Kyocera 7002i thick solid black line

[progoffice]

Re: Kyocera 7002i thick solid black line

We also have a 7002i exhibiting this same issue. We're still testing, but we think we've got it figured out. Ran over 3,000 copies without any lines.

The primary cause is a bad drum ground and fixed by replacing the drum drive assembly.

See the attached document that refers to this and another possible cause for this issue. The attachment is from a Kyocera tech rep.

[Necrocannibal]

Re: Kyocera 7002i thick solid black line

We also have a 7002i exhibiting this same issue. We're still testing, but we think we've got it figured out. Ran over 3,000 copies without any lines.

The primary cause is a bad drum ground and fixed by replacing the drum drive assembly.

See the attached document that refers to this and another possible cause for this issue. The attachment is from a Kyocera tech rep.

I will check it out thank you. I don't know why this is such a difficult problem to figure as it seems it happens fairly often. We are doing the bulletin that talks about mylars for transfer belt skew.

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[ShayMoe]

Re: Kyocera 7002i thick solid black line

Brianneoe thought he had got to the source of the problem back in June when he discovered that there was intermittent continuity between the drum shaft and ground and having cleaned the bearing the problem seemed to be solved but he posted next day to say that the black line was back. It makes sense that a drum shaft should have a continuous path to ground. Way back in the 80s there was a Mita DC513 and we had to put vaseline on the grounding plate going to the drum shaft because the arcing would cause the machine to crash. As soon as I get a free morning I will "manufacture" a grounding plate for the drum shaft and to ensure good contact, use some conductive grease. I will let you know if that solves it.

[BillyCarpenter]

Re: Kyocera 7002i thick solid black line

Brianneoe thought he had got to the source of the problem back in June when he discovered that there was intermittent continuity between the drum shaft and ground and having cleaned the bearing the problem seemed to be solved but he posted next day to say that the black line was back. It makes sense that a drum shaft should have a continuous path to ground. Way back in the 80s there was a Mita DC513 and we had to put vaseline on the grounding plate going to the drum shaft because the arcing would cause the machine to crash. As soon as I get a free morning I will "manufacture" a grounding plate for the drum shaft and to ensure good contact, use some conductive grease. I will let you know if that solves it.

Ever try conductive grease on the drum shaft?

[KYO_OEM]

Re: Kyocera 7002i thick solid black line

Ever try conductive grease on the drum shaft?

302LC94790 Grease Floil G-347CA (10g) SP (low impedance grease) for drum shaft and all drum contact areas....

[Necrocannibal]

Re: Kyocera 7002i thick solid black line

So we did the mylars in accordance to the tech bulletin and it is still doing it. We ordered the drum drive unit and hope thr ground is the issue.

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[KYO_OEM]

Re: Kyocera 7002i thick solid black line

good luck

[Necrocannibal]

Re: Kyocera 7002i thick solid black line

good luck

Thanks, hopefully this is thr issue because I have no idea where to go from here.

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[KYO_OEM]

Re: Kyocera 7002i thick solid black line

meanwhile have heard from several cases which would finally solved by this way.

[pascalb.]

Re: Kyocera 7002i thick solid black line

Hello,

for information I already had exactly the same problem.
solved by changing the transfer belt.
have a good day.

[KYO_OEM]

Re: Kyocera 7002i thick solid black line

belt + complete conveying unit would already replaced without success.
We also have had this kind of issue and 1 time it would solved by new TR and in 1 case new complete conveying unit needed.
But ib this case it wouldn`t solved with both parts.
It`s clear for me that we are talking about grounding problem, but why we are missing sometimes the grounding, this is the question.
Meanwhile i received 1 internal experience from KDC (non official bulletin), they are talking about missing ground for drum unit ( in rare cases)and new drum motor needed or you has to clean the shaft and the usage from low impedance grease also needed....

[Necrocannibal]

Re: Kyocera 7002i thick solid black line

Okay, we so we have replaced the drum unit, developer, transfer belt, mylars for transfer belt, high voltage power supply, main conveying unit, drum drive unit, cleaned all drum grounds and vacuumed out the entire machine to ensure it isn't arcing to anything. It is still doing it and I have no idea what to do to fix this and my tech rep just keeps telling me it is transfer belt related and offers no actual suggestions to try and help. If anyone has any ideas I am all ears, please send them my way.

[Necrocannibal]

Re: Kyocera 7002i thick solid black line

Multiple reports indicated in this post has fixed this issue by either drum kit (which includes new charge roller), developer kit, Front PWB, High Voltage PWB, or Transfer Belt. I experienced first case being the Front PWB. Another one of my personal experience was the Transfer belt addressing this problem. The Maintenance Kit includes the Transfer Belt, Drum, and Developer. So it may be between these 3 parts in most cases. There has been a change to the Transfer belt about a year or so ago that require mylars to be placed or removed depending how far the transfer belt tracked by measuring belt front machine edge to the metal frame. Since this change of transfer belt (assuming change in the production/manufacturing of the transfer belt), I've experienced uneven density, transfer belt tracking to either front or rear of the machine causing damage of the transfer belt, or the thick black band in question. This transfer belt issue is linked to the 00 (5500i), 01 (5501i), and 7002i/8002i series machines. So far, the thick black banding issue only seems to occur on the 7002i/8002i machines.

Do you by chance have the part number or name for this front board? The only board I see in the parts manual that is close to what you are talking about is the Front Mono PWB. Is that the board you have replaced to fix this issue? Thanks

[Rpizzle]

Re: Kyocera 7002i thick solid black line

Do you by chance have the part number or name for this front board? The only board I see in the parts manual that is close to what you are talking about is the Front Mono PWB. Is that the board you have replaced to fix this issue? Thanks

302NJ94070 _ PARTS PWB FRONT MONO ASSY SP.

any progress?

[Necrocannibal]

Re: Kyocera 7002i thick solid black line

302NJ94070 _ PARTS PWB FRONT MONO ASSY SP.

any progress?

Thank you, I assumed that was it from my research. We replaced that board last Friday and so far haven't had any call backs but it is too early to tell. I'm going to wait two weeks before calling it repaired.

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