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SERVICE MANUAL
Ver 1.1 1999.01
Photo : MZ-E44 (SILVER)
US and foreign patents licensed from Dolby
Laboratories Licensing Corporation
MD Section
Audio playing system
Minidisc digital audio system
Laser diode properties
Material : GaAlAs
Wavelength :
=790nm
Emission duration : continuous
Laser output : less than 44.6 W*
* This output is the value measured at a distance of 200 mm from the
objective lens surface on the optical pick-up block with 7mm aperture.
Revolutions
400 rpm to 900 rpm (CLV)
Error correction
Advanced Cross Interleave Reed Solomon Code (ACIRC)
Sampling frequency
44.1kHz
Coding
Adaptive Transform Acoustic Coding (ATRAC)
Modulation system
EFM (Eight to Fourteen Modulation)
Number of channels
2 stereo channels
1 monaural channel
Frequency response
20 to 20,000 Hz ± 3 dB
Wow and Flutter
Below measurable limit
Outputs
Headphones : stereo mini-jack, maximum output level 5mW+5mW,
load impedance 16 ohm
MICROFILM
MZ-E44/E45
Photo : MZ-E45 (GRAY)
Model Name Using Similar Mechanism
MD Mechanism Type
Optical Pick-up Mechanism Type
SPECIFICATIONS
General
Power requirements
Rechageable battery (supplied)
Nickel metal hydride rechargeable battery NH-9WM (N)
One LR6 (size AA) alkaline battery (not supplied)
Sony AC Power Adaptor AC-E15L (not supplied) connected at the
DC IN 1.5V jack
Battery operation time
Batteries
Nickel metal hydride
Rechargeable battery (NH-9WM (N))
One LR6 (size AA)
Sony alkaline dry batteries
Nickel metal hydride (NH-9WM (N)) +
One LR6 (size AA)
Dimensions
Approx. 87 x 17.8 x 91.5 mm (w/h/d)
1
23
(3
/
x
/
x 3
2
32
Mass
Approx. 115 g (4.1 oz.) the player only
Approx. 155 g (5.5 oz.) incl. a premastered MD and a nickel
metal hydride rechargeable battery NH-9WM (N)
Supplied accessories
Battery charger (1)
Rechargeable battery (1)
Rechargeable battery carrying case (1)
Headphones with a remote control (1)
Dry battery case (1)
Handstrap (1)
Carrying pouch (1)
LR6 (size AA) alkaline battery (1) (Tourist model only)
Design and specifications are subject to change without notice.
PORTABLE MINIDISC PLAYER
US Model
AEP Model
UK Model
Australian Model
Tourist Model
E Model
NEW
MT-MZE44-140
ODX-1A/1B
Playback
Approx.
5.5 hours
Approx.
8.5 hours
Approx.
16 hours
5
/
in) not including projecting parts and controls
8
MZ-E44
MZ-E44/E45
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Table of Contents
Related Manuals for Sony MD Walkman MZ-E45
Summarization of Contents
Specifications
MD Section Specifications
Technical specifications for the MD playback system, laser, and audio output.
General Specifications
General specifications including power requirements, battery life, dimensions, and mass.
Servicing Note
Servicing Notes and Safety Precautions
Critical notes for servicing, including laser product warnings and repair precautions.
General
Location and Function of Controls
Details the controls on the main unit and headphone remote for operation.
Disassembly
Upper Panel Assembly Disassembly
Step-by-step guide to disassembling the upper panel assembly.
Bottom Panel Assembly Disassembly
Step-by-step guide to disassembling the bottom panel assembly.
Main Board Access and Removal
Instructions for removing and accessing the main board.
Disassembly (Continued)
Belt and Front Panel Assembly Disassembly
Steps for disassembling the belt and front panel components.
Mechanism Deck Section Disassembly
Detailed procedure for disassembling the mechanism deck.
Disassembly (Continued)
Optical Pick-Up Block Assembly Disassembly
Guide for disassembling the optical pick-up block, including sheet replacement.
Test Mode
Setting the Test Mode
Two methods for entering test mode: key input or shorting a test point.
Test Mode Configuration Overview
Overview of test mode structure, including overall and servo adjustments.
Servo Mode Operation and Adjustment
How to operate and adjust settings within the servo mode.
Test Mode (Continued)
Detailed Description of Test Modes
Detailed descriptions of various adjustment modes like offset, power, MO, and CD.
Test Mode (Continued)
Sled Movement and NV Relation Modes
Covers sled movement and NV relation modes within test mode.
Automatic and Audio Test Modes
Instructions for automatic adjustment and audio testing modes.
Electrical Adjustments
Adjustment Notes and Methods
Important notes and general methods for performing CD and MO adjustments.
CD Automatic Adjustment Procedure
Sequence and items for automatic adjustment in CD mode.
Electrical Adjustments (Continued)
MO Automatic Adjustment Procedure
Sequence and items for automatic adjustment in MO mode.
Electrical Adjustments (Continued)
OFF-track Threshold Adjustment
Procedure for adjusting the OFF-track threshold, especially for MO.
Servo Mode Adjustment Method
How to perform adjustments when in servo mode.
Diagrams
IC Terminal Explanations
Detailed pinout and function descriptions for IC801 (System Control).
Diagrams (Continued)
Block Diagram
Overall system block diagram showing functional unit interconnections.
Diagrams (Continued)
Printed Wiring Boards
Lists semiconductor component locations on the printed wiring boards.
Diagrams (Continued)
Schematic Diagram
Detailed circuit schematic diagrams for the device.
Exploded Views
Panel Section Exploded View
Visual breakdown of the panel section components for service.
Exploded Views (Continued)
Main Section Exploded View
Visual breakdown of the main section components for service.
Exploded Views (Continued)
Mechanism Deck Section Exploded View
Visual breakdown of the mechanism deck components for service.
Electrical Parts List
Main Electrical Parts List
Comprehensive list of main electrical parts like capacitors and resistors.
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