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Repairing a set top box.

Discussion in 'Electronic Repair' started by moo, Sep 5, 2012.

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  1. moo

    moo Guest

    Hi all, new to this forum an electronic device repair. I have been given
    a few items that are faulty to learn repair on and I currently am
    working on a set top box the picture comes up fine but when I go to scan
    the channels the signal strength is exactly 0 nothing at all, I have
    tested various points on the board for voltage with a fluke and it all
    checks out, the cables are fine. And im assuming the rf modulator box is
    as well because im getting the display on screen when I plug the RF
    cable in from the wall. Just no signal strength. I at a bit of a loss as
    to where to start looking and cant find a service manual online to give
    me any clues. the board is marked as DVB-TH MB04 rev 1.2. Some jaycar
    product bought a few years ago. If someone could please point me in the
    right direction it would be very much appreciated.

    Thanks for your time.
     
  2. moo

    moo Guest

    im assuming the rf modulator box is
     
  3. N_Cook

    N_Cook Guest

    First you have to check whether it has fallen foul of not enough EEprom for
    the current useage,

    "Split NIT "
     
  4. moo

    moo Guest

    Thanks :) I just done a bit of googling about so Im onto this Split NIC
    suggestion. If it is the case is it a matter of rewriting the eeprom, or
    essentially does the change in freeview spec make this a paperweight?
     
  5. moo

    moo Guest


    Thanks :) I just done a bit of googling about so Im onto this Split NIC
    suggestion. If it is the case is it a matter of rewriting the eeprom, or
    does the change in freeview spec essentially make this a paperweight?
     
  6. Adrian C

    Adrian C Guest

    I think 'Spilt NIT' is a UK issue.

    Are you in Australia?
     
  7. moo

    moo Guest

    Yes im from Australia I noticed a few things about the uk having the
    issue but cant find much about Australia.... noticed the tuners are
    quiet loose so im going to take a shot a replacing them and go from
    there.... Thanks for your input.
     
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