Volume motor problem was due to a broken trace at the solder point
of pin 1 of CN-19 the orange bunch of wires to the Tuner pcb,
now the radio prob

"N Cook" wrote in message
...

"Stephen Sank" wrote in message
...
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







I've fully powered up now
Yes at least 6 bulbs blown
Problem with no powered control of volume although it did fire up randomly
when I wasn't looking.
Also maybe no radio o/p as manually changing volume setting plenty
of audio o/p on aux under volume control but no radio throughput.
on FM function select
The tuner motor system works fine up/down or presets
I assume the 6V battery keeps the 4066s happy with I/P and function
and tuner selects stored.