[Error Code] SC503 paper bank cassette

[Freckled Legs]

Working on a mpc2500. It has a 3rd cassette I think is called a paper bank cassette. It holds 2 large stacks of paper and feeds out the right side. When right side is depleted, paper on left side moves to the right. Problem, it will not move to the right when needed and gives a SC503 error. I can manually move the guide to the right and will go back to the left to home position. It will feed paper from the right side. Nothing is broken or out of place. Did try to replace pcb and electromagnetic clutch with no result.
What is causing the guide on left not to move the paper to the right? Can ya'll help me?

[Smee]

Re: SC503 paper bank cassette

Im sure ive had this and changed everything except the feed unit...then for the hell of it I changed the feed unit and it fixed it. Was a while ago tho so not too sure what model it was on.

[Besserwisser]

Re: SC503 paper bank cassette

Hi Try to replace the black gear that drives the guide. It looks ok but its broken inside. It cant pull when the load is to heavy. Ive had this many times. Good luck.

[Haggy0310]

Re: SC503 paper bank cassette

I totally agree with Beserwisser. Try just a few pages. If this works try a ream of paper. When it stops you know the black gear is worn. Had this before a couple of times. Sorry smee no ofense bro.

[Debs1964]

Re: SC503 paper bank cassette

Hi Try to replace the black gear that drives the guide. It looks ok but its broken inside. It cant pull when the load is to heavy. Ive had this many times. Good luck.

Agreed, the gear has a D shaped drive shaft, the D in the gear rounds off (not explained very well, but I hope you understand)

[collme]

Re: SC503 paper bank cassette

I have this problem on the same lct but was doing it even when left side was empty. Works fine while it has paper in right side but as soon as it runs out and lowers the tray it throws the code up. So the lift motor is ok. I have checked shaft and gear and then tried running machine with just the right deck pushed in so it would not even attempt to move the stack from left to right and got the same result. I have replaced the lift sensors and going back with a control board since i hoped to have ruled out anything to do with the left deck mechanically. Any other suggestions would be appreciated though. Thank you

[Iowatech]

Re: SC503 paper bank cassette

I have this problem on the same lct but was doing it even when left side was empty. Works fine while it has paper in right side but as soon as it runs out and lowers the tray it throws the code up. So the lift motor is ok. I have checked shaft and gear and then tried running machine with just the right deck pushed in so it would not even attempt to move the stack from left to right and got the same result. I have replaced the lift sensors and going back with a control board since i hoped to have ruled out anything to do with the left deck mechanically. Any other suggestions would be appreciated though. Thank you

I don't know if this is helpful, but have you checked the connectors those drawers plug into on the machine to make sure there isn't like a wad of paper in them or something?

[zames77]

Re: SC503 paper bank cassette

Yeah the drive boards on these LCTs go sometimes. I had one last week that would throw SC503 intermittently and the shift plate wouldn't go all the way home, it would just sit half way across the tray. Replacing the board sorted it.

[collme]

Re: SC503 paper bank cassette

I don't know if this is helpful, but have you checked the connectors those drawers plug into on the machine to make sure there isn't like a wad of paper in them or something?

I have checked the connectors on both the machine and on the left deck. Righ deck does not have any electrical connections. just waiting for control pcb to arrive to try.

[Exok]

Re: SC503 paper bank cassette

If i'm not mistaken, isn't SC 503 a paper lift error and SC 505 is a paper shift error? I would start by taking the front cover off the right side and checking the wires going to the paper stack height sensors. Maybe as the last sheet feeds out the SC 503 is triggered due to the machine not detecting the right side is empty. If the machine thinks the right side is not empty that would also explain why your not getting paper shifting from the left.

Also, there should be little gates, one at the front and one at the rear that open before paper shifts from left to right then close once paper is in position on the right. If one of these gates is broken (as can happen if a user is sloppy in loading paper) the paper will never shift from left to right although you can manually load paper on the right and it will work.

Side note: if you can move the push plate that shifts the paper from left to right by hand, you probably have a broken gear and or pulley. When all parts are in good condition you should not be able to move this plate by hand unless you disengage the drive motor.

[collme]

Re: SC503 paper bank cassette

thank you for your suggestions but the right hand deck is lifting and lowering perfectly and the sc553 occurs just as the lift plate reaches the lower limit. As for slider, on the lct for the mpc5000 the drive for it is taken from a motor in the back of the lct and not on the left hand draw so once the draw is pulled out it is not in contact mechanically to any motor but just a shaft with a d drive gear and a drive belt. Still not got back in to machine yet but common sense says lower limit sensor or board. Will keep updated. Thank you all

[Bantams]

Re: SC503 paper bank cassette

Paper end sensor pawl isn't off broken is it? Oh and those LCTs are Sh1t

[collme]

Re: SC503 paper bank cassette

paper feed unit in perfect condition, not even paper dust on it. Machine only done 70k from new and it is detecting both paper out and paper stack level in right deck and paper out or paper stacked in the left deck. if left deck is empty then it should not even attempt to push the deck from left to right once the right deck has depleted,(if that makes sense). so it rules out anything to do with the end fence drive in the left deck. tried all new sensors for tray lift today and new control board but still the same. so in brief, r/h deck works perfect till runs out of paper, it detects it has ran out of paper, lowers plate ok but instantly throws a sc503 as plate hits lower limit sensor even with no paper ready waiting in l/h deck. help lol

[Debs1964]

Re: SC503 paper bank cassette

I'm sure you've probably already checked it, but is the base plate on the right hand side completely level, if it isn't level, when it lowers it doesn't hit the lower limit sensor and will declare an SC503

[Bantams]

Re: SC503 paper bank cassette

When you put paper in the left side does it detect it and move it across when there's nothing in the right side? Oh and check the Socket at the back if its like a martini lct Those nasty customers get little bits of paper stuck in the connectors sometimes.