MX3100 POD2_N Jam

[Dark Helmet]

Ive got a MX3100 jamming in the delivery unit every 60 pages or so and the jam log shows them all as POD2_N. The copier has 60k copies on it. It looks like something is stopping the paper since the fuser drives the rest of the paper out and crumples it all up but there are no dents or any thing in the lead edge. Ive seen this exact same jam happen on another 3100 with 100k on it but it was very difficult to replicate. Ive attached a photo of were the paper stops just at the grey transport roller. Usually the paper is a bit lower that what is shown in the photo (i played with the paper a bit before i took a picture) and is almost always right at the the transport roller.

[OMD-227]

Intermittant POD2_N jams on those models, during long runs of D/S pages from any tray (except Bypass tray) is caused by noise or poor condition of the PTC unit.

One sheet will always concertina between fuser and exit unit, as the exit unit stops rotating. The remaining sheets will be in the ADU, transfer section and just prior to CPFD1 sensor.

Also, check PTC operation in duplex mode Heavy1. If an abnormal sound is heard and/or C4-00 trouble shows up, replace the PTC unit and reset its counter in 24-04.

[Dark Helmet]

Ok so i tossed in a new PTC and it made 1 set and jammed and made a funny noise when it did jam. I tried heavy paper mode and ran 1 set and did not run into a problem. After a few more jams i remembered to reset the PTC counter in sim 24-4 and after that it made 70 sets with no trouble. I called back this afternoon and no problems yet.

[OMD-227]

Well... thats good aint it?

I did say to replace & reset the PTC... makes all the difference.

[Dark Helmet]

Time will tell i suppose

I put the PTC i removed into a 2600 and could not replicate the problem so im still unsure of what is going to happen here.

That bloody plastic stick is worth $200 bucks from parts or you can order the transfer belt kit for $190. Im glad i don't pay the bills

Thanks Wazza

[OMD-227]

That particular jam problem & associated noise is definitely a problem with the PTC unit.
Whenever that happens here, a new PTC unit (spare part version), goes straight in, reset PTC, never have same issue again. We carry a few of them in our cars now as it has become a common thing.

Did you happen to clean the white element surface of the original unit you put into another machine? We've noticed that if they become covered in a light toner dusting, the same issue can happen. Once cleaned, the jams or C4 codes seem to stop, but usually come back within the month. Once replaced with a new one, problem is gone for good.
Keep an eye on that original PTC unit. I can almost be certain you'll be back to it.

[vincent64]

What excatly are ya'll calling a "PTC" unit, looking at the pic in the first posting, I am thinking of a turn over unit, least thats what I called it.
I have a MX 2300 doing what looks to be the same thing there, or pretty close to it, had that unit out and clean the sensors in it.
but still stalls on duplex.
Its in a church office, and they do there weekly bulletins on this machine, lots of color and duplexing.

[OMD-227]

Hey Vincent....

Only the second series MX machines (eg 2600, 3100, 4100 etc) have the PTC unit. Have a look at the Parts manual for the 2600/3100, section 20.

If a MX2300 is jamming on duplex, check the jam code.
If its APPD1, then you could have a faulty APPD1 sensor in the top of the side door. Its pretty common these days, as these models get older... the sensor doesn't like the heat from the fuser. I've had a few cases where the sensor would seem to work in service mode/sensor test, but be completely dead in regular mode.... so be careful with diagnosing this one. Jamming here also depends on if your machine has a finisher installed, as the lead edge goes up over the finisher entry, before reversing down into the side door for a D/S job. I mention this, because the FNX1 has an adjustable entry gate solenoid position and the FNX2 centre drawer (RBX1) also has an adjustable entry gate solenoid position. Sometimes these are positioned so the gate cannot open the full way. Position the solenoid in a way that the finisher entry gate is at its maximum gap. This helps with paper that might have curled a little bit through the fuser, as there is now a bigger gap for the lead edge to pass through.
Give us the jam code for more help.