Question about Canon imageRUNNER 1370F All-In-One Laser Printer

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Black streak on one side

I'm getting a large black streak on one side of pagewhen print or faxing...was told it may be the "blue-green roller assembly"...quoted in excess of $300 for part...can you help to determine if this is the problem?

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Stop the print with a little practice, half to 3/4 of the way threw machine by opening door at right time. You want the paper to be jammed/stopped after the drum (has image on paper) but before fuser (print should still rub off)

fuser is blue green 300 thingy

If print is line less where stopped then mark is from fuser, replace

If print has line before fuser then it is drum/cartridge

..probally drum..need more info to know for sure, ie you say mark when faxing I guessing you mean receiving, what happens in copy mode is same as printing I'm assuming too

Posted on Nov 08, 2007


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My brother MFC 8500 is receiving alright but everything I send out has a big black streak going down the right side of the page. Confirmation page also has big black streak.

Let me see if I got this right.

The received fax is clean but when you send one out it has a black streak on it.
Cool! So far so good.
Makes sense because for sending, the fax scans the original document and parts of the scanning area could be dirty and so on. Therefore a black streak may appear.
The same black streak would also appear when you make a copy, because the original document must also be scanned.

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I have black streaks on my 1600n prints. I have tried cleaning the drum, however the streaks still exist.

Dirty print out is basically due to cartridge related issues. Take out the cartridge and clean its drum/ (green roller) with a dry, soft, lint-free cloth. The drum is usually located under a cover. Checkout for any spilled toner inside the printer and clean it also. Print a few pages so that the parts get further cleaned. I think, this would solve the issue.

Moreover, black streaks (thicker lines) and dots etc indicate faulty PCR Roller which is located behind the green drum inside the cartridge. Cartridge or get the PCR Roller changed by a professional.

Let me know if any further clarification is required.
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Try cleaning the rollers with rubbing alcohol using a good quality paper towels, I find there is a buildup on the rollers causing streaking on the paper. If that fails the print head must be suspect.

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The green roller is the drum which has a cleaning blade to remove excess toner, when the drum gets older it becomes clogged and will dump toner back out onto the drum. Just some info on it. Best fix is replace the drum, you could take it apart and attempt to dump and clean it but it's rarely worth doing that.

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Dirty copies.

Does this streaking problem occur when printing (not copying)? If it does then you are probably looking at a consumable issue. Alot of times black streaking is caused by a defective or spent drum. Is your drum new? There is also a blue piece on the drum unit used to clean the corona wire that cleans the drum. Have you tried moving it back and forth several times?

If the problem only happens when copying and the streaks are as bad as you make them out to be then you problem have a bad CIS unit (scans your originals for faxing or copying)


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