AR-208d high pitched whining noise

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • axyun
    Service Manager

    Site Contributor
    1,000+ Posts
    • Aug 2007
    • 1323
    #1

    AR-208d high pitched whining noise

    A high pitched whining noise on Ar-208D sounds like fan. When machine is turned off the whining noise winds down gradually as though a fan slowing its rotation. Disconnected the exhaust fan but noise continues.
    Could it be from power supply? If it were charge unit I imagine it would stop immediately when power is turned off. Any help on this is appreciated. Frank/ActionPhotocopy
    Tags: 208d, ar-208d, fan, high, nec, noise, power, power save, power supply, replicate, rotation, stop, supply, unit, whining
    • gwaddle
      Senior Tech

      500+ Posts
      • May 2009
      • 782
      #2
      My guess would be a laser unit getting ready to fail.
      I know I should be ashamed of myself. Strangely though, I am not.

        Comment

        • Dark Helmet
          Senior Tech

          Site Contributor
          VIP Subscriber
          500+ Posts
          • May 2009
          • 771
          #3
          Originally posted by gwaddle
          My guess would be a laser unit getting ready to fail.
          Ive heard the AR168's make a high pitched noise when the laser was failing. Use sim 25-10 to spin up the laser.
          Evil will always triumph because good is dumb.

            Comment

            • OMD-227
              #4
              Yeah, possibly noisy polygon motor in the LSU, but that would eventually wind down & stop as the machine entered power save modes, so it wouldn't be noisy all the time.
              Otherwise, if it sounds like a fan, run the fan sim test.
              If its more of a rattle noise, could be a loose cover somewhere, so as the LSU slows down, so does the internal machine vibrations.
              If its more of a high pitched squeal, I've seen plenty of DC power boards in my time have a dry capacitor onboard which causes this. As the power is turned off, the capacitor slowly releases its charge and can make this 'wind-down' noise in the process.
              I went to a clients one time for a 'squealing noise' call-out. As soon as I entered the door I could hear it, whereas 75% of the staff couldn't hear a thing. These 75% staff were all over 50 years old, those that could hear it were much younger. That proved something I had always heard about hearing loss of certain frequencies as we get older.

              Check power supply boards, fans, motors, covers, LSU. You will either replicate this in sim or it will be the power supply.

                Comment

                • axyun
                  Service Manager

                  Site Contributor
                  1,000+ Posts
                  • Aug 2007
                  • 1323
                  #5
                  Thanks a lot guys. I thought that the noise might be coming from the power supply under the exits area but was not sure. The pologon motor test should help determine which is causing problem. Thanks for the extra info Warren. I guess if it is power supply I can do a board exchange. Frank

                    Comment

                    • axyun
                      Service Manager

                      Site Contributor
                      1,000+ Posts
                      • Aug 2007
                      • 1323
                      #6
                      Did Sim 25/10 today which confirmed LSU is problem. Have not changed one on this model type yet. Have done many on AR-200 series, couple on old Al series and couple on AR-275 series. . Frank

                        Comment

                        Previous template Next
                        Working...