Circuit Diagram !new! Full: Chkv904g

CHKV904G

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Continuity Testing

: Use a multimeter to check the copper traces (lines on the diagram) for breaks. CHKV904G The search results for do not return

4.1 Official Service Manuals

• Secondary Side: TL431 (shunt regulator) + Optocoupler (PC817).
• Action: Output voltage rises -> TL431 conducts -> Optocoupler LED lights.
• Primary Side: The optocoupler transistor connects to the COMP/FB pin (Pin 6) of the CHKV904G.
• Result: The IC modulates the PWM duty cycle to keep the output stable.