[Electrical] PAPER JAM SIGN MPC7500

[katash]

Hello to all,

hope you had good festivities,

please help!!permanent paper jam sign at duplex,

has anyone encountered such as this?

looked for pinched wires swooped Bicu but persistent,I'm i missing something?

[mikadonovan]

Re: PAPER JAM SIGN MPC7500

Enter sp mode and check the jam code to identify which sensor is at fault. Replace the offending sensor.

[TonerMunkeh]

Re: PAPER JAM SIGN MPC7500

Check the duplex connector for paper scraps. The Venus and Martini duplex units are fairly bombproof, they don't go wrong too often.

[mikadonovan]

Re: PAPER JAM SIGN MPC7500

Check the duplex connector for paper scraps.

This is a good idea. Seen it a few times.

[JustManuals]

Re: PAPER JAM SIGN MPC7500

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[katash]

Re: PAPER JAM SIGN MPC7500

thanks guys for the ideas will have a go at it and get back on the findings

[katash]

Re: PAPER JAM SIGN MPC7500

guys i have wrestled with this monster but i can't seem to reset the paper jam at E!

I've changed boards and connectors plus sensors it just stares at me!!the door sign i noticed was not closing so I'm going with the door switches and last but not least the power supply

any ideas?

[CableGuy]

Re: PAPER JAM SIGN MPC7500

This always always always a piece of paper in the connector in the rear of the machine. Get your torch out (that's a flashlight for you yanks lol) and look into the depths of the machine, you may have to remove the dulpex unit for a good view. Straighten out a paper clip and scrape out any crap in the connector.... Just switch it off first or you may light yourself up....

[katash]

Re: PAPER JAM SIGN MPC7500

This always always always a piece of paper in the connector in the rear of the machine. Get your torch out (that's a flashlight for you yanks lol) and look into the depths of the machine, you may have to remove the dulpex unit for a good view. Straighten out a paper clip and scrape out any crap in the connector.... Just switch it off first or you may light yourself up....

hi CableGuy!thanks for the response fortunately i have done that and also removed the transport section to access the connectors scrapped them and checked if pins deformed.

just wondering when i remove the units and cheat the door the paper jam sign does not disappear

[CableGuy]

Re: PAPER JAM SIGN MPC7500

Hi, well you're onto something there. Just checking, but have you used the input/outputs to check sensor operation? That should lead you to the offending sensor. As you say, it may be a trapped wire etc, but this will pinpoint it for you
Also, there are a few out of sight sensors in that area
good luck

[katash]

Re: PAPER JAM SIGN MPC7500

Hi, well you're onto something there. Just checking, but have you used the input/outputs to check sensor operation? That should lead you to the offending sensor. As you say, it may be a trapped wire etc, but this will pinpoint it for you
Also, there are a few out of sight sensors in that area
good luck

hi their!

just stuck with this problem checked the cabling from the fuser to the VBCU board NO PINCHED WIRES!

Just wondering how come this jam is not registered on the paper jam by location?[since i last cleared the memory]JAM AT E!

[fbkhan3]

Re: PAPER JAM SIGN MPC7500

guys i have wrestled with this monster but i can't seem to reset the paper jam at E!

I've changed boards and connectors plus sensors it just stares at me!!the door sign i noticed was not closing so I'm going with the door switches and last but not least the power supply

any ideas?

you need to fix the door open sign first, I'll go for a blown fuse in the power supply or a door switch.it should take care of the jam indication in (E) as well.

hth.

[katash]

Re: PAPER JAM SIGN MPC7500

you need to fix the door open sign first, I'll go for a blown fuse in the power supply or a door switch.it should take care of the jam indication in (E) as well.

hth.

i appreciate your response,mark you i have tested and retested all boards,the power supply was the first,then the door switches then vbcu and controller boards,man!this is really a challenge i think will go for help on hands on tech!whats your take,hey sandmac where are you?[misspelled]

[fbkhan3]

Re: PAPER JAM SIGN MPC7500

i appreciate your response,mark you i have tested and retested all boards,the power supply was the first,then the door switches then vbcu and controller boards,man!this is really a challenge i think will go for help on hands on tech!whats your take,hey sandmac where are you?[misspelled]

Disconneting the sensors in duplex one by one and doing the same with connectors at IOB and drive board,looking for pinched or trap wires,firmware upgrade and last one i'm putting my money @ new chips(NVram).

Hope sandmanmac,tubojetboy will be here soon.i would also love to hear from them regarding this issue!





good luck with that,

[Iowatech]

Re: PAPER JAM SIGN MPC7500

Off the wall thing: hopefully you have already checked that the duplex sensor targets are clean enough that the sensors can detect whether a piece of paper is passing by. Probably not the solution to this problem, anymore I've only seen that in document feeders, mostly in the smaller machines. Still, back in the day the 22/27 cpm machines had duplex problems like this, so if you haven't already done that you might want to try cleaning the sensor targets if time permits and see what happens.