My Canon PC-795 shuts off mid copy everytime. The page is in the middle of theclamshell section with half a copy on it. I press the power button it powers up with a paper jam error. I remove the paper restart and try a test copy and it does the same thing. If I power it on and leave it, it stays on no problem but as soon as I make a copy same problem happens.
What could this be? Also when I got this copier there was a large black screw, the screw looks plastic, rattling around inside. I did not power it on or use it with the screw in there and it may not even be from this unit but I figured id mention it.
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Your scan lamp is going bad. It is the flourecent type lamp that lights up under the glass. You can try making a copy with the top cover open and watch it. You will see it flickering before the code comes up.
$75 from precisionroller.com Part#L5180 or the canon # FH7-3272-000
Sounds like your drum cartridge might be bad.
Something you can try that might narrow down the problem is to make a copy of something and shut the copier OFF in mid copy.
(Basically, when the light is about 1/2 way finished scanning.)
Then, open the machine up and removed the jammed paper which should be 1/2 way through your machine and hopefully about 1/2 way under the drum/toner cartridge unit.
See how the copy looks at that point. **** FYI **** The toner on the paper is NOT FUSED so it will RUB OFF. Keep the paper away from your clothes and toss it.
IF your copy has smudges on it, then there is a real good chance that your drum unit is bad and needs to replaced.
If the copy looks good, then there is a possibility that the fuser unit is bad and needs to be repaired.
I would say that your drum unit is bad with my experience with Canon Copier.
If you still have more questions, feel free to ask.
Have a good day. Good luck.
Either the Fuser/Heating unit is bad, or the optics are dirty.
What you can try to do to narrow it down, is to make a copy but.. STOP the machine in mid process by turning the power off. This will create a paper jam in the machine. If timed properly, your copy should be 1/2 way through the machine with some image on it. (Make sure that you are trying to copy something on the glass). The copy is not FUSED, so the toner will wipe off so be careful not to rub the page against your clothes/sleeve. IF the black line is on the page at this point, the problem is not in the fuser but probably in the fiber optics. If the problem is in the optics and will need to be cleaned. If the black line is NOT on the page at this point, then the fuser unit is bad and needs to be replaced.
Let me know how the copy comes out when you stop the machine in midway and I can see if i can give you any more suggestions. Good luck.
A smudge across the copy can be in many different areas.
The drum cleaner may be the problem as you indicate.
It may be a piece of paper ripped of dragging across the surface of the paper causing the smudge.
Also the fuser roll coating may be very worn and causing that. One thing to try that can show you if the defect is on the drum cartridge, is start to run a copy, After the paper feeds and this is timing, shut the machine off when you think the paper should be about half way through the copy cycle, then see if the copy defect is on the unfused page, If it is smeared before it reaches the fuser, it is in the cleaning section, if it is not smudged, then it is most likely the fuser rollers are needing replaced.
First look for a paper fragment in the path, step 2 is to shut the machine down in mid copy and see if the defect is there.
The fuser is the hot area of the machine in the exit area, If you can take a flash light and look in there and see if you observe wear or heavy toner buildup on a roller then obviously thats the problem.
The blinking light with the squiggle symbol is the display for a paper jam. Not sure a service manual will help in this situation other than to be a guide as to where the paper sensors are located. There are usually 3 or 4 paper sensors located in Canon PC copiers. The first sensor will be located between the paper pick up assy and the vertical rollers*(*which are located behind the door on the right hand side used for clearing jams). The second sensor is located under the toner cartridge just before the registration rollers. The third sensor (if present)is located at the entrance of the fuser assy (some models of Canon copiers have omitted this sensor)The last sensor is located at the exit of the fuser assy. I would suggest that you remove the cassette, verify that a piece of paper has not been partially fed or ripped in the pick up assy. With cassette out of machine, open right hand door & verify that there is no jam and check that the flag or arm of the sensor moves freely. Remove the cartridge from machine and again verify there is no jam and the registration sensor arm moves freely. If there is a sensor in front of the fuser assy, verify that it also moves freely. Finally, check for a jam and sensor movement at the exit/fuser. After checking all sensors, unplug the machine and plug back in. (Do this without the cassette & cartridge installed but with all the covers closed) This should give you an install cartridge & cassette message. Install cartridge first. This should give you the install cassette message. Install cassette. If you still get a jam signal when plugging the machine in without the cartridge or cassette, the most likely cause is a blown sensor.(rare, but I have seen it.)If this happens you would then need the service manual to disassemble & repair. I'll keep an eye out for your reply!