On loading a disc, my Denon DN-961FA makes a zik-zik sound as it tries to read the disc, which speeds up and slows down while this happens. Eventually, it will stop and display a code "85". This failure happened suddenly. Before this it would read a disk, and only skip occasionally. What to do?
Also, where can I find a service manual?
Try to change the laser unitKSS-240A (opticals). In most cases problem solved. The "zik-zik" sound is made by the motors in the unit as the laser tries to read the CD.
Caution, after installing the new laserunit remove the short circuits on the laserunit itself. This it put there just to protect the laser from static energie faulure during repair.
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Dave, Holding the motor spindle / laser assembly in a position where the white ribben plug in receptacle is facing in an upward position, look down to the lower left hand corner of the print board just under the plug in. You will see a small blob of solder bridging two contact points. Remove this solder bridge. I have found two new Denon assemblys with this problem.........*****
Sounds like your spindle motor is shot. What happens is, the bushings in the motor that turns the CD disk are worn. So tilting the unit will change the loading of the motor shaft to an " un-worn" spot on the bushings and the CD plays properly. The spindle motors are chepa for the most part, but the labour might bite you a little because it is a fairly involved job. If the unit is still under warranty....great...if it is just off warranty, you may get some good will service from Denon......best of luck...Rob
You seem confident enought to take it apart, have you tried cleaning the runners that the laser runs backward and forward on. Some times they collect dirt/dust and the laser can't move smoothly so it jerks and skips.