Faulty MPF7409 PSU from Hitachi pd5200 plasma.

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  • japlytic
    Badcaps Legend
    • Oct 2005
    • 2086
    • Australia
    #21
    Re: Faulty MPF7409 PSU from Hitachi pd5200 plasma.

    Originally posted by littlejon
    Regarding the caps this is every thing written on it:

    (M)
    HC CE(M)
    105 C
    270UF
    400V
    Japan

    Would the one you linked me to do the job, the only difference is the max temp is slightly lower 85 c as for all the other value's I have no idea.
    The "M" logo is Panasonic, and the ripple current rating (all sizes of the 270uF 400V Panasonic HC Series) is 1.22A @ 120Hz @ 105C.
    So be sure to get a unit with the same diameter and height.
    My first choice in quality Japanese electrolytics is Nippon Chemi-Con, which has been in business since 1931... the quality of electronics is dependent on the quality of the electrolytics.

      Comment

      • littlejon
        Member
        • Aug 2012
        • 20
        • sweden
        #22
        Re: Faulty MPF7409 PSU from Hitachi pd5200 plasma.

        Thanks Japlytic, found one here:http://uk.rs-online.com/web/p/aluminium/7441795P/

        Seems to match but the hight is 25mm on my PSU board there 30mm I guess this will not matter too much.

          Comment

          • littlejon
            Member
            • Aug 2012
            • 20
            • sweden
            #23
            Re: Faulty MPF7409 PSU from Hitachi pd5200 plasma.

            If any one stumbles upon this thread and has the same problem I managed to fix it, the clicking problem under load was due to the 2 big caps on the middle of the board and not the inverter or coil.

              Comment

              • LDSisHere
                Badcaps Veteran
                • May 2012
                • 727
                • U.S.A.
                #24
                Re: Faulty MPF7409 PSU from Hitachi pd5200 plasma.

                Good save!! Congratulations! Hopefully someone else will find this information useful in the future.

                  Comment

                  • tom66
                    EVs Rule
                    • Apr 2011
                    • 32560
                    • UK
                    #25
                    Re: Faulty MPF7409 PSU from Hitachi pd5200 plasma.

                    Originally posted by littlejon
                    If any one stumbles upon this thread and has the same problem I managed to fix it, the clicking problem under load was due to the 2 big caps on the middle of the board and not the inverter or coil.
                    It is good that you fixed it and supports the theory that the caps going bad is causing the PFC to misbehave causing the clicking, thanks for posting the fix.
                    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                      Comment

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