Ricoh Aficio 650

[mata]

Hello great tech.
I have a small problem with this great printer, as you can see on attached picture. This black lines sometimes cover whole paper and sometimes just one side. Does anyone have similar problem? I changed developer, drum, charge corona, blades, whole developer unit and transver belt...
When i clean machine it works for some 10-20K copies and then start printing this lines on the image. I stop machine on half print just to see if this lines forms on drum surface, and there they are. I don't have any ideas anymore.
If you have same problem please help.

Tnx

[Vulkor]

I don't know anything about this older model bud. Does it have a Charge ROLLER? I see Corona mentioned, but not the charge roller.

[Jomama46]

No charge roller on this old dog. But this could be a laser or HD problem

[schooltech]

It has just a hint of a dirty charge wire, with the smoky-looking lines, except the edge of the paper with the blotchy spots.

So, they show up on the drum when you stop the machine mid-copy?

Finally, someone who actually DOES this recommendation before we recommend doing this.

I don't recall you stating it, but have you cut the machine in half? In other words, have you determined whether this is from any internal prints or just when you use the scanner portion? I'd be curious if the machine is doing this with a SMC or meter printout. You could have some type of weird blanking lamp problem or where the drum is not fully able to discharge via a bad ground.

It sounds like you've thrown a lot of parts at the machine, and still the problem exists.

When you say you clean the machine and it goes away, what are you cleaning? If it does go away, then the cleaning of the machine tells you that something you are doing is working, but what is it? Is it when you're tearing something apart, reseating something, by separating a connector that has buildup on it, or are you doing something else that is affecting the machine in a positive way?

You're narrowing it down, but I would look back at what you are doing when you clean it. I think the the problem may be one of those areas.

[imaginemoko]

it seems a charge unit problem try a power pack or charge assy, perhaps corona end blocks worn out.

[jprecht]

FUNNY LINES

hey! i'm with idaho. when you clean box are you finding "toner dusting"? i would check your dev bias and grid bias also your toner feed ratio, for starters if you have changed all those parts and prob returns after 10-20k has got to be blowing toner. good luck!!!
jp

[FRIDGEMAGNET]

Looks to me like dirty corona grid - did you replace it with the charge wire?

[iMind]

[tcs04]

Hello great tech.

I have a small problem with this great printer, as you can see on attached picture. This black lines sometimes cover whole paper and sometimes just one side. Does anyone have similar problem? I changed developer, drum, charge corona, blades, whole developer unit and transver belt...
When i clean machine it works for some 10-20K copies and then start printing this lines on the image. I stop machine on half print just to see if this lines forms on drum surface, and there they are. I don't have any ideas anymore.
If you have same problem please help.

Tnx

Check the bias pin on the back of the old dev unit if you still have it. Is there any wear on the shaft?
If yes take a close look in the smal bias bearing in the machine frame behind the dev unit. These used to fail and cause odd faults including bias codes and dumping dev / toner.

If you change the bearing and holder be sure to scratch around the holder before removing and replace in EXACTLY the same position as the originals were jigged at the factory.

We used to change these and the mag roller quite often. you must be gentle when inserting these dev units as the bearing can be easily damaged by the dev pin if not lined up.

[subith]

Try to replace its brush roller...

[Scott_Lewis]

Definitely start with replacing the charge wires and grid. Then, you need to figure out why it's only lasting 20k.

[mata]

Wow! Thanks for replies. I didn't expect that much.
I wont say i have a toner dusting. It have some toner on transver belt ends but as much as you expect at 20k copies, and nowere else. When i clean that toner it gets much better, but still not near good. As i said i change a whole corona unit with new grid and wires and nothing happens. It's not the scanner as i have this problem on counter printout.
I can't belive that the transver belt unit gives this problem, but everythig is pointig at that. Next time when this shows up i'm going to reconnect a transver belt connector, or just clean that unit and see what's happening.
I take this machine 50k ago to our service and disassambled it to smallest peaces. Change some paper transport gears, whole developer unit gears and bushings, developer, cleaning brush, blade, transver cleaning blade, belt, drum, every developer seal, charge corona... Machine works perfectly, and i really mean perfectly for 20k. But And again 18k. But

I'll check bias bearing as tcs04 recommend and transver belt unit.
I just don't know what else can it be.

Tnx for all answers...

[mikadonovan]

I have to agree with Imind. You have listed parts replaced, and the cleaning brush was not one of them. A worn and/or toner caked brush could cause a copy like this. TIme to bring this customer into the 21st century. I haven't had to work on an A175 in years.
One more thing. If I remember right, the development unit mag roller shaft goes into a bearing mounted in the rear frame. I think I used to have a problem with the bearings locking up and damaging the shaft causing copy quality problems.

[imaginemoko]

am just thingking... if toner is droping at the end of transfer belt... ofcourse its comes from drum. poor cleaning brush and poor pcu seals can accumulate toner... or poor pcu seals can cause the drum to touch the development seals in a long run that can cause the drum to scratch be grounded and accumulate toner... droping to the transfer belt that can also damage the transfer bias brush... if charge unit is new.. ans still same problem...development unit is new together with seals... drum....still??? how about the SP 2 xxx? have we try to reset to defaults?

[sharkie]

Looks like charge grid to me.