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Atari 1200XL main board versions. Any differences?

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I've seen 1200XL main boards with 153 Rev A, 253 Rev A, 133 Rev A stickers on them.  Is the three digit prefix just a supplier number and they are all the same (Rev A) or are there differences between them?  If so, is one type more preferred than others?

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The stickers are just the date it was made... week 15 of 1983 and week 13.

There are three versions of the board that I'm aware of.. I'll have to take a look at my notes.

 

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26 minutes ago, kheller2 said:

The stickers are just the date it was made... week 15 of 1983 and week 13.

There are three versions of the board that I'm aware of.. I'll have to take a look at my notes.

 

Thanks.  It should have been obvious since they all end in "3".  What I've noticed are 3 types of PCB finishes.  One is a lighter green with a shiny finish.  One is a darker green with a dull finish (no shine).  The third is a dark green with a shiny finish.  Were they all made in the same factory, but different batches?  Odd that they have different finishes with such a short production run.  My hunch is that Atari had three different suppliers fabricate the main boards with the expectation of these being initial runs.  Thinking they were are going to sell 100,000's (as this was supposed to be a new launch of their new flagship machine), they could then down select the best supplier??  If so, these suppliers had every incentive to ensure high quality for their first batch.

 

Edited by ACML

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On the solder side, what does it say?  

 

These are the three versions I'm aware of:

  1. REV 11A  - This is the PILOT run
  2. REV 13A (Typically the dark board)
  3. REV A (typically the light board)

 

I don't have any proof as to which board (13A or A) came first, other than the sequence.

 

 

 

 

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