HP-97 Service manual

[Jonas Sandstedt]

Hello,

Perhaps this is well-known, but I was astonished to see that there is a newer version of the HP-97 service manual availabe at
https://literature.hpcalc.org/
This one is dated June 1982 compared to the previous one that is dated August 1976; there is another font and the pictures are sharper. The scan is very good.

best regards
Jonas

[Karl-Ludwig Butte]

Hello Jonas,

thanks a lot for this link - at least for me it was new information.

Best regards

Karl

[Jonas Sandstedt]

Hello,

Also note the "Service notes" at the end, here some experiences are collected, and also disussing a ROM update policy for older ROM that cause some errors.

best regards
Jonas

[Dreato]

Thanks for pointing to this new service manual. It shows both the old and new Logic circuit board layouts.