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Setting aside the clock signals for the moment, I moved on to the Reset circuit, I definitely have an issue here: UB11 pin5 is fine but pin6 only drops to about 4V, never goes full 0V - 0.80Mv. RP7 pin2 stays at 5V. This seems like the most significant issue I've found so far. Need to figure...

The 'main' Xtal has 31.334 MHz written on it, that and the C16M 16.667 Mhz clock is perfectly in speed with the guide. I'm having trouble with 3.9MHz specifically. Y1 and Y2 are also part of the clock signals? How are the clocks divided in to the slower speeds? Thanks. EDIT: Setup my scope...

Are there more crystals than the largest rectangular one? How would I confirm the C3M clock is having problems in this case?

Where is that exactly, and how would I check it? Thanks!

Hi all, Really glad to have found this forum recently and specifically the Simasima Repair Guide posted here, much thanks for that! I purchased this SE/30 around this same time last year and recapped every board in the unit, also removed UE10 and reinstalled it, fixing all of the broken...