reso ld er
the C227, R220, R221.
Reso ld er
the J201.
Change the
Earphone .