Questions about lasers assembly

[rsonic]

Hello

I have a few questions about Saturn laser assembly:

1-JVC Model P608 and P604 are interchangeable?

2-Model 1 japanese Saturn all mounts Sanyo drives? Is there a way to recognize it wihout opening the console?

Thanks

[zyrobs]

1. the only interchangeable drives are
- JVC ENR-007 with Hitachi JA00292 (both have 20 pin ribbons, used on VA0 and VA1 boards)
- JVC ENR-013 with Sanyo 610-6185-30 (21 pin ribbon with the 32pin drive controller IC, used on VA6-9 boards)
- JVC HQA-001A with Sanyo 610-6294-30 or 610-6473-30 (VA10+ boards, they all have a white stripe on the edge)

2. Model 1s will 99.9% of the time use JVC ENR-007.
Only model 2s used the Sanyo drive and you can only tell by opening the console, bar a rare production run that always used Sanyo drives (PAL 1997 made VA9 boards with serial starting with 179... I think)

[rsonic]

Thank you