MPC4502 Single pass adf, black on CIS side?

[turbojetboy]

I have been called in to assist a tech tomorrow that has a MPC4502 that has the single pass feeder. Single sided scans and copies ok but anything passing by the Contact image sensor (CCD array) for the second side is reproduced as pure black. I havent been in front of the copier yet, but he has replaced the CIS assy and the fault remains.

Anyone seen this before?

[Tonerbomb]

Re: MPC4502 Single pass adf, black on CIS side?

I have been called in to assist a tech tomorrow that has a MPC4502 that has the single pass feeder. Single sided scans and copies ok but anything passing by the Contact image sensor (CCD array) for the second side is reproduced as pure black. I havent been in front of the copier yet, but he has replaced the CIS assy and the fault remains.

Anyone seen this before?

I recently had a funky scanning issue on a MP4002, with black copies. You could copy say 5 originals, the second would turn all black at some point on the page and all the rest of the job would be all black. When rebooted it was fine for a while, but the symptom always returned. Turned out that the SIO( scanner I/O pcb) was bad.

[TonerMunkeh]

Re: MPC4502 Single pass adf, black on CIS side?

When the CIS was replaced, was the stabiliser board also replaced? Have you tried updating the ADF firmware?

[turbojetboy]

Re: MPC4502 Single pass adf, black on CIS side?

Went out and looked at this machine, it was also camming over the fuser pressure roller with a ratcheting noise. After a bit of a think I checked the NVram values for the pressure motor timing, one was way off. Reset the value and the camming was fixed. It seems that somehow the NVram also spat the dummy on some of the adf values. After re-entering the values correctly it all came back to life. As it turns out the cust had some power difficultys and has a auto switching generator running a few times.....when all this started to happen.

[ptrflrs]

Re: MPC4502 Single pass adf, black on CIS side?

Went out and looked at this machine, it was also camming over the fuser pressure roller with a ratcheting noise. After a bit of a think I checked the NVram values for the pressure motor timing, one was way off. Reset the value and the camming was fixed. It seems that somehow the NVram also spat the dummy on some of the adf values. After re-entering the values correctly it all came back to life. As it turns out the cust had some power difficultys and has a auto switching generator running a few times.....when all this started to happen.

I was having those exact same issues and I found out that one of my esteemed colleagues (read as jerkface, douchebag, IT know-it-all coworker) reset the ram 5801 as instructed by ricoh tech support to solve a fax forwarding to email error. I'm not sure what setting fixed the fuser pressure motor from turning past the sensor but after a firmware update and re-entering all the factory settings it is back.

[PinevskiS]

Re: MPC4502 Single pass adf, black on CIS side?

I have been called in to assist a tech tomorrow that has a MPC4502 that has the single pass feeder. Single sided scans and copies ok but anything passing by the Contact image sensor (CCD array) for the second side is reproduced as pure black. I havent been in front of the copier yet, but he has replaced the CIS assy and the fault remains.

Anyone seen this before?

Yes i have a same problem on mpc4502a.
Cis (upper lamp) for the second side flash when i try to make duplex copy but copy is total black.

[turbojetboy]

Re: MPC4502 Single pass adf, black on CIS side?

You almost certainly have corrupt NV ram values. get out the machines birth certificate (behind front cover) and check all values, you most likely will find one or more showing garbage numbers. That was the problem with the one I saw.

[Oze]

Re: MPC4502 Single pass adf, black on CIS side?

I've had the same fault after an Engine ram clear...re input of the birth certificate values fixed it...like turbo said.

[SargeNZ]

Re: MPC4502 Single pass adf, black on CIS side?

Is clearing board rams a thing now? It seems that in every second thread someone was recommended an 'engine clear', only to spend hours putting birth certificate data back in, and to have the problem remain. Maybe I don't get the same problems you guys do but I've never had to do such a thing.

[turbojetboy]

Re: MPC4502 Single pass adf, black on CIS side?

Is clearing board rams a thing now? It seems that in every second thread someone was recommended an 'engine clear', only to spend hours putting birth certificate data back in, and to have the problem remain. Maybe I don't get the same problems you guys do but I've never had to do such a thing.

It's my pet hate, unless you have a confirmed good backup of the Nv ram data.

[slimslob]

Re: MPC4502 Single pass adf, black on CIS side?

Is clearing board rams a thing now? It seems that in every second thread someone was recommended an 'engine clear', only to spend hours putting birth certificate data back in, and to have the problem remain. Maybe I don't get the same problems you guys do but I've never had to do such a thing.

The usual recommendation is to never clear all memory unless you have a current backup of the NVram or at least have a current printout of all SP settings. The problem comes in when you have a corrupted NVram. Before going to the expense of replacing the NVram, try restoring settings from the birth certificate.

I have also seen inexperienced techs who don't look at the screen before pressing "Execute" and clear all memory, 5801, when what they were wanting to do was clear a fusing unit code, 5810.

[luiszr23]

Re: MPC4502 Single pass adf, black on CIS side?

use this codes

in sp mode

4712 = 3666
4713 = 3741
4714 = 4082

its works for me

I have been called in to assist a tech tomorrow that has a MPC4502 that has the single pass feeder. Single sided scans and copies ok but anything passing by the Contact image sensor (CCD array) for the second side is reproduced as pure black. I havent been in front of the copier yet, but he has replaced the CIS assy and the fault remains.

Anyone seen this before?

[slimslob]

Re: MPC4502 Single pass adf, black on CIS side?

I've had the same fault after an Engine ram clear...re input of the birth certificate values fixed it...like turbo said.

Doing Sp 5801-002 Engine Memory clear might as well be SP 5801-001 as -002 is the damaging part of -001 both erase all engine settings, birth certificate tech made adjustments such as registration and edge erase margin.

[slimslob]

Re: MPC4502 Single pass adf, black on CIS side?

Went out and looked at this machine, it was also camming over the fuser pressure roller with a ratcheting noise. After a bit of a think I checked the NVram values for the pressure motor timing, one was way off. Reset the value and the camming was fixed. It seems that somehow the NVram also spat the dummy on some of the adf values. After re-entering the values correctly it all came back to life. As it turns out the cust had some power difficultys and has a auto switching generator running a few times.....when all this started to happen.

Sounds like a location that could use quality power protection.

[davel]

Re: MPC4502 Single pass adf, black on CIS side?

But the thread is almost 9 years old. Dead and buried.