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HTQ80 all display digits onand no functions work.I have repair manual and am an ET

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  • 3 more comments 
  • racole Jun 29, 2009

    I'll check VCC on display chip and get back to you

    Thanks

  • racole Jun 30, 2009

    Do you agree problem is with front panel ckt bd?

    R.cole

  • racole Jun 30, 2009

    Originaly unit would not turn-on.Diode to vcc of display chip was blown and -34v power supply regulator was bad.
    I agree looks like another ckt bd is required.
    Thanks for your help.

  • racole Jun 30, 2009

    Originaly unit would not turn-on.Diode to vcc of display chip was blown and -34v power supply regulator was bad.
    I agree looks like another ckt bd is required.
    Thanks for your help.

  • racole Jun 30, 2009

    Originaly unit would not turn-on.Diode to vcc of display chip was blown and -34v power supply regulator was bad.
    I agree looks like another ckt bd is required.
    Thanks for your help.

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Hi,
If all digits on front becomes ON when you plug the system in AC then check Vcc to display chip on front board of unit.
I do not have this particular model repair manual and would appreciate if you can email copy to welcomejee@yahoo.com
That will make easy for me to assist you technically.
Thanks.

Posted on Jun 29, 2009

  • 1 more comment 
  • Shahid Electronics
    Shahid Electronics Jun 30, 2009

    I'll check VCC on display chip and get back to you
    Thanks

    ====================================



    Ok, I need repair manual copy to study its circuit and provide you required info like what to test and where to check.

    Thanks.

  • Shahid Electronics
    Shahid Electronics Jun 30, 2009

    Hi again,
    I got your email but there is no attachment file of schematics/ repair manual, resend repair manual pdf file again.
    Please check Reset pin works on same front display chip as there would be reset IC on PCB for that purpose. We need to check Oscillator is working?
    Thanks.




  • Shahid Electronics
    Shahid Electronics Jun 30, 2009

    Do you agree problem is with front panel ckt bd?

    R.cole
    ==========================================
    Yes, as you said symptoms of player, problem is with front display board and specially with front display chip.
    If you can swap board in same model other unit, test this board there.
    Thanks.



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