*Detection of the Inside switch is performed
only when a disc is loaded for the first time
after the unit is turned on.
No disc
With disc
DVD
CD
CD
LD ON again
(only LD selected as a result of the latest medium judgment)
DVD laser lights.
CD laser lights.
With the LD selected as a result of medium judgment,
reading of S-shaped waveform data by focus search
LD OFF
LDs for CD and DVD alternately light.
Switching amp gain for FE, TE, AS, and RFENV
Power-on
Canceling locking of the INSIDE_SW
LD current measurement
Medium judgment, using disc reflectance
Loading of a disc
Moving the carriage to the focus position
Canceling offset for FE, TE, AS, RFENV, LNSC, and JIT
Focus ON
Final judgment of CD/DVD with sync signal
Coarse adjustment of focus position
Tracking actuator offset adjustment
Canceling offset for FE, TE, AS, RFENV, LNSC, and JIT
CD laser lights.
Tentative medium judgment with focus search,
disc existence judgment, and distance
measurement between the focus pseudo-S-shaped
and real S-shaped waveforms
Unloading
Spindle rotating at 2000 rpm
DVD
[4] Drive Startup Sequence