20 Most Recent Sherwood R-945 Receiver - Page 5 Questions & Answers

It is sensing a short circuit remove the short circuit probably the speakers to be disconnected and the receiver to be powered on if it does not turn off you have localized the short circuit

link to manual

Sounds like DC leakage....pre-drive and/or output transistors (or IC) becoming intermittent often pass DC voltages to the speakers. The "pops" you hear are these DC pulses being passed to the speakers and the "cutout" is the protection circuitry doing its job...protecting the speakers. Speakers want AC voltages...plus voltages moving the cone in one direction, and a negative voltage moving it in the opposite direction. DC voltages push the speaker cones in a single direction and hold it there until it fails. The bad news...it's repair shop time.

There is a short either in the power supply or one of the output channels. Receiver is shutting down to further protect other components. Needs to be serviced. Check if the warranty is still valid since they usually last about one year

bad fuse, something is sending it to sand by to keep from ruining the rest of it, have it looked at by a pro technician

If electronics were that easy, I would nit have had a job for all these years. To do a correct diagnose, I usually have to hook up some extra tools, like a multimeter and / or an oscilloscope A sound generator, to check the amplifier and so on. But in the receivers you can find lots of causes, why a security kicks in. I don't think it will be possible to repair this over some e-mails or messages here. You really need a repair engineer for this. Sorry.

Look in the back of your manual, it depends on where in this world you are located.

Given that the Sherwood is a basic stereo/Dolby Pro Logic receiver, and that we have had sources where digital audio (coax and optical) are the standard for Dolby Digital and DTS for well over 15 years, and that HDMI is established now as the de facto standard for AV connections on many home AV products.... perhaps it's time to retire the Sherwood and look for something new. Entry level price points for new, fully spec'd, AV receivers capable of dealing with HD audio, DD, DTS, Dolby ProLogiic- and ProLogic II have never been cheaper. Sherwood is still a good brand. It has been joined by Yamaha ( RX-V377BL); Sony (STRDH750); Denon (AVR-S500BT) and Pioneer (VSX-524-K) at the entry-level price point of $249. In real terms these are probably a fraction of what you paid for the Sherwood all those years ago. Another option is used equipment. There are some really good pre-HDMI AV receivers from Denon, Yahama and Pioneer available in the used market.