Forum > LCD TV forum

Sharp LC-40F22E 17MB61-2 Sound problem

(1/2) > >>

Turnip:
Hi folks,

Got one of these in where set is OK for a while, then sound slowly distorts to something like a Dalek. Note the sound chip appears one of those horribly small ones.

Any thoughts - Thanks - Chris.

jordan:
Replace 4 SMD capacitors (0,47uF) on audio input (RINP,RINN,LINP,LINN) with new 1uF capacitors

Turnip:
Hi Jordan and thanks,

Will go look for those caps - I gave the chip (MAX9736A) a squirt of freezer, and sound was again normal. Don't suppose anyone has a shematic  - Bit doubtful that I could manage change it though, as it doesn't seem to have extended pins and the area is congested.

Impressed though with something that can deliver 30 or so class D watts and is the size of a flea's whatsit.

Thanks again - Chris.

downunder:
Hey Turnip, time to call The Doctor !! Any chance to heatsink it...some quite nifty glues out there these days, or perhaps try one of them rubber thingies ....heat transfer pads. Else it's the main board and a big
hit to your bank account.

Turnip:
Thanks Bruce,

Chip doesn't actually run hot when sound is distorted, so think a panel the answer - Noticed some on the Flea.

Thanks again - Chris.

Later - Discovered ChasHyde has a repair kit with Jordon's 4 caps and U168 chip. Caps so small they send 8 should you lose some. Had a look at shematic and attach a piccy outlining suspect caps C1075/6/7/8

Navigation

[0] Message Index

[#] Next page