Re: Pioneer sx-727 radio dead

I have left the case open, and have the thing sitting on a shelf
vertically.
It worked flawlessly for about 3 days, then spontaneouslt the radio
went dead again.
I ever so gently tapped the heatsink that this transistor is on, and
once
again everything is fine. I have not lifted the board yet to look at
the solder
underneath. However I'm beginning to think that it is the transistor
itself
that is the problem. Can I find the exact replacement at radio shack?
If I'm going to lift the board, I'm thinking it's probably makes sense
to replace the
device.

Thanks

On Apr 29, 2:32 am, "JANA" <j...@xxxxxxxxxxxxxxxxxx> wrote:
I strongly suggest you find and fix the cold solder connection that
caused the fault. Or if the transistor is intermittant, replace it.

--

JANA
_____

<tx7...@xxxxxxxxx> wrote in message

news:a60fee7d-739c-427d-bf6c-301464aa4ceb@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
OK I took the thing apart and sure enough, there was a sanyo 313E
mounted on a V shaped piece of metal(heatsink?). When I tapped
gently on the metal, everything now works fine.
The small board in question is AWR-011A, which according
to the schematic is the power supply unit.
I would think that if this was the roblem it would effect
everything, not just theradio.
Anyway I will run it for awhile with the case open,
and see if the problem recurs.

On Apr 26, 11:50 am, "Bob Shuman" <no_spam_...@xxxxxxxxxxxxx> wrote:



Sounds like something is intermittent in theradiosection (assumes
amplifier/auxiliary input/tape/etc. all are still working fine). I'd
start
by looking for cold/broken solder connections under a magnifying. Or
alternatively, if that does not work and you can get at the board
safely
while the unit is powered up, you can try pushing at various points
with a
wooden dowel or similar non-conductive item. This may help you isolate
the
area to take a closer look.

If these do not help, then you'll either need a schematic, a volt
meter,
scope, and some troubleshooting skills to check the power supply
voltages at
key points and then follow the signal through theradiosection or
take it
to someone to do the work for you.

Bob

<tx7...@xxxxxxxxx> wrote in message

news:facbbdcd-1b25-4648-a91b-6c409b7924d8@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

I have apioneersx-727receiver, I'm the original owner (33 years).
Recently theradiostopped working.
Everything else works great.
FM, AM no difference does NOT work.
The tuning meter does not move as I turn the tuning dial.
If I turn the volume up, I can hear some static thru the speakers.
Occasionally theradiowill spontaneously work for a while,
and then return to this dead mode.
All the other inputs cd, turntable work fine.
Any ideas what the problem might be?
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