sharp ar-m237 with white lines

[stevel]

have sharp arm237 with white lines running from lead to trail edge. of course it causes an area about 1/4 wide which destroys the copy quality. it does in copy from glass, copy from adf or print from computer. had another tech look at and we can not find the problem. of coarse i noticed it when i did pm with new drum and blade, developer, ts roller kit, charge corona is also new, dev seals are new. i looked at customers copies and it was there before pm. i notice if the copier sits for a several hours the problem is gone and when i run 50 copies or more it starts to show up and stays there till the copier sits again. if you only make 5 copies here and there it doesn't show up. no damage to drum, fuser or charge assy in this area.
it is towards the front edge of copy about 3 inches in and runs from lead to trail edge.

[benerin]

Re: sharp ar-m237 with white lines

Please send sample copies....

[JustManuals]

Re: sharp ar-m237 with white lines

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[bilyahn]

Re: sharp ar-m237 with white lines

What does the developer mag roller look like when this starts? Have you tried a different drum unit (the entire thing not just rebuild)? Is the blank area always in the exact same spot or does it move around some?

Good luck.

Bil

[blackcat4866]

Re: sharp ar-m237 with white lines

Are the edges of the blank area crisp and clean, or fuzzy?

Primary charge or drum will create a crisp clean white line.
Developing or transfer will create a fuzzy edged white area.
=^..^=

[stevel]

Re: sharp ar-m237 with white lines

Are the edges of the blank area crisp and clean, or fuzzy?

Primary charge or drum will create a crisp clean white line.
Developing or transfer will create a fuzzy edged white area.
=^..^=

white lines are clean and run from lead to trail and are needle thin with an area about 1/4 wide there must be 20 white lines like something touching the drum, but no damage or fuzzies on grid. new drum dev, charge and grid, ts roller. tried another drumunit,dev assy. going back to check for warp guide plates in drum area. dev top seal also new. it is almost like the memory that store might have a bad chip/sector.

[stevel]

Re: sharp ar-m237 with white lines

What does the developer mag roller look like when this starts? Have you tried a different drum unit (the entire thing not just rebuild)? Is the blank area always in the exact same spot or does it move around some?

Good luck.

Bil

it reminds me of a mag plate problem but when i inspected the mag roller the dev is even and clean. thought i installed a defective drum, ts roller or charger on pm. tried another drum assy and deve assy from another copier and the problem is still there. its not optics since prints do the exact same cq problem. if the copier sits for a long time and i make 5 copies you might see one fine line in this area. but if i make 50 copies it grows to 1/4 in wide and then stays like that till the copier sits idle for a long period. within this 1/4 area there are many thin white line. no matter what i change it is in the exact same area running from lead to trail edge. normally i would say mag/dev problem or drum/charger problem. switched out with another used copier with no cq problems and the used parts did the exact same thing.

[blackcat4866]

Re: sharp ar-m237 with white lines

It sounds like you've covered the obvious things.

Those little fuzzies that collect on the grid, can also produce the same effect inside the grid, on the lid of the developing unit, the plastic drum guides, the lower registration guide, literally anywhere within 5mm of the drum surface, discharging the drum surface.

I've done this a dozen times. Pull out everything near the drum unit. Wipe down every surface near the drum. The fuzzies move a little. Disassemble again. Wipe down again. It's taken a dozen or more times to move the fuzzies far enough from the drum to make it stop. =^..^=

[Dark Helmet]

Re: sharp ar-m237 with white lines

You could try cleaning or swapping out the laser.

[copiman]

Re: sharp ar-m237 with white lines

I think Lawrence may have something there. Worth checking out.

[ZOOTECH]

Re: sharp ar-m237 with white lines

Yeah, it might just be some toner dust splashed up onto the LSU glass.

[stevel]

Re: sharp ar-m237 with white lines

You could try cleaning or swapping out the laser.

ripping out the laser today. have checked for fuzzies and warped plates, re-ck grid and everything around drum. it could crap in the laser. changed cassette to 11r so it has lines on very edge to get buy. thanks

[copiman]

Re: sharp ar-m237 with white lines

ripping out the laser today. have checked for fuzzies and warped plates, re-ck grid and everything around drum. it could crap in the laser. changed cassette to 11r so it has lines on very edge to get buy. thanks

Let us know what you find. Have a happy and safe New Year.

[stevel]

Re: sharp ar-m237 with white lines

Let us know what you find. Have a happy and safe New Year.

removed laser on 12-30-2011 and it was very clean, but cleaned it anyway. looked thru the laser area to the drum and it looked clean with nothing blocking the laser. i am going to change the laser and check to see what stores the document before laser action but after scan or print. will update.

[BMSInc95]

Re: sharp ar-m237 with white lines

Dirty or missing charge will create black lines. Sounds like a DV issue or transfer problem. Maybe the T/S unit being rebuilt was put back together wrong. Debris in the DV unit can cause this too. I would look at those 2.