Sharp ARM237

[Jaws]

Got a weird shading and light/faint copy problem when using the platen glass for copying. The ADF copies are fine. And it looks like the shading/light/faint goes away the closer it gets to the right of the platen glass. Take a look at my copies below. Any suggestions, ideas, heck even smartazz coments are welcome.. Thanks in advance.
rectangle test.JPG2 lattice copy.JPGArm237 Testchart.JPG

[Dark Helmet]

Re: Sharp ARM237

Check to make sure your optics are stills square. I had a old PB Minolta copier. It was in a military base kitchen and some wizard put a heavy ass bag of something on the corner of the document feeder, broke the welds on the optics frame and the thing twisted slighty downwards. If you took the glass off and ran the optics back and forth you could see the one end going down hill. Their fix was to put their foot on the corner of the stand foot and lift upwards if they had light copies.

I did have a sharp copier that must of tried to commit suicide at the factory as the one corner of the optics was bent all to hell. Copies off the glass looked ok but when you used the DF it had MAJOR shading. Removing all the plastic covers and putting a ruler on showed about a 1/8 bend in the frame.

Im going to roll with something bent as there is tons of support for the frame on the right side of the optics so the ADF should look fine. Left side is kinda free floating over there.

I hope thats smart ass and helpful.

[JustManuals]

Re: Sharp ARM237

This Parts & Service manual can now be purchased for $12.77 and downloaded immediately after payment from

Just Manuals ~ The Internet's largest selection of manuals ~ Instant Downloads


Paul@justmanuals.com

[brewster67]

Re: Sharp ARM237

It looks like the mirrors are not moving smoothly. Have you check the optic cables or the optics drive motor.

[oldrn]

Re: Sharp ARM237

Did you try simulation 1-1 and watch the mirror assembly movement? It is possible to put the wrong screw in to hold down the left glass cover - a long enough screw will hit the lamp assembly. Did you clean & lube the rails? If you have worked on Sharps, you know to watch for Sharp's sharp metal edges on things like rails. Is there any history to go along with the problem - start after servicing, was worked on by someone else, was ok on Friday but not on Monday?

[toner head]

Re: Sharp ARM237

Make sure rails are clean and try lubricating the bearings in the scan wire pulleys.

[Jaws]

Re: Sharp ARM237

Thanks for all the suggestions. I went out today for the second time trying to find something bent or out of place or binding. No luck, finally starting messing with the angle of the CCD unit. I got it up and copies are now clear. Had to readjust the leading edge and the skew is a hair off. But, it is ten times better than before. Thanks to all.

[blackcat4866]

Re: Sharp ARM237

Congratulations. It's kinda weird though that the CCD would be out of position. I'm thinking that you successfully compensated for some tweaked optics. Again congratulations. =^..^=

[Dark Helmet]

Re: Sharp ARM237

I would agree with Blackcat. Ive never had to touch a CCD other than wipe it off.

[DINGO]

[oldrn]

Re: Sharp ARM237

Sharp's instructions on replacing the LSU are to remove the entire scan unit from the top of the machine. I didn't listen to the olr'n wiser co-worker who always assumes there is an easier way, is a don't read the manual kind of guy, and I removed the scanner section, frame and all. When I put the scanner back, I believe I did end up with an odd CQ problem, probably from a twisted scanner unit and I believe I may have resolved it through CCD adjustments. Needless to say, I found an easier way to replace the LSU after that.

I also believe I may have adjusted CCDs on this series when I first started seeing E7-11 (?) errors that could not be resolved with white sheet placement. I would not suggest CCD adjustment to anyone with a short temper.