SC547 on MP5500

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  • bostjanma
    • Aug 2025
    #1

    SC547 on MP5500

    I have SC547 zero cross signal problem on MP 5500. I thing it must be PowerSuply unit defectiv? Do you have any other experiance?

    THX
    Tags: 500, 550, 5500, cross, mp550, mp5500, power supply, sc547, signal, unit
    • Zeldaman
      Senior Tech

      500+ Posts
      • Mar 2011
      • 946
      #2
      Hi there!
      The SC-5.. is well known by Ricoh for the "Martini"-Series. Change following parts: bracket D0624196 & D0624197 , Thermistors AW100131 & AW100132 . Then make an Enginefirmware-Upgrade.
      Greetings...

        Comment

        • bostjanma
          #3
          Thank you for advice, but I done this in the past! It must be serious problem?

            Comment

            • rsyarcia
              Hair Straightener Tech

              500+ Posts
              • Feb 2008
              • 711
              #4
              We encountered it with mpc 2550 and mp 4500, we tried to repair the power supply but we were not able to fix it. Haven't tried if firmware update can solve this.
              Nobody is perfect..

                Comment

                • TonerMunkeh
                  Professional Moron

                  2,500+ Posts
                  • Apr 2008
                  • 3865
                  #5
                  Unstable power can also cause this issue.
                  It's 106 miles to Chicago. We've got a full tank of gas, half a pack of cigarettes, it's dark and we're wearing sunglasses.

                  Hit it.

                    Comment

                    • bostjanma
                      #6
                      Offcourse I purpose unstable power, but costumer have not problems with other sensitive electrical equipement ( computers etc. )

                        Comment

                        • TonerMunkeh
                          Professional Moron

                          2,500+ Posts
                          • Apr 2008
                          • 3865
                          #7
                          Computers aren't as sensitive as copiers. A customer had two MPC4000's running on a generator and would pop 547 every two days or so. Their computers never even noticed it. When they switched to mains power, the 547's stopped.
                          It's 106 miles to Chicago. We've got a full tank of gas, half a pack of cigarettes, it's dark and we're wearing sunglasses.

                          Hit it.

                            Comment

                            • teebee1234
                              Service Manager

                              Site Contributor
                              1,000+ Posts
                              • Jul 2008
                              • 1670
                              #8
                              Ditto what TonerMunkeh says. They may want to invest in a Line Conditioner to even out any voltage fluctuations.

                                Comment

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