Thanks for the reply. Is this routine particular to Denon as I was working on the startup sequence (as follows) from
http://www.repairfaq.org/sam/cdfaq.htm#cdstupseq
1. Drawer closes.
2. Interlock (if present) engages.
3. Pickup resets to starting (index).
4. Laser is turned on and focus search routine is started.
5. Disc starts spinning up to 500 rpm and Constant Linear Velocity (CLV) servo is activated.
6. Tracking servo is activated to maintain laser beam centered on track.
7. At this point, data is available for digital processing.
8. Disc directory is read and displayed.
Thus I am assuming that if I get no output to turn on the laser then I will fail focus (I can not find an external focus OK on the driver). Without focus then the disk will not start. This is what is confusing me as I believed that to spin the pre-requirements were that focus is locked and there is a clock present ready to phase lock with the data coming from the disk.
Would love to hear your comments and thoughts on this as I may have the whole thing wrong in my mind.
Regards,
Rupert