Sony CDP-M72 User Manual

CDP-M72 |
PROTECTION
OF
EYES
FROM
LASER
BEAM
DURING
SERVICING
This set employs a laser. Therefore, be sure to follow carefully the
instructions below when servicing.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
break-down
because
of
the
potential
difference
generated
by
the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also use
the
procedure
in
the
printed
matter
which
is
included
in
the
repair
parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused on
the disc reflective sureface by the objective lens in the optical pick-
up block. Therefore, when checking the laser diode emission,
observe
from
more
than
30
cm
away
from
the
objective
lens.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS
IDENTIFIED
BY
MARK
A\
OR
DOTTED
LINE
WITH
MARK
A\
ON
THE
SCHEMATIC
DIAGRAMS
AND
IN
THE
PARTS
LIST
ARE
CRITICAL
TO
SAFE
OPERATION.
REPLACE
THESE
COMPONENTS
WITH
SONY
PARTS
WHOSE
PART
NUMBERS
APPEAR
AS
SHOWN
IN
THIS
MANUAL
OR
IN
SUPPLEMENTS
PUBLISHED
BY
SONY.
1. Laser Diode Properties
* Material: GaAlAs
* Wavelength: 780nm
¢ Emission Duration: continuous
¢ Laser Output: max.44.6.W*
* This output is the value measured at a distance of about
200mm from the objective lens surface on the Optical Pick-up
Block.
2. During service, donot take the Optical Pick-up Block apart, and
do not adjust the APC circuit. If there is a breakdown in the APC
circuit (including laser diode), replace the entire Optical Pick-
up Block (including APC board).
LASER DIODE AND FOCUS SERCH OPERATION
CHECK
1. Make POWER switch on with no disc inserted and disc table
closed.
2. Confirm that the following operation is performed while observ-
ing the objective lens.
@ Confirm that laser beam is spread.
e Up and down motion of the objective lens. (3 times)
A pstehiembeche aninatouboeneo6-atthe vs eae

Sony CDP-M72 Specifications

General

Brand	Sony
Model	CDP-M72
Category	CD Player
Language	English