[Misc] Kyocera Taskalfa 2551 back of the printed sheet is dirty

[Casian55]

Hi everyone, I have this problem on a kyocera taskalfa 2551, the first few prints or copies are dirty on the back of the printed sheet. The first one is really evident, with the second one the smudge starts fading until the problem is gone. Everytime I turn on/off the machine, it starts all again.
I'm pretty sure the problem is due the transfer roller, but I've already tried to replace it..I've tried everything, changing: drum, developer, transfer belt, fuser and even toner cartrige...I'm going mad, please help!

You can see the back of the 1st and 2nd sheet attacched below.

[Phil B.]

Re: Kyocera Taskalfa 2551 back of the printed sheet is dirty

Hi everyone, I have this problem on a kyocera taskalfa 2551, the first few prints or copies are dirty on the back of the printed sheet. The first one is really evident, with the second one the smudge starts fading until the problem is gone. Everytime I turn on/off the machine, it starts all again.
I'm pretty sure the problem is due the transfer roller, but I've already tried to replace it..I've tried everything, changing: drum, developer, transfer belt, fuser and even toner cartrige...I'm going mad, please help!

You can see the back of the 1st and 2nd sheet attacched below.

have you CLEANED the paper path before replacing parts?

did you use USED parts?

[Casian55]

Re: Kyocera Taskalfa 2551 back of the printed sheet is dirty

have you CLEANED the paper path before replacing parts?

did you use USED parts?

Yes, cleaned the paper path and I've replaced with used parts from another machine which has no problems.

[rvptor]

Re: Kyocera Taskalfa 2551 back of the printed sheet is dirty

Remove the Transfer Belt. You will see a black plastic attached to it with a single screw. Unscrew that screw, below you should see a pair of springs and a "unit" with another screw. Unscrew that screw and to the right, unscrew the cables from the tray and remove the small spring that keeps the "unit" attached to the belt. You'll see, Cleaning Blade on that unit. Clean the waste toner with a vacuum cleaner and clean the blade. When you get everything back in place, clean the transfer belt with cotton. If you see that it has physical damage, replace it.

[Phil B.]

Re: Kyocera Taskalfa 2551 back of the printed sheet is dirty

Yes, cleaned the paper path and I've replaced with used parts from another machine which has no problems.

he is having it on duplex prints... my bet is build up on pressure roller

[Ropariva]

[tech07]

Re: Kyocera Taskalfa 2551 back of the printed sheet is dirty

I'd go with a new transfer belt also

[blackcat4866]

Re: Kyocera Taskalfa 2551 back of the printed sheet is dirty

I'd go with a new transfer belt also

TASKalfa 2551ci parts pipe transfer cleaning assy

Usually its too late to clean the transfer belt cleaner by the time you see the streaks. Were it me, I'd order up the transfer belt assy and the spout before heading out. The spout has either a broken gear or a blockage that will continue to back up into the belt cleaner until it's fixed.

=^..^=

[Casian55]

Re: Kyocera Taskalfa 2551 back of the printed sheet is dirty

TASKalfa 2551ci parts pipe transfer cleaning assy

Usually its too late to clean the transfer belt cleaner by the time you see the streaks. Were it me, I'd order up the transfer belt assy and the spout before heading out. The spout has either a broken gear or a blockage that will continue to back up into the belt cleaner until it's fixed.

=^..^=

As I sayed before, I've already tried to replace the transfer belt, also tried to replace the transfer cleaning pipe..no changes.
I'M SURE that the back of the sheet is stained by the transfer roller. It gets loaded with toner, then after one full rotation of the roller, it is deposited on half of the back of the sheet.
Even replacing it doesn't change anything, maybe there's a problem with then transfer roller cleaning process?

[kyogenius]

Re: Kyocera Taskalfa 2551 back of the printed sheet is dirty

TASKalfa 2551ci parts pipe transfer cleaning assy

Usually its too late to clean the transfer belt cleaner by the time you see the streaks. Were it me, I'd order up the transfer belt assy and the spout before heading out. The spout has either a broken gear or a blockage that will continue to back up into the belt cleaner until it's fixed.

=^..^=

please if u need help try what he has said ...i have seen this problem and thats how u get it solved. its not your transfer roller as you are suspecting but transfer belt assy or the unit that moves your waste from trnsfer belt to waste toner box

[sparkycivic]

Re: Kyocera Taskalfa 2551 back of the printed sheet is dirty

that's the distinctive mark of transfer belt cleaning assy filth, especially using old firmware. Newer firmware still does it, but it's different, and usually only the density calibration marks left on the back of page following self-calibration cycle, and also occasional "fingerprint marks" of dropped toner lets you know teardown/cleaning time is near.

Ensure that you're using the latest firmware as there have been updates to the behaviour of the transfer belt and cleaning drive which helps to reduce this effect.

The belt gets filthy for several reasons:
1: this is an unfortunate reality for this whole engine series.
2: the user has been printing heavy coverage.
3: the environment experiences higher than average humidity.
4: the toner isn't genuine.
5: the auger inside the belt cleaning section is broken.
6: the drive gear of the auger in the belt cleaning section is spinning on it's shaft.
7: the transfer pipe assy at the front corner of the machine has failed and the waste cannot escape the belt cleaning section.There will be a lot of brown filth resting on top of the yellow developer to indicate this.

you can clean out and inspect the belt cleaning section, but it won't last as long as installing a new belt... you decide which is cheaper. For me, cleaning time is cheaper than new belts, unless it's far from home.

update your firmware to a recent version, and see what happens.

[Santander]

Re: Kyocera Taskalfa 2551 back of the printed sheet is dirty

If the problem is on the "backside" of the print/copy I doubt it could be the transfer belt or cleaning auger for the transfer belt. Those problems which I have seen too many of deposit the errant toner on the belt that then gets transferred to "front' side of the page. In my mind the only way you can get the backside dirty is by the secondary transfer roller on the door being contaminated
with toner dust, especially prevalent when non-OEM toner is used. Remember the backside of the paper never touches the transfer belt only the front side.

[KYO_OEM]

Re: Kyocera Taskalfa 2551 back of the printed sheet is dirty

If you get same issue with other belt/ new belt, i think we must talk about missing cleaning voltage from HVU-2 PWB.
Remove left cover, unscrew 4 screws from PWb mount and check if ITB contacts for oxidation and correct fitted connector.
Additionally you can open the conveying unit, use a piece of paper for the safety switch and run calibration by systemmenue.
Watch the turning belt and maybe you will see some dust on it.
If we are missing the cleaning voltage, brush needs too long time for removing remaing toner.
You also can switch off U464/ Permission/ Calib for testing, in this case your background will not appear, i hope.....
Don`t forget YC 7 on engine pwb at least, but i hope for you that it`s not needed...

[Casian55]

Re: Kyocera Taskalfa 2551 back of the printed sheet is dirty

If the problem is on the "backside" of the print/copy I doubt it could be the transfer belt or cleaning auger for the transfer belt. Those problems which I have seen too many of deposit the errant toner on the belt that then gets transferred to "front' side of the page. In my mind the only way you can get the backside dirty is by the secondary transfer roller on the door being contaminated
with toner dust, especially prevalent when non-OEM toner is used. Remember the backside of the paper never touches the transfer belt only the front side.

Exactly, I've already tried anything, including replacing the transfer belt.

[Casian55]

Re: Kyocera Taskalfa 2551 back of the printed sheet is dirty

If you get same issue with other belt/ new belt, i think we must talk about missing cleaning voltage from HVU-2 PWB.
Remove left cover, unscrew 4 screws from PWb mount and check if ITB contacts for oxidation and correct fitted connector.
Additionally you can open the conveying unit, use a piece of paper for the safety switch and run calibration by systemmenue.
Watch the turning belt and maybe you will see some dust on it.
If we are missing the cleaning voltage, brush needs too long time for removing remaing toner.
You also can switch off U464/ Permission/ Calib for testing, in this case your background will not appear, i hope.....
Don`t forget YC 7 on engine pwb at least, but i hope for you that it`s not needed...

I'm going to try this procedure on Monday, thanks for now.