CMT-BX5, HCD-CBX5 - Sony Audio Service Manual (repair manual)

cmt-bx5, hcd-cbx5 service manual
Model
CMT-BX5 HCD-CBX5
Pages
58
Size
4.41 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
cmt-bx5-hcd-cbx5.pdf
Date

Read Sony CMT-BX5 / HCD-CBX5 Service Manual online

SERVICE MANUAL
Sony Corporation
Audio Business Group
Published by Sony Techno Create Corporation
HCD-CBX5
SPECIFICATIONS
COMPACT DISC RECEIVER
9-889-060-01
2008C05-1
© 
2008.03
AEP Model
Ver. 1.0  2008.03
Model Name Using Similar Mechanism
HCD-CBX3
Base Unit Name
BU-K6BD90U-WOD
Optical Pick-up Block Name
KSM-213DCP
•  HCD-CBX5 is the amplifi er, USB, CD player and 
tuner section in CMT-BX5.
•  “WALKMAN” and “WALKMAN” logo are registered trademarks of 
Sony Corporation.
•  MICROVAULT is a trademark of Sony Corporation.
•  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)
Inputs:
AUDIO IN (stereo mini jack): 
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
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
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
CD player section
System: Compact disc and digital audio 
system
Laser Diode Properties
Emission duration: continuous
Laser Output*: Less than 44.6μW
* 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.
Frequency response: 20 Hz – 20 kHz
Signal-to-noise ratio: More than 90 dB
Dynamic range: More than 90 dB
Tuner section
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
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
General
Power requirements
230 V AC, 50/60 Hz
Power consumption: 65 watts
Dimensions (w/h/d) (excl. speakers): 
Approx. 200 × 132 × 298 mm
Mass (excl. speakers): 3.7 kg
Design and specifications are subject to 
change without notice.
HCD-CBX5
2
1. 
SERVICING  NOTES
  .............................................   3
2. GENERAL
  ..................................................................   4
3. DISASSEMBLY
3-1. Disassembly 
Flow 
...........................................................   6
3-2.  Panel (Side L/R) ..............................................................   7
3-3. Panel 
(Top) 
......................................................................   7
3-4.  MAIN Board, Shield Plate (PWB Main) ........................   8
3-5. Lid 
(CD) 
Assy 
.................................................................   9
3-6.  FRONT PANEL Board, Panel (Front) Assy ...................   9
3-7.  Power Cord, D.C. Fan (M301), Panel (Rear) .................   10
3-8. Power 
Transformer 
(T901) 
.............................................  10
3-9.  Loading Mechanism Block .............................................   11
3-10. Base Unit .........................................................................   11
3-11. Belt ..................................................................................  12
3-12.  Op Base Assy (KSM-213D) ...........................................   12
4. 
TEST  MODE 
 ............................................................   13
5. 
ELECTRICAL  CHECK 
 .........................................   13
6. DIAGRAMS
6-1.  Block Diagram - CD SERVO Section - ..........................   14
6-2.  Block Diagram - TUNER, USB, MAIN Section - ..........   15
6-3. Block 
Diagram 
 
- PANEL, POWER SUPPLY Section - ...........................   16
6-4.  Printed Wiring Boards - CD Section - ............................   18
6-5.  Schematic Diagram - CD Board - ...................................   19
6-6.  Printed Wiring Board - USB Board - ..............................   20
6-7.  Schematic Diagram - USB Board - .................................   21
6-8.  Printed Wiring Boards - REGULATOR Section - ..........   22
6-9.  Schematic Diagram - REGULATOR Section - ..............   22
6-10.  Printed Wiring Board - MAIN Board - ...........................   23
6-11.  Schematic Diagram - MAIN Section (1/4) - ...................   24
6-12.  Schematic Diagram - MAIN Section (2/4) - ...................   25
6-13.  Schematic Diagram - MAIN Section (3/4) - ...................   26
6-14.  Schematic Diagram - MAIN Section (4/4) - ...................   27
6-15.  Printed Wiring Board - AMP Board - .............................   28
6-16.  Schematic Diagram - AMP Board - ................................   29
6-17.  Printed Wiring Boards - SPEAKER Section - ................   30
6-18.  Schematic Diagram - SPEAKER Section - ....................   31
6-19.  Printed Wiring Boards - PANEL Section - .....................   32
6-20.  Schematic Diagram - PANEL Section - ..........................   33
6-21.  Printed Wiring Board - POWER Board - ........................   34
6-22.  Schematic Diagram - POWER Board - ..........................   35
7. 
EXPLODED  VIEWS
7-1.  Panel Section  ..................................................................   43
7-2.  Front Panel Section  ........................................................   44
7-3. Main 
Section 
 
..................................................................  45
7-4.  POWER Board Section  ..................................................   46
7-5.  Loading Mechanism Section ..........................................   47
7-6.  Base Unit Section (BU-K6BD90U-WOD)  ....................   48
8. 
ELECTRICAL  PARTS  LIST
  ..............................   49
TABLE  OF  CONTENTS
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 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.
SAFETY-RELATED COMPONET 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.
CAUTION
Use of controls or adjustments or performance of procedures other than 
those specifi ed herein may result in hazardous radiation exposure.
This appliance is classified as a CLASS 1 
LASER product. This marking is located 
on the rear exterior.
HCD-CBX5
3
SECTION  1
SERVICING  NOTES
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 
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 the 
heated tip is applied for too long, so be careful!
• Strong 
viscosity
 
Unleaded solder is more viscous (sticky, less prone to fl ow) 
than ordinary solder so use caution not to let solder bridges 
occur such as on IC pins, etc.
•  Usable with ordinary solder
 
It is best to use only unleaded solder but unleaded solder may 
also be added to ordinary solder.
NOTES ON HANDLING THE OPTICAL PICK-UP 
BLOCK   OR  BASE  UNIT
The laser diode in the optical pick-up block may suffer electrostat-
ic 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 fl exible 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 refl ective surface by the objective lens in the optical 
pickup block. Therefore, when checking the laser diode emission, 
observe from more than 30 cm away from the objective lens.
ANTITHEFT  UNLOCK  MODE
Procedure:
1.  Press the [
?
/
1
] button to turn the power on.
2.  Press the [CD] button on the remote commander to select 
“CD”.
3.  Press two buttons of [
x
/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
 [
?
/
1
button.
 Push the boss. 
 Open the tray.
 Insert the driver.
HOW  TO  OPEN  THE  TRAY  WHEN  POWER  SWITCH  TURN  OFF
HCD-CBX5
4
SECTION  2
GENERAL
This section is extracted 
from instruction manual.
Guide to parts and controls
This manual mainly explains operations using the remote, but the same operations can 
also be performed using the buttons on the unit having the same or similar names.
Unit
Front panel
Top panel
Remote
/ (power) button
Press to turn on the system.
STANDBY indicator
Lights up when the system is turned off.
Remote sensor
 (open/close) button
Press to open or close the disc tray.
USB MEMORY indicator
Lights up when an optional USB device 
(Digital music player or USB storage 
media) is connected.
AUDIO IN jack
Connect to an optional audio 
component.
PHONES jack
Connect the headphones.
 (USB) port
Connect to an optional USB device 
(Digital music player or USB storage 
media).
Playback buttons and function 
buttons
Unit: USB 
 (play/pause) 
button
Press to select the USB function.
Press to start or pause playback of an 
optional USB device (Digital music 
player or USB storage media).
Remote: USB button
Press to select the USB function.
Unit: CD 
 (play/pause) 
button
Press to select the CD function.
Press to start or pause playback of a disc.
Remote: CD button
Press to select the CD function.
Remote: 
 (play) button, 
 (pause) button 
Press to start or pause playback.
TUNER/BAND button
Press to select the TUNER function. 
Press to select FM or AM reception 
mode.
Unit: AUDIO IN button
Press to select the AUDIO IN function.
Remote: FUNCTION button
Press to select the function.
DISPLAY button
Press to change the information on the 
display.
PLAY MODE/TUNING MODE 
button
Press to select the play mode of a CD, 
MP3 disc or an optional USB device 
(Digital music player or USB storage 
media).
Press to select the tuning mode.
Sound buttons
Unit: DSGX button
Remote: EQ button
Press to select the sound effect.
Unit:
/CANCEL (stop/cancel) 
button
Remote: 
 (stop) button
Press to stop playback.
ENTER button
Press to enter the settings.
/ (go back/go forward) 
button
Press to select a track or file.
Unit: TUNE +/– (tuning) button 
Remote: +/– (tuning) button
Press to tune in the desired station.
 +/– (select folder) button 
Press to select a folder.
/ (rewind/fast forward) 
button
Press to find a point in a track or file.
Unit: VOL +/– button
Remote: VOLUME +/– button 
Press to adjust the volume.
CLOCK/TIMER SELECT button 
CLOCK/TIMER SET button
Press to set the clock and the Play Timer.
REPEAT/FM MODE button
Press to listen to a disc, a single track or 
file repeatedly.
Press to select the FM reception mode 
(monaural or stereo).
Battery compartment lid 
CLEAR button
Press to delete a pre-programmed track 
or file.
TUNER MEMORY button
Press to preset the radio station.
SLEEP button
Press to set the Sleep Timer.
Page of 58
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