MINI HI-FI COMPONENT SYSTEM
Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation
9-928-900-12
2001J1600-1
© 2001.10
HCD-MC3AV
US Model
Canadian Model
Australian Model
SERVICE MANUAL
Manufactured under license from Dolby Laboratories
Licensing Corporation.
"DOLBY" and the double-D symbol
a and "PRO
LOGIC" are trademarks of Dolby Laboratories
Licensing Corporation.
· HCD-MC3AV is the tuner, deck,
CD and amplifier section in MHC-MC3AV.
-- Continued on next page --
SPECIFICATIONS
Model Name Using Similar Mechanism HCD-F150/FR10
CD Mechanism Type
CDM-46B1
Optical Pick-up Name
KSS-213BA/F-NP
Model Name Using Similar Mechanism HCD-DR8AV
Tape Transport Mechanism Type
TCM-230AWR2/230PWR2
CD
Section
Tape deck
Section
Amplifier section
U.S.A models:
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC DISTORTION:
With 8
loads both channels driven, from 70 20,000 Hz; rated 80 W per
channel minimum RMS power, with no more than 0.9% total harmonic
distortion from 250 mW to read output.
North American model:
Front Speaker:
Continuous RMS power output
80 + 80 W
(8
at 1 kHz, 10% THD)
Total harmonic distortion
less than 0.09%
(8
at 1 kHz, 40 W)
Center Speaker:
Continuous RMS power output
20 W
(8
at 1 kHz. 1% THD)
Rear Speaker:
Continuous RMS power output
10 + 10 W
(16
at 1 kHz, 1% THD)
Australian model:
The following measured at AC 240 V, 60 Hz;
Front Speaker:
DIN power output (Rated)
70 + 70 W
(8
at 1 kHz, DIN)
Continuous RMS power output (Reference)
80 + 80 W
(8
at 1 kHz, 10% THD)
Center Speaker:
DIN power output (Rated)
17.5 W
(8
at 1 kHz, DIN)
Continuous RMS power output (Reference)
20 W
(8
at 1 kHz, 10% THD)
Rear Speaker:
DIN power output (Rated)
8 + 8 W
(8
at 1 kHz, DIN)
Continuous RMS power output (Reference)
10 + 10 W
(8
at 1 kHz, 10% THD)
Ver 1.1 2001. 10
-- 2 --
The following measured at AC 220 V, 60 Hz;
Front Speaker:
DIN power output (Rated)
60 + 60 W
(8
at 1 kHz, DIN)
Continuous RMS power output (Reference)
70 + 70 W
(8
at 1 kHz, 10% THD)
Center Speaker:
DIN power output (Rated)
15 W
(8
at 1 kHz, DIN)
Continuous RMS power output (Reference)
17.5 watts
(8
at 1 kHz, 10% THD)
Rear Speaker:
DIN power output (Rated)
7 + 7 W
(8
at 1 kHz, DIN)
Continuous RMS power output (Reference)
8.5 + 8.5 W
(8
at 1 kHz, 10% THD)
Inputs
VIDEO/MD IN (phono jack):
voltage 250 mV/450 mV,
impedance 47 k
Outputs
VIDEO/MD OUT (phono jack):
voltage 250 mV,
impedance 1 k
PHONES (stereo phone jacks): accepts headphones of 8 W or more
SPEAKER:
accepts impedance of 8 to 16
REAR SPEAKER:
accepts impedance of 16
CENTER SPEAKER:
accepts impedance of 8
SUPER WOOFER:
voltage 1 V, impedance 1 k
CD player section
System
Compact disc and digital audio system
Laser
Semiconductor laser (
=780 mm)
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)
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)
Wave length
600 nm
Output level
18 dBm
Tape player section
Recording system
4-track 2-channel stereo
Frequency response (DOLBY NR OFF)
40 13,000 Hz (± 3 dB),
using Sony TYPE I
cassette
40 14,000 Hz (± 3 dB),
using Sony TYPE II
cassette
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 W unbalanced
Intermediate frequency
10.7 MHz
AM tuner section
Tuning range
530 1,710 kHz
(with the interval set at 10 kHz)
531 1,710 kHz
(with the interval set at 9 kHz)
Antenna
AM loop antenna
Antenna terminals
External antenna terminal
Intermediate frequency
450 kHz
General
Power requirements
North American model:
120 V AC, 60 Hz
Australian model:
220 - 240 V AC, 50/60 Hz
Power consumption
U.S.A models:
250 W
Canadian models:
250 VA
Australian models:
250 W
Dimensions (w/h/d)
Approx. 280
× 373 × 437 mm
(111/8
× 143/4 × 171/4 in)
Mass
Approx. 12 kg (26 lbs. 7 oz)
Supplied accessories:
AM loop antenna (1)
Remote RM-SF250AV (1)
Batteries (2)
FM lead antenna (1)
Speaker cords (5)
Front speaker pads (8)
Center speaker pads (4)
Design and specifications are subject to change without notice.
For customers in Canada
(For MHC-MC3AV)
Use only the supplied SS-SR50 rear surround speaker for connection to the REAR
SPEAKER connector, the supplied SS-CN50 center surround speaker for connection
to the CENTER SPEAKER connector on the MHC-MC3AV.
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
PUBLISHED BY SONY.
This appliance is classified as a CLASS 1 LASER product. The
CLASS 1 LASER PRODUCT MARKING is located on the rear
exterior.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE
! SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
SAFETY CHECK-OUT
(US model only)
After correcting the original service problem, perform the
following safety checks 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
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" 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)
Earth Ground
AC
voltmeter
(0.75V)
1.5k
0.15
µF
Fig. A. Using an AC voltmeter to check AC leakage.
To Exposed Metal
Parts on Set
-- 3 --
-- 4 --
TABLE OF CONTENTS
1. GENERAL
FRONT PANEL ···································································· 5
REAR PANEL ······································································· 6
2. DISASSEMBLY ······························································· 8
3. TEST MODE ··································································· 16
4. MECHANICAL ADJUSTMENTS ···························· 18
5. ELECTRICAL ADJUSTMENTS
Deck Section ········································································ 21
CD Section ··········································································· 25
6. DIAGRAMS
6-1.
Block Diagram CD Section ············································ 27
Block Diagram Main Section ········································· 29
Block Diagram Audio Section ········································ 31
6-2.
Circuit Boards Location ··················································· 33
6-3.
Printed Wiring Board BD Section ·································· 35
6-4.
Schematic Diagram
BD Section ···································· 37
6-5.
Printed Wiring Board CD Motor Section ······················· 39
6-6.
Schematic Diagram CD Motor Section ·························· 41
6-7.
Printed Wiring Board Audio Section ······························ 43
6-8.
Schematic Diagram Audio Section ································· 45
6-9.
Printed Wiring Board Leaf SW Section ························· 47
6-10. Schematic Diagram Leaf SW Section ···························· 49
6-11. Printed Wiring Board Main Section ······························· 51
6-12. Schematic Diagram Main (1/5) Section ························· 53
6-13. Schematic Diagram Main (2/5) Section ························· 55
6-14. Schematic Diagram Main (3/5) Section ························· 57
6-15. Schematic Diagram Main (4/5) Section ························· 59
6-16. Schematic Diagram Main (5/5) Section ························· 61
6-17. Printed Wiring Board Panel Section ······························· 63
6-18. Schematic Diagram Panel Section ································· 65
6-19. Printed Wiring Board Surround Amp Section ················ 67
6-20. Schematic Diagram Surround Amp Section ··················· 69
6-21. Schematic Diagram Power Section ································ 71
6-22. Printed Wiring Board Power Section ····························· 73
6-23. Waveforms ········································································ 75
6-24. IC Pin Function Description ············································· 76
6-25. IC Block Diagrams ··························································· 84
7. EXPLODED VIEWS ····················································· 86
8. ELECTRICAL PARTS LIST ····································· 94
SERVICING NOTES
The laser diode in the optical pick-up block may suffer electrostatic
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 emission, observe
from more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
Carry out the "S curve check" in "CD section adjustment" and check
that the S curve waveform is output repeatedly.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
Notes on chip component replacement
· Never reuse a disconnected chip component.
· Notice that the minus side of a tantalum capacitor may be damaged
by heat.
Flexible Circuit Board Repairing
· Keep the temperature of the 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.
-- 5 --
SECTION 1
GENERAL
FRONT PANEL
57
69
80
!¡
!TM
!£
!¢
!¶
!·
@º
!ª
!
@¡
@TM
!§
#§
2
3
4
#£
#TM
#¡
#
1
#¢
@£
@¢
@
@ª
@·
#º
@§
@¶
#¶
1 1/u button
2 DISPLAY/MEMO button
3 CLOCK TIMER SET button
4 TIMER SELECT button
5 TAPE A ª button
6 CD fl button
7 TAPE A · button
8 TAPE B ª button
9 TUNER/BAND button
0 TAPE B · button
!¡ SUR button
!TM DBFB button
!£ FUNCTION button
!¢ CONTINUE/DIRECTION button
! PROGRAM/DOLBY-NR button
!§ SHUFFLE/STEREO/MONO button
!¶ REPEAT/TUNER MEMORY button
!· GROOVE button
!ª LOOP button
@º FLASH button
@¡ CD PLUS ONE button
@TM GROUP ENTRY button
@£ Numeric buttons
@¢ PHONES jack
@ VOLUME Knob
@§ STOP button
@¶ INPUT, SCAN, SEARCH, CHECK,
CLEAR, DELETE buttons
@· + )+ button
@ª SELECTOR button
#º =0 button
#¡ ENTER button
#TM FILE SELECT button
#£ P PAUSE button
#¢ r REC button
# CD SYNCHRO button
#§ HI-SPEED DUBBING button
#¶ PRO LOGIC button