Page 1
3-2.
REPLACEMENT
OF THE
PICK
UP
BLOCK
[
PRECAUTION
BLOCK]
When disconnecting or connecting the connectors PI
and P2, make sure that the P.C board (on the
BLOCK)
Do not
short circuited.
has been short circuited as shown in Fig. 3-2.
turn
BEFORE
the electricity "ON" while the P.C board is
O
REMOVING THE
PICK
Short
UP
PICK
by solder
UP
O
3-3.
REPLACEMENT
OF THE SPINDLE
MOTOR
1)
Turn the ®
(Fig.
2)
Keep the
MOTOR
3)
Remove the two
through
remove the
4)
Reassemble in reverse order.
GEAR
HOLDER
3-4), then
pull
out the
PICK
UP
BLOCK
(f direction as shown in Fig. 3-5).
SPINDLE
the hole on the
SPINDLE
LOADING
MOTOR
TURN
MOTOR.
LEVER
SLIDE GEAR.
away
MOTOR fixation
SLIDE
counter-clockwise
trom
TABLE
GEAR
the
SPINDLE
screws
(Fig. 3-5), then
Fig.
3-2
1)
Disconnect the connectors P1 and P2 on the
BLOCK.
2)
Push
the (i part of the piek up block
and
pull
it in the arrowed direction to remove the
UP BLOCK.
3)
Reassemble in reverse order.
SLIDE SHAFT
PICK
PICK
UP
Fig.
3-4
PICK-UP BLOCK
VIEW
FROM
UPPER
SIDE
^
,;.SCREW
SCREW
TURN
TABLE
Fig.
3-5
3-4.
REPLACEMENT
OF THE LOADING
MOTOR
1) Remove the LOADING
ING
MOTOR while releasing the © hooks
2)
To reassemble, push in the LOADING MOTOR and re-
place
the
LOADING
BELT,
BELT.
then remove the
(Fig.
3-4).
LOAD-
3-5.
REPLACEMENT
RCK
UP
BLOCK
TURN
TABLE
Fig.
3-3
SERVICE
6
1)
Turn the d
clockwise,
2)
Reassemble in reverse order.
MANUAL
SLIDE
then
OF THE
MOTOR HOLD
pull
out the
SLIDE
SLIDE
LEVER
MOTOR.
MOTOR
(Fig. 3-4)
Page 2
V. REPLACEMENT
5-1.
REMOVE
AND
ASSEMBLY
ADAPTOR
SPRING
ADAPTOR
SPINDLE
MOTOR
OF
SPINDLE
SPINDLE
MOTOR
1)
Pull
out the turntable. Spring
2)
Remove two Screws.
3)
Unselder two Spindle Motor
4)
Solder two wires te the new Spindle Motor.
5)
Put the new spindle Motor on the chassis
screws.
6)
Press-in the turn table en to the Motor shaft.
Adjust
the turntable so
from
chassis
become
I
^
6.6 ± 0.1
adapter
wires.
that
the hight of the turntable
mm
and Adapter.
(Fig. 5-2).
6.6+0,1
t
0
Fig.
with
5-2
two
VI.
HOW TO
1.
Set the
2.
Set the
3.
Press the Lever-outsert to
When
gear
(Fig.
Disc
Tray
gear'(B)
the
(B)
te the hele of the
6-1)
gear
on the shaft
(B)
in a loading
is set properly, fit the Hole of the
INSTALL
conditiën.
(G).
CHASSIS.
fuUy
direction
Fig.
5-1
OF THE
(Fig. 6-1)
(D).
•LEVER
OUTSERT
LOADING
4.
Set the
When
to the
5.
Set the
When
gear
(A)
MECHANISM
gear
(C)
on the shaft
the
gear
(C) is set properly, fit the
MARK
the
(F). (Fig. 6-1)
gear
(A)
en the shaft
gear
(A)
is set properly, fit the Hole of the
to the Hele of the
(H).
(I).
CHASSIS.
MARK
(Fig. 6-1)
-GEAR(B)
•
HOLE
(E)
-SERVICE
MANUAL-
Mg.
6-1
Page 3
VII.
ADJUSTMENT
7-1.
ADJUSTMENT
7-1-1.
Pick-up Inclination Adjustment
Fine
inclination adjustment in the jitter direction is
WHEN
CHANGING
THE
PICK-UP
necessary after replacing the pick-up. Adjustment is
performed by rotating the Jitter Direction Inclination
Adjustment Screw.
1)
Connect the oscilloscope between J202
signal)
and GND.
2)
Set the unit in the
NOTE:
"How to make
3)
Press the
(FF)/(RF)
(Fig.
7-1)
|TEST
MODE
test
in
the Servo Adjustment Procedure.
Buttons so
4
Mode" has
that
the Jitter
been
pin(3)(HF
written
Direction Adjustment Screw may situate to the middle of
the Inclination Adjustment Hole.
4)
Confirm
Fig.
5)
Turn
Screw
until
in Fig.
6)
After adjustment confirm
within
Check
Fig.
that
the HF signal (Eye-Pattern) shown in
7-2.
right and left the Jitter Direction Adjustment
(Fig. 7-1) with the hexagonal driver (2.4 mm)
the HF Signal
pattern
7-3.
the
range
indicated below.
that
the HF signal
7-3
rBl.
change
that
the HF signal
pattern
(Fig.
1-1)
from (A) to (B)
level
is clear as shown in
is
Jitter
Direction
Adjustment
2Q0ir.V
Inclination
Screw
SOOnS
Fig.
7-1
Minimize
the
signal
2 4
+°-Sv
-I.P
distortion
itself
of
Peaks
must
in
this
become
area
flat
Fig.
7-2
(A) :
HF
(B) : HF
Signal
Signal
before jitter
after jitter
direction
direction
adjustment
adjustment
Fig.
7-3
Page 4
8
MANUAL
SERVICE
Fig.
7-4
according to the (7-2) Servo adjustment.
when pick-up is replaced. Adjust the circuit
It
is required to adjust Servo control circuit
NOTE:
T.E
been
made
so, DO NOT touch this.
adjustment for individual characteristics has already
appropriate
(Laser
Diode)
(Automatic Power Control) Circuity
Refer to 7-2 Servo adjustment.
E-F
Balance
the VRl by the pick-up block. However
power of the pick-up. The LD power can be adjusted by
This
is a servo circuit to maintain the LD
7-14.
APC
must be
performèd.
When
the pick-up is changed. E-F balance adjustment
7-1-3.
Readjustment of
axis
the
(Fig.
7-4)
that
the optical
fixing
maximum.
adjustment screw so
1-1,
Fig.
6-1)
that
3
MODE
Iarge.
signal
becomes
axis
hall.
(Fig.
Button so
become
(FF)/(RF)
|TEST
(Truck
Error)
4)
Adjust the optical
GND.
3)
Connect the oscilloscope between J202 pin (2) and
axis
adjustment
adjustment screw situate to the middle of the optical
2)
Press tlie
1)
Set tlie unit in
axis
adjustment is necessary.
This
is turn interferres with the tracking servo, so optical
pick-up tracking errors
If
the meclianical eccentricity is iarge when
7-1-2.
Optical Axis Adjustment
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