can anyone help

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  • jamesyboy
    toner monkey

    100+ Posts
    • Jul 2010
    • 188
    #1

    can anyone help

    Have a problem with a 1107ex pro

    original fault sc 996 polygon motor,engineer changed polygon machines now displays covr open !!!

    we have changed all related boards in optics cavity io,bicu.psu bypassed door swiches losing 5vols somehow I think but cannot track down tested all harness wiring etc help!!
    Tags: 110, bypassed, cable, displays, door, down, ect, engineer, ess, etc, fault, form, harness, help, laser, layout, losing, motor, nec, open, polygon, power supply, psu, ribbon cable, track, wiring
    • luig
      Technician

      50+ Posts
      • Sep 2007
      • 52
      #2
      Hi jamesyboy, in my experience, the ribbon cable form the laser to the BCU (or what ever they call it) is not connected correctly or at all. Usually at the board somehow it will get overlooked.

      Good luck

        Comment

        • jamesyboy
          toner monkey

          100+ Posts
          • Jul 2010
          • 188
          #3
          thanks I will check that out

            Comment

            • zed255
              How'd ya manage that?

              1,000+ Posts
              • Dec 2009
              • 1024
              #4
              I have had the registration motor harness rub through against a bracket in the machine resulting in different very wierd codes and behaviour, including being 'tricked' into replacing the polygon motor. The resulting short causes some portion of the power supply to self protect. Worth a look, I've seen this on several closely related models.

                Comment

                • tcs04
                  FORMER Techie

                  1,000+ Posts
                  • Apr 2009
                  • 1183
                  #5
                  Originally posted by jamesyboy
                  Have a problem with a 1107ex pro

                  original fault sc 996 polygon motor,engineer changed polygon machines now displays covr open !!!

                  we have changed all related boards in optics cavity io,bicu.psu bypassed door swiches losing 5vols somehow I think but cannot track down tested all harness wiring etc help!!
                  Switch machine off and check for continuity between pins 1 and 3 on the connector of CN406 (unplugged) at the Laser diode pcb in the optics cavity. If this is open circuit with the front doors closed the problem is the laser safety switch circuit (Check by opening and reclosing the doors). Check for 5V at CN712 on PSU-E-A (PCB 17, Component Layout 2/3 fig 11, item 7)

                  You can check for 5V at the diode pcb CN405 pin 2, but BE CAREFUL!!! MAKE SURE THE FRONT DOORS ARE OPEN!!! LASERS!!!

                    Comment

                    • jamesyboy
                      toner monkey

                      100+ Posts
                      • Jul 2010
                      • 188
                      #6
                      many thanks for all the good input so far more food for thought on this problem cheers jamesyboy (challenged)

                        Comment

                        • G'Man
                          Technician
                          • Feb 2010
                          • 28
                          #7
                          Hi,
                          Have a look at the SMC data, My guess is that you are also getting SC220 or 240 generated at the same time as SC996. If so, replace the LDU.

                          G'Man.

                            Comment

                            • jamesyboy
                              toner monkey

                              100+ Posts
                              • Jul 2010
                              • 188
                              #8
                              Thanks for all replys help all fixed now poor connection within connector broken wire

                                Comment

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