The switched and unswitched outlets work. The on/off switch is good. The four fuses on the power supply board are good. Haven't noticed any burnt componets. None of the front panel lights are on. No audio. Completely dead.
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Re: No power on a Pioneer A-77X Amplifier
The unit is probably in protect mode. Do you have any electronics repair experience? If so, we may be able to work through this. Let me know and we will try a few things. You will need a multi-meter at a minimum.
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Is it a newone?under warranty period?if not most probable cause is a power supply circuits,you have to check your AC plug/power supply primary FUSE/On Off switch button,if not check your secondary dc fuses on its PSU circuits up to transistor regulators,.
Switch off the amplifier for some time and allow it to reset. disconnect the speakers and reduce the volume level before you put it on. If the power does not come on you will need to probe inside. Get help if you are not familiar but check on the power lines coming in for failure of fuse, the secondary power supply section transformer or the smps power. Hope it would not go further to this but check this out.Check for shorting inthe outputs, if so disconnect and test. Good day
Try these for starters!
Is the power switch broke? Check the power cord! Are any internal fuses blown. Look inside for damage/burnt parts. Are the printed boards broken? after say being dropped? Is the transformer working? Check around the power supply area for faults.
Note - be careful your dealing with mains electric!
Its safe to connect your receiver to amplifier's AC socket / outlet. These units has 2 type of AC sockets, Switched and Unswithced. Switched AC outlet can be On-Off by unit itself.
Feel free to ask any more question.
Its really7 a hard thing to say what the problem could be. It could be the stanby power supply. The power switch the power transformer. with out troubleshooting skills it in your best interest to seek a pro to troubleshoot this for you. You could cause alot more problems by touyching the wrong things if your not carefull. Good Luck