Safety Precaution Of Md Section For Service Manual - Sharp MD-E9000H Service Manual

MD-E9000H

SAFETY PRECAUTION OF MD SECTION FOR SERVICE MANUAL

The AEL (Accessible Emission Level) of the laser power output is less than class 1 but the laser component is capable of emitting radiation
exceeding the limit for Class 1. Therefore it is important that the following precautions are observer during servicing to protect your eyes
against exposure to the laser beam.
1) When the unit case cover is removed and LOADING SW (SW1932) is turned on and then PLAY SW (SW1934 mechanism PWB) is turned
on in a few second.
The laser will light for several second to detect a disk.
2) The laser power output of the pickup unit and replacement service parts are all factory preset before shipment.
Do not attempt to readjust the laser pickup unit during replacement or servicing.
3) Under no circumstances stare into the pickup lens at any time.
4) If laser optical unit becomes faulty, replace the complete laser optical unit.
5) CAUTION-Use of controls or adjustments, or performance of procedures other than those specified herein may result in hazardous
radiation exposure.
Laser Diode Properties
Material: GaAIAs
Wavelength: 785 nm
Pluse time:
Read mode: 0.8 mW Continuous
Write mode: max 10 m W 0.5S
CAUTION-INVISIBLE LASER RADIATION WHEN OPEN AND INTERLOCKS
DEFEATED. AVOID EXPOSURE TO BEAM.
VARNING-OSYNLIG LASERSTRÅLNING NÄR DENNA DEL ÄR ÖPPNAD OCH
SPÄRRAR ÄR URKOPPLADE. STRÅLEN ÄR FARLIG.
ADVERSEL-USYNLIG LASERSTRÅLING NÅR DEKSEL ÅPNES OG SIKKERHEDSLÅS
BRYTES. UNNGÅ EKSPONERING FOR STRÅLEN.
VARO! AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALTTIINA
NÄKYMÄTÖN LASERSÄTEILYLLE. ÄLÄ KATSO SÄTEESEN.
VARNING-OSYNLIG LASERSTRÅLNING NÄR DENNA DEL ÄR ÖPPNAD OCH SPÄRREN
ÄR URKOPPLAD. BETRAKTA EI STRÅLEN.
ADVERSEL-USYNLIG LASERSTRÅLING VED ÅBNING. NÅR SIKKERHEDSAFBRYDERE
ER UDE AF FUNKTION. UNDGÅ UDSETTELSE FOR STRÅLING.
VARO ! Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle. Älä katso säteeseen.
VARNING! Osynlig laserstralning när denna del är öppnad och spärren är urkopplad. Betrakta ej strälen.
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. 2-1).
During this operation, the laser will leak from the opening between the magnetic head and cartridge holder (Fig. 2-2).
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.
Magnetic Head
Figure 2-1
All manuals and user guides at all-guides.com
WARNINGS
min cycle 1.5S
Repetition
Optical Pickup
– 2 –


 
Magnetic Head
Laser Beam
Spindle Motor Optical Pickup
Figure 2-2
Cartridge Holder
Mechanism
Chassis