On Wed, 31 May 2006 04:06:37 +0100, Mikey
wrote:


Hi, I have a 730 receiver with the controls of the front panel a little
crazy at the begining, have to wait for 5 minutes to normalize. Can you
help me with the origin of this problem?
Thanks in advance for any help.
Mikey.


Stephen Sank Wrote:
The 120V version of the 730 has a primary power switch on the back, but
the 120/240V version
does not. Not sure about the 220V version. The main power switch is
the touch-sensor button
on the front, which is powered by a small transformer/supply that's
always on(unless the rear
switch is off, on the 120v version at least). For this reason, it is
not possible to bring it
up on a variac, but I would not even consider that necessary. Other
than occassional minor
issues with the low voltage power supply(+/-15V for preamp & tuner),
their pretty damned
reliable. Just be prepared to replaced dozens of tiny lamps(14v/40mA)
in the front panel,
which are a bit challenging to get to.
The 730 is one of my favorite receivers in the world.

--
Stephen Sank, Owner & Ribbon Mic Restorer
Talking Dog Transducer Company
http://stephensank.com
5517 Carmelita Drive N.E.
Albuquerque, New Mexico [87111]
505-332-0336
Auth. Nakamichi & McIntosh servicer
Payments preferred through Paypal.com
"N Cook" wrote in message
...-
Incredably neavy lump. Unused for years and unknown history and mains
lead
is mildewed so
I wanted to insppect innards first and then power up on a variac.
Eventually twigged how to remove the top cover. Innards perfectly
clean and
healthy looking.
But now stumped - where on earth is the on/off switch ?

electronic hints and repair briefs , schematics/manuals list on
http://homepages.tcp.co.uk/~diverse



-
Look for faulty electrolytic capacitors in the power supply. Chuck