Sony excd 50 service manual

Page 1

CDX-4050 EXCD-50

SERVICE MANUAL

U8 Model

CDX-4050/EXCD-50

Canadian Modal
E Model

COX-4050
Photo : COX-4050
Model Name Using Similar Mechanism COX-5470
CD Drive Mechanism Type MG-ZOSA/S-13O

SPEClFlCATIONS
Power amplifier section Intermediate frequency
Outputs Speaker output 10.7 MHz
(sure seal connectors) Sensitivity 12 dBf
Speaker impedance 4 - 8 ohms Selectivity 70 dB at 400 kHz
Maximum power output Signal-to-noise ratio 68 dB (mono)
7W x 4 (at 4 ohms) Harmonic distortion at 1 kHz
'Measured at 14.4V 0.4% (mono)
Separation 28 d8
a, player seam Frequency response 30 - 15,000 Hz
System Compact disc digital
audio system AM
Frequency response 20 _ 20,000 Hz Tuning range E model only
Wow and flutter Below the measurable IVA}; 5,5,8 int-erv_al:_l
limit : 9 kHz/w kHz :
Signal~to-noise ratio 90 dB l switchable |
I 531 - 1,602 kHz .
Tuner section | (at 9 kHz step) I
FM "53?) 3,770?th - -
Tuning range E model only (at 10 kHz step)
713:1 art-ingiritervalz- l Antenna terminal External antenna
. so kHz/200 kHz : mmecbr
I switchable I
: 87.5 - 108.0 MHz l .
I_(a!_50_ktiz ate}?! _ J - Continued on page 2 -
87.5 - 107.9 MHz
(at 200 kHz step)
Antenna terminal External antenna FM AM COMPACT DISC PLAYER
connector

SONE

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Intermediate frequency

450 kHz
Sensitivity 35 V
General
Tone controls Bass 18 dB at 100 Hz
Treble t8 dB at 10 kHz
Loudness +10 dB at 100 Hz
+8 dB at 10 kHz
Power requirements 12V DC oar battery
(negative ground)
Current drain I A (CD playback)
15 A (during disc
loading or eject)

Operating temperature -10°C to 50°C

Dimensions Approx. 178 x 50 x 176
mm (w/h/d) not incl.
projecting parts and
controls

Mounting dimensions Approx. 182 x 53 x 155
mm (w/h/d) not incl.

projecting parts and
controls
Mass Approx. 1.5 kg
Supplied accessories Mounting hardware
(1 set)

Design and specifications subject to change
without notice.

SERVICING NOTES

Laser Diode Properties

. Material: GaAIAs

o Wavelength: 780nm

0 Emission Duration: continuous

0 Laser Output Power: less than 44.6 pW"

" This output is the value measured at a distance of
200mm from the objective lens surface 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,

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 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
handled with care.

Section

Specifications ..................

1.

TABLE OF CONTENTS

Title

GENERAL
Location and Function of Control
Playing a MD ......
Playing in Other Modes .
Tuning in a Station ~~~~~~~
Using the Memory Preset Function
lnstallation~--~
Connections ..

ooxiOiv-AAC»:

DIAGRAMS
2-1. Printed Wiring Boards (MD Section) ~~ ~ ~ 10
2-2. Schematic Diagram (MD Section) ~
2~3. Schematic Diagram (Main Section)

2-4. Printed Wiring Boards (Main Section) -------------------- 21
EXPLODED VIEWS

3vl. Front Panel Section 28
3-2. General Section ~29

3-3. Mechanism Deck Section (1) 30
3-4. Mechanism Deck Section (2) .. 31
ELECTRICAL PARTS LIST -------- . ------------------------- 32

SAFETYRE LATED COMPONENT WARNINGI!

COMPONENTS IDENTIFIED BY MARK A 0R DOTTED
LINE WITH MAFIK A ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONV PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS: MANUAL OR IN SUPPLEMENTS PUBA
LISHED BV SONY.

ATTENTION AUACOMPOSANT AVANT RAPPORT
A LA SECURITE!

LES COMPOSANTS IDENTIFIES PAR UNE MAROUE A
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