3
CDR-850
IMPORTANT
THIS PIONEER APPARATUS CONTAINS
LASER OF CLASS ΙΙΙ b.
SERVICING OPERATION OF THE APPARATUS
SHOULD BE DONE BY A SPECIALLY
INSTRUTED PERSON.
LASER DIODE CHARACTERISTICS
MAXIMUM OUTPUT POWER: 23 mW
WAVELENGTH: 778 – 787 nm
1. Laser Interlock Mechanism
The position of the switch (S601) 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
pickup assembly 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 53.
LABEL CHECK
KU/CA type
Printed on Rear Panel
Printed on Rear Panel
MY Type
MY Type MY Type
1. SAFETY INFORMATION
......................................
2
2. EXPLODED VIEWS AND PARTS LIST
................
4
3. SCHEMATIC DIAGRAM
.....................................
10
4. PCB CONNECTION DIAGRAM
..........................
34
5. PCB PARTS LIST
...............................................
48
6. ADJUSTMENT
....................................................
53
CONTENTS
7. GENERAL INFORMATION
................................
59
7.1 PARTS
.........................................................
59
7.1.1 IC
...........................................................
59
7.1.2 DISPLAY
................................................
74
7.2 BLOCK DIAGRAM
......................................
76
7.3 DIAGNOSIS
................................................
78
8. PANEL FACILITIES AND SPECIFICATIONS
....
83
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