Re: 1541 Assy# 250442

From: smf <*smf_at_null.net*> Date: Thu, 24 Nov 2016 10:28:13 +0000 Message-ID: <a9cdde00-2dfc-c99a-714e-64c70b9354e3@null.net> · smf_at_null.net

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.

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