Welcome to the NEW iPad Rehab Forum! Everyone is welcome to read posts and learn for free. If you'd like to post your own question on the forum, please click "register" above or go here: to enroll as a paid subscriber for $29/mo for unlimited access to our forum support and private signature failure section.
See more
See less

iphone 7 plus Audio IC repair gone wrong

  • Filter
  • Time
  • Show
Clear All
new posts

  • iphone 7 plus Audio IC repair gone wrong

    This board has NO evidence of prior work and with the exception of the Audio IC repair tested fine

    I've done about 6 audio IC repairs before this one, maybe more
    But after I completed this repair on testing ….
    on connection with known good parts USB immediate current draw 380mA no image, no boot
    DCPS before PTB 730mA

    I desoldered my Audio IC and reconnected to DCPS
    same as before DCPS before PTB immediate current draw 730mA
    The board does get hot.

    Did a seated resistance check on VDD_MAIN - 0.371 which looks ok

  • #2
    What is diode mode on vdd_boost line?


    • #3
      Diode mode on vdd_boost was close to a dead short. Freeze spray revealed the boost IC was getting hot first. I desoldered it and diode mode reading became 0.432.
      Soldered on a boost IC - phone booted fine. Problem solved. Thanks