Re: Getting a "Protect" message in the display which then...
The speaker wires were al little frayed, so I cut and stripped new 3/8" leads and when re-inserted the receiver worked fine. The problem was a short from the frayed wires touching either the back of the receiver or some other metal near the terminal.
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Take the cover off and look at the cable that connects the tuner to the main board. Make sure it is connected straight and tight. Make sure all screws in the back are tight, just in case it is a grounding issue. Iff all checks out and you still have issues, replace your tuner.
Since you have 2 receivers, you can either use the Sony STR-AV570X or the TA-AX380. You will need 3 Stereo RCA Cables to connect your CD Player, Tuner, and Tape Player. The speakers connect to the receiver you choose using the speaker input terminals.
Here is the diagram (click on picture to enlarge):
Are you getting on the display, possibly a "P" or "Protect" that indicates it is in the protect mode?
Hitting the top of the receiver indicates a possible intermittent component or board connection. The receiver will shut down when the Microprocessor receives various fault conditions, including shorted speaker and wires, but if it develops an internal fault it will also shut down to protect itself and the speakers.
Remove all speaker wires and inspect th terminals for any stray wires shorting the terminals.
If it still shuts down, then a professional servicer would be required.
Thanks for using Fixya, and if I can help you further, please let me know.
I used the live chat and the problem was resolved. Usually the problem are strands of speaker wires which cause shorting and protection shuts off the receiver in order to prevent damage. There was one speaker that I repositioned recently which was causing shorting. I twisted the wires and tightened them in place and my receiver has been working w/o a glitch. I was lucky that I did not have to check all the wire strands on the receiver and all the speakers. Problem solved and I learned valuable lesson.
Here you can get the owners manual for the unit if you need it;
For the protect mode to kick in only for some input sources, then there would have to be a fault in one or more of the pre-amp circuits - there will be a separate one for the radio tuner.
Probably the solution for such a good unit is to contact the manufacturers and see what they have to say - probably they will suggest you send it in for service and i suspect they would be right - here are the contact details if you happen to be in the US;
or through this link if not;
Hope this helps and you get an answer from them - it is probably fixable relatively easily and shouldn't be expensive for parts :)