Amp powers up, but no output.
 

Eltax avr 250
Please can somebody reply? somebody must have an idea about what the problem
could be. Eltax.com was no help, just told me it was possibly defective.
DUH.

its just gone dead, lights up !! one of the speaker level indicators is on
max tried resetting but no good, had an electrical engineer friend look at
it, he checked fuses. Couldn`t see anything obvious. Checked all the speaker
wiring too. Any ideas about the problem? Saw another post the same as this,
but the guy just bought a new amp.

"B A T M A N" wrote in message
...
Eltax avr 250
Please can somebody reply? somebody must have an idea about what the
problem
could be. Eltax.com was no help, just told me it was possibly defective.
DUH.

its just gone dead, lights up !! one of the speaker level indicators is on
max tried resetting but no good, had an electrical engineer friend look at
it, he checked fuses. Couldn`t see anything obvious. Checked all the
speaker
wiring too. Any ideas about the problem? Saw another post the same as
this,
but the guy just bought a new amp.


Check speakers on a different amp. If they are ok:
A likely cause is fried (shorted) output transistors. When the outputs go
south, the speaker protection circuit kicks in and mutes all output (i.e.
disconnects power to the speakers) to spare the speaker coils from seeing
DC. This is why you will not get sound from either channel. Fuses don't
always blow in this scenario. Often, outputs will fail internally with no
visible signs of damage such as chunks blown out the sides of the
transistors or flame damage, etc.

This is not a job for the novice. Multiple driver stage trannies (in the
chain before the final outputs) are also frequently toast. One school of
thought is that even the ones that aren't toast have been stressed by the
catastrophic failure and should be replaced as a precaution -- you wouldn't
want the new outputs to fail again prematurely because you neglected to
replace a 20-cent transistor.

Unless you're aware of the hazards of working around high-current devices
AND don't mind risking even more damage to the amp, take it to a shop.
Or... contribute to the landfill like the other guy you read about.

Ray L. Volts wrote:
"B A T M A N" wrote in message
...
Eltax avr 250
Please can somebody reply? somebody must have an idea about what the
problem
could be. Eltax.com was no help, just told me it was possibly
defective. DUH.

its just gone dead, lights up !! one of the speaker level indicators
is on max tried resetting but no good, had an electrical engineer
friend look at it, he checked fuses. Couldn`t see anything obvious.
Checked all the speaker
wiring too. Any ideas about the problem? Saw another post the same as
this,
but the guy just bought a new amp.


Check speakers on a different amp. If they are ok:
A likely cause is fried (shorted) output transistors. When the
outputs go south, the speaker protection circuit kicks in and mutes
all output (i.e. disconnects power to the speakers) to spare the
speaker coils from seeing DC. This is why you will not get sound
from either channel. Fuses don't always blow in this scenario.
Often, outputs will fail internally with no visible signs of damage
such as chunks blown out the sides of the transistors or flame
damage, etc.

This is not a job for the novice. Multiple driver stage trannies (in
the chain before the final outputs) are also frequently toast. One
school of thought is that even the ones that aren't toast have been
stressed by the catastrophic failure and should be replaced as a
precaution -- you wouldn't want the new outputs to fail again
prematurely because you neglected to replace a 20-cent transistor.

Unless you're aware of the hazards of working around high-current
devices AND don't mind risking even more damage to the amp, take it
to a shop. Or... contribute to the landfill like the other guy you
read about.

Thanks, it does look like "A likely cause is fried (shorted) output
transistors. When the
outputs go south" the fuses are fine, but there was a transistor that had
what looked like the plastic melted on it, just before the mains output, but
without a service manual, my electrical engineer friend, could not be sure.
I live nowhere near any expert shops, but yesterday I managed to get hold of
a telephone number of a professional engineer who works from home, not too
far away, for a number of shops.