Lg pc503d ps problems

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  • NasTech
    Senior Member
    • Sep 2011
    • 58
    #1

    Lg pc503d ps problems

    I follow the post with PC503D issues

    The Problem am having is the tv when the power button is press the front led goes from red, green then back red. It startups ones then shutsdown. The voltages i read on P800 Connector


    Press Power Stutsdown
    P800 PINS

    4.83v 1. AC-D 4.85V
    4.53V 2. RL-ON 0V
    5.03 3. STANDBY 5.04V
    3.6V 5. VS-ON 0V
    4.66V 6. 5V-D 0V
    5.02V 7. M5V-ON 0V
    5.03V 8. STANDBY 5.05V
    3.32V 10. NC 3.34V
    5.98V 11. 6V 0V
    4.53V 13. 3.3V 0V


    The Connector P802/P803 Voltages startup then stutsdown.

    But i'll disconnect y-sus cables from PS the voltages Vs-230v then drop fast and stay at 4v, Va-66v then drop fast to 0v but the 5v-4.98 and stays there.


    Next I disconnected P800 from the main Board jump 470 resistors from standby to rl-on and m5-on PS voltages reading 6v-6v, 12v-12v, 19v-19v, 3.3v-0v, Vs-0v,Va-0v and 5v-5v

    Disconnected P804 & P805 voltages reading 6v-6v, 12v-10v, 19v-17v, 3.3v-0v, Vs-0v,Va-0v and 5v-5v

    jump 470 resistors from standby to rl-on, m5-on and vs-on PS shutsdowns

    Feel the problem is in the Vs &Va Section of PS But Any direction to solve this problem welcome

    Patrick
    Tags: None
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