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D-EJ119/EJ120/EJ121
SERVICE MANUAL
Ver. 1.3 2005.04
System
Compact disc digital audio system
Laser diode properties
Material: GaAlAs
Wavelength: λ = 780 nm
Emission duration: Continuous
Laser output: Less than 44.6 µW (This output is the value measured at a
distance of 200 mm from the objective lens surface on the optical pick-up
block with 7 mm aperture.)
Power requirements
• Two LR6 (size AA) batteries: 1.5 V DC x 2
• AC power adaptor (DC IN 4.5 V jack):
220 V, 50 Hz (Model for China)
120 V, 60 Hz (Model for Mexico)
Dimensions (w/h/d) (without projecting parts and controls)
Approx. 135.8 x 28.2 x 135.8 mm (5
Mass (excluding accessories)
Approx. 180 g (6.4 oz)
Operating temperature
5°C - 35°C (41°F - 95°F)
Sony Corporation
9-879-350-04
2005D02-1
Personal Audio Group
Published by Sony Engineering Corporation
© 2005.04
Photo : D-EJ121
Model Name Using Similar Mechanism
CD Mechanism Type
Optical Pick-up Name
SPECIFICATIONS
3
⁄
x 1
1
⁄
x 5
3
⁄
in.)
8
8
8
Australian Model
D-EJ100/EJ101/EJ101CK/EJ106CK
CDM-3325ERV
DAX-25EV
Supplied Accessories
D-EJ119
a*
1
AC power
adaptor (1)
Headphones/
a
earphones (1)
Remote control (1)
–
*1 Not supplied with U.K. model
*2 Not supplied with US, Latin American and Canadian models
*3 Supplied with European, Canadian and Latin American models
Design and specifications are subject to change without notice.
PORTABLE CD PLAYER
US Mpdel
Canadian Mode
D-EJ120
AEP Model
D-EJ119/EJ120
E Model
D-EJ120/EJ121
D-EJ121
D-EJ120
D-EJ121
a*
1,
2
a
*
a
a
a*
3
a
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Table of Contents
Related Manuals for Sony Walkman D-EJ121
Summarization of Contents
SPECIFICATIONS
Supplied Accessories
Lists the accessories provided with the player models.
SAFETY AND HANDLING PRECAUTIONS
General Safety Warnings
Critical warnings for laser radiation, electrostatic discharge, and electrical safety.
Unleaded Solder Handling
Guidelines for using unleaded solder, including temperature and viscosity properties.
SERVICING NOTES
Optical Pick-Up and Laser Diode Handling
Precautions for handling the optical pick-up, laser diode emission, and focus search.
Test Mode Activation
Procedure for activating the test mode for diagnostics and display checks.
GENERAL INFORMATION
External Component Identification
Diagram illustrating player controls, ports, and external features.
DISASSEMBLY PROCEDURES
Overall Disassembly Flow
Overview of the step-by-step process for disassembling the unit.
Cabinet and Lid Removal
Instructions for removing the upper lid and cabinet assemblies.
Mechanism and Board Removal
Steps for detaching the CD mechanism deck and the main board.
Motor and Optical Pick-Up Components
Guidance on removing the sled motor, optical pick-up, and turntable motor.
ELECTRICAL ADJUSTMENTS
RF Level Check
Procedure for verifying RF signal level using an oscilloscope and reference waveform.
DIAGRAMS AND SCHEMATICS
Block Diagram
High-level overview of the internal circuitry and signal flow.
Printed Wiring Boards
Layouts of the main board's component and conductor sides.
Schematic Diagrams
Detailed circuit diagrams illustrating component interconnections.
IC Block Diagrams and Pinouts
Internal diagrams for ICs and detailed pin function descriptions.
IC Pin Function Descriptions
Detailed pin-out and function descriptions for major ICs.
EXPLODED VIEWS AND PARTS LIST
Upper Lid Section
Exploded view and parts list for the upper lid assembly.
Cabinet and Battery Case Section
Exploded view and parts list for the cabinet and battery case.
Optical Pick-Up Section
Exploded view and parts list for the optical pick-up mechanism.
ELECTRICAL PARTS LIST
Capacitors and Resistors
Lists of capacitors and resistors with part numbers and specifications.
Semiconductors and Components
Lists of diodes, transistors, ICs, coils, and connectors with part numbers.
Accessories and Manuals
Lists of included accessories and instruction manuals.
REVISION HISTORY
Revision Details
Record of changes and updates made to the service manual.
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