Sony HCD-BX7DAB Service Manual ▷ View online
SERVICE MANUAL
Model Name Using Similar Mechanism
HCD-CBX3
Base Unit Name
BU-K6BD90U-WOD
Optical Pick-up Block Name
KSM-213DCP
COMPACT DISC RECEIVER
SPECIFICATIONS
HCD-BX7DAB
Ver. 1.1 2007.07
– Continued on next page –
9-887-695-02
2007G05-1
© 2007.07
© 2007.07
Sony Corporation
Personal Audio Division
Published by Sony Techno Create Corporation
Published by Sony Techno Create Corporation
UK Model
•
HCD-BX7DAB is the amplifier, USB, CD player and
tuner section in CMT-BX7DAB.
tuner section in CMT-BX7DAB.
• “WALKMAN” and “WALKMAN” logo are registered
trademarks of Sony Corporation.
• MICROVAULT is a trademark of Sony Corporation.
• ATRAC, ATRAC3, ATRAC3plus and their logos are
• ATRAC, ATRAC3, ATRAC3plus and their logos are
trademarks of Sony Corporation.
• U.S. and foreign patents licensed from Dolby
Laboratories.
• MPEG Layer-3 audio coding technology and patents
licensed from Fraunhofer IIS and Thomson.
Amplifier section
DIN power output (rated):
18 + 18 watts (6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
25 + 25 watts (6 ohms at 1 kHz, 10% THD)
Music power output (reference):
38 + 38 watts (6 ohms at 1 kHz, 10% THD)
18 + 18 watts (6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
25 + 25 watts (6 ohms at 1 kHz, 10% THD)
Music power output (reference):
38 + 38 watts (6 ohms at 1 kHz, 10% THD)
Inputs:
AUDIO IN (stereo mini jack):
voltage 250 mV, impedance
47 kilohms
voltage 250 mV, impedance
47 kilohms
(USB) port: Type A, maximum
current 500 mA
Outputs:
PHONES (stereo mini jack): accepts
headphones of 8 ohms or more
SPEAKER: accepts impedance of 6 to
16 ohms
headphones of 8 ohms or more
SPEAKER: accepts impedance of 6 to
16 ohms
USB section
Supported bit rate
MP3 (MPEG 1 Audio Layer-3):
32 – 320 kbps, VBR
ATRAC: 48 – 352 kbps
(ATRAC3plus), 66/105/132 kbps
(ATRAC3)
WMA: 32 – 192 kbps, VBR
AAC: 48 – 320 kbps
32 – 320 kbps, VBR
ATRAC: 48 – 352 kbps
(ATRAC3plus), 66/105/132 kbps
(ATRAC3)
WMA: 32 – 192 kbps, VBR
AAC: 48 – 320 kbps
Sampling frequencies
MP3 (MPEG 1 Audio Layer-3):
32/44.1/48 kHz
ATRAC: 44.1 kHz
WMA: 44.1 kHz
AAC: 44.1 kHz
32/44.1/48 kHz
ATRAC: 44.1 kHz
WMA: 44.1 kHz
AAC: 44.1 kHz
CD player section
System: Compact disc and digital audio
system
Laser Diode Properties
system
Laser Diode Properties
Emission duration: continuous
Laser Output*: Less than 44.6
Laser Output*: Less than 44.6
µ
W
*This output is the value measurement
at a distance of 200mm from the
objective lens surface on the Optical
Pick-up Block with 7mm aperture.
objective lens surface on the Optical
Pick-up Block with 7mm aperture.
Frequency response: 20 Hz – 20 kHz
Signal-to-noise ratio: More than 90 dB
Dynamic range: More than 90 dB
Signal-to-noise ratio: More than 90 dB
Dynamic range: More than 90 dB
Tuner section
DAB tuner section:
Frequency range*
Band-III: 174.928 (5A) – 239.200
(13F) MHz
(13F) MHz
* For details, see “DAB frequency table”.
Antenna: FM/DAB lead antenna
Antenna terminal: 75 ohms, F female
Antenna terminal: 75 ohms, F female
FM stereo, FM/AM superheterodyne tuner
FM tuner section:
Tuning range: 87.5 – 108.0 MHz (50 kHz
step)
Antenna: FM lead antenna
Antenna terminals: 75 ohms unbalanced
Intermediate frequency: 10.7 MHz
step)
Antenna: FM lead antenna
Antenna terminals: 75 ohms unbalanced
Intermediate frequency: 10.7 MHz
AM tuner section:
Tuning range: 531 – 1,602 kHz (with 9 kHz
tuning interval)
Antenna: AM loop antenna, external
antenna terminal
Intermediate frequency: 450 kHz
tuning interval)
Antenna: AM loop antenna, external
antenna terminal
Intermediate frequency: 450 kHz
2
HCD-BX7DAB
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.
damaged by heat.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.
other than those specified herein may result in hazardous radiation
exposure.
classified as a CLASS
1 LASER product. This
marking is located on the
rear exterior.
1 LASER product. This
marking is located on the
rear exterior.
This appliance is
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 PUBLISHED BY SONY.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
DAB frequency table (Band-III)
Frequencies are displayed to two decimal
places on this system.
places on this system.
Frequency
Label
Frequency
Label
174.928 MHz 5A
209.936 MHz 10A
176.640 MHz 5B
211.648 MHz 10B
178.352 MHz 5C
213.360 MHz 10C
180.064 MHz 5D
215.072 MHz 10D
181.936 MHz 6A
216.928 MHz 11A
183.648 MHz 6B
218.640 MHz 11B
185.360 MHz 6C
220.352 MHz 11C
187.072 MHz 6D
222.064 MHz 11D
188.928 MHz 7A
223.936 MHz 12A
190.640 MHz 7B
225.648 MHz 12B
192.352 MHz 7C
227.360 MHz 12C
194.064 MHz 7D
229.072 MHz 12D
195.936 MHz 8A
230.784 MHz 13A
197.648 MHz 8B
232.496 MHz 13B
199.360 MHz 8C
234.208 MHz 13C
201.072 MHz 8D
235.776 MHz 13D
202.928 MHz 9A
237.488 MHz 13E
204.640 MHz 9B
239.200 MHz 13F
206.352 MHz 9C
208.064 MHz 9D
General
Power requirements: 230 V AC, 50/60 Hz
Power consumption: 65 watts
Dimensions (w/h/d) (excl. speakers):
Approx. 200
Power consumption: 65 watts
Dimensions (w/h/d) (excl. speakers):
Approx. 200
×
132
×
298 mm
Mass (excl. speakers): Approx. 3.7 kg
Design and specications are subject to
change without notice.
change without notice.
3
HCD-BX7DAB
TABLE OF CONTENTS
1.
SERVICING NOTES
...............................................
4
2.
GENERAL
...................................................................
6
3.
DISASSEMBLY
3-1.
Disassembly Flow ...........................................................
7
3-2.
Panel (Side L/R) ..............................................................
7
3-3.
LID (CD) Assy ................................................................
8
3-4.
Panel (Top) ......................................................................
8
3-5.
MAIN Board, Shield Plate (PWB Main) .........................
9
3-6.
DAB Board, Module (DAB Tuner) ................................. 10
3-7.
Front Panel/Headphone Boards, Panel (Front) Assy ....... 10
3-8.
D.C. Fan (M301), Panel (Rear) ....................................... 11
3-9.
Power Transformer (T1) .................................................. 11
3-10. Loading Mechanism Block ............................................. 12
3-11. Base Unit ......................................................................... 12
3-12. Belt .................................................................................. 13
3-13. OP Base Assy (KSM-213D), CD board .......................... 13
3-11. Base Unit ......................................................................... 12
3-12. Belt .................................................................................. 13
3-13. OP Base Assy (KSM-213D), CD board .......................... 13
4.
TEST MODE
.............................................................. 14
5.
ELECTRICAL CHECKS
........................................ 16
6.
DIAGRAMS
6-1.
Block Diagram – CD SERVO Section – ......................... 17
6-2.
Block Diagram – TUNER, USB, DAB Section – ........... 18
6-3.
Block Diagram – MAIN Section – .................................. 19
6-4.
Block Diagram
– PANEL, POWER SUPPLY Section – .......................... 20
– PANEL, POWER SUPPLY Section – .......................... 20
6-5.
Printed Wiring Boards – CD Section – ........................... 22
6-6.
Schematic Diagram – CD Board – .................................. 23
6-7.
Printed Wiring Board – USB Board – ............................. 24
6-8.
Schematic Diagram – USB Board – ................................ 25
6-9.
Printed Wiring Board – DAB Board – ............................. 26
6-10. Schematic Diagram – DAB Board – ............................... 27
6-11. Printed Wiring Boards – REGULATOR Section – ......... 28
6-12. Schematic Diagram – REGULATOR Section – .............. 28
6-13. Printed Wiring Board – MAIN Section – ........................ 29
6-14. Schematic Diagram – MAIN Section (1/4) – .................. 30
6-15. Schematic Diagram – MAIN Section (2/4) – .................. 31
6-16. Schematic Diagram – MAIN Section (3/4) – .................. 32
6-17. Schematic Diagram – MAIN Section (4/4) – .................. 33
6-18. Printed Wiring Board – AMP Board – ............................ 34
6-19. Schematic Diagram – AMP Board – ............................... 35
6-20. Printed Wiring Boards – SPEAKER Section – ............... 36
6-21. Schematic Diagram – SPEAKER Section – .................... 37
6-22. Printed Wiring Boards – PANEL Section – ..................... 38
6-23. Schematic Diagram – PANEL Section – ......................... 39
6-24. Printed Wiring Board – POWER Board – ....................... 40
6-25. Schematic Diagram – POWER Board – .......................... 41
6-11. Printed Wiring Boards – REGULATOR Section – ......... 28
6-12. Schematic Diagram – REGULATOR Section – .............. 28
6-13. Printed Wiring Board – MAIN Section – ........................ 29
6-14. Schematic Diagram – MAIN Section (1/4) – .................. 30
6-15. Schematic Diagram – MAIN Section (2/4) – .................. 31
6-16. Schematic Diagram – MAIN Section (3/4) – .................. 32
6-17. Schematic Diagram – MAIN Section (4/4) – .................. 33
6-18. Printed Wiring Board – AMP Board – ............................ 34
6-19. Schematic Diagram – AMP Board – ............................... 35
6-20. Printed Wiring Boards – SPEAKER Section – ............... 36
6-21. Schematic Diagram – SPEAKER Section – .................... 37
6-22. Printed Wiring Boards – PANEL Section – ..................... 38
6-23. Schematic Diagram – PANEL Section – ......................... 39
6-24. Printed Wiring Board – POWER Board – ....................... 40
6-25. Schematic Diagram – POWER Board – .......................... 41
7.
EXPLODED VIEWS
7-1.
Panel Section ................................................................... 52
7-2.
Front Panel Section ......................................................... 53
7-3.
Main Section .................................................................... 54
7-4.
POWER Board Section ................................................... 55
7-5.
Loading Mechanism Section ........................................... 56
7-6.
Base Unit Section (BU-K6BD90U-WOD) ..................... 57
8.
ELECTRICAL PARTS LIST
................................ 58
4
HCD-BX7DAB
SECTION 1
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.
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.
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.
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
•
Unleaded solder melts at a temperature about 40 ˚C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 ˚C.
Caution: The printed pattern (copper foil) may peel away if
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
•
Strong viscosity
Unleaded solder is more viscou-s (sticky, less prone to flow)
Unleaded solder is more viscou-s (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
occur such as on IC pins, etc.
•
Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
ANTITHEFT UNLOCK MODE
Procedure:
1. Press the
I/
1
button to turn the power on.
2. Press the [CD] button on the remote commander to select “CD”.
3. Press two buttons of [ /CANCEL] and
3. Press two buttons of [ /CANCEL] and
Z
for 5 seconds.
4. The message “UNLOCKED” is displayed on the liquid crystal
display and the disc tray is unlocked.
Note:
When “LOCKED” is displayed, the tray lock is not released by turning
power on/off with the
power on/off with the
I
/1 button.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
BLOCK OR BASE UNIT
x