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My Pioneer A 449 stereo amplifier does not switch on. Fuses are okay. Power circuit is okay. I don't have a service manual so can't proceed to check further.

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5 Suggested Answers

  • 102 Answers

SOURCE: VSX-D608 amplifier (Pioneer)

click on link then printer friendly then documents. It should give you the original set of manual.

Posted on Dec 26, 2007

  • 2267 Answers

SOURCE: Fuse locations on Technics SA-DX930

This model It does not appear to have F2 anywhere, I've checked the service manual and could not find it nor is listed in the parts list.

Posted on May 14, 2008

  • 19 Answers

SOURCE: I own an Pioneer CD

On the first board (where the power enters) there is a tall 3 pronged switch, if you turn the board over and solder a piece of wire to the 2 outside prongs, you will find that the Amp works normally apart from that the display reads Cd closed when in Cd mode.

Posted on Jun 22, 2009

caroldon
  • 17129 Answers

SOURCE: My pioneer vsx-519V-k amp won't turn on. Just

Have you checked within the set, the fuse and if the standby circuit is working. thre could be a failure of this sub votage which is required for the switch on of the main power. If you do not have any standby indication you must check this section, however if you arre getting the standby you would have a failed output or a shorting that is triggering the error amp to swtich off. If you are familiar with the circuits you can check but I would suggest that since you will need more experience to look into the main board for tracing the fault. In such case check for the service centre nearest to the place you are in using a google search for Pioneer - Audio systems- sevice. Helpful I hope. Good day.

Posted on Jul 06, 2010

  • 332 Answers

SOURCE: Hello, sorry for my english,

Try searching somewhere like DiploDocs . com website for a service manual. It seems to me you know what you are doing, all you need is a service manual :-)

Best Of Luck

Posted on Sep 03, 2010

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I have a pioneer vsx d503s and the standby light is on. But the receiver will not come on


I sounds like you may have a problem in either one of the Regulator circuits, or, one of the Power Amplifier outputs. If the protect circuit detects DC or Low Impedance on one or more of the speaker lines, it will not fire up the high power section of the power supply. Further troubleshooting will require some working knowledge of power amp and power supply circuits. I've got a .pdf copy of the Service Manual if that will help you.
Please let me know what your level of troubleshooting ability is, and whether the manual will help you.
-Petra

Apr 30, 2015 | Pioneer Audio Players & Recorders

2 Answers

Fuse locations on Technics SA-DX930


Hi,

I have got a service manual for you which will help you out.Please CLICK HERE

Goodluck..

May 14, 2008 | Technics SA-DX930 Receiver

1 Answer

Bought a Pioneer SX580 receiver, everything lights up but can't get any sound


Do you know for sure that it works okay? i.e. did you hear it playing through speakers before you parted with your cash?

Have you checked for buttons that switch the speakers on/off (Speakers A/B A+B) or a manual mute button?

Sep 09, 2014 | Pioneer Vintage Sx-580 Stereo Receiver -...

1 Answer

Pioneer vsx 504s suddenly wont turn on


Fault with power amplifier circuit. Shorted component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/

Aug 16, 2014 | Pioneer Audio Players & Recorders

1 Answer

Pioneer sx-850 goes into protection after several minutes of use. It seems to be after warm up or when room temperature is too high. Summer temps.


Did you check whether the protection assy is working properly? The protection circuit is checking the current of the power transistors as far as I remeber. So there are several possibilities for that fault.
You should grab the service manual or at least schematic (http://elektrotanya.com/pioneer_sx-850_sch.pdf/download.html) and then go step-by-step. I recommend to start up with the protection assy itself. If this works properly go for the power amp. It is also not unlikely that the power supply is the cause of the problem.
Good luck.

Dec 05, 2013 | Pioneer Vintage Sx 850 Stereo Receiver...

1 Answer

Pioneer amplifier vsx-d512 overload message


This indicates the audio output stage in the receiver is loading down and triggering the overload protection circuit to kick in. Check the speaker wires for shorts, if okay! you will need a professional to assess the cost for repair.

Mar 31, 2012 | Pioneer Audio Players & Recorders

1 Answer

Hello, sorry for my english, please. I have an AIWA stereo integrated amplifier, It`s Rx-N5. In this system, the display is dead but the amplifier and the tuner are good. Please, can you help me? I think...


Try searching somewhere like DiploDocs . com website for a service manual. It seems to me you know what you are doing, all you need is a service manual :-)

Best Of Luck

Sep 02, 2010 | Audio Players & Recorders

1 Answer

My pioneer vsx-519V-k amp won't turn on. Just bought it about 4 months ago. we were using it with music and a microphone when it conked out and won't turn on anymore. Have checked the power source, the...


Have you checked within the set, the fuse and if the standby circuit is working. thre could be a failure of this sub votage which is required for the switch on of the main power. If you do not have any standby indication you must check this section, however if you arre getting the standby you would have a failed output or a shorting that is triggering the error amp to swtich off. If you are familiar with the circuits you can check but I would suggest that since you will need more experience to look into the main board for tracing the fault. In such case check for the service centre nearest to the place you are in using a google search for Pioneer - Audio systems- sevice. Helpful I hope. Good day.

Jul 06, 2010 | Pioneer VSX-518-K Receiver

2 Answers

Pioneer Stereo Receiver Display


Fuses do not produce intermittent symptoms.

You've clearly proven a bad conductor is involved. It could be a connector or a broken printed circuit on a flexible component such as a ribbon cable or printed circuit board.

Carefully proceed with power OFF to reseat anything that might lead to the circuit board(s) involved in the display. Try with power on after every step so you'll know which is/is not the fix.

May 18, 2010 | Audio Players & Recorders

2 Answers

Just fried my 2nd home stereo receiver


yeah check the ohms for the receiver an see what the subwoofer ohms are.that can fry them

Oct 04, 2009 | Pioneer VSX-D509S Receiver

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