The machine was coding SC345 and I found the drum ruined. On the rear side it had a quarter-inch wide bare metal showing all the way around. Developer particles are collecting on the drum blade, and sanding off the drum surface. The damaged area matches up with the rear edge of the developer mag brush. I hope someone has seen this and can tell me exactly what it's going to take to fix it. I'm afraid it'll be more than replacing the developer. Anyone? Thanks!
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Re: Ricoh 2075 developer particles on drum blade
Hi
Just a thought... IS the machine level front to back, as this would cause the dev to Stack and build up at one side then cause what you are describing.
Otherwise these machines are relativley simple, although run dirty.
Is the drum recycling ok? -
Re: Ricoh 2075 developer particles on drum blade
Yes machine is level. Had been running fine, to the tune of 120k since last worked on. So something changed...that's what I want to know. But you're on the right track...dev is stacking up on the rear side. I don't understand what you mean by the drum recycling ok. Sounds like you have some pretty good experience with this model, but you've never seen this. That tells me it could be something really weird.Comment
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Re: Ricoh 2075 developer particles on drum blade
Hi,
how many total pages have the machine? If you have more than 1 mil. you will need to replace the developer unit.Comment
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Re: Ricoh 2075 developer particles on drum blade
It only has 966,325 copies on it (not near a million, lol)...so it's there. Have you seen this problem?Comment
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Re: Ricoh 2075 developer particles on drum blade
I always replaced development unit after 1 mil. Description for this issue is on this forum but you should look for Ricoh A1075...Comment
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Re: Ricoh 2075 developer particles on drum blade
Dump the developer and inspect the dev unit gears and auger operation. You might have something broken inside.NEVER ASSUME ANYTHINGComment
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Re: Ricoh 2075 developer particles on drum blade
That quarter inch space on drum that is I assume stripped of photosensitive is allso consistant to the sponge material at the front and rear side of drum,supporting the drum in assembly,while drum is allso leaning on cleaning blade.
Machines tend to show "background" after developer is worn out,it get's transfered on drum in small amount during the proces and stacks up on cleaning blade,in your case it allso stacked up on sponge that's supporting drum and after a while friction damaged drum on rear side.
In my opinion that developer shuld be replaced,don't forget to change mylar bushings to prevent dev leakage on pick up assembly,developer can't do 1 milion pappers printed...more like 400000.
I'm not shure that Developing assembly in those machines can "stack and build up at one side"...worn out or damaged mylars and gears shuld cause mag. roller to stop completly.Gears,springs,clutches,sliders,connectors and electronics...who on earth can tell what's wrong with it?Comment
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Re: Ricoh 2075 developer particles on drum blade
Fbkhan3 - the SC345 went away with the new drum. (Pretty sure arcing was occurring where bare metal was showing.) Mikadonovan that's a great idea as I can put the dv right back in after inspection. But mag brush looks normal when I turn the gears by hand. Herostrat the dv particles are on the end of the blade, not the sponge. Someone out there has seen this exact problem, and can tell me what's causing it. I hope that person comes across this thread and replies. Unless I can fix for a reasonable price, it's update time. thanks for responding...Comment
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Re: Ricoh 2075 developer particles on drum blade
Hi TEKK09
I have had the metal on the PCU frame rub against the drum and cause the surface to wear down and cause ID errors.
This was cured by fitting a lower PCU frame.
As the others say though, aprox about a mill you can get dev unit faults with leaks etc , however we fit the dev unit bushings to stop dev leaks at 600K then 1.2Mill and they usually achieve this easily.
These machines are good machines and are pretty simple, in my eyes you have a couple of areas to eliminate...
PCU incl drum...
Dev Unit...
I do remember having a similar issue where the dev chucked out and was all over thePCU and transfer unit, this was caused by dodgy toner!!!!
If you are using anything dodgy, ie toner or parts, you need to eliminate these first!, there is some realy crap parts and toner out there at the moment that causes problems that are out of the norm!, I've even seen crappy toner in refilled OEM bottles, and you dont realise until it's taken hours to find the fault.Comment
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Re: Ricoh 2075 developer particles on drum blade
[Problem]
Double Image / Intermittent SC 345
[Cause]
The Drum Drive Shaft main screw is loose or missing.
[Action]
Remove Drum Flywheel, then tighten Drum Drive Shaft main screw to shaft.Comment
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