MD-X60H
– 26 –
Figure 26-3 Optical Pickup Grating Deviation
Measuring Method
Mechanism Adjustment
1. Optical pickup grating inspecting method
After the automatic adjustment is performed in the AUTO mode (test
mode) with the aid of high refection MD disc ("COMPLATE" is
displayed), the Lissajous's waveform (x-y) is adjusted.
1. Slightly loosen the 3 screws of spindle moto, and maken an
adjustment, observing the Lissajous's waveform.
2. After adjustment tighten the screw in arder of 1 , 2 , 3 .
Lead-in switch position measurement mode
Insert High reflection test disk (TGYS1)
Note: Adjust the lead-in switch position to FF85 to FFD2.
1. Loosen the screw (A) x 2 pcs. which fix the mechanism switch
PWB.
2. Retighten the screw, pressing the mechanism switch PWB in
the arrow direction, and then measure the lead-in switch
position again.
After position adjustment fix with the two screws (A). (See Fig. 26-1.)
Note: After tightening the two screws on the PWB apply Screw Lock.
Figure 26-1
Forced rotation of loading motor
While the display indication is test mode STOP state or EJECT state,
the loading motor can be forcibly rotated by press theVOL UP/DOWN
button.
7. INNER mode
Step 1
Testmode STOP state
[ t s m
e
]
Step 2
Press the TRACK EDIT button.
INNER menu
[ _ _ I N N E R _ _ ]
Step 3
Press once the MD PLAY button. INNER switch position measurement
[s
c
]
(SUBQ address and C1 error are also indicated.)
Step 4
Press once the MD STOP button. INNER menu
[ _ _ I N N E R _ _ ]
Step No.
Setting Method
Remarks
Display
Figure 26-2
Figure 26-4
Loosen the
two screws (A).
Lead In Switch
Mechanism Switch PWB
1
2
3
1
2
3
adjusting
hole
Spindle motor
Check the Lissajou's waveform,
shifting the mounting position with
a screwdriver (to be fitted into the
disc motor adjusting hole).
Spindle Motor
Adjusting hole
GND CH1
CH2
X
Y
GND (TP1131)
43 Pin of IC1101
26 Pin of IC1101
25 Pin of IC1101
EOUT (TP1133)
FOUT (TP1132)
100K
OSILLOSCOPE
470p
470p
a
b
Less than a:b = 4:1
LISSAJOUS'S WAVEFORM
100K
•
: Adress
Adjustment of magnetic head mounting position
When the magnetic head and optical pickup have been replaced, be
sure to adjust the mounting position.
For easier adjustment of mounting position move the optical pickup
to the center position, and then adjust the position.
1. Set the adjusting transparent disc 3.
2. Lower the magnetic head up-shift arm with your finger, and raise
the magnetic head.
3. Viewing the set from above, make an adjustment so that the
magnetic head aligns with the optical pickup objective lens.
4. Make sure that there is a clearance as shown in Figure 26-2 and
the magnetic head moves up and down smoothly.
Optical Head
Magnetic head
Push
Radial direction
Objective lens
Circumferential direction
