"Arfa Daily" wrote in message
...

"digdug" wrote in message
oups.com...

Mark D. Zacharias wrote:
digdug wrote:
Mark D. Zacharias wrote:
digdug wrote:
Thank you for the reply...

I don't think I was overly thorough in explaining what it does...
The whole unit doesn't power off, the sound just clicks on and off
but only when the signal is pumped out throught the Monitor
setting.
The system works fine throught the tuner side...as well as through
the CD player is fine.

Thanx again.

You press the "monitor" button and the speaker relay cuts off?

If so, this is a DC shift through the circuit, maybe a bad switch
IC.

Mark Z.

Yes, while in "monitor" mode to listen to movies or tv the sound will
intermitently cut in and out....but it does not while in "tuner" or
"cd" mode.

Doug C.


Is it a mechanical pushbutton (push in, push out) or a soft-touch
"tact-switch" ?

If it's a mechanical switch, the contacts could just be cutting out.

Mark Z.

it is a soft touch style switch....but I'm thinking that it must
control a switch of sorts inside the unit.....because I can hear it
click when the sound goes on and off.

Doug


To go back to the start. The click you are hearing is probably the output
protect relay, which is not controlled as a result of operating any front
panel switches, per se. As has been suggested, a relay in this position
might drop in and out as a result of bad switch contacts, if it is a
mechanical switch. Such bad contacts can cause a small DC shift in the
early
stages of the amp, which becomes a big shift at the output, and is hence
detected by the circuit which drives this relay, as a fault. However, with
your selector switch being a tact type, this is an unlikely scenario for
this case.

If you normally get a quiet click from inside, when you operate this
switch,
then there may be a small signal relay in the path, and this may be
dropping
in and out for whatever reason, but if you hear a loud mechanical click
from
inside the unit when the problem occurs, then it is a power relay that is
opening and closing, not a small signal one. Either way, from the replies
that you have made to the various suggestions, I would guess that this
problem is going to turn out to be beyond your level of expertise, if it
is
indeed internal to the amp, so your best path would be to take it inro a
reputable repair shop.

Arfa


It won't be the speaker output relay cutting out as the protection circuit
in these trips the whole unit into standby should a fault occur.

I've occasionally seen dry joints on the regulators on these and that could
cause any number of problems.
Check the soldering on all the 3 pin regs bolted to the aluminium heatsinks.

Andrew