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Pv900 power amp 300 watts

Had power serge from wall socket,melted wall socket. when i turned my amp back on it came on,but volume very low and muffled. i tried to reset circut breaker on back of amp,won,t reset. plays fair if yousins headphones,but not if you try to youse speakers only. there are set buttions in the rear you use a pencil ,to push inset buttons ,for bridge,or sterio if you hold the button halfway the speakers sound great,let it go and the amp,goes back to the same low muffled sound. did i blowout my amp'or what?

Posted by RJONES271 on

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Anonymous

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Recheck your switches on the back sounds to me like you have the subwoofer crossover setting turned on.

Posted on May 02, 2008

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Why does my lowrey organ not make a sound after I have switched it on?


This is a generic answer for this kind of question.
When there is no sound
Check the obvious.
Is there a light on the organ indicating it is on?
  • Plug it in to a known working wall socket, switch on at the wall
  • Switch on at the organ, check light
  • Very old keyboards need a voice to be selected!!
  • Turn master volume up
  • Turn any other volumes up
  • i.e. lower manual volume
  • upper manual volume
  • swell pedals down
Sometimes a sustain pedal plugged into a volume pedal socket will mute the output, check this.
Headphones out, most headphones will turn speakers off, sometimes the headphone switch can be dodgy, work the headphone plug in an out a few times
There maybe a switch that turns off the speakers, look near the output sockets
Software volumes up, check display, if any.
MIDI instruments, check local control is ON
Still no sound?
Can you hear anything from the speakers?
Hiss or hum usually means the speaker is ok
Total silence may indicate speaker failure, but only if there is one speaker, as in older home organs, or smaller keyboards
Try headphones next, TURN Down master volume first just in case!
If there is some sound, very quiet and gross distortion then possible power amplifier failure.
If your instrument has any kind of line out as well as a headphone jack, try these.
The line output will likely be a pair of phono sockets,like you have on HiFi equipment, 1/4 inch, 6.35mm jacks, like the bigger headphone connector, a 3.5mm socket like the smaller headphone connector, or even a DIN connector on older equipment.
Connect these to the aux (or Line or CD) input on your HiFi, guitar amp or similar. (some times these outputs will drive headphones, usually you will only hear anything in the left side). If this works then it is very likely the power amplifier.
Further tests on MIDI equipped keyboards would be to see if the MIDI does anything.
If MIDI out works and there is no sound, and MIDI in makes a sound this points to local being off, buried somewhere in the menu will be local on or off, make sure it is on.
If MIDI out doesn't work then the failure is likely to be internal power supply or something else critical (not nnecessarily major).
Power amplifier failures in newer, low power, keyboards are often the power amplifier chips (i.c,s), older amplifiers may have just blown their fuses but one or more output transistors may have failed.
Cost of repair will be down to the time it takes to get to the fault, taking these to bits and putting them back can take a lot longer than the repair.!
Hope this helps, Chris the Fader

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1 Answer

Audio seems weak...how to increase volume


this is gotta be the largest complaint I hear from folks when they get a new flat screen , its not loud enough or the sound sounds muffled

flat screens are flat ! so theres no good way for mfg to put the speakers facing forward so sound has to hit the wall behind it first then gets directed forward to you ! (low/muffled)

sound bars help with this , but for true rich sound , id go with a video receiver amp combo , some of these even have built in dvd players , and arrange its speakers in a forward facing direction

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1 Answer

The volume on technics SL-BD22 turntable will not turn up and stays at one volume


Since the turntable itself doesn't have a volume control the problem is with the amp it is connected to. It should be connected to an amp with a dedicated phono socket. It's no use connecting it to a tape or aux or CD socket. These sockets do not have a built in pre-amp for the magnetic cartridge. If your amp doesn't have a dedicated phono socket then you can buy a Magnetic Cartridge Pre-amp that will plug into a tape socket etc on the amp and have the deck plugged into it. If plugged into a none dedicated socket though you can hear it, the volume will be very low compared to other sources. If you have got it plugged into a dedicated phono socket and the volume is still low, then the internal built pre-amp inside your amp for the deck has failed and will need to be repaired. The pre-amp failure will not effect any other functions of the amp.

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1 Answer

I have a 96 Cavalier and my passenger side low beam does not turn on (high beams OK) & my horn doesn't work either. I've replaced the bulb with no luck. Any suggestions?


The light socket itself could be bad. If you turn on the lights and put a meter on it you can verify there is power at the socket. If not you still have to trouble shoot some more. No power at socket could be wiring that went bad or melted but you will have to remove the socket and test the wires themselves. No power at the wire bare ends you have to go back to the fuse distribution and check that. Low voltage sucks for this very reason. good luck.

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1 Answer

MUFFLED SOUND, STATIC FEEDBACK AT HIGH VOLUMES


Check the sound in the headphones... It may be your power amps are giving out. MAKE SURE the interconnect cables are either XLR or TRS cables (balanced line). Make sure your power amps and the mixer are ALL powered from the same receptacle OR power conditioner module. You cannot power the amps from one end of a building room and the mixer frrom a wall receptacle at the other end. The building ground bounce can not only cause noise, but can destroy sensitive input circuits of the equipment.

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Fender Hot Rod Deluxe has very little sound, stuck and need help! Turn it on and all of tubes light up. Has a horrible muffled sound with volume at 5. Master volume can be put to any level, and it doesn't...


Just because tubes light up does NOT mean they are good or working... While heaters not lit are an indication of failure, teh reverse is not necessarily true.
Time to troubleshoot this... Plug a set of headphones into teh preamp out. See if audio there is clean... it will be low level using headphones and ONLY from one side as the output is mono and your headphones are stereo usually... If audio is clean here and not muffled, then problem is in power amp section else in the early stages of the unit.
Report back the results of this test...

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1 Answer

What is a "COMM 20" error mean? We had a power outtage & now the outside compressor is not turning on thus no "conditioned' air flow. The fan is operating in manual mode. Please advise.


Comunication error.
Power outage may have also caused a spike.Check your owners manual for a reset button or possiblle blown control fuse on the low voltage side of unit.

Try shuting unit completly off by main circut breaker for a couple of minutes then turn back on,may reset.

Is there a reset option on the t stat?If so try it.
Hope this was helpful

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1 Answer

Facing problem-(WAP54G)


Try the following steps:

1. Disconnect the WAP54G power adapter.

2. Reinsert the power adapter directly into the wall socket.

3.Remove any power strips or surge protectors temporarily to ensure that these items are not preventing the WAP54G proper operation.Note: Make sure that you are using the power adapter that came with your WAP54G.

4. Plug the power adapter into a different wall socket in another room.

5. Press and hold the reset button for 1 minute. Release the button. Then turn off the WAP54G for another minute. Then turn it back on.

6. If the power light is still red, then you will need to replace the WAP54G.

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2 Answers

Volumne


Hi santka

It sounds like it has locked up from a power surge. Try a full reset of the unit by powering it down completely unplugging it from the wall socket overnight. If it still misbehaves, get back to me here and we can look into it more.

regards
Graeme

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1 Answer

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If the sub has a volume control, turn it down then turn up the volume on the amp to the very high volume you mentioned. If it still has very low muffled sound, then we know the problem is about the amp.

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