Sony cdx u 300 service manual

Page 1

CDX-U300

SERVICE MANUAL us Model

Canadian Model
AEP Model
E Model

[Model Name Using Similar Mechanism CDX-USOD

SPECIFICATIONS
System Compact disc digital audio system
Frequency response 5-20000 Hz :1 dB
Wow and flutter Below measurable limit
Signal-to-noise ratio 95 dB
Outputs UNiLINK control output (a PIN)
Anaiogu audio output (RCA PIN)
Current drain 800 mA (CD playback)
800 mA (during ioading_or ejecting a
disc)
Operating temperature
-1000 to 55°C
Dimensions Approx. 305 x as x 177 mm (wlhld)
not incli projecting parts and controls
Weight Approx, 25 kg

Power requirement 12 V DC car battery (negative ground)
Suppiied accessories Disc magazine (1)
Mounting hardware (1 set)
UNiLINK cable (1)
RCA PIN cord (1)
Optional accessories Compact disc single adaptor GSA-8
Disc magazine XA»1OB
CD cleaning kit CDM»2BK

Design and specifications subject to change without notice.

COMPACT DISC PLAYER

SONE

Page 2

CDX-U3OO

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.

classified as a CLASS 1
LASER product.
The CLASS 1 LASER

CLASS I LASER PRODUCT
LUOKAN I LASERLAITE

KLASS 1 LASERAPPARAT

on the rear exterior.

SAFETY-RELATED COMPONENT WARNING! !

COMPONENTS IDENTIFIED BV MARK A 0R DOTTED
LINE WITH MARK A ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL T0 SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.

ATTENTION AU COMPOSANT AYANT RAPPORT
A LA SECURITE!

LES COMPOSANTS IDENTIFIES PAR UNE MAROUE A
sun LEs DIAGRAMMES SCHEMATIOUES ET LA LISTE
DES PIECES SONT cmrrouEs POUR LA sEcURITE
DE FONCTIONNEMENT. NE REMPLACER cES COM-
POSANTS oUE PAR DES PIECES soNv DONT LES
NUMERos SONT DONNEs DANS CE MANUEL ou
DANS LES SUPPLEMENTS PUBLIES PAR SONY.

This Compact Disc player is

PRODUCT label iS located

TABLE OF CONTENTS

Section Ltle; Page
Specifications .................................. 1
Notes on Handling the Optical Pick-Up
Block or Base Unit --------------------------- 2
1. GENERAL
Preparations ............................. 3
Installation - 3
Connections 4
2. DISASSEMBLY ----------------------- 5
3. ELECTRICAL ADJUSTMENTS
1. Focus Offset Adjustment ------------------ 9
2. Tracking Offset Adjustment ~ - r 9
3. Tracking Gain Adjustment -------- ' 10
4. Focus Gain Adjustment --------- - - ll
5, PLL Freerun Frequency Check ------------ 11
4. DIAGRAMS
4-1. IC601 System Control Microcomputer
( fl PD75116GF-F42-3BE) Port Function
Descriptiofl .............................. 12
4-2. IC501 (BA6247N) Motor Driver 1C
Operation ............................... 13
4-31 Block Diagram ------------------------- 15
4-4. Printed Wiring Boards -------------------- 18
4-5. Schematic Diagram ----------------------- 21
5. EXPLODED VIEWS -------------------- 25
6. ELECTRICAL PARTS LIST ------------ 31