Sony hcd gx 25 service manual

Page 1

HOD-6X25

SERVICE MANUAL

Ver 1.0 2003. 03

- HCD-GX25 is the tuner, deck, CD
and amplifier section in MHC-

GX25.

US Model

Amplifier section

Model Name Using Similar Mechanism NEW

Continuous RMS power output (reference)

Total harmonic distortion

Inputs

GAME INPUT AUDIO L/R (phono jacks):

CD
_ CD Mechanism Type CDM74F-KGBD72
Section _ _
Optical Pick-up Name KSM-213DCP
Tape deck Model Name Using Similar Machanism NEW
Section Tape Transport Mechanism Type CWM43FF-O5
SPECIFICATIONS
CD player section
System Compact disc and digital
120+120 watts (6 ohms at audio system
1 kHz. 10% THD) Laser Semlconducmr laser
0:780 nm)
less than 0.07% Emission duration:
(6 ohms at 1 kHz, oowt continuous
Frequency response 2 Hz , 20 kHz (:05 dB)
Wavelength 780 , 790nm
Signalrloenolxe ratto More than 90 dB
voltage 250 mV. Dynamic range More than 90 dB

impedance 47 kilohms

GAME INPUT VIDEO (phone jack):

Outputs

IVprp. 73 ohms

PHONES (stereo tntnt Jack):

accepts headphones of
2 ohms or more

VIDEO OUT (phono jack):

SPEAKER:

9-877-125-01
2003C0400-1
© 2003. 03

max. output leyel l Vprp.
unbalanced, Sync negative.
load trnpedance 75 ohms
accepts impedance of o to
16 ohms

Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation

Tape deck section

Recording system 4rtmck Zrcltannel stereo

Frequency response 50 , [3.000 H1 (:3 dB).
using Sony TYPE 1
cassette

- Continued on next page -

MINI HlFl COMPONENT SYSTEM
S ONY;

Page 2

HCD-GX25

Tuner section

FM stereo. FM/AM superheterodyne tuner

FM tuner section
Tuning rnnpe

Antenna

Antenna terminals
Intermediate frequency

AM tuner section
Tuning range

Antenna

Antenna terminals

Intermediate frequency

General
Power requirements

Power consumption
DimenSlonS (w/h/d)
Mass

Supplied Accessories:

87.5 7108.0 MHZ
FM lead antenna
75 ohm unbalanced
10.7 MHZ

530 r 1.710 kHz (with the tuning
interval set At 10 kHz)

AM loop antenna

External antenna terminal

450 kHz

120 v AC, 60 Hz
120 watts

Approx. 230 x 325 x 407 mm
Approx. 3.5 kg

AM loop antenna (1)

Remote Commander (l )
Batteries (2)

FM lead antenna (1)
Speaker pads (a)

Derlgn (mll waifimlmm m nib/m in change nil/mm

HUN/SE.

SAFETY CHECK-OUT

After correcting the original service problem, perform the following
safety check before releaslng the set to the customer:

Check the antenna terminals, metal trim, metallized knobs screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.

LEAKAGE TEST

The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to oh s, must not exceed 0.5 mA (500 microamperes).
Leakage culrent can be measured by any one of three methods.

l. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers instructions to use these
instruments.

2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.

w

. Measuring the voltage drop across a resistor by means of aVOM
or battery-operated AC voltmeter. The limit indication is 0.75
V, so analog meters must have an accurate low-voltage scale. The
Simpson 250 and Sanwa SH-63Trd are examples of a passive
VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are suitable. (See Fig. A)

To Exposed Metal
Parts on Set

A G
g 15kg vollmeler
(a. 75 V)

? Earth Ground

a. 15m:

Fig. A. Using an AC voltmeter to check AC leakage.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK A 0R DOTTED LINE
WITH MARK A ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.