Question about Canon PC-795 Copier

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PC-795 Shuts Off Mid Copy

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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Clean big rubber paper feed roller above paper tray with a microfibercloth moistened with rubbing alcohol.

open copier look in lower section under the toner cartridge you will see a black foam roller wipe it off also and then try to use.

Posted on Jan 17, 2008


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LCD Appears in Japanese (or other foreign language)
If, upon powering on the machine, a language other than English is displayed, the setting can be changed by following these steps.

1. Press <ON/OFF> button to power on the machine.

2. Press the Home button
3 . Use the Easy-Scroll Wheel or cursor keys to select the Settings icon. Press <OK>.
4. Use the Easy-Scroll Wheel or cursor keys to select the Device Settings icon. Press <OK>.
5. Press the Down key four (4) times. Press <OK>.

6. Use the Easy-Scroll Wheel or Up/Down keys to select 'English', then press <OK>. Proceed to the next section to verify the settings

Verify the settings
1. Press the <HOME> button

2. Use the Easy-Scroll Wheel or the left.gif or right.gif buttons to select 'Copy', then press the <OK> button.

3. Use the Easy-Scroll Wheel or the down.gif button to highlight the page size (item <4> below) and press the <OK> button.
4. Use the Easy-Scroll Wheel or the down.gif or up.gif buttons to view the page size options. The options available for page size are A5, B5, A4, 8.5" x 11" (215 x 279), 5" x 7" (127 x 177.8), 4" x 6" (101.6 x 152.4) and Credit Card (if Auto sheet feeder is selected for paper source , item <3> above).

5. If additional page sizes are available that are not listed in step 4, above, your printer may require repair. Please contact Canon at 1-800-828-4040 orclick here to request support via E-mail.

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A smudge across the copy can be in many different areas.
Some ideas.
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.

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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! Good Luck!!!

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