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Non-functional HP 33E
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05-13-2021, 08:33 AM
Post: #6
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RE: Non-functional HP 33E
(05-12-2021 09:18 PM)quantumforce Wrote: Any suggestions what could be causing this? Is it a bad chip, or something I might be able to repair if I take the circuit apart? In the background there can be seen the HP-33E/C User manual. Chapter "Service and Maintenance AC Line Operation" says: "Note: Do not attempt to operate the calculator from an ac line with the battery pack removed". What the manual doesn't say: This will destroy the circuits inside. Just Read The Instructions! As the previous post said, use 2.5 VDC with the correct polarity to the battery posts for testing. If you are lucky the circuit has survived. Otherwise the only repair would be the SPICE LP. Bernhard That's one small step for a man - one giant leap for mankind. |
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| Messages In This Thread |
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Non-functional HP 33E - quantumforce - 05-12-2021, 09:18 PM
RE: Non-functional HP 33E - Steve Simpkin - 05-12-2021, 11:26 PM
RE: Non-functional HP 33E - quantumforce - 05-13-2021, 01:43 AM
RE: Non-functional HP 33E - AndiGer - 05-13-2021, 06:19 AM
RE: Non-functional HP 33E - Steve Simpkin - 05-13-2021, 06:54 AM
RE: Non-functional HP 33E - PANAMATIK - 05-13-2021 08:33 AM
RE: Non-functional HP 33E - quantumforce - 05-13-2021, 07:58 PM
RE: Non-functional HP 33E - aurelio - 05-13-2021, 08:19 PM
RE: Non-functional HP 33E - quantumforce - 05-13-2021, 08:24 PM
RE: Non-functional HP 33E - PANAMATIK - 05-13-2021, 08:42 PM
RE: Non-functional HP 33E - Maximilian Hohmann - 05-13-2021, 09:03 PM
RE: Non-functional HP 33E - PANAMATIK - 05-14-2021, 08:40 AM
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