820-01521 no power

Discussion in 'Computer Hardware Repair' started by adriandsl, Jul 6, 2019.

  1. adriandsl

    adriandsl Well-Known Member

    Joined:
    Jun 9, 2019
    Messages:
    5
    Likes Received:
    1
    Most rails are present except _S5 ones, T2 chip gets hot slowly while plugged in charger.
    From what I see _S5 rails are created from 338S00267 PMIC.
    Anyone had similar issue?
     
    #1 adriandsl, Jul 6, 2019
    2. Loading...

    Similar Threads - 01521 power Forum Date
    MacBook Air 13" Retina 2018 820-01521-02 BIOS/UEFI Nov 11, 2018
    Pioneer W10 Tablet Xpower Tablet | Smartphone Jul 11, 2019
    M7X0S-SU POWER SEQENCE.pdf Computer Hardware Repair Jul 6, 2019
    Acer aspire 5735z no power Computer Hardware Repair Jun 11, 2019
    HP Elitebook x360 1030 G3 Power On Authentication Password reset? BIOS/UEFI Apr 4, 2019

  2. 41ifix

    41ifix Well-Known Member

    Joined:
    Mar 22, 2018
    Messages:
    166
    Likes Received:
    10
    wet?
     
    #2 41ifix, Jul 8, 2019
  3. adriandsl

    adriandsl Well-Known Member

    Joined:
    Jun 9, 2019
    Messages:
    5
    Likes Received:
    1
    #3 adriandsl, Jul 8, 2019
    Last edited: Jul 8, 2019
  4. 41ifix

    41ifix Well-Known Member

    Joined:
    Mar 22, 2018
    Messages:
    166
    Likes Received:
    10
    #4 41ifix, Jul 8, 2019
  5. 41ifix

    41ifix Well-Known Member

    Joined:
    Mar 22, 2018
    Messages:
    166
    Likes Received:
    10
    Hablas español?
     
    #5 41ifix, Jul 8, 2019
  6. adriandsl

    adriandsl Well-Known Member

    Joined:
    Jun 9, 2019
    Messages:
    5
    Likes Received:
    1
    No, english.
     
    #6 adriandsl, Jul 8, 2019
  7. adriandsl

    adriandsl Well-Known Member

    Joined:
    Jun 9, 2019
    Messages:
    5
    Likes Received:
    1
    Updated document.
     
    #7 adriandsl, Jul 8, 2019
  8. 41ifix

    41ifix Well-Known Member

    Joined:
    Mar 22, 2018
    Messages:
    166
    Likes Received:
    10
    You should follow the line PP3V3_S5, it is strange that you do not have the signal there.
    Did you use diode mode with red terminal in GND and terminal COM in coil?
     
    • Like Like x 1
    #8 41ifix, Jul 8, 2019
  9. adriandsl

    adriandsl Well-Known Member

    Joined:
    Jun 9, 2019
    Messages:
    5
    Likes Received:
    1
    Yes, I updated the measurements.
     
    • Like Like x 1
    #9 adriandsl, Jul 8, 2019
  10. 41ifix

    41ifix Well-Known Member

    Joined:
    Mar 22, 2018
    Messages:
    166
    Likes Received:
    10
    With power supply, inject in PP3V3_S5 | 3V and see if it consumes / heats any component.
     
    #10 41ifix, Jul 9, 2019
(You must log in or sign up to post here.)
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Accept Learn More...
    Dismiss Notice