Speed/pitch adjustment in Nakamichi 582Z cassette deck

Archived from groups: rec.audio.pro (More info?)

Does anyone have a service manual handy for the Nakamichi 582Z cassette
deck, or know for sure where the speed/pitch servo adjustment would be
in this model? I've got an otherwise functioning deck which is running
about 1% fast; the pitch discrepancy is unacceptable for musicians,
including me.

--best regards

Archived from groups: rec.audio.pro (More info?)

On 5 Sep 2005 06:29:44 -0700, "David Satz" <DSatz@msn.com> wrote:

>Does anyone have a service manual handy for the Nakamichi 582Z cassette
>deck, or know for sure where the speed/pitch servo adjustment would be
>in this model? I've got an otherwise functioning deck which is running
>about 1% fast; the pitch discrepancy is unacceptable for musicians,
>including me.

The speed trim is inside a rubber flap on the back of
the capstan motor. You'll need a small flat-blade
screwdriver, and if it's metal, you'll need to
remove it after making each small incremental
adjustment because it will affect speed.

Given its age, you might even want to get brave
and try to get a tiny drop of Cailube onto that pot,
maybe via the screwdriver.

How's our loading belt? The one that pulls the
head bridge up and down? Got a few spares left
for special people, just bounce me a USPS
address.

Good fortune,

Chris Hornbeck

Archived from groups: rec.audio.pro (More info?)

>I'd change the pinch roller first, though.
>

This wouln't affect the speed. In my opinion.

Archived from groups: rec.audio.pro (More info?)

On 6 Sep 2005 10:09:49 -0400, kludge@panix.com (Scott Dorsey) wrote:

>On a cassette deck, you can sometimes have speed problems before the
>flutter gets out of control, because the torque is so different on
>the two reels. If the capstan isn't tight, the tape will run slow
>for the first half, then fast for the second half, since the reel motors
>are pulling the tape along somewhat and there is some slippage at the
>capstan.
>
>This is why servo control of reel motors is such a big deal.

The Nak's have a related issue because they tension the
tape by the differential between supply-side and takeup-side
tensions. Both capstans are driven by the same belt, and
both belt and pinch rollers are important to getting
everything to work optimally.

Because of David's decades of good works, he was blessed
by Zeus or some other god in *this* life, so rarely seen
in the contemporary world, and allowed to get all fresh
rubber parts at exactly the last possible moment.

Never discount divine intervention, 's what i say.

Thanks, as always,

Chris Hornbeck