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Help on Sony video recorder GV-S50E

Discussion in 'Troubleshooting and Repair' started by Manel Avella, Dec 28, 2014.

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  1. Manel Avella

    Manel Avella

    Dec 28, 2014
    My charger no longer works. when I plug it into the electricity, there is a strong clicking sound on the charger.
    I plugged the recorder onto another charger of the same power and still does not work, so apart from the charger the recorder is also faulty.
    I wish I could at least get the recorder to work and i thought that perhaps there is a fuse that could be blown. I found the service manual on but it looks very complicated. I just would like to know if perhaps there is an inside fuse that is blown and I could change it myself.
    I took it already to couple of technicians and they did not want to get involved.
    I like this machine. Could someone help, please.
    Many thanks.
  2. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

    Nov 28, 2011
    Hi there Manel and welcome to Electronics Point :)

    Sorry about the slow response!

    I got a copy of the service manual from elektrotanya but it doesn't seem to have any information on the external charger. Please tell me if I'm missing something here.

    A rapid clicking sound from a switching power supply is called "hiccuping" and it's caused by one of the safety circuits activating. The power supply starts up, then at a certain point, the current or voltage exceeds the safety limit, and the safety circuit kicks in, shutting the power supply down. Then it starts up and tries again. This can happen pretty quickly, leading to a clicking or even a low-pitched buzzing sound.

    There are several types of faults that can cause this symptom. Blown fuses are not generally one of them. It may be as simple as a shorted diode in the output circuit, or even just an electrolytic, but it may require some diagnosis.

    If you want to fix it, we will help, but we need you to understand that switching power supplies are potentially very dangerous. The live side has a voltage of at least 160V DC, often 320V DC, both of which can kill you if you connect yourself across it the wrong way! You need to be very careful making measurements when the power supply is running. Initially your measurements can be made with it unplugged, but the large cylindrical electrolytic(s) (one or two of them, usually) can store enough energy to kill you, and they may need to be discharged.

    The best way to discharge them is with a power resistor of about 10 kΩ rated for 5W (see which you connect across each capacitor for at least 20 seconds (making sure you don't touch either of the wires - or the resistor, as it will get hot for a short time). But you can just short it out with an insulated screwdriver (as long as you don't mind a loud BANG! and a chunk being taken out of the screwdriver and the pin)!

    The capacitors often have a "bleeder resistor" across them, which will discharge them within 5~10 minutes after the power has been removed.

    You will also need a multimeter and basic knowledge of how to use it.

    Are you confident you can work safely on the power supply and make measurements? If so, open it up and upload some photos of both sides of the board. See for guidelines on how to take good useful photos.

    Edit: In your original post you say the recorder unit, not the power supply, is the problem, and you know this because you've tried a different power supply. How sure are you that the power supply you tried was working, and had the right voltage and current ratings and the right polarity on the connector? My first suspicion is that you should fix the power supply that's supposed to work with that unit, then see if the unit works.
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