CD-MD3000 (serv.man21). MD section safety precautions - Sharp Audio Service Manual (repair manual)

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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 (SW 1956) is turned on and then PLAY SW (SW 1954 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 pre-set before shipment.
    Do not attempt to re-adjust 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.

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

Optical Pickup

,,

Magnetic Head

Optical Pickup

Spindle Motor

Laser Beam

Cartridge Holder

Mechanism
Chassis

Laser Diode Properties

●

Material: GaAlAs

●

Wavelength: 785 nm

●

Pulse time:
Read mode: 0.8 mW Continuous
Write mode: max 10 mW 0.5S

min cycle 1.5S
Repetition

CAUTION - INVISIBLE  LASER  RADIATION  WHEN  OPEN  AND  INTERLOCKS  DEFEATED 
AVOID  EXPOSURE  TO  BEAM .

VARNING - OSYNLIG  LASERSTR LNING  N R  DENNA  DEL   R  …PPNAD  OCH  SP RRAR
 R  URKOPPLADE.  STR LEN   R  FARLIG.

ADVARSEL - USYNLIG  LASERSTR LING  N R  DEKSEL   PNES  OG  SIKKERHEDSL S
BRYTES.  UNNG   EKSPONERING  FOR  STR LEN.

VARO!  AVATTAESSA  JA  SUOJALUKITUS  OHITETTAESSA  OLET  ALTTIINA
N KYM T…N  LASERS TEILYLLE.   L   KATSO  S TEESEN.

VARNING - OSYNLIG  LASERSTR LING  N R  DENNA  DEL   R  …PPNAD  OCH  SP RREN
 R  URKOPPLAD.  BETRAKTA  EJ  STR LEN.

ADVARSEL - USYNLIG  LASERSTR LING  VED   BNING  N R  SIKKERHEDSAFBRYDERE
ER  UDE  AF  FUNKTION.  UNDG   UDSETTELSE  FOR  STR LING.