Numark CDX

clintronics · 06-09-2009, 10:19 PM

I'm repairing a CDX that clicks 5 times then spits out the CD. I put a new mech in and nothing has changed. Advise what to do next. After googling this seems to be a fairly common problem. Whats the remedy?

Enzo · 06-10-2009, 01:21 AM

What do you mean by "new mech?" Laser pickup? Tray assembly? The whole transport complete?

Does the CD make it into the play position? Does it turn at all?

In general, a CD player takes in the CD, places it on the spindle over the laser. Then the laser tries to focus. if it finds focus, it spins the disc looking for the TOC. if it reads the TOC, you get a display of some sort.

There are limit switches or sensor switches to let the system know when the tray has homed. If the tray cannot trigger the "closed" switch, then it continues to run the motor until it times out, then it reverses and spits the tray back out. A slipping belt on the tray might cause clicking.

When the CD gets placed over the laser, the focus action is the lens moving up and down. If things are out of whack, the laser can hit the underside of the CD. That would cause a clicking.

If the CD is not clamped firmly in, when it tries to spin, it will chatter and flop around. The edges of the CD can hit the internal structures. That can cause a clicking sound.

I see this one doesn;t use a tray, but still, it must take the CD and place it on the spindle. if something gets in the way, it will try until it times out and then spit it back out. A wire not placed properly for example could get in the way.

You need to expose the CD player and see where in the process it is hanging up.

clintronics · 06-10-2009, 06:09 PM

is new laser, mech assy, the works. CD spins, you hear 5 clicks, time codes never show and it kicks it back out, I've found many post on the goog describing this problem but never a solution.

Enzo · 06-11-2009, 01:27 AM

THat's why I suggested a few scenarios. If we know WHAT it is doing, then we can figure out WHY. If you can eyeball under the disc, you might see the laser hitting it, for example.

IS the transport one large assembly that drops in? Or are the play deck and disc handler separate assemblies that work together - that have the potential to not be in alignment with each other for some reason.

And have you called Numark to ask about this?

06-09-2009, 10:19 PM	#1
clintronics Member Join Date: Aug 2007 Location: Richmond, VA Posts: 67	Numark CDX I'm repairing a CDX that clicks 5 times then spits out the CD. I put a new mech in and nothing has changed. Advise what to do next. After googling this seems to be a fairly common problem. Whats the remedy?

06-10-2009, 01:21 AM	#2
Enzo Senior Member Join Date: May 2006 Location: Lansing, Michigan, USA Posts: 9,266	What do you mean by "new mech?" Laser pickup? Tray assembly? The whole transport complete? Does the CD make it into the play position? Does it turn at all? In general, a CD player takes in the CD, places it on the spindle over the laser. Then the laser tries to focus. if it finds focus, it spins the disc looking for the TOC. if it reads the TOC, you get a display of some sort. There are limit switches or sensor switches to let the system know when the tray has homed. If the tray cannot trigger the "closed" switch, then it continues to run the motor until it times out, then it reverses and spits the tray back out. A slipping belt on the tray might cause clicking. When the CD gets placed over the laser, the focus action is the lens moving up and down. If things are out of whack, the laser can hit the underside of the CD. That would cause a clicking. If the CD is not clamped firmly in, when it tries to spin, it will chatter and flop around. The edges of the CD can hit the internal structures. That can cause a clicking sound. I see this one doesn;t use a tray, but still, it must take the CD and place it on the spindle. if something gets in the way, it will try until it times out and then spit it back out. A wire not placed properly for example could get in the way. You need to expose the CD player and see where in the process it is hanging up. __________________ Education is what you're left with after you have forgotten what you have learned.

06-10-2009, 06:09 PM	#3
clintronics Member Join Date: Aug 2007 Location: Richmond, VA Posts: 67	New Mech is new laser, mech assy, the works. CD spins, you hear 5 clicks, time codes never show and it kicks it back out, I've found many post on the goog describing this problem but never a solution.

06-11-2009, 01:27 AM	#4
Enzo Senior Member Join Date: May 2006 Location: Lansing, Michigan, USA Posts: 9,266	THat's why I suggested a few scenarios. If we know WHAT it is doing, then we can figure out WHY. If you can eyeball under the disc, you might see the laser hitting it, for example. IS the transport one large assembly that drops in? Or are the play deck and disc handler separate assemblies that work together - that have the potential to not be in alignment with each other for some reason. And have you called Numark to ask about this? __________________ Education is what you're left with after you have forgotten what you have learned.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Similar Threads

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Numark USB turntable recording to CD	Dave N.	Fun with computers	10	01-23-2008 03:34 AM