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SF2030...post transfer, flat jam ... symptom occurs between 1-15 copies ... not consistant ... in addition when theexit switch is activated during the copy cycle, a jam is not indicated #!@?

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  • sinsater4322 Jul 02, 2009

    Jamming occurs regardless of the paper source.

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FYI... The copier will show a jam for 3 reasons. 1 Paper never got to the sensor, 2 Sensor sees paper there all the time or 3 Paper doesn't arrive at the right time. Alot of times paper feed rollers are dirty or worn, often ignored and overlooked, and these will give intermittant jams that show up anywhere in the paper path, often looking like a differant problem. Sometimes sensors are dirty with paper dust and will show a jam when there isn't one, in which case a can of compressed air is good to blow them out. Question, is this jamming out of all drawers and bypass or just one drawer. This would help in eliminating possibilities. Good luck, let me know if you have more questions. Please rate this. Thanks

Posted on Jul 02, 2009

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Hi Camru, I wondering if the jam light is on at power up before data is sent to your machine or if it occurs after a print job is sent to it?

If it is on constant ie before a print is sent to it, then we have a sensor or paper detect switch activated. If this is the case then it can be a piece of paper or a remaining fragment of paper holding down the switch or the switch arm itself is broken or its corresponding light sencing photocell is covered in toner/dust.

In Printers there are a number of these sensors in the paper path, generally we have one that detects paper at cassette and bypass position, another at registration roller another at fuser exit, the machine monitiors these switchs for activation to tell if a jam is present. These switchs are tiny plastic arms that get pushed down when paper passes them which in turn blocks the photocell sencing light. One normally finds fragments of paper sticking the arm down, or the arm broken, most of the time the printer also tells us jam position so we know which switch it is seeing a jam condition at. Check the switch operation by looking for them, and ensuring the arm is moving freely.

The other possibility is the machine with no data present shows no error but a error occurs when a print job is sent to it. If this is the case it is caused usally by incorrect paper size settings in printer paper size menu or the printer drivers paper size settings on installed driver in printers under control panel of computer, It can also be caused if the paper is feeding multi sheets from cassete due to dirty rubber rollers in printer itself or not picking paper from tray at all as the feed roller is slipping on paper in tray due to losing its grippyness.

I clean feed rollers with water, just slightly damp rag and rub the rubber surface of the feed roller, sometimes they are so worn they need replacing, I will post a pic for you and also here is the service manual of a machine pretty much the same as yours.

This is another uses post on how he fixed his, please note this will be the same as yours only if jam only occurs after data is sent to your machine.

Cheers

Steve


2_3_2012_6_55_32_am.jpg

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