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    #1

    asus k50ij dead

    hello,
    i have an asus k50ij with no led lights and no charging;there is only +19V and 3,3v for EC also EC_reset but no VSUS_ON.
    I have checked the EC inputs everything seems to be ok...AC_IN_OC# is 3,3v...EC clock is 32 Khz..
    I would change the EC but i want to be sure that EC is defective...
    Any hint?
    Could be the bios chip?I am not sure that the EC needs bios to rise up the VSUS_ON signal.
    Waiting for your opinions...

    Best regards.
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    #2
    Re: asus k50ij dead

    Try charger IC MB39A132 and related FETs

    Comment

      #3
      Re: asus k50ij dead

      Could you measure a high level at pin 19 (VSUS_ON) of IT8502?. (U3001)
      If so, did this voltage gets to J8111 to reach VSUS_ON_PWR point?
      (VSUS_ON--> VSUS_ON_PWR--> ENBL)
      This mobo has JP8113 pads, to POWER TEST the pwm circuit of 3,3 and 5 volts.
      Check and post results.

      Comment

        #4
        Re: asus k50ij dead

        Originally posted by koresi View Post
        hello,
        i have an asus k50ij with no led lights and no charging;there is only +19V and 3,3v for EC also EC_reset but no VSUS_ON.
        I have checked the EC inputs everything seems to be ok...AC_IN_OC# is 3,3v...EC clock is 32 Khz..
        I would change the EC but i want to be sure that EC is defective...
        Any hint?
        Could be the bios chip?I am not sure that the EC needs bios to rise up the VSUS_ON signal.
        Waiting for your opinions...

        Best regards.
        Check if you get 3.3v at RSMRST#.

        Comment

          #5
          Re: asus k50ij dead

          Originally posted by Francisco.s View Post
          Could you measure a high level at pin 19 (VSUS_ON) of IT8502?. (U3001)
          If so, did this voltage gets to J8111 to reach VSUS_ON_PWR point?
          (VSUS_ON--> VSUS_ON_PWR--> ENBL)
          This mobo has JP8113 pads, to POWER TEST the pwm circuit of 3,3 and 5 volts.
          Check and post results.
          no,there is no voltage on pin 19 of IT8502.

          Comment

            #6
            Re: asus k50ij dead

            Originally posted by whaldsz View Post
            Check if you get 3.3v at RSMRST#.
            i did not checked the RSMRST# signal,but i think it becomes active after VSUS_ON and SUSPWRGOOD.
            I will check and tell you.
            thanks.

            Comment

              #7
              Re: asus k50ij dead

              Originally posted by Francisco.s View Post
              Could you measure a high level at pin 19 (VSUS_ON) of IT8502?. (U3001)
              If so, did this voltage gets to J8111 to reach VSUS_ON_PWR point?
              (VSUS_ON--> VSUS_ON_PWR--> ENBL)
              This mobo has JP8113 pads, to POWER TEST the pwm circuit of 3,3 and 5 volts.
              Check and post results.
              I've the same board with the same problem, I solder the test pad JP81113 to power on the PWM U8101 ( RT8206AGQW ) but nothing happens, I've checked the power mosfets that the U8101 controls but are ok. Also I replace the PWM by other compatible ISL6236 but nothing.

              I solder the test pad because I don't have the ENBL signal.

              Comment

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