The Museum of HP Calculators

HP Forum Archive 15

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HP41 repair
Message #1 Posted by Lars Johansson on 13 Mar 2006, 10:49 a.m.

I'm having a go at an HP41CV from 1982. After cleaning there is som life in it. There is some flicker on the display and a high pitch whining sound. Any suggestions which component is faulty? It seems that it might be the large condensators?


Re: HP41 repair
Message #2 Posted by Karl Schneider on 14 Mar 2006, 10:50 p.m.,
in response to message #1 by Lars Johansson

Lars --

I had a fullnut HP-41CX from 1984 that, even when turned off, emitted a high-pitched sound interrupted by pulses from the clock (which your CV doesn't have).

I sent it to a US individual's sideline HP calc repair business; his standard service of ultrasonic cleaning and re-soldering where necessary, cured the problem.

-- KS

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