Sony HCD-EC68 Service Manual

SERVICE MANUAL
Sony Corporation
Audio Business Group
Published by Sony Techno Create Corporation
section
HCD-EC78
European and Russian models:
Power output (rated):
Low channel
55 W + 55 W (at 8 Ω, 1 kHz, 1% THD)
High channel
55 W + 55 W (at 8 Ω, 8 kHz, 1% THD)
RMS output power (reference):
Low channel
75 W + 75 W (per channel at 8 Ω, 1 kHz, 10% THD)
High channel
75 W + 75 W (per channel at 8 Ω, 8 kHz, 10% THD)
Other models:
Power output (rated):
Low channel
50 W + 50 W (at 8 Ω, 1 kHz, 1% THD)
High channel
50 W + 50 W (at 8 Ω, 8 kHz, 1% THD)
RMS output power (reference):
Low channel
70 W + 70 W (per channel at 8 Ω, 1 kHz, 10% THD)
High channel
70 W + 70 W (per channel at 8 Ω, 8 kHz, 10% THD)
HCD-EC68
European and Russian models (except for the UK model):
Power output (rated):
50 W + 50 W (at 6 Ω, 1 kHz, 1% THD)
RMS output power (reference):
70 W + 70 W (per channel at 6 Ω, 1 kHz, 10% THD)
Power output (rated):
55 W + 55 W (at 6 Ω, 1 kHz, 1% THD)
RMS output power (reference):
75 W + 75 W (per channel at 6 Ω, 1 kHz, 10% THD)
Other models:
Power output (rated):
50 W + 50 W (at 6 Ω, 1 kHz, 1% THD)
RMS output power (reference):
70 W + 70 W (per channel at 6 Ω, 1 kHz, 10% THD)
Inputs
AUDIO IN (stereo mini jack): Sensitivity 800 mV, impedance
22 kilohms
Outputs
PHONES (stereo mini jack): Accepts headphones with an
impedance of 8 Ω or more
SPEAKER: impedance
HCD-EC78: 8 Ω
HCD-EC68: 6 Ω
CD player section
System: Compact disc and digital audio system
Laser: Semiconductor laser (λ=770 – 810 nm)
Emission duration: continuous
Frequency response: 20 Hz – 20 kHz
Signal-to-noise ratio: More than 90 dB
Dynamic range: More than 88 dB
Tape deck section (except for the UK model)
Recording system: 4-track 2-channel, stereo
Tuner section
FM stereo, FM/AM superheterodyne tuner
Antenna:
FM lead antenna
AM loop antenna
FM tuner section:
Tuning range:
87.5 – 108.0 MHz (50 kHz step)
Intermediate frequency: 10.7 MHz
AM tuner section:
Tuning range
Australian, Pan-American models:
530 – 1,710 kHz (with 10 kHz tuning interval)
531 – 1,710 kHz (with 9 kHz tuning interval)
European and Russian models:
531 – 1,602 kHz (with 9 kHz tuning interval)
Other models:
530 – 1,610 kHz (with 10 kHz tuning interval)
531 – 1,602 kHz (with 9 kHz tuning interval)
Intermediate frequency: 450 kHz
HCD-EC68/EC78
SPECIFICATIONS
EXCEPT HCD-EC68: UK MODEL
COMPACT DISC DECK RECEIVER
HCD-EC68: UK MODEL
COMPACT DISC RECEIVER
9-889-007-01
2008B05-1
©
2008.02
AEP Model
E Model
HCD-EC68/EC78
UK Model
Australian Model
HCD-EC68
Ver. 1.0 2008.02
• HCD-EC68 is the amplifi er, CD player, tape
deck (except UK model) and tuner section in
MHC-EC68.
• HCD-EC78 is the amplifi er, CD player, tape
deck and tuner section in MHC-EC78.
Photo : HCD-EC78
CD
Section
Model Name Using Similar Mechanism
NEW
Mechanism Type
CDM88A-K6BD90-WOD
Optical Pick-up Block Name
KSM-213DCP
Tape deck
Section
(EXCEPT EC68: UK)
Model Name Using Similar Mechanism
HCD-EC77
Tape Transport Mechanism Type
TCM-J1 or
CS-21SC-900TP
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TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

Sony HCD-EC68 Specifications

General

Type	Mini Hi-Fi System
CD Player	Yes
CD Changer	No
Tuner Bands	FM/AM
USB Playback	Yes
Remote Control	Yes
Speakers	2
Weight (Main Unit)	3.5 kg
Bluetooth	No
Speaker Size	10 cm
Weight (Speaker)	2.5 kg

Summary

Service Manual Overview and Specifications

General System Specifications

Technical specifications for the HCD-EC68/EC78 audio system.

Amplifier Power Output

Details on power output ratings for various models and regions.

CD Player and Tuner Specifications

Specifications for the CD player and tuner sections.

Tape Deck Specifications

Details for the tape deck recording system.

Servicing, Disassembly, and Test Modes

Servicing Notes and Precautions

Important notes and precautions for servicing the unit.

Unit Disassembly Procedures

Detailed steps and flow for disassembling the unit.

Test Modes Overview

Various test modes for checking unit functions and performance.

Component Handling and Precautions

Optical Pickup and Laser Diode Handling

Precautions for handling the optical pickup block and laser diode safely.

Unleaded Solder Information

Information and characteristics of unleaded solder.

Disc Tray Lock Release

Procedure to release the disc tray lock mechanism.

Unit Maintenance Procedures

Opening the Disc Tray (Power Off)

Procedure to open the CD tray when the unit is off.

Removing the Volume Knob

Procedure for removing the volume knob.

Safety and Component Identification

Capacitor Discharge for Safety

Procedure to discharge capacitors on the main board for safety.

Tape Mechanism Deck Identification

Guide to differentiate between two types of tape mechanism decks.

Basic Unit Operations

Source Selection, Sound, and Playback

How to select sources, adjust sound, and play CDs/MP3s.

Initial Setup and Clock Setting

Initial setup instructions, including remote and clock settings.

Radio and Tape Playback

Guides for listening to radio and playing cassette tapes.

Display Information

How to change the information displayed on the system.

Advanced Operations and Timers

CD Programming and Tape Recording

How to create custom CD playback and record audio to tape.

Timer Functions

Explanation of the Sleep Timer and Play Timer functions.

Radio Station Presets

How to store and recall favorite radio stations.

Adjustments and Diagrams

Mechanical Adjustments

Procedures for adjusting mechanical parts like torque and tension.

Electrical Adjustments

Procedures for adjusting electrical components and heads.

Tuner Section Adjustments

Procedures for adjusting the tuner section's frequency and tracking.

Circuit Diagrams and Component Information

Diagram Interpretation Notes

Notes on interpreting printed wiring board and schematic diagrams.

Circuit Diagrams and Layouts

Circuit diagrams and printed wiring board layouts for all sections.

Integrated Circuit (IC) Details

IC Block Diagrams

Block diagrams illustrating the function of key ICs.

IC Pin Function Descriptions

CD Board IC Pin Descriptions

Detailed pin functions for ICs on the CD board.

Panel Board IC Pin Descriptions

Panel Board IC301 Pinout

Pin description for IC301 on the Panel Board.

Other IC Pin Descriptions

IC601 Pin Description

Pin description for IC601.

Component Identification and Assembly

Exploded Views of Unit Sections

Visual breakdown of unit parts for identification and replacement.

Panel Section Exploded View

Exploded view of the panel section and its components.

Tape Deck Section Exploded View

Exploded view of the tape deck section.

Front Panel Section Exploded View

Exploded view of the front panel section.

Chassis and Main Section Exploded Views

Exploded views of the chassis and main sections.

CD Mechanism Section Exploded View

Exploded view of the CD mechanism section.

Electrical Parts List

Component Lists

Lists of capacitors, resistors, semiconductors, connectors, and ICs.