20 Most Recent TDK MP100 Professional Headphones Questions & Answers

Take a look at my tip on headphones, just click my user name to find it.

Each of the rubber covered cords running to each ear piece has two fine strand wire bundles inside. The right ear piece has a red colored strand and a copper colored strand. The left ear piece has a green colored strand and a copper colored strand. The wires are coated with an insulation lacquer. The lacquer burns off when you heat the wire for soldering.

Repair item: 3.5 mm stereo headphone jack, shrink tubing

Plan for strain relief:. These headphone wires can't take any tension at all. You need to crimp the black cords to the headphone jack somehow.

Slide strain relief and headphone jack housing over the over the rubber covered headphone cord.

• You need to plan a way to relieve the pulling stress on the solder joints where the two headphone cords enter your replacement headphone jack.
• Try shrink tubing if you have it.
• If you have some thermal shrink tubing, slide a piece over the headphone cord end before stripping the wires.
• Slide the headphone jack casing over the headphone cord also.

Strip each headphone cord 5/8" using the 18 gage setting of your wire stripper..

Hold each headphone cord in a "third hand" soldering assist tool and tease the green, red and copper bundles apart..I wore a 10x Magnavisor and I used a sewing needle and a bright light.

Twist the copper colored strands from both headphone cords together. They are the common ground wires. The copper colored bundle will attach to the headphone jack ground.

Apply a dab of solder to the end of each of the three bundles of wire. You will see and smell the insulating lacquer as it burns off. Keep most of the wire bundle cool.

Position the two strand headphone cord and the 3.5 mm headphone jack in the third hand soldering stand.

• Plan where you can crimp the headphone cord. Crimp it when ready.
• The green == left channel wire goes to the tip of the 3.5mm jack.
• The red==right channel wire goes to the middle of the 3.5 mm jack
• The copper colored wires go to the ground of the jack..
• Measure resistance, 31 ohms per earpiece.
• Screw the jack cover on and finish the strain relief craftsmanship.
  

If your TDK NX-4CD has no volume and the CD door does not open, here are a few steps you can try to troubleshoot and potentially resolve the issue:

1. Check the mute function: Make sure the unit is not set to mute. Look for a dedicated mute button on the unit or on the remote control and ensure it is not activated. If there is no dedicated mute button, check the volume controls and settings to ensure they are not turned all the way down or set to minimum levels.
2. Reset the system: Perform a system reset by disconnecting the power source from the TDK NX-4CD. Unplug the power cord from the electrical outlet and leave it unplugged for at least 10-15 minutes. This will allow the unit to fully power down and reset. After the waiting period, plug the power cord back in and test if the volume issue is resolved.
3. Check the speaker connections: Ensure that the speaker wires are securely connected to the appropriate terminals on the back of the unit. Sometimes loose or disconnected speaker wires can result in no sound. Additionally, check for any visible damage to the speaker wires and repair or replace them if necessary.
4. Clean the CD player mechanism: If the CD door does not open when pressing the Open button, it could be due to a mechanical issue. Gently clean the CD player mechanism using compressed air or a soft cloth to remove any dust or debris that may be obstructing the door's movement. Be careful not to force the door open to avoid causing further damage.
5. Seek professional repair: If the above steps do not resolve the issue, it may indicate a more significant problem with the internal components of the TDK NX-4CD. In such cases, it is advisable to contact a professional audio equipment repair service or contact TDK customer support for further assistance. They will have the expertise and specialized tools to diagnose and repair the specific issues with your unit.

It's important to note that attempting any repairs or disassembling the unit yourself may void any existing warranty and could potentially cause further damage. Therefore, if you are not comfortable with electronics repair, it is best to seek professional assistance.

MMMmm, bummer. The earphone CABLES look rather small and vulnerable? IF you move the CABLE NEAR the connecter do you hear any sound? How about up at the earphones themselves? If you wiggle the cable are there any sounds? There HAS to be a 'open circuit' somewhere? Maybe the volume was set too high and the LEFT earphone happened to blow out? And perhaps it's time to treat yourself to a NEW headset with a MUCH better and substantial connecting cable? Anthony

I am very interested in this issue

Hold down the A33 and AUX button together for 5 seconds. The A33 should flash the volume LEDs and then reset and turn off. Let the speakers remain off for 10 seconds before turning it back on. The unit powers on in the AUX mode and you should be able to press Bluetooth and pair the unit with your device.

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Google it.