Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "Paul Sturpe" <sturpe@...> 
wrote:
>
> 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?
>


10 May, 2007,

I had to put this project on the back burner for a while but now I am 
back to it.

In stefen's article he refers to the "optical paper sensor" and 
states this is "glued to the side of the paper slot...." and shows 
this picture.


http://techref.massmind.org/images/pcb/etch/directinkjetresist/c84_pap
er_sensor.JPG 

I cannot seem to locate the optical paper sensor.  Furthermore, is 
the picture above where the sensor is located originally, or do I 
need to move it there from some other location?

In any event, I cannot seem to locate the sensor anywhere and it 
definitely is not glued in the spot shown in the above jpg file.

Any help would be appreciated.

Paul