Sony HCD-GX250 - User Manual

HCD-GX250
US Model
Canadian Model
SERVICE MANUAL
MINI HI-FI COMPONENT SYSTEM
Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation
9-877-537-01
2004C1678-1
© 2004.03
• HCD-GX250 is the tuner, deck, CD and
amplifier section in MHC-GX250.
SPECIFICATIONS
Ver 1.0 2004.03
Model Name Using Similar Mechanism New
CD
CD Mechanism Type CDM74-K6BD80
Section
Optical Pick-up Name KSM-213DCP/Z-NP
Tape deck Model Name Using Similar Mechanism New
Section Tape Transport Mechanism Type CWM43FF-05
Amplifier section
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC
DISTORTION:
With 6 ohm loads, both channels driven, from
120 – 10,000 Hz: rated 140 watts per channel
minimum RMS power, with no more than 10%
total harmonic distortion from 250 milliwatts to
rated output.
Continuous RMS power output (reference):
140 + 140 watts (6 ohms at
1 kHz, 10% THD)
Total harmonic distortion less than 0.07% (6 ohms at
1kHz, 70 W)
CD player section
System Compact disc and digital
audio system
Laser Semiconductor laser
(λ=780 nm)
Emission duration:
continuous
Frequency response 2 Hz – 20 kHz (±0.5 dB)
Wavelength 780 – 790 nm
Signal-to-noise ratio More than 90 dB
Dynamic range More than 90 dB
Tape deck section
Recording system 4-track 2-channel, stereo
Frequency response 50 – 13,000 Hz (±3 dB),
using Sony TYPE I
cassettes
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range 87.5 – 108.0 MHz
(100-kHz step)
Antenna FM lead antenna
Antenna terminals 75 ohms unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range 530 – 1,710 kHz
(with the tuning interval
set at 10 kHz)
531 – 1,710 kHz
(with the tuning interval
set at 9 kHz)
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz
General
Power requirements 120 V AC, 60 Hz
Power consumption
USA models: 205 watts
Canadian models: 260 VA
Dimensions (w/h/d) incl. projecting parts and
controls Amplifier/Tuner/Tape/CD section:
Approx. 280 × 327 ×
425 mm
ss Ma Approx. 10.0 kg
Design and specifications are subject to change
without notice.
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TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

Summary

SPECIFICATIONS

Amplifier Section Specifications

General Specifications

SAFETY CHECK-OUT

AC LEAKAGE Measurement

AC leakage measurement limits and methods for ensuring user safety.

SERVICING NOTE

Service Position -1 (AMP BOARD)

DISASSEMBLY Procedures

3-3. FRONT PANEL SECTION Disassembly

Step-by-step guide for disassembling the front panel assembly.

3-4. CD MECHANISM DECK Disassembly

Procedure for removing the CD mechanism deck unit.

3-9. MAIN BOARD Removal

Instructions for removing the main electronic board.

3-14. OPTICAL PICK-UP Removal

Steps for safely removing the optical pick-up assembly.

TEST MODE Operations

Cold Reset Procedure

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

Aging Mode Procedure

PANEL Test Mode Functions

CD Ship Mode (LOCK) Function

Method to secure the CD pick-up for transport protection.

DIAGRAMS

Schematic Diagram - BD80 A Section

Printed Wiring Board - MAIN Section

Schematic Diagram - MAIN Section (2;2)

IC Pin Function Description

Comprehensive list of pin functions for key integrated circuits.

EXPLODED VIEWS

MAIN SECTION Exploded View

CD MECHANISM DECK SECTION -1 Exploded View

Sony HCD-GX250 Specifications

General

CD Player	Yes
Tuner	FM/AM
Bluetooth	No
USB Playback	No
Cassette Deck	Yes
Remote Control	Yes
Weight	6.5 kg
Type	Mini System
Audio Channels	2
Speakers	2