Denon AVR-4810CI Service Manual
Also see for AVR-4810: Owner's manual
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69AVR-4810CI/AVR-48104. Power AMPNo sound is outputThe protector operates.YESIs the power transistor open or short circuit? YES Replace the power transistor.NOIs the emitter resistance of the powertransistor open?YES Replace the emitter resistance.NOIs the base resistance of the powertransistor open?YES Replace the base resistance.NOIs trimmer potentiometer between the baseof the power transistor open?YES Replace the trimmer potentiometers.NOIs the zener diode and diode which areconnected with the base of a powertransistor short-circuited?YES Replace the Zener diode and thediode.NOIs other transistor trouble? YES Replace the transistor.NOIs other resistance trouble? YES Replace the resistance.NOTurn on power, check that voltage of the section is normal and that idling electric current isflowing. |
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