Question about Canon MultiPASS MP700 All-In-One InkJet Printer
I had a paper that didn't go into the printer, removed it after the second try of printing a document. The paper was sliding in about 8cm but was then left at that position during the print operation. Has the ink drowned the paper-feed-sensor or what has happened?
Without too much violence I managed to remove some of the outer plastic shieldings of the printer, but still I can't reach the printheads, which doesn't show up in the normal area. Do anyone know which nuts & bolts to remove the scanner-part?
Most printers use infrared optical sensor with a plastic mechanical flag to detect paper position and timing. The sensor itself is most likely underneath the platen that the paper moves over, there might even me a few sensors. The sensor would be in the mid-section fo the printer before the printhead carriage path. What you need to look for is a plastic flag that hinges back and forth when paper pushes against it, this flag will then block the infrared beam underneath and indicate that paper is currently at that position.
I've quite often seen small pieces of paper get stuck in the flag causing it to always be blocked or to not allow any movement. Blow out the printer with a can of compressed air to try to dislodge any paper that may be stuck. The compress air should also be able to move the flag. I've sometime used a fresh sheet of paper or even card stock and fed it through the printer manually to see if it gets stuck on something. It has also happened that a flag has broken or snapped out of place, this may require that you disassemble the printer further to get to the sensor and flag. One thing I have never seen though is ink gumming up a sensor, they are always positioned in a way that ink cannot get to them.
Another thing that may be happening is timing issues. The printer uses timers to judge when paper should be hitting a certain sensor. If the sensor is not activated in a certain time then it will assume that a jam has happened somewhere before that sensor. I've seen that slippery paper pick up rollers will slip on the paper and not send it into the printer soon enough and the printer then assume a jam in the pick-up assembly. So clean your pick-up rollers also.
Unfortunately I cannot provide disassembly assistance having never seen your type of printer. Manufacturers don't usually provide disassemble instructions for ink-jet printers as they consider them disposable. I've usually had to guess how to remove the plastics and get to the innards as you have done. Good Job! They can be tricky as they aren't intended to ever be taken apart. With some perseverance you should be able to break it down further if needed. All-in-one units with scanners on top like yours can be especially tricky to take apart as the scanner is always in the way.
It's important to know, when troubleshooting jams, exactly where the paper stops and whether it's consistent or not. This will give you a good idea of the exact area that is causing your problem.
I hope that my advice has giving some direction and idea as to what you should be looking for. Good luck, and thank you for using Fixya.
Posted on Jun 09, 2008
May be the paper sensor is not functioning perfectly
try by replacing the sensor
Posted on Jun 09, 2008
Is your paper still stuck?
Posted on Jun 02, 2008
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Posted on Jan 02, 2017
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