Sony HCD-EH45DAB Service Manual
HCD-EH45DAB
SERVICE MANUAL
Ver. 1.0 2008.04
• HCD-EH45DAB is the amplifi er, CD player, tape
deck and tuner section in CMT-EH45DAB.
CD
Section
Tape
Section
Model Name Using Similar Mechanism
Base Unit Name
Optical Pick-up Name
Model Name Using Similar Mechanism
Tape Transport Mechanism T ype
UK Model
HCD-EH15
BU-K8BD90-WOD
KSM-213CDP/C2NP
HCD-EH15
MF-EH10
Main unit
Amplifier 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
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
CD player section
System: Compact disc and digital audio system
Laser Diode Properties
Emission Duration: Continuous
Laser Output*: Less than 44.6μW
* is 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
Signal-to-noise ratio: More than 90 dB
Dynamic range: More than 90 dB
Tape deck section
Recording system: 4-track 2-channel, stereo
Tuner section
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.
20 kHz
SPECIFICATIONS
DAB frequency table (Band-III)
* Frequencies are displayed to two decimal places on this system.
General
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 specications are subject to change without notice.
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
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
9-889-088-01
2008D05-1
2008.04
©
COMPACT DISC DECK RECEIVER
Sony Corporation
Audio Business Group
Published by Sony Techno Create Corporation
HCD-EH45DAB
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be damaged by heat.
CAUTION
Use of controls or adjustments or performance of procedures other than
those specifi ed herein may result in hazardous radiation exposure.
is appliance is classied
as a CLASS 1 LASER
product. is marking
is located on the rear
exterior.
TABLE OF CONTENTSNotes on chip component replacement
1. SERVICING NOTES ............................................. 3
2. GENERAL .................................................................. 4
3. DISASSEMBLY
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
4. TEST MODE ............................................................ 9
5. MECHANICAL ADJUSTMENTS ...................... 10
6. ELECTRICAL ADJUSTMENTS ........................ 10
7. DIAGRAMS
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. EXPLODED VIEWS
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
9. ELECTRICAL PARTS LIST .............................. 30
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.
2
SECTION 1
SERVICING NOTES
HCD-EH45DAB
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
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 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.
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the leadfree 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.
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.
SW750
Fig.1 Method to push the SW750
3
HCD-EH45DAB
Basic Operations
SECTION 2
GENERAL
This section is extracted
from instruction manual.
Open the tape
section lid.
is 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.
Before using the system
To use the remote
Slide and remove the battery compartment lid , and
insert the two R6 (size AA) batteries (not supplied),
side rst, matching the polarities shown below.
Notes
If your country or region does not support DABbroadcast,
“NO SERV” appears.
Do not press any button on the unit or the remote during DAB
AutomaticS can. 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.
is procedure clears all previously stored presets.
Before unplugging the DAB antenna, make sure the system is turned
o to preserve your own DAB settings.
is tuner does not support data services.
Selecting a music source
Press the following buttons (or press FUNCTION
repeatedly).
To select Press
CD
Tun e r
DAB
Tap e
Component* (connected
using an audio cord)
* If the component has the AVLS (Automatic Volume Limiter System)
or BASS BOOST function, turn o the function to avoid distorted
sound from the speakers.
CD
.
TUNER/BAND .
on the unit.
DAB
FUNCTION
repeatedly until “TAPE”
appears.
AUDIO IN
.
Adjusting the sound
To adjust the volume
Press VOLUME +/ (or turn the VOLUME controlon
the unit) .
To add a sound eect
To Press
Generate a more dynamic
sound (Dynamic Sound
Generator X-tra)
Set the sound eect
DSGX on the unit.
.
EQ
Playing a CD/MP3 disc
Select the CD function.
1
Press CD (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 PUSH OPEN/
CLOSE on the unit.
PUSH OPEN/CLOSE
Notes on Repeat Play
All tracks or les on a disc are played repeatedlyup to ve times.
“REP1” indicates that a single track or le is repeated until you stop
it.
Notes on playing MP3 discs
Do not save other types of tracks or les or unnecessary folders on a
disc that has MP3 les.
Folders that have no MP3 les are skipped.
MP3 les are played back in the order that they arerecorded onto
the disc.
e system can only play MP3 les that have a le extension of
“.MP3”.
If there are les on the disc that have the “.MP3” le extension,
but that are not MP3 les, the unit mayproduce noise or may
malfunction.
e maximum number of:
folders is 150 (including the root folder).
MP3 les is 255.
MP3 les and folders that can be contained on a single disc is 256.
folder levels (the tree structure of les) is 8.
Compatibility with all MP3 encoding/writing soware, recording
device, and recording media cannot be guaranteed. Incompatible
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
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.
Listening to the radio
Before you can receive DAB, you must complete the
DAB Automatic Scan procedure (see “Before using the
system”).
1 Select “DAB” or “FM.”
Press TUNER/BAND
select DAB directly bypressing DAB
2 Select the tuning mode.
Press TUNING MODE
appears.
3 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.
Tip
Press (stop) to stop automatic scanning (FM band only).
To tune in a station with a weak signal
(FM band only)
Press TUNING MODE repe atedly until “MANUAL”
appears, and then press +/ (or TUNING +/ on the
repeatedly to tune in the desired station.
unit)
To reduce static noise on a weak FM stereo
station
Press FM MODE repeatedly until “MONO” appears
to turn o stereo reception.
Notes on listening to DAB stations
When tuning in a DAB station,it may take a few seconds be fore you
hear any sound.
Primary service is automatically received when secondary service
ends.
repeatedly. You can also
on the unit.
repeatedly until “AUTO”
.
Changing the display
To change Press
Information on
the display
Display mode
(Clock)
1)
For example, you can view:
CD/MP3 disc information such as the track or le 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)
e STANDBY indicator lightsup when the system is turned o.
Notes on the display information
e 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 le.
e following are not displayed correctly;
elapsed playing time of an MP3 le encoded using VBR (variable
bit rate).
folder and le names that do not follow either ISO9660 Level 1,
Level 2 or Joliet in the expansion format.
e following are displayed;
ID3 tag information for MP3 les 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 (" $ % ’ ( ) * + , – . / < = > @ [ \ ] _ ` { | } ! ? ^).
DISPLAY repeatedly when the
1)
system is on.
DISPLAY when the system is
2)
. e clock is displayed for eight
off
seconds.
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 on the unit using an audio analog
cord (not supplied). Turn down the volume on the
system, and then select the AUDIO IN function.
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 dierent 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.
1
Press (on/standby) .
2 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.
3
Press / repeatedly to set the hour, and
then press ENTER . Use the same procedure to set
the minutes.
e 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 rst time aer
you purchase the system, DAB AutomaticS can starts
automatically and creates a list ofavailable services. If
you want to run the DAB AutomaticSc an again, perform
the procedure below.
Press DAB AUTO SCAN on the unit.
1
“DAB SCAN” and “PUSH DAB” appear.
Press DAB on the unit.
2
Scanning begins. e 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.
Start playback.
3
Press
(play) (or CD/ (play/pause) on the unit)
.
To Press
Pause playback
Stop playback
Select a folder on an
MP3 disc
Select a track or le
Find a point in a
track or le
Select Repeat Play
To change the play mode
Press PLAY MODE repeatedly while the player is
stopped. You can select normal play (“
les in the folder on the disc), shue play (“SHUF” or
SHUF*”), or program play (“PGM”).
“
* When playing a CD-DA disc, (SHUF) Play performs the same
operation as SHUF Play.
(pause) (or CD/ on the
unit)
. To resume play, press
it again.
(stop) .
+/ (select folder) .
/ (go back/go forward)
( / on the unit) .
Hold down / (rewind/
fast forward) dur ing playback,
and release it at the desired point.
REPEAT repeatedly until
“REP” or “REP1” appears.
” for all MP3
Playing a tape
Use buttons on the unit to play a tape.
1 Select the tape function.
Press FUNCTION repeatedly.
Insert a tape.
2
(stop/eject) , and insert the tape into the
Press
cassette holder. Make sure there is no slack in the tape
to avoid damaging the tape or the tape deck.
Start playback.
3
(play) .
Press
To Press
Pause playback
Stop playback
Rewind or fast
forward*
* Be sure to press (stop/eject) aer the tape has been wound
or rewound to the end.
Note
Do not turn o the system during playback or recording.
(pause)
. To resume play, press
it again.
(stop/eject) .
/ (rewind/fast forward) .
4
Other Operations
HCD-EH45DAB
Creating your own CD program
(Program Play)
Use buttons on the remote to create your own program.
1 Press CD to select the CD function.
2 Press PLAY MODE repeatedly until “PGM” appears
while the player is stopped.
3 Press / repeatedly until the desired
track number appears.
When programming MP3 les, press
repeatedly to select the desired folder, and then select
the desired le.
Selected track or file number
4 Press ENTER to add the track or le to the
program.
5 Repeat steps 3 through 4 to program additional
tracks or les, up to a total of 15 tracks or les.
6
To play your program of tracks or les, press .
e 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 le 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.
+/
Presetting radio stations
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.
1 Tune in the desired station (see “Listening to the
radio”).
2 Press TUNER MEMORY .
3 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.
4 Press ENTER .
5 Repeat steps 1 through 4 to store other stations.
You can preset up to 20 DAB and 20 FM stations. e
preset stations are retained for about half a day even
if you disconnect the power cord or if a power failure
occurs.
6 To call up a preset radio station, press TUNING
MODE repeatedly until “PRESET” appears, and
then press +/ repeatedly to select the desired
preset number.
Note on presetting DAB stations
You can preset a DAB service only when it can be received.
Preset number
Recording onto a tape
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.
1 Insert a recordable tape into the cassette holder
with the side you want to record facing forward.
2 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 recordonly your favorite CD tracks or MP3 les in
your desired order, perform steps 2 to 5 of “Creating
your own CD program.”
3 Start recording.
Press (record) , and then start playing the
desired recording source.
e 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 stoprecording, press .
Tip
Werecommend that you press rst, and then press to
avoid noise being recorded when you stop recording.
Using the Timers
e system oers two timer functions. If you use both
timers, the Sleep Timer has priority.
Use buttons on the remote to use the timer functions.
Sleep Timer:
You can fall asleep to music. is function works even if
the clock is not set.
Press SLEEP repeatedly. If you select “AUTO,” the
system automatically turns o aer the current disc or
tape stops or in 100 minutes.
If the tape deck is still playingor recording at the set
time, the system turns o aer the tape deck stops.
Play Timer:
You can wake up to CD or tuner at a preset time.
Make sure you have set the clock.
1 Prepare the sound source.
Prepare the sound source, and then pressVOLUME
+/ to adjust the volume.
To start from a specic CD track or MP3 le, create
your own CD program.
Press CLOCK/TIMER SET .
2
3 Press / repeatedly to select “PLAY SET,”
and then press ENTER .
“ON TIME” appears, and the hour indication ashes.
4 Set the time to start playing.
Press
/ repeatedly to set the hour, and
then press ENTER .
e minute indication ashes. Use the procedure
above to set the minutes.
5 Use the same procedure as in step 4 to set the time
to stop playing.
6 Select the sound source.
Press / repeatedly until the desired
sound source appears, and then press ENTER . e
display shows the timer settings.
7 Press to turn o the system.
e system turns on 15 seconds before the preset time.
If the system is on at the preset time, the PlayTimer
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.
Tip
e Play Timer setting remains as long as the setting is not canceled
manually.
5
HCD-EH45DAB
DISASSEMBLY
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SET
3-2. REAR CABINET BLOCK
(Page 6)
3-3. FRONT CABINET BLOCK,
TOP CABINET BLOCK,
MAIN BOARD
(Page 7)
SECTION 3
3-4. MF-EH10 (TAPE MECHANISM DECK),
CASSETTE LID
(Page 7)
Note: Follow the disassembly procedure in the numerical order given.
3-2. REAR CABINET BLOCK
screw
(KTP2 3 × 8)
3-5. BASE UNIT BLOCK
(BU-K8BD90-WOD)
(Page 8)
3-6. OPTICAL PICK-UP BLOCK
(KSM-213CDP)
(Page 8)
(BVTP3 × 10)
two screws
screw
(KTP2 3 × 8)
two screws
(BVTP3 × 10)
rear cabinet block
two screws
connector
(CN002)
(BVTP3 × 10)
6
3-3. FRONT CABINET BLOCK, TOP CABINET BLOCK, MAIN BOARD
top cabinet block
R
two screws
(BVTP2.6)
claw
flexible flat cable (5 core) (FFC001)
(CN103)
MAIN board
RG
two connectors
(CNP501, CNP502)
claw
flexible flat cable
(17 core) (FFC002)
(CN105)
flexible flat cable (FFC003)
connector
(SW750)
(CN201)
HCD-EH45DAB
claw
connector
RT
(CN602)
RB
(CN104)
RE
(DAB tuner)
connector
module
claw
claw
front cabinet block
REC lever
slide switch (REC/PB) (SW501)
2.3 ± 0.4 mm
Note: Adjust so that the space of slide switch (REC/PB) (SW501)
REC lever becames 2.3 ± 0.4 mm
3-4. MF-EH10 (TAPE MECHANISM DECK), CASSETTE LID
screw
(BVTP2.6)
cassette lid
RE
Note: When removing cassette lid,
it’s possible to remove cassette
lid by the order of RT RE.
lever (REC)
.
screw
two screws
(BVTP2.6)
MF-EH10 (tape mechanism deck)
RB
two screws
(BVTP2.6)
PWB holder
two claws
RT
Open the button cover (C).
Push the eject button.
two screws
cable holder
R
7
HCD-EH45DAB
3-5. BASE UNIT BLOCK (BU-K8BD90-WOD)
Note: This illustration sees the top cabinet block back side from back.
four screws
(PWH B2.6)
base unit block
(BU-K8BD90-WOD)
two vibration proof rubbers
(green)
CD cover
(red)
four claws
top cabinet block
two vibration proof rubbers
3-6. OPTICAL PICK-UP BLOCK (KSM-213CDP)
Remove the four solders.
optical pick-up block
(KSM-213CDP)
wire (flat type) (16 core)
(optical pick-up, CD board: CN301)
CD board
8
SECTION 4
TEST MODE
HCD-EH45DAB
COLD RESET
The cold reset clears all data including preset data stored in the
memory to initial conditions. Execute this mode when returning
the set to the customer.
Procedure:
1. Press three buttons of [x], [l m – TUNING] and [
simultaneously.
2. When “RESET” appears, the set enters standby status.
?/1
PANEL TEST
Procedure:
1. Press the [
2. Press three buttons of [FUNCTION], [TUNER/BAND], and
[
] simultaneously.
?/1
3. When the panel test is activated, [STANDBY] LED and segments on the liquid crystal display are all turned on.
4. Press the [CD u] button, date and version are displayed. For
example, “1029V001”.
5. Press the [TUNER/BAND] button, model name and destination
are displayed. For example, “EH45CE2”.
6. To release from this mode, press three buttons of [FUNCTION],
[TUNER/BAND], and [
] button to turn the power on.
?/1
] simultaneously.
?/1
CD SERVICE MODE
This mode can move the SLED of the optical pick-up, and also can
turn the optical pick-up laser power on and off.
Procedure:
1. Press the [
2. Press the [FUNCTION] button to select CD function.
3. Press three buttons of [
and [
?/1
4. It enters the CD service mode and displays “SERVICE”.
5. To release from this mode, press three buttons of [l m
– TUNING], [FUNCTION] and [
Key Operation:
[TUNING + M L], [l m – TUNING]:
Use these keys to move the SLED. When [TUNING
When [l m – TUNING] is pressed in this
[FUNCTION]:
Use this key to turn the optical pick-up laser power
] button to turn the power on.
?/1
l m
] simultaneously.
+ M L] is pressed in this mode, the SLED moves
to outer circumference and the message “SLED
OUT” is displayed.
mode, the SLED moves to inner circumference and
the message “SLED IN” is displayed.
on and off. When the laser power is turned on, the
message “LD ON” is displayed. When the laser
power is turned off, the message “LD OFF” is displayed.
– TUNING], [FUNCTION],
] simultaneously.
?/1
CD ERROR CODE
The past errors of the optical pick-up system (= optical unit + CD
board) are displayed as the BD Errors as shown below.
Procedure:
1. Press the [
]
2. Press the [FUNCTION] button to select CD function.
3. Press three buttons of [
[
] simultaneously.
?/1
4. Then, the BD error code is displayed as “D0xxxxxx” (x means
hexadecimal number) on the liquid crystal display as shown
below.
5. Every pressing of the [TUNING + M L] button in this
mode increments the number after “D” starting from “D0” up
to “D4”, and then returns to “D0”. Every pressing of the [l
– TUNING] button in this mode decrements the number
m
after “D”. The smaller the error code number is, the newer the
error content is.
6. To release from this mode, press the [
power off.
Contents of “BD Errors”
Error display example
D 0 01 06 01
1 2 3 4
1 It indicates the error history number
0 to 4: The error code number 0 indicates the newest error.
2 It indicates the error content
01: The focus servo cannot lock-in.
02: GFS is no good (NG).
03: The startup time exceeds the specifi ed period of time (time
over)
04: The focus servo is unlocked continuously.
05: Q code cannot be obtained within the specifi ed period of
time.
06: The tracking servo cannot lock-in.
07: Blank disc
3 It indicates the on-going processing of optical pick-up system
(= optical unit + CD board) when the trouble has occurred.
01: The CD SHIP mode processing is in progress.
02: The POWER OFF processing is in progress.
03: The POWER ON processing is in progress.
04: The INITIALIZE processing is in progress.
05: The optical pick-up system (= optical unit + CD board) is
in the stop state.
06: The STOP operation is in progress.
07: The startup processing is in progress.
08: The TOC read-in processing is in progress.
09: The SEARCH operation is in progress.
0A: The PLAY operation is in progress.
0B: The PAUSE operation is in progress.
0C: The PLAY – MANUAL SEARCH operation is in prog-
ress.
0D: The PAUSE – MANUAL SEARCH operation is in prog-
ress.
] button to turn the power on.
?/1
l m
– TUNING], [DSGX] and
] button to turn the
?/1
4 It indicates the operation that is being processed when the trou-
ble has occurred.
It indicates the step number of each processing specifi ed by 3.
Because the numbers of steps are different in each processing,
this number is different in each processing.
9
HCD-EH45DAB
SECTION 5
MECHANICAL ADJUSTMENTS
SECTION 6
ELECTRICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab:
record/playback head pinch roller
erase head rubber belts
capstan idlers
2. Demagnetize the record/playback head with a head demagnetizer. (Do not bring the head magnetizer close to the erase
head.)
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, appiy suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
TORQUE MEASUREMENT
Mode Torque meter Meter reading
FWD CQ-102AS
FWD
Back Tension
FF CQ-201AS
REW CQ-201B
CQ-102C
2.0 – 8.0 mN • m
(20 – 80 g • cm)
(0.28 – 1.12 oz • inch)
0.15 – 0.6 mN • m
(1.5 – 6.0 g • cm)
(0.021 – 0.083 oz • inch)
5.0 – 17.7 mN • m
(50 – 177 g • cm)
(0.7 – 2.48 oz • inch)
5.0 – 17.7 mN • m
(50 – 177 g • cm)
(0.7 – 2.48 oz • inch)
DECK SECTION
0 dB = 0.775 V
1. Demagnetize the record/playback head with a head
demagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.
TEST TAPE
Tape Signal Used for
P-4-A063 6.3 kHz, –10 dB Azimuth Adjustment
RECORD/PLAYBACK HEAD AZIMUTH ADJUSTMENT
Procedure:
1. Mode: Playback
test tape
P-4-A063
(6.3 kHz, –10 dB)
set
MAIN board
PHONES jack
(J102)
level meter
+
–
2. Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1dB of peak.
TAPE TENSION MEASUREMENT
Mode Torque meter Meter reading
FWD CQ-403A
(more than 2.82 oz)
more than 80 g
L-CH
peak
R-CH
Screw
position
peak
3. Mode: Playback
test tape
P-4-A063
(6.3 kHz, –10 dB)
within
1 dB
Output
level
L-CH
peak
MAIN board
PHONES jack
(J102)
set
waveform of oscilloscope
in phase 45° 90° 135° 180°
good
R-CH
peak
oscilloscope
V
wrong
within
1 dB
Screw
position
H
10
4. After the adjustments, apply suitable locking compound to the
pats adjusted.
HCD-EH45DAB
V
Adjustment Location: Record/Playback/Erase Head
Note: Remove the cassette lid before this adjustment.
Refer to “DISASSEMBLY” (page 6)
TUNER SECTION
FM TUNE LEVEL CHECK
signal
generator
set
Procedure:
1. Turn on the set.
2. Input the following signal from signal generator to FM antenna
input directly.
CD SECTION
Note:
1. CD Block is basically constructed to operate without adjustment.
2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10 MΩ impedance.
4. Clean the object lens by an applicator with neutral detergent
when the signal level is low than specifi ed value with the fol-
lowing checks.
5. Check the focus bias check when optical pick-up block is replaced.
FOCUS BIAS CHECK
oscilloscope
(DC range)
CD board
TP122 (RFEQO)
TP124 (VC)
+
–
Procedure:
1. Connect oscilloscope to TP122 (RFEQO) and TP124 (VC) on
the CD board.
2. Press the [?/1] button to turn the power on.
3. Set the disc (YEDS-18) and press the [CD
] button to play-
u
back.
4. Confi rm that oscilloscope waveform is as shown in the fi gure
below. (eye pattern)
A good eye pattern means that the diamond shape (◊) in the
center of the waveform can be clearly distinguished.
VOLT/DIV: 200 m
TIME/DIV: 500 ns
level:
1.2 ± 0.3 Vp-p
Carrier frequency : A = 87.5 MHz, B = 98 MHz, C = 108 MHz
Deviation :75 kHz
Modulation : 1 kHz
ANT input : 35 dBu (EMF)
Note: Use 75 ohm coaxial cable to connect signal generator and the set.
You cannot use video cable for checking.
Use signal generator whose output impedance is 75 ohm.
3. Set to FM tuner function and tune A, B and C signals.
4. Confi rm “TUNED” is lit on the display for A, B and C sig-
nals.
When the selected station signal is received in good condition,
“TUNED” is displayed.
Checking Location:
– CD Board (Conductor Side) –
TP124
(VC)
TP122
(RFEQO)
IC101
11
HCD-EH45DAB
SECTION 7
DIAGRAMS
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
For Printed Wiring Boards.
Note:
• X : Parts extracted from the component side.
• Y : parts extracted from the conductor side.
• W : indicates side identifi ed with part number.
• f : internal component.
• : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side:
(Conductor Side)
Parts face side:
(Component Side)
• Indication of transistor.
C
Q
B
E
Q
B
CE
Parts on the pattern face side seen from
the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
These are omitted.
These are omitted.
For Schematic Diagrams.
Note:
• All capacitors are in μF unless otherwise noted. (p: pF) 50
WV or less are not indicated except for electrolytics and
tantalums.
• All resistors are in Ω and 1/4 W or less unless otherwise
specifi ed.
• f : internal component.
• C : panel designation.
Note: The components identifi ed by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specifi ed.
• A : B+ Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
– CD Board –
no mark : CD PLAY
– Other Section –
no mark : TUNER
( ) : CD PLAY
[ ] : TAPE PLAY
‹‹ ›› : REC
• Voltages are taken with VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F : TUNER
J : CD PLAY
E : TAPE PLAY
: REC
f : AUDIO IN
12
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