MJ-L5, SP-L5
53
Step No.
Operation Keys and Operation Method
FL Display
Status
Remarks
1
Short circuit MECH TEST MODE during the power
EJECT
Test mode
ON, or press the ESC key.
(Service remote control unit)(Fig.1)
2
Insert the test disc GGF1328 (MMD-212).
LOADING
GRT AJST
3
Press the ASES key (until RST YOBI is displayed).
RST YOBI
4
Press the PLAY key.
Preliminary adjustment result display
mode
5
Press the ASES key several times and display
GTG :
the GTG (GROOV TRACKING GAIN) value.
6
Use the F.SKIP key (UP) and the R.SKIP key (DOWN)
GTG : 4
to adjust the value of to 4 or more.
Step No.
Operation Keys and Operation Method
FL Display
Status
Remarks
1
Short circuit MECH TEST MODE during the power
EJECT
Test mode
ON, or press the ESC key.
(Service remote control unit)(Fig.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
REFO
EOUT
FOUT
Lissajous waveform
a:b = Within 3:1
3
Grating Adjustment
Connection Diagram
Adjustment
Point
4
Preliminary Adjustment