mpc 2504ex

[chargeroller]

I have a mpc 2504ex that the black cuts out or has a very light image. Only the black is affected. If you print a counter page maybe the first couple inches are washed out and the rest is ok. On a color test page and the colors are fine but black is gone or washed our. I tried replacing the pcu and ITB unit and neither took care of the problem. It always does it on the second side of a two sided copy. It will only do it every so often on a single side. Any thought before I dig into it? I am going back with firmware and Lasor unit today. My account says I am a newbie but I switched companies and created a new account.

[luca72]

I have a mpc 2504ex that the black cuts out or has a very light image. Only the black is affected. If you print a counter page maybe the first couple inches are washed out and the rest is ok. On a color test page and the colors are fine but black is gone or washed our. I tried replacing the pcu and ITB unit and neither took care of the problem. It always does it on the second side of a two sided copy. It will only do it every so often on a single side. Any thought before I dig into it? I am going back with firmware and Lasor unit today. My account says I am a newbie but I switched companies and created a new account.

it could be the developer unit internal broken maybe, but send us the "pm counter status" to have a complete picture of the consumables situation
so in words, we are not magicians

[chargeroller]

its not the dv unit. I replaced the complete pcu ,dv unit and pcu. Its almost like its loosing voltage. After talking with the customer they said they had a power outage and it started after that. So I am going to go back with a few boards and firmware. I just wondered if someone had this problem before so maybe I could try their fix first before getting to involved with it.

[luca72]

its not the dv unit. I replaced the complete pcu ,dv unit and pcu. Its almost like its loosing voltage. After talking with the customer they said they had a power outage and it started after that. So I am going to go back with a few boards and firmware. I just wondered if someone had this problem before so maybe I could try their fix first before getting to involved with it.

Also bring the complete power supply box, on the 2004ex and 3004ex unlike all the others I have had a couple of them blow out, not with that problem though, but it also happened to me after a power failure, perhaps on that particular model they are a little weak.
***check anyway the presence of rear pcdu cover, someone might have forgotten it before you***

[Leoculus]

***check anyway the presence of rear pcdu cover, someone might have forgotten it before you***

this! so easy to forget to swap this over. or the foil that contacts the shaft of the dev may have gotten bent and is not contacting the shaft properly

[chargeroller]

The problem ended up being the black developer solenoid sticking. Ricoh has a video on this problem. The pad rots out and gets sticky. I took one off a Junker and problem solved.

[luca72]

The problem ended up being the black developer solenoid sticking. Ricoh has a video on this problem. The pad rots out and gets sticky. I took one off a Junker and problem solved.

thanks for the feedback, interesting!...never happened this failure on those models, I have to remember it, you never know.
this video what do you say, where did you find it?

[chargeroller]

here is the link to the video https://youtu.be/YsT3cL86mT8

[Larhal]

here is the link to the video https://youtu.be/YsT3cL86mT8

Thank You.

[MIKON]

Black development solenoid is sticking

[GIUBOSS]

The problem ended up being the black developer solenoid sticking. Ricoh has a video on this problem. The pad rots out and gets sticky. I took one off a Junker and problem solved.

It happened to me once, it would be enough to put a little talcum powder on the sponge or simply remove it, shorten the spring slightly, the problem hasn't recurred for months.

[slimslob]

The problem ended up being the black developer solenoid sticking. Ricoh has a video on this problem. The pad rots out and gets sticky. I took one off a Junker and problem solved.

Often you can just remove the pad and it will work fine. Will get a bit of clicking noise when the solenoid energizes. That is why the pad is there, to reduce the noise.