Panasonic rx d 27 e service manual

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1 1. Before Repair and Adjustment Disconnect AC power, discharge Power Supply Capacitors C116, C216, C317 through a 10 , 5 W resistor to ground. DO NOT SHORT-CIRCUIT DIRECTLY (with a screw driver blade, for instance), as this may destroy solid state devices. After repairs are completed, restore power gradually using a variac, to avoid over current. Current consumption at AC 230 V, 240 V, 50 Hz in NO SIGNAL mode should be ~45 mA respectively. 2. Protection Circuitry The protection circuitry may have operated if either of the following conditions are noticed: - No sound is heard when the power is turned on. - Stops during a performance. The function of this circuitry is to prevent circuitry damage if, for example, the positive 3