Sony excd 51 service manual

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EXCD-51

SERVICE lVlANUAL WM

Model Name Using Similar Mechanism COX-5070
CD Drive Mechanism Type MG-305X-130
Optical PictoUp Name KSS»410A
SPECIFICATlONS
CD player section AM
System Compact disc digital audio Tuning range, 530 - 1710 kHz
system Antenna terminal External antenna connector
Signal-to- noise ratio 90 dB Internieciiate frequency 10.71 MHz/450 kHz
Frequency response 10 - 20,000 Hz Sensmvfiy 30 UV
Wow and flutter Below measurable limit 7 _ _
Laser Diode Properties Power amplifier section
Material GQAIAS Outputs Speaker outputs
Wavelength 780 nm (sure seal connectors)
Emission Duration Continuous . Speaker impedance 4 _ 3 ohms
Laser out?m Power Less than 446 11W Maximum power output 30 w x 4 (at 4 ohms)
* This output is the valur measured At a distance of 200
mm fnml mi» ulrjuclizw [ms sunncc 0n the oim'mi Pick- General
up Block. Output lead Power amplifier control
lead
Tuner section Tone controls Bass :8 dB at 100 Hz
FM Treble :8 dB at 10 kHz
Tuning range 87.5 _ 1073 MHz Power requirements l2.V DC car battery
Antenna terminal External antenna connector D' . ng ground)
intermediate frequency 107 MHz imensions $21920in 887).< 58 x V7 mm
Usable sensitivity 8 dBf M t' d' . A / X E m) m /h/d)
Selectivity 75 dB at 400 kHz °" mg mes° WWW-212358" ,X 15 mm
Signal-to-noise ratio 65 dB (stereo), ( /h/d) m')
68 dB (mono) Mass Avpprox 15 kg (3 lb 5 07)
Harmonic distortion at 1 kHz Supplied accessories Parts for installation anci

0.5 7: (stereo),

0-3 ,7! (mono) connections (1 set)

Front panel case (1)

Separation 35 dB at 1 kHz
Frequency response 30 - 15,000 Hz . . _ ~ _
Capture ratio 2 d8 Dmxn mid SllltlfllflNOHS tlfl sultjvcl In (/1111an williimt

Malice.

FM/AM COMPACT DISC PLAYER
S O NY®

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TABLE OF CONTENTS

Specifications .... 1
Servicing Notes .. 2
GENERAL
Location of Controls . 3
Installation .. 4
Connections 5
DISASSEMBLY ........................................................ 8
TEST MODE 9
ELECTRICAL ADJUSTMENTS
Tuner Section 9
CD Section .. ll
DIAGRAMS
Printed Wiring Boards
- Mechanism Deck Section - ......................................... 14
Schematic Diagram
- Mechanism Deck Section - ........ . 17
Schematic Diagram - Main Section , 22
Printed Wiring Board - Main Section - .. i 27
Printed Wiring Board - Display Section . 29
Schematic Diagram - Display Section - . 31
IC Pin Function Description ................. . 33
EXPLODED VIEWS ................................................ 35
ELECTRICAL PARTS LIST ........................... 39

SERVICING NOTES

Laser Diode Properties

° Material: GaAlAs

° Wavelength: 780 nm

° Emission Duration: continuous

° Laser Output Power: less than 44.6 pW*

* This output is the value measured at a distance of 200

mm from the objective lens surface on the Optical Pick-
up Block.

CAUTION

Use of controls or adjustments or performance of pro-
cedures 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 elec-
trostatic breakdown because of the potential difference gen-
erated 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 pans.

The flexible board is easily damaged and should be handled
with care.

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).

a Be careful not to apply force on the conductor when solder-
ing or unsoldering.

Notes on chip component replacement

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

SAFETY-RELATED COMPONENT WARNINGII

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.