Are Lisa 2/10 and 2/5 I/O boards interchangeable

[max1227]

Hi Lisa enthusiasts,

I have a 2/5 which has I/O problems due to the corrosion and myself and a fellow member are trying to diagnose. I need to find out if the I/O board is the fault or potentially the edge connectors or traces on the motherboard. I don’t have a spare I/O board unfortunately.
 

Is it possible to interchange a 2/10 I/O board for a 2/5? This will require use of the same 2/5 motherboard, CPU card and memory boards although the latter 2 I believe are interchangeable between any Lisa system ROMs dependant I suppose if you have the Mac XL screen mod and 800k drive. A source using the Lisa FAQ says it is but the Lite Adapter should see modifications which involve cutting traces. So if I disconnect the Lite Adapter can I do it? Has anybody tried this?

Ive also read many posts on this forum that say you will destroy or damage the system if you plug in a 2/10 I/O board into a 2/5 system and since the rarity of these boards are forever increasing I would like very much to not add another dead one to the pile. 
 

Max

 

[compu_85]

You don't even have to disconnect the Lite adapter, the floppy drive simply won't work. The Lite adapter does 2 things: a pin converter to hook up the sony, and a PWM converter for the disk speed signal which is different between the twiggy and sony disks.

-J

 

[sunder]

So I haven't tried this yet, but vintagemicros has an altered LisaLite adapter here: https://www.ebay.com/itm/Apple-Lisa-Lite-Card-Modified-to-Allow-a-2-10-I-O-Bd-to-be-Used-in-a-Lisa-2-5/143173144110

which says it will allow this to work.

You can see the modifications are made by two bodge wires: