SONY HCD BX2, HCD DX2, HCD DX2B Service Manual
HCD-BX2/DX2/DX2B
SERVICE MANUAL
HCD-BX2/DX2/DX2B is the Amplifier,
CD player, Tape Deck and Tuner
section in HMC-BX2/DX2/DX2B.
Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol ; are trademarks of Dolby Laboratories Licensing Corporation.
Photo: HCD-BX2
CD
Section
Tape deck
Section
US Model
Canadian Model
AEP Model
UK Model
HCD-BX2
E Model
HCD-DX2/DX2B
Australian Model
HCD-DX2
Model Name Using Similar Mechanism NEW
CD Mechanism Type EXL-M7
Optical Pick-up Name OPTIMA-7
Model Name Using Similar Mechanism HCD-GRX20
Tape Transport Mechanism Type CWL-44-FR
AUDIO POWER SPECIFICATIONS:
(U.S.A. model only)
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
with 6 ohm loads both channels driven, from
120 – 10,000 Hz; rated 60 watts per channel
minimum RMS power, with no more than
10% total harmonic distortion from
250 milliwatts to rated output.
Amplifier section
Canadian model:
Continuous RMS power output
European model:
DIN power output (Rated)
Continuous RMS power output (Reference)
Music power output (Reference)
Other models:
The following measured at AC 110, 220 V 60 Hz:
DIN power output (Rated)
Continuous RMS power output (Reference)
The following measured at AC 120, 240 V 60 Hz:
DIN power output (Rated)
Continuous RMS power output (Reference)
50 + 50 watts
(6 ohms at 1 kHz,
10% THD)
40 + 40 watts
(6 ohms at 1 kHz, DIN)
50 + 50 watts
(6 ohms at 1 kHz,
10% THD)
100 + 100 watts
(6 ohms at 1 kHz,
10% THD)
45 + 45 watts
(6 ohms at 1 kHz, DIN)
50 + 50 watts
(6 ohms at 1 kHz,
10% THD)
50 + 50 watts
(6 ohms at 1 kHz, DIN)
60 + 60 watts
(6 ohms at 1 kHz,
10% THD)
SPECIFICATIONS
Inputs
MD IN: voltage 450 mV,
(phono jacks) impedance 47 kilohms
Outputs
PHONES: accepts headphones of
(stereo mini jack) 8 ohms or more
SPEAKER:
HCD-BX2: accepts impedance of 6 to
HCD-DX2: accepts impedance of 6 to
CD player section
System Compact disc and digital
Laser Semiconductor laser
Laser output Max. 44.6
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
16 ohms
16 ohms
audio system
(λ=780nm)
Emission duration:
continuous
µ
W*
*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.
MINI HiFi COMPONENT SYSTEM
Tape player section
Recording system 4-track 2-channel stereo
Frequency response 40 – 13,000 Hz (±3 dB),
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
Pan-American model: 530 – 1,710 kHz
European and Middle Eastern models:
Other models: 531 – 1,602 kHz
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz
using Sony TYPE I
cassette
(with the interval set at
10 kHz)
531 – 1,710 kHz
(with the interval set at
9 kHz)
531 – 1,602 kHz
(with the interval set at
9 kHz)
(with the interval set at
9 kHz)
530 – 1,710 kHz
(with the interval set at
10 kHz)
– Continued on next page –
General
Power requirements
North American model: 120 V AC, 60 Hz
European model: 230 V AC, 50/60 Hz
Australian model: 220 – 240 V AC, 50/60 Hz
Mexican model: 120 V AC, 50/60 Hz
Other models: 110 – 120 V or 220 – 240 V
Power consumption
U.S.A. model: 110 watts
Canadian model: 120 watts
European model: 105 watts
Other model: 120 watts
Dimensions (w/h/d)
Mass
U.S.A. model: Approx. 8.1 kg
Canadian model: Approx. 8.1 kg
European model: Approx. 8.2 kg
Other model: Approx. 8.3 kg
Supplied accessories: AM loop antenna (1)
Design and specifications are subject to change
without notice.
AC, 50/60 Hz
Adjustable with voltage
selector
Approx. 280 x 325 x 418 mm
FM lead antenna (1)
Remote Commander (1)
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 ....................................................... 13
4-2. Schematic Diagram – CD Section (1/4) – ..................... 14
4-3. Schematic Diagram – CD Section (2/4) – ..................... 15
4-4. Schematic Diagram – CD Section (3/4) – ..................... 16
4-5. Schematic Diagram – CD Section (4/4) – ..................... 17
4-6. Printed Wiring Boards – CD Section – ......................... 18
4-7. Printed Wiring Boards – MAIN/TR Boards –............... 19
4-8. Schematic Diagram – MAIN Board (1/4) – .................. 20
4-9. Schematic Diagram – MAIN Board (2/4) – .................. 21
4-10. Schematic Diagram – MAIN Board (3/4) – .................. 22
4-11. Schematic Diagram
– MAIN (4/4)/TR Boards – ............................................ 23
4-12. Schematic Diagram – PANEL Section (1/3) – .............. 24
4-13. Schematic Diagram – PANEL Section (2/3) – .............. 25
4-14. Schematic Diagram – PANEL Section (3/3) – .............. 26
4-15. Printed Wiring Board – PANEL Section – .................... 27
4-16. Printed Wiring Board – AMP Board
(US, Canadian, AEP, UK, Australian models) – ............ 28
4-17. Schematic Diagram – AMP Board
(US, Canadian, AEP, UK, Australian models) – ............ 29
4-18. Printed Wiring Boards
– AMP (E model)/AC/FUSE Boards – ........................... 30
4-19. Schematic Diagram
– AMP (E model)/AC/FUSE Boards – ........................... 31
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 MANU AL OR IN SUPPLEMENTS PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE 0
SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
5. EXPLODED VIEWS................................................ 37
6. ELECTRICAL PARTS LIST ............................... 43
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation exposure.
This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
2
SECTION 1
SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
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.
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.
• MODEL IDENTIFICATION
– Rear Panel –
Power Voltage Indication
Model Power Voltage Indication
US model AC: 120 V - 60 Hz 110 W
Canadian model AC: 120 V - 60 Hz 120 W
AEP, UK models AC: 230 V - 50/60 Hz 105 W
Australian model AC: 220 – 240 V - 50/60 Hz 120 W
Mexican model AC: 110 – 120 V - 50/60 Hz 120 W
Other models AC: 110 – 120 V/220 – 240 V - 50/60 Hz 120 W
3
• LOCATION OF CONTROLS
SECTION 2
GENERAL
– Front View –
1
2
3
4
5
6
7
8
9 0 qa qs qd
wfws wh
wjwg wlwd
1 TIMER indicator
2 STANDBY ?/1 button and indicator
3 DISPLAY button
4 SPECTRUM button
5 GROOVE button and indicator
qf
qg
qh
qj
qk
ql
w;
wa
e;wk
6 FILE SELECT button
7 PHONES jack
8 ENTER button
9 – . button
0 x button
qa g G button and indicator
qs X button
qd > + button
qf PLAY MODE, DIRECTION button
qg REPEAT, STEREO/MONO button
qh EDIT, TUNER MEMORY button
qj VOLUME knob
qk j J button
ql REC button and indicator
w; REC PAUSE button and indicator
wa CD SYNC button
ws DISC SKIP EX-CHANGE button
wd MD button and indicator
wf DISC 1 button
wg TAPE A/B button and indicator
wh DISC 2 button
wj CD button and indicator
wk DISC 3 button
wl TUNER/BAND button and indicator
e; Z OPEN/CLOSE button
– Rear View –
4
1 2
3
4
5
6
1 CD DIGITAL OUTPUT (OPTICAL) connector
2 VOLTAGE SELECTOR switch (E model)
3 AM ANTENNA terminals
4 FM ANTENNA jack or terminals
5 MD IN jacks
6 SPEAKER terminals
This section is extracted from
instruction manual.
Step 2: 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.
nN
Xx
>
.
mM
2,4
1
3,5
1
Press CLOCK/TIMER SET.
The hour indication flashes.
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.
Note
The clock settings are canceled when you disconnect
the power cord or if a power failure occurs.
5
SECTION 3
s
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
CD DOOR
2 five claws
3 CD door
1 Pull out the CD tray.
4 Push the CD tray.
CD ASS’Y
6 wire (flat type) (22core)
(CN705)
1 screw
4 four claws
8 CD ass'y
CD TRAY (Page 10)
3
2 two screw
5 connector
(CN703)
7 wire (6core)
(CN301)
1 screw
6
FRONT PANEL
)
s
2 connector
(CN201)
8 front panel section
7 two claws
5 three screws
6 screw
CN601
4 two rivets
1 wire (flat type) (16core)
2 connector
3 wire (flat type
(CN702)
6 screw
MECH DECK (CWL-44-FR)
1 six screws
2 harnes
3 mech deck (CWL-44-FR)
7
POWER TRANSFORMER (T001)
)
1 Remove two solders.
3 four screws
4 power transformer (T001
2 connector
(CN803)
REAR COVER
1 four screws
1 screw
1 eight screws
1 two screws
2 rear cover
8
AMP BOARD
r
5 screw
9 two screws
9 screw
6 harness
7 bracket
8 TR board
qa AMP board
2 screw
3 AC cord washe
4 power cord
MAIN BOARD
0 connector
(CN701)
4 MAIN board
2 wire (flat type) (16core)
(CN501)
1 three screws
3 two screws
1 flat cable
(CN804)
9
CD TRAY
)
2 top cabinet
1 two screws
1 two screws
4 screw
5 bracket
3 wire (flat type) (5core
(CN06)
6 screw
7 bracket
DECODE BOARD
8 CD tray
6 DECODE board
1 wire (flat type) (5core)
(CN706)
3 connector
(CN707)
5 connector
(CN702)
4 three screws
2 wire (flat type) (15core)
(CN701)
10
BASE UNIT
s
4 screw
2 screw
5 UD-cam
3 UD-gear
7 spring
6 spring
CASSETTE LID
8 spring
1 two screw
9 base unit
cassette door
(Note: Four claws are used.)
11
MEMO
12
SECTION 4
d
DIAGRAMS
• Circuit Boards Location
SENSOR board
SW C board
MAIN board
SW D board
SW B board
TR board
DECODE board
MOTOR boar
SW A board
4-1. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Printed Wiring Board:
• Y : parts extracted from the conductor side.
• b : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. U: µF,
pF: µµF 50 WV or less are not indicated except for
electrolytics and tantalums.
• If a numeric value of capacitor is a decimal fraction, the
preceding zero may be omitted.
(For example, .1 expresses 0.1)
• All resistors are in Ω and 1/
specified.
• 5 : fusible resistor.
• 3 : printed resistor.
• C : panel designation.
Note:
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part
number specified.
• U : B+ Line.
• V : B– Line.
• H : adjustment for repair.
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F : FM
f : AM
E : TAPE PLAY (DECK A)
d : TAPE PLAY (DECK B)
G : TAPE REC
J : CD PLAY (ANALOG OUT)
c : CD PLAY (DIGITAL OUT)
• Abbreviation
AUS : Australian model
CND : Canadian model
4
W or less unless otherwise
Note:
Les composants identifiés par
une marque 0 sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce portant le numéro
spécifié.
FRONT board
H/P board
SOCKET board
AMP board
1313
HCD-BX2/DX2/DX2B
4-2. SCHEMATIC DIAGRAM – CD Section (1/4) – • See page 32 for Waveforms. • See page 32 for IC Block Diagrams.
(Page 16)
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : CD PLAY
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.
Les composants identifiés par une marque 0 sont
critiques pour la sécurité. Ne les remplacer que
par une pièce portant le numéro spécifié.
(Page 15)
1414
4-3. SCHEMATIC DIAGRAM – CD Section (2/4) –
HCD-BX2/DX2/DX2B
(Page
14)
(Page 25)
(Page 20)
1515
(Page 17)
• Voltages are dc with respect to ground under no-signal
conditions.
no mark : CD PLAY
HCD-BX2/DX2/DX2B
4-4. SCHEMATIC DIAGRAM – CD Section (3/4) –
(Page 14)
(Page 17)
• Voltages are dc with respect to ground under no-signal
conditions.
no mark : CD PLAY
1616
4-5. SCHEMATIC DIAGRAM – CD Section (4/4) – • See page 32 for Waveforms. • See page 32 for IC Block Diagrams.
HCD-BX2/DX2/DX2B
(Page 15)
(Page 16)
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : CD PLAY
1717
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