I just think i blew my amplifier (Luxman 55A).
The wire to the right speaker accidentially touched a water pipe (connecting
it to ground), while playing. It gave a loud scratching sound and now the
right channel is totally dead. Also the left channel sounds low and
sometimes very distorted (but sometimes less).

What went wrong? Should I open and see if something looks burned og should I
just throw it away?

By the way somthing makes me wonder.
When i found it in thrash not long ago, i took it home, opened it and saw
that it was not that dusty inside and the fuses were ok. I turned it on an
connected my cd-player. Than when i connected a speaker i heard a POP, and
both saw and smelled smoke. I opened it again and stangely i could not see
anyting burned or find anything that was hot. I tried it again, and it
sounded fine - except from dust in the pot-meters. So i cleaned these and
hooked it up with four speakers, cd, record player etc. When i turned it on
it went POP again, with smoke and all. But it still sounded fine. So i have
used it in my living room since then until today.
Is that not strange?

/Sune

If you take the amp to a service center, they can fix it for you. Most
likley the output transistors, and their drivers have to be replaced.
Chances are that the bias resistors will also have to be replaced as well.

I have no idea of the cost of the repair to your particular model, but it
should not be too expensive in relation to buying something of the
equivelent new Luxman amplifier.

I doubt you would be able to service this yourself. It will involve too much
for the non-experienced.


--

Jerry G.
=====


"Sune T. B. Nielsen" wrote in message
. ..
I just think i blew my amplifier (Luxman 55A).
The wire to the right speaker accidentially touched a water pipe
(connecting
it to ground), while playing. It gave a loud scratching sound and now the
right channel is totally dead. Also the left channel sounds low and
sometimes very distorted (but sometimes less).

What went wrong? Should I open and see if something looks burned og should
I
just throw it away?

By the way somthing makes me wonder.
When i found it in thrash not long ago, i took it home, opened it and saw
that it was not that dusty inside and the fuses were ok. I turned it on an
connected my cd-player. Than when i connected a speaker i heard a POP, and
both saw and smelled smoke. I opened it again and stangely i could not see
anyting burned or find anything that was hot. I tried it again, and it
sounded fine - except from dust in the pot-meters. So i cleaned these and
hooked it up with four speakers, cd, record player etc. When i turned it
on
it went POP again, with smoke and all. But it still sounded fine. So i
have
used it in my living room since then until today.
Is that not strange?

/Sune

Sune T. B. Nielsen wrote:
I just think i blew my amplifier (Luxman 55A).
The wire to the right speaker accidentially touched a water pipe (connecting
it to ground), while playing. It gave a loud scratching sound and now the
right channel is totally dead. Also the left channel sounds low and
sometimes very distorted (but sometimes less).

What went wrong? Should I open and see if something looks burned og should I
just throw it away?

By the way somthing makes me wonder.
When i found it in thrash not long ago, i took it home, opened it and saw
that it was not that dusty inside and the fuses were ok. I turned it on an
connected my cd-player. Than when i connected a speaker i heard a POP, and
both saw and smelled smoke. I opened it again and stangely i could not see
anyting burned or find anything that was hot. I tried it again, and it
sounded fine - except from dust in the pot-meters. So i cleaned these and
hooked it up with four speakers, cd, record player etc. When i turned it on
it went POP again, with smoke and all. But it still sounded fine. So i have
used it in my living room since then until today.
Is that not strange?

/Sune



About 30 years ago our neighbourhood Radio Shack was burned to the
ground in a large fire that also destroyed several other businesses.
While walking home from school one day I detoured through the wreckage
and discovered an amplifier with the knobs and cord burned off and the
case badly damaged. Took the thing home and cleaned it up and it fired
up with no problems at all. Still use it as an amp for the sound system
in my greenhouse.

Newfdog

On Sun, 03 Apr 2005 15:36:18 GMT, Newfdog
wrote:


About 30 years ago our neighbourhood Radio Shack was burned to the
ground in a large fire that also destroyed several other businesses.
While walking home from school one day I detoured through the wreckage
and discovered an amplifier with the knobs and cord burned off and the
case badly damaged. Took the thing home and cleaned it up and it fired
up with no problems at all. Still use it as an amp for the sound system
in my greenhouse.

Newfdog

In one of my previous jobs I serviced rented sound equipment.
Due to end of contract I received an amplifier that had serviced a
taylors shop.
The amp's PCB was covered with a thick layer of pins and needles that
-over the years- had fallen of the taylors table into the cooling grid
of the amp placed below said table. None of the pins managed to create
a short, the amp worked fine.

Another amp had been working for years in a greenhouse, also placed
strategically below a flower-pot-arranging table.
This time the PCB was covered in a fat layer of dirt, small weeds
actually growing amidst the electronic parts on the PCB.
Apart from a noisy volume potmeter, this amp worked OK as well.
(I guess plants really like music...)


--
- René