trouble shooting low voltage power on canon IR C2550i

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  • shizam
    Junior Member
    • Sep 2016
    • 6
    #1

    [Error Code] trouble shooting low voltage power on canon IR C2550i

    Hi All,

    Second attempt on this post so apologies if it ends up double posting.

    I have an IR2550i which fails to warm up when the power is switched on. It halts, maybe a second or two after power is switched on with either a 227-001 or 227-004 error, depending on whether or not the reader "twitches" once on power up.
    I have disconnected , cleaned, and reconnected all the PCI cards and ram on the mainboard as I was originally getting random errors including a 747, but now only get the 227 errors.

    The one time I managed to get it to startup, after I cleaned all the connections on the main board, it had a false message about the front door being open, then the side door when they were both closed.

    How can I troubleshoot the low voltage power to see if it requires a new low voltage power supply?
    The symptoms sound exactly like the FM3-8179-010, technical bulletin ref F2-T01-N13-10061-01? for the 2020i series, but I think I have a different LVPS configuration/PCB.


    Any tips on diagnosing if it needs a new power supply?
    It seems, on the 2550i, that the LVPS is part of the Main power supply "module" bottom right in the back of the machine.

    Thanks!
    Tags: error 227. 2550i, low voltage, lvps
    • shizam
      Junior Member
      • Sep 2016
      • 6
      #2
      Re: trouble shooting low voltage power on canon IR C2550i

      I can't seem to track down a service manual for this machine, but I do have a 3380/2880 series service manual which, I think, is similar, however the PCB part numbers do not match whats in my machine...

        Comment

        • teckat
          Field Supervisor

          Site Contributor
          10,000+ Posts
          • Jan 2010
          • 16083
          #3
          Re: trouble shooting low voltage power on canon IR C2550i

          Replace power supply

          U probably have a poor 24v.
          Check the connections__remove>reseat.
          Check 24v
          **Knowledge is time consuming, exhausting and costly for a trained Tech.**

            Comment

            • shizam
              Junior Member
              • Sep 2016
              • 6
              #4
              Re: trouble shooting low voltage power on canon IR C2550i

              tried reseating all connections with no luck.
              Replaced the power supply and all is working AOK.

              Thanks

                Comment

                • teckat
                  Field Supervisor

                  Site Contributor
                  10,000+ Posts
                  • Jan 2010
                  • 16083
                  #5
                  Re: trouble shooting low voltage power on canon IR C2550i

                  Originally posted by shizam
                  tried reseating all connections with no luck.
                  Replaced the power supply and all is working AOK.

                  Thanks

                  Welcome :-))
                  **Knowledge is time consuming, exhausting and costly for a trained Tech.**

                    Comment

                    • shizam
                      Junior Member
                      • Sep 2016
                      • 6
                      #6
                      Re: trouble shooting low voltage power on canon IR C2550i

                      Seems like such a waste.
                      The whole new power supply has a cage, and 2 PCBs full of components. It looks like a single big diode on the old board failed/overheated causing all the problems....but no time to troubleshoot component level repairs!

                      Image quality is great and the machine is quite low mileage......now that I can turn it on!


                      Cheers
                      S

                        Comment

                        • teckat
                          Field Supervisor

                          Site Contributor
                          10,000+ Posts
                          • Jan 2010
                          • 16083
                          #7
                          Re: trouble shooting low voltage power on canon IR C2550i

                          Originally posted by shizam
                          Seems like such a waste.
                          The whole new power supply has a cage, and 2 PCBs full of components. It looks like a single big diode on the old board failed/overheated causing all the problems....but no time to troubleshoot component level repairs!

                          Image quality is great and the machine is quite low mileage......now that I can turn it on!


                          Cheers
                          S


                          A+ C-.jpg

                          Think of a diode as a one-way street for electricity. When the diode is in forward bias, the diode allows traffic, or current, to flow from the anode, towards the cathode leg. In a reverse bias current is blocked so there is no flow of electricity through the circuit.
                          When current is flowing through a diode, the voltage on the positive leg is higher than on the negative leg, this is called the diode's                           forward voltage drop. The severity of the voltage drop is a function of the semiconductor material that the diode is made from.
                          When the voltage across the diode is positive, a lot of current can flow once the voltage becomes large enough. When the voltage across the diode is negative, virtually no current flows.
                          **Knowledge is time consuming, exhausting and costly for a trained Tech.**

                            Comment

                            • shizam
                              Junior Member
                              • Sep 2016
                              • 6
                              #8
                              Re: trouble shooting low voltage power on canon IR C2550i

                              More precisely, the component is a rectifier/SIP ul bridge. So like 3 diodes in a single package . I haven't confirmed it for sure, but it definitely looks smoked!

                              component part is a D15XB60, 4 pin SIP.

                              all academic now though as I have another power supply working well.

                                Comment

                                • teckat
                                  Field Supervisor

                                  Site Contributor
                                  10,000+ Posts
                                  • Jan 2010
                                  • 16083
                                  #9
                                  Re: trouble shooting low voltage power on canon IR C2550i

                                  Originally posted by shizam
                                  More precisely, the component is a rectifier/SIP ul bridge. So like 3 diodes in a single package . I haven't confirmed it for sure, but it definitely looks smoked!

                                  component part is a D15XB60, 4 pin SIP.

                                  all academic now though as I have another power supply working well.

                                  **Knowledge is time consuming, exhausting and costly for a trained Tech.**

                                    Comment

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