HP-41C high freq. beep - Printable Version +- HP Forums (https://archived.hpcalc.org/museumforum) +-- Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum-1.html) +--- Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum-2.html) +--- Thread: HP-41C high freq. beep (/thread-66032.html) |
HP-41C high freq. beep - Erik Wahlin - 11-21-2004 I ahve a couple of HP-41CV calculators tghat just emit a high frequency beep when they are turned on. Does anybody know what might be the problem? Re: HP-41C high freq. beep - Karl Schneider - 11-21-2004 Are these fullnut (1979-1984) or halfnut (1985-1990) units? I bought a fullnut 41CX that displayed gibberish and emitted a high-pitched tone, punctuated by pulses at-one-second intervals. (The CX clock might have explained the pulses.) An ultrasonic cleaning and resoldering of bad contacts by www.fixthatcalc.com fixed the problems. NOTE: Fullnuts are more servicable and repairable than halfnuts.
-- KS
Re: HP-41C high freq. beep - Raymond Del Tondo - 11-21-2004 Hi,
this usually occurs when the tone register hasn't benn resetted properly, Perform a BEEP (press SHIFT 4) and the HF tone will go away. Raymond
Re: HP-41C high freq. beep - Jon - 11-21-2004 Hi:
A full reset should solve that problem.
Good luck
Re: HP-41C high freq. beep - Erik Wahlin - 11-23-2004 I could not perform a machine reset and the squeeling persists.
Re: HP-41C high freq. beep - Jon - 11-23-2004 Hi: Remove the battery pack and short the end battery terminals together (just for a moment). Install batteries again. May be you have to press the ON key more than once to turn the calculator on. If it doesn´t work you need it to be internally cleaned. Regards
Jon
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