Denon DCD-670 PCM Audio Tech Compact Disc Player includes Remote - READ DESCR.

Description

Denon PCM Audio Technology Compact Disc Player DCD-670. Remote control included.
Condition is For Parts / Not Working. It plays CDs, but skips back to previous tracks, or back a minute or so, or even a few seconds. It does this randomly, but almost constantly with the lowest track numbers, especially tracks one and two. It seems to do it less with the later tracks. Sometimes it really struggles to play track one at all, even getting stuck for a minute or two before starting to play.
I opened it up and used a dry Q tip to gently wipe off any dirt or dust on the laser’s lens. I cleaned the laser sled track with 99% isopropyl alcohol and greased it with white lithium grease and wiped off any excess grease. I noticed that the spindle motor spun to a stop almost instantly when I hit the Stop button. It should spin freely. Also, it was rather noisy at one point when trying to play track one. CD players read from the inside of the disc to the outside, opposite of how vinyl records are played. And CDs constantly adjust the speed of the spinning of the disc (RPMs, if you will) so that the linear digital optical track data geometrically goes by the laser reader at a constant rate. Therefor, in all CD players, track one (towards the inside) spins a bit faster than the last track (towards the outside). So it’s as if the spindle motor struggles to spin fast enough. That and the noise and the fact that it stops spinning so quickly suggests that the spindle motor’s bearings are going bad or need to be oiled. Without desoldering the motor from the bottom of the circuit board in the drive assembly, I applied some sewing machine oil to the motor as best as I could, and played a CD on random repeat for about eight hours straight, with little to no improvement. Perhaps desoldering the motor would give you better access to the tiny holes on the motor canister to apply oil. That might fix the problem, if the bearings aren’t completely shot. Or if you can source a new spindle motor, that might be a good fix. Otherwise this unit seems to be fine. Audio comes out of the RCA jacks on the back as well as the headphone jack on the front. The VFD display looks and works great.
When everything was working great, this unit’s features were quite impressive for transferring CDs to cassette tape. It has fade in and out capabilities and can rearrange tracks to fit the best on each side of a cassette, so as to minimize blank space at the end of Side A. You just have to program the machine for what length (in minutes) of a cassette you have. Obviously, you need a cassette tape deck to plug into a CD player model such as this one (but one that works) to harness these great features. But this is ideal for recording CDs to tape for use in boomboxes! So if you have the know-how to fix this unit, or you just need parts, it may be just the treasure you’re looking for! I just want to save it from the landfill as it’s an awesome piece of equipment, and I believe it’s only the spindle motor bearings that have gone bad or need oil. I don’t currently have the time to dive deeper into a repair project such as this. But you are welcome to give it a try.
I’ve detailed all the troubleshooting I could think of with this unit, but if you have further questions, please don’t hesitate to contact me through eBay and I’d be more than happy to answer your questions the best I can. Best of luck to you.