HCD-GNX700, HCD-GNX800, MHC-GNX700, MHC-GNX800 - Sony Audio Service Manual (repair manual). Page 2

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• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be

 damaged by heat.

• Keep the temperature of soldering iron around 270˚C

during repairing.

• Do not touch the soldering iron on the same conductor of the

 circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering

 or unsoldering.

CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.

This appliance is classified as
a CLASS 1 LASER product.
This label is located on the rear
exterior.

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH
MARK 0 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.

Unleaded solder
Boards requiring use of unleaded solder are printed with the lead
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size.)

Unleaded solder has the following characteristics.

• Unleaded solder melts at a temperature about 40

°C higher than

ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350

°C.

Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!

• Strong viscosity

Unleaded solder is more viscous (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.

• Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.

Disc player section
System

Compact disc and digital
audio system

Laser

Semiconductor laser
(

λ=780 nm)

Emission duration: continuous

Laser Output

Max. 44.6 

µW*

* This output is the value measured at
   a distance of 200 mm from the
   objective lens surface on the Optical
   Pick-up Block with 7 mm aperture.

Frequency response

2 Hz – 20 kHz (

±0.5 dB)

Wave length

780 – 790 nm

Signal-to-noise ratio

More than 90 dB

Dynamic range

More than 90 dB

OPTICAL CD DIGITAL OUT
(Square optical connector jack, rear panel)
Wave length

660 nm

Output Level

–18 dBm

Tape deck section
Recording system

4-track 2-channel stereo

Frequency response

50 – 13,000 Hz (

±3 dB),

using Sony TYPE I tape

Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range

87.5 – 108.0 MHz

Antenna

FM lead antenna

Antenna terminals

75 ohm unbalanced

Intermediate frequency

10.7 MHz

AM tuner section
Tuning range
Latin American models:

530 – 1,710 kHz
(with the interval set at 10 kHz)
531 – 1,710 kHz
(with the interval set at 9 kHz)

Other models:

531 – 1,602 kHz
(with the interval set at 9 kHz)
530 – 1,710 kHz
(with the interval set at 10 kHz)

Antenna

AM loop antenna

Antenna terminals

External antenna terminal

Intermediate frequency

450 kHz

General
Power requirements
Australian model:

230 – 240 V AC, 50/60 Hz

Argentina models:

220 V AC, 50/60 Hz

Other models:

120 V, 220 V or 230 – 240 V AC, 50/
60 Hz
Adjustable with voltage selector

Power consumption
MHC-GNX800

350 watts

MHC-GNX700

290 watts

Dimensions (w/h/d) (Approx.)

281 

× 362 × 404.5 mm

Mass (Approx.)
HCD-GNX800

14.3 kg

HCD-GNX700

14.0 kg

Design and specifications are subject to change without notice.