He mentioned he had misplaced the paper they sent with the pickup explaining what parts to replace when he installed the new pickup. View the original note from Roland sent to Jonathan Prince. But Mark Wire was able to find a replacement hex divided pickup! 413100 Mark goes on to outline the resistors that need to be changed for the new #610 pickup.
I emailed back that his memory was probably fooling him, as there was no official Roland documentation on the pickup change. "We don’t have any humbucking pickups for your G-808 (I physically went out to parts dept. And Mark notes the serial numbers of the new and old pickups: Old type: #601 Pick-Up 22380601 New type: #610 Pick-Up 22380610. As it turns out, these are exactly the modifications that I outline in the notes below.
One pickup is small, with an impedance of 80 ohms, and the other pickup is slightly larger, with an impedance of around 900 ohms.
For my purposes, I labeled these pickups as "wide" or "narrow." One pickup is around 10 mm wide, and the other is about 12 mm wide.
In Los Angeles I have seen jazz players using the G-303 plugged straight into a Polytone amp, just for the sound and playability of this great axe.
In terms of sophistication of design and electronics, the weighty Ibanez IMG2010 comes out way ahead of the G-303, but like the Roland G-707, the IMG2010 is a bit of an acquired taste, and its curious body design means that the Ibanez IMG2010 is virtually impossible to play sitting down without a guitar strap!
Generally, the narrow pickup seems more common in earlier guitars, and the wider pickup is common with the later models.
I had been exchanging emails with GR-user Jonathan Prince, who had, once upon a time, ordered a replacement hex pickup from Roland. Mark Wire, it lays out all the technical information on the pickups that I had only surmised!
In addition, the standard 1/4” output jack solders directly to the PCB, rather than the ribbon connector.
The first time I tried to repair a failed op-amp in a G-303, I realized that the pin-out documentation was wrong on the schematic.
Which made me wonder if the op-amp information in the original G-303/G-808 Service Manual Schematics refers to the very rare "version A" board.