Back in June 07 you wrote
Need a copy of an service manual for a Canon PC-795 printer. My problem is a paper jam locate around the middle section of printer. Have look and look and there's no sign of any paper jam anywhere. My display panel has an blinking light and a squggle symbol that won't go away. Please help, any assistance will be appreciate. Did you find an answer, Im having the same problem
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If the error indicator light is lit, then the Canon printer is jammed. To fix a paper jam you must remove the paper tray, disconnect the AC power adapter, wait 5 seconds, then plug the printer back in. If the jammed paper does not automatically eject, carefully remove the paper manually. To help prevent further jamming, fan the paper in the paper tray to prevent the paper sticking together.
Either there is a small fragment of paper still hidden in the carriage somewhere, or the sensor is defective. If you can't seem to locate the problem, it would be best to contact Canon directly and ask technical service for assistance.
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!