DOWNLOAD Sony HCD-GTX66 / HCD-GTX77 / HCD-GTX77BP / MHC-GTX66 / MHC-GTX77 / MHC-GTX77BP Service Manual ↓ Size: 6.28 MB | Pages: 100 in PDF or view online for FREE

1

Model Name Using Similar Mechanism

HCD-GTX88

CD

CD Mechanism Type

CDM74KF-K6BD91UR-WOD

Section

Optical Pick-up Name

KSM-213DCP/C2NP

Tape Deck

Model Name Using Similar Machanism

HCD-GTX88

Section

The following are measured at
Mexican model:

HCD-GTX77BP: AC 127 V, 60 Hz

Other models:

AC 120, 220, 240 V, 50/60 Hz

Front speaker
Power Output (rated):

HCD-GTX77/GTX77BP: 225 W + 225 W
(at 4 

Ω, 1 kHz, 1% THD)

HCD-GTX66: 210 W + 210 W
(at 4 

Ω, 1 kHz, 1% THD)

RMS output power (reference):

HCD-GTX77/GTX77BP: 380 W + 380 W
(per channel at 4 

Ω, 1 kHz,

10% THD)
HCD-GTX66: 340 W + 340 W
(per channel at 4 

Ω, 1 kHz,

10% THD)

Inputs
VIDEO (AUDIO IN) L/R:

Voltage 250 mV,
impedance 47 kilohms

AUDIO (AUDIO IN) L/R:

Voltage 450 mV,
impedance 47 kilohms

MIC:

Sensitivity 1 mV,
impedance 10 kilohms

          (USB) port:

Type A

Outputs
PHONES:

accepts headphones of
8 ohms or more

System

Compact disc and digital
audio system

Laser

Semiconductor laser
(

λ=770 – 810 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

20 Hz – 20 kHz

Wave length

770 – 810 nm

Signal-to-noise ratio

More than 90 dB

Dynamic range

More than 88 dB

Recording system

4-track 2-channel stereo

Frequency response

50 – 13,000 Hz (±3 dB),
using Sony TYPE I tape

2008C04-1

© 2008. 03

– Continued on next page –

• HCD-GTX66/GTX77/GTX77BP are the

tuner,deck, CD and amplifier section in
MHC-GTX66/GTX77/GTX77BP.

E Model

HCD-GTX66/GTX77

Mexican Model

HCD-GTX77BP

Photo: HCD-GTX66

2

0

0

FM stereo, FM/AM superheterodyne tuner

Tuning range

87.5 – 108.0 MHz
(50 kHz step)

Antenna

FM lead antenna

Antenna terminals

75 ohm unbalanced

Intermediate frequency 10.7 MHz

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 – 1,610 kHz (with the
interval set at 10 kHz)

Antenna

AM loop antenna

Antenna terminals

External antenna terminal

Intermediate frequency 450 kHz

Supported bit rate

MP3 (MPEG 1 Audio Layer 3):
32 – 320 kbps, VBR

Sampling frequencies

MP3 (MPEG 1 Audio Layer 3):
32/44.1/48 kHz

Transfer speed

Full-Speed

Supported USB device

Mass Storage Class

Maximum current

500 mA

Power requirements
Mexican model:

127 V AC, 60 Hz

Argentina model:

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

300 W

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

281 

×

 361 

×

 417 mm

Mass (Approx.)

12.4 kg

3

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

The laser diode in the optical pick-up block may suffer electrostatic
breakdown because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.

• 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.

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 viscou-s (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.

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

The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick-
up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.

Laser component in this product is capable
of emitting radiation exceeding the limit for
Class 1.

4

– MODEL NUMBER LABEL –

GTX66

AR

3-198-001-2

s

E2

3-113-126-2

s

E51

3-198-009-2

s

GTX77

AR

3-198-001-1

s

E2

3-113-126-1

s

E51

3-198-009-1

s

GTX77BP

MX

3-113-127-1

s

• Abbreviation

AR

: Argentina model

E2

: 120V AC area in E model

E51 : Chilean and Peruvian model
MX

: Mexican Model

PART No.