"Set Fusing unit Correctly" will not go away

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  • kannuki2
    Trusted Tech
    250+ Posts
    • Feb 2012
    • 398
    #1

    "Set Fusing unit Correctly" will not go away

    Hello Gentlemen, I have a MPC300(SR) with the error message "Set Fusing Unit Correctly". Thus far, I've replaced the following parts:


    1. New Fusing Unit Assembly
    2. Thermopile
    3. Power Supply Unit


    The machine will work for 2 hours after the replacement then it coded out again. Have anyone seen this issue before? Also, I checked all interlock switches working and push switch on the side door.
    Tags: None
    • qbert69
      Service Manager

      1,000+ Posts
      • Mar 2013
      • 1152
      #2
      Re: "Set Fusing unit Correctly" will not go away

      CHECK THE PINS IN YOUR FUSING CONNECTORS!!!

      I have seen a freak incident where a connector was bad (on the fuser itself, I think!) and the pin had slid back into the connector, therefore not making any contact with the connector on the main machine! You should be able to get a pair of forceps and pull the pin back into position!

      Just a Thought!

      REACH FOR THE STARS!!!
      Konica Minolta Planetariums!
      https://www.konicaminolta.com/planet...gma/index.html

        Comment

        • kannuki2
          Trusted Tech
          250+ Posts
          • Feb 2012
          • 398
          #3
          Re: "Set Fusing unit Correctly" will not go away

          Thanks qbert, I did check all the pins at the time i replaced the new fusing unit. The weirdest thing about this problem is after I replaced the fusing unit, it will work for awhile. Then if the machine goes off or to energy saver mode, then it errors out with that message. I've upgraded all firmwares to latest versions. Energy saver firmware to version 1.7.1.

          Thanks for your input, i will double check the connector once more time.

            Comment

            • Iowatech
              Not a service manager

              2,500+ Posts
              • Dec 2009
              • 3930
              #4
              Re: "Set Fusing unit Correctly" will not go away

              I don't know how much this will help, the mothership is currently switching to brand X, so I don't have access to the newer machines like this one.
              Still, I have seen something like this on the MPC2030 where the plastic latches that hold the fuser in place got damaged.
              Sorry if that was a waste of time.

                Comment

                • kannuki2
                  Trusted Tech
                  250+ Posts
                  • Feb 2012
                  • 398
                  #5
                  Re: "Set Fusing unit Correctly" will not go away

                  *Resolved* You will not believe what my senior tech and I found. The rear fusing fan was not "ON" when we did output check sp5804-100. So we swapped a good fan and was still not working. We replaced BICU and immediately the fan came right on. So when i shut the machine off for 1 day it worked the next day. The heat was trapped behind all the boards and it triggered the message. The only thing I do not understand is what triggers the message "set fusing unit correctly" when it is too hot. Is that a safety mechanism from the thermopile to prevent fire to the machine when the machine gets too hot?

                    Comment

                    • mikadonovan
                      Senior Tech

                      Site Contributor
                      2,500+ Posts
                      • May 2008
                      • 2931
                      #6
                      Re: "Set Fusing unit Correctly" will not go away

                      Originally posted by kannuki2
                      *Resolved* You will not believe what my senior tech and I found. The rear fusing fan was not "ON" when we did output check sp5804-100. So we swapped a good fan and was still not working. We replaced BICU and immediately the fan came right on. So when i shut the machine off for 1 day it worked the next day. The heat was trapped behind all the boards and it triggered the message. The only thing I do not understand is what triggers the message "set fusing unit correctly" when it is too hot. Is that a safety mechanism from the thermopile to prevent fire to the machine when the machine gets too hot?
                      You just said a bad BICU was the issue. I don't think safety has anything to do with it. Thermal protection falls under the SC 5XX codes. A bad BICU can cause all sorts of weird stuff.
                      NEVER ASSUME ANYTHING

                        Comment

                        • copier tech
                          Field Supervisor

                          5,000+ Posts
                          • Jan 2014
                          • 8132
                          #7
                          Re: "Set Fusing unit Correctly" will not go away

                          Strange, I would have expected the machine to throw an error related to the fan not spinning etc!
                          Let us eat, drink, and be merry, because tomorrow we may die!

                          For all your firmware & service manual needs please visit us at:

                          www.copierfirmware.co.uk - www.printerfirmware.co.uk
                          ​

                            Comment

                            • aabs
                              Technician
                              • Jun 2015
                              • 15
                              #8
                              Re: "Set Fusing unit Correctly" will not go away

                              "set fuser unit correct" will also appear after the BICU eeprom has been replaced due to the area selection being the wrong country.
                              Set in factory SP to the correct location & reboot.

                                Comment

                                • COPIERMAN
                                  Senior Tech

                                  500+ Posts
                                  • Jun 2009
                                  • 559
                                  #9
                                  Re: "Set Fusing unit Correctly" will not go away

                                  you swap fan first and then board and it started working . Do you go back and test old fan to see if it was good. Could be your board went bad and that was main issue.

                                    Comment

                                    • Azero
                                      Junior Member
                                      • Oct 2021
                                      • 1
                                      #10
                                      Re: "Set Fusing unit Correctly" will not go away

                                      Originally posted by aabs
                                      "set fuser unit correct" will also appear after the BICU eeprom has been replaced due to the area selection being the wrong country.
                                      Set in factory SP to the correct location & reboot.
                                      how do i set my location

                                        Comment

                                        • luca72
                                          Field Supervisor

                                          1,000+ Posts
                                          • Oct 2017
                                          • 1740
                                          #11
                                          Re: "Set Fusing unit Correctly" will not go away

                                          Originally posted by Azero
                                          how do i set my location
                                          maybe 5-816-150.
                                          "loneliness is an invention of the white man, when we are alone we talk to everything around us, we are never alone" (Ojibwa)

                                            Comment

                                            • dalewb74
                                              Service Manager

                                              Site Contributor
                                              1,000+ Posts
                                              • Feb 2018
                                              • 1125
                                              #12
                                              Re: "Set Fusing unit Correctly" will not go away

                                              have you looked at 5810?

                                                Comment

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