Question about NAD C320 2-Channel Amplifier

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Won't stay on even in standby

My nad C320 clicks off within seconds of switch on.Standby red light goes out.Power supply seems fine 39V on base and emitter of each of the 4 large heat sinked transistors.No voltage at collectors.Transistors read ok on meter.
Ken H

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  • stomasevic Nov 14, 2008

    the red lights comes on a few seconds after the green light is on, with the brief click sound. i do not have the circuit schematic and i am in saudi arabia where electronic repair shops are hard to find. can you tell me exactly the numbers and/or positions of transistors and resistors that i should check and replace? thanks!

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The voltages are wrong. You should see (0.0, +/-0.6, and B+/B-) on the 3 pins. The driver section has a problem. Check the driver stage for shorted transistors or open resistors.
Dan

Posted on May 19, 2008

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