NAD 517 CD changer skipping on playback

[@THOMMGB]

Thanks for doing this video. I learned a lot. I have a Panasonic CD player that would arbitrarily jump around the song on occasion. After watching your video, I found a very small, white piece of "something" on the lens, near the edge. I didn't think anything so near the edge would affect the laser operation, but it did. Once I cleaned it off, my CD player plays perfectly. This player was built in June, 1993 so it's pretty old. It plays commercial CD's perfectly. It sometimes struggles a bit with home-made CD's, but by and large, it still does a fine job. Have you ever done a video where the lasers output is getting somewhat tired and the steps you can take to adjust the laser to bring it back to normalcy? I've heard there is a method, but I've never seen it. Thanks again for your very instructional videos. Best regards, Tom

[@michaeljones701]

Had same issue with NAD 523 bought cheap as previous owner said it "occasionally skips, might need a new laser" - like every 5 seconds as it turned out - gave the lens and all around it a good clean as it was pretty dirty inside, and it works perfect now. Sometimes the cheap fixes work out fine.

[@jasejj]

I have just repaired one of those 200-disc Sony changers with a similar problem to this. It would jump when tapped and also some discs wouldn't play properly at all (wobbled in the player and the pickup couldn't keep up with the refocusing -- either stabilising the disc with a finger or turning the unit on its side fixed the problem temporarily). Turned out the magnet on the puck part of the clamping mechanism was weak; I just glued one of those cheap neodymium magnets onto the back of the puck and all is well.

[@unknownrecords176]

Just wondering why you did not clean the rest of the dust that was around the lens, and a quick blow out with an air compressor inside the unit?

[@redcatimaging]

Thanks for sharing :), this was really an interesting "repair" and might come in handy to know :D.

[@bjl1000]

I had one that skipped when the laser head moved. I cleaned the laser rack gear with an acid brush and now it's good.

[@zx8401ztv]

Nice to have a easy one for a change :-D Niccoteen is the stuff i hate, brown sticky goo just makes a mess of everything and bloody stinks. A bowl full of warm water and washing up liquid is my way, after im finished the water is poo brown, yuck :-(, im glad i dont smoke. I have an old phillips cd150 cd player, but it has an odd fault, it works but then decides it cant see the disk, very random, i cleaned the lazer lense in and out, checked voltages, connections and all seemed fine........... next day dead again, my mate has the same type of unit, same exact fault. Have you ever had one to repair?

[@mhd316]

What will it be when you open the disc loader and return at the same time? I have a pionner XV-HTD1

[@togst]

Perhaps I should start to convince the others in the household here to not smoke indoors anymore. I personally don't smoke, but the room I keep most of my stuff in (including very expensive optical players) have been designated as the smoking room. Would be really sad to see my (some irreplaceable) equipment fail prematurely due to the smoke. Wasn't aware it actually would cause it any harm.

[@12voltvids]

togst not only to the equipment but to anyone living in there. a good friend of mine is battling terminal lung cancer at age 52. he never smoked but both his parents (both dead of lung cancer) as is his older brother. the owner of the first shop I worked at also had lung cancer and he smiled like a chimney, but he also inhaled lots of really bad solvents and cleaners that were common in the electronic service business in the 60 and 70. stuff like carbon tetrochloride. bad stuff.

[@holgerdrewsen7947]

the mech of this one and the rotel is the same as a cdc brand i have, obviously different audio boards though

[@crashbandicoot4everr]

That intro man!

[@jerryspann8713]

I have a CD changer that was not working at all, and I cleaned the lens. it will play now, but only the first two tracks. if I try to play anything further it will skip and cut out. could that be a bad laser

[@12voltvids]

Check the sled gears for crud that could be binding it. A single grain of sand in the teeth was the culprit in many past repairs. All it takes is a bit of grit on a disk, and when the disk spins up they grit gets thrown out to the side and into that nice greased sticky surface to stick to and cause troubles down the road.

[@gibbeh3737]

Thank you i am going to try this on my yamaha cdc-625

[@SimX9000]

I'm guessing this thing had no buffer at all?

[@jasejj]

None of the early 1990s ones did. It was only in the late 1990s and 2000s that they started implementing buffering technology.

[@mdzacharias]

Looks exactly like a Marantz CC-52. Ugh. Watch out for shorted spindle motor - can be intermittent, too.

[@12voltvids]

Yup, seen that problem before. Devolops a dead spot, and if it stops at that point you are dead in the water. A quick test for that is if the disk doesn't start spinning, turn it slightly during the focus search. If it starts spinning, then it is the motor that is bad.

[@mdzacharias]

Unless it's shorted on both halves... :-)