Sony HCD-GX450 Service Manual

SERVICE MANUAL
Sony Corporation
Personal Audio Group
Published by Sony Engineering Corporation
HCD-GX450
US Model
Canadian Model
MINI HI-FI COMPONENT SYSTEM
9-877-534-03
2005H16-1
© 2005.08
• HCD-GX450 is the tuner, deck, CD and
amplifier section in MHC-GX450.
SPECIFICATIONS
Ver. 1.2 2005.08
Amplifier section
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC
DISTORTION:
With 6 ohm loads, both channels driven, from
120 – 10,000 Hz: rated 125 watts per channel
minimum RMS power, with no more than 10%
total harmonic distortion from 250 milliwatts to
rated output.
Front speaker
Continuous RMS power output (reference):
125 + 125 watts (6 ohms at
1 kHz, 10% THD)
Total harmonic distortion less than 0.07% (6 ohms at
1kHz, 60 W)
Sub woofer
Continuous RMS power output (reference):
150 watts (6 ohms at
50 Hz, 10% THD)
Total harmonic distortion less than 0.07% (6 ohms at
50 Hz, 75 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: 265 watts
Canadian models: 330 VA
Dimensions (w/h/d) incl. projecting parts and controls
Amplifier/Tuner/Tape/CD section:
Approx. 280 × 327 ×
425 mm
Mass Approx. 10.0 kg
Design and specifications are subject to change
without notice.
Former Type Models New Type Models
Model Name Using Similar Mechanism New New
CD
CD Mechanism Type CDM74-F1BD81 CDM74KF-K6BD81C
Section
Optical Pick-up Name KSM-215DCP/C2NP KSM-213DCP/C2NP
Tape deck Model Name Using Similar Mechanism New New
Section Tape Transport Mechanism Type CWM43FF-05 CWM43FF-05

Sony HCD-GX450 Specifications

General

Type	Stereo System
CD Player	Yes
FM Tuner	Yes
AM Tuner	Yes
USB Port	No
Cassette Deck	Yes
Speaker Type	2-way speakers

Summary

SPECIFICATIONS

AUDIO POWER, CD, TAPE, TUNER, AND GENERAL SPECS

Details audio power, CD/tape/tuner characteristics, and general unit information.

SAFETY PROCEDURES

AC LEAKAGE TESTING AND SAFETY CHECKOUT

Methods for AC leakage testing and overall safety checkout.

COMPONENT HANDLING AND REPAIR GUIDELINES

OPTICAL PICK-UP, LASER SAFETY, AND COMPONENT REPAIR

Notes on handling optical pick-up, laser safety, and component repair.

SERVICING NOTES

SERVICE POSITION -1 (AMP BOARD)

Instructions for positioning the unit to access the AMP board.

SERVICE POSITIONS

SERVICE POSITION -2 (BD81A BOARD)

Instructions for positioning the unit to inspect the BD81A board.

DISASSEMBLY OVERVIEW

DISASSEMBLY FLOWCHART

Chart showing the sequence for disassembling the unit.

OPTICAL PICK-UP & SENSOR BOARD DISASSEMBLY

OPTICAL PICK-UP REMOVAL

Procedure for removing the optical pick-up assembly.

SENSOR BOARD REMOVAL

SCHEMATIC DIAGRAMS

BD81A SECTION SCHEMATIC DIAGRAM

Detailed schematic for BD81A board.

MAIN SECTION SCHEMATICS

MAIN SECTION SCHEMATIC DIAGRAM (1/2)

First part of the main section schematic.

AMP POWER SECTION DIAGRAMS

AMP POWER SECTION SCHEMATIC DIAGRAM

Schematic for amp power section.

IC PIN FUNCTION DESCRIPTIONS

IC101 CXD3059AR PIN FUNCTIONS

Pin functions for IC101.