I series premature fuser failure

[Konicatech]

I have changed countless fusing units on these machines (c250i and c300i) all because the toner was rubbing off the page.


Anyone else experiencing this? If so do you have a fix rather than replace the fuser?

I have tried bumping the temp up by 10 deg which sometimes works for a while and others it doesn't.

Know someone mentioned fuser smart control before but don't know what that does exactly so have left it alone.

Seems like these units fail randomly, 50k or 300k who knows..

[KMFLT3CH]

Re: I series premature fuser failure

Depends on if you're using genuine toner or aftermarket. I've had dozens of i-series fusers fail prematurely even with genuine toner. If toner smears off the page I do the following first:

Disable smart fusing control
Increased fusing temp +10 across the board
Set fusing transport speed to 0

That works about 50% of the time, you might get another 6 months out of the fuser. If it still smears toner after those settings, replacing the fuser fixes it.

However I've had a couple instances where the customer was using bad toner and was still seeing terrible fusing issues after all the above settings and a new fuser.

Finally replaced DV unit, vacuumed sub hopper of Katun toner and put a genuine Konica toner in device and have not returned since. Only seen this twice, majority of the time it's just crap fusers that don't make yield.

[Radiscar]

Re: I series premature fuser failure

To prevent issues I've change the sleep/energy savings and tried to manage poor power with power filters but I've never had to replace a konica fuser yet due to toner not setting -bearings making noise or scratches get them first -they start to jam/wrinkle paper before anything else.

1	Paper Setting	The paper to be used for printing does not match the paper type and size of paper setting selected on the machine.	YES	Make the paper setting again on the machine.
2	Image check: Poor fusing performance	Select [Service Mode] -> [Test Mode] -> [Halftone Pattern]. Select "SINGLE", "HYPER", "Error diffusion", "1-Sided", "Black(1PC)", and "Full Bleed", enter "64" for Density, and load tray 2 with A3 paper. Press the start key. This runs a print cycle. Check the image after printing and the abnormal image is evident.	YES	Go to the next step.
3	Image check: Poor fusing performance	Select [Service Mode] -> [System 2] -> [Smart Fusing Control] and select [Prohibit]. Check the image after printing and the abnormal image is evident.	YES	Return the setting to the original one and go to the next step.
4	Image check: Offset	Select [Service Mode] -> [Test Mode] -> [Gradation Pattern]. Select "SINGLE", "HYPER", "Error diffusion", "1-Sided", "8 Color", "Front Half", and "12 gradations", and load tray 2 with A3 paper. Press the start key. This runs a print cycle. Check the image after printing and the abnormal image is evident.	YES	Go to the next step.
5	Service Mode -> Fusing Temperature	Select [Service Mode] -> [Machine] -> [Fusing Temperature] and make the necessary adjustment, and the image trouble is eliminated. * Poor fusing performance: Decrease the setting value * Offset: Increase or decrease the setting value	NO	Return the setting value to the original one and go to the next step.
6	Fusing unit	There is dirty or foreign matter on paper path of fusing unit.	YES	Clean. (Disassembling the fusing unit is prohibited.)
7	Fusing unit	Scratches on belt or roller in fusing unit.	YES	Replace the fusing unit.
NO	Replace the power supply of fusing.

[avecosat]

Re: I series premature fuser failure

Depends on if you're using genuine toner or aftermarket. I've had dozens of i-series fusers fail prematurely even with genuine toner. If toner smears off the page I do the following first:

Disable smart fusing control
Increased fusing temp +10 across the board
Set fusing transport speed to 0

That works about 50% of the time, you might get another 6 months out of the fuser. If it still smears toner after those settings, replacing the fuser fixes it.

However I've had a couple instances where the customer was using bad toner and was still seeing terrible fusing issues after all the above settings and a new fuser.

Finally replaced DV unit, vacuumed sub hopper of Katun toner and put a genuine Konica toner in device and have not returned since. Only seen this twice, majority of the time it's just crap fusers that don't make yield.

+1 and I have a similar problem in 8 series

[tsbservice]

Re: I series premature fuser failure

* Poor fusing performance: Decrease the setting value
Interesting

[Gift]

Re: I series premature fuser failure

* Poor fusing performance: Decrease the setting value
Interesting

* Poor fusing performance: Decrease the setting value
* Offset: Increase or decrease the setting value

Yeah that's funny^^

[kingarthur]

Re: I series premature fuser failure

We've stopped using aftermarket K toners for C450i series, as it's causing problems. the suppliers of that toner said to reduce fuser temp by -20, fuser speed by -20, set warm up to mode 4 - it helps a little, but some still have problems. it only seems to be K toner

[KMFLT3CH]

Re: I series premature fuser failure

* Poor fusing performance: Decrease the setting value
Interesting

Yeah that is odd, I am seeing the opposite in the service manual. I've personally tried -20 and it was worse than +10

iseriesfusingtemp.JPG

[tsbservice]

Re: I series premature fuser failure

Yeah that is odd, I am seeing the opposite in the service manual. I've personally tried -20 and it was worse than +10

[ATTACH=CONFIG]61316[/ATTACH]

I think SM is messed
From same manual came this:
Screenshot 2024-01-26 144850.jpg

[KMFLT3CH]

Re: I series premature fuser failure

I think SM is messed
From same manual came this:

Now that is funny!

[tsbservice]

Re: I series premature fuser failure

I have changed countless fusing units on these machines (c250i and c300i) all because the toner was rubbing off the page.


Anyone else experiencing this? If so do you have a fix rather than replace the fuser?

I have tried bumping the temp up by 10 deg which sometimes works for a while and others it doesn't.

Know someone mentioned fuser smart control before but don't know what that does exactly so have left it alone.

Seems like these units fail randomly, 50k or 300k who knows..

This came from cra*p heating roller temperature sensor(TEMS) Konica put in fusers. They said to replace fuser
BTW there is new fusing unit for Eagle 2.

[SmellsHot]

Re: I series premature fuser failure

We've had quite a few of them with this issue. Most of the time the fuser fixes the issue, but we've had a handful where just the top and bottom inch of the paper won't fuse and ended up having to replace the expansion control board. You can watch the temp on the outer edge fall well below value when testing. I series have been a big issue for us lately.....damn quality control during the backorder pandemic

[femaster]

Re: I series premature fuser failure

There is a previous thread on the subject here that you can skim through:
C250i fusing problem

Check out my post in the thread here which has a few bulletins on the subject:

https://www.copytechnet.com/forums/konica-minolta/170499-c250i-fusing-problem-2.html#post2504035

[tsbservice]

Re: I series premature fuser failure

Now that is funny!

Traced manuals back to 4e - same mistake

[4Toon]

Re: I series premature fuser failure

Engine Sw have things to try if you want. The way the manual read is No. 6 SW should be set to "on" if you are not in japan but then talks about EU so not 100% on that. I like SW 26, if that does not work 44 and 57 could be tried. Also 24 but would change the sleep timer customer might not like that and chances of noises on that one.