MP2550 - Intermittant jamming from tray 2?

[OutlawTorn]

Hey all, having issues with an MP2550 - the machine is only jamming from tray 2 and the paper isn't leaving the tray so I figured it was just the take-up roller worn. I replaced that and the friction pad but the problems remain?

I noticed that the paper tray mechanism was slightly bent so I altered that but now if the paper tray is full the machine doesn't recognise the paper and says tray 2 is empty. Is it possible that the paper lifting mechanism is damaged? Does this give intermittant jams?

I'm a bit stuck so any help would be appreciated, thanks.

[TonerMunkeh]

Could be the spring's snapped in the lift assembly or the motor's had it. While you're in the back of the machine put a dab of superglue on the sensors that detect the side fence position.

[OutlawTorn]

The tray is still lifting though? If I put less paper in the tray it rises up and seems to be functioning ok (bar the jamming from the tray that follows)

I was just curious that when it is full the error happens and it made me think that may be the root of the jamming issue?

[TonerMunkeh]

Yeah, the spring could be weak. Just replace them both. There's a good way to test this the thing with the sensor too. Put the trays on auto detect. Put A4 landscape in the tray. If it detects A5, the sensor is out of position. As I said, if it is, put a blob of superglue on there.

[OutlawTorn]

That is really interesting as the user said they had to turn off auto detect as it kept telling them they had A5 paper in the tray (when it was A4)

Thanks TonerMunkeh, really appreciate this advice. Sorry to be a pain but could you explain a little clearer what you mean by putting glue on sensors?

Thanks!

[teebee1234]

I've had this problem before, it was due to the chuck on the tray lift motor had a split in it and if the cassette was partially filled it would work. If the cassette was full, the weight was too much and the chuck would spread open and only partially lift.

[zed255]

That is really interesting as the user said they had to turn off auto detect as it kept telling them they had A5 paper in the tray (when it was A4)

Thanks TonerMunkeh, really appreciate this advice. Sorry to be a pain but could you explain a little clearer what you mean by putting glue on sensors?

Thanks!

There is a sensor in the back that detects the position of the paper tray side fences. For 'wide' sizes / orientations the tray lifts a different amount than for 'narrow' ones. It is also used for auto-detecting paper sizes. It can often come off its bracket and lead to paper feed, jamming and mis-detection issues. Glue should prevent it from coming off. There is also a TSB regarding this that relates to the installation of a mylar to hold the sensor in place.

The lift springs can also be a problem as they sometimes outright break or can just be weak. I've seen some guys actually install two lift springs and claim good results but I've never tried it. I have however annealed the sharp bend in the spring to prevent breakage and created a small loop in the straight portion of the spring to provide more lifting force (the area I loop is also annealed as the springs are quite brittle).

[TonerMunkeh]

What he said.

I also said A4 landscape, I meant portrait.

[Vioksrall]

Is the tray settings at AUTO DETECT MODE?

[OutlawTorn]

Is the tray settings at AUTO DETECT MODE?

No, auto detect is turned off?

[Magyver]

I've been fighting this type of problem from tray one. Also, the lift system overdrives due to the paper bottom plate not moving up. Then when you pull paper tray out you cannot push it back in without removing lift motor to release lift mechanism. The real issue is the rear end fence being to tight against paper. Feeding paper long edge first is more problematic. Notice the paper tray body on the friction pad side. There are 4 wide ribs on the right inside of the tray. With long edge first the stack of paper digs into all 4 ribs. Try setting rear end fence tight against a ream of paper and try lifting the bottom plate by hand and you'll find it difficult, back off end fence until you can lift it with little drag against the ribs and mark end fence setting for customer. This is one cheesy paper lift system!!!!

[brodera]

Bring a functional tray to your client and try it out. If its working well good take the other tray back and expreriment on it

Sorry for my bad english.

[Debs1964]

This is a common problem on these machines, as someone earlier has said, it is a sensor out of position at the back of the machine. Take the rear cover off and look at where the long spring for the tray lift is, approximately half way along that you will see a sensor on a bracket. Take the bracket off the machine frame (1 screw) and you will probably see that the sensor isn't sitting flush on the bracket, refit the sensor and put the bracket back in position with the tray fully closed (otherwise it still doesn't seem to work), the sensor can be glued into position, it generally comes out of position by the user closing the tray too hard. Hope this helps

[rthonpm]

Another thing to try is to manually set the size for the tray through user tools and then unplug all of those sensors in the back of the tray. I have a few of these boxes in coal mines and this is the only way to keep them working for longer than a week.

[colortek]

On this model, you have to have auto detect turned on. It will jam with it turned off for what ever reason, and someone turned it off to get around the paper size issue that was earlier advised with the sensor that was earlier directed to. There is a bulletin for this problem & for the sensors that was advised to apply super glue.

I copied & pasted it below:

[Symptom]
Jam Code 003, No feed from Tray 1


[Cause]
The Side Fence Sensor becomes dislodged or mis-positioned due to the customer closing the tray in a hard manner.
The Side Fence [D] (Sensor 4) is not properly actuated causing an error in size detection which leads to improper lifting pressure being applied to paper stack.
Most common is when 11 x 81/2 paper is loaded in Tray 1 and during lifting it is detected as 51/2 x 81/2
Action]
1. Correct position of Side Fence Sensor (AW02 0173)and Bracket (D019 2795) or replace

If you take off the back cover & look where the plastic paper tray rails travel through the back of the machine, you'll see the sensors knocked off.