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Prx615m not turn on - JBL Bags PRX615M-CVR Cover Speaker

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Mosfet, FQP27P06/FQP30N60 got fried in the power output stage, this is a common issue with JBL powered by Crown speakers, let me know more to help a bit more also.

Posted on Nov 07, 2013


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Posted on Jan 02, 2017


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When they are placed on speaker stands, they lean to one side since all the weight from the components are on one side. Is there a simple way to fix the leaning issue?

Remove one of your shoes. This will cause you to lean slightly and therefore not notice the slanting speakers. It will also improve the quality of your recordings, with deeper bass and a clearer soundstage due to quantum grounding effects.

Dec 29, 2015 | JBL PRX615M 15 Inch Two Way Self Powered...

1 Answer

Psr s 910 keyboard. Why does it turn on for 5 minutes, then turn off?

Be sure to use the original adapter and still in good condition/normal.
Have you tried, at the time after 5 minutes then turn off, and then you restart immediately, the unit is turn ON again? Or is there a time lag to ON, after power-switch is pressed?
Errors like this one,may be due to defective adapters (works only for a moment, after being hot, stop sending voltage), and can also be caused by damage to the regulator section in PSR910.
To check this, it must open/disassemble the PSR910.
"Do not do this if you are not experienced in electronic repair.
Leave it to the experts."

At Yamaha PSR S950 keyboard, there is a setting "AUTO POWER-OFF" in the UTILITY menu.
This setting function is To prevent unnecessary power consumption. It will Automatically turns the power off if the instrument is not operated for a specified period of time. The amount of time that elapses before the power is automatically turned off can be set (default setting: 30 min.). The setting is retained even if the power is turned off.
At the PSR-S910, this function does not exist.

25916731-0iboo3zhsd2tihqbcqrvolhc-1-1.jpg .

Oct 20, 2015 | Music

1 Answer

How can I turn off the sound to the foot pedals of my Lowery organ. Is there any setting on the organ to do that?

If you turn off any voice tabs for the pedals, they are effectivly turned off.

Mar 22, 2015 | Music

1 Answer

Is it normal for a thump when turning on active mackie speakers

Yes, it's normal. You can probably turn the speaker volume down to minimum before turning them on to minimize it.

Jan 31, 2015 | Mackie Music

1 Answer

What is the correct reset for Yamaha P 85 Digital Piano?

Reset Instructions:
1) Try a partial reset by holding down the last white key while turning the unit ON.
2) If you haven't recorded any performance(s), for a full reset, hold down on the last white key AND THE lst three black keys while turning the unit ON.

Jan 03, 2014 | Yamaha P85 88Key Portable Digital Piano

1 Answer

My jbl prx615m sounds like it has something vibrating inside the cabinet.

Pay attention to the source of rattling, if its just the enclosure or comes out from the speaker and let me know to improve helping you out...

Aug 27, 2013 | JBL PRX615M 15 Inch Two Way Self Powered...

2 Answers

Marshall mg100fx treble knob does not automatically kicks in when amp turned on?

Are you old enough to remember when amps were all linear? Well, this is a computer. I haven't seen the schematic, but I'd guess the knobs are not connected to pots, but rotary encoders which send signals to a processor board to change settings. So, it's either a bug or a "feature" that causes these settings to start at zero when you boot the machine. You may be able to store all the last settings in memory so they start there.

Apr 05, 2017 | Music

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Powerpod 820 will not turn on. When connected to power, the lights flick on when the switch is on but immediately turn off. I cannot get the powerpod to power up. I have switched outlets, cords, and even...

There is a "Main L/R" button which most people have pressed to enable
the main speakers. Turn off the button. Then turn the unit on.

Then turn on the button again. Solved this issue for me.

Oct 13, 2011 | Music

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Hey . uhm just wondering does anybody have the problem where when you turn your amp on nothing happens .. everythings gone ..but when i turn it off i can hear it turn off .. it clicks when i turn it off ...

Wonder no more, there are many others with many different brand of amps that do this. Obviously it needs repair unlless you have a problem with the cable or source you are using or have forgot to turn up the gain controls which I am sure you have checked. There are so many possibilities that there is no way we can say open it and replace this... If you get a small pop in the speaker when you turn it off, then the power portion of the amp is probably OK. A common probllem on amps that have a preamp out or power amp input jacks is a failure of the switch contacts on the crummy jacks that pass the audio through from teh preamp to the power amp...

Jan 03, 2011 | Line 6 Spider Iii 15 Modeling Guitar...

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Amp doesn't do anything.

If you hear a pop when you turn it on and the squeak when turning off most of your amp is probably working.Depending on whether it is a tube or solid state amp there are several things to consider some being as simple as a deadLED or bulb in the pilot light and a defective input jack to as complicated as a dead power supply to the preamp circuitry. If you are not familiar with safety procedures and electronic trouble shooting and have no test equipment and the schematic you might be better off having it serviced. Here is a link to a troubleshooting guide: A lot of the info can be applied to solid state amps. Hope this helps.

Jan 19, 2010 | Music

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