Sony 16229172 service manual

Page 1

16229172

SERVICE MANUAL USMode/

TABLE OF CONTENTS

Section m Page
Servicing Note ................................. 2
1. DISASSEMBLY ------------------------ 3

2. DIAGRAMS

2-1. Printed Wiring Boards -------------------- 8
2-2. Schematic Diagram ---------------------- 11
23. IC Pin Function Description ---------------- 15
3. EXPLODED VIEWS -------------------- 17
4. ELECTRICAL PARTS LIST ------------ 20

COMPACT msc MECHANISM
S O N EC

Page 2

SERVICING NOTE

NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer
electrostatic breakdown because of the potential difference
generated by the charged electrostatic load, etc. on clothing
and the human body.

During repair, pay attention to electrostatic breakdown 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

0 Wavelength: 780 nm

I Emission Duration: continuous

0 Laser Output Power. less than 446 ,u W

* This output is the value measured at a distance of

200 mm from the objective lens surfase on the
Optical Pick-up Blockl

CAUTION

Use of controls or adjustments or performance
of procedures other than those specified herein
may result in hazardous radiation exposure

Flexible Circuit Board Repairing

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

0 Never reuse a disconnected chip component.
0 Notice that the minus side of a tantalum capacitor may
be damaged by heat,

SAFETY-RELATED COMPONENT WARNINGII

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.