Question about Aiwa NSXAJ70 Mini System Dual Cassette Shelf System

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AIWA CD Problems

I have an AIWA NSX 5200 and an AIWA NSX V-50 mini system. Both have defective CD players - CD's not recognized and don't play, constant cycling, repeated open/close, etc. I've read about a class action law suit and recall but both seem to be distant past. The class action lawsuit site is not longer accessible. I don't think I'm alone in having this problem. These units have decent sound. Is there any way to get the CD player fixed? My email to the regional center listed by AIWA at sales@tekniton.com was returned as undeliverable. These systems still sound good when I plug in my iPod but it would be nioce to have the CD working again. Any suggestions, recommendations, or leads greatly appreciated.
Thanks very much!

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Sounds like the lasers need a POT (potentiometer) adjustment. Tools you will need are a multimeter with Ohms (preferably digital) either a #1 or #00 and #2 philips screwdriver. You will need access to the bottom of the laser. On the units I've worked on the POT faces the back of the unit. It will look like a philips head screw in a square metal casing. You should not need to completely remove the CD tray assembly but you can if you wish though I recommend removing the tray bezel Look for two legs on the side of the POT casing that go to the laser PCB. Measure the resistance across the two legs for an initial reading. On mine it was exactly 1kOhm. Now take the #1 or #00 philip screwdriver and adjust the screw to lower the resistance. POT screws are typically EXTREMELY sensitive so 1/16 of a turn can make a big difference. Start by lowering it by about 20-25%. So if the initial reading was 1kOhm aim for 750-800Ohms and test. You should use several disks for testing. If your unit is capable of CD-R/RW playback then have those available as they are generally more difficult to read. If you have playback gradually increase the resistance 5-10% until the disk is no longer readable or struggles to read. Now lower the resistance again 5-10% and retest. If all works well reassemble and enjoy. It is necessary NOT to lower the resistance too much as it will shorten the life of the laser and if too low could damage the disks. If you must go lower than 25-30% the laser is not worth salvaging. Typically 10-15% is all that is required. If you need more detail I recommend doing a search for 'xbox POT adjustment' as the procedure is essentially the same for all lasers and some xbox sites have good pictures so you can see what your doing before you dive in. Total repair time per unit will be 1/2 - 1hr, mostly spent in all the testing. Hope this helps. Good luck

Posted on Jan 29, 2009

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With the stereo all unplugged, turn it around so the back is facing you.

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