Sharp MD-X60H, Руководство по обслуживанию

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MD-X60H
WIRING OF PRIMARILY SUPPLY LEADS (FOR U.K. ONLY)
Precaution to be taken when replacing and servicing the
laser pickup.
The following precautions must be observed during servicing
to protect your eyesvagainst exposure to the laser.
Warning of possible eye damage when repairing:
If the AC power plug is connected when the inner cover of
the unit is removed, the laser will light up during focus
access (about 1 second) (Fig. 3-1).
During this operation, the laser will leak from the opening
between the magnetic head and cartridge holder (Fig. 3-2).
In order to protect your eyes, you must not look at the laser
during repair.
Before repairing, be sure to disconnect the AC power plug.
Figure 3-1
Figure 3-2
Magnetic Head
Optical pickup
,,,
Optical pickup
Mechanism
Chassis
Spindle Motor
Magnet Head
Laser Beam
Cartridge Holder
NG: The “NG” lamp lights and the buzzor sounds.
OK: The “GOOD” lamp lights.
Judgment
Unit
Set current (Cutoff current)
Set time
Set name
Withstanding Voltage Tester
Test voltage
Set value
4,240 VPEAK
3,000 VRMS
6 secs
4 mA
Before returning the unit to the customer after completion of a
repair or adjustment it is necessary for the following withstand
voltage test to be applied to ensure the unit is safe for the
customer to use.
Setting of Withstanding Voltage Tester and set.
PROBE
AC
OUT
UNIT
SHORT-CIRCUT
AC POWER
SUPPLY CORD CONNECT THE PROBE
TO GND OF CHASSIS
SCREW
WITHSTANDING
VOLTAGE TESTER
IMPORTANT SERVICE NOTES (FOR U.K. ONLY)
Brown
Core
Blue
AC Power
Supply Cord
Bushing AC Power
Supply Cord
Power
Transformer
Nylon Band 80mm
92LN-BAND 1318A
Figure 3-3
Screw