NAD-L75-avr-mod70103 电路图 维修手册.pdf

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1、PAGE 7-01-03 NAD L75 MODIFICATION PROBLEM: When the headphones are plugged in the subwoofer is not muting. CAUSE: Mute line on subwoofer does not activate when the headphones are plugged in. SOLUTION: The headphones, On line(h/p on) from the control (front panel) board can be connected via a wire an

2、d a 4.7k ohm resistor to the base of Q302 on the surround pc board. See diagram 1 ,2 and 3. Glue resistor to surround pc board after to prevent wire and resistor from moving. Diagram 1 L75 FRONT PANEL PC BOARD (PARTIAL REAR VIEW)L75 SURROUND PC BOARD (PARTIAL REAR VIEW) GROUND PLANE PINS 13&14 CN83 PIN 12 Q302 ADD RESISTOR 4.7K OHM TO BASE OF Q302 ADD WIRE AS SHOWN RadioFans.CN 收音机爱 好者资料库