53
MEP-7000
5
6
7
8
5
6
7
8
A
B
C
D
E
F
*Detection of the Inside switch is performed
only when a disc is loaded for the first time
after the unit is turned on.
N
o disc
W
ith disc
DVD
CD
CD
LD O
N
again
(only LD selected as a result of the latest medium judgment)
DVD laser lights.
CD laser lights.
W
ith 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 RFE
N
V
Power-on
Canceling locking of the I
N
SIDE_S
W
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, RFE
N
V, L
N
SC, and JIT
Focus O
N
Final judgment of CD/DVD with sync signal
Coarse adjustment of focus position
Tracking actuator offset adjustment
Canceling offset for FE, TE, AS, RFE
N
V, L
N
SC, 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 Se
q
uence