Safety Precaution For Service Manual (Md-Ms722W/Ms721W Only) - Sharp MS722 - MiniDisc Recorder - Metallic Service Manual

MD-MS722/C/W/MS721W
Precaution to be taken when replacing and servicing the
Laser Pickup.
The AEL (Accessible Emission Level) of Laser Power Output
for this model is specified to be lower than Class I Require-
ments. However, the following precautions must be observed
during servicing to protect your eyes against exposure to the
laser beam.
(1) When the cabinet has been removed, the power is
turned on without a compact disc, and the Pickup is on
a position outer than the lead-in position, the Laser will
light for several seconds to detect a disc. Do not look
into the Pickup Lens.
(2) The Laser Power Output of the Pickup inside the unit
and replacement service parts have already been
adjusted prior to shipping.
(3) No adjustment to the Laser Power should be attempted
when replacing or servicing the Pickup.
(4) Under no circumstances look directly into the Pickup
Lens at any time.
(5) CAUTION - Use of controls or adjustments, or
performance of procedures other than those specified
herein may result in hazardous radiation exposure.
Precaution to be taken when replacing and servicing the laser pickup.
The following precautions must be observed during servicing to protect your eyesagainst exposure to the laser.
Warning of possible eye damage when repairing:
If the AC adaptor or batteries are connected when the top houising (disc cover) of the unit is removed, and the PLAY key is
pressed, the laser will light up during docus access (2-3 seconds). (Fig. 2-1) During the operation, the laser will lesk from the
opening btween the magnetic head and the mechanical chassis (Fig. 2-2). In order to protect your eyes, you most not look
at the laser durnd repaor. Before repaoring be sure to disconnect the AC adaptor and remove the batteries.
Magnet head
Optical pick-up
Figure 2-1
SAFETY PRECAUTION FORSERVICE MANUAL
(MD-MS722W/MS721W ONLY)
Disc cover
CAUTION
This Portable MiniDisc Recorder is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT label is located on the bottom.
Use the portable minidisc recorder only in accordance with the instructions given in
this manual and do not attempt to interfere with the interlock switch or make any
other adjustment as this may result in exposure to hazardous radiation.
Laser Diode Properties
Material: GaAIAs
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 LASERSTRÅLNING NÄR DENNA DEL ÄR ÖPPNAD OCH SPÄRRAR
ÄR URKOPPLADE. STRÅLEN ÄR FARLIG.
ADVARSEL - 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 LASERSTRÅLING NÄR DENNA DEL ÄR ÖPPNAD OCH SPÄRREN
ÄR URKOPPLAD. BETRAKTA EJ STRÅLEN.
ADVARSEL - USYNLIG LASERSTRÅLING VED ÅBNING NÅR SIKKERHEDSAFBRYDERE
ER UDE AF FUNKTION. UNDGÅ UDSETTELSE FOR STRÅLING.
Mechanism
Chassis
Disc motor
– 2 –
(Illustration: MD-MS722W)
Magnet Head
Main PWB
Optical Pick-Up
Figure 2-2
Lasar Beam