CMT-BX1, CMT-BX3, CMT-BX5BT, HCD-BX5BT, HCD-CBX1, HCD-CBX3 — Sony Audio Service Manual (repair manual)

Photo: HCD-BX5BT

– Continued on next page –

2009D05-1
© 2009.04

US Model

HCD-BX5BT/CBX1

Canadian Model

HCD-BX5BT/CBX1/CBX3

AEP Model

UK Model

E Model

Australian Model

Chinese Model

HCD-CBX3

•

HCD-BX5BT is the amplifier, bluetooth, CD player
and tuner section in CMT-BX5BT.

•

HCD-CBX1 is the amplifier, CD player and tuner
section in CMT-BX1

•

HCD-CBX3 is the amplifier, USB, CD player and
tuner section in CMT-BX3.

Model Name Using Similar Mechanism

NEW

Base Unit Name

HCD-BX5BT/CBX1

BU-K6BD90-WOD

HCD-CBX3

BU-K6BD90U-WOD

Optical Pick-up Block Name

KSM-213DCP

• “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.

AUDIO POWER SPECIFICATIONS POWER OUTPUT
AND TOTAL HARMONIC DISTORTION (BX5BT: US
/CBX1: US models):
With 6 ohm loads, both channels driven, from 120 –
10,000Hz; rated 12 watts per channel minimum RMS
power, with no more than 10% total harmonic distortion
from 250 milliwatts to rated output.

Amplifier section
BX5BT/CBX1:

Continuous RMS power output
(reference): 15 + 15 watts (6 ohms at 1 kHz, 10%
THD)

Inputs:

AUDIO IN (stereo mini jack):
voltage 250 mV, impedance 47 kilohms

Outputs:

PHONES (stereo mini jack): accepts he/adphones of
8 ohms or more
SPEAKER: accepts impedance of 6 to 16 ohms

CBX3:

Canadian model:

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)

European model:

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)

Chinese model:

DIN power output (rated):
15 + 15 watts (6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
20 + 20 watts (6 ohms at 1 kHz, 10% THD)

Other models:

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)

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

Communication system:

Bluetooth Standard version 2.0

Output:

Bluetooth Standard Power Class 2

Maximum communication range:

Line of sight approx. 10 m

1)

Frequency band:

2.4 GHz band (2.4000 GHz – 2.4835 GHz)

Modulation method:

FHSS

Compatible Bluetooth profiles

2)

:

A2DP (Advanced Audio Distribution Profile)
AVRCP (Audio Video Remote Control Profile)

Supported codecs:

Receive: SBC (Sub Band Codec), MP3
Transmit: SBC (Sub Band Codec)

1)

The actual range will vary depending on factors such
as obstacles between devices, magnetic fields around
a microwave oven, static electricity, reception
sensitivity, antenna’s performance, operating system,
software application, etc.

2)

Bluetooth standard profiles indicate the purpose of
Bluetooth communication between devices.

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

System: Compact disc and digital audio
system

2

Laser Diode Properties

Emission duration: continuous
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.

Frequency response: 20 Hz – 20 kHz
Signal-to-noise ratio: More than 90 dB
Dynamic range: More than 90 dB

Tuner section
CBX3:

FM stereo, FM/AM superheterodyne tuner

FM tuner section:

Tuning range:

Canadian model:
87.5 – 108.0 MHz (100 kHz step)
Other models:
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:

Canadian model:
530 – 1,710 kHz (with 10 kHz tuning interval)
531 – 1,710 kHz (with 9 kHz tuning interval)
European model:
531 – 1,602 kHz (with 9 kHz tuning interval)
Other models:
530 – 1,710 kHz (with 10 kHz tuning interval)
531 – 1,602 kHz (with 9 kHz tuning interval)

Antenna: AM loop antenna, external antenna terminal
Intermediate frequency: 450 kHz

BX5BT/CBX1:

FM stereo, FM/AM superheterodyne tuner

FM tuner section:

Tuning range

87.5 – 108.0 MHz (100 kHz step)

Antenna: FM lead antenna
Antenna terminals: 75 ohms unbalanced
Intermediate frequency: 10.7 MHz

AM tuner section:

Tuning range

530 – 1,710 kHz (with 10 kHz tuning interval)
531 – 1,710 kHz (with 9 kHz tuning interval)

Antenna: AM loop antenna, external antenna terminal
Intermediate frequency: 450 kHz

Power requirements:
120 V AC, 60 Hz (BX5BT/CBX1/CBX3: Canadian
model)
230 V AC, 50/60 Hz (CBX3: European model)
230 – 240 V AC, 50/60 Hz (CBX3: Australian model)
220 V AC, 60 Hz (CBX3: Korean model)
120 V AC, 50/60 Hz (CBX3: Taiwan model)
220 V AC, 50/60 Hz (CBX3: Chinese model)
120 V, 220 V, 230 V – 240 V AC, 50/60 Hz, adjustable
with voltage selector (CBX3: Other models)
Power consumption:
40 watts (BX5BT/CBX1)
65 watts (CBX3)
Dimensions (w/h/d) (excl. speakers):
Approx. 200 

×

 132 

×

 298 mm

Mass (excl. speakers):
3.5 kg (BX5BT)
3.4 kg (CBX1)
3.7 kg (CBX3)

Design and specifications are subject to change without
notice.

•

Never reuse a disconnected chip component.

•

Notice that the minus side of a tantalum capacitor may be
damaged by heat.

•

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.

Use of controls or adjustments or performance of procedures
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.

This appliance is 

 0

0

0

3

After correcting the original service problem, perform the following
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.

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” 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 2 V AC range are suitable.  (See
Fig. A)

1.5 k

Ω

0.15 

µ

F

AC
voltmeter
(0.75 V)

To Exposed Metal
Parts on Set

Earth Ground

...............................................

4

...................................................................

6

3-1.

Disassembly Flow ........................................................... 10

3-2.

Panel (Side L/R) .............................................................. 11

3-3.

Panel (Top) ...................................................................... 11

3-4.

MAIN Board, Shield Plate (PWB MAIN) ...................... 12

3-5.

BT Board (BX5BT only) ................................................. 13

3-6.

Lid (CD) Assy ................................................................. 13

3-7.

Panel (Front) Assy ........................................................... 14

3-8.

D.C. Fan (M301), Panel (Rear) ....................................... 14

3-9.

POWER Transformer (T1) .............................................. 15

3-10. Loading Mechanism Block ............................................. 15
3-11. Base Unit ......................................................................... 16
3-12. Belt .................................................................................. 16
3-13. OP Base Assy (KSM-213D) ............................................ 17

.............................................................. 18

........................................ 20

6-1.

Block Diagram – CD SERVO Section – ......................... 21

6-2.

Block Diagram
– TUNER, USB, BLUETOOTH Section – ..................... 22

6-3.

Block Diagram – MAIN Section – .................................. 23

6-4.

Block Diagram
– PANEL, POWER SUPPLY Section – .......................... 24

6-5.

Printed Wiring Boards – CD Section – ........................... 26

6-6.

Schematic Diagram – CD Board – .................................. 27

6-7.

Printed Wiring Board – USB Board (CBX3) – ............... 28

6-8.

Schematic Diagram – USB Board (CBX3) – .................. 29

6-9.

Printed Wiring Boards
– BLUETOOTH Section (BX5BT) – .............................. 30

6-10. Schematic Diagram

– BLUETOOTH Section (BX5BT) – .............................. 31

6-11. Printed Wiring Boards – REGULATOR Section – ......... 32
6-12. Schematic Diagram – REGULATOR Section – .............. 32
6-13. Printed Wiring Board – MAIN Board – .......................... 33
6-14. Schematic Diagram – MAIN Section (1/4) – .................. 34
6-15. Schematic Diagram – MAIN Section (2/4) – .................. 35
6-16. Schematic Diagram – MAIN Section (3/4) – .................. 36
6-17. Schematic Diagram – MAIN Section (4/4) – .................. 37
6-18. Printed Wiring Board – AMP Board – ............................ 38
6-19. Schematic Diagram – AMP Board – ............................... 39
6-20. Printed Wiring Boards – SPEAKER Section – ............... 40
6-21. Schematic Diagram – SPEAKER Section – .................... 41
6-22. Printed Wiring Boards – PANEL Section – ..................... 42
6-23. Schematic Diagram – PANEL Section – ......................... 43
6-24. Printed Wiring Board – POWER Board – ....................... 44
6-25. Schematic Diagram – POWER Board – .......................... 45

7-1.

Panel Section ................................................................... 56

7-2.

Front Panel Section ......................................................... 57

7-3.

Main Section .................................................................... 58

7-4.

POWER Board Section ................................................... 59

7-5.

Loading Mechanism Section ........................................... 60

7-6.

Base Unit Section
(BU-K6BD90-WOD: BX5BT/CBX1)
(BU-K6BD90U-WOD: CBX3) ....................................... 61

................................ 62

Refer to SUPPLEMENT-3 for the VOLTAGE SELECTOR board of
printed wiring board, schematic diagram and electrical parts list of
HCD-CBX3: Singapore model.

Refer to SUPPLEMENT-3 for the POWER board of printed wiring
board, schematic diagram and electrical parts list of HCD-CBX3:
Singapore model.
When repairing the set of except HCD-CBX3: Singapore model,
refer to either of original service manual/SUPPLEMENT-1
according to the set.

Refer to SUPPLEMENT-1 for the POWER board of printed wiring
board, schematic diagram and electrical parts list of HCD-BX5BT:
Canadian/CBX1: Canadian/CBX3: Chinese models.
Refer to SUPPLEMENT-2 for the AMP, MAIN and SPEAKER
boards of printed wiring board, schematic diagram and electrical
parts list of HCD-BX5BT: Canadian/CBX1: Canadian/CBX3:
Chinese models.
Refer to SUPPLEMENT-4 for the USB board of printed wiring board,
schematic diagram and electrical parts list of HCD-CBX3: Chinese
model.
When repairing the set of except HCD-BX5BT: Canadian/CBX1:
Canadian/CBX3: Chinese models, refer to either of original service
manual/SUPPLEMENT-1/SUPPLEMENT-2/SUPPLEMENT-3/
SUPPLEMENT-4 according to the set.

4

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.

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.

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)

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 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.

•

Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may

also be added to ordinary solder.

1. Press the

I/

1

button to turn the power on.

2. Press the [FUNCTION] button to select “CD” (BX5BT/CBX1).

Press the [CD] button on the remote commander to select “CD”

(CBX3).

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.

When “LOCKED” is displayed, the tray lock is not released by turning
power on/off with the

I

/1 button.

Model Name

Part No.

HCD-CBX1: US model

3-100-164-0[]

HCD-CBX3: Canadian model

3-106-894-0[]

HCD-CBX3: AEP and UK models

3-106-895-0[]

HCD-CBX3: Singapore model

3-106-896-0[]

HCD-CBX3: Australian model

3-106-897-0[]

HCD-CBX3: Korean model

3-106-898-0[]

HCD-CBX3: Taiwan model

3-106-900-0[]

HCD-BX5BT: US model

3-106-906-0[]

HCD-CBX3: Chinese model

3-270-500-0[]

HCD-BX5BT: Canadian model

3-274-595-0[]

HCD-CBX1: Canadian model

3-288-861-0[]

Part No.

x