IMC2000 light blacks

[UNICORNico]

Re: IMC2000 light blacks

In the experience I have with the MP C2xx4 and IM C2xxx series, (None with wax lubrication system) they usually have a rather disappointing mass quality despite the adjustments and changes of image units.
These ranges are not recommended (in the company) for clients who are dedicated to design printing, or similar work, it is a continuous fight with this issue.

[mrwho]

Re: IMC2000 light blacks

Well, I'm back.

This is what I'm chasing:

IMG_20220511_113514.jpg

Notice the black gradation relative to the other colours.

Checked the ITB contacts, now going to try with a new ITB.

[Mark Bbb]

Re: IMC2000 light blacks

Well, I'm back.

This is what I'm chasing:

[ATTACH=CONFIG]53268[/ATTACH]

Notice the black gradation relative to the other colours.

Checked the ITB contacts, now going to try with a new ITB.

Is the image ok on the ITB?

[mrwho]

Re: IMC2000 light blacks

Is the image ok on the ITB?

No

IMG_20220511_122246.jpg

Cleaning laser and new ITB didn't make any difference.

I want to avoid force feeding k toner, because then I will have no idea if the problem is solved or not. I intend to solve it so the machine will adjust itself to the proper levels (assuming it's a lack of k toner).

[mrwho]

Re: IMC2000 light blacks

Just noticed the rear id sensor is erroring out. Going to check it.

[mrwho]

Re: IMC2000 light blacks

Just noticed the rear id sensor is erroring out. Going to check it.

Got away after cleaning. Problem remains. Grrr...

[GIUBOSS]

Re: IMC2000 light blacks

Replace the dev. unit blk as already suggested.

[luca72]

Re: IMC2000 light blacks

Hello there.

Tomorrow I'm going to drive a long way (well - about 150km, it's a small country I live in) to check an IMC2000 with a total counter of around 55k, where the customer complains that the blacks are more gray than black.

I instructed via the phone for him to make a forced toner supply K a couple of times. Quality improved, but soon returned to before.

Besides pcu, what do you recommend? Any cheat sheet you guys have for this situation?

I usually replenish toner and then reinit the td sensor, but I'd love to hear other tips from you.

Cheers!

I had the same problem on an mpc2003 months ago, leaving out, as has been said, and I confirm, that they do not have a deep black of their own, it was too gray there, I replaced the development unit bk, however you do this:
clean the 3 id sensors, clean laser glasses
tap under the development assembly with the screwdriver handle, turn the magnetic roller gear back and forth with your hand, a dozen times, (this help to remove eventualy residue of poweder from doctor blade) and try, if it doesn't satisfy, replace it the dev unit, update the firmware, and only then do the process control (sp 3)

[mrwho]

Re: IMC2000 light blacks

Sorry for the delay. We're still testing, but so far it seems to be the laser unit.

Will keep you posted. Cheers!

[mrwho]

Re: IMC2000 light blacks

Sorry for the delay, I just found out I never gave closure to this thread.

It was indeed the laser unit.

Thank you all for your support.

[tullio]

Re: IMC2000 light blacks

HI. i have the same problem on black. the laser ? Can you tell me what did you clean? Thank you . it's urgent.

[mrwho]

Re: IMC2000 light blacks

HI. i have the same problem on black. the laser ? Can you tell me what did you clean? Thank you . it's urgent.

We replaced the laser unit.

[copier tech]

Re: IMC2000 light blacks

HI. i have the same problem on black. the laser ? Can you tell me what did you clean? Thank you . it's urgent.

It is very rare for the laser unit to fail especially on an IMC device.

I would start by replacing the black PCDU.

[Gift]

Re: IMC2000 light blacks

I think these budget series will, like it's predecessors, always run with a noticeable lighter densitiy compared to IMC3000 and other higher models.

All you can do is keeping the ID sensor and laser clean and replace units if they have exceeded the PM yield and run a paper with a very smooth surface. "Color Copy" paper will improve the quality a lot. Even with new PCDUs you'll notice a certain density degradation after a short period of time - seems the process control has it's own mind.

Things usually got worse in low volume enviroments - if the PCDUs are within yield you can run some force toner cycles and check the density in between. Don't overdo it... If the print looks ok -> re initialize the developers and you are sort of "good to go" for some time.

[mrwho]

Re: IMC2000 light blacks

if the PCDUs are within yield you can run some force toner cycles and check the density in between. Don't overdo it... If the print looks ok -> re initialize the developers and you are sort of "good to go" for some time.

Lately I've been opting for tweaking the "procon target" to increase toner density when customer complains it's too low - raise by 0.01 or 0.02 and then let it run for a while to see how it goes. I've even had one customer say it was too dense - hence I reduced procon target by -0.02 and she was happy.