On Mon, 11 May 2009 13:37:28 -0700 (PDT), Paul
put finger to keyboard and composed:

Just wondering if any sci.electronics.repair gurus have experience
with Sony's RPTV KP48V85. (KP-53V85 and KP-61V85 are same chassis #
SCC-P43GA.)

AFAICT, the main chassis number appears to be RA-3A.

Symptoms are no sound and no picture. Any help is
appreciated. Please reply to this newsgroup. TIA

It's not much but ...

Here is a troubleshooting guide for the RA-3A chassis:
http://www.justanswer.com/uploads/mi...2640-TVP14.pdf

See page 23 for model-to-chassis cross references.

This is an engineering change note:
http://esi.sony.ca/esupport/esupport.../996541491.pdf

- Franc Zabkar
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