Announcement

Collapse
No announcement yet.

Acer da0zq0mb6e0 rev e no power

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    Acer da0zq0mb6e0 rev e no power

    Board has no reading if plug with powersupply, PU1 reading
    I really need help about this board

    ACN -18V
    ACP-18V
    ACOK-0V
    LCDRV-0V
    ACDET-2.5V
    REGN-5.9V
    VCC-18V

    (BQ24737RGRR)
    SCHEMATIC IS ATTACHED
    Attached Files

    #2
    Re: Acer da0zq0mb6e0 rev e no power

    Everything is fine here. Measure power rails.
    OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

    Comment


      #3
      Re: Acer da0zq0mb6e0 rev e no power

      Originally posted by piernov View Post
      Everything is fine here. Measure power rails.
      I've check the 3v and 5v ic

      In pin 8 I get 5V but inthe PL3 has no voltage output
      Vin- 18v
      EN1-3.5V
      pgood- 0V
      drvh1- 0v
      VREG3- 3.3V
      VREG5- 5V
      EN2-3.3V

      Comment


        #4
        Re: Acer da0zq0mb6e0 rev e no power

        You can't test the SW/DRV outputs with a multimeter, use an oscilloscope. If DRVH2 isn't generating PWM signals, the controller is dead and should be replaced. The 5V you're seeing on SW2 is not really 5V, it's also a PWM.

        Comment


          #5
          Re: Acer da0zq0mb6e0 rev e no power

          Originally posted by emestee View Post
          You can't test the SW/DRV outputs with a multimeter, use an oscilloscope. If DRVH2 isn't generating PWM signals, the controller is dead and should be replaced. The 5V you're seeing on SW2 is not really 5V, it's also a PWM.
          Thanks fior the response sir but now I dont have any oscilloscope.

          Comment


            #6
            Re: Acer da0zq0mb6e0 rev e no power

            check the impedance of pu3 coil pl2 and pl3

            Comment


              #7
              Re: Acer da0zq0mb6e0 rev e no power

              Originally posted by qayyum786 View Post
              check the impedance of pu3 coil pl2 and pl3
              pl2 1.5kohms
              pl3 1.5k0hms

              Comment


                #8
                Re: Acer da0zq0mb6e0 rev e no power

                Originally posted by kalilinux25 View Post
                pl2 1.5kohms
                pl3 1.5k0hms
                That's normal. Coils do not fail generally. You can use an $20 DSO138 or similar to test PWM drivers - its bandwidth is limited so you won't be able to test eg 33MHz clocks but for testing but PWMs, EC oscillators etc it works (however you need 1:10 probe for oscillators). In my opinion even without testing, given the circuit and your measurements, there is high chance the controller is dead.

                Comment


                  #9
                  Re: Acer da0zq0mb6e0 rev e no power

                  Originally posted by emestee View Post
                  That's normal. Coils do not fail generally. You can use an $20 DSO138 or similar to test PWM drivers - its bandwidth is limited so you won't be able to test eg 33MHz clocks but for testing but PWMs, EC oscillators etc it works (however you need 1:10 probe for oscillators). In my opinion even without testing, given the circuit and your measurements, there is high chance the controller is dead.
                  thanks for the concern on replying , great help ,I ll justo order OSCILLOSPE

                  Comment


                    #10
                    Re: Acer da0zq0mb6e0 rev e no power

                    Originally posted by emestee View Post
                    You can't test the SW/DRV outputs with a multimeter, use an oscilloscope. If DRVH2 isn't generating PWM signals, the controller is dead and should be replaced. The 5V you're seeing on SW2 is not really 5V, it's also a PWM.
                    I already tested the board it has a pmw signal sir,
                    I also test the filterng caps at the PC42 its ok

                    Comment


                      #11
                      Re: Acer da0zq0mb6e0 rev e no power

                      also im missing my 3v in vcc of my sio chip?

                      Comment

                      Working...
                      X