Sony cdp r 1 a service manual

Page 2

CDP-R1 a

TABLE OF CONTENTS LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
Seciton m fig;
Confirm that the movement of figure B has been activated
Specification """""""""""""""""""""""""""""""""""""""""" 1 by observing the objective lens when removing the bracket
(P) when not loading a disc and the disc table is closed
I. SERVICING NOTES (Figure A) then turn on the power switch.

Notes on Handring the optical pick-up

Block or Base Unit ..........................
Notes on Laser Diode Emission check.
Laser Diode and Focus Search Operation check~
Protection of Eyes from Laser Beam

BOLT, HEXAGON SOCKET 3X5

during serVicing ........................................................ 3
2. GENERAL
Overview ..................................................................... 4

Location of controls
Connections ............

BRACKET (P)

3~ BLOCK DIAGRAMS ..................................................... 8
4. ELECTRICAL ADJUSTMENTS ................................... 11
5. DIAGRAMS
5-1. Circuit Boards Location ~~~~~~~~~ ~13
5-2. Semiconductor Lead Layouts 14
5-3. Printed Wiring Boards 16
54. Schematic Diagram ooooooooo ~21
6. EXPLODED VIEWS .................................................... 27
7. ELECTRICAL PARTS LIST ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 32
Fig. A
Optical pick~up block
SECTION 1
SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-
UP BLOCK 0R BASE UNIT
The laser diode in the optical pick-up block may
suffer electrostatic breakdown because of the poten-
tial 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 0Conhrm that laser beam 5 spread.
handled with care. OUp and down motion of the objective lens (3 times).

Fig 8

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so
as to be focused on the disc reflective surface by the
objective lens in the optical pick-up block. There-
fore, when checking the laser diode emission, observe
more than 25 cm away from the objective lens.