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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Awai NSX-3500: CD player doesn't recognize CD
Hi,
Picked up an Awai NSX-3500 at a yard sale for $5.00 because the lady said CD player doesn't work. So I though, not bad if I can fix it. After taking it apart and checking on the internet, it seems Awai had quite a few lawsuits due to their CD player's being faulty and not working even after being repaired several times. But I went ahead and got a new laser pickup for it, but that didn't solve the problem. Here's what it does: -Load a CD. -CD tray spins around to spindle/pickup. -Laser pickup will move horizontally and laser "eye" moves vertically trying to adjust or obtain data. During this time, the CD does not spin even though I've checked the spindle motor and it will run with voltage applied. -CD tray will rotate to location 2, repeat above, then go to location 3, repeat and then standby. Any ideas or should I just throw it in the trash. Thanks for any help. |
#2
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Awai NSX-3500: CD player doesn't recognize CD
A new pickup has a solder short, that is 2 adjacent solder pads, shorted
together with solder, which must be cleared (unsoldered) before the new pickup will work. Mark Z. -- Please reply only to Group. I regret this is necessary. Viruses and spam have rendered my regular e-mail address useless. wrote in message ... Hi, Picked up an Awai NSX-3500 at a yard sale for $5.00 because the lady said CD player doesn't work. So I though, not bad if I can fix it. After taking it apart and checking on the internet, it seems Awai had quite a few lawsuits due to their CD player's being faulty and not working even after being repaired several times. But I went ahead and got a new laser pickup for it, but that didn't solve the problem. Here's what it does: -Load a CD. -CD tray spins around to spindle/pickup. -Laser pickup will move horizontally and laser "eye" moves vertically trying to adjust or obtain data. During this time, the CD does not spin even though I've checked the spindle motor and it will run with voltage applied. -CD tray will rotate to location 2, repeat above, then go to location 3, repeat and then standby. Any ideas or should I just throw it in the trash. Thanks for any help. |
#3
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Awai NSX-3500: CD player doesn't recognize CD
Picked up an Awai NSX-3500 at a yard sale for $5.00 because the lady
said CD player doesn't work. So I though, not bad if I can fix it. Not a bad deal if you know what to do to fix it. And the brand is spelled "Aiwa." I went ahead and got a new laser pickup for it, but that didn't solve the problem. Here's what it does: -Load a CD. -CD tray spins around to spindle/pickup. -Laser pickup will move horizontally and laser "eye" moves vertically trying to adjust or obtain data. During this time, the CD does not spin even though I've checked the spindle motor and it will run with voltage applied. As suggested by another poster, there is a solder short that is deliberately applied on the pickup which must be undone to allow the pickup to function. This solder short is designed to prevent static discharge damage to the pickup during its time in storage and in transit. Usually, the solder glob is located within proximity of the laser gain potentiometer. Use a soldering iron and desoldering braid, usually obtainable at RadioShack. DO take precautions concerning electrostatic discharge and wear a grounding strap on your wrist connected to good earthing. The internal components of the pickup can be destroyed by electrostatic discharge. ONLY remove the solder. DO NOT adjust anything on the pickup as Aiwa pickups are usually made by Sony, and Sony calibrates their pickups optimally at the factory. BTW, your old pickup might still have been good. The CD reading problems with 3 disc Aiwa shelf systems were usually due to excessive dust accumulation on the optical parts of the pickup. Cleaning the objective lens and airblasting the insides of the pickup usually brings the player back into operating condition, although there are no guarantees that the problem won't happen again, even with new pickups, as this has been a problem with Aiwa shelf systems with 3-disc changers. - Reinhart |
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Aiwa NSX-3500: CD player doesn't recognize CD
I've done a continuity check on the ribbon cables and those checked out fine. Thanks for all the feedback. On 4 Jul 2004 18:00:45 -0700, (b) wrote: check ribbon cable linking pickup to board and any tracking/offset/'kickstart' pots etc. maybe controller chip or transistor is faulty. Ben wrote in message . .. Hi, Picked up an Awai NSX-3500 (snip) Here's what it does: -Load a CD. -CD tray spins around to spindle/pickup. -Laser pickup will move horizontally and laser "eye" moves vertically trying to adjust or obtain data. During this time, the CD does not spin even though I've checked the spindle motor and it will run with voltage applied. -CD tray will rotate to location 2, repeat above, then go to location 3, repeat and then standby. |
#5
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Aiwa NSX-3500: CD player doesn't recognize CD
Removed the short that was soldered on the new cd pickup assembly.
Unfortunately, same ol' story. Oh well, at least the stereo works on it. On 4 Jul 2004 18:00:45 -0700, (b) wrote: check ribbon cable linking pickup to board and any tracking/offset/'kickstart' pots etc. maybe controller chip or transistor is faulty. Ben wrote in message . .. Hi, Picked up an Awai NSX-3500 (snip) Here's what it does: -Load a CD. -CD tray spins around to spindle/pickup. -Laser pickup will move horizontally and laser "eye" moves vertically trying to adjust or obtain data. During this time, the CD does not spin even though I've checked the spindle motor and it will run with voltage applied. -CD tray will rotate to location 2, repeat above, then go to location 3, repeat and then standby. |
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Aiwa NSX-3500: CD player doesn't recognize CD
I have seen people inadvertantly install the flat cable backwards on these -
that is, with the metal conductor side not matching the conductor side in the jack. Mark Z. -- Please reply only to Group. I regret this is necessary. Viruses and spam have rendered my regular e-mail address useless. wrote in message ... Removed the short that was soldered on the new cd pickup assembly. Unfortunately, same ol' story. Oh well, at least the stereo works on it. On 4 Jul 2004 18:00:45 -0700, (b) wrote: check ribbon cable linking pickup to board and any tracking/offset/'kickstart' pots etc. maybe controller chip or transistor is faulty. Ben wrote in message . .. Hi, Picked up an Awai NSX-3500 (snip) Here's what it does: -Load a CD. -CD tray spins around to spindle/pickup. -Laser pickup will move horizontally and laser "eye" moves vertically trying to adjust or obtain data. During this time, the CD does not spin even though I've checked the spindle motor and it will run with voltage applied. -CD tray will rotate to location 2, repeat above, then go to location 3, repeat and then standby. |
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Aiwa NSX-3500: CD player doesn't recognize CD
Do you know where I can find schematics for the CD tray/mechanism?
Since the spindle motor doesn't try to spin at all, I'm thinking there might be something else I need to look at.(motor works when applying voltage directly) Thanks. On Mon, 5 Jul 2004 06:57:21 -0500, "Mark D. Zacharias" wrote: I have seen people inadvertantly install the flat cable backwards on these - that is, with the metal conductor side not matching the conductor side in the jack. Mark Z. |
#8
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Aiwa NSX-3500: CD player doesn't recognize CD
Union Electronics in an Aiwa distributor, and may be able to get you the
service manual. They're relatively expensive. 800-648-6657. If the laser pickup does not achieve focus, the disc will not spin. This is almost universal these days. At most an Aiwa will try several times to "pre-spin" the disc while focus is attempted. When focus fails, it gives up entirely. Mark Z. -- Please reply only to Group. I regret this is necessary. Viruses and spam have rendered my regular e-mail address useless. wrote in message ... Do you know where I can find schematics for the CD tray/mechanism? Since the spindle motor doesn't try to spin at all, I'm thinking there might be something else I need to look at.(motor works when applying voltage directly) Thanks. On Mon, 5 Jul 2004 06:57:21 -0500, "Mark D. Zacharias" wrote: I have seen people inadvertantly install the flat cable backwards on these - that is, with the metal conductor side not matching the conductor side in the jack. Mark Z. |
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