On the Ibanez two Humbucker setup with a five way switch (Ibanez 2502N), in position 2 (position ! being the bridge humbucker), you're supposed to get the inner coils of each humbucker in parallel.
[Imgur](
https://i.imgur.com/Jiw4ENq.jpg)
This is supposed to mimic position 2 on a Strat (though I suppose strictly speaking, a telecaster).
When you use after-market pickups however, you get the 'fingerboard-side' coil of each pickup, rather than the bridge side coil of the neck pickup - and they don't hum-cancel.
So are the DiMarzio neck pickups that come stock on Ibanez Prestige guitars wired slightly differently from stock DiMario pickups?
Comments
The DiMarzio humbuckers typically used in Ibanez guitars have twelve adjustable polepieces. Thus, if your neck/Rhythm position humbucker splits to the fingerboard side coil, you just reinstall it rotated through 180 degrees.
Depending on which OTAX switch you use, it may still be necessary to swap the conductors per coil. (As per the schematic diagram that you posted.)