[Misc] Reoccuring Set Drum Message MPC2800

[Jeffjazzy]

I have been dealing with this issue of set drum messages for the black PCU. I have replaced the black PCU and the problem stayed the same. I checked the condition of the terminal that the drum plugs into on the rear frame and it is in apparently very good shape. I was there on 9/16/15 and I reseated the connectors on the IOB and the BICU board and the problem went away from the 16th until this afternoon when I got a call from the customer that the message had returned. I'm really at wits end and could use some help on this.
Thanks all.

[slimslob]

Re: Reoccuring Set Drum Message MPC2800

CN227 on the IOB is where the PCUs connect to. Pins A1 to A8 are the black unit. I would look for a loose solder joint or bad cable, PN D0295301.

[C.Vallon]

Re: Reoccuring Set Drum Message MPC2800

I was there on 9/16/15 and I reseated the connectors on the IOB and the BICU board and the problem went away from the 16th until this afternoon when I got a call from the customer that the message had returned. I'm really at wits end and could use some help on this.
Thanks all.

When you reseated the connections on the IOB and BICU did you make sure to reroute the wire harnesses into their proper positions? Could possibly be a pinched wire causing the issue. You mentioned that you replaced the PCU with a new unit already and the issue stayed? Yet was working fine until recently? I'd start with checking my harnesses for any damage or pinches.

[NeoMatrix]

Re: Reoccuring Set Drum Message MPC2800

Are you using modified drums or using original part number drums ?

If using modified drum units make sure the TD senor was original and/or wires are crossed over into the correct position.

Maker sure you have removed/filed enough off the RJ-45 connector and that you have not pushed the RJ-slot out of the back of the machine.

HTH

[Jeffjazzy]

Re: Reoccuring Set Drum Message MPC2800

I appreciate all the feed back I've received on this so far. I'm going to go ahead and order an IOB board, the harness and also the HV Power Pack which tech support recommended. And we shall see if any of this makes a difference.

The PCU that I replaced however was a new drum and non-modified so we should be good as far as that goes. I wanted to go ahead and replace the female RJ connector for the black PCU but I was unable to find that part #. If anyone knows that can you pass it along?

Thanks once again for your input.

[mikadonovan]

Re: Reoccuring Set Drum Message MPC2800

I wanted to go ahead and replace the female RJ connector for the black PCU but I was unable to find that part #. If anyone knows that can you pass it along?

If you are talking about the machine side connector, I think you have to replace the entire drive unit. Major job.

[kannuki2]

Re: Reoccuring Set Drum Message MPC2800

just out of curiousity, what is the part number for the black drum you replaced?

[slimslob]

Re: Reoccuring Set Drum Message MPC2800

If you are talking about the machine side connector, I think you have to replace the entire drive unit. Major job.

From looking at the point to point, I think they might be part of the harness assembly.

[duct tape]

Re: Reoccuring Set Drum Message MPC2800

I had this exact problem, after replacing several parts I ended up replacing the entire wiring harness for the rear of the machine , that was what fixed my problem hope this may help.

[Jeffjazzy]

Re: Reoccuring Set Drum Message MPC2800

just out of curiousity, what is the part number for the black drum you replaced?

It was the D0292256 Black PCU.

[Jeffjazzy]

Re: Reoccuring Set Drum Message MPC2800

I had this exact problem, after replacing several parts I ended up replacing the entire wiring harness for the rear of the machine , that was what fixed my problem hope this may help.

So, when you say entire wiring harness, was all of this just one snake nest of harnesses or were there several harness that were required?
The one I have so far is D0295301.

[slimslob]

Re: Reoccuring Set Drum Message MPC2800

So, when you say entire wiring harness, was all of this just one snake nest of harnesses or were there several harness that were required?
The one I have so far is D0295301.

That is the one you need. There multiple harnesses on the machine. If you look main at the point to point the part numbers are shown as well as what each connects to. You will have to expand the image in order to see them. From what I saw, the D0295301 cable connects to the following connectors on the IOB: 217, 221, 222, 227, 228 and 229. You can check the p-to-p for where the other ends connect.

[duct tape]

Re: Reoccuring Set Drum Message MPC2800

The wiring harness was the entire rear frame wiring harness connecting all components on rear frame it was a booger to replace , I started on one end and worked through it to the other end.

[NeoMatrix]

Re: Reoccuring Set Drum Message MPC2800

What if you had a stepper motor field coil smoked in the Black Drum Motor ?
Point-2-point diagram says there would be no K-motor return lock signal ?
Could it be a slow K-motor throwing a tantrum ?

In truth I don't rightly know I'm just putting it out there to jog a light bulb in someone.

mpc2800p2p.jpg