SE/30 Reloaded. Strange clock signals

[Steve Rieck]

I have a reloaded board in a Simasimac status. Current clock signals are:

Y1 = 32Mhz in spec
Y2 = 32Mhz in spec
GLUE PIN 17 = 32Mhz in spec
GLUE PIN 18 = 16Mhz in spec
Y3 = Erratic, Intermittent supposed to be 16Mhz? Sometimes around 10, sometimes no reading.

Anyone have any idea what might be causing the issue at Y3? And if I need to replace the crystal itself, does anyone know of a suitable replacement on mouser or digikey etc..?

Thanks.

 

[GreenBar0n]

Y3 confused me too. Here's what my scope signals looked like for Y3 and what I was told on the following page:

https://tinkerdifferent.com/threads/2-macintosh-se-30s-full-restoration.4910/#post-43041

Y3 was fine, just hard to measure accurately.