Mx-c312 prints light on left side

[spanky]

Re: Mx-c312 prints light on left side

Are you sure the shudder is opening fully on the LSU?

[Ratchet2501]

Re: Mx-c312 prints light on left side

Seems like it is. Can that cause such an isolated defect in printing just on the one color?

[copiertec]

Re: Mx-c312 prints light on left side

It seems like you have done everything except pulling out the lsu and looking at the black portion of it. I would pull it out and see if there is build up in that area or fogging of the glass. Seems you have changed all the things that would cause that issue, transfer units, including bk drum and developer units. How many copies are on the box? The LSU has a shutter and glass for each unit a total of 4 for one assembly. If one of them is covered in toner, developer, it will cause CQ issues as it can not see the image. If it is just black that is having the issues, pull the LSU and clean it.

[spanky]

Re: Mx-c312 prints light on left side

Yes, the shudder for just the black can stick.

I have removed the shudders on LSU units before for this reason.

[Ratchet2501]

Re: Mx-c312 prints light on left side

I used the cleaning wand and checked it out with my light, seemed alright but the results speak for themselves. Next time I go there, I'm pulling the lsu (looks like a pain on this one) and checking and or removing the shudder. I guess I was just under the impression that if the shudder didn't work the black would be completely blank. If the glass was messed up it would be spotty but cloudy wasn't something I had really considered. Thanks for the advice.

[harleyrider]

Re: Mx-c312 prints light on left side

Laser comes out pretty easy. Comes out left side. If I remember just move a pwb and it is right there.

[copiertec]

Re: Mx-c312 prints light on left side

MX-C Series LSU Removal.pdf

[Ratchet2501]

Re: Mx-c312 prints light on left side

Customer brought the machine in and after fiddling with the LSU and getting nowhere I tried re-replacing the developer cartridge and even though the other had a good 25-2, it fixed the problem. I am guessing since I haven't autopsied the old one that the seal that gets pulled across snapped off. Either way, thanks for the help etc even in spite of the fact that this was a hard one to diagnose remotely.

[copiertec]

Re: Mx-c312 prints light on left side

You never went out to look at the MFP, you just diagnosed over the phone, then had the customer bring it to your location? I think your first problem was to diagnose it without even looking at it.