Re: JVC DR MV1B , DVD/VCR recorder

N Cook <diverse8@xxxxxxxxx> wrote in message
news:etsb5h$gee$1@xxxxxxxxxxxxxxxxxx
Not my usual area but willing to at least look at it despite inglorious
reputation googling about.
Owner was prepared to live with having to press on/off ten times from cold
before it would settle into on/standby but now there is a sound problem.
After 2 days powered up all audio functions gradually fail to white noise,
ie play anything , record anything VCR or DVD or off-air.
I've located 2 SIL, LA.... (closely surrounded in tiny lytics so cannot
read) in area of board marked Audio In/Out , any suggestions. ?
I get the impression it was on left and right so trace power line back to
ps
and selectively heat to induce problem.?

--
General electronic repairs, most things repaired, other than TVs and PCs
http://www.divdev.fsnet.co.uk/repairs.htm

Diverse Devices, Southampton, England



Its a dual tuner jobby so worth cobbling something together
I've now read the numbers on this JVC DR MV1 audio SILs as LA7151 and
downloaded the pdf, they are dual amps so maybe just a problem with one
pack, but I'll trace back to the ps anyway.
There is certainly browning of the pcb around the ps primary side driver?
STR G6653? and browning to a lesser extent on the heatsink/pcb mounting
areas, despite a reasonable size heatsink. The owner actually suggested
putting in another or bigger fan. I will try and find what a Sharp PQ5EV3 is
also in the ps

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/




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