HCD-GRX7, HCD-GRX7J, HCD-MD500, HCD-R700, HCD-RX707, HCD-RX77, HCD-RX77S, MHC-GRX7, MHC-GRX7J, MHC-R700, MHC-RX77, MHC-RX77S - Sony Audio Service Manual (repair manual)

Canadian Model

HCD-RX77

AEP Model

HCD-R700/RX77/RX77S

UK Model

HCD-R700/RX77S

E Model

HCD-GRX7/GRX7J

Australian Model

HCD-GRX7

Tourist Model

HCD-GRX7J

2002C0500-1

C

 2002.03

HCD-GRX7/GRX7J/R700/RX77/RX77S
are the Amplifier, CD player, Tape Deck
and Tuner section in MHC-GRX7/GRX7J/
R700/RX77/RX77S.

Photo: HCD-RX77

Model Name Using Similar Mechanism

HCD-H991AV

CD Mechanism Type

CDM38L-5BD29AL/

CDM38LH-5BD29AL

Base Unit Type

BU-5BD29AL

Optical Pick-up Type

KSS-213D/Q-NP

Model Name Using Similar Mechanism

NEW

Tape Transport Mechanism Type

TCM-230AWR1/

230PWR1

Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol 

a

  are trade-

marks of Dolby Laboratories Licensing Corporation.

CD
Section

TAPE
DECK
Section

Canadian model:
Continuous RMS power output (reference)

100 + 100 watts
(8 ohms at 1 kHz, 10% THD)

Total harmonic distortion less than 0.07%

(8 ohms at 1 kHz, 55 W)

European and Russian models:
DIN power output (rated)

60 + 60 watts
(6 ohms at 1 kHz, DIN)

Continuous RMS power output (reference)

80 + 80 watts
(6 ohms at 1 kHz, 10% THD)

Music power output (reference)

135 + 135 watts
(6 ohms at 1 kHz, 10% THD)

Other models:
The following measured at AC 110, 220 V 50/60 Hz
DIN power output (rated)

85 + 85watts
(8 ohms at 1 kHz, DIN)

Continuous RMS power output (reference)

110 + 110 watts
(8 ohms at 1 kHz, 10% THD)

The following measured at AC 120, 240 V 50/60 Hz
DIN power output (rated)

105 + 105 watts
(8 ohms at 1 kHz, DIN)

Continuous RMS power output (reference)

130 + 130 watts
(8 ohms at 1 kHz, 10% THD)

Peak music power output (reference)

1500 watts

– Continued on next page –

– 2 –

Inputs
MD/VIDEO IN:

voltage 450 mV/250mV,

(phono jacks)

impedance 47 kilohms

MIX MIC: (phone jack)

sensitivity 1 mV, impedance 10
kilohms

Outputs
MD/VIDEO OUT:

voltage 250 mV,

(phono jacks)

impedance 1 kilohms

PHONES:

accepts headphones of 8 ohms

(stereo phone jack)

or more

SPEAKER:
European and Russian models:

accepts impedance of 6 to 16 ohms

Other models:

accepts impedance of 8 to 16 ohms

SURROUND SPEAKER (Canadian model):

accepts impedance of 16 ohms

SUPER WOOFER (GRX7/GRX7J/RX77: Canadian models):

Voltage 1 V, impedance 1 kilohm

System

Compact disc and digital audio system

Laser

Semiconductor laser (

λ

=780nm)

Emission duration: continuous

Laser output

Max. 44.6 

µ

W*

*This output is the value measured at
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)

Wavelength

780 -790 nm

Signal-to-noise ratio

More than 90 dB

Dynamic range

More than 90 dB

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

600 nm

Output Level

-18 dBm

Recording system

4-track 2-channel stereo

Frequency response

40 - 13,000 Hz (±3 dB),

(DOLBY NR OFF)

using Sony TYPE I cassette
40 - 14,000 Hz (±3 dB),
using Sony TYPE II cassette

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

UKV tuner section (4 band models only)

Tuning range

65.0 - 74.0 MHz
Stereo Plus

AM tuner section

Tuning range
2 Band type:
Canadian model:

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

Other model:

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

3 Band/4 Band type:
European and Russian models:
MW:

531 - 1,602 kHz
(with the interval set at 9 kHz)

LW:

153 - 279 kHz
(with the interval set at 3 kHz)

Middle Eastern models:
MW:

531 - 1,602 kHz
(with the interval set at 9 kHz)

SW:

5.95 - 17.90 MHz
(with the interval set at 5 kHz)

Other models:
MW:

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

SW:

5.95 - 17.90 MHz
(with the interval set at 5 kHz)

Antenna

AM loop antenna

Antenna terminals

External antenna terminal

Intermediate frequency

450 kHz

Power requirements
Canadian model:

120 V AC, 60 Hz

European and Russian models:

230 V AC, 50/60 Hz

Mexican model:

120 V AC, 50/60 Hz

Australian and Israel models:

220 - 240 V AC, 50/60 Hz

Thai model:

220 - 240 V AC, 50/60 Hz

Other models:

110 - 120 V or 220 - 240 V AC,
50/60 Hz

Power consumption
Canadian model:

195 watts

European and Russian models:

140 watts

Other models:

250 watts

Dimensions (w/h/d)

Approx. 280 

×

 335 

×

 380 mm

(11

1

/

8 

×

 13

1

/

8

 

× 

15 in.)

Mass
Canadian model:

Approx. 9.5 kg (20 lbs. 15 oz.)

European and Russian models:

Approx. 9.1 kg (20 lbs. 1 oz.)

Other models:

Approx. 10.2 kg (22 lbs. 8 oz.)

Supplied accessories:

AM loop antenna (1)
Remote RM-SR5 (1)
Batteries (2)
FM lead antenna (1)
Speaker cords (2)
Front speaker pads (8)

Design and specifications are subject to change without notice.

– 3 –

............................................... 3

Location of Controls ....................................................... 6
Setting the Time .............................................................. 7

......................................................... 8

.............................................................. 11

....................... 13

DECK Section ................................................................. 13
TUNER Section .............................................................. 16
CD Section ...................................................................... 18

................................................................. 20

7-1. Block Diagram – TUNER Section

(AEP, UK, German models only) – ................................ 21

7-2. Block Diagram – TUNER Section

(East European, CIS models only) – .............................. 23

7-3. Block Diagram

– CD MECHANISM DECK Section – .......................... 25

7-4. Block Diagram – TAPE DECK Section – ...................... 27
7-5. Block Diagram – MAIN Section – ................................. 29
7-6. Block Diagram – DISPLAY/KEY CONTROL/

POWER SUPPLY Section –  ......................................... 31

7-7. Schematic Diagram  – TUNER Section

(AEP, UK, German models only) – ................................ 35

7-8. Printed Wiring Board – TUNER Section

(AEP, UK, German models only) – ................................ 37

7-9. Printed Wiring Board  – TUNER Section

(East European, CIS models only) – .............................. 38

7-10. Schematic Diagram  – TUNER Section

(East European, CIS models only) – .............................. 39

7-11. Printed Wiring Board  – CD Section – ........................... 41
7-12. Schematic Diagram – CD Section – ............................... 43
7-13. Printed Wiring Boards  – CD MOTOR Section – .......... 45
7-14. Schematic Diagram  – CD MOTOR Section – .............. 47
7-15. Printed Wiring Board  – TAPE DECK Section – ........... 49
7-16. Schematic Diagram  – TAPE DECK Section – .............. 51
7-17. Printed Wiring Board  – LEAF SW Section – ............... 53
7-18. Schematic Diagram  – LEAF SW Section – .................. 53
7-19. Printed Wiring Board  – MAIN Section – ...................... 55
7-20. Schematic Diagram   – MAIN Section (1/4) – ............... 57
7-21. Schematic Diagram  – MAIN Section (2/4) – ................ 59
7-22. Schematic Diagram  – MAIN Section (3/4) – ................ 61
7-23. Schematic Diagram  – MAIN Section (4/4) – ................ 63
7-24. Printed Wiring Board  – PANEL Section – .................... 65
7-25. Schematic Diagram  – PANEL Section – ....................... 67
7-26. Printed Wiring Board  – CD-SW Section – .................... 69
7-27. Schematic Diagram  – CD-SW Section – ...................... 69
7-28. Printed Wiring Board  – HP Section – ........................... 71
7-29. Schematic Diagram  – HP Section – .............................. 71
7-30. Printed Wiring Board  – POWER AMP Section – ......... 72
7-31. Schematic Diagram  – POWER AMP Section – ............ 73
7-32. Printed Wiring Board

– TRANSFORMER Section – ........................................ 75

7-33. Schematic Diagram

– TRANSFORMER Section – ........................................ 76

7-34. IC Pin Function Description ........................................... 82

................................................ 87

............................... 96

The laser diode in the optical pick-up block may suffer electro-
static break-down 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.

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 emis-
sion, observe from more than 30 cm away from the objective lens.

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

aged by heat.

• Keep the temperature of the soldering iron around 270 ˚C dur-

ing 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 ra-
diation exposure.

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

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

The following caution label is located inside the unit.

!   KERÜLJE  A  BESUGÁRZÁST! 

– 4 –

PART No.

MODEL

PART No.

Canadian model

4-996-843-0

π

Israel and Thai models

4-996-843-6

π

E model

4-996-844-0

π

Malaysia, Singapore and

4-996-844-1

π

South African models

GRX7: Saudi Arabia and Taiwan models

4-996-844-2

π

Hong Kong model

4-996-844-3

π

Australian model

4-996-844-4

π

Mexican model

4-996-844-5

π

Indonesian model

4-996-844-7

π

GRX7J

4-996-844-8

π

RX77S: UK model

4-996-845-0

π

RX77S: East European and CIS model

4-996-845-1

π

R700

4-996-845-2

π

RX77: AEP and German model

4-996-845-3

π

RX77: East European model

4-996-845-4

π

!

!

!