> On 2016-11-24, at 11:28, smf <firstname.lastname@example.org> wrote: > > On 24/11/2016 05:10, William Levak wrote: >> Looking at the schmatic, I find a note that it is good for 250442 and 250446 with the following changes: >> >> Component 250442 250446 >> UD4 9602 74LS123 >> R12 22K 15K >> C31 33pF Eliminated >> >> It appears that the same PCB was used for two different assemblies. > > Do you know if there is any board rework required to convert a 250442 to a 250446? If so then this may have been reworked in the factory to use up existing pcb's (or some time later during a repair). It would be strange to change the ASSY number for a component change, but people (especially commodore people) do strange things. I would expect the rework to be needed around the 74LS123 but nothing like that is visible on any of the 250442 boards I examined. -- SD! Message was sent through the cbm-hackers mailing listReceived on 2016-11-24 13:02:04
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