SAnyo DS19130, CH# 19130-00 Audio problem

Set came in no sound. Couldnt see any audio anywhere around the outputs,
Replaced IC101(LA7655N). Now at about half volume I do get a little audio,
but not loud enough.and if I go up over half volume it completely goes away.
Cant find any open res or bad caps(ESR). Dont have a schematic. Looks like
someone else has replaced the two output trans. Both are NTE373, and check
good with my fluke meter. NOW, I looked at the spec for nte 373 and it says
compl to nte374, so should maybe one of these be a 374?.
Thanks Charlie

 

[Robert McPherson]

<ceast@bellsouth.net> wrote in message news:<ajgoc.1152$yF6.116@bignews5.bellsouth.net>...

Set came in no sound. Couldnt see any audio anywhere around the outputs,
Replaced IC101(LA7655N). Now at about half volume I do get a little audio,
but not loud enough.and if I go up over half volume it completely goes away.
Cant find any open res or bad caps(ESR). Dont have a schematic. Looks like
someone else has replaced the two output trans. Both are NTE373, and check
good with my fluke meter. NOW, I looked at the spec for nte 373 and it says
compl to nte374, so should maybe one of these be a 374?.
Thanks Charlie

A lot of Sanyo Tvs that have sound problems have a defective sound
disciminator coil:

Q: Volume level fluctuates up & down. Sound could be brought in via
adjusting slug of T131.
However, adjustment range was narrow and degraded later.

A: Replace T131 Sound discriminator coil.
(ST 181 S 6HC)

Robert McPherson
rm502@bellsouth.net