JVC RX-8010V Shutdown

I am working on a JVC RX-8010V Receiver. The set powers up for about five seconds and then I hear a relay click and it shuts down. I have changed a few electrolytics here and there with high ESR but the problem persists. I am also working at the moment without a schematic. Thought that I would check the Group to see if there may be common problem with this receiver before I try to find a schematic.

Greatly appreciate any help you can provide.

Don and Liz

Reply to
Loading thread data ...

Normally one needs a service manual to troubleshoot a problem like this, and experience with troubleshooting relatively complex audio and power supply circuits is also essential.

Most likely a DC problem of some sort - either a single amp channel has a DC offset, or a regulated power supply stage has malfunctioned, the likely result of which is a DC offset at all amp channels, or simply that the microprocessor-controlled protection circuit has detected the power supply fault.

There is also a chance of a blown amp channel, shorted output transistors, drivers, resistors, etc. The protection circuit would also be triggered by this, though good design practice would suggest a faster shutdown in this situation. Yamaha receivers for example shut down in less than 1/2 second in an over-current scenario.

Mark Z.

Reply to
Mark D. Zacharias

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.