Sony 16249048 service manual

Page 1

19249948

75$va MAWL

US Model

TABLE OF CONTENTS
Servicing Notes ..........................................................................

1. DISASSEMBLY

2. DIAGRAMS
2-1. IC Pin Function Description
2-2. Printed Wiring Boards
2-3, Schematic Diagram ..

3. EXPLODED VIEWS ....... l7
4. ELECTRICAL PARTS LIST ....... 20

COMPACT DISC MECHANISM

SONY

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SERVICING NOTES

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.

Laser Diode Properties
0 Material: GaAlAs
o Wavelength: 780 nm
0 Emission Duration: continuous
0 Laser Output Power: less than 44.6 pW*
* This output is the value measured at a distance of 200 mm from
the objective lens surfase 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.

Flexible Circuit Board Repalrlng

0 Keep the temperature of the soldering iron around 270 C during
repairing.

0 Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).

0 Be careful not to apply force on the conductor when soldering or
unsoldering.

Notes on chip component replacement

- Never reuse a disconnected chip component.

0 Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.

SAFETY-RELATED COMPONENT WARNING"

COMPONENTS IDENTIFIED BY MARK A OR DOTI'ED
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 PUB-
LISHED BY SONY.