Sony HCD-LS1 Service Manual ▷ View online
17
DISC LOCK ARM SL
INSTALLING THE DISC LOCK ARM SL
sellotape
(Fig. F. 1)
disc lock SL ass’y
D lock spring SL
2
washer
3
disc lock arm SL
1
Apply sellotape to the disc lock SL ass’y as shown in
figure to prevent the disc lock from falling off while
removing the disc arm SL.
figure to prevent the disc lock from falling off while
removing the disc arm SL.
disc lock arm SL
disc lock pinion
(Fig. F. 2)
washer
POSITIONING OF THE DISC LOCK ARM SL IS REQUIRED. (Refer to Fig. F. 2)
(1) Place the disc lock spring SL as shown in the figure.
(2) Insert the disc lock pinion into the hole on the disc lock arm SL.
(3) Adjust the position of the disc lock arm SL until its mark meets
(2) Insert the disc lock pinion into the hole on the disc lock arm SL.
(3) Adjust the position of the disc lock arm SL until its mark meets
the V-cut of the disc lock pinion as shown in the figure.
(4) Insert the shaft hole of the disc lock arm SL into the shaft.
(5) Hook the end of the disc lock spring SL on the chassis hole as
(5) Hook the end of the disc lock spring SL on the chassis hole as
shown in the figure.
(6) Reassemble the washer in place.
(7) Peel off the sellotape. Refer to Fig. F. 1.
(7) Peel off the sellotape. Refer to Fig. F. 1.
18
STC POS GEAR SL
LDG PLATE CAM SL
2
LDG plate cam SL
1
washer
(Fig. G. 2)
(Fig. G. 1)
Note: Never use nail when
turning the emergency
gear SL.Otherwise, the
gear tooth may be broken.
gear SL.Otherwise, the
gear tooth may be broken.
emergency gear SL
d
Note: DO NOT remove the STC POS Gear
SL together with the STC Motor SL Ass’y
(Stocker) (M3), always replace it alone.
(Stocker) (M3), always replace it alone.
If they are removed at the same time and
the gear in the stocker height becomes out
of position.
the gear in the stocker height becomes out
of position.
1
washer
2
STC POS gear SL
MA chassis SL S ass’y
STC POS gear SL
c
c
b
b
Note: Assemble the STC POS gear
SL so that the mark on the
STC POS gear SL meets the
mark on the MA chassis SL
S ass’y.
STC POS gear SL meets the
mark on the MA chassis SL
S ass’y.
POSITIONING OF THE STC POS GEAR SL REQUIRED
LDG plate cam SL
emergency gear SL
Note: Never use nail when
turning the emergency
gear SL.
Otherwise the gear
tooth may be broken.
gear SL.
Otherwise the gear
tooth may be broken.
e
d
e
d
d
(Fig. G. 3)
(1) Turn the emergency gear SL in the direction of the arrow as shown
in Fig. G. 1 until it stops.
(2) Assemble LDG plate cam SL so that the center of the LDG plate cam
SL, mark on the LDG plate cam SL and the center of the shaft are
aligned on one line as shown in Fig. G. 2.
aligned on one line as shown in Fig. G. 2.
(3) Turn the emergency gear SL in revers until the marks , on
LDG plate cam SL are almost aligened as shown in Fig. G. 3. (This
operation is required to return to the mechanism in standby state.)
operation is required to return to the mechanism in standby state.)
INSTALLING THE LDG PLATE CAM SL
POSITIONING OF THE LDG PLATE CAM SL IS REQUIRED.
19
SECTION 4
ELECTRICAL ADJUSTMENT
Adjustment Location:
– MAIN R237 BOARD (Conductor Side) –
Procedure :
1.
1.
Connect oscilloscope to TP101(pin 1: RFO) and TP101 (pin
3
3
: VC) on MAIN R237 board.
2.
Press the
I/1
button to turn the power on.
3.
Put test disc (YEDS-18) in and press the u button to play-
back.
back.
4.
Adjust VR102 so that oscilloscope waveform is as shown in
the figure below. (eye pattern)
A good eye pattern means that the diamond shape (
the figure below. (eye pattern)
A good eye pattern means that the diamond shape (
) in the
center of the waveform can be clearly distinguished.
5.
After adjustment, check the RF signal level.
Forcus Bias Adjustment
Note:
1. CD Block is basically designed to operate without adjustment.
2. Use YEDS-18 disc (3-702-101-01)
3. Use an oscilloscope with more than 10 M
2. Use YEDS-18 disc (3-702-101-01)
3. Use an oscilloscope with more than 10 M
Ω
impedance.
4. Clean the object lens by an applicator with lens cleaning liq-
uid when the signal level is low than specified value with the
following adjustment.
following adjustment.
5. Adjust the focus bias adjustment when optical block is replaced.
Focus Bias Adjustment
+
–
–
MAIN R237 board
TP (RFO)
TP (VC)
TP (VC)
oscilloscope
(DC range)
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
TIME/DIV: 500 ns
level:
1.0 Vp-p
1.0 Vp-p
+0.3
- 0.2
- 0.2
10: 1
TP101
(Pin
1
: RFO)
TP101
(Pin
3
: VC)
VR102
FOCUS BIAS
ADJUSTMENT
s
20
MEMO
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