MP5000 - dirty scannig and copying but printing fine

[skynetto]

Hello guys, first post here so be nice

Have searched anywhere on the forum but haven't find the solution. So here is the problem.
We have a MP5000 at one of our clients and they have persistent problem after they have broken the ADF exposure glass (it has been replaced).
The first 10 minutes in the morning the machine works fine. Next and for the whole day if the copies and scanning to folder is dirty but it seems like elettrical or condense dirty, it's not coming thry oprics. Thing that we have changed to eliminate the problem are:

ADF exposure glass
Exposure lamp
Stabilizer - CS (part code AZ50 0070)
Scanner I/O Board - Color (part code D011 5350)
Update Firmware to latest (all of them)
After all this nothing changed. We know it's not the printing part because in every moment we send a print job it's just fine.

Any clues why is this happening couse we've reached at a dead end.

Thanks in advance

[rsyarcia]

Re: MP5000 - dirty scannig and copying but printing fine

is scanning and copying on the platen glass ok? how does the image looks like when you copy and scan from the adf?

[skynetto]

Re: MP5000 - dirty scannig and copying but printing fine

Scanning or copying by adf or exposure plate makes no difference its always dirty. Now that i'm thinking a slighty difference is. The gray spots that appears on each copy are different if you copy on adf compared to platen glass. On exposure glass we have more gray spots. By gray spots i mean the background that is not white but have these spots of dark.
I'll attach an image tomorow (don't have a decent scanner right now)

[sharpmind]

Re: MP5000 - dirty scannig and copying but printing fine

I have encountered the same problem in this model. Printing is ok but in copying is bad. There are two reasons why this problem is happening.

1. The scanner section (whole assembly)is not level. You said the exposure glass is broken which means a heavy load is being introduced in the scanner section of the machine that causes it to go down a little bit.
2. the connector board is defective (D009 5380).See attached imageconnector board.jpg

[skynetto]

Re: MP5000 - dirty scannig and copying but printing fine

Have to check that on monday, thanks a lot.

[Masterchief]

Re: MP5000 - dirty scannig and copying but printing fine

I would be very interested to see an image myself, have you cleaned all the optics / mirrors fully. I noticed you mentioned the glass broke and was replaced, Have you checked for glass particles and made sure the mirrors are not scratched.

What about the ARDF when you lift it up, is there any tip ex marks on the rollers or guides on the left side underneath. If there are any marks here it can cause many spots / lines on copies

Let me know how you get on

[skynetto]

Re: MP5000 - dirty scannig and copying but printing fine

Have cleaned optics almost 20 times, ADF is fine there's no mark of rollers ecc. However here is a picture of what is happening. The first page is a clean one, (the copier was cold and offpower all night). As I said earlier the copier scans and copies fine the first 10 minutes of work (as you see on the first page). Than it begans doing these dark spots as you see in the second and the third page. There are uglier but my scanner somehow eliminated some dark from the image.

By broken ADF exposure glass I mean this kind of broken (see attached image). Have removed all glass pieces and no mirrors seems damaged.

[Bantams]

Re: MP5000 - dirty scannig and copying but printing fine

Not only have they Broken the ADF Exp Glass but my guess would be they have twisted the scanner check that the ADF is sitting correctly by lining up the adf with the cut out on the scale plate.


Get a spirit level and check the level of the Scanner

[fbkhan3]

Re: MP5000 - dirty scannig and copying but printing fine

Sorry i couldn't properly chew earlier post .. is it MP5000 with color scanner in it?it sounds (4020 ) ADF Scan Glass Dust Check is on,but since you mentioned its same from both ARDF and Exposure Glass that ruled out, I think you should be look forward to get a new CCD,or if you already have then try restoring values to factory default with birth certificate,

let us the know the trick at the end because it's something i never been through,


good luck

[skynetto]

Re: MP5000 - dirty scannig and copying but printing fine

I'm looking forward too, this has become a little tricky, and yes the scanner is a color one. Next news on monday, stay tuned

[Masterchief]

Re: MP5000 - dirty scannig and copying but printing fine

Hi, and thanks for the pictures, the spots and marks are not constant and this would leave me to think that its something else. what i would do is

• Print off a full SMC report and write down the network settings, There not always lost after format
• Formaat the HDD / it helps
• Try do a copy and see the results if no change continue.
• Remove the developer unit and inspect the mag rollers make sure there is no spots on them
• Clean the Charge grid fully and change the corona wire
• Replace the brush and blade in the Drum unit and hoover out recycling unit.
• The Transfer Cleaning section should also be removed and cleaned, remove the screw and clean the bushings and contacts. I have seen these cause similar problems when not cleaned properly

If this was me, this is what i would i do and if you have a cleam complete drum unit bring it with you or if you have another machine close by and has good copy quality use its parts, as its trial and error. I have seen this sort of problem before where prints are fine but copies are terrible and it has been the factory settings are of and dev bias not correct etc. I have given a list of things to do above and if none of these work, well them im shooting myself in the foot for making you do all this work. I can trust my gut on this one but that one of the above will solve this... as them spots etc are not the same on every copy.

Masterchief

[skynetto]

Re: MP5000 - dirty scannig and copying but printing fine

Thanks all of you for the suggestions. I went today to my client and as I was on the way I was thinking about of why the machine works the first 10 minutes. Than I thought: sure it works it was cold. So the first thing I've done was removing the plastics to the left and right from the machine and told the client to call me if the problem was gone away in an hour, and went away. Two hours later i've receved the call and the machine was working fine in scanning and copying. So I think the problem is solved. Had to go tomorrow to move the machine in another place were it can have more ventilation and replace/clean all the fans. (there's a small fan under the ccd also).
What do you think, may I be right?
My results were: the machine got hot, there's not too much ventilation and there's was condense formed on the optics. Maybe it's time to buy a heater B229 1688 (Heater:Option:230V:9W)

[Bantams]

Re: MP5000 - dirty scannig and copying but printing fine

Get the Heater its pretty Cheap anyway and run the Optics Fans in output mode to make sure they are working.