KM C258 offsetting issue

[UKTeam]

Re: KM C258 offsetting issue

Well its been a while since I posted here, but I still read most weekdays.

I want to jump in on this thread because I have had exactly this, although it was a C224e.
Don't ask me why, because the MFP was in a standard office, not too hot, not too cold, not too humid...etc.
And the issue as you say, shows on the fuller fills.

You are seeing the remnants of a latent Drum image which is not fully discharged.

I managed to cure this by reducing the PRIMARY transfer voltage. (Not secondary..!)

Service Mode - Image Process Adjust - Trans Voltage Fine Adj.
Start by setting all colours to minimum (-8) and gradually bring them back up a step at a time until the image issue re-occurs.
Then simply drop back one step until you are happy.
I believe mine was a mix of -4 and -5.

It will be interesting to know if this helps you, particularly since this is a C258 Direct contact Charge Drum Unit as opposed to the C224e Air charging...

regards,
Mark

[JDR]

Re: KM C258 offsetting issue

Well its been a while since I posted here, but I still read most weekdays.

I want to jump in on this thread because I have had exactly this, although it was a C224e.
Don't ask me why, because the MFP was in a standard office, not too hot, not too cold, not too humid...etc.
And the issue as you say, shows on the fuller fills.

You are seeing the remnants of a latent Drum image which is not fully discharged.

I managed to cure this by reducing the PRIMARY transfer voltage. (Not secondary..!)

Service Mode - Image Process Adjust - Trans Voltage Fine Adj.
Start by setting all colours to minimum (-8) and gradually bring them back up a step at a time until the image issue re-occurs.
Then simply drop back one step until you are happy.
I believe mine was a mix of -4 and -5.

It will be interesting to know if this helps you, particularly since this is a C258 Direct contact Charge Drum Unit as opposed to the C224e Air charging...

regards,
Mark

Looks like you got it !
I had to set all values to -6 to fix this issue.
Does it mean HV board is faulty ?

[UKTeam]

Re: KM C258 offsetting issue

Sorry JDR, had a week off work and missed this...

Firstly, I'm glad this works for you too, and thanks for the feedback.

As for the question "Is the HV PCB faulty", no I don't think so.
Its just some undefined environment issue.
My 224e is just as happy now as it was a couple of years ago when I changed these settings.
Don't worry anymore about it..!

Mark

[Savian]

Re: KM C258 offsetting issue

Well its been a while since I posted here, but I still read most weekdays.

I want to jump in on this thread because I have had exactly this, although it was a C224e.
Don't ask me why, because the MFP was in a standard office, not too hot, not too cold, not too humid...etc.
And the issue as you say, shows on the fuller fills.

You are seeing the remnants of a latent Drum image which is not fully discharged.

I managed to cure this by reducing the PRIMARY transfer voltage. (Not secondary..!)

Service Mode - Image Process Adjust - Trans Voltage Fine Adj.
Start by setting all colours to minimum (-8) and gradually bring them back up a step at a time until the image issue re-occurs.
Then simply drop back one step until you are happy.
I believe mine was a mix of -4 and -5.

It will be interesting to know if this helps you, particularly since this is a C258 Direct contact Charge Drum Unit as opposed to the C224e Air charging...

regards,
Mark

Thank you very much, your post worked excellently. The ghosts desappeared.

[Kannaneact]

Re: KM C258 offsetting issue

Well its been a while since I posted here, but I still read most weekdays.

I want to jump in on this thread because I have had exactly this, although it was a C224e.
Don't ask me why, because the MFP was in a standard office, not too hot, not too cold, not too humid...etc.
And the issue as you say, shows on the fuller fills.

You are seeing the remnants of a latent Drum image which is not fully discharged.

I managed to cure this by reducing the PRIMARY transfer voltage. (Not secondary..!)

Service Mode - Image Process Adjust - Trans Voltage Fine Adj.
Start by setting all colours to minimum (-8) and gradually bring them back up a step at a time until the image issue re-occurs.
Then simply drop back one step until you are happy.
I believe mine was a mix of -4 and -5.

It will be interesting to know if this helps you, particularly since this is a C258 Direct contact Charge Drum Unit as opposed to the C224e Air charging...

regards,
Mark

thq so much

[nitro912gr]

Re: KM C258 offsetting issue

this worked for me too, thank you very much.

The first time it happened I changed drums and it fixed itself but today noticed it again and I barely have the new drums on for a month with very few passes.
In my case C258 too, I only had to go -1 on each color to fix it.

[zoor]

Re: KM C258 offsetting issue

Well its been a while since I posted here, but I still read most weekdays.

I want to jump in on this thread because I have had exactly this, although it was a C224e.
Don't ask me why, because the MFP was in a standard office, not too hot, not too cold, not too humid...etc.
And the issue as you say, shows on the fuller fills.

You are seeing the remnants of a latent Drum image which is not fully discharged.

I managed to cure this by reducing the PRIMARY transfer voltage. (Not secondary..!)

Service Mode - Image Process Adjust - Trans Voltage Fine Adj.
Start by setting all colours to minimum (-8) and gradually bring them back up a step at a time until the image issue re-occurs.
Then simply drop back one step until you are happy.
I believe mine was a mix of -4 and -5.

It will be interesting to know if this helps you, particularly since this is a C258 Direct contact Charge Drum Unit as opposed to the C224e Air charging...

regards,
Mark

Thanks a lot Mark ¡