KM 4050 light prints and copies on one end

[mantis01]

I have a KM 4050 that is light on one end of the page. I have new oem toner and the drum has less than 2000 pages on it. I am at a loss of what it can be. Thank you

IMG_6257.jpg

[BillyCarpenter]

Re: KM 4050 light prints and copies on one end

What's the page count on the developer? I've had this same problem before and it was the developer needed to be changed.

Here's an example of my problem. Looks the same to me.

doc00054520201209092216.pdf

[mantis01]

Re: KM 4050 light prints and copies on one end

The developing unit was replaced with the drum I did the maintenance kit (Includes DV-715 Developing Unit, DK-716 Drum Unit, FK-715 Fixing Unit, TR-710 Transfer Unit)

[BillyCarpenter]

Re: KM 4050 light prints and copies on one end

Are you having the problem on copies & prints?

Have you cleaned the laser slit glass?

Is there moisture in the paper?

You need to figure out if the problem is in the image formation section or the transfer section. Maybe cut the power off during the the copy process and look at the latent image on the drum.

[mantis01]

Re: KM 4050 light prints and copies on one end

It happens on copies and prints.

I tried turning it off and the latent image looks light on the end of the drum just like the paper (I could not get a good photo of it)


I did wipe down the outside of the laser lens and can not see anything on the outside surface.

The only thing I can think of is that there is something inside the laser module or maybe the laser is getting week.

I could not find instructions to get at the laser module.

[BillyCarpenter]

Re: KM 4050 light prints and copies on one end

The KM-4050 is a very old machine. It was released in 2006. What the total counter? Sounds like a good candidate for an upgrade.

[mantis01]

Re: KM 4050 light prints and copies on one end

the total count is 269817 so it has not bee used that much and last year we put money in it for the maintenance kit. An upgrade is defiantly not in the budget for a copier (especially this year). That is why I was reaching out here.

[BillyCarpenter]

Re: KM 4050 light prints and copies on one end

I should have asked all these questions upfront. My apologies. You said you replaced the maintenance kit.

The 500k kit includes the following:


(1) DV-715 Developing Unit [302GR93034]
(1) DK-716 Drum Unit [302GR93041]
(1) MC-710 Main Charge with Motor [302GR94534]
(1) FK-715 Fixing Unit [302GR93057]
(1) TR-710 Transfer Unit [302GR93281]
(2) Front Registration Guide [2BL16130]
(1) Transfer Guide[302FG93111]
(3) Pickup Roller [2BJ06010]
(2) Feed Rollers [2AR07220]
(3) Separation Rollers [2AR07230]
(1) Bypass Feed Roller [61706770]
(1) Registration Clean [2BL93450]
(1) Under Cleaner Registration [2BL07950

Is that the kit your replaced?

Is it an OEM kit or generic?

Can you tell me every item that was included in the kit?

[mantis01]

Re: KM 4050 light prints and copies on one end

this is the kit I got


I believe it is Genuine, Kyocera

[BillyCarpenter]

Re: KM 4050 light prints and copies on one end

Ok, good. Who knows how long that kit has been sitting on the shelf. I would pull the DV unit and look at the magnetic roller to see if it is coated with developer from end to to end. We know the the problem lies in the image formation section because you saw the void area on the latent image. When you pull the DV unit, shake it real good and see if that helps. Hope that helps.

[BillyCarpenter]

Re: KM 4050 light prints and copies on one end

By the way...are you a tech or an end user? Did you run all the necessary simulations for replacing the PM parts?

[tsbservice]

Re: KM 4050 light prints and copies on one end

I'm not Kyocera specialist by any means but from your image I bet your laser unit poly mirror is dirty. Remove and very carefully open and clean inside especially polygon mirror.

That's if you're presumably already changed drum and dev.

[BillyCarpenter]

Re: KM 4050 light prints and copies on one end

I'm not Kyocera specialist by any means but from your image I bet your laser unit poly mirror is dirty. Remove and very carefully open and clean inside especially polygon mirror.

That's if you're presumably already changed drum and dev.

Thanks for chiming in. Yes, he said he replaced drum and DV. I asked him about the laser slit glass but didn't think about the polygon mirror. It's been a minute since I've seen one of these old machines.

[tsbservice]

Re: KM 4050 light prints and copies on one end

... It's been a minute since I've seen one of these old machines.

Lucky you I never seen one.

[allan]

Re: KM 4050 light prints and copies on one end

Pulling teeth on this one Bill.

So the dev and stuff got changed. And you mention last year or so.. Stuff was in there for some time.

Lift the machine at an angle so the dev can run to that side of the roller. 90 degrees is just to much angle on there. I would say 15 degrees or so.
So get a wooden block and place it under one side of the printer and call it fixed.
Only kidding...

Print 10 pages like that and see if the dev moves. Will not find the stuff i come up with in any manual.

The transition from black to void does not look like laser precision.