SCSI Chip Verification

[LaPorta]

Hi guys, just looking to verify that this should be a solder-in replacement for the SE/30 SCSI chip before I purchase. Looks it to me via the markings on my chip.

https://www.ebay.com/itm/QTY-1x-NCR-53C80-609-3400257-SCSI-Interface-Controller-PLCC/140919602890?epid=1801820997&hash=item20cf767eca:g:WUIAAMXQTghRJFxV

 

[dougg3]

I bought this exact same item from this exact same seller almost 5 years ago to replace the corroded SCSI chip in my IIx and it worked like a charm. I'm guessing the SE/30 uses the same chip too...

 

[Crutch]

That’s the chip in my SE/30 for sure. 
 

By the way, are you sure there’s a problem with your chip and not eg corroded traces nearby?

 

[LaPorta]

I’m willing to try a new chip, for two reasons:

One, I buzzed and traces out every-single-trace I could from the schematic and they seem all good.

Two, I remember this board being bad some ~20 years ago because of this same gray screen issue when I put it into storage. I think I may have pulled off a SCSI device with the machine on.