On Mon, 8 Mar 1999, Robert Stoneham (EUS) wrote:

> Oldsmobile G-Body Mailing List - http://cyberglyphs.com/gbody/
>
> For those of you all out there that have the high-end UX1 or UU8 factory
> stereo systems (Blaupunkt tape mechanism) and are experiencing the
> ever-popular reversing problems, here is the cure for those willing to do
> the job themselves:
>
> Delco part #    1226616 "light barrier" (3 wire IR transceiver located in
> middle of
>                               mechanism, soldering required)  about $16.00
>               1226632 "pulse generator disk" about $3.00
>               1226627 "pressure angle pack" (set of 2 pinch rollers)
> $12.00
>       1226670 "belt package" about $6.00
>
> To me, all of these make up a complete repair kit.  First, clean the
> pulleys, head, tape guides, and capstans using head cleaner or alcohol and
> then install the above items. Fire the unit up on the bench using a wiring
> harness from a junkyard, two speakers, and a 12VDC power supply (an old PC
> power supply works good - use black and orange wires for 12VDC).  Check
its
> operation and adjust the head, if high frequencies suffer. Reassemble and
> reinstall the unit.  You should not have problems with it for many years
> down the road.  The belts and pinch rollers are not mandatory items if the
> ones in your unit are new and good (clean, soft, pliable and NO cracks.)
> The light barriers go weak over the years, as they remain energized even
> without playing a tape. This is the 95% cause of the reversing problem, as
I
> noticed a night and day difference on the oscilloscope between the bad and
> good parts on all three units I repaired Friday.
> I still have a couple of UM6 models to repair, so I will see what goes
wrong
> with these types, also.   If anyone needs more assistance, feel free to
> e-mail me privately.  Good luck!
>
> Robert Stoneham
> 86 CS - 307, 200-4R (Pristine)
> 78 Ford - (Old Faithful)
> 99 Saab 9-3 - (My Sweethearts)
> robert.stoneham@ericsson.com <mailto:robert.stoneham@ericsson.com>
>