Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

I bought an Epson C84 to convert for direct printing. It was
adverstised as having a clogged print head. I have read several
articles on how to unclog the print head. So far I have been
unsuccessful, but it is still early in my process.

The thought occured to me, however, that maybe the electronics driving
the print head are bad. How can I determine if the print head is in
fact clogged or if it is something else. Are there any voltages going
to the print head that I can check during the print cycle?