Sony HCD-W55 User Manual

MICROFILM
SERVICE MANUAL
Dolby noise reduction manufactured under license from
Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol a are trademarks of
Dolby Laboratories Licensing Corporation.
r
HCD-W55 is the deck, CD section
in MHC-W55/W77AV.
AEP Model
UK Model
Model Name Using Similar Mechanism NEW
CD Mechanism Type CDM38-5BD19
Base Unit Name BU-5BD19
Model Name Using Similar Mechanism HCD-H901AV
Tape Transport Mechanism Type TCM-220WR2
Tape deck
Section
CD
Section
SPECIFICATIONS
Tape player section
Recording system
4-track 2-channel stereo
Frequency response
(DOLBY NR OFF)
40–13,000 Hz (±3 dB),
using Sony TYPE I cassette
40–14,000 Hz (±3 dB),
using Sony TYPE II cassette
40–15,000 Hz (±3 dB),
using Sony TYPE IV cassette
Wow and flutter
0.1% WRMS ±0.3% (DIN)
Design and specifications are subject to change without notice.
HCD-W55
CD player section
System Compact disc digital
audio system
Laser Semiconductor laser
(λ =780nm)
Emission
duration : continuous
Laser output
Max 44.6µW*
*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.
Wavelength
780–790 nm
Frequency response
2Hz–20kHz (±0.5 dB)
Signal-to-noise ratio
More than 80 dB
Dynamic range
More than 90 dB
CD OPTICAL DIGITAL OUT
(Square optical connector jack, rear panel)
Wavelength 600 nm
Output Level –18 dBm
MINI Hi-Fi COMPONENT SYSTEM

Sony HCD-W55 Specifications

General

Brand	Sony
Model	HCD-W55
Category	Stereo System
Language	English

Summary

Specifications

CD Player Section Specifications

Technical specifications for the CD player functionality, including frequency response and signal-to-noise ratio.

Tape Player Section Specifications

Technical specifications for the tape player functionality, including frequency response and wow and flutter.

Disassembly Procedures

Front Panel Section Removal

Procedure for detaching the front panel assembly from the main unit.

CD Block Removal

Steps to remove the CD mechanism from the chassis assembly.

Cassette Lid and Mechanism Deck Removal

Process for removing the cassette lid and tape mechanism deck.

Adjustments

Mechanical Adjustments

Procedures for mechanical adjustments, including torque and tension measurements.

Electrical Adjustments

Procedures for electrical adjustments, including bias, level, and speed settings.

IC Terminal Explanations

Diagrams

Block Diagram

Overall system block diagram showing signal flow and major components.

Circuit Boards Location

Visual guide to the physical location of various circuit boards within the unit.

Printed Wiring Boards - Main Section

Layout of the main printed wiring board (PWB) for the system.

Schematic Diagram - TC Section

Detailed circuit schematic for the tape deck (TC) section.

Printed Wiring Boards - TC Section

Layout of printed wiring boards for the tape deck (TC) section.

Schematic Diagram - CD Section

Detailed circuit schematic for the CD player section.

Printed Wiring Boards - CD Section

Layout of printed wiring boards for the CD player section.

IC Block Diagrams

Internal block diagrams for key integrated circuits (ICs).

Exploded Views

Chassis Section

Exploded view of the main chassis and outer casing components.

Front Panel Section

Exploded view of the front panel assembly and its parts.

TC Mechanism Section - 1

Exploded view of the first part of the tape deck mechanism.

TC Mechanism Section - 2

Exploded view of the second part of the tape deck mechanism.

CD Mechanism Section

Exploded view of the CD player mechanism and its components.

Chassis Section (CDM38-5BD19)

Exploded view of the chassis for the CD mechanism.

Base Unit Section

Exploded view of the base unit assembly, including optical pickup.

Electrical Parts List

Capacitors

List of all capacitors with part numbers and specifications.

Transistors

List of all transistors with part numbers and specifications.

Resistors

List of all resistors with part numbers and specifications.

Connectors

List of all connectors with part numbers and specifications.

Integrated Circuits (IC)

List of all integrated circuits with part numbers and specifications.

Diodes

List of all diodes with part numbers and specifications.

Switches

List of all switches with part numbers and specifications.