Connect with us

How to remove D-Protection on LG Home theater

Discussion in 'General Electronics Discussion' started by Enoch, Oct 1, 2018.

  1. Enoch

    Enoch

    1
    0
    Oct 1, 2018
    I have being using my LG Home theater for close to a year now. But unfortunately this night my wife was looking movies, she switched it off and later when we tried to put it on again, its come on and few Seconds later it show D-PROTECTION.

    Please help me to remove the D-PROTECTION on my DVD LG Home Theater LHD655

    NO SIGN OF BURNING
     

    Attached Files:

  2. dave9

    dave9

    795
    186
    Mar 5, 2017
    D-Prot appears to be a generic error message that does not indicate a single cause. I'd unplug it from the wall outlet then turn on to see if it goes away, otherwise opening the unit and looking for faults, or is that what you did when you wrote "no sign of burning"? Did you also look for failed capacitors, domed on top or leaking?

    Since this is a DVD and amp all in one, I would look closer at the amp portion first, though for the power rating and size it is probably a class D amp which can be a little more work to reverse engineer and trace the circuit. That might begin with determining the amp chip and getting the datasheet, then measuring signal to its input pins, signal out of its output, and power input.

    If there is an active protection circuit as there seems to be, it may have shut down the output so you could look for shorts including output transistors if the amp chip does not have that last stage of transistors built in.
     
    Herve and Enoch like this.
  3. Harald Kapp

    Harald Kapp Moderator Moderator

    9,306
    1,889
    Nov 17, 2011
    Herve likes this.
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-