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Old 28th Feb 2021, 6:12 pm   #715
ScottishColin
Octode
 
Join Date: May 2012
Location: Perth, Scotland
Posts: 1,823
Default Re: Non-working Commodore PET 3016

Meter set to 2k

0V taken from ground screw

+5v taken from pin24 of UD9

Code:
                OV           +5V
DA0          0.502       0.403
DA1          0.502       0.409
DA2          Varied      0.2
DA3          0.508       0.412
DA4          0.511       0.413
DA5          0.523       0.413
DA6          0.509       0.412
DA7          0.508       0.410

DA2 went all over the place on the 0V check from 0 to 0.45 to 0.508 - I could not get a steady reading from it.

Colin.

Quote:
Originally Posted by SiriusHardware View Post
With the machine set up the way it is, (NOP test still in place, but everything else still connected as it should be) could you please, with power off, measure the resistances of the DA0 to DA7 lines to 0V and to +5V?
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