blank copy on mpc 3001

[ccchuah]

mpc 3001 print out blank copy either black or color.
replaced all high tension board for pcu bias and itb, controller board, bcu, io board,
itb contact motor also have been replaced, still the same problem.
anybody have any idea over this type of problem, please advice...

[davel]

Re: blank copy on mpc 3001

Laser shutter?

[ccchuah]

Re: blank copy on mpc 3001

no shutter for this model

[anothertech]

Re: blank copy on mpc 3001

Make a color copy with lots of coverage, stop the copier during the run, just open the door while it's running. Look to see if you have any toner image on the ITB belt, if no then look to see if you have image on the drums.

[slimslob]

Re: blank copy on mpc 3001

Laser machines use a write to no charge function. Blank pages are either the laser is blocked, development units are not turning or a transfer problem, possibly the PTR.

[ccchuah]

Re: blank copy on mpc 3001

neither the drum or itb have image on it.
laser unit have been replaced, neither color or mono have image, the motor all turning and no code was displayed

[Mark Bbb]

Re: blank copy on mpc 3001

look for the latest SC codes in sp mode

[frere]

Re: blank copy on mpc 3001

Hi,

Just unscrew a little bit the charge on the black PCU to get no charge on the drum, this will normaly make a black copy .Or stop the copying by opening the front door, and have a look on the black drum; If there is no toner at all on the drum that means there is no voltage on the developer roller or there is no ground
for the drum.

[ccchuah]

Re: blank copy on mpc 3001

Just replaced the yellow pcu unit, the print comes back already either in mono or color.

[CopyBats]

Re: blank copy on mpc 3001

Did you engage the pressure on the ITB Unit?

[ccchuah]

Re: blank copy on mpc 3001

The front cover won't closed if the pressure lever not engage, anyway thanks for the information, the problem was solved.

[anothertech]

Re: blank copy on mpc 3001

Just replaced the yellow pcu unit, the print comes back already either in mono or color.

So, what is the working theory for this fix? Maybe the yellow charge arcing and loading down the high voltage?

[ccchuah]

Re: blank copy on mpc 3001

So, what is the working theory for this fix? Maybe the yellow charge arcing and loading down the high voltage?

The magnetic roller is arching to the machine body causing failure of all high tension supply