Denon AVRX5200W/6200W SMPS

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  • ponteley
    New Member
    • May 2020
    • 4
    • USA
    #1

    Denon AVRX5200W/6200W SMPS

    Hi everyone!

    Troubleshooting SMPS with output voltage fluctuation from 4.8V to 5.0V, spikes to 5.2V and back to 4.8 every 2-3 seconds.

    Replaced with brand new: both optocouplers U6501/02, rectifier D6515, U6503 IC.
    Primary voltage is stable 160V on C6506.
    T6501 secondary winding output AC voltage is stable
    Diodes tested OK. Caps OK. Resistors OK.
    Suspect D6524, but not sure....

    Any help is greatly appreciated!
    Attached Files
    Last edited by ponteley; 08-04-2021, 08:27 AM.
    Tags: None
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