KM-3035 Dv Troubles?
Just curious if any of you guys have noticed the dv units on these machines (KM-2530, KM-3530, KM-4030, KM-3035, KM-4035, KM-5035) developing hard rings of toner around the mag. roller that cause light lines on the copies. we've had these machines out for a long time now and in the last year they have started to develop these hard lines and the service call is usually light copies. In some cases these lines will develop in a couple of months and within 30k copies. We replaced the first few it happened to but now I am cleaning these units off (pain in the ass). The best method I have found is to use a dusting cloth to remove all powder toner from the front of the roller and then cleaning the area with sel-sol (rubber cleaner we use for feed tires) but that leaves an oily residue so I go back over it with alcohol on a lent free rag. Then I repeat the process till one whole turn of the mag. roller. has been made.
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Southern Duplicating of Mississippi
PSN: DrAbsurd (if you know you know)
"If you love wealth more than liberty, the tranquility of servitude better than the animating contest of freedom, depart from us in peace. We ask not your counsel nor your arms. Crouch down and lick the hand that feeds you. May your chains rest lightly upon you and may posterity forget that you were our countrymen." [Samuel Adams] -
There were several posts about this but I couldn't find them. 1st check the two filters, 1 in bypass and 2nd behind r/h cover(to the rear of bypass). Make sure the filters are clean. If not heat builds up in the machine causing dv and drum problems. Also check firmware level to make sure it's current. i wouldnt use any chemicals to clean mag roller. Just use a dry cloth and elbow grease. You can take out the dr. blade and clean that also, there's no adjustment. We vacumn out the dv unit when cleaning them to ensure all the toner is removed. If the mag roller has shiny rings where the toner rings were, get rid of the unit. they will just come back.
Hope this helps.....
Also, make sure you are using OEM toner........My mission here on Earth is to help all you Dum-Dums! -
thanks for pointing those filters out man ive never noticed the one in the bypass before. they had a layer of dust on them so that may be the answer i was looking for. and it also explains the time it took for the machines to start having this problem.Southern Duplicating of Mississippi
PSN: DrAbsurd (if you know you know)
"If you love wealth more than liberty, the tranquility of servitude better than the animating contest of freedom, depart from us in peace. We ask not your counsel nor your arms. Crouch down and lick the hand that feeds you. May your chains rest lightly upon you and may posterity forget that you were our countrymen." [Samuel Adams]Comment
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I Have A Fair Number Of These Boxes, Mainly 5035's Doing The Same Thing. We've Cleaned The Filters Religiously, Updated Firmware Constantly And We Still Get The Problem. The 5035's Seem To Be The Most Common One's With The Problem. Two Of These Units Have Had 6 Developer Units Together In Two Years. Even With Cleaning The Mag Rollers And Vacuuming The Dev Unit To Try To Eliminate Paper Dust, Etc. , We Are Still Encountering The Problem. We've Tried To Think Humidity Issues, Heat Build Up Issues, Paper Dust Issues, Air Flow Problems, Etc., But We Continue To See A Pattern Of These Getting Either Grooves In The Mag Rollers Or Raised Areas With Toner Or Some Type Of Contaminant Sticking To The Mag Rollers.Comment
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I don't know if this is pertinent, but some of the 16, 25, 30, & 35 cpm Canons with monocomponent toner did this same thing. For some, it was the Copy Technologies brand toner. On the 16cpm machine, it had a rubber doctor blade which levelled off the toner into the texture of the mag roller. When the rubber blade became rough due to normal wear, it would generate enough heat to partially fuse the toner to the mag roller. Cleaning as described above works, but not for long in either situation. Replacing the developing unit did the trick long term.If you'd like a serious answer to your request:
1) demonstrate that you've read the manual
2) demonstrate that you made some attempt to fix it.
3) if you're going to ask about jams include the jam code.
4) if you're going to ask about an error code include the error code.
5) You are the person onsite. Only you can make observations.
blackcat: Master Of The Obvious =^..^=Comment
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Blackcat you hit the head on the nail the kyocera has a magnetic rubber doctor blade which from heat from friction and the impurities in the monocomponent toner causes the rubber blade to develope nicks and pits in the blade which leaves a ring around the mag roller and over time hardens all we do is replace the rubber blade and the bracket it is glued on and if the mag roller has a slight indent either replace or buff out with a scouring pad or sand paper #000.Get your facts first, and then you can distort them as much as you please.Comment
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Thanks knightfall and blackcat. I've noticed the rubber rectangular blade under the doctor blade mount and when you run your finger over the edge, you can feel irregularities on the surface. It makes sense that the heat from friction can eventually distort and/or damage the surface of this rubber piece. I thought this rubber piece was magnetic and designed to attach impurities, contamination or foreign bodies to it and keep it from blocking the blade itself. But what you say makes sense. Especially since it's more prevalent on the 50 cpm units than the 30 cpm units. Thanks much for your help.Comment
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Knightfall,
Do you have a breakdown of the dev unit so I can order the rubber blade and mount. I just checked my new parts manual and they don't show the individual parts in the section. They want you to buy the entire dev. unit.Comment
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I've attached the dev unit part break down which covers 3035/4035/5035/2530/3530/4030 hope this helps you.Last edited by knightfall; 10-22-2007, 06:55 PM.Get your facts first, and then you can distort them as much as you please.Comment
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Thanks knightfall!If you'd like a serious answer to your request:
1) demonstrate that you've read the manual
2) demonstrate that you made some attempt to fix it.
3) if you're going to ask about jams include the jam code.
4) if you're going to ask about an error code include the error code.
5) You are the person onsite. Only you can make observations.
blackcat: Master Of The Obvious =^..^=Comment
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Thanks again knightfall and blackcat. I am still wondering why the Rev 4 of the parts manual doesn't have the breakdown, but that's one of those things. I checked several dev units we have been examining and the brown colored rubber piece does seem to have a slight magnetic attraction to it. I don't know if it's supposed to be slightly magnetic or it just gets that way thru the tribo charge due to monocomponent agitation. The doctor blades with the damaged mag rollers are really worn and rough surfaced when you run your finger across them.
Again, Thanks.Comment
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Two medicine there is no tribo electric charge which is applied if you have dual component, kyocera miita after all is a company that strives on money and there is more money if they sell you a developer unit as opposed to the metering blade which does have a slight magnetic attraction to hold any large chunks of toner better.Get your facts first, and then you can distort them as much as you please.Comment
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Check the red felt pad that cleans the registration roller. (remove the drum for access). Excessive paper dust is the eventual cause of the damage to the blade on the dev unit. Also this can cause pitting of the drum surface as the charged drum arcs to ground via the paper dust. Changing the brand of paper to a higher quality improves reliability.Comment
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