Sony HCD-EC78 - User 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

Summary

SERVICING NOTES

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT

Precautions for handling the optical pick-up block due to electrostatic discharge.

GENERAL

Other Operations

Creating your own CD program (Program Play)

How to create custom playback sequences for CD tracks or MP3 files.

DISASSEMBLY

3-1. DISASSEMBLY FLOW

A flowchart outlining the sequence for disassembling the set.

3-2. SIDE PANEL (L);(R)

3-5. MAIN BOARD

3-8. CD MECHANISM BLOCK

TEST MODE

COLD RESET

Procedure to reset the unit to factory default settings, clearing all stored data.

PANEL TEST MODE

CD SERVO TEST MODE

How to Enter the CD Servo Test Mode

Step-by-step guide to access the CD servo test mode.

CD SERVICE MODE

CD ERROR CODE

How to display and interpret CDM Errors and BD Errors from the CD mechanism.

CD FACTORY MODE

Procedure

Steps to enter the CD Factory Mode, which includes various settings like RF gain and tracking servo.

MECHANICAL ADJUSTMENTS

Torque Measurement

Method and values for measuring torque on various tape deck components.

ELECTRICAL ADJUSTMENTS

RECORD;PLAYBACK HEAD AZIMUTH ADJUSTMENT

Procedure for adjusting the head azimuth for optimal recording and playback.

CD SECTION

FOCUS BIAS CHECK

Procedure and expected waveform for checking optical pick-up focus bias.

TUNER SECTION

AM FREQUENCY COVERAGE ADJUSTMENT

Adjusting the AM tuner to cover the specified frequency range.

FM FREQUENCY COVERAGE ADJUSTMENT

Adjusting the FM tuner to cover the specified frequency range.

[FM DETECTOR ADJUSTMENT]

Procedure for adjusting the FM detector for optimal performance.

SECTION 7 DIAGRAMS

7-1. PRINTED WIRING BOARD - CD Board -

7-2. SCHEMATIC DIAGRAM - CD Board -

7-3. PRINTED WIRING BOARD - DECK Board (Except EC68: UK model) -

7-4. SCHEMATIC DIAGRAM - DECK Board (Except EC68: UK model) -

7-5. PRINTED WIRING BOARD - MAIN Board -

7-6. SCHEMATIC DIAGRAM - MAIN Board (1;2) -

7-7. SCHEMATIC DIAGRAM - MAIN Board (2;2) -

7-8. PRINTED WIRING BOARD - HI AMP Board (EC78) -

7-9. SCHEMATIC DIAGRAM - HI AMP Board (EC78) -

7-10. PRINTED WIRING BOARD - LOW AMP Board -

7-11. SCHEMATIC DIAGRAM - LOW AMP Board -

7-12. PRINTED WIRING BOARD - PANEL Board (Suffix-12) -

7-13. PRINTED WIRING BOARD - PANEL Board (Suffix-13) -

7-14. SCHEMATIC DIAGRAM - PANEL Board -

7-15. PRINTED WIRING BOARDS - KEY Section -

7-16. SCHEMATIC DIAGRAM - KEY Section -

7-17. PRINTED WIRING BOARD - PT Board -

7-18. SCHEMATIC DIAGRAM - PT Board -

IC Pin Function Description CD BOARD IC101 TC94 A70 FG-006

PANEL BOARD IC301 MB90803 PF-G-135 E1 (SYSTEM CONTROLLER)

EXPLODED VIEWS

8-1. PANEL SECTION

ELECTRICAL PARTS LIST

Sony HCD-EC78 Specifications

General

Brand	Sony
Model	HCD-EC78
Category	Stereo System
Language	English