Canon Pc720 Copier Paper Jam

Thanks Repairman99!

That was EXACTLY the problem with a copier my grantmother has! I was able to find the spring and the plastic "hook" that broke off!

Used a small screw to reattach it and works again!!!

Thanks so much for your post!!!

The problem with the paper jam (but not feeding) is that a small
piece of plastic that holds one end of a spring the causes the feed
gears to push against the powered gear on the back side of the toner
cartridge breaks off. So the unit does not feed (no pickup rollers
etc) and it thinks there is a paper jam (no moving paper). Orienting
the front as the side you work at, the back being the back, the
feed being the side the paper goes into and the output being the
side the finished copy comes out, open the unit. Looking into it
from the output side almost to the input on the bottom notice the
small hairlike things sticking up. Move to the left (back of the
machine) and see a few white gears all hooked into this gray metal
housing that moves up and down about 1/2 inch (It pivots). At the
top input side of this metal you will see a part of the metal that
stick up and has a small slot in it. the spring used to hook onto
this and the other end hooked to a small piece of plastic down and
more to the input side a bit, onto the upper input side of the white
plastic part that houses a shaft to a roller (fat little spring
about 1 inch long). the plastic part breaks off and you usually
can't see that a part was even there. The spring will still be in
the area. If you are handy, you can figure out how to fix it. I got
a longer spring (same strength) bent the metal toward the back 1/4"
and ran the new spring from there to a 1/16 hole I drilled in the
plastic side next to the circuit board (down low and back). I shaped
the end of the spring (where I drilled)to keep it more inside and
not hit anything. Works fine.
Steven

I think you are looking at the wrong direction. If the paper jam occured just after you pressed the start button; and the paper did not leave the paper cassette then the paper sensors are working correctly. This is because the sensors are expecting to see the paper coming but did not therefore initiating the jam signal.

Check the paper feeding roller and the transport roller if they are worn out due to aging.