Sony HCD-EH15 Service Manual
HCD-EH15
SERVICE MANUAL
Ver. 1.0 2008.04
• HCD-EH15 is the amplifi er, CD player, tape
deck and tuner section in CMT-EH15.
CD
Section
Ta pe
Section
Canadian Model
Australian Model
Russian Model
Model Name Using Similar Mechanism
Base Unit Name
Optical Pick-up Name
Model Name Using Similar Mechanism
Tape Transport Mechanism Type
UK Model
E Model
NEW
BU-K8BD90-WOD
KSM-213CDP
NEW
MF-EH10
SPECIFICATIONS
Amplifier section
European and Russian models:
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
Other models:
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)
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 stereo, FM/AM superheterodyne tuner
Antenna:
FM lead antenna
AM loop antenna
20 kHz
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)
Intermediate frequency: 10.7 MHz
AM tuner section:
Tuning range
Canadian and Latin American models:
530 1,710 kHz (with 10 kHz tuning interval)
531 1,710 kHz (with 9 kHz tuning interval)
European and Russian models:
531 1,602 kHz (with 9 kHz tuning interval)
Australian model:
531 1,710 kHz (with 9 kHz tuning interval)
530 1,710 kHz (with 10 kHz tuning interval)
Other models:
531 1,602 kHz (with 9 kHz tuning interval)
530 1,610 kHz (with 10 kHz tuning interval)
Intermediate frequency: 450 kHz
General
Power requirements:
Canadian model: AC 120 V, 60 Hz
Mexican model: AC 120 V, 60 Hz
Eu
ropean and Russian models: AC 230 V, 50/60 Hz
Australian model: AC 230 240 V, 50/60 Hz
Argentine model: AC 220 V, 50/60 Hz
Korean model: AC 220 V, 60 Hz
Taiwan model: AC 120 V, 50/60 Hz
Other models: AC 110 120 or 220 240 V, 50/60 Hz
Adjustable with voltage selector
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.
9-889-094-01
2008D05-1
2008.04
©
COMPACT DISC DECK RECEIVER
Sony Corporation
Audio Business Group
Published by Sony Techno Create Corporation
HCD-EH15
• 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
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.
8. EXPLODED VIEWS
8-1. Overall Section ............................................................... 27
8-2. Front Cabinet Section ..................................................... 28
8-3. Top Cabinet Section ........................................................ 29
8-4. Base Unit Section (BU-K8BD90-WOD) ........................ 30
9. ELECTRICAL PARTS LIST .............................. 31
ATTENTION AU COMPOSANT AYANT RAPPORT
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS QUE
PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS
PUBLIÉS PAR SONY.
À LA SÉCURITÉ!
2
SECTION 1
–
SERVICING NOTES
HCD-EH15
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.
MODEL IDENTIFICATION
Rear Cabinet –
Power Voltage
Indication
Model POWER VOLTAGE INDICATION
Canadian and Mexican
models
UK and Russian models AC 230 V, 50/60 Hz
Australian model AC 230 – 240 V, 50/60 Hz
Argentina model AC 220 V, 50/60 Hz
Korean model AC 220 V, 60 Hz
Taiwan model AC 120 V, 50/60 Hz
Singapore, Chilean and
Peruvian models
AC 120 V, 60 Hz
AC 110 – 120 or 220 – 240 V,
50/60 Hz
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-EH15
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 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.
1 Turn on the system.
Press (on/standby)
2 Selec t the clock set mode.
Press CLOCK/TIMER SET
appears, press /
“CLOCK,” and then press ENTER
3 Set the time.
Press /
then press ENTER
the minutes.
e clock settings are lost when you disconnect the
power cord or if a power failure occurs.
.
. If the current mode
repeatedly to select
.
repeatedly to set the hour, and
. Use the same procedure to set
Selecting a music source
Press the following buttons (or press FUNCTION
repeatedly).
To select Press
CD
Tun e r
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
FUNCTION
repeatedly until “TAPE”
appears.
AUDIO IN
.
.
.
Adjusting the sound
To adjust the volume
Press VOLUME +/ (or turn the VOLUME control on
.
the unit)
To add a sound eect
To Press
Generate a more dynamic
sound (Dynamic Sound
Generator X-tra)
Set the sound eect
DSGX
EQ
.
on the unit.
Playing a CD/MP3 disc
1 Selec t the CD function.
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
3 Star t playback.
Press (play) (or CD/ (play/pause) on the unit)
.
To Press
Pause playb ack
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.
Notes on Repeat Play
All tracks or les on a disc are played repeatedly up 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 are recorded 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 may produce 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.
(pause) (or CD/ on the
unit)
it again.
(stop)
+/ (select folder) .
/ (go back/go forward)
(/ on the unit) .
Hold down / (rewind/
fast forward)
and release it at the desired point.
REPEAT
“REP” or “REP1” appears.
.
. To resume play, press
.
during playback,
repeatedly until
” for all MP3
Listening to the radio
1 Selec t “FM” or “AM.”
Press TUNER/BAND
2 Selec t 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. When you tune in a station that provides RDS
services, the station name appears.
Tip
To stop automatic scanning, press (stop) .
To tune in a station with a weak signal
Press TUNING MODE repeatedly 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.
repeatedly.
repeatedly until “AUTO”
.
Playing a tape
Use buttons on the unit to play a tape.
1 Selec t the tape function.
Press FUNCTION
2 I nsert a tape.
Press (stop/eject)
cassette holder. Make sure there is no slack in the tape
to avoid damaging the tape or the tape deck.
3 Star t playback.
Press (play)
To Press
Pause playb ack
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.
repeatedly.
, and insert the tape into the
.
(pause)
. To resume play, press
it again.
(stop/eject)
/ (rewind/fast forward)
.
.
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 or folder name during normal play, or the total
play time while the player is stopped.
2)
e STANDBY indicator lights up 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 Level1,
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 (‘< > * + , – / @ [ \ ] _).
DISPLAY repeatedly when the
1)
system is on.
when the system is
DISPLAY
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
cord (not supplied). Turn down the volume on the
system, and then select the AUDIO IN function.
on the unit using an audio analog
4
Other Operations
HCD-EH15
Creating your own CD program
(Program Play)
Use buttons on the remote to create your own program.
1 Press CD
2 Press PLAY MODE
3 Press /
4 Press ENTER
5 Repeat steps 3 through 4 to program additional
6 To play your program of tracks or les, 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
To view program information, such as total track number
of the program, press DISPLAY
to select the CD function.
while the player is stopped.
track number appears.
When programming MP3 les, press
repeatedly to select the desired folder, and then select
the desired le.
Selected track or le number
program.
tracks or les, up to a total of 15 tracks or les.
e program remains available until you open the CD
compartment. To play it again, select the CD function,
and then press
repeatedly until “PGM” appears
repeatedly until the desired
to add the track or le to the
.
while the player is stopped.
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 Press TUNER/BAND
“AM .”
2 Press TUNING MODE
appears (or “MANUAL” appears, for a station with a
weak signal).
3 Press +/
Scanning stops automatically when a station is tuned
in, and then “TUNED” and “STEREO” (for stereo
programs) appear.
If “TUNED” does not appear and the scanning does
not stop, press TUNING MODE
appears, and then press +/
the desired station.
4 Press TUNER MEMORY
5 Press +/
preset number.
If another station is already assigned to the selected
preset number, the station is replaced by the new
stations.
6 Press ENTER
7 Repeat steps 1 through 6 to store other stations.
You can preset up to 20 FM and 10 AM stations. e
preset stations are retained for about half a day even
if you disconnect the power cord or if a power failure
occurs.
8 To call up a preset radio station, press TUNING
MODE
then press +/
preset number.
To change the AM tuning interval from the factory
preset to 9 kHz (or 10 kHz, for some areas; this function
is not available on European and Russian model), tune
in any AM station, and then turn o the system. Press
DISPLAY
TUNING +
the AM preset stations are erased. To reset the interval to
the factory preset, repeat the procedure.
repeatedly to select “FM” or
repeatedly until “AUTO”
to tune in the desired station.
until “MANUAL”
repeatedly to tune in
.
Preset number
repeatedly to select your desired
.
repeatedly until “PRESET” appears, and
repeatedly to select the desired
to display the clock, and while hold down
on the unit, press on the unit. All
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 I nsert 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
“
the desired folder.
To record only your favorite CD tracks or MP3 les in
your desired order, perform steps 2 to 5 of “Creating
your own CD program.”
3 Star t recording.
Press (record)
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 stop recording, press
Tip
We recommend that you press rst, and then press to
avoid noise being recorded when you stop recording.
on the remote repeatedly to select
,” and then press +/ repeatedly to select
, and then start playing the
.
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
system automatically turns o aer 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 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.
2 Press CLOCK/TIMER SET
3 Press /
4 Set the time to star t playing.
5 Use the same procedure as in step 4 to set the time
6 Selec t the sound source.
7 Press
To activate or check the timer again, press CLOCK/
TIMER SELECT
“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.
repeatedly. If you select “AUTO,” the
Prepare the sound source, and then press VOLUME
+/
to adjust the volume.
To start from a specic CD track or MP3 le, create
your own CD program.
and then press ENTER
“ON TIME” appears, and the hour indication ashes.
Press /
then press ENTER
e minute indication ashes. Use the procedure
above to set the minutes.
to stop playing.
Press /
sound source appears, and then press ENTER
display shows the timer settings.
e system turns on 15 seconds before the preset time.
If the system is on at the preset time, the Play Timer
will not play.
.
repeatedly to select “PLAY SET,”
.
repeatedly to set the hour, and
.
repeatedly until the desired
to turn o the system.
, press / repeatedly until
. e
.
.
5
HCD-EH15
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)
connector
claw
flexible flat cable (FFC003)
(CN201)
two connectors
(CNP501, CNP502)
flexible flat cable (17 core)
(FFC002) (CN105)
flexible flat cable (5 core) (FFC001)
(except UK, Russian models),
flexible flat cable (7 core) (FFC001)
(UK, Russian models)
(CN106)
MAIN board
RB
claw
(SW750)
HCD-EH15
claw
claw
front cabinet block
claw
REC lever
Note: Adjust so that the space of slide switch (REC/PB) (SW501)
3-4. MF-EH10 (TAPE MECHANISM DECK), CASETTE LID
screw
(BVTP2.6)
cassette lid
RE
slide switch (REC/PB) (SW501)
2.3 ± 0.4 mm
REC lever becames 2.3 ± 0.4 mm
screw
lever (REC)
two screws
(BVTP2.6)
.
two screws
(BVTP2.6)
PWB holder
Note: When removing cassette lid,
it's possible to remove cassette
lid by the order of RTRE.
two claws
RT
Open the button cover (C).
Push the eject button.
cable holder
R
two screws
MF-EH10
RB
(tape mechanism deck)
7
HCD-EH15
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-EH15
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, “1115V002”.
5. Press the [TUNER/BAND] button, model name and destination
are displayed. For example, “EH15ASIA”.
6. To release from this mode, press three buttons of [FUNCTION],
[TUNER/BAND], and [
] button to turn the power on.
?/1
] simultaneously.
?/1
TUNER STEP CHANGE
(Except UK and Russian models)
The AM tuning interval can be changed over 9 kHz or 10 kHz.
Procedure:
1. Press the [
2. Press the [TUNER/BAND] button to select TUNER (AM)
function.
3. Press the [
4. After pressing the [DISPLAY] button on the remote commander, while pressing the [TUNING + M L] button, press the
] button.
[
?/1
5. It turns power on and display “9K STEP” or “10K STEP”, and
thus the tuning interval is changed over.
] button to turn the power on.
?/1
] button again to turn the power off (standby).
?/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 [l m – TUNING], [FUNCTION],
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
] simultaneously.
] simultaneously.
?/1
+ 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.
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.
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.
] button to turn the power on.
?/1
l m
– TUNING], [DSGX] and
] button to turn the
?/1
9
HCD-EH15
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)
MAIN board
PHONES jack
(J102)
set
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
1dB
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
1dB
Screw
position
H
10
4. After the adjustments, apply suitable locking compound to the
pats adjusted.
HCD-EH15
Adjustment Location: Record/Playback/Erase Head
Note: Remove the cassette lid before this adjustment.
Refer to “DISASSEMBLY” (page 6)
TUNER SECTION
0 dB=1 μV
[AM]
Setting:
Function: TUNER
Band: AM
60 cm
loop antenna A
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
loop antenna B
set
[FM]
Setting:
Function: TUNER
Band: FM
MAIN board
JW403
FM RF signal
generator
MAIN board
CNP802 pin
(TUNER OUT L-ch)
level meter
• Repeat the procedures in each adjustment several times, and
the tracking adjustments should be fi nally done by the trimmer
capacitors.
• Remove FM antenna in FM adjustment.
(): UK and Russian models
AM VT VOLTAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
L852 530 (531) kHz 1.5 ± 0.1 V
Confi rmation 1710 (1602) kHz 8.0 (7.2) ± 0.5 V
(): UK and Russian models
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L851 530 (531) kHz
FM VT VOLTAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
L805 87.5 MHz 1.75 ± 0.1 V
Confi rmation 108 MHz 6.2 ± 0.5 V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L804 98 MHz
FM DETECTOR ADJUSTMENT
Setting:
Function: TUNER
BAND button: FM
FM RF Signal
generator
Carrier frequency : 98 MHz
Modulation : deviation by
FM 75 kHZ
Output level : 60 dB
MAIN board
JW403
(TUNER OUT L-ch)
set
MAIN board
JW148 (GND)
1. Tune the set to 98 MHz.
2. Adjust L806 so that modulation distortion may become the
best in the vicinity of the maximum value where the tuner out
level becomes -156Bs or more.
1 kHz frequency
deviation by FM 75 kHz
signal
Output level:
as low as possible
MAIN board
JW821 (VT)
JW805 (GND)
set
MAIN board
CNP802 pin
digital voltmeter
10 k Ω
+
–
MAIN board
JW148
(GND)
11
HCD-EH15
V
Adjustment Location:
– MAIN Board (Component Side) –
L805
FM VT
Voltage
Adjustment
L806
FM Detector
Adjustment
L804
FM Tracking
Adjustment
– MAIN Board (Conductor Side) –
CNP802
JW805
(GND)
JW821
(VT)
1
3
JW148
(GND)
(TUNER OUT L-ch)
JW402
(TUNER OUT R-ch)
L852
AM VT
Voltage
Adjustment
AM Tracking
JW403
L851
Adjustment
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
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.
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
level:
1.2 ± 0.3 Vp-p
12
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