--- In
Homebrew_PCBs@yahoogroups.com, "docstein99" <docstein99@...>
wrote:
>
> > 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?
>
> I am preparing to convert a C84 right now, which would be my third
> try at this. I have already done a lexmark and an epson 220, which
I
> believe is simular construction to the c84.
>
> I cant tell you for certain on the C84, but on the 220 the paper
> sensor was hidden behind where the print-head camps out normally.
> There is some type of lever mechanism that flips over when paper is
> fed into the machine. It was hidden on my epson as well and took
me
> quite some time to find it. Only after I managed to dismantle
> practically the entire top-rail, it showed itself. Was tucked in
and
> cliped on to the grey sheet metal with a small black plastic
> housing. By that time the frame was giving me hell sticking itself
> together making it really difficult to plan out a lifting strategy.
>
> BTW- There is also another sensor at the end of the paper feeding
> roller in the back, which must stay there in order for the machine
to
> boot up correctly, not to confuse with the paper feed sensor.
>
> Also, at times I got a little lost and thought I was taking off too
> much stuff, so I kept plugging it in to make sure it would boot up
> ok. If I moved something or took something off I wasnt certain of,
I
> plug it in to make sure it boots up; then if not - I knew I had to
> put that piece back on in order for the machine to work. I had to
> abandon the 220 because the project reached a point where the
printer
> no longer booted up and would not print, just with a blinking red
> light.
I'm still looking for the paper sensor. I have the printer stripped
down to its "bare essentials" and I still don't see the paper
sensor. I am assuming the paper sensor is an electrical switch of
some sort and therefore has to have wires coming from it. If this is
correct, I have not removed anything that has wires and I don't see
anything on the remaining structure that has wires that I cannot
account for.
Can the paper sensor be purely mechanical in nature?
If I don't find the sensor, I guess my next step is to hook up the
printer and see if it still works.
Thanks,
Paul