Xc-Is21Md - Pioneer XC-IS21 MD Servise Manual

XC-IS21MD

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3 7 63 1515 0
3 Grating Adjustment
Step No. Operation Keys and Operation Method
1 Short circuit MECH TEST MODE during the power
ON.
(Fig.6-1)
2 Insert the test disc GGF1328 (MMD-212).
3 Press the PLAY key.
4 Connect an oscilloscope according to the following
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.
Connection Diagram
TE
L 13942296513
EOUT
REFO
4 Preliminary Adjustment
Step No. Operation Keys and Operation Method
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1 Short circuit MECH TEST MODE during the power
ON.
(Fig.6-1)
.
2 Insert the test disc GGF1328 (MMD-212).
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Ocsilloscope
100kΩ
470p
470p
100kΩ
MD CORE MAIN UNIT
FOUT
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2 9
8
FL Display Status
EJECT Test mode
LOADING
GRT AJST Grating adjustment status
LON : Playback is started in tracking open
LAg : status. (The servo is closed only for
GEG : focus and spindle.)
GRT AJST Lissajous waveform a:b = Within 3:1
Adjustment end
b
Lissajous waveform
a:b = Within 3:1
SIDE A
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3 6 7 1 3 1 5
Screw A
FL Display Status
EJECT Test mode
co
.
LOADING
GRT AJST
9 4 2 8
Remarks
a
0 5 8 2 9 9 4 2 8
Adjustment
Hole
Adjustment
Point
Remarks
m
9 9
9 9