Yamaha DVD-S1700 Service Manual page 3

Laser Emitting conditions:
1) When the Top Cover is removed, and the STANDBY/ON SW is turned to the "ON" position, the laser component will emit
a beam for several seconds to detect if a disc is present. During this time (5-10 sec.) the laser may radiate through the
lens of the laser pick-up unit. Do not attempt any servicing during this period!
If no disc is detected, the laser will stop emitting the beam. When a disc is loaded, you will not be exposed to any laser
emissions.
2) The laser power level can be adjusted with the VR on the pick-up PWB, however, this level has been set by the factory
prior to shipping from the factory. Do not adjust this laser level control unless instruction is provided elsewhere in this
manual. Adjustment of this control can increase the laser emission level from the device.
Laser Diode Properties
Type: Semiconductor laser GaAlAs
Wave length: 650 nm (DVD)
790 nm (VCD/CD)
Output Power: 1.45 mW (DVD)
1.13 mW (VCD/CD)
Beam divergence: 60 degrees
VARO! : AVATTAESSA JA SUOJALUKITUS
OHITETTAESSA OLET ALTTIINA
N Ä K Y M Ä T T Ö M Ä L L E L A S E R -
S Ä T E I L Y L L E .
SÄTEESEEN.
VARNING! : OSYNLIG LASERSTRÅLNING NÄR
DENNA DEL ÄR ÖPPNAD OCH
S P Ä R R E N Ä R U R K O P P L A D .
BETRAKTA EJ STRÅLEN.
DVD-S1700
Ä L Ä K A T S O
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