2 Before Repair and Adjustment
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Disconnect AC power, discharge Power Supply Capacitors C506, C507, C508, C576, C577 through a 10 Ω, 5 W resistor to ground.
DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid state devices.
After repairs are completed, restore power gradually using a variac, to avoid overcurrent.
Current consumption at AC 110V, 127V, 220V, 240V, 60Hz, 60Hz, 50Hz, 50Hz in NO SIGNAL mode should be ~400mA, ~400mA, ~250mA, ~250mA respectively.