[CQ] Quality problem with mpc3000

[kassa]

Hello,
I've a problem with a mpc3000.
The machine print with a bad quality only picture.
text and other normal things are printed regularly.
The total counter's machine is 180.000 but color only 35.000.
3,000 copies ago, I replaced magenta drum with a modded black drum and the entire image transfer unit with a modded unit of a spc811.
Now to solve the problem I also I've replaced the black drum and black developer but the problem is not solved.
I am attaching sample image to better explain the problem.

01.jpg

Thanks in advance.
By.

[AyJayAreDii]

When was the last time you replaced the PRT roller? also have you been cleaning the ID sensors and making sure the laser slip glass is clean?

[bryand]

First I would try setting SP2-914 1 and 2 to 45ms from the default ( I think 38ms). This will allow the laser shutter more time to open fully. It has cured many light copy issues on these models.

Also low humidity (less than 20%) will also cause washed out copies. We see this on the 811dn printers alot, must have a humidifier near machine.

[kassa]

Thanks for the reply.

@ AyJayAreDii I never repalced PRT roller because the copier have only 180.000 while its replacement is expected to 240.000 . Today I'll try to clean the sensor id, and I'll look the laser slip glass.

@briand I'll try sp 2914 1 and 2 and I'll let you know. I moved the copier from the customer at my office, so I think the humidity is not the cause of the problem.

I forgot to tell you however that I tried to print the test pattern through sp with singol color and everything is ok.
Only when the colors overlap and the machine works in four-color, there is the problem.
Bye.

[kassa]

@ bryand I tried sp2.914 1 e 2 but the problem is not solved.

Other ideas?

[JustManuals]

This Parts & Service manual can be purchased for $12.77 and downloaded immediately after payment from

http://www.justmanuals.com

Paul@justmanuals.com

[TonerMunkeh]

With the general lightness of the print is it not just a driver or application related issue? The print itself seems alright, nothing's missing, there are no lines. Try running a colour test page out of Printer SP and see if that's the same. If not, it's something to do with what it's being sent.

[brodera]

Think you should clean the Shutter Glas with that Blue thingy (Toner on that glas can make prints light in my experiance) and do a force toner supply?

[kassa]

I've cleaned the shutter glass, I tried to print different files from different applications from different PCs, using the latest driver on the Ricoh website but the problem is not solved.

Printer test pattern:

http://imageshack.us/photo/my-images/163/201106091028040720002.jpg/

http://imageshack.us/photo/my-images/850/201106091028040720001.jpg/

[brodera]

ooh man.. This was a tricky one

[Herrmann]

Newest Firmware?
Did you run color adjust under maintenance?

To test if it is a Firmware issue, take out the Laser Assy and remove the Metal Shutter, then put the Laser Assy in and see, what happens.

[dfs]

Check all your PCUs and Dev units & make sure they are all Clean. Have you pulled out the laser unit and cleaned the Glass Slits ? Providing that the laser unit is clean Transfer ID sensors clean run a ACC in usertools (usertools/maintainance). Or you can remove the laser shutter from the laser unit and try printing the job again.

[Fearless V K]

You can leave the laser shutter out of the machine forever with no problems. If I have any issues with them I just trash them. Setting the SP mode to open the shutter more does not always work. You can always clean the slit glasses with the blue rod if they ever get dirty.

Also I have sometimes had to revert the ACC to factory settings because you can get a cumulative effect problem compounding itself with each run of the ACC. (since it uses the previous value of ACC to calculate its settings it can get progressively worse each time you run it.) reset it to factory value in SP modes.

[bryand]

Ok you should check the current environmental display - SP2-013-001 , if it is LL then you have a humidity issue. This means the copier is compensating for the lowest level of humidity. Ive had an 811 with copies that looked exactly like yours (looks like it is not using any black on full color prints). Put humidifier beside machine for 20 min then check that SP code again, once it shows ML your copies should look like they should.

[kassa]

Thanks to everyone for the advice and collaboration.
I have changed from "text priority" to "photo priority" inside PRINTER FEATURES\MAINTENANCE\4 COLOUR GRAPHIC MODE.
I do not know why the customer has changed this setting and still denies having done so, I only know that it was a chance to have found this approach and have tried to change it.
The important thing however is for me to have solved the problem.
Thanks again to everyone.
By.