Question about Numark Industries Numark CDN 22 Mk4 Double DJ CD Player

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Numark CDN225 System is about 18mnths old and I use it 4 times a week. Left side(facing deck) CD will not read CD,s I put CD in and I just get a message that says rEAd. When I open the CD drawer the disc is spinning. Also the other side I have noticed occasional speed fluctuation. My CD,s are clean and have no contamination and only original CD,s www.dancewithstuart.co.uk

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6ya6ya
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Posted on Jan 02, 2017

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jdvillanueva
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SOURCE: Hi, I purchased the Numark Twin

Hi kshanley,
If you have necessary tools and test instruments, know safety precaution in basic troubleshooting try the steps below to solve your problem.
Assuming that the disc is good.
1.Clean the lens. - Sometimes because of dust and any fine foreign objects the lens can't read any disc. If you have a CD Lens cleaner, play it to the affected area. If this is not available you may manually clean the optical lens. Open the cover and gently clean the eye of the lens by smooth,clean,soft cotton buds. Be careful while doing this, just a gentle stroke only.
2.Check the ribbon - Check the ribbon connected to the lens from the main board for scratch, damage. Once it has an open line then of course the lens can't read the disc. Also try to erase the contact by pencil eraser. If you've done the steps above and the symptoms still there then the next step requires you a little knowledge in soldering technique and reading the ohmmeter.
3.Check the motor - Check the motor that spin the disc with an ohmmeter. You can test it using the ohmmeter (x1) even it is connected on the lens assembly.Good motor - reading should be fairly high and it will spin. Bad motor- reading will drop to low resistance and will not spin.

Click this link for more info.



LINK1

LINK2


Hint : Most of my repaired unit the above parts are commonly caused of the problem.
If you confirmed that you have a defective motor then replace it with a new one. Before replacing the new motor you have to check the clearance of the disc holder with the old one. The clearance should be the same as the old because if not the lens will not read the disc if it is too far or too close.
If the above steps didn't cure the problem, high chance that your optical lens was faulty.

If you can't do the job yourself, I would advice you to look for a professional to troubleshoot the symptom.

Also, check if your unit is under warranty period, avail it because the manufacturer will fix it for free. Don't attempt to open the cover(it will void the warranty).



Hope I helped you.
Have a nice day!
Thanks for using Fixya.

Posted on May 03, 2011

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djromann
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SOURCE: my numark cd mix2

Hallo! This is caused by the laser fault. First unplug the cord, high voltage!!! Disassemble the device, look under the cd place you will see a little lense. Clean it VERY DELICATE with a piece of cottonwool with alcohol, can clean it twice with alcohol and then with a dry one. If doesn't help, then need to replace the laser reader system with a new one, it's that where the lense is placed, it must have on it an badge with the serial number, you can search it by that number/code.

Posted on May 18, 2011

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Currently, i don't think there are that many websites that explain how to use the Cd decks, however i can provide you with some basic information. Most of the information here could be worked out by trial & error.
- Pitch control on the right of each cd deck can be slid up ( slows it down %) and slid down (speeding the track up %) i think the pitch control has a range of either +-10% or +-16%.

- Cue button, has the potential for Cue'ing or setting up the cd to instantly jump to the "cue'd" point with the press of this CUE button. This is done by either pressing play/pause button and rotating the jog wheel to a point of time in the track which automatically sets the cue point OR holding down the >> or << search button to find a spot within the track at a greater speed.

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- Low, Mid, High. These nobs on the middle section of the deck change the individual track by which it is corresponds. (Left side = left cd track, and vica versa) Low refers to the Bass of a track which can be essential for mixing two tracks and elminating excess bass noise. Mid refers to the drumming and even synth of a track, and changing this can result in some cool sounding effects. High refers to the 'high' frequencies of the track playing, such as snares, hi hats and possibly vocals. All these controls are crucial to understand in order to mix 2 songs together successfully. It's good to get a chance to muck around with these cointrols. The middle of each control resets the setting to normal or default.

- Channel fader. the two controls that slide up & down on both sides of the mixer on the deck. This is also referred to the volume setting. Useful for mixing seamlessly one track into another.

- Gain. This control at the top of the mixer refers to the volume level or 'gain' of the cd track that it corresponds to.

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- Cd/usb/sd, changes the mode of system reading. from CD to USB or SD card.

I really hope this general guide to using the Audioline ProDJ MDex3 has helped!
Peace. Marc.

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