Read Sony CMT-EH20DAB / HCD-EH20DAB Service Manual online
SERVICE MANUAL
COMPACT DISC DECK RECEIVER
HCD-EH20DAB
Ver. 1.1 2006.07
SPECIFICATIONS
9-887-310-02
2006G05-1
© 2006.07
© 2006.07
Sony Corporation
Personal Audio Division
Published by Sony Techno Create Corporation
Published by Sony Techno Create Corporation
AEP Model
UK Model
•
HCD-EH20DAB is the amplifier, CD player, tape deck
and tuner section in CMT-EH20DAB.
and tuner section in CMT-EH20DAB.
Model Name Using Similar Mechanism
NEW
CD Section
Base Unit Name
BU-K8BD83S2-WOD
Optical Pick-up Block Name
KSM-213CDP
TAPE Section
Model Name Using Similar Mechanism
HCD-EH10
Tape Transport Mechanism Type
H-21SB
Main unit
Amplier section
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
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
ohms or more
SPEAKER: Accepts impedance of 4 ohms
CD player section
System: Compact disc and digital audio system
Laser Diode Properties
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.
Frequency response: 20 Hz – 20 kHz
Tape deck section
Recording system: 4-track 2-channel, stereo
Tuner section
FM/DAB stereo tuner
Antenna: FM/DAB lead antenna
Antenna: FM/DAB lead antenna
FM tuner section:
Tuning range: 87.5 – 108.0 MHz (50 kHz step)
DAB tuner section:
Frequency range
Band-III: 174.928 (5A) – 239.200 (13F) MHz
* For details, see “DAB frequency table” below.
Band-III: 174.928 (5A) – 239.200 (13F) MHz
* For details, see “DAB frequency table” below.
Frequency
Label
Frequency
Label
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.
General
Power requirements: AC 230 V, 50/60 Hz
Power consumption: 25 W
Power consumption: 25 W
1.0 W (in Power off )
Dimensions (w/h/d) (excl. speakers): Approx. 158
×
241.5
×
233 mm
Mass (excl. speakers): Approx. 2.4 kg
Design and specications are subject to change without notice.
DAB frequency table (Band-III)
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
2
HCD-EH20DAB
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.
Flexible Circuit Board Repairing
•
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.
1.
SERVICING NOTES
...............................................
3
2.
GENERAL
...................................................................
4
3.
DISASSEMBLY
3-1.
Disassembly Flow ...........................................................
6
3-2.
Rear Cabinet Section .......................................................
6
3-3.
Front Cabinet Section, Top Cabinet Section and
MAIN Board ....................................................................
MAIN Board ....................................................................
7
3-4.
Mechanical Deck (H-21SB) ............................................
7
3-5.
Base Unit Section (BU-K8BD83S2-WOD) ....................
8
3-6.
Optical Pick-up Block (KSM-213CDP) ..........................
8
4.
TEST MODE
..............................................................
9
5.
MECHANICAL ADJUSTMENTS
....................... 10
6.
ELECTRICAL ADJUSTMENTS
......................... 10
7.
DIAGRAMS
7-1.
Block Diagram
– CD SERVO, DAB TUNER Section – .......................... 13
– CD SERVO, DAB TUNER Section – .......................... 13
7-2.
Block Diagram – MAIN Section – .................................. 14
7-3.
Printed Wiring Board – CD Board – ............................... 16
7-4.
Schematic Diagram – CD Board – .................................. 17
7-5.
Printed Wiring Boards – MAIN Section – ...................... 19
7-6.
Schematic Diagram – MAIN Section (1/2) – .................. 20
7-7.
Schematic Diagram – MAIN Section (2/2) – .................. 21
7-8.
Printed Wiring Boards – DAB Section – ......................... 22
7-9.
Schematic Diagram – DAB Section – ............................. 23
7-10. Printed Wiring Board – PANEL Board – ........................ 24
7-11. Schematic Diagram – PANEL Board – ........................... 25
7-11. Schematic Diagram – PANEL Board – ........................... 25
8.
EXPLODED VIEWS
8-1.
Overall Section ................................................................ 32
8-2.
Front Cabinet Section ...................................................... 33
8-3.
Top Cabinet Section ........................................................ 34
8-4.
Base Unit Section (BU-K8BD83S2-WOD) .................... 35
9.
ELECTRICAL PARTS LIST
................................ 36
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.
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.
The following caution label is located inside the unit.
CLASS 1 LASER PRODUCT
LUOKAN 1 LASER LAITE
KLASS 1 LASER APPARA
T
This appliance is classified
as a CLASS 1 LASER
product.
as a CLASS 1 LASER
product.
This label is located on the
rear exterior.
rear exterior.
TABLE OF CONTENTS
3
HCD-EH20DAB
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
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
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.
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.
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
BLOCK OR BASE UNIT
Fig.1 Method to push the SW750
SW750
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.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
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.
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.
Emission of the laser diode is visually checked.
1. Open the upper lid.
2. Push the SW750 as shown in Fig.1.
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. Press the
CD
u
button.
4. Check the object lens for confirming normal emission of the
laser diode. If not emitting, there is a trouble in the automatic
power control circuit or the optical pick-up.
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.
4
HCD-EH20DAB
SECTION 2
GENERAL
This section is extracted from
instruction manual.
instruction manual.
Basic Operations
Open the tape
section lid.
section lid.
Before using the system
To use the remote
Slide and remove the battery compartment lid qj, and
insert the two R6 (size AA) batteries (not supplied),
side first, matching the polarities shown below.
insert the two R6 (size AA) batteries (not supplied),
side first, matching the polarities shown below.
Notes on using the remote
• 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
• 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
1
Turn on the system.
Press
(power)
.
2
Select the clock set mode.
Press CLOCK/TIMER SET
on the remote. If the
current mode appears on the display, press
/
on the remote repeatedly to select “CLOCK,” and
then press ENTER
on the remote.
3
Set the time.
Press
/
on the remote repeatedly to set
the hour, and then press ENTER
on the remote.
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.
The clock settings are lost when you disconnect the
power cord or if a power failure occurs.
To run the DAB Automatic Scan
you purchase the system, DAB Automatic Scan starts
When you turn on the system for the first time after
automatically and creates a list of available services.
If you want to run the DAB Automatic Scan again,
perform the procedure below.
If you want to run the DAB Automatic Scan again,
perform the procedure below.
1
Press DAB AUTO SCAN
5
on the unit.
“DAB SCAN” and “PUSH DAB” appear.
2
Press DAB
5
.
by advancing asterisks. Depending on the DAB
Scanning begins. The scanning progress is indicated
services available in your area, scanning may take a
few minutes.
few minutes.
When scanning is complete, a list of available services
is created.
is created.
Notes
• If your country or region does not support DAB broadcast, “NO
• 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
• This procedure clears all previously stored presets.
• This tuner does not support data services.
Automatic Scan. Scanning is interrupted and service list may not be
created properly. In this case, run the DAB Automatic Scan again.
created properly. In this case, run the DAB Automatic Scan again.
• If you move to another area, repeat this procedure to store the
stations for your new area.
off to preserve your own DAB settings.
• Before unplugging the DAB antenna, make sure the system is turned
Selecting a music source
Press the following buttons (or press FUNCTION
repeatedly).
repeatedly).
To select
Press
CD
CD
on the remote.
Tuner
TUNER/BAND
.
DAB
DAB 5.
Tape
TAPE
on the remote.
Component* (connected
using an audio cord)
using an audio cord)
FUNCTION
repeatedly until “AUDIO
IN” appears.
repeatedly until “AUDIO
IN” appears.
* If the component has the AVLS (Automatic Volume Limiter System)
sound from the speakers.
or BASS BOST function, turn off the function to avoid distorted
Adjusting the sound
To adjust the volume
Press VOLUME +/– on the remote (or turn the
VOLUME control on the unit)
VOLUME control on the unit)
.
To
Press
Generate a more dynamic
sound (Dynamic Sound
Generator X-tra)
sound (Dynamic Sound
Generator X-tra)
Set the sound effect
DSGX
on the unit.
EQ qk on the remote.
Playing a CD/MP3 disc
1
Select the CD function.
Press CD on the remote (or FUNCTION repeatedly)
.
2
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
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
3
Start playback.
Press
(play)
on the remote (or CD/
(play/
pause)
on the unit).
To
Press
Pause playback
(pause)
on the remote (or
CD/
(play/pause)
on the
unit). To resume play, press it
again.
again.
Stop playback
(stop)
.
Select a folder on an
MP3 disc
MP3 disc
Select s track or file
+/– qh on the remote.
(go back/go forward)
on the remote (
/
on the
unit)
.
Find a point in a
track or file
track or file
Hold down
/
(rewind/
fast forward)
during playback,
and release it at the desired point.
Select Repeat Play
REPEAT
on the remote
repeatedly until “REP” appears.
To change the play mode
Press PLAY MODE
on the remote repeatedly while
the player is stopped. You can select normal play (“
for all MP3 files in the folder on the disc), shuffle 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.
Notes on Repeat Play
• All tracks or files on a dis are played repearedly up to five times.
• All tracks or files on a dis are played repearedly up to five times.
•
“REP1”
indicates that a single track or file is repeated until you stop
it.
Notes on playing MP3 discs
– folders is 150 (including the root folder).
– MP3 files is 255.
– MP3 files and folders that can be contained on a signal disc is 256.
– folder levels (the tree structure of files) ia eight.
– MP3 files is 255.
– MP3 files and folders that can be contained on a signal disc is 256.
– folder levels (the tree structure of files) ia eight.
• Compatibility with all P3 encodomg/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.
MP3 discs may produce noise or interrupted audio or may not play
at all.
Notes on playing multisession discs
• If the disc begins with a CD-DA (or MP3) session, it is recognized
• 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.
session is encountered.
• A disc with a mixed CD format is recognized as a CD-DA (audio)
disc.
Listening to the radio
Before you can receive DAB, you must complete the
DAB Automatic Scan procedure (see “Before using the
system”).
DAB Automatic Scan procedure (see “Before using the
system”).
1
Select “DAB” or “FM.”
Press TUNER/BAND
repeatedly. You can also
select DAB directly by pressing DAB
.
2
Select the tuning mode.
Press TUNING MODE
on the remote repeatedly
until “AUTO” appears.
3
Tune in the desired station.
Press +/– on the remote (or TUNING + or – on the
unit)
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 on the display.
“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 on the display.
Tip
Press (stop)
to stop automatic scanning (FM band only).
To tune in a station with a weak signal (FM
band only)
band only)
If the scanning does not stop, press TUNING MODE
on the remote repeatedly until “MANUAL” appears, and
then press +/– on the remote (or TUNING + or – on the
unit)
on the remote repeatedly until “MANUAL” appears, and
then press +/– on the remote (or TUNING + or – on the
unit)
repeatedly to tune in the desired station.
Notes on listening to DAB stations
• When tuning in a DAB station, it may take a few seconds before you
• 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.
Playing a tape
Use buttons on the unit for the operation.
1
Select a tape function.
Press FUNCTION repeatedly (or TAPE on the
remote)
remote)
.
2
Insert a tape.
Press
(stop/eject)
on the unit, 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.
slack in the tape to avoid damaging the tape or the
tape deck.
3
Start playback.
Press
(play)
on the unit.
To
Press
Pause playback
(pause)
on the unit. To
resume play, press it again.
Stop playback
(stop/eject)
on the unit.
Rewind or fast
forward*
forward*
/
on the unit.
* Be sure to press
(stop/eject)
on the unit after the tape has
been wound or rewound to the end.
Do not turn off the system during playback or recording.
Note
Changing the display
To change
Press
Information on
the display
the display
1)
DISPLAY
repeatedly when the
system is on.
Display mode
(Clock)
(Clock)
DISPLAY when the system is
. The clock is displayed for eight
2)
seconds.
off
1)
For example, you can view:
The STANDBY indicator lights up when the system is turned off.
name (during normal play), or the total play time (while the player
is stopped)
is stopped)
– DAB station information such as the service name, channel label,
– CD/MP3 disc information such as the track or file number, folder
DLS (Dynamic Label Segment), or ensemble label
2)
Notes on the display information
– total playing time for a disc with MP3 files.
– elapsed playing time and remaining time of an MP3 file encoded
using a VBR (variable bit rate) when the file is played or is shifted
– elapsed playing time and remaining time of an MP3 file encoded
using a VBR (variable bit rate) when the file is played or is shifted
with fast forward or fast reverse.
– folder and file names that do not follow either the ISO9660 Level 1
or 2 standard.
– 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 (" $ % ’ ( )
label using uppercase letters (A to Z), numbers (0 to 9), and
symbols (" $ % ’ ( )
*
+ , – . / < = > @ [ \ ] _ ` { | } ! ? ^).
Using optional audio components
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
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.
system, and then select the AUDIO IN function.
1 2 3
45
6
7
8
qs
qa
q;
9
1
qd
qf
5
7
8
qg
3
qh
4
qj
qh
qk
ql
9
7
3
6
w;
To add a sound effect
• 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.
disc that has MP3 files.
• Folders that have no MP3 files are skipped.
• The maximum number of:.
• MP3 files are played back in the order that they are recorded onto
the disc.
• The system can only play MP3 files that have file extension of
“MP3”.
• If there are files on the disc that have the “MP3” files extension,
but that are no MP3 files, the unit may produce noise or may
malfunction.
the disc.
• The system can only play MP3 files that have file extension of
“MP3”.
• If there are files on the disc that have the “MP3” files extension,
but that are no MP3 files, the unit may produce noise or may
malfunction.
• The following are not displayd correctly;
• The following are displayed;