C250i fusing problem

[tsbservice]

Re: C250i fusing problem

Thanks, but this is what I'm looking for.
[ATTACH=CONFIG]60560[/ATTACH]

Only AliExpress I think.

[B0265]

Re: C250i fusing problem

A7AHM50400 Humidity sensor

Thanks, but this is what I'm looking for.
temp sens.JPG

[Gift]

Re: C250i fusing problem

Thanks for sharing the bulletins @femaster - can't recall we dealt with that yet but who knows what happen in the future.

[elmaligno]

Re: C250i fusing problem

Where do you buy the thermistor/temp sensor?

A7AHM50400 Humidity sensor

[B0265]

Re: C250i fusing problem

Hi Jwai

We had exactly the same problem. We swapped the Belt and Pressure roller and Lamp from working fuser and still black wouldn't fuse and colours were fine.

We replaced the Themistor and seems like it is working now.

Where do you buy the thermistor/temp sensor?

[tech51]

Re: C250i fusing problem

My latest information says to try setting fuser temp to +10 and turning off smart fusing control in Tech Rep.

[femaster]

Re: C250i fusing problem

This is all I can dig up on this subject. I don't believe this has been shared before, so here goes.

Offset image from fusing unit
Known Error

ID: KBA00076421
Related Products:bizhub 300i, bizhub 360i, bizhub 450i, bizhub C250i, bizhub C300i, bizhub C360i, bizhub C450i
Error: Image is offset from fusing unit.

Root Cause
Foreign matter adhered to the surface of the thermistor chip inside the heating roller temperature sensor.
It is highly likely that this occurred because the resistance value decreased.

Workaround/Fix
Confirm the heating roller temperature sensor.

Please review the attached, "How to check for the Heating roller temperature sensor problem" document.
For a counter measure review bullet # 3 in the attached, "Off set image for unit" document.

[avecosat]

Re: C250i fusing problem

We have experienced this problem a few times lately, is there any new information?

+1 Does no one have new information?

[B0265]

Re: C250i fusing problem

We have experienced this problem a few times lately, is there any new information?

[jwai]

Re: C250i fusing problem

Hi Jwai

We had exactly the same problem. We swapped the Belt and Pressure roller and Lamp from working fuser and still black wouldn't fuse and colours were fine.

We replaced the Themistor and seems like it is working now.

Thank you for your great advice, i try to replace thermistor kit and test it.

[NickHilner]

Re: C250i fusing problem

Hi Jwai

We had exactly the same problem. We swapped the Belt and Pressure roller and Lamp from working fuser and still black wouldn't fuse and colours were fine.

We replaced the Themistor and seems like it is working now.

[jwai]

Re: C250i fusing problem

In addition i found, print color page is ok, print black documents mostly have this issue, all toners are genuine.

[jwai]

Re: C250i fusing problem

Not sure for this model but there is firmware for the 8 series addressing this issue mostly for 1st page after coming out of sleep mode.

Have you gone into the service mode and increased the fusing temp?

Aftermarket toner?

I increased fusing temperature to +5 and +10, same result, genuine toner is using.
After print 2 pages , i check fuser side temp. it dropped to 8X degree and than raised to 11X degree.
tested same method on one C224, the temp. stayed on 12X degree.

[copier tech]

Re: C250i fusing problem

I've not had one last life yet, seem to have random blisters happening around the half way mark. Not impressed.

We also have a long wait to get them from KM. They simply tell us 'sorry we don't have an ETA'

Very poor UK dealer support.

[avecosat]

Re: C250i fusing problem

I've had that problem a couple of times on a C250i and I'm trying to get it from KM under warranty.