Bypass power switch

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  • kthorpe88
    Member
    • Nov 2017
    • 32
    • United States

    #1

    Bypass power switch

    Hello all,

    I have a sanyo fw65d25t that I picked up from someone who knows how a screw driver works. He said the picture just would take longer and longer to come on and then one day it stopped. Well he tried to look at and managed to get the back cover off and wreck the power switch button.

    So the indicator light comes on when its plugged in, I can't get it to turn on with a universal remote. He did say the back-light still worked just no picture. I'm wondering if their is a way to solder some jumper wires some place to turn it on with a switch?

    Or do I have another issue? I did check all the caps and voltage regs. The voltage reg on the FRC board that is 1117a does not have conductivity to ground at all on any of the 3 pins? Nor does the top tab/pin.
    Attached Files
  • goontron
    5000!
    • Dec 2011
    • 4108
    • US

    #2
    Re: Bypass power switch

    Unfortunately, no. jumping out the switch won't force it to turn on, the CPU needs a whole sequence of events to startup.
    Things I've fixed: anything from semis to crappy Chinese $2 radios, and now an IoT Dildo....

    "Dude, this is Wyoming, i hopped on and sent 'er. No fucking around." -- Me

    Excuse me while i do something dangerous


    You must have a sad, sad boring life if you hate on people harmlessly enjoying life with an animal costume.

    Sometimes you need to break shit to fix it.... Thats why my lawnmower doesn't have a deadman switch or engine brake anymore

    Follow the white rabbit.

    Comment

    • dskall
      Badcaps Legend
      • Oct 2016
      • 2905
      • usa

      #3
      Re: Bypass power switch

      Fixing the switch is not going to fix the problem. Since the switch was broken taking it apart to find out why it doesn't work.

      Need voltages from connector that goes from power supply board to main board. Will need pin#- PIN DESCRIPTION -Pin voltage in standby-Pin voltage when pushing power button and picture of connector on power supply board.
      Format:
      Pin# - Pin Description - Pin Voltage standby - Pin voltage power on
      1 - XXXXXXX - XXv - XXXv
      2 - XXXXXXX - XXXv - XXXv
      3 - XXXXXXX - XXXv - XXXv
      4 - etc.
      I assume no responsibility for any stupid suggestions I might post.

      Comment

      • Andrew F. Ali
        Badcaps Legend
        • Jan 2014
        • 2450
        • Trinidad & Tobago

        #4
        Re: Bypass power switch

        If the switch is an open/close type switch, there will be two (2) contacts that can be permanently bridged to put the switch in the closed position. However. if it is a momentary type micro-switch, then NO you can't put a permanent bridge but can use a temporary bridge to momentarily close the switch to trigger the power ON mode.

        Comment

        • kthorpe88
          Member
          • Nov 2017
          • 32
          • United States

          #5
          Re: Bypass power switch

          Ok so in picture 1 is the IR&LED CON10 and the Key CN6. The pin voltages are as follows.

          *PIC1
          *CN10 goes to IR&LED board
          L to R
          3.2v, 3.2v
          3.3v, 3.2v
          GND
          NC - 5.2v
          5.2v, 5.2v

          *CN6 Key
          (Goes to power button asm that the other guy wrecked)
          L to R
          3.2v, 3.2v
          3.3v, 3.2v
          NC - 5.2v
          5.2v, 5.2v

          *Pic 2
          *the first red connector (CN5 AMP PWR)
          L to R
          VR PWR, 12v
          VR PWR, 12v
          GND
          GND

          *Second red connector
          L to R
          55v
          5.2v
          GND

          *Big white connector (CN2 Main PWR)
          L to R
          12v
          GND
          5.2v
          5.2v
          5.2v
          5.2v
          GND
          GND
          4.8v
          5.2v

          *Pic 3
          *CN3
          GND
          GND
          GND
          GND
          LVCC - 12v
          HVCC - 55v?
          HVCC - 55v?
          HVCC - 55v?

          *Pic 4
          *CN4
          GND
          GND
          V PWR - 12v
          V PWR - 12v

          *CN1
          VR PWR - 12V
          VR PWR - 12V
          GND
          GND
          GND
          5.2V - 5.2V
          5.2V - 5.2V
          VSTB - 5.2V
          PWON - 4.8V
          5.2V - 5.2V
          5.2V - 5.2V
          GND
          GND

          *PIC 6
          Power supply

          *PIC 7
          Key/PWR button asm

          Other pics are just of all the boards.

          Hope this helps and gives some insight.
          Attached Files
          Last edited by kthorpe88; 11-22-2017, 02:56 PM.

          Comment

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