Question about Pioneer A509R Amplifier
It is possible that your amplifier is cutting off the power due to a protection in the system. The output or power circuit could have a fault that trips off the protection circuit to worrk. now this is ttricky and might need a lot of power board electronics experience as the fault needs to be traced . You can disconnect the poweer drivers and see if the poweer come on. If so the drivers must be chacked for short and replaced. Check also the speakers for any short and disconnect and check. hope you try. Good day
Posted on Jul 30, 2010
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Posted on Jan 02, 2017
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Resetting the main unit
Use this procedure to reset all the receiver's settings to the factory default. Use the front
panel controls to do this.
1 Switch the receiver into standby.
2 While holding down the TONE button, press and hold the STANDBY/ON button for about three seconds.
3 When you see RESET? appear in the display, press ENTER .
OK? shows in the display.
4 Press SYSTEM SETUP to confirm.
OK appears in the display to indicate that the receiver has been reset to the factory default
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