CD shows no disc
hello: part of the CD shows no disc. The motor and laser do not move. The tray is working. The spindle motor spins nicely from 3V, the sled also runs normally from 3V, tray also. Switches are good. I can't measure anything plugged in, the wires are very short. + 5V and + 7V go to the unit. The drawing on the farm is missing the drawing of the CD unit. The exploded view shows CDM 28-58D10D, the panel HCMK-P3X, the ICs BA6297AFP and CXD 2515AQ. In addition, with KSS240 optics. Would anyone have an idea or a missing drawing? Valentine