High Voltage Unit A5C1M4070

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  • iraklis7302
    Technician

    50+ Posts
    • Jan 2022
    • 54
    #1

    High Voltage Unit A5C1M4070

    Hi there,

    is there anybody who replaced the high voltage unit?i heared that this board is responsible for destroying the developer unit.is it true?in my c364 machine i replaced the magenta developer unit and in a week the magenta had to be replaced.i changed the high voltage unit and now the machine is working good.i ,measured the components on this board but everything seems to be ok.probably some transformer is bad but i dont know.could anyone hear this problem?

    thank you all!
    Tags: developer, high, unit, voltage
    • tmmdmmm
      Trusted Tech

      Site Contributor
      100+ Posts
      • Apr 2021
      • 173
      #2
      Re: High Voltage Unit A5C1M4070

      Originally posted by iraklis7302
      Hi there,

      is there anybody who replaced the high voltage unit?i heared that this board is responsible for destroying the developer unit.is it true?in my c364 machine i replaced the magenta developer unit and in a week the magenta had to be replaced.i changed the high voltage unit and now the machine is working good.i ,measured the components on this board but everything seems to be ok.probably some transformer is bad but i dont know.could anyone hear this problem?

      thank you all!
      Yeah, I actually have one ready to go in a machine as a preventative for repeated C dev failures, of course that C dev is a month or so out though.

      If you've already cleaned all the HV terminals and replaced the dev/drum as a combo (to avoid chasing "Oh its a drum, oh its a dev, oh its a drum" etc.) then the HV is the next logical step.

        Comment

        • iraklis7302
          Technician

          50+ Posts
          • Jan 2022
          • 54
          #3
          Re: High Voltage Unit A5C1M4070

          Originally posted by tmmdmmm
          Yeah, I actually have one ready to go in a machine as a preventative for repeated C dev failures, of course that C dev is a month or so out though.

          If you've already cleaned all the HV terminals and replaced the dev/drum as a combo (to avoid chasing "Oh its a drum, oh its a dev, oh its a drum" etc.) then the HV is the next logical step.
          ok thank you.is there any way to fix the HV board?could i replace any electronic component?thank you again

            Comment

            • blackcat4866
              Master Of The Obvious

              Site Contributor
              10,000+ Posts
              • Jul 2007
              • 22694
              #4
              Re: High Voltage Unit A5C1M4070

              I've had a couple "8" series machines suck all the developer out of the cyan or magenta developing units ... and it happens quickly! Perhaps 20seconds of idling on the new developing unit and its empty. In both cases it was the HVT.

              And no, I don't know what goes wrong with the HVT. =^..^=
              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

                • REGSIS
                  Trusted Tech

                  250+ Posts
                  • May 2016
                  • 434
                  #5
                  Re: High Voltage Unit A5C1M4070

                  Originally posted by iraklis7302
                  Hi there,

                  is there anybody who replaced the high voltage unit?i heared that this board is responsible for destroying the developer unit.is it true?in my c364 machine i replaced the magenta developer unit and in a week the magenta had to be replaced.i changed the high voltage unit and now the machine is working good.i ,measured the components on this board but everything seems to be ok.probably some transformer is bad but i dont know.could anyone hear this problem?

                  thank you all!
                  In last couple of months I replaced many ozone filters (4 seriss) as a preventive countermeasure for cyan dev leak in addition to lowering TCR ratio to -1 for C and M.
                  I cleaned drum unit and dev unit. Vacuum ventilation port for cyan dev at the back.
                  In case of dev missing I run the halftones to refill new toner with developer to regenerate brush on magnet roller.

                  So far none reported a problem.

                    Comment

                    • tsbservice
                      Field tech

                      Site Contributor
                      5,000+ Posts
                      • May 2007
                      • 7629
                      #6
                      Re: High Voltage Unit A5C1M4070

                      Originally posted by REGSIS
                      In last couple of months I replaced many ozone filters (4 seriss) as a preventive countermeasure for cyan dev leak in addition to lowering TCR ratio to -1 for C and M.
                      I cleaned drum unit and dev unit. Vacuum ventilation port for cyan dev at the back.
                      In case of dev missing I run the halftones to refill new toner with developer to regenerate brush on magnet roller.

                      So far none reported a problem.
                      +1 on this. Good prevention plan I do pretty much the same.
                      A tree is known by its fruit, a man by his deeds. A good deed is never lost, he who sows courtesy, reaps friendship, and he who plants kindness gathers love.
                      Blessed are they who can laugh at themselves, for they shall never cease to be amused.

                        Comment

                        • Toxic
                          Senior Tech

                          500+ Posts
                          • Dec 2009
                          • 690
                          #7
                          Re: High Voltage Unit A5C1M4070

                          To all this already written i will just add to check hv wires when replacing hv board.

                            Comment

                            • iraklis7302
                              Technician

                              50+ Posts
                              • Jan 2022
                              • 54
                              #8
                              Re: High Voltage Unit A5C1M4070

                              Originally posted by REGSIS
                              In last couple of months I replaced many ozone filters (4 seriss) as a preventive countermeasure for cyan dev leak in addition to lowering TCR ratio to -1 for C and M.
                              I cleaned drum unit and dev unit. Vacuum ventilation port for cyan dev at the back.
                              In case of dev missing I run the halftones to refill new toner with developer to regenerate brush on magnet roller.

                              So far none reported a problem.
                              ok thank you i will try

                                Comment

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