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HP-41C Troubleshooting
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02-25-2024, 10:09 PM
Post: #10
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RE: HP-41C Troubleshooting
The 4093 chip SMD version arrived and I could install it and close the calculator.
See my post #8 above for details (Meanwhile I have added some pictures and video there as well). Ugly cosmetic job but it will work as intended for as long as needed: Picture: CD4093BM SMD fixed with Silicone adhesive over polyamide tape. Video: Testing the buzzer fix Picture: Second layer of polyamide tape to isolate the circuit. Picture: Processor PCB in final position, external power cabless about to be removed. Picture: Preparing the rendez vous of the two PCB assemblies Picture: Cabinet closed, new feet installed, charging complete of my modified 82120A Battery Pack. Video: Final test. XEQ TONE 0 to 9 on a ISG loop Jose Mesquita RadioMuseum.org member |
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| Messages In This Thread |
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HP-41C Troubleshooting - UraniumNutt - 01-04-2023, 06:19 PM
RE: HP-41C Troubleshooting - rprosperi - 01-04-2023, 07:11 PM
RE: HP-41C Troubleshooting - Diego Diaz - 01-05-2023, 02:48 AM
RE: HP-41C Troubleshooting - UraniumNutt - 02-03-2023, 02:51 AM
RE: HP-41C Troubleshooting - brouhaha - 02-04-2023, 07:17 AM
RE: HP-41C Troubleshooting - Mark H. Shin - 02-03-2023, 03:24 PM
RE: HP-41C Troubleshooting - jebem - 02-21-2024, 12:39 PM
RE: HP-41C Troubleshooting - rprosperi - 02-21-2024, 01:11 PM
RE: HP-41C Troubleshooting - jebem - 02-21-2024, 01:58 PM
RE: HP-41C Troubleshooting - jebem - 02-25-2024 10:09 PM
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