SERVICE MANUAL
COMPACT DISC DECK RECEIVER
US Model
Canadian Model
AEP Model
UK Model
HCD-BX6AV
E Model
Australian Model
HCD-DX6AV
SPECIFICATIONS
HCD-BX6AV/DX6AV
Photo: HCD-BX6AV
HCD-BX6AV/DX6AV is the Amplifier,
CD player, Tape player and Tuner
section in MHC-BX6AV/DX6AV.
Model Name Using Similar Mechanism
HCD-BX2/DX2
CD Mechanism Type
EXL-M7
Optical Pick-up Name
OPTIMA-7
Model Name Using Similar Mechanism
HCD-RXD6AV
Tape Transport Mechanism Type
CWL-44-RR
CD
Section
Tape deck
Section
Continued on next page
AUDIO POWER SPECIFICATIONS:
(US model only)
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
with 6 ohm loads both channels driven, from
120-10,000 Hz; rates 10 watts per channel
minimum RMS power, with no more than
10% total harmonic distortion from 250
milliwatts to rated output.
Amplifier section
US model
Center Speaker:
Continuous RMS power output (reference)
40 watts
(6 ohms at 1 kHz,
10% THD)
Rear Speaker:
Continuous RMS power output (reference)
40 + 40 watts
(6 ohms at 1 kHz,
10% THD)
Canadian model
Front Speaker:
Continuous RMS power output (reference)
60 + 60 watts
(6 ohms at 1 kHz,
10% THD)
Total harmonics distortion
Less than 0.07%
(6 ohms at 1 kHz, 30 W)
Center Speaker:
Continuous RMS power output (reference)
40 watts
(6 ohms at 1 kHz,
10% THD)
Rear Speaker:
Continuous RMS power output (reference)
40 + 40 watts
(6 ohms at 1 kHz,
10% THD)
AEP, UK models
Front Speaker:
DIN power output (rated) 40 + 40 watts
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
50 + 50 watts
(6 ohms at 1 kHz,
10% THD)
Music power output (reference)
100 + 100 watts
(6 ohms at 1 kHz,
10% THD)
Center Speaker:
DIN power output (rated) 25 watts
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
35 watts
(6 ohms at 1 kHz,
10% THD)
Music power output (reference)
70 watts
(6 ohms at 1 kHz,
10% THD)
Rear Speaker:
DIN power output (rated) 25 + 25 watts
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
35 + 35 watts
(6 ohms at 1 kHz,
10% THD)
Music power output (reference)
70 + 70 watts
(6 ohms at 1 kHz,
10% THD)
Other models:
The following measured at AC 120/240 V,
50/60 Hz
Front Speaker:
DIN power output (rated) 45 + 45 watts
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
60 + 60 watts
(6 ohms at 1 kHz,
10% THD)
Center Speaker:
DIN power output (rated) 30 watts
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
40 watts
(8 ohms at 1 kHz,
10% THD)
Rear Speaker:
DIN power output (rated) 30 + 30 watts
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
40 + 40 watts
(6 ohms at 1 kHz,
10% THD)
Inputs
MD/VIDEO IN:
voltage 250/450 mV,
(phono jacks)
impedance 47 kilohms
DVD INPUT:
FRONT IN:
voltage 450 mV,
(phono jacks)
impedance 47 kilohms
REAR IN:
voltage 450 mV,
(phono jacks)
impedance 47 kilohms
CENTER IN:
voltage 450 mV,
(phono jacks)
impedance 47 kilohms
WOOFER IN:
voltage 450 mV,
(phono jacks)
impedance 47 kilohms
Outputs
PHONES:
accepts headphones of
(stereo mini jack)
8 ohms or more
FRONT SPEAKER:
accepts impedance of 6 to
16 ohms
REAR SPEAKER:
accepts impedance of 6 to
16 ohms
CENTER SPEAKER:
accepts impedance of 6 to
16 ohms
WOOFER:
Voltage 1 V, impedance
1 kilohms
CD player section
System
Compact disc and digital
audio system
Laser
Semiconductor laser
(
=780nm)
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.
Manufactured under license from Dolby
Laboratories Licensing Corporation.
Additionally licensed under Canadian patent
1,037,877. "Dolby", the double-D symbol ; and
"PRO LOGIC" are trademarks of Dolby
Laboratories Licensing Corporation.
2
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0
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 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 PUB-
LISHED BY SONY.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
Wavelength
780 790 nm
Frequency response
20 Hz 20 kHz (±0.5 dB)
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
660 nm
Output Level
18 dBm
Tape player section
Recording system
4-track 2-channel stereo
Frequency response
40 13,000 Hz (±3 dB),
using Sony TYPE I 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 ohm unbalanced
Intermediate frequency
10.7 MHz
AM tuner section
Tuning range
US, Canadian models:
530 1,710 kHz
(with the interval set at
10 kHz)
531 1,710 kHz
(with the interval set at
9 kHz)
AEP, UK and Middle Eastern models:
531 1,602 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
US, Cnadian models:
120 V AC, 60 Hz
AEP, UK models:
230 V AC, 50/60 Hz
Australian model:
220 240 V AC, 50/60 Hz
Mexican model:
120 V AC, 60 Hz
Other models:
110 120 V or 220 240 V AC, 50/
60 Hz
Adjustable with voltage selector
Power consumption
US model:
160 watts
Canadian model:
180 watts
AEP, UK models:
160 watts
Other models:
160 watts
Dimensions (w/h/d)
Approx. 280 x 325 x 390 mm
Mass
US model:
Approx. 9.2 kg
Canadian model:
Approx. 9.2 kg
AEP, UK models:
Approx. 9.2 kg
Other model:
Approx. 9.1 kg
Supplied accessories:
AM loop antenna (1)
FM lead antenna (1)
Remote Commander (1)
Speaker cords (2)
Center speaker pads (4)
Design and specifications are subject to change
without notice.
This appliance is classified
as a CLASS 1 LASER
product. The CLASS 1
LASER PRODUCT
MARKING is located on
the rear exterior.
TABLE OF CONTENTS
1.
SERVICING NOTES ............................................... 3
2.
GENERAL
Location of Controls .......................................................
4
Setting the Time ..............................................................
5
3.
DISASSEMBLY ......................................................... 6
4.
DIAGRAMS
4-1. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 11
4-2. Schematic Diagram CD Section (1/4) ..................... 12
4-3. Schematic Diagram CD Section (2/4) ..................... 13
4-4. Schematic Diagram CD Section (3/4) ..................... 14
4-5. Schematic Diagram CD Section (4/4) ..................... 15
4-6. Printed Wiring Boards CD Section ......................... 16
4-7. Printed Wiring Boards MAIN Section .................... 17
4-8. Schematic Diagram MAIN Section (1/4) ................ 18
4-9. Schematic Diagram MAIN Section (2/4) ................ 19
4-10. Schematic Diagram MAIN Section (3/4) ................ 20
4-11. Schematic Diagram MAIN Section (4/4) ................ 21
4-12. Printed Wiring Boards PANEL Section .................. 22
4-13. Schematic Diagram PANEL Section ....................... 23
4-14. Printed Wiring Boards
AMP/POWER SUPPLY Section ............................. 24
4-15. Schematic Diagram FRONT AMP Section ............ 25
4-16. Schematic Diagram
CENTER/REAR AMP Section ................................. 26
4-17. Schematic Diagram POWER SUPPLY Section ...... 27
5.
EXPLODED VIEWS ................................................ 33
6.
ELECTRICAL PARTS LIST ............................... 39
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.
3
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.
· MODEL IDENTIFICATION
Rear Panel
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
Model
Power Voltage Indication
US model
AC: 120 V - 60 Hz 160 W
Canadian model
AC: 120 V - 60 Hz 180 W
AEP, UK models
AC: 230 V - 50/60 Hz 160 W
Australian model
AC: 220 240 V - 50/60 Hz 160 W
Mexican model
AC: 120 V - 50/60 Hz 160 W
Other models
AC: 110 120 V/220 240 V - 50/60 Hz 160 W
Power Voltage Indication
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 microamperes.).
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
µF
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
The following caution label is located inside the unit.
4
SECTION 2
GENERAL
· LOCATION OF CONTROLS
Front View
Rear View
1
TIMER indicator
2
I/1 button and indicator
3
DISPLAY button
4
SPECTRUM button
5
GROOVE button and indicator
6
FILE SELECT button
7
PHONES jack
8
ENTER button
9
, . button
0
DISC SKIP EX-CHANGE button
qa
x button
qs
DISC 1 button
qd
h H button and indicator
qf
DISC 2 button
qg
DISC 3 button
qh
X button
qj
Z OPEN/CLOSE button
qk
>, + button
1
FM ANTENNA jack or terminals
2
AM ANTENNA terminals
3
WOOFER OUT jack
4
MD/VIDEO IN jacks
5
DVD INPUT jacks
6
CENTER SPEAKER terminals
7
REAR SPEAKER terminals
8
FRONT SPEAKER terminals
9
CD DIGITAL OUT (OPTICAL) connector
0
VOLTAGE SELECTOR switch (E model)
1
2
3
4
5
6
7
8
9
ql
w;
wa
wf
wh
ws
wg
wd
qg
qd
0
qf
qj
qs
qh qk
qa
wl
es
wk e;
ea ed
wj
9
0
1
3
8
7
6
5
4
2
ql
PLAY MODE, DIRECTION button
(US, Canadian, E, Australian models)
PLAY MODE, PTY/DIRECTION button
(AEP, UK models)
w;
REPEAT, STEREO/MONO button
wa
EDIT, TUNER MEMORY button
ws
VOLUME knob
wd
j J button
wf
REC button and indicator
wg
REC PAUSE button and indicator
wh
CD SYNC button
wj
MD (VIDEO) button and indicator
wk
DOLBY PRO LOGIC button and indicator
wl
TAPE A/B button and indicator
e;
DVD 5.1CH button and indicator
ea
CD button and indicator
es
DSP button and indicator
ed
TUNER/BAND button and indicator
5
9
1 Press CLOCK/TIMER SET.
The hour indication flashes.
Step 3: Setting the
time
You must set the time before using the timer
functions.
The clock uses a 24-hour system on the
European model, and a 12-hour system on
other models.
The 12-hour system is used for illustration
purposes.
1
3,5
2,4
2 Press . or > repeatedly to set
the hour.
3 Press ENTER.
The minute indication flashes.
4 Press . or > repeatedly to set
the minute.
5 Press ENTER.
The clock starts working.
Tip
If you make a mistake, start over from step 1.
To change the time
The previous explanation shows how to set
the time while the power is off. To change the
time while the power is on, do the following:
1 Press CLOCK/TIMER SET.
2 Press . or > repeatedly to select SET
CLOCK.
3 Press ENTER.
4 Perform steps 2 through 5 above.
Notes
· The clock settings are canceled when you
disconnect the power cord or if a power failure
occurs.
· For MHC-BX6AV, you cannot set the time in the
Power Saving Mode (see page 12).
This section is extracted from
instruction manual.