Re: HP K21-5321B Digital Clock
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Philipp, ? What is the clock doing/not doing.? I went looking for our manuals and it seems they did not survive the purge. ? One thing to do as a preventative measure is to look at the row of chips next to the NIXIE tubes.? In between them (I think I¡¯ve got the position right) are resistors.? These are the current limit resistors for the NIXIEs and they get hot enough to burn the board.? We always replace them, installing about a 0.25 in above the PCA.? ? The circuit for this part is very similar to the display section of the 5327B.? ? We built a replacement clock that actually remembers who it is when the power is cycled so all of the old stuff got packed. ? I¡¯ll talk to my partner but I can¡¯t find the spare boards of manuals we used to have ? Steve ?
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From: [email protected] < [email protected]> On Behalf Of Philipp G Sent: Tuesday, April 21, 2020 1:57 AM To: [email protected]Subject: [HP-Agilent-Keysight-equipment] HP K21-5321B Digital Clock ? Hello,
maybe anybody has a service Manual f¨¹r the K21-5321B Digital Clock.
My clock dosent work the right way. I already tryed swaping ICs but i think that more than one is faulty...
Best regards from Germany
Philipp Gr?mer
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