I read in the user manual that this usually means that the amp protection circuit has been activated. It goes on to say that I should bring the unit to a dealer. Is there any way to reset this circuit without sending into the service center?
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If the protect function works but is causing you problems, cancelling the protection function should help, and it will be possible to enter the self-diagnostic function mode. This should disable all functions of the protection mode, excluding the 'excess electrical current detection' feature.
While pressing the "Tone Control" and "Info" keys, try pressing the power key to turn on the power. Keep pressing those 2 keys for 3 seconds longer.
this should activate the Self Diagnostic function, with your Protection Mode disabled.
in this mode the 'sleep' section on the tv's fluorescent display flashes to indicate that the mode is properly activated.
just be very aware, this function is normally there as a safety feature and i cant guarantee that disabling it altogether won't cause other problems down the road. best of luck!
try pressing and holding 'advanced surround' and the power button. This should reset the protect circuit. If it turns off again right away, then there is a problem with the amp that needs to be repaired.
I don't know about the newer receivers but this sounds like an arching OFF/ON power switch that was a problem on Pioneer receivers years ago. I would bypass the switch and see what happens.
1. Unplug unit from wall. 2. Jumper two wires going to off/on switch using alligator clip with insulated boots on clips. 3. Plug amplifier into disconnected circuit breaker/fuse protected AC strip. 4. Plug AC strip into wall outlet, turn AC strip switch ON and see if problem disappears.
If there is no apparent cause for the protection mode activating (such as shorted speakers, burning smell, blown fuses, lighting strike or mains power surges), reset the protection as follows and see what happens.
Connect power cord to mains and wait 5 seconds or so. While holding down "info" and "tone control" buttons, press "main zone" power button briefly and release, but keep "info" and "tone control" buttons pressed for at least 3 more seconds. The unit should power up. Assuming the reason for the protection has passed or been fixed, the unit can now be turned off and then back on with the "main zone" power button to restore normal operation mode. If the protector activates again, the fault is still present and the unit needs to be repaired, ideally by a Yamaha authorised repairer. There are dangerous voltages present in high power amps and a lot of grunt in terms of stored energy - best left to trained technicians.
I can tell you what you will have to do , if you can unsolder and solder components then i can help you fix the problem. but if you cannot do some electronic tests or procedures then it is going to be hard for you and me to get this problem fixed
but if you can then please give a fixya rating so that i can further assist you, any other rating than fixya hurts our score , so for me to continue to help you will have to give this rating , sorry but this is fixyas doing , you can always change it if you are dissatified with my help , thanks
Hello, is this a Radio Shack PA amp or Jamo amp? The unit is probably in "Protect" mode. Is this a PA system or a receiver...receivers have a protection circuit that will not let the speaker relay activate if the amplifier output section is shorted and sending voltage towards the speakers...so they won't fry!!The speaker relay should activate within 3 to 5 seconds if your output section is ok.