HP-97 repair questions (a lot of)

[Dave Frederickson]

(07-18-2016 07:25 AM)x34 Wrote:  But, easily predictable for 1979 item, there are two problems:

1. mag card reader, which I know how to repair.
2. printer does not advance paper properly - guess, feed mechanism should be fixed.

So, please, help me with fixing printer. The feed mechanism advances paper a bit,
one side better than other. Does it have two rubber rings on single shaft to do it?
May be, replacing the rubbers would fix it?

I could not find any photos and detailed info on fixing printer's paper feed mechanism. If you where to find such info and photos, please help me.

Did you try the 97 Service Manual from the MoHPC flash drive? Yes, there are two pinch rollers.