HP-65 1333A18516 - [SOLVED] request for advice
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06-16-2024, 06:21 PM
Post: #6
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RE: HP-65 1333A18516 - request for advice
(06-15-2024 07:25 PM)albertofenini Wrote:(06-15-2024 05:35 AM)teenix Wrote: Pin 8 of the cathode driver is the Reset Pin (1820-1226) Tony forget the previous post as the measurements were probably mistaken we have measured the voltages from both a working HP-65 (S/N 1508A04995) and the HP-65 under repair S/N 1333A18516 We have measured with the scope all the suggested curves for both units and both at the logic board interconnects and at the drivers, I'm posting two links to the images Please, keep in mind that the logic board S/N 1333A18516 connected to the keyboard with the drivers from the 150804995 works perfectly Let us know what do you think thanks again and take care !! Curves from 1333A18516 can be seen here :CURVES FOR NOT WORKING S/N 1333A18516 Curves from 1508A04995 can be seen here :CURVES FOR THE WORKING S/N 1508A04995 Edoardo & Alberto |
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Messages In This Thread |
HP-65 1333A18516 - [SOLVED] request for advice - albertofenini - 06-14-2024, 11:29 PM
RE: HP-65 1333A18516 - request for advice - teenix - 06-15-2024, 01:00 AM
RE: HP-65 1333A18516 - request for advice - albertofenini - 06-15-2024, 01:33 AM
RE: HP-65 1333A18516 - request for advice - teenix - 06-15-2024, 05:35 AM
RE: HP-65 1333A18516 - request for advice - albertofenini - 06-15-2024, 07:25 PM
RE: HP-65 1333A18516 - request for advice - albertofenini - 06-16-2024 06:21 PM
RE: HP-65 1333A18516 - request for advice - teenix - 06-17-2024, 02:06 AM
RE: HP-65 1333A18516 - request for advice - albertofenini - 06-17-2024, 05:20 AM
RE: HP-65 1333A18516 - [SOLVED] request for advice - albertofenini - 06-30-2024, 07:11 PM
RE: HP-65 1333A18516 - [SOLVED] request for advice - teenix - 06-30-2024, 11:44 PM
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