DOWNLOAD Sony CMT-EH45DAB / HCD-EH45DAB Service Manual ↓ Size: 3.29 MB | Pages: 38 in PDF or view online for FREE

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

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.

Use buttons on the remote to create your own program.

Press CD 

 to select the CD function.

Press PLAY MODE 

 repeatedly until “PGM” appears

while the player is stopped.

Press

/

 repeatedly until the desired 

track number appears.
When programming MP3 files, press

 +/

repeatedly to select the desired folder, and then select
the desired file.

Selected track or file number

Press ENTER 

 to add the track or file to the 

program.

Repeat steps 3 through 4 to program additional 
tracks or files, up to a total of 15 tracks or files.

To play your program of tracks or files, press 

.

The program remains available until you open the CD 
compartment. To play it again, select the CD function,
and then press

.

To cancel Program Play, press PLAY MODE
repeatedly until “PGM” disappears while the player is
stopped.

To delete the last track or file of the program, press
CLEAR

 while the player is stopped.

To view program information, such as total track number
of the program, press DISPLAY

repeatedly.

You can preset your favorite radio stations and tune
them in instantly by selecting the corresponding preset
number.
Use buttons on the remote to preset stations.

Tune in the desired station (see “Listening to the 
radio”).

Press TUNER MEMORY

.

Preset number

Press +/

 repeatedly to select your desired 

preset number.
If another station is already assigned to the selected
preset number, the station is replaced by the new 
stations.

Press ENTER 

.

Repeat steps 1 through 4 to store other stations.
You can preset up to 20 DAB and 20 FM stations. The
preset stations are retained for about half a day even 
if you disconnect the power cord or if a power failure
occurs.

To call up a preset radio station, press TUNING
MODE

 repeatedly until “PRESET” appears, and 

then press +/

 repeatedly to select the desired 

preset number.

You can preset a DAB service only when it can be received.

Use a TYPE I (normal) tape only.

You can record just the portions you like from a sound
source, including connected audio components.

Use buttons on the unit to control tape recording.

Insert a recordable tape into the cassette holder 
with the side you want to record facing forward.

Prepare the recording source.
Select the desired source to record.
Place the disc you want to record.
When recording a folder from an MP3 disc, press
PLAY MODE

on the remote repeatedly to select 

“

,” and then press

 +/

repeatedly to select

the desired folder.
To record only your favorite CD tracks or MP3 files in 
your desired order, perform steps 2 to 5 of “Creating
your own CD program.”

Start recording.
Press   (record)

, and then start playing the 

desired recording source.
The CD starts playing automatically.
If there is noise while recording from the tuner,
reposition the appropriate antenna to reduce the 
noise.
While recording, you cannot listen to other sources.

To stop recording, press

.

We recommend that you press

 first, and then press

 to

avoid noise being recorded when you stop recording.

The system offers two timer functions. If you use both
timers, the Sleep Timer has priority.

Use buttons on the remote to use the timer functions.

You can fall asleep to music. This function works even if 
the clock is not set.
Press SLEEP 

repeatedly. If you select “AUTO,” the 

system automatically turns off after the current disc or
tape stops or in 100 minutes.
If the tape deck is still playing or recording at the set 
time, the system turns off after the tape deck stops.

You can wake up to CD or tuner at a preset time.

Make sure you have set the clock.

Prepare the sound source.
Prepare the sound source, and then press VOLUME
+/

 to adjust the volume.

To start from a specific CD track or MP3 file, create
your own CD program.

Press CLOCK/TIMER SET

.

Press

/

 repeatedly to select “PLAY SET,” 

and then press ENTER 

.

“ON TIME” appears, and the hour indication flashes.

Set the time to start playing.

Press

/

 repeatedly to set the hour, and 

then press ENTER 

.

The minute indication flashes. Use the procedure
above to set the minutes.

Use the same procedure as in step 4 to set the time 
to stop playing.

Select the sound source.
Press /

repeatedly 

until 

the 

desired

sound source appears, and then press ENTER 

. The

display shows the timer settings.

Press

 to turn off the system.

The system turns on 15 seconds before the preset time.
If the system is on at the preset time, the Play Timer
will not play.

To activate or check the timer again, press CLOCK/
TIMER SELECT

, press

/

repeatedly until

“PLAY SEL” appears, and then press ENTER 

.

To cancel a timer, repeat the same procedure as above
until “OFF” appears, and then press ENTER 

.

To change the setting, start over from step 1.

The Play Timer setting remains as long as the setting is not canceled
manually.