Post Reply 
HP38E wrong LED segments
10-26-2017, 07:03 PM
Post: #1
HP38E wrong LED segments
Hello repair doctors
I have a 38E wich is very clean inside and looks like new. But on 2 3 4 and 7 is an additional segment bright.
Have any one a idea what can be defect?

                   

Thanx for your help
Find all posts by this user
Quote this message in a reply
10-27-2017, 10:08 PM
Post: #2
RE: HP38E wrong LED segments
(10-26-2017 07:03 PM)Hans-Peter Wrote:  Have any one a idea what can be defect?

I have an HP-21 display with a similar defect on some segments. I could be a degradation of the GaAS semiconductor substrate. No idea for a repair. You need a replacement from another calculator.

Bernhard

That's one small step for a man - one giant leap for mankind.
Find all posts by this user
Quote this message in a reply
Post Reply 




User(s) browsing this thread: 2 Guest(s)