HP Forums / HP Calculators (and very old HP Computers) / General Forum v / Looking for something I'm sure I've seen (25c)

Post Reply 
Looking for something I'm sure I've seen (25c)
06-07-2019, 04:31 PM (This post was last modified: 06-07-2019 04:34 PM by BobVA.)
Post: #7
BobVA Offline
Senior Member
 		Posts: 450
Joined: Dec 2013
RE: Looking for something I'm sure I've seen (25c)
I'd be suspicious of the ACT chip, which can malfunction in a surprising number of ways.

If you have some basic troubleshooting experience and the equipment, you might want to check the outputs of the power supply to rule that out. The HP-25 schematic
here has the necessary information.
Find all posts by this user
Quote this message in a reply
Post Reply 


Messages In This Thread
RE: Looking for something I'm sure I've seen (25c) - BobVA - 06-07-2019 04:31 PM



User(s) browsing this thread: 1 Guest(s)

Contact Us | The Museum of HP Calculators | Return to Top | Return to Content | Lite (Archive) Mode | RSS Syndication