MPC7500 Extreme Toner Drool

[Shadow1]

From Good copies to this in seconds. Doesn't feel thermographed like it was way overtoned, and the toner clutch is not stuck(as far as I can tell) Machine is still technically under PM, but it is a print shop so that's my first step. Anybody got any other ideas?
Color: 246705
Black: 67449

[KopyKat]

From Good copies to this in seconds. Doesn't feel thermographed like it was way overtoned, and the toner clutch is not stuck(as far as I can tell) Machine is still technically under PM, but it is a print shop so that's my first step. Anybody got any other ideas?
Color: 246705
Black: 67449

What happened in those seconds or did the customer not tell you?

Honestly, I haven't a clue.

But it's a very lovely sort of sand in the surf pattern.

My best guess would be something within the Black DV unit. Sorry for being useless on this but would love to know the solution when you find it...and you will!

[Shadow1]

I was standing there working on one of their Pro1356Ex machines - looked back through the output tray, and that started between jobs, so I have no idea how long it actually was, but the last page of a one job was fine, and the first page of the next had blops and it got real bad real quick.

There was a tech bulletin about toner drips, but the machine is not within the serial# range to be susceptible. Like I said, I'm going to start with a good PM maybe I'll find something

[thekeg19]

Check black PCU, is it dumping? Check TSB-1 re: toner leakage, I've replaced toner clutches on the B132 not so much on these, good luck.

[Scott_Lewis]

From Good copies to this in seconds.
.....
Color: 246705
Black: 67449

Guessing this a picture of a blank page/scan.

My first thought would be a blown power pack, probably charge. Something shorting out in the charge circuit.

[stephend]

I'll suggest to start a premature PM on this one
Check the dev unit and all the seals in the PCU unit.

[Vulkor]

Looking forward to hearing what fixes this.

[Shadow1]

I believe I have the machine fixed, but I'm at a total loss as to what caused this to begin with.

The developer was more than 50% missing. Toner without carrier doesn't stay put very well and promptly got barfed into the machine, hence the image at the start of this thread. (yes, it was supposed to be a blank page other than the purple text at the bottom - sorry, should have said that to begin with)

There was no carrier in the cleaning station or the ITB, but there was a thin layer of pure black on the top of the waste toner bottle. I PM'd the Black PCU and ITB, and the machine seems to be doing just fine (after the usual initialization problems)

The question remains: what caused the developer unit to be half empty - especially if it didn't get sucked out onto the drum or ITB. It can't even reach the Purge Auger unless it's full...

The only theory I have is that for some reason the machine decided to add a massive amount of toner (the toner bag was nearly empty) which allowed the developer to spill into the purge, then the level went down as toner was puked out of a very thin developer mixture onto the image belt as it was creating my "toner sandstorm" copies.

Toner Clutch seems O.K., ID sensors are clean, seals are good. The moon is aligned with Venus, but that's not a problem since the machine sits at a 12 degree angle to the sun - just checking if you were paying attention.

Anybody got any ideas. I really don't want to come back and have to troubleshoot this again without a good theory as to what happened - y'all know what a booger these PCU's are to rebuild.

[trc]

[stephend]

The moon is aligned with Venus, but that's not a problem since the machine sits at a 12 degree angle to the sun - just checking if you were paying attention.

I have a good idea... ship it to the Moon.
Yesterday I helped our preflight techs with 3 of those....especially because all will be sent in my area as "light production" machines...how light I'll see soon. From 3 ...2 of them failed at 3814.
The third one passed all the setup procedure perfect...but It was producing noises worst than a tractor.....noise from the fusing area...Everybody start making jokes that "is too new" and "give it some time to accommodate with the industrial area"...
That the magic MPC 6000....

Now about your machine...if it's working now...perfect..but I'll be prepared with a cleaning motor for black. I had a year ago on yellow a similar situation (not so bad like yours) and after I PM'ed the yellow unit I realized that the cleaning motor was defective too. It was really stressed to clean all that toner and dev...so I replaced and since then it's OK and this phenomenon never repeated again.