In , on 07/23/03
at 05:30 AM, "Trevor Wilson" said:


"John Fryatt" wrote in message
...
Hi,

I have got out my old Nakamichi 480Z cassette deck, and am testing it. It
generally works fine, and is in great condition, but there is one problem.
When I rewind a tape and then press play, it won't work. The machine seems
to attempt to start the tape moving but then just stops. If I try pressing
stop then start several times, occasionally it will go. Mostly though, I
need to open the cassette door then close it again. This causes the slack
to
be taken up and the tape to be wound on just a fraction, and then the tape
will play with no problem.

**Most likely cause is the assist belt. When you lift the lid, you
will see a large gear. The belt which drives the gear is probably worn
and requires replacement. The mechanism should be correctly aligned,
after this service, but it will probably work without the alignment.
The T/U idler may also require replacement, but this problem usually
manifests itself during play.


Any ideas? Is this something I could attend to myself?

**I have no idea if you can attend to it yourself.

At this point, replace *ALL* of the belts and thoroughly clean the reel
drive idler wheel using a rubber "restorer". If you have a torque
gauge, I think you'll find that the reel take-up torque in one or both
directions is too low.

Unless you are a complete clutz, the above procedures will not
significantly shift the alignment.

Note that this series of transport is quite different from
run-of-the-mill cassette decks. While minimally equipped, bright people
can often accomplish a reasonable alignment on a run-of-the-mill deck,
those seat-of-the-pants techniques will not work on this series. Unless
you or your expert friends or professional server can trace their
training back to Nakamichi *AND* they have the factory jigs, don't
touch the alignment. These decks are very stable and don't ususlly need
alignment unless you replace something on the head bridge or some
backyard "expert" has been messing with it. If one is careful, the
belts and pressure rollers can be replace without changing the
alignment (but I always check the alignment anyway).

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