17 Jun
2005
17 Jun
'05
5:12 p.m.
I'm trying to repair the tape drive in an HP 9825. The roller has melted
(no surprise there). It seems like I could just get a bit of silicon
No suprise at all. All HP rollers do this in the end... I've got a 9845B
on the bench at the moment, and both internal tape drives need new rollers.
tubing or something that has the same diameter and
guage as the existing
roller.
Indeed you can.
The other solution is to use an O-ring, put into a groove on the metal
hub. IIRC, the 9825 tape drive (same mechanism as in the 9815, 9831,
9835, 9845, 9877, etc) has a somewhat complicated hub, carrying the
tachometer disk at the lower end, so it's not going to be easy to either
make a replacement or machine the groove in the existing hub..
I know this has been discussed before but I can't
find any specific
messages (by the way, the CC archive search is broken, Jay). Can anyone
Another place to look is on the MoHPC forum (http://www.hpmuseum.org/,
and follow the obvious links, or do a google search with
site:www.hpmuseum.org). This problem has certainly been discussed there.
provide any tips or guidance so I don't have to
re-learn mistakes already
made?
Any tips for cleaning off the existing material? Isopropyl alcohol? Any
Yes. That generally shifts it.
thoughts of using heatshrink tubing and applying
multiple layers until it
has the same thickness as the original roller?
That has certainly been done. Either by someone here, or by someone on MoHPC.
Thanks for any help. This will be a candidate for adding to the knowledge
base once I've successfully replaced the roller.
Would you be interested in the instructions for doing this (properly!) on
a 9810/9820 magnetic card reader? If so, I'll post/e-mail them to you.
-tony