CDJ350 Issues with Audio Outputs

Hi there,

I have just aquired a set of CDJ350s and a DJM350 mixer. I am experiencing a couple of strange things with the audio, and I am hoping I am either missing something or there is a quick fix for this.

The CDJ I have connected to CH-1 plays audio perfectly when either just the L or just the R cable is connected, however as soon as both L and R are connected at the same time, the audio becomes muffled and distorted.

The CDJ I have connected to CH-2 only seems to be outputting audio on the Left channel. Connecting up R does nothing, and when R alone is connected there is no output (level monitor LEDs on mixer show no signal, so not just a speaker issue).

I have tried the usual swapping of connections between CH-1 and CH-2 to rule out the connections on the mixer, so I can only assume the issue is with the players. I'm hoping that the fact both players have issues means that this is a correctable fault, rather than both players are duds.

Any pointers or advice on what to try next? Help much appreciated.

Thanks, Matt.

Matt Seaton June 13, 2014 22:12

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3 comments

Quick update to the above:

I believe I may have found the issue with the CDJ on CH-1. When both L and R are connected, the audio in the headphones is perfect, it is only muffled on the speaker outputs. I think the reason for this, after some research, is that I am running into a single input on my audio interface, which I now realise runs in mono (panned either L or R depending on which of the two inputs I use). I will be switching to two mono cables for L and R today, rather than the single stereo cable I am using at the moment. I am hopeful that this will fix the output issues.

Still no luck with the dead R channel on CDJ CH-2 however. WIll be a real shame if this is simply broken.

Advice would still be appreciated, I'm quite new to all this.

Thanks, Matt.

Matt Seaton June 14, 2014 10:55 0 votes

@Matt >

1) The issue re: muffled audio - what you're experiencing is audio summing, but in this case, it comes out as a cancellation resulting in a muffled sound. Use either a mono signal or properly input two separate mono signals to run as stereo.

2) One way to diagnose the L/R issue on player 2 would be to swap the L/R connections on one end. Is the dead audio still on the R side or is the dead side now the L? Now swap the other end of the cable and check which side is dead. If the first swap ended up with the dead side moving to left, that eliminates the mixer as the problem. If the second swap makes the L side the dead side, the problem is the cable. If neither of those are true and the R side continues to be the dead input, the problem is the player - meaning you should send it for servicing. Contacts are located to the right.

Pulse June 14, 2014 18:03 0 votes

Hi Pulse,

Thanks for the confirmation re: the summing. I will be switching to a proper stereo setup on my interface as soon as I can.

I have been troubleshooting the unit as described above, and it does all point to the R channel being faulty. I have contacted a servicing agent and hope to have this sorted soon. I will let you know if I encounter any further issues so that they can be documented here for others to read.

Thanks for the detailed response, much appreciated.

Matt Seaton June 14, 2014 18:56 0 votes