Hey HP experts and enthusiasts

From: Joe <rigdonj_at_intellistar.net>
Date: Mon Jul 13 10:01:18 1998

At 10:39 PM 7/12/98 -0700, you wrote:
>Russ Blakeman <rhblake_at_bbtel.com> writes:
>> I have two box type units labeled as an HP9123D that appear to have two
>> 3.5" type removable (floppy?) drives in each, with an HPIB bus connector
>> and a cable with a 5 pin DIN on the end. It also states that it's for
>> use only with the HP45849A.
>
>Hmm, is that the p/n for a Touchscreen II aka HP150 with 12-inch
>display? I know those have the 5-pin DIN connector inside and the
>9123 would be contemporary, can't remember if the ones we had at
>University of Maryland hooked up that way or not though.
>
>-Frank McConnell

  Yeap, they're for the TS II (Touch Screen II). That's the only machine
that they'll work on. The 9123 is exactly the same as a 9122 except it
doesn't have a power supply. The DIN plug is to supply power to the drives.
BUT you can add an external power supply and then you can use them just
like regular HP 9122 drives.

     BTW ******BIG WARNING****** I have found that the double sided
drives like those used in the 9122, 9122, 9133, etc are prone to hanging up
and not raising the discs completely when you try to eject a disc. If you
force the disc out or insert a disc, you will almost certainly rip the top
head off the drive. The problem is caused by the grease that was used on
the drive machanism, it gets dry and gummy with age and binds the
mechanism. When you use those drives, watch and be certain that the drive
opens completely before removing or inserting a disk.

  Joe
>
Received on Mon Jul 13 1998 - 10:01:18 BST