Canon 2050P Clear paper Jam error

[Guest]

We have a Canon LaserClass 2050P that has developed a "Clear paper Jam" error on the display. I have checked everything, blew out any dust and general checked it over. Then I ran thru about 12 copies and it came up with the Jam error. I'm thinking it may be heat related to the fuser element.

[yourownfree]

I doubt it. check for slow or no return on the sensor flags, springs off etc. dont flick them, engage them and let go to see if they hang. Is there a noise when it happens or does it just stop? could be your cartridge. could be fuser,gear related, could be feed rollers. where does the paper stop at? do any rollers skip a beat? could even be the transport.

[eljac]

Thanks yourownfree -
There are a lot of things suggested in your reply. What makes thisdifficult, is that it works 100% as an outgoign FAX machine.It is ONLY when the 2050 tries to print. And when it stops with the JAM error, there is NO paper anywhere except in the source tray. No evidence of it even trying to select a sheet of paper when the jam occurs; no noise; etc.
The troubleshooting costs will exceed the cost of the FAX fairly quick.
Thanks.. eljac

[yourownfree]

without pulling out the book, the paper should be touching the roller when cassette is pushed in, mark the roller with a felt pin or pencil to see if its turning. If not follow the shaft back to a clutch. There might be a solenoid not firing, at the clutch. That would be a "click" just before paper feed turns. You could measure the voltage across it, probably reads "0" until it fires. since both sides of coil are at 24 volts until it activates then one side goes low, allowing you to see 24 volts. Analog meter works great for visual, but you can see the digital flicker to 24 volts DC.
ok got the book, looks like if the feed roller is not turning, spring clutch(called cam unit) HG5-2186-000, solenoid HH7-2415-000, and looks like a one way next to the feed roller that could give you problems HB1-4286-000. I would check the solenoid with power off and check the resistance. if none its shot. put your meter on the lowest ohm scale to check, removed from pc board its plugged into. Maybe you can cheat the covers and watch it too.

[eljac]

Thanks. But I need to pass on most of your suggestion; I think I am capable of doing the testing, I just don't have the time or the testing equipment available at this location. My contract here has to be fixable with a screwdriver or pliers and some basic visual troubleshooting. I agree with your concept and what to test, but unfortunately I was looking for a simple fix if known.
Thanks.. eljac

[nmfaxman]

Try cleaning the feed rollers with a damp cloth.
If it feeds for a while then starts jamming again it needs new rollers.

[eljac]

thx nmfaxman; I can do this. I have blew the printer with compressed air, but did not wipe the rollers. Although I did check to make sure all the appropriate rollers were present and not damaged. I just did not clean them.

eljac

[CanonHPTech]

Don't think too deeply about these faxes... very simple machines... are the same engine that the HP LaserJet 5L/6L/3100 are based on... need to post where the paper is in the path when it jams. Is it still in the cassette? Is it accordian in the fuser? Is it coming up the rear of the machine? Let me know and I will be able to help you.

[eljac]

CanonHPTech:
As I stated earlier, the machine works 100% as an outgoing FAX machine. It is ONLY when the 2050 tries to print. And when it stops with the JAM error, there is NO paper anywhere except in the source tray. No evidence of it even trying to select a sheet of paper when the jam occurs; no noise; etc. It just stops with the 'Clear Paper Jam'. If there was paper crinkled or stuck somewhere, I would have a good idea where the problem exists. This thing is acting like it decided NOT to push up the paper source and decided it was easier to simply display an error message.

[CanonHPTech]

Ok... well, I would take the top cover off, and watch the right-hand rear side of unit. There will be a gold color soleniod (HH7-2415) mounted to side of frame that when activated, the big white gear assy (HG5-2186-020), which is the pick-up cam should rotate. If the solenoid never goes off, I would start there and trace back to board. If the solenoid does fire but no drive of cam, then I would replace the cam. If both seem to be working, then you got a roller/sep pad issue. I have seen these rollers (HB1-4282) quit working, even with a lot of tread still on them. Some times cleaning them brings them back. The sep pad (HB1-4673) is also mounted in an assy. with a spring that could be out of place not providing enough pressure between the roller and pad. Now, outside of all of these steps, the actuall motor (HH7-2422-000) that provides drives the cam could possibly be bad, but that would be the last thing I would look at. Motors don't usually fail, their connectors can become loose or tech errors can cause damage, but rarely fail. Bear in mind, to correctly replace the cam, roller or pad, you need to seperate the top half of unit from cassette. I say correctly, because it can be done without totally seperating, but is dangerous, alot cables can be damaged. This machine can be figured out by a first timer with a little bit of careful hands and patience. And by the way, these unit has only 3 sensors in the path from the cassette to the delivery, thats why it is easier to t/s then a copier with 10 different sensors. Good luck sir, please post results.

[eljac]

Well CanonHPtech; I followed your guide, and came to the conclusion that the expense to repair will exceed the cost of a Fax machine. Not surprising.
I had the cover off, and followed the cycle very carefully during a COPY procedure. Copied 1 page, then 2, then 4, then 8 until a Paper Jam error.
At all times, the source started into the reader about 2 inches, then the new paper would feed and the copying continued. When the last page fed into the reader, there was NO new paper feed and the resulting JAM error.
As I look at this, it could be the solenoid ( which I cleaned but still resulted in error, this time after 4 copies ). Next point is likely the HG5-3120 circuit card. This card is listed about $375-$400. And at this point, I was instructed to stop because of cost. So it could be this card, or it could be ????? So at this point, I have to say ' Case Closed '.
And I appreciate all of the help along the way.
Thanks... eljac

[CanonHPTech]

well if the solenoid is firing most of the time, as it sounds, then I would think your Cam first. Does it make a noise like it is 'dropping' the cassette plate between picks? If so, most of time I find it is the Cam. Please note that this is still a current model from Canon and a new one would cost you around $600-700. Pretty reliable machine, much better than a $100-300 Brother fax. So if customer says scrap I would hang on to it, or send it my way!

[eljac]

In answer; when I was watching the precise movements; and as I said doing a COPY. The input would feed a sheet partially, then the solenoid would unlock the rotating cam allowing it to feed a blank shhet of paper into the print mechanism.
When it failed, the solenoid did NOT unlock the rotating cam. And it was based upon this logic that I assume the problem has to be before the solenoid. And as I see it, the rotating cam is after the solenoid has tripped.