HI JR

Thanks for the comment

It seems as if the motor is electrically isolated from chassis. Inside
the nice metal screening can is a plastic-bodied motor, which connects
to the regulator pcb - both terminals of which are wired but not
directly connected to ground.

Anyway - (at the moment) it would appear to be working (after the
disassembly, clean - reassembly process described in this thread - so
- fingers crossed - I shall not need to go looking for a replacement
just yet...

Thanks for the warning !

Adrian
Suffolk UK


On Thu, 24 Feb 2005 22:20:21 -0800, JR NORTH
wrote:

Be careful to check if the motor is shielded, or chassis grounded.
Failure to do this caused me to blow a Technics M205 decks board when I
replaced the motor with an otherwise correct replacement.
JR

Adrian Brentnall wrote:

Hi All
My old (1980's) Marantz SD230 cassette deck 'died',,,,, suddenly !.
Symptoms - lights on - but no reponse to the 'play' button.

A quick check of the voltages shows that 'something' appears to be
pulling more current than it should, puling the main DC rail down from
19V to about 6V.

Disconnecting the multi-way connector that drives connects to the
drive motor and the play / record / pause switches restores the DC
rail to nominal.

12V dc applied direct to the motor results in a current of about 400mA
- but no rotation. Is it a fair assumption that the motor's at fault ?

If so - anybody know where I could find a replacement - motor is
marked MMI-6A2LK - or is it one of those things that won't be
economical to source / repair ?

Thanks in advance
Adrian
Suffolk UK
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