Meanwhile if anyone has an ImageWriter (even a II or LQ), can you discharge the capacitors (by pressing the power button to turn it on *after* unplugging the mains cable) and then measure the resistance between the two AC power cable poles, and let me know how much it measures? Thank you!
Doesn't need saying, but MAKE SURE NOTHING IS CONNECTED TO THE MAINS. I want you to measure the poles of the AC cable connected to the printer, not the mains! Don't do it unless you know what you're doing.