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DX-6630
CAUTION ON REPLACEMENT OF PICKUP
The laser diode in the optical pickup block is so sensitive
to static electricity, surge current and etc. that the com-
ponents- are liable to be broken down or its reliability
remarkably deteriorated.
PRECAUTIONS
1, Ground for the work-desk.
Place a conductive sheet such as a sheet of copper
(with impedance lower than 10°) on the work-
desk and place the set on the conductive sheet so
that the chassis.
2. Grounding for the test equipment and tools.
Test equipments
and toolings should be grounded
in order that their ground level is the same
the
ground of the power source.
Care should be taken with the optical pickup.
During repair, carefulley take the following precautions.
(The following precautions are included in the service
parts).
3. Grounding for the human body.
Be sure to put on a wrist-strap for grounding whose
other end is grounded.
Be particularly
careful
when
the workers
wear
synthetic fiber clothes, or air is dry.
4, Select a soldering iron that permits no leakage and
have the tip of the iron well-grounded.
5. Do not check the laser diode terminals with the
probe of a circuit tester or oscilloscope.
The optical pickup is sensitive to static electricity, surge currents, and other
high electrical
noise. and because
there is the possibility of damage
to
performance. in the handling of the pickup. the utmost care must be taken,
particularly with regard to static electricity.
|. When
checking the laser terminal. avoid making connections using the
probes of a tester or oscilloscope, or an ordinary power supply.
2. When replacing the optical pickup, first short the LD terminals and remove
the connector. Also. when attaching the new optical pickup. after attaching
the connector. unsolder the LD terminals.
EXPLODED VIEW-PARTS LIST
REF.NO.
PART NO.
DESCRIPTION
1
27100190
Chassis
2
27121238-1
Back panel
4
27300750
¢\ Bushing, cord (Strainrelief)
5
27190266
KGLS-12R, Holder
6
28140946
Cushion
7
27273112
Joint, power
9
272702144
Spacer (Main circuit pc board)
ll
27190706B
Holder, mechanism
12
28140928
t4
25 X25, Cushion
13
27141340
Bracket L
15
830440109
4TTC+10C(BC), Tapping screw
16
834430088
3TTS+8B(BC), Tapping screw
17
833430080
3TTP+8P(BC), Tapping screw
18
831130088
3TTW~+8B, Tapping screw
19
834430108
3TTS+10B(BC), Tapping screw
20
833426060
2.6TTP-6P(BC), Tapping screw
26
27110477
Front bracket ass'y <B>
27110477-1
Front bracket ass'y <S>
ol
28184429
Top cover <B>
28184430
Top cover <S>
ag
834430088
3TTS+8B(BC), Tapping screw
51
1H079121
Front panel ass'y <B>
1H080121
Front panel ass'y <S>
38
27211085-2
Tray panel <B>
272110853-1
Tray panel <S>
71
28191512
Clear plate
12
833430080
3TTP+8P(BC), Tapping screw
74
27270255
Spacer
76
27175153
Leg
Optical pickup
LD terminals
Fig. 6
NOTE:
<B>: Only Black Models
<S>: Only Silver Models
77
834430088
3TTS+8B(BC), Tapping screw
81
801364
Special screw
82
801414
Special screw
83
27175011C
Leg (Cushion)
85
29360911
Label, caution, laser
87
29360687
Label CLASS 1
88
28175158A
Insulator plate
P921
253148 or
A AS-CEE 250V 2.5A,
253130
Power supply cord
T901
2300385B
'\NPT-1015G, Power transformer
U1
1H073542-1A
NAAR~-3542-1A, Main circuit pc
board ass'y
UZ
1H073543-1
NADIS-3543-1, Display circuit pc
board ass'y
U3
1H073544-1
NAAF-3544-1, Headphone amplifier
pe board ass'y
U4
1H073545-1
NAPS-3545-1, Power supply pc
board ass'y
U5
1H073546-1
NAETC-3546-1, Syncro terminal
pc board ass'y
L901
230907
TR-16-8-16,
Core
(2nd side of power transformer)
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