Re: 1541 Assy# 250442

From: Gerrit Heitsch <gerrit_at_laosinh.s.bawue.de>
Date: Wed, 30 Nov 2016 16:33:46 +0100
Message-ID: <5c3c7451-9872-75af-1d08-d3a241cec31f@laosinh.s.bawue.de>
On 11/30/2016 04:06 PM, William Levak wrote:
> On Thu, 24 Nov 2016, smf 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?

I do have two ASSY 250442, one with a 9602 und one with a 74LS123. The 
differences mentioned above fit the visible differences. There are 
photographs available by email.

  Gerrit



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