I am looking for suggestions as to where to begin on servicing this
receiver.It powers up for a short period.5 seconds or so, enough to initiate
a system's test of sorts then powers down to a standby mode. Any help would
be appreciated.

David Lalonde wrote:
I am looking for suggestions as to where to begin on servicing this
receiver.It powers up for a short period.5 seconds or so, enough to
initiate a system's test of sorts then powers down to a standby mode.
Any help would be appreciated.


Are you a technician?

Mark Z.

"Mark D. Zacharias" wrote in message
. com...
David Lalonde wrote:
I am looking for suggestions as to where to begin on servicing this
receiver.It powers up for a short period.5 seconds or so, enough to
initiate a system's test of sorts then powers down to a standby mode.
Any help would be appreciated.


Are you a technician?

Mark Z.

First place to look is for open fuses. Next, does a relay click, and then
the unit depowers ? If so, primary of main ( not standby ) power transformer
may be open. It's quite common for primaries to fail open on Denons of
various models. Fault monitoring circuitry checks rails after main power
relay closes, and if any ( or all ) are missing, unit drops back to standby.
Failing this, it's going into output protect. As Mark says, you might
struggle, particularly with a Denon, if you are not an experienced engineer.
They are not the most fix-friendly of designs ...

Arfa

Thanks for this Guy's
Fuses are alright, Relay is also ok, I guess I will begin at main power
trans as you suggest.

Dave


"Arfa Daily" wrote in message
...

"Mark D. Zacharias" wrote in message
. com...
David Lalonde wrote:
I am looking for suggestions as to where to begin on servicing this
receiver.It powers up for a short period.5 seconds or so, enough to
initiate a system's test of sorts then powers down to a standby mode.
Any help would be appreciated.


Are you a technician?

Mark Z.

First place to look is for open fuses. Next, does a relay click, and then
the unit depowers ? If so, primary of main ( not standby ) power
transformer may be open. It's quite common for primaries to fail open on
Denons of various models. Fault monitoring circuitry checks rails after
main power relay closes, and if any ( or all ) are missing, unit drops
back to standby. Failing this, it's going into output protect. As Mark
says, you might struggle, particularly with a Denon, if you are not an
experienced engineer. They are not the most fix-friendly of designs ...

Arfa

"David Lalonde" wrote in message
...
Thanks for this Guy's
Fuses are alright, Relay is also ok, I guess I will begin at main power
trans as you suggest.

Dave


I'd be happy to help with a couple more suggestions if I knew you could
solder, read a schematic, etc.

Mark Z.

I will welcome any sugesstions you care to offer.Schematics are not an issue
!

Thanks
Dave


"Mark D. Zacharias" wrote in message
. net...
"David Lalonde" wrote in message
...
Thanks for this Guy's
Fuses are alright, Relay is also ok, I guess I will begin at main power
trans as you suggest.

Dave


I'd be happy to help with a couple more suggestions if I knew you could
solder, read a schematic, etc.

Mark Z.

David Lalonde wrote:
I will welcome any sugesstions you care to offer.Schematics are not
an issue !

Thanks
Dave


"Mark D. Zacharias" wrote in message
. net...
"David Lalonde" wrote in message
...
Thanks for this Guy's
Fuses are alright, Relay is also ok, I guess I will begin at main
power trans as you suggest.

Dave


I'd be happy to help with a couple more suggestions if I knew you
could solder, read a schematic, etc.

Mark Z.

Look for bad 1 ohm resistors in the regulated power supply. They should be
changed to 0.22 ohm 1 watt flameproof.

Mark Z.