3051ci Black washout faded areas

[copydocinc]

I am getting what looks like a faded washout area repeating, kind of. It shows better in a blackout, but it also does it in a print job too, not just copies.
I have replaced dev. unit, drum unit, transfer belt and transfer roller. ran the auto laser cleaning a few times, calibration, dev refresh, drum refresh, calibration.
I stopped a copy to show it is happening before the fuser unit and can see it on the transfer belt.
I'm thinking possible altitude adjustment needed, but haven't tried it yet. I have 6 other customers with this model with no problem like this.
I hope you can see it in my sample and can give me some help.sample.jpg

[tsbservice]

Re: 3051ci Black washout faded areas

Waiting for real Kyo experts to solve your issue I have to ask, did you put all those parts brand new or borrowed?

[blackcat4866]

Re: 3051ci Black washout faded areas

It's the black developing roller spacers. And it's so common that you could have easily found another used unit with exactly the same issue. There may be resulting damage to the black drum also. Photos?:

Alphard_Developing_Spacers.jpg

=^..^=

[BillyCarpenter]

Re: 3051ci Black washout faded areas

That pattern looks awfully familiar to what I've seen on 3552ci and the drum was the culprit. But you said that you replaced the drum so....

[copydocinc]

Re: 3051ci Black washout faded areas

It's the black developing roller spacers. And it's so common that you could have easily found another used unit with exactly the same issue. There may be resulting damage to the black drum also. Photos?:

[ATTACH=CONFIG]57839[/ATTACH]

=^..^=

I did leave a photo and it does look similar to your photo sample.
For sure I did use these parts out of another machine, but it was not doing this in the other machine, that I could see.
I'll check it out again to be sure and I will put the parts from the offending machine in my other machine too to compare.

[BillyCarpenter]

Re: 3051ci Black washout faded areas

It's the black developing roller spacers. And it's so common that you could have easily found another used unit with exactly the same issue. There may be resulting damage to the black drum also. Photos?:

[ATTACH=CONFIG]57839[/ATTACH]

=^..^=

That was my first thought but when he said he had replaced the DV unit, I assumed that he replaced with a known good one...be it new or used. I think you're right, though. He replaced DV with another defective unit.

[tmaged]

Re: 3051ci Black washout faded areas

It's definitely the DV unit.

[dalewb74]

Re: 3051ci Black washout faded areas

look at your power source. remove from any power source other than the wall outlet... might not be it, but i have seen bad power do crazy stuff. kinda gives it a static/fuzzy look. and if its on a battery backup.... oh my....

[tsbservice]

Re: 3051ci Black washout faded areas

I did leave a photo and it does look similar to your photo sample.
For sure I did use these parts out of another machine, but it was not doing this in the other machine, that I could see.
I'll check it out again to be sure and I will put the parts from the offending machine in my other machine too to compare.

Bingo, sometimes replacing worn parts with used ones be it even only for troubleshooting is like pissing against the wind (it comes back to bite you ugly).

[blackcat4866]

Re: 3051ci Black washout faded areas

CS-3051ci, 3551ci, 4551ci, 5551ci Alphard II Venus

Black areas (black only or composite black) of 65% or greater fill blank out toward the front of the MFP. Auto color calibration quality diminishes quickly, KM-3051ci, 3551ci.

Black developing issue. Developer spacer becomes worn or cracked.

Replace black developing unit DV-8305K (302LK93014). Perform color calibration.

It can be extremely intermittent. And the built in U089 test pattern can print completely without the quality issue since the bands over 65% fill are only 10mm wide.

[PrintWhisperer]

Re: 3051ci Black washout faded areas

That pattern looks awfully familiar to what I've seen on 3552ci and the drum was the culprit. But you said that you replaced the drum so....

I've seen the spacers chew up the drum surface they ride on so any problem with that connection is plausible. Throw a little developer leak in there and crunch..crunch..crunch.

[kyotechnz]

Re: 3051ci Black washout faded areas

On ones I have seen with this fault I have had to replace both the drum and dev together to fix.
So far for me this fixes the problem.

[tsbservice]

Re: 3051ci Black washout faded areas

It's the black developing roller spacers. And it's so common that you could have easily found another used unit with exactly the same issue. There may be resulting damage to the black drum also. Photos?:

[ATTACH=CONFIG]57839[/ATTACH]

=^..^=

We have some limitations but your help Sir is invaluable.
Thanks for sharing your experience and doing your service for community!

[KYO_OEM]

Re: 3051ci Black washout faded areas

We have had similar cases and mostly new DV solved the problem after running ALL needed adjustments for new dv unit.

I always see pictures and small explanations what would done.
I am sorry to say, but what i learned during >30 years fighting against copier systems/ technical help:
"Never trust a technician"
it is not meant badly, but sometimes something is forgotten or executed incorrectly
The U000 reports of the systems on the other hand do not lie and on the basis of certain values it is possible to analyze the state of the system very well and also find possible errors.
Maybe it`s possible to share U000.txt files taken by USB for further analysing.
Enclosed you`ll find the original bulletin from KDC regarding your problem, but i also have had cases with broken main hv pcb.
New dv didn`t solve the problem and we must mount new hv pcb.
What happens if you shut off Set AC Auto Adj by U100 for analysing only?
System won`t calculate hv voltages anymore, system will work with initial voltages in this case.
it is only for trial, not a permanent solution!