Question about Pioneer DJm 400 Professional DJ Mixer

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How to fix a djm mixer 400

I was messing around with the buttons and now I can't hear clearly out of my headphones when I plug my headphones in. It makes this crackling, fuzzy noise. I've tried turning it on and off. Moving the buttons around to see if I accidentally pressed a button but I've done all that and it's still the same. I'm using the serato dj program too. Would it because the setup on the program?

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Posted on Jan 02, 2017

  • 2 Answers

SOURCE: Pioneer DJM-400 mixer turns on, but channels aren't working

could be a few things , what have you tried to trouble shoot the problem ?
My steps would be ;
check all leads (even if you KNOW u pluged them in)
check the gain is set corectly .
check the line phono slectors are set to what ever you have you leads pluged into on the back of the mixer ( there is 4 red and white RCA plugs , 2 for phono,2 for line CDJs shold be using line )
if you are using digital cables to conect your CDJs , on the back on the mixer there is a small switch marked "CD or digital" make sure that is sleceted "digital " . if ur not using digital cables make sure it is on "CD" .
the info iv put here is based on the DJM-800 so your mixer my not have some of these featers as iv never used a 400 . hope this helps dued . check out www.djtutor.com for more tricks and tips . Pratices'N'enjoy !

Posted on Jan 03, 2009

  • 3 Answers

SOURCE: One Output low on DJM 400

This may not be the correct solution, but have you checked the switches on the back of the DJM-400 to see if one output is set to "PHONO" mode?

Posted on May 16, 2009

  • 9 Answers

SOURCE: how to connect my qqualizer to my djm pioneer 400 mixer

Use the stereo master outs from the DJM into the A and B Inputs of the EQ (you'll need 2 phono to Jack or 2 phono to XLR cables) then from the A and B Outputs of the EQ to the power amp/ speakers, etc (you'll need jack or XLR cables depending on what is powereing your speakers)

Posted on May 28, 2009

  • 4234 Answers

SOURCE: My DJM 400 power button does not stay on, when I

The only "fix" for this is to replace the power switch. The internal latch has broken. I have seen this a few times. You can get the part from Pioneer directly. Contact them and request the power switch for your specific model. They may also request the serial number as there were a few variants of this model.

Dan

Posted on Jun 15, 2010

Testimonial: "Thanks Dan, I appreciate your help. "

  • 334 Answers

SOURCE: I have a djm 400

Does it buzz through cans? (headphones). Try listening on headphones (turn off any amps and speakers) on cue to each channel you use and to the master output. is it stil there? if so it's an all round earthing fault. If it's all good through the cans (sorry...I mean headphones), try it with the amp/s on again. If the buzz is back it souds like the screen on the main audio output connecters has come off inside.
It's a quick fix, but if you have never used a solder iron, take to someone who has.

Posted on Jan 07, 2011

Testimonial: "Great start need a little more help"

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2 Answers

I have a djm 400 and it has started producing a buzzing sound through the speakers. I can take the same speaker cables from the djm 400 and hook them up to my backup mixer and the buzzing goes away. What...


Since it works with your other mixer, the DJM400 is probably fine. You have a ground loop.

Make sure ALL, and I do mean ALL... (re-read that if there is any confusion) interconnected equipment WILL BE powered from the same receptacle or source. If speakers or amps are powered from one place and the DJM is from the other end of the room you likely have a ground loop and you can ex[ect buzzing. Run extension cords alongside the audio leads if necessaryy to carry power from where the amps or speakers are plugged in back to the DJM400 and ANY pther connected equipment.

Jan 07, 2011 | Pioneer DJm 400 Professional DJ Mixer

1 Answer

I have a djm 400 and it has started producing a buzzing sound through the speakers. I can take the same speaker cables from the djm 400 and hook them up to my backup mixer and the buzzing goes away. What...


Does it buzz through cans? (headphones). Try listening on headphones (turn off any amps and speakers) on cue to each channel you use and to the master output. is it stil there? if so it's an all round earthing fault. If it's all good through the cans (sorry...I mean headphones), try it with the amp/s on again. If the buzz is back it souds like the screen on the main audio output connecters has come off inside.
It's a quick fix, but if you have never used a solder iron, take to someone who has.

Jan 07, 2011 | Pioneer DJm 400 Professional DJ Mixer

1 Answer

Hi, I have a DJM 400 Pioneer mixer, I'm having trouble with the output levels. It seems the left output is only putting out about half the sound of the right output.I have used different RCA cables,...


Please try a set of headphones. If it is balanced in the phones, then I suspect trouble might be in the muting circuits of the main output.

Next test is to verify the outputs using direct inputs to the CD input...

Dec 01, 2010 | Pioneer DJm 400 Professional DJ Mixer

1 Answer

My DJM 400 one of the outputs is louder and has distorted sound what do I do?


First verify that one channel is bad by swapping the output leads and seeing the bad audio comes from the other speaker. Assuming it does, you probably have a bad output driver on one side.
This can happen if one powers part of the system from different receptacles in a venue and electrical disturbances destroy one or more audio interconnects. ALWAYS power ALL interconnected equipment from the same source, even if you have to run an extension cord between power amps and the mixer.
You will probably need to take the unit for repair. The parts cost should be nominal, however labor could cost a bit.
Find out is SAME distortion is present in the headphone output. The circuitry shows a bunch of muting transistors and one of them could be bad... but we can do some troubleshooting externally with testing at headphone jack, etc.

Oct 14, 2010 | Pioneer DJm 400 Professional DJ Mixer

1 Answer

My DJM 400 power button does not stay on, when I hold in the power button it does have power, but does not switch to stay on. Any quick fixes for this? Thank you.


The only "fix" for this is to replace the power switch. The internal latch has broken. I have seen this a few times. You can get the part from Pioneer directly. Contact them and request the power switch for your specific model. They may also request the serial number as there were a few variants of this model.

Dan

Jun 14, 2010 | Pioneer DJm 400 Professional DJ Mixer

2 Answers

How to connect my qqualizer to my djm pioneer 400 mixer


Use the stereo master outs from the DJM into the A and B Inputs of the EQ (you'll need 2 phono to Jack or 2 phono to XLR cables) then from the A and B Outputs of the EQ to the power amp/ speakers, etc (you'll need jack or XLR cables depending on what is powereing your speakers)

May 27, 2009 | Pioneer DJm 400 Professional DJ Mixer

1 Answer

One Output low on DJM 400


This may not be the correct solution, but have you checked the switches on the back of the DJM-400 to see if one output is set to "PHONO" mode?

Apr 17, 2009 | Pioneer DJm 400 Professional DJ Mixer

1 Answer

Pioneer DJM-400 mixer turns on, but channels aren't working


could be a few things , what have you tried to trouble shoot the problem ?
My steps would be ;
check all leads (even if you KNOW u pluged them in)
check the gain is set corectly .
check the line phono slectors are set to what ever you have you leads pluged into on the back of the mixer ( there is 4 red and white RCA plugs , 2 for phono,2 for line CDJs shold be using line )
if you are using digital cables to conect your CDJs , on the back on the mixer there is a small switch marked "CD or digital" make sure that is sleceted "digital " . if ur not using digital cables make sure it is on "CD" .
the info iv put here is based on the DJM-800 so your mixer my not have some of these featers as iv never used a 400 . hope this helps dued . check out www.djtutor.com for more tricks and tips . Pratices'N'enjoy !

Dec 28, 2008 | Pioneer DJm 400 Professional DJ Mixer

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