Poor Copy Quality (MP 4000B)

[sharpmind]

Attached are the sample photocopies from the machine.In picture (1a) you will notice that there are dotted lines.That is the photocopy before I start troubleshooting the machine.I cleaned all the optical elements but still no luck.So I tried to reseat the connectors in the sensor board unit. When I switch on the machine and make a photocopy the output is totally poor as shown in picture (2a).Any ideas on this problem?Is it in a sensor board unit?The machine has a total counter of 383454 copies.Print out of the counter list is fine and the machine is just a basic copier.
pic a (1).jpgpic a (2).jpg

[vargue]

Re: Poor Copy Quality (MP 4000B)

it seem to me laser problem it's happens to me many times in other machine first time happened counter paper very good but from scanner it's revealed like that .replace laser unit.also s.b.u.cause this thread

[jonezy999]

Re: Poor Copy Quality (MP 4000B)

I would have thought a bad laser would cause the same fault whether print or copy. It looks as though a connector may not be seated correctly in the ADF or a wire has been pinched somewhere. Do the symptoms change between ADF and glass copies?

[fbkhan3]

Re: Poor Copy Quality (MP 4000B)

Question didn't properly chew up,he said counter list print is good,mean we can rule out the laser, It could be anything starting from CCD to I/O to Controller,firmware,Memory step by step.

[mrwho]

Re: Poor Copy Quality (MP 4000B)

If you can't find what's wrong and when you're about to give up, try to do an All Memory Clear (make sure you've got the SMC handy in case you need to reenter any values). I've solved some odd problems with this procedure, but I just recommend it when you've got nothing to lose (or you're about to start replacing some expensive boards).

[Llama God]

Re: Poor Copy Quality (MP 4000B)

This is a laser fault in the same way that the original Death Star was a moon.

Routine maintenance solves 95% of faults on these machines, although there dev problem still exists. The dots, I would say, are charge roller related, and the other lines are bad grounding or somesuch on the PCU.

I'd start by servicing the machine, by which I mean drum, blade, charge roller, dev, transfer belt and blade, then see what the score is. At 400k this is long overdue if it hasn't already been done (the scheduled PM is at 160k for these boxes.)

What sort of potato did you use to take the photos, by the way?

[Bantams]

Re: Poor Copy Quality (MP 4000B)

So 1a was before you removed the connectors from the Board and re plugged them back in?

Copies in 1a are Crap anyway so it does need a Full Service as Llama suggests

However before doing that you need to get the copies in 2a back to the same standard as 1a before you go any further Un Plug the machine and remove all the connectors you removed and check for bent pins and carefully (Whilst the power is UN Plugged) re seat all the connectors.

[Shadow1]

Re: Poor Copy Quality (MP 4000B)

Dude, either you got a really crappy camera, or really bad CQ. Looks like it was taken with a camera anyway. Don't you have a scanner... um... like, you know... the one built into the machine?

Ok - enuff bustin' your ballz. ;-)

I'm going to +1 everything that was said here already: Check the connections, Reset the NV Ram (print a birth certificate first SP5990-001), PM the machine - but first...

Check to make sure they have the right toner in it. I know the counter sheet is sort of OK, but these machines do something slightly different between copy and print. Haven't figured out what yet, but seen it so many times where print is acceptable, and copy sux. A PM usually fixes it, but I've also seen somebody put Canon toner in one of these and ended up with something like (b). It doesn't take much to contaminate the dev, and it will never purge itself, so if that's the case make sure you disassemble the PCU and clean out the recycle auger as well.

Long shot, but something else to add to the list, and if it's right will save you a second developer change.

[sharpmind]

Re: Poor Copy Quality (MP 4000B)

I would have thought a bad laser would cause the same fault whether print or copy. It looks as though a connector may not be seated correctly in the ADF or a wire has been pinched somewhere. Do the symptoms change between ADF and glass copies?

Whether ADF or platen glass the photocopy is totally bad .I can say that the laser unit is good since the print counterlist is fine with no lines or dots at all.

[sharpmind]

Re: Poor Copy Quality (MP 4000B)

So 1a was before you removed the connectors from the Board and re plugged them back in?

Copies in 1a are Crap anyway so it does need a Full Service as Llama suggests

However before doing that you need to get the copies in 2a back to the same standard as 1a before you go any further Un Plug the machine and remove all the connectors you removed and check for bent pins and carefully (Whilst the power is UN Plugged) re seat all the connectors.

Pic (1a) is the sample copy before check-up.Then I started cleaning the optics and the drum section of the machine.Also, few months ago I replaced the drum, charge roller, brush roller, cleaning blade, developer,transfer belt and transfer blade. It just make 50,000 copies after that replacement period. To erase any doubts, I cleaned it again. Then I make a photocopy but same result.So I go to another step and that is removing and putting the connectors back in the SBU. When I check the sample copy, the result is pic (2a).I reseat the connectors several times but same problem. I was not able to bring back the previous copy quality (pic1a).

[sharpmind]

Re: Poor Copy Quality (MP 4000B)

Dude, either you got a really crappy camera, or really bad CQ. Looks like it was taken with a camera anyway. Don't you have a scanner... um... like, you know... the one built into the machine?

Ok - enuff bustin' your ballz. ;-)

I'm going to +1 everything that was said here already: Check the connections, Reset the NV Ram (print a birth certificate first SP5990-001), PM the machine - but first...

Check to make sure they have the right toner in it. I know the counter sheet is sort of OK, but these machines do something slightly different between copy and print. Haven't figured out what yet, but seen it so many times where print is acceptable, and copy sux. A PM usually fixes it, but I've also seen somebody put Canon toner in one of these and ended up with something like (b). It doesn't take much to contaminate the dev, and it will never purge itself, so if that's the case make sure you disassemble the PCU and clean out the recycle auger as well.

Long shot, but something else to add to the list, and if it's right will save you a second developer change.

I would say toner is not the issue since we are the one who provide toner for the client.The client's machine is under lease.

[mrwho]

Re: Poor Copy Quality (MP 4000B)

If the copy comes out at 300dpi and the printout comes out at 600dpi, then the laser could be outputing badly at 300 and without problems at 600 - there's at least a possible explanation for the laser giving good results while printing and bad results while copying.

Does the defect on the copy occupy the whole page? Or does it have the white border all around it?

If whole page > Not an optics problem
If has border > Could be an optics problem

[sharpmind]

Re: Poor Copy Quality (MP 4000B)

This is a laser fault in the same way that the original Death Star was a moon.

Routine maintenance solves 95% of faults on these machines, although there dev problem still exists. The dots, I would say, are charge roller related, and the other lines are bad grounding or somesuch on the PCU.

I'd start by servicing the machine, by which I mean drum, blade, charge roller, dev, transfer belt and blade, then see what the score is. At 400k this is long overdue if it hasn't already been done (the scheduled PM is at 160k for these boxes.)

What sort of potato did you use to take the photos, by the way?

I just used my mobile camera.hahaha..Sorry guys, I am just a poor man. I cant afford to buy android phones..hahahaha.I am not able to scan it due to lack of time.I could not go to other client's location just to scan it so I use my mobile camera just to post this problem immediately.

[sharpmind]

Re: Poor Copy Quality (MP 4000B)

If the copy comes out at 300dpi and the printout comes out at 600dpi, then the laser could be outputing badly at 300 and without problems at 600 - there's at least a possible explanation for the laser giving good results while printing and bad results while copying.

Does the defect on the copy occupy the whole page? Or does it have the white border all around it?

If whole page > Not an optics problem
If has border > Could be an optics problem

I try to reduce the pic (2a) and the black image gets reduced. The half of the paper is clean.

[Oze]

Re: Poor Copy Quality (MP 4000B)

Pic (1a) is the sample copy before check-up.Then I started cleaning the optics and the drum section of the machine.Also, few months ago I replaced the drum, charge roller, brush roller, cleaning blade, developer,transfer belt and transfer blade. It just make 50,000 copies after that replacement period. To erase any doubts, I cleaned it again. Then I make a photocopy but same result.So I go to another step and that is removing and putting the connectors back in the SBU. When I check the sample copy, the result is pic (2a).I reseat the connectors several times but same problem. I was not able to bring back the previous copy quality (pic1a).

So before you reseated connectors the CQ was pic(1a) and AFTER reseating connectors it looked like Pic(2a)?
I'd +1 to whoever mentioned a bent pin.