oki es3640e major printing faults

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  • Alastair38
    Technician

    Site Contributor
    • Apr 2019
    • 24
    #1

    oki es3640e major printing faults

    we moved an es3640e that was working fine. After it was moved I tested it and there were big problems, the pages had a solid block of cyan for the background and the magenta running in long bands. I replaced all the drums and toner - same problem though, or similar, the cyan disappeared completely on the second PS test sheet. I've attached a few photos, any ideas on where to start looking?

    PS Test Page.jpgPS TEST PAGE 2.jpgDEMO PAGE.jpgCOLOR CAL PAGE.jpg
    Tags: completely, cyan, disappeared, es3640e
    • Blizzoo
      Senior Tech

      Site Contributor
      500+ Posts
      • Aug 2013
      • 588
      #2
      Re: oki es3640e major printing faults

      I had this strange fault and spent hours disassembling and fitting Drum Units, swapped LED units with working ones, replace whole LED ribbon cables, both SYS and Logic boards, Memory module, HDD format, FW updates you name it.

      It was the freaking Transfer Belt causing that - 2 min job. I don't know how and why - no explanation I could think of
      Defects are simple, our mind is complicated

        Comment

        • blackcat4866
          Master Of The Obvious

          Site Contributor
          10,000+ Posts
          • Jul 2007
          • 22703
          #3
          Re: oki es3640e major printing faults

          Originally posted by Blizzoo
          I had this strange fault and spent hours disassembling and fitting Drum Units, Led ribbon cables, both SYS and Logic boards, Memory you name it.

          It was the freaking Transfer Belt causing that - 2 min job. I don't know how and why - no explanation I could think of
          So if it is the primary transfer belt, Alastair should be able to emergency stop the machine, and see the exact same latent image on the belt ... not a good latent image.
          =^..^=
          If you'd like a serious answer to your request:
          1) demonstrate that you've read the manual
          2) demonstrate that you made some attempt to fix it.
          3) if you're going to ask about jams include the jam code.
          4) if you're going to ask about an error code include the error code.
          5) You are the person onsite. Only you can make observations.

          blackcat: Master Of The Obvious =^..^=

            Comment

            • Alastair38
              Technician

              Site Contributor
              • Apr 2019
              • 24
              #4
              Re: oki es3640e major printing faults

              Originally posted by Blizzoo
              I had this strange fault and spent hours disassembling and fitting Drum Units, swapped LED units with working ones, replace whole LED ribbon cables, both SYS and Logic boards, Memory module, HDD format, FW updates you name it.

              It was the freaking Transfer Belt causing that - 2 min job. I don't know how and why - no explanation I could think of
              Thanks, that's easy to check, I'll have a look.

                Comment

                • Alastair38
                  Technician

                  Site Contributor
                  • Apr 2019
                  • 24
                  #5
                  Re: oki es3640e major printing faults

                  It wasn't the transfer belt, I took out the main board and swapped it into a c9800, and now the c9800 prints with exactly the same error - so the problem traveled with the main board, which means it probably isn't something I'm going to be able to fix?

                    Comment

                    • blackcat4866
                      Master Of The Obvious

                      Site Contributor
                      10,000+ Posts
                      • Jul 2007
                      • 22703
                      #6
                      Re: oki es3640e major printing faults

                      If you replaced the main board, then yes, you could fix it. I suspect that you won't be able to repair the damaged board. =^..^=
                      If you'd like a serious answer to your request:
                      1) demonstrate that you've read the manual
                      2) demonstrate that you made some attempt to fix it.
                      3) if you're going to ask about jams include the jam code.
                      4) if you're going to ask about an error code include the error code.
                      5) You are the person onsite. Only you can make observations.

                      blackcat: Master Of The Obvious =^..^=

                        Comment

                        • Blizzoo
                          Senior Tech

                          Site Contributor
                          500+ Posts
                          • Aug 2013
                          • 588
                          #7
                          Re: oki es3640e major printing faults

                          Sorry for misleading. Good to know you found the problem.

                          I was probably misled by the colleague who replaced the Transfer Belt. I hope I can find the samples to upload them here for a opinion.
                          Defects are simple, our mind is complicated

                            Comment

                            • Alastair38
                              Technician

                              Site Contributor
                              • Apr 2019
                              • 24
                              #8
                              Re: oki es3640e major printing faults

                              Originally posted by blackcat4866
                              If you replaced the main board, then yes, you could fix it. I suspect that you won't be able to repair the damaged board. =^..^=
                              If I used the main board from the c9800 and put the HDD and the eeprom from the es3640 on it, would that work? And not change over the key chip, or anything else?

                                Comment

                                • blackcat4866
                                  Master Of The Obvious

                                  Site Contributor
                                  10,000+ Posts
                                  • Jul 2007
                                  • 22703
                                  #9
                                  Re: oki es3640e major printing faults

                                  Originally posted by Alastair38
                                  If I used the main board from the c9800 and put the HDD and the eeprom from the es3640 on it, would that work? And not change over the key chip, or anything else?
                                  Sorry, I don't know. =^..^=
                                  If you'd like a serious answer to your request:
                                  1) demonstrate that you've read the manual
                                  2) demonstrate that you made some attempt to fix it.
                                  3) if you're going to ask about jams include the jam code.
                                  4) if you're going to ask about an error code include the error code.
                                  5) You are the person onsite. Only you can make observations.

                                  blackcat: Master Of The Obvious =^..^=

                                    Comment

                                    • Alastair38
                                      Technician

                                      Site Contributor
                                      • Apr 2019
                                      • 24
                                      #10
                                      Re: oki es3640e major printing faults

                                      Originally posted by blackcat4866
                                      Sorry, I don't know. =^..^=
                                      ok, thanks. I tried it and it wouldn't get past communication error, I thought it would work, in theory. Unless I have two broken main boards, which is a possiblity.

                                        Comment

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