CD-C470E (serv.man2) - Sharp Audio Service Manual (repair manual). Page 2

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The AEL (Accessible Emission Level) of Laser Power Output
for this model is specified to be lower than Class I Requirements.
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.

Laser Diode Properties

Material: GaAIAs
Wavelength: 780 nm
Emission Duration: continuous
Laser Output: max. 0.6 mW

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.

Set name

set value

Withstanding Voltage Tester

Test voltage

4,240 VPEAK
3,000 VRMS

Set time

6 secs

Set current(Cutoff current)

4 mA

Unit

Judgment

OK: The “GOOD” lamp lights.
NG: The “NG” lamp lights and the buzzor sounds.

SHORT-CIRCUIT
AC POWER 
SUPPLY CORD

CONNECT THE PROBE
TO GND TERMINAL
OF PHONO TERMINAL 

 PROBE

AC

UNIT

WITHSTANDING
VOLTAGE TESTER

+

-

OUT

OF CHASSIS

SCREW

CAUTION-INVISIBLE  LASER  RADIATION  WHEN  OPEN.  DO  NOT  STARE  INTO 
BEAM  OR  VIEW  DIRECTLY  WITH  OPTICAL  INSTRUMENTS.

VARNING-OSYNLIG  LASERSTRÅLNING  NÄR  DENNA  DEL  ÄR  ÖPPNAD.  STIRRA
EJ  IN  I  STRÅLEN  OCH  BETRAKTA  EJ  STRÅLEN   MED  OPTISKA  INSTRUMENT.

ADVERSEL-USYNLIG  LASERSTRÅLING  VED  ÅBNING.  SE  IKKE  IND  I 
STRÅLEN-HELLER  IKKE  MED  OPTISKE  INSTRUMENTER.

VARO!  AVATTAESSA  OLET  ALTTIINA  NÄKYMÄTÖN  LASERSÄTEILYLLE.
ÄLÄ  TUIJOTA  SÄTEESEEN  ÄLÄKÄ  KATSO  SITÄ  OPTISEN  LAITTEEN  LÄPI.

VARNING-OSYNLIG  LASERSTRÅLNING  NÄR  DENNA  DEL  ÄR  ÖPPNAD.
STIRRA  EJ IN  I  STRÅLEN  OCH  BETRAKTA  EJ  STRÅLEN  GENOM  OPTISKT  
INSTRUMENT.
ADVERSEL-USYNLIG  LASERSTRÅLING  NÅR  DEKSEL  ÅPNES.  STIRR IKKE  
INN  I  STRÅLEN  ELLER  SE  DIREKTE  MED  OPTISKE  INSTRUMENTER.

LASER KLASSE 1

LUOKAN 1 LASERLAITE

KLASS 1 LASERAPPARAT

CHASSIS
SCREW