Sony HCD-EA20 User Manual

HCD-EA20
AEP Model
UK Model
SERVICE MANUAL
CD/DVD RECEIVER
Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation
9-961-254-01
2003J1678-1
© 2003.10
HCD-EA20 is the amplifier, DVD/CD
and tuner section in DAV-EA20.
Ver 1.0 2003. 10
SPECIFICATIONS
Amplifier section
Stereo mode (rated) 25 W + 25 W (6 ohms at 1
kHz, THD 10 %)
Surround mode (reference)Front: 25 W + 25 W
Center*: 25 W
Surround*: 25 W + 25 W
(6 ohms at 1 kHz, THD
10 %)
Subwoofer*: 50 W
(8 ohms at 100 Hz, THD
10 %)
*Depending on the sound field settings and the source,
there may be no sound output.
Inputs VIDEO:
Sensitivity: 150 mV
Impedance: 50 kilohms
SAT:
Sensitivity: 300 mV
Impedance: 50 kilohms
AUDIO IN:
sensitivity: 150 mV
Impedance: 50 kilohms
Outputs VIDEO (AUDIO OUT):
Voltage: 1 V
Impedance: 1 kilohm
Phones Accepts low-and high-
impedance headphones.
DVD system
Laser Semiconductor laser
(DVD: λ = 650 nm)
(CD: λ = 780 nm)
Emission duration:
continuous
Signal format system NTSC or NTSC/PAL
Frequency response (at 2CH STEREO mode)
DVD (PCM): 2 Hz to 22
kHz (±1.0 dB)
CD: 2 Hz to 20 kHz (±1.0
dB)
Harmonic distortion Less than 0.03 %
Tuner section
System PLL quartz-locked digital
synthesizer system
FM tuner section
Tuning range 87.5 – 108.0 MHz (50 kHz
step)
Aerial FM wire aerial
Aerial terminals 75 ohms, unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range 531 – 1,602 kHz (with the
interval set at 9 kHz)
Aerial AM loop aerial
Intermediate frequency 450 kHz
Video section
Inputs Video: 1 Vp-p 75 ohms
Outputs Video: 1 Vp-p 75 ohms
General
Power requirements 230 V AC, 50/60 Hz
Power consumption 130 W (230 V AC)
0.3 W (230 V AC) (at the
Power Saving Mode)
Dimensions (approx.) 355 × 80 × 395 mm (w/h/d)
incl. projecting parts
Mass (approx.) 6.4 kg
Operating temperature 5°C to 35°C
Operating humidity 5 % to 90 %
Design and specifications are subject to change
without notice.
Model Name Using Similar Mechanism HCD-SA30
Mechanism Type CDM77A-DVBU20
Optical Pick-up Name TDP022W
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TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

Sony HCD-EA20 Specifications

General

Channels	2.0
Tuner	FM/AM
Frequency Response	20 Hz - 20 kHz
Signal-to-Noise Ratio	80 dB
Weight	5.5 kg
CD Player Type	Single Disc
Power Output	100W (50W x 2)
Functions	CD, Cassette, Radio
Inputs	Audio in
Outputs	Headphones
Cassette Deck	Single
Type	Mini Hi-Fi System

Summary

Specifications

Amplifier Section Specifications

Details power output and impedance for stereo and surround modes.

DVD System Specifications

Disassembly Procedures

3-7. Amplifier Board and Sub Transformer Board Disassembly

3-8. DVD Mechanism Disassembly

Procedure for removing the DVD mechanism unit, including screws and wire connections.

3-12. Optical Pick-Up Disassembly

Procedure for removing the optical pick-up unit, including flexible board and screws.

Electrical Adjustments

Auto Servo Adjustment

Details the necessity and process for re-adjusting servo circuits after component replacement.

Diagrams and Schematics

6-2. Block Diagrams – RF/Servo Section –

Block diagram illustrating the signal flow and interconnections within the RF and servo sections.

6-3. Printed Wiring Board – RF Section –

6-4. Schematic Diagram – RF Section –

Schematic diagram detailing the electronic circuit for the RF section.

6-7. Printed Wiring Board – DMB Section (Side A) –

6-8. Printed Wiring Board – DMB Section (Side B) –

6-9. Schematic Diagram – DMB Section (1/8) –

Schematic diagram detailing a portion of the DMB section's electronic circuit.

6-28. IC Pin Function Description

Detailed pinout and function descriptions for various integrated circuits used in the service manual.

Exploded Views

7-2. Front Panel Section Exploded View

7-3. Chassis Section Exploded View

7-4. DVD Mechanism Section Exploded View

Exploded view of the DVD mechanism unit, showing its components and assembly.

Electrical Parts List

Amplifier (AMP) Board Parts

List of electrical components (capacitors, resistors, ICs, etc.) for the Amplifier section.

DMB03 Board Parts

List of electrical components for the DMB03 board.

UCOM Board Parts