HCD-GRX5, HCD-RX66, MHC-GRX5, MHC-RX66 - Sony Audio Service Manual (repair manual)

hcd-grx5, hcd-rx66, mhc-grx5, mhc-rx66 service manual
Model
HCD-GRX5 HCD-RX66 MHC-GRX5 MHC-RX66
Pages
70
Size
6.57 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
hcd-grx5-hcd-rx66-mhc-grx5-mhc-rx66.pdf
Date

Read Sony HCD-GRX5 / HCD-RX66 / MHC-GRX5 / MHC-RX66 Service Manual online

MICROFILM
SERVICE MANUAL
MINI Hi-Fi COMPONENT SYSTEM
US Model
Canadian Model
HCD-RX66
E Model
Australian Model
HCD-GRX5
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
HCD-GRX5/RX66
HCD-GRX5/RX66 is the Amplifier, CD
player, Tape Deck and Tuner section in
MHC-GRX5/RX66.
Photo: HCD-RX66
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
SPECIFICATIONS
AUDIO POWER SPECIFICATIONS:
(U.S.A. model only)
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
with 6 ohm loads both channels driven, from 70 - 20,000 Hz; rates 60
watts per channel minimum RMS power, with no more than 0.9% total
harmonic distortion from 250 milliwatts to rated output.
Amplifier section
Canadian model:
Continuous RMS power output (reference)
60 + 60 watts
(6 ohms at 1 kHz, 10% THD)
Total harmonic distortion less than 0.07%
(6 ohms at 1 kHz, 45 W)
Other models:
The following measured at AC 110, 220 V 50/60 Hz
DIN power output (rated)
50 + 50 watts
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
65 + 65 watts
(6 ohms at 1 kHz, 10% THD)
The following measured at AC 120, 240 V 50/60 Hz
DIN power output (rated)
60 + 60 watts
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
75 + 75 watts
(6 ohms at 1 kHz, 10% THD)
Peak music power output (reference)
1000 watts
Inputs
MD/VIDEO IN:
voltage 450 mV,
(phono jacks)
impedance 47 kilohms
MIX MIC: (phone jack)
sensitivity 1 mV, impedance 10
kilohms
– Continued on next page –
– 2 –
Specifications (continued)
Outputs
MD/VIDEO OUT:
voltage 250 mV,
(phono jacks)
impedance 1 kilohms
PHONES:
accepts headphones of 8 ohms
(stereo phone jack)
or more
SPEAKER:
accepts impedance of 6 to 16 ohms
SUPER WOOFER:
Voltage 1 V, impedance 1 kilohm
CD player section
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
Tape player section
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
Wow and flutter
±0.15% W.Peak (IEC)
0.1% W.RMS (NAB)
±0.2% W.Peak (DIN)
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
North American models:
530 - 1,710 kHz
(with the interval set at 10 kHz)
531 - 1,710 kHz
(with the interval set at 9 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
General
Power requirements
North American models:
120 V AC, 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
U.S.A. model:
140 watts
Canadian model:
120 watts
Other models:
140 watts
Dimensions (w/h/d)
Approx. 280 
×
 335 
×
 380 mm
(11
1
/
×
 13
1
/
8
 
× 
15 in.)
Mass
U.S.A. model:
Approx. 8.8 kg (19 lbs. 6 oz.)
Canadian model:
Approx. 8.4 kg (18 lbs. 8 oz.)
Other models:
Approx. 9.4 kg (20 lbs. 12 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 –
TABLE  OF  CONTENTS
1.
SERVICING  NOTES
............................................... 3
2.
GENERAL
Location of Controls ....................................................... 6
Setting the Time .............................................................. 7
3.
DISASSEMBLY
......................................................... 8
4.
TEST  MODE
.............................................................. 11
5.
MECHANICAL  ADJUSTMENTS
....................... 13
6.
ELECTRICAL  ADJUSTMENTS
DECK Section ................................................................. 13
CD Section ...................................................................... 16
7.
DIAGRAMS
................................................................. 18
7-1. Block Diagram
– CD MECHANISM DECK Section – .......................... 19
7-2. Block Diagram
– TAPE DECK Section – ................................................ 21
7-3. Block Diagram
– MAIN Section – ........................................................... 23
7-4. Block Diagram
– DISPLAY/KEY CONTROL/POWER SUPPLY
Section –  ........................................................................ 25
7-5. Printed Wiring Boards  – CD Section – ......................... 29
7-6. Schematic Diagram – CD Section – ............................... 31
7-7. Printed Wiring Board  – CD MOTOR Section – ............ 33
7-8. Schematic Diagram  – CD MOTOR Section – .............. 35
7-9. Printed Wiring Board  – TAPE DECK Section – ........... 37
7-10. Schematic Diagram  – TAPE DECK Section – .............. 39
7-11. Printed Wiring Board  – LEAF SW Section – ............... 41
7-12. Schematic Diagram  – LEAF SW Section – .................. 41
7-13. Printed Wiring Board  – MAIN Section – ...................... 43
7-14. Schematic Diagram
– MAIN Section (1/4) – .................................................. 45
7-15. Schematic Diagram
– MAIN Section (2/4) – .................................................. 47
7-16. Schematic Diagram
– MAIN Section (3/4) – .................................................. 49
7-17. Schematic Diagram
– MAIN Section (4/4) – .................................................. 51
7-18. Printed Wiring Board  – PANEL Section – .................... 53
7-19. Schematic Diagram  – PANEL Section – ....................... 55
7-20. Printed Wiring Board  – CD-SW Section – .................... 57
7-21. Schematic Diagram  – CD-SW Section – ...................... 57
7-22. Printed Wiring Board  – HP Section – ........................... 59
7-23. Schematic Diagram  – HP Section – .............................. 59
7-24. Printed Wiring Board  – POWER AMP Section – ......... 60
7-25. Schematic Diagram  – POWER AMP Section – ............ 61
7-26. Printed Wiring Board
– TRANSFORMER Section – ........................................ 63
7-27. Schematic Diagram
– TRANSFORMER Section – ........................................ 64
7-28. IC Pin Function Description ........................................... 68
8.
EXPLODED  VIEWS
................................................ 73
9.
ELECTRICAL  PARTS  LIST
............................... 82
SECTION  1
SERVICING  NOTES
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.
NOTES  ON  LASER  DIODE  EMISSION  CHECK
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.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Flexible Circuit Board Repairing
• 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.
NOTES  ON  HANDLING  THE  OPTICAL  PICK-UP
BLOCK  OR  BASE  UNIT
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.
CAUTION
:
INVISIBLE LASER RADIATION WHEN OPEN AND INTER-
LOCKS DEFEATED.  AVOID EXPOSURE TO BEAM.
ADVARSEL
:
USYNLIG LASERSTRÅLING VED ÅBNING NÅR
SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION. UNDGÅ UDSAETTELSE FOR
STRÅLING.
VORSICHT
:
UNSICHTBARE LASERSTRAHLUNG, WENN ABDECKUNG
GEÖFFNET UND SICHEREITSVERRIEGELUNG ÜBERBRÜCKT. NICHT DEM
STRAHL AUSSETZEN.
VARO
!
:
AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET
ALTTIINA NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE. ÄLÄ KATSO SÄTEESEEN.
VARNING
:
OSYNLING LASERSTRÅLING NÄR DENNA DEL ÄR
ÖPPNAD OCH SPÄRREN ÄR URKOPPLAD. BETRAKTA EJ STRÅLEN.
ADVERSEL
:
USYNLIG LASERSTRÅLING NÅR DEKSEL ÅPNES OG
SIKKERHEDSLÅS BRYTES. UNNGÅ EKSPONERING FOR STRÅLEN.
VIGYAZAT
!
:
A BURKOLAT NYITÁSAKOR LÁTHATATLAN
LÉZERSUGÁRVESZÉLY
!  KERÜLJE A BESUGÁRZÁST!
– 4 –
PART No.
MODEL  IDENTIFICATION
– Back Panel –
MODEL
PART No.
RX66: US model
4-996-725-0
π
RX66: Canadian model
4-996-725-1
π
GRX5: Thai and Israel models
4-996-725-2
π
GRX5: E model
4-996-842-0
π
GRX5: Malaysia, Singapore and
4-996-842-1
π
South African models
GRX5: Saudi Arabia and Taiwan models
4-996-842-2
π
GRX5: Hong Kong model
4-996-842-3
π
GRX5: Australian model
4-996-842-4
π
GRX5: Mexican model
4-996-842-5
π
GRX5: Indonesian model
4-996-842-7
π
ATTENTION  AU  COMPOSANT  AYANT  RAPPORT
À  LA  SÉCURITÉ!
LES  COMPOSANTS  IDENTIFIÉS  PAR  UNE  MARQUE  
!
SUR  LES  DIAGRAMMES  SCHÉMATIQUES  ET  LA  LISTE
DES  PIÈCES  SONT  CRITIQUES  POUR  LA  SÉCURITÉ
DE  FONCTIONNEMENT.  NE  REMPLACER  CES  COM-
POSANTS  QUE  PAR  DES  PIÈCES  SONY  DONT  LES
NUMÉROS  SONT  DONNÉS  DANS  CE  MANUEL  OU
DANS  LES  SUPPLÉMENTS  PUBLIÉS  PAR  SONY.
SAFETY-RELATED  COMPONENT  WARNING!!
COMPONENTS  IDENTIFIED  BY  MARK  
!
  OR  DOTTED
LINE  WITH  MARK  
!
  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  PUB-
LISHED  BY  SONY.
SAFETY  CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety check before releasing 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 chassis, must not exceed 0.5 mA (500 microampers.).
Leakage current can be measured by any one of three methods.
1. 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.
3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The “limit” indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are suit-
able.  (See Fig. A)
Fig. A.
Using an AC voltmeter to check AC leakage.
1.5 k
0.15 
µ
F
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
Page of 70

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