Power ON Mechanical Sequence – No Disc

 

 

 

 

Operation

Purpose

 

 

 

1.

Power On button is pressed.

IC202 retrieves start up program from Flash ROM IC205. After the

 

 

ICs are checked for basic communications, IC202 instructs Servo

 

 

IC701 to start the mechanical sequence. The servo parameters are

 

 

stored in EEProm IC201.

 

 

 

2.

Disc tray is closed (if open) and placed into a

Clamps a disc on the spindle motor platform.

 

chucked position.

 

 

 

 

3.

Sled moves the optical assembly to home position.

Sled starting point.

 

 

 

4.

Tilt Motor resets laser platform to mid position.

Presets the laser beam perpendicular to the disc for max RF.

 

 

 

5.

Sled moves outward quickly, then slows down.

Optical assembly is moving under the disc’s information area.

 

 

 

6.

Laser is turned ON momentarily during focus

Looks for a disc. Reflected light identifies a disc.

 

search.

 

 

 

 

7.

Focus search one time.

Optical assembly lens moves up then down, looking for the disc’s

 

 

information layer.

 

 

 

8.

Sled increases speed moving further outward.

Sled slows down in a second attempt to locate a disc.

 

 

 

9.

Sled slows down

 

 

 

 

10.

Laser is turned ON momentarily during focus

Looks for a disc using reflected light.

 

search.

 

 

 

 

11.

Focus search.

Looks for the disc’s information laye.

 

 

 

12.

Sled again moves quickly outward then slows,

Third attempt to locate a disc.

 

followed by laser and focus search.

 

 

 

13. Sled moves inward to home and stops.

Disc check at home position.

 

 

 

14.

Laser is turned ON momentarily.

Final attempt to identify a disc.

 

 

15. Focus search.

 

 

 

 

16.

Spindle motor rotates.

(laser is off)

 

 

17. Display reads NO DISC

User feedback

 

 

 

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Sony S530D manual Power on Mechanical Sequence No Disc