Yamaha GX-500 Service Manual Page 2

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GX-900
GX-900
TO SERVICE PERSONNEL
1. Critical Components Information.
Components having special characteristics are marked and
must be replaced with parts having specifications equal to
those originally installed.
CD Laser Diode Properties
Material : GaAlAs
Wavelength : 780 nm
Emission Duration : Continuous
Laser Output : max. 44.6 µW*
* This output is the value measured at a distance of
about 200 mm from the objective lens surface on
the Optical Pick-up Block.
CAUTION : USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE
SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.
THE COMPACT DISC PLAYER/MINI DISC RECORDER SHOULD NOT BE ADJUSTED OR REPAIRED BY ANYONE
EXCEPT PROPERLY QUALIFIED SERVICE PERSONNEL.
1
q B, G models
w B, G models
AC LEAKAGE
TESTER OR
EQUIVALENT
EQUIPMENT
UNDER TEST
INSULATING
TABLE
WALL
OUTLET
MD 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
PROTECTION OF EYES FROM LASER BEAM DURING SERVICING
This set employs a laser. Therefore, be sure to carefully follow the instructions below when servicing .
When checking the laser diode emission, keep your eyes more than 30 cm away from the objective lens.
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