Pioneer PDR-L77, Service Manual

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3
PDR-L77
IMPORTANT
T H I S P I O N E E R A P P A R A T U S C O N T A I N S
LASER OF CLASS
ΙΙΙ
b.
SERVICING OPERATION OF THE APPARATUS
S H O U L D B E D O N E B Y A S P E C I A L L Y
INSTRUTED PERSON.
LASER DIODE CHARACTERISTICS
MAXIMUM OUTPUT POWER: 23 mW
WAVELENGTH: 778 – 787 nm
LABEL CHECK
NVXJ type
MYXJ type
MYXJ type
Put on Top Plate
Put on Top Plate Put on Top Plate
MYXJ and NVXJ types
KUXJ/CA Type
Put on Bottom Base
Put on Bridge
USYNLIG LASERSTRÅLING VED ÅBNING NÅR SIKKERHED SAF-
BRYDERE ER UDE AF FUNKTION.
UNDGÅ UDSÆTTELSE FOR STRÅLING
UNSICHTBARE LASER-STRAHLUNG TRITT AUS, WENN DECKEL
(ODER KLAPPE) GEÖFFNET IST! NICHT DEM STRAHL AUSSETZEN!
VRW1094
ADVARSEL
VORSICHT!
1. Laser Interlock Mechanism
The position of the switch (S601) on the SERVO
MECHANISM Assy for detecting loading state is detected
by the system microprocessor, and the design prevents
laser diode oscillation when the switch (S601) is not on
CLMP terminal side (CLMP signal is OFF or high level.).
Thus, the interlock will no longer function if the switch
(S601) is deliberately set to CLMP terminal side (low
level).
The interlock also does not function in the test mode
∗
.
Laser diode oscillation will continue, if pin 1 of M51593FP
(IC101) on the PRE-AMP BOARD ASSY mounted on the
CD-R PICKUP is connected to GND, or pin 19 is
connected to low level (ON), or else the terminals of Q101
are shorted to each other (fault condition).
2. When the cover is opened with the servo mechanism
block removed and turned over, close viewing of the
objective lens with the naked eye will cause exposure to a
Class 1 laser beam.
Additional Laser Caution
∗
Refer to page 51.