I've been watching that dodgy eBay 565 for a while, hoping the seller does a Best Offer or something.
Does anyone have schematics of the PS, or understand what fails? We seem to be able to get schematics of every other Tekyronix scope, just not these. Barring that, would anyone in the states be willing to pull the glass from the ET2020 and transplant it to my working 565? I really want the automotive features of the 2020. Obviously , you could copy the firmware for others to use.
There aren't any PS schematics I'm aware of, but it's not tremendously complex, especially if you have a working one to compare against. It is mostly two LTC1174s generating the positive and negative rail voltages for the whole device, plus a small LDO generating 5V for the Real Time Clock and SRAM.
I'd be up for doing a transplant (or maybe repair). The SMT on this is pretty easy to work with, and I didn't have any trouble removing the flash IC from mine. Plus, I have replacement caps for your RMS converter circuit, which (if hardcoreman and I are any indication) are probably leaking electrolyte.
I'd love to have another 565 firmware to compare against.