Sharp AR-337 distorted copy

[printech]

Hi! I have a customer with this issue: every once in a 5-6 copies the copy lamp stalls for a second or so and the images are getting distorted horizontally, in the scanning direction, the image becomes elongated. A grinding noise can be heard when this hapens but nothing is in the way of the lamp assy. It moves freely when moved by hand. Any ideas? Thanks!

[lobbelios]

Its the scanner drive PWB that is the problem!! Common problem

[Sharpshooter]

I agree too that it can be the scanner pwb or it can be the motor or the scanner wire ballbearings too. Check them. I have changed them sometimes too.

[tmaged]

The Swedes have it ! You need to replace both the Scanner motor & PWB. Any will work as long as they are replaced in pair. You can change the motor phase in 26-59 if you put a different phase motor on.

[graybeard]

The motor and pwb are usually the cause, but due to the age of the machine we have had a couple of other causes. The bushings on the shaft have actually worn down on one machine enough to stall the scanner, and we've had one where the scanner wires themselves have taken the curve around the pulley to shape and caused stalling. I love restringing scanner cables.....blech!

[printech]

Hey guys, first of all,thanks for your suggestions. I replaced the scanner motor only but did not fix it. I'll go for the scanner PWB next (by the way, does any of you have the part number for it?) I looked up this issue in the Sharp Cougar technical update and they say :

"Fault:Intermittent elongated, smudged or blurred copies. Also causes Blank or Image Shift.
Advise:Check for installation of the TC earth spring. Install if missing(

MSPRP1550FCZZ). Also check for TC Arching due to broken lift angles"

"Fault:Erratic scanner operation/lock ups.

Advise:Check for MC/TC arching.Check both TC lift angles for damge etc."

What are they talking about? Of course I didn't check for that! How this could be related, the charger and the scanner?

[tmaged]

More than likely, it's the motor & pwb. They're talking high voltage arcing which can cause a lot of stuff. I've never seen it happen, but have replaced many motor & scanner pwbs.
The're talking about the lift arms for the center transport section under the drum. End users break them by turning the wrong way or forcing them.

[ZOOTECH]

"The're talking about the lift arms for the center transport section under the drum. End users break them by turning the wrong way or forcing them."
There is a ground wire that will be cut when that customer turns the lift up handle the wrong way. With static build up from paper transport, it can cause all sorts of error codes also.
The stretched copy is most likely the scanner motor and pwb as mentioned above, if they are not replaced at the same time, you may end up taking out either the motor or board again.

[xeroxsharp]

Hi! I have a customer with this issue: every once in a 5-6 copies the copy lamp stalls for a second or so and the images are getting distorted horizontally, in the scanning direction, the image becomes elongated. A grinding noise can be heard when this hapens but nothing is in the way of the lamp assy. It moves freely when moved by hand. Any ideas? Thanks!

Hello,I had the same problem in AR 507. I still did not order motor or pwb,because I did some adjustments on
Mirror motor fixing plate and spring,and lubricated both scaning rails. I do not have any problems for now-more than ten weeks,but I know it will not take for long time.

[krasiganev]

Same probrem

Hi, everybody!
On most of my mashines I have the same problem . I wonder, is there another solution with the scanner PWB. Which is deffective element on it. Why cant we replase only them to get the same result as the new PWB.
If someone have an idea, it will be very nice

[printech]

Hello back, yes, tmaged and greybeard were right, you have to replace the motor and board at the same time. It worked! Thank you all!

[bilyahn]

Hey guys, first of all,thanks for your suggestions. I replaced the scanner motor only but did not fix it. I'll go for the scanner PWB next (by the way, does any of you have the part number for it?) I looked up this issue in the Sharp Cougar technical update and they say :

"Fault:Intermittent elongated, smudged or blurred copies. Also causes Blank or Image Shift.
Advise:Check for installation of the TC earth spring. Install if missing(MSPRP1550FCZZ). Also check for TC Arching due to broken lift angles"

"Fault:Erratic scanner operation/lock ups.

Advise:Check for MC/TC arching.Check both TC lift angles for damge etc."

What are they talking about? Of course I didn't check for that! How this could be related, the charger and the scanner?

What they mean here is that your will get an image shift in the middle of your copy due to the tranfer or charge unit arching. You could get some really wild images when it started to do that but from your description it has pretty much been covered by the previous comments. The image shift will be all over the place too. I few lines in one direction and then shifted the other direction or cutoff entirely.