Adjustment after polygon mirror replacement on a Aficio 250 (Savin 2515)

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • drducttape
    • Jul 2025

    #1

    Adjustment after polygon mirror replacement on a Aficio 250 (Savin 2515)

    Hello everyone,

    After replacing the polygon motor on my Savin 2515, I was at first very happy that it worked and then not so happy when the staff almost immediately pointed out that the output was not as clear as it was before my repair. They were quite right; it's certainly legible, but bar codes for example nowhere near are crisp as they used to be, and some of the scanners can no longer read them.

    I dug into the service manual to see if any additional steps are needed after such servicing and learned about how to print and use a test grid to determine if the Main Scan Magnification needs to be adjusted. It wasn't hard to see that the squares came out much smaller than the 4 mm stated in the specifications.

    I tried adjusting the magnification (SP 2-998) but it looks like even the maximum setting isn't changing the grid square size to anywhere near the specified target. It also looks like there is a maximum of plus or minus 0.5mm because those are the maximum values that the interface allows, but I'm not at all sure if that it's how this limit works.

    If that is how it works, does that mean that I placed the polygon motor too close or far from the mirrors? While replacing it, I noticed that there was a lot more that a half millimeter of wiggle room before securing the screws, and that the screws had "seal" marks on them. Does that indicate some specialized knowledge that is preventing a newbie like me from trying to keep an otherwise perfectly fine photocopier from the curb after the warranty has expired?

    If my assumptions are correct, does it mean that I have to go in again and physically move the polygon mirror unit, and if so, which way?

    If not, does anyone have any suggestions about what I can do next?

    Thank you esteemed experts...
  • Jomama46
    Field Supervisor

    Site Contributor
    2,500+ Posts
    • Apr 2008
    • 2900

    #2
    You replaced the whole motor assy, right? Not just the mirror. Possible you got the wrong motor board? The grid should not by that far off. you may need a tech.
    sigpic
    You never realize how cheap a professional is until after you let an amateur do it.
    A+; Network +; PDI+

    Comment

    • Zeldaman
      Senior Tech

      500+ Posts
      • Mar 2011
      • 946

      #3

      Comment

      • drducttape

        #4
        Yes Jomoma, I replaced the entire assembly with a new one, board and all after removing four screws and two wire connectors. The old assembly would spin, but the copier would then fail with an SC320 error. Would the wrong board still work so well except for this alignment difference? (Printing and copying seem fine; if it wasn't for the bar codes and some of the flimsy receipts that the staff copies, no one might have noticed.) If so, how can I verify that?

        Thanks for your answer too Zeldaman. I don't know about the PCU, but the fan appears fine (albeit quite far from the assembly in my opinion, unless you're referring to another one) although that doesn't matter; I read that overheating is the primary suspect behind polygon mirror motor failures (a weakness in this model) so I added my own fan to protect the new piece. (It has its own and completely independent power supply.) If you suspect the PCU, is there any way I can check that (without having to purchase a new one?)

        Comment

        Working...