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HP34C Repair
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04-05-2021, 03:37 AM
Post: #10
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RE: HP34C Repair
I can verify the "slight bend to the Pins" works to repair intermittent faults on my HP34c (now for sale on Ebay).
Also comment please 1.The inside of the HP34C also has what appears to be a DC-DC converter (coil transformer, transistor, diodes, resistors capacitors so i am wondering if the 9 Vac input is actually regulated down to 3v to charge and run the microprocessor? 2. I have noticed that AA alkaline cells are every so slightly longer than the original NiCads and cause compression damage to the contacts and the plastic battery compartment cracks. My thought is NOT to use AA alkaline cells ever but use Nicad or maybe NiMh cells exclusively. Barry Moore retired elec. engineer HP Prime, Hp 40, Hp 35S, Hp15c, HP12c, HP34c |
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| Messages In This Thread |
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HP34C Repair - javico - 10-29-2018, 07:00 PM
RE: HP34C Repair - burkhard - 10-30-2018, 06:46 AM
RE: HP34C Repair - Steve Simpkin - 10-30-2018, 07:51 AM
RE: HP34C Repair - aurelio - 10-30-2018, 10:55 AM
RE: HP34C Repair - javico - 11-08-2018, 05:38 PM
RE: HP34C Repair - Zaphod - 11-08-2018, 06:03 PM
RE: HP34C Repair - javico - 11-11-2018, 03:36 PM
RE: HP34C Repair - Dieter - 11-11-2018, 04:08 PM
RE: HP34C Repair - DANTONVB - 11-11-2018, 04:55 PM
RE: HP34C Repair - barry2718 - 04-05-2021 03:37 AM
RE: HP34C Repair - rprosperi - 04-05-2021, 04:05 AM
RE: HP34C Repair - barry2718 - 04-08-2021, 07:59 AM
RE: HP34C Repair - AndiGer - 04-05-2021, 07:53 AM
RE: HP34C Repair - barry2718 - 04-08-2021, 08:01 AM
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