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2008D05-1

© 

2008.04

•  HCD-EH45DAB is the amplifi er, CD player, tape 

deck and tuner section in CMT-EH45DAB.

CD 
Section

Model Name Using Similar Mechanism

HCD-EH15

Base Unit Name

BU-K8BD90-WOD

Optical Pick-up Name

KSM-213CDP

Tape 
Section

Model Name Using Similar Mechanism

HCD-EH15

Tape Transport Mechanism Type

MF-EH10

DIN power output (rated): 4 + 4 W (4 ohms at 1 kHz, DIN)
Continuous RMS power output (reference): 5 + 5 W (4 ohms at 1 kHz, 
10% THD)
Music power output (reference): 7 + 7 W

Inputs

AUDIO IN (stereo mini jack): Sensitivity 800 mV, impedance 47 kilohms

Outputs

PHONES (stereo mini jack): Accepts headphones with an impedance of
8 ohms or more
SPEAKER: Accepts impedance of 4 ohms

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 200 mm from the 

objective lens surface on the Optical Pick-up Block with 7 mm aperture.

Frequency response: 20 Hz

 20 kHz

Signal-to-noise ratio: More than 90 dB
Dynamic range: More than 90 dB

Recording system: 4-track 2-channel, stereo

FM/DAB stereo tuner
Antenna:

FM/DAB lead antenna

FM tuner section:

Tuning range: 87.5   108.0 MHz (50 kHz step)
Intermediate frequency: 10.7 MHz

DAB tuner section:

Frequency range
Band-III: 174.928 (5A)   239.200 (13F) MHz
* For details, see “DAB frequency table” below.

DAB frequency table (Band-III)

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

* Frequencies are displayed to two decimal places on this system.

Power requirements: AC 230 V, 50/60 Hz
Power consumption: 25 W
Dimensions (w/h/d) (excl. speakers): Approx. 155 × 241 × 224.6 mm
Mass (excl. speakers): Approx. 2.2 kg

Design and specifications are subject to change without notice.

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

3

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

4

3-1. Disassembly 

Flow 

...........................................................   6

3-2.  Rear Cabinet Block .........................................................   6
3-3.  Front Cabinet Block, Top Cabinet Block, 
 MAIN 

Board 

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

7

3-4.  MF-EH10 (Tape Mechanism Deck), Cassette Lid ..........   7
3-5.  Base Unit Block (BU-K8BD90-WOD) ..........................   8
3-6.  Optical Pick-up Block (KSM-213CDP) .........................   8

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

9

 ......................   10

........................  10

7-1.  Printed Wiring Board - CD Board - ................................   14
7-2.  Schematic Diagram - CD Board - ...................................   15
7-3.  Printed Wiring Board - PANEL Board - .........................   16
7-4.  Schematic Diagram - PANEL Board - ............................   17
7-5.  Schematic Diagram - MAIN Section (1/2) - ...................   18
7-6.  Schematic Diagram - MAIN Section (2/2) - ...................   19
7-7.  Printed Wiring Boards - MAIN Section - .......................   20

8-1. Overall 

Section 

...............................................................  26

8-2.  Front Cabinet Section .....................................................   27
8-3.  Top Cabinet Section ........................................................   28
8-4.  Base Unit Section (BU-K8BD90-WOD) ........................   29

  ..............................   30

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.

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 

This appliance is classified
as a CLASS 1 LASER
product. This marking 
is located on the rear
exterior.

CAUTION
Use of controls or adjustments or performance of procedures other than 
those specifi ed herein may result in hazardous radiation exposure.

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)

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.

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.

LASER  DIODE  AND  FOCUS  SEARCH  OPERATION  
CHECK
During normal operation of the equipment, emission of the laser
diode is prohibited unless the upper lid is closed while turning on 
the SW750. (push switch type)
The following checking method for the laser diode is operable.
• Method
  Emission of the laser diode is visually checked.
  1.  Open the upper lid.
  2.  Push the SW750 as shown in Fig.1.

 Note:  Do not push the detection lever strongly, or it may be bent or 

damaged.

  3.  Check the object lens for confi rming normal emission of the 

laser diode. If not emitting, there is a trouble in the automatic 
power control circuit or the optical pick-up.

    In this operation, the object lens will move up and down 2 

times along with inward motion for the focus search.

This section is extracted 
from instruction manual.

Open the tape 
section lid.

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.

To use the remote
Slide and remove the battery compartment lid 

, and 

insert the two R6 (size AA) batteries (not supplied),
side first, matching the polarities shown below.

With normal use, the batteries should last for about six months.
Do not mix an old battery with a new one or mix different types of
batteries.
If you do not use the remote for a long period of time, remove the 
batteries to avoid damage from battery leakage and corrosion.

To set the clock
Use buttons on the remote to set the clock.

Turn on the system.
Press  

(on/standby)

.

Select the clock set mode.
Press CLOCK/TIMER SET

. If the current mode 

appears, press 

/

repeatedly to select

“CLOCK,” and then press ENTER 

.

Set the time.
Press 

/

repeatedly to set the hour, and 

then press ENTER 

. Use the same procedure to set 

the minutes.
The clock settings are lost when you disconnect the
power cord or if a power failure occurs.

To run the DAB Automatic Scan
When you turn on the system for the first time after 
you purchase the system, DAB Automatic Scan starts
automatically and creates a list of available services. If
you want to run the DAB Automatic Scan again, perform
the procedure below.

Press DAB AUTO SCAN 

 on the unit.

“DAB SCAN” and “PUSH DAB” appear.

Press DAB

 on the unit.

Scanning begins. The scanning progress is indicated
by advancing asterisks. Depending on the DAB
services available in your area, scanning may take a 
few minutes.

When scanning is complete, a list of available services
is created.

If your country or region does not support DAB broadcast, 
“NO SERV” appears.
Do not press any button on the unit or the remote during DAB
Automatic Scan. If scanning is interrupted, run the DAB Automatic
Scan again.
If you move to another area, repeat this procedure to store the 
stations for your new area.
This procedure clears all previously stored presets.
Before unplugging the DAB antenna, make sure the system is turned
off to preserve your own DAB settings.
This tuner does not support data services.

Press the following buttons (or press FUNCTION
repeatedly).

CD

CD

.

Tuner

TUNER/BAND

.

DAB

DAB

on the unit.

Tape

FUNCTION
repeatedly until “TAPE”
appears.

Component* (connected
using an audio cord)

AUDIO IN 

.

* If the component has the AVLS (Automatic Volume Limiter System) 

or BASS BOOST function, turn off the function to avoid distorted
sound from the speakers.

To adjust the volume
Press VOLUME +/  (or turn the VOLUME control on
the unit)

.

Generate a more dynamic 
sound (Dynamic Sound
Generator X-tra)

DSGX

on the unit.

Set the sound effect

EQ

.

Select the CD function.
Press CD (or FUNCTION repeatedly)

.

Place a disc.
Press  PUSH OPEN/CLOSE on the unit, and place a 
disc with the label side up on the CD compartment.
To close the CD compartment, press

PUSH OPEN/

CLOSE on the unit.

PUSH OPEN/CLOSE

Start playback.
Press 

 (play) (or CD/

 (play/pause) on the unit)

.

Pause playback

 (pause) (or CD/

on the 

unit)

. To resume play, press

it again.

Stop playback

 (stop)

.

Select a folder on an
MP3 disc

 +/  (select folder) 

.

Select a track or file

/

 (go back/go forward) 

(

/

on the unit)

.

Find a point in a 
track or file

Hold down

/

 (rewind/

fast forward) 

during playback,

and release it at the desired point.

Select Repeat Play

REPEAT

repeatedly until

“REP” or “REP1” appears.

To change the play mode
Press PLAY MODE

repeatedly while the player is

stopped. You can select normal play (“

” for all MP3 

files in the folder on the disc), shuffle play (“SHUF” or
“

 SHUF*”), or program play (“PGM”).

* When playing a CD-DA disc, 

 (SHUF) Play performs the same

operation as SHUF Play.

All tracks or files on a disc are played repeatedly up to five times.

 “REP1” indicates that a single track or file is repeated until you stop

it.

Do not save other types of tracks or files or unnecessary folders on a 
disc that has MP3 files.
Folders that have no MP3 files are skipped.
MP3 files are played back in the order that they are recorded onto
the disc.
The system can only play MP3 files that have a file extension of
“.MP3”.
If there are files on the disc that have the “.MP3” file extension,
but that are not MP3 files, the unit may produce noise or may
malfunction.
The maximum number of:

folders is 150 (including the root folder).
MP3 files is 255.
MP3 files and folders that can be contained on a single disc is 256.
folder levels (the tree structure of files) is 8.

Compatibility with all MP3 encoding/writing software, recording
device, and recording media cannot be guaranteed. Incompatible 
MP3 discs may produce noise or interrupted audio or may not play
at all.

If the disc begins with a CD-DA (or MP3) session, it is recognized
as a CD-DA (or MP3) disc, and playback continues until another
session is encountered.
A disc with a mixed CD format is recognized as a CD-DA (audio)
disc.

Before you can receive DAB, you must complete the 
DAB Automatic Scan procedure (see “Before using the 
system”).

Select “DAB” or “FM.”
Press TUNER/BAND

repeatedly. You can also

select DAB directly by pressing DAB

on the unit.

Select the tuning mode.
Press TUNING MODE

repeatedly until “AUTO”

appears.

Tune in the desired station.
Press +/  (or TUNING +/

on the unit)

.

Scanning stops automatically when a station is tuned 
in, and then “TUNED” (DAB only) and “STEREO”
(for stereo programs) appear. When you tune in a 
DAB station or an FM station that provides RDS 
services, the service name or station name appears.

Press   (stop)

 to stop automatic scanning (FM band only).

(FM band only)
Press TUNING MODE

repeatedly until “MANUAL”

appears, and then press +/  (or TUNING +/

on the 

unit)

repeatedly to tune in the desired station.

station
Press FM MODE

repeatedly until “MONO” appears 

to turn off stereo reception.

When tuning in a DAB station, it may take a few seconds before you 
hear any sound.
Primary service is automatically received when secondary service
ends.

Use buttons on the unit to play a tape.

Select the tape function.
Press FUNCTION

repeatedly.

Insert a tape.
Press 

 (stop/eject) 

, and insert the tape into the 

cassette holder. Make sure there is no slack in the tape
to avoid damaging the tape or the tape deck.

Start playback.
Press 

 (play)

.

Pause playback

 (pause)

. To resume play, press

it again.

Stop playback

 (stop/eject) 

.

Rewind or fast
forward*

/

 (rewind/fast forward) 

.

* Be sure to press

 (stop/eject) 

 after the tape has been wound 

or rewound to the end.

Do not turn off the system during playback or recording.

Information on
the display

1)

DISPLAY

repeatedly when the 

system is on.

Display mode 
(Clock)

DISPLAY

 when the system is

off

2)

. The clock is displayed for eight

seconds.

1)

For example, you can view:

CD/MP3 disc information such as the track or file number, folder 
name during normal play, or the total play time while the player is
stopped.
 DAB station information such as the service name, channel label,
DLS (Dynamic Label Segment), or ensemble label.

2)

The STANDBY indicator

 lights up when the system is turned off.

The following are not displayed;

total playing time for a CD-DA disc depending on the play mode.
total playing time for an MP3 disc.
remaining playing time for a track and an MP3 file.

The following are not displayed correctly;

elapsed playing time of an MP3 file encoded using VBR (variable 
bit rate).
folder and file names that do not follow either ISO9660 Level 1, 
Level 2 or Joliet in the expansion format.

The following are displayed;

ID3 tag information for MP3 files when ID3 version 1 and 
version 2 tags are used.
up to 15 characters of ID3 tag information using uppercase letters
(A to Z), numbers (0 to 9), and symbols (" $ % ’ ( ) * + , – . / < = > 
@ [ \ ] _ ` { | } ! ? ^).
up to 8 characters of service name, up to 128 characters of DLS 
(Dynamic Label Segment) and up to 16 characters of ensemble 
label using uppercase letters (A to Z), numbers (0 to 9), and 
symbols (" $ % ’ ( ) * + , – . / < = > @ [ \ ] _ ` { | } ! ? ^).

To connect an optional headphones
Connect headphones to the PHONES jack

on the 

unit.

To connect an optional component
Connect additional audio source component to the 
AUDIO IN jack

on the unit using an audio analog 

cord (not supplied). Turn down the volume on the 
system, and then select the AUDIO IN function.