XC-IS21MD
60
Step No.
Operation Keys and Operation Method
FL Display
Status
Remarks
1
Short circuit MECH TEST MODE during the power
EJECT
Test mode
ON.
(Fig.6-1)
2
Insert the test disc GGF1328 (MMD-212).
LOADING
GRT AJST
Step No.
Operation Keys and Operation Method
FL Display
Status
Remarks
1
Short circuit MECH TEST MODE during the power
EJECT
Test mode
ON.
(Fig.6-1)
2
Insert the test disc GGF1328 (MMD-212).
LOADING
GRT AJST
Grating adjustment status
3
Press the PLAY key.
LON :
Playback is started in tracking open
LAg :
status. (The servo is closed only for
GEG :
focus and spindle.)
4
Connect an oscilloscope according to the following
GRT AJST
Lissajous waveform a:b = Within 3:1
connection diagram and loosen the screw
A
at the side
of the adjustment hole. Turn the hole with a screwdriver
until the Lissajous waveform becomes as shown in the
figure, and then tighten the screw
A
.
5
Press the STOP key.
Adjustment end
Screw
A
Adjustment
Hole
Ocsilloscope
b
a
470p
470p
100k
Ω
100k
Ω
MD CORE MAIN UNIT
SIDE A
EOUT
FOUT
Lissajous waveform
a:b = Within 3:1
3
Grating Adjustment
Connection Diagram
Adjustment
Point
4
Preliminary Adjustment
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