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Another 820-3330 Audio Issue...left channel headphones muffled.

S

SMMRepair

Member
Working on an 820-3330 that has a headphone issue; the left channel only is very muffled/restricted, as if it's not being boosted/amplified properly. It's at around 10% of normal proper volume. Right channel works great.

1. Already replaced jack.
2. Replaced U6201, as it had seen liquid.
3. Line between U6201 and C6300 was broken/burned, so repaired that.
4. Checked and replaced all diodes and filters on the left channel, no change.
5. Diode readings for L and R channels on J6700 (pins 1/3) are .608.

I've already replaced U6201 and continuity is fine from pins 38/40 to L6704 and L6706. L6704 and L6706 replaced just for the hell of it. Also replaced jack to be sure...so I'm totally and utterly lost at this point. I'm sure I'm missing something obvious, but I can't stand small audio issues like this. They always get the best of me.

Any help is appreciated.
 
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S

SMMRepair

Member
Internal speakers (left and right) work fine, not muffled at all. The only issue is the left headphone not having full volume--it does work, just very, very low volume (~10%). It's very similar to when an amp blows/fails, how you can still hear the volume, but it's super low. I hope that makes sense.
 
S

SMMRepair

Member
Thank you; I removed C6500 and there was no change. Left-channel headphones still extremely low-volumed. Any other ideas?

Thanks again for all help!
 
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