A1706 820-00239 u3100 #52 solder pad lost

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  • liteott
    Member
    • Mar 2012
    • 23
    • usa
    #1

    A1706 820-00239 u3100 #52 solder pad lost

    Try to Replace U3100 (CD3215C00 chip) it was pad #62 ppbus_g3hot short to Ground (CB300 take out still short) after remove off the U3100 "short" disappear.
    But for maybe temperature not enough high I found the solder pad #6 #50 #52 was lost and the #6 and #50 are GND I don't care but the #52 shows
    "NC_USBC_XA_RESET_L" and I want to see where this point to go or come but the board view shows no-where to go or come.
    Can you help me what this" NC_USBC_XA_RESET_L" to do and if I replace new ic chip without this #52 pad should the board working? (I already change two times and not work: the power meter go black nothing I don't know if it's bad soldering work or this #52 pad missed.(maybe it was bad soldering because under the ic chip there a thick glue layer before I didn't clean maybe some pad point not making contacted.
    and if it is #52 pad lost problem how can I resolve it
    Attached it the board view and schematic. many thanks.
    Attached Files
    Tags: None
    • Harryrepair
      Senior Member
      • Jul 2016
      • 82
      • Germany
      #2
      Re: A1706 820-00239 u3100 #52 solder pad lost

      NC means not connected, you can solder the chip on without pad #52

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