Recent content by christcc2

Yea I think it's time to pull the analog board for some service. When I purchased this two years ago the seller said it had been serviced during the 640x480 upgrade, but now I'm wondering. New problem, when I was probing CP35 with my multi-meter (machine was on) the Mac immediately lost power...

Next question. Should the 3300uf 16V look like it’s bulging at the top, and thoughts on these two diodes that look burnt underneath?

What voltage should I be checking for on that capacitor?

Where abouts would CF10 be in this image?

Well I just rebooted the machine and now it looks like this:

Does someone have a schematic they can share?

I have a Mystic Color Classic with the VGA mod done to the analog board. Display geometry has been fine until last week, when the bottom is now compressed and squished vertically - and a portion of the top third of the screen appears stretched vertically. The picture is also shifting up the...

What would we speculate is the failure rate of the flybacks? What’s the estimated lifespan?

A jumper switch would be great, or pads so you can just solder jumper wires to achieve the voltage and configure the sense lines.

@JDW have you successfully recapped the display? If so, any improvement?

@ArjenCNX feature request as a Mystic CC owner - a way to easily "configure" the board into "VGA Mod Mode" for supporting 640x480 instead of the default CC resolution.

I recently picked up this 3400c that for the most part is in excellent condition other than needing a new power adapter, a replacement PRAM battery and maybe some service to the power supply board. (Or a replacement one). After reading through Jeff Geerling’s restoration post and some posts on...