Question about Yamaha RX-V730 Receiver
I have a Yamaha RX-V730 receiver and since the day it was purchased it was working fine, but when the volume was raised, the receiver would shut down. Once turned on a CHECK SPEAKERS message was displayed. I replaced all the stock speaker wires with Monster Audio Cable, and the cable changed seemed to have fixed hte error. However, in one incidence the volume was raised and the receiver was shut down and could not power up thereafter. When the power button is pressed a double clicking noise is heard and the receiver will not turn on. I checked the impedence level and it was set at 8 ohms, which is the power output of the speakers. When the impedence level is moved half way from the center to either the left or right side the receiver powers up but then shuts off within 3 seconds. I checked the fuse and the fuse looks good. However, when the power button is pressed the clicking noise can be traced to a relay in the Power Circuit Board. My guess is that it can be the relay or the fuse. Can you please help me find the problem and find a possible solution and avoid a high cost repair? Thank You For Taking Time Read My Post I was given this receiver by a customer of mine. I seem to have the same problem. The fuse appears to be fine I just wasnt able to check for continuity. At the4 moment I have no speakers hooked up to the system, in fact I dont have any thing hooked up at all. I checked the thepower on and all I get is a quick click sound. I watched the fuse and noticed a quick spark and observed the fuse jump slightly in the clips. I'm not certain but the click does appear to come from the relay just behind the fuse on the power board. I even tried placeing foil across the fuse clips to see if the power on results were any diffrent but no luck. Please if any one has a thought let me know.
The clicking may have been coming from the relay itself, but it doesn't simply mean that the relay is faulty. clicking may also be caused by transformers, indicating that some electronic components have developed SHORT CIRCUIT. try measuring resistance of transistors and diodes near the power unit (unplug/turn the unit OFF of course) check also for the impedance of the output power transformers.
check the amplifier IC for short also.
Posted on Feb 29, 2008
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Posted on Jan 02, 2017
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