Akai LCT3201AD

Collapse
X
Collapse
 
  • Page of 2
  • Time
  • Show
Clear All
new posts
Previous 1 2 template Next
  • trains58554
    Senior Member
    • Apr 2012
    • 55
    • USA
    #21
    Re: Akai LCT3201AD

    I have checked fuses f1 and f2 in the last picture. Are there more that I did not see? I also just saw f3 and checked it and it is good.
    Last edited by trains58554; 10-01-2012, 11:11 AM.

      Comment

      • trains58554
        Senior Member
        • Apr 2012
        • 55
        • USA
        #22
        Re: Akai LCT3201AD

        I did some more testing of sorts. I unpluged all of the ccfls and then powered up the tv and it works. I also tried it with just one ccfl and it shut down. I also tried with just one half and it just shut down.

          Comment

          • budm
            Badcaps Legend
            • Feb 2010
            • 40746
            • USA
            #23
            Re: Akai LCT3201AD

            The inverter circuits will shutdown if during the first 3 seconds if it does not detect one lamp or more do not fire up, or if it detects that any one of the lamps fire up but does not stay on, or of the lamp draws too much current. It will also shut down if the circuits is drawing too much current due to shorted MOSFET's, bad transformers
            Last edited by budm; 10-01-2012, 12:43 PM.
            Never stop learning
            Basic LCD TV and Monitor troubleshooting guides.
            http://www.badcaps.net/forum/showthr...956#post305956

            Voltage Regulator (LDO) testing:
            http://www.badcaps.net/forum/showthr...999#post300999

            Inverter testing using old CFL:
            http://www.badcaps.net/forum/showthr...er+testing+cfl

            Tear down pictures : Hit the ">" Show Albums and stories" on the left side
            http://s807.photobucket.com/user/budm/library/

            TV Factory reset codes listing:
            http://www.badcaps.net/forum/showthread.php?t=24809

              Comment

              Previous 1 2 template Next

              Related Topics

              Collapse
              • Tynan Dill
                Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?
                by Tynan Dill
                I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.

                Upon bringing it home and plugging it up, it showed a standby light.

                I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.

                The screen seems to blackout and stay black, but with a flashlight I can see the display.

                With my Playstation 4 connected via HDMI, and running a game I can hear sound.

                Assuming...
                ORIGINAL POWER SUPPLY BOARD
                7 Photos
                11-22-2024, 01:46 PM
              • sumilumi
                700mv ripple on Akai Sampler linear supply
                by sumilumi
                Hi fellow troubleshooters. This is my first post on badcaps. I've recently setup an electronics workbench. i'm also building a studio with old equipment bought faulty at low cost.
                I've been into electronics since the mid 80's and particularly in the last few years though only getting hands on with repairs now. My knowledge gaps are significant so I'll be posting here to seek guidance advice and general practical applied learning.

                On my bench today is an old ca. 1993-95 Akai hardware sampler. This runs on both a linear and Smps supply. Both are getting on in age and ripple...
                01-02-2022, 10:12 AM
              • sam_sam_sam
                Modification to a ZD-987 desoldering/soldering station using a external switching power supply
                by sam_sam_sam
                I have been working on this concept for quite some time now with limited success but recently I found a switching power supply that is setup for the voltage that this soldering station needs to operate at however it also needs part of the secondary circuit from the original switching power because you need several voltage rails

                I once tried to get a ZD-915 desoldering station to work on a 18 volt battery power supply but unfortunately things did not go well but I did find a work around but I might try this idea again but going at a little differently more about this another time...
                07-01-2024, 06:34 AM
              • CMCM
                Russound CA4 Power Supply Repair
                by CMCM
                Hello Everybody,

                Trying to repair a power supply from a Russound CA4 Multizone Controller (picture attached)

                Russound no longer supports it but were kind enough to provide a schematic of the power supply (pdf attached).

                The outputs marked 12v and 20v are all measuring only 1v.

                The board is clicking, which I think means it is in something called hiccup mode when the flyback transformers switches because of an internal problem or something else on the board Overloading it.

                The capacitors physically look clean (no bludgesor leaks) and...
                07-03-2025, 01:12 PM
              • JimBanville
                Definitive technology SC 2000 subwoofer amp's power supply clicking and popping
                by JimBanville
                The sub developed a constant popping every couple seconds from woofer and power LED flickering with nothing but wall AC connected. Connecting an audio cable didn't change anything. It doesn't play but a second or two of audio in between the pops.
                Opened it up and discovered the power supply is making a faint clicking or ticking sound.
                I measured the amp's output to the woofer and it pulses up to 50mv DC to be driver. The pulses coincide with the power supply ticking/clicking.
                I measured the power supply output going to the amp board and it too has this pulsing. Voltage cycles...
                09-13-2023, 07:21 AM
              • Loading...
              • No more items.
              Working...