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Hitachi TV power problem

Discussion in 'Electronic Basics' started by Mike C, Sep 3, 2005.

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  1. Mike C

    Mike C Guest

    Folks,

    Can anybody point me in the right direction?

    My daughter has a Hitachi model C1719T TV receiver with a problem. Nothing
    appears on the screen - it remains completely black. I don't know if this
    screen has a cold cathode (do you get such TV tubes?), but I can't see any
    heater coming on, and I can't find any voltage around the tube base. It
    generates UHT, however, because I hear it whistle momentarily when the power
    is switched off.

    Although I have fixed my own TV several years ago (thanks to a guy called
    Sam who was a regular contributor to the group!), I don't know much outside
    of the theory of TV's, and when I look at the board, I don't know enough to
    recognise where the various circuit elements are - and I don't have a
    schematic for it.

    With the back of the board towards me and the components on the top, the
    mains cable comes in on the left side, but I can't even find the rectifier.
    Is it a 4-pin chip, or does it use discrete diodes? Is it near to the mains
    cable and the fuse? It would make sense!

    Any pointers will be appreciated.

    Thanks,

    Mike.

    --
    WARNING: My e-mail return address is bogus to confuse the automated spam
    address gatherers.
    Mental decryption required:
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  2. Chris

    Chris Guest

    Hi, Mike. Try posting at sci.electronics.repair. They might be able
    to give you a few pointers there.

    Chris
     
  3. Is there any sound?

    Tom
     
  4. Mike C

    Mike C Guest

    Thanks for the reply, Tom,

    No, there is no sound. Basically, it no longer has much to offer in the way
    of entertainment! :)

    Regards,

    Mike.
     
  5. Then it is likely power supply/horizontal deflection.

    Tom
     
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