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Level 3 Repair
8-19
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8-3-1-8. Stereo Headset Part
Stereo headset does not work
Earset detection
working?
Yes
No
Yes
Earset Button
working?
Check L312, U300, related circuit (Crack,
open, etc) & Resolder L312, U300
No
Check L300, R300 (Crack, open, etc) &
Resolder L300, R300
Check the S/W setting
(volume, mute, etc)
Yes
Earset MIC
working?
No
Check L300, R301 (Crack, open, etc) &
Resolder L300, R301
Yes
Earset Speaker
working?
No
Check L301, L302, R302, R303, R346
(Crack, open, etc) & Resolder L301, L302,
R302, R303, R346