Home Theater Questions? Ask a Technician for Answers ASAP
Hello and sorry you're having problems. There is not a pushbutton fix for this problem, as an amplifier stopping producing sound is a hardware related problem- either there's a component experiencing thermal runaway )it gets hot, causing other parts next to it to get hot, which then increases it's own temperature even more, and so on), or since this is an older unit- the power supply filter caps have drifted out of spec enough to prevent the unit from functioning at all, or in the worst case scenario, the power supply transformer has failed. In order to know what's caused this, you would need to be able to measure live voltages first at the secondary of the transformer in AC, and then after the bridge rectifier in DC and then follow these voltages to see where they're missing. That being said, most people are not up for this type of repair- as unless you're experienced with it, repairing a receiver is not a good first project. Please let me know what you've tried, what experience you have and exactly what the receiver is doing right now and we can proceed.
Alternatively, if you're looking to have this repaired at a shop, you're looking at an average $150-$200 repair cost on this model, which is a heavy chunk towards the purchase of a new and more powerful amplifier/receiver.
Additionally, if you have tools (meter, oscilloscope, and soldering station), then the Service Manual would be of help to you in order to find out what voltages should be present at what points:
With certainty, I can say though that the most common failure points on these units, are the power supply filter capacitors (over 10 years old they begin to drift out of spec and require replacement) or the output transistors which drive the speakers directly.
If you can solder, a good place to start would be to replace the 2 large "cans" next to the power supply transformer- by matching up the ratings in "uf" and "DC volts" and then replacing them with units from:
If you need further assistance let me know. Please do not forget to click a POSITIVE RATING before you go- as it's how I am credited for my work. You can follow up at any time, at no additional cost.