Sony CMT-EH15 Schematic

HCD-EH15
SERVICE MANUAL
Ver. 1.1 2008.07
• 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 and ai models: AC 220 V, 50/60 Hz Brazilian model: AC 127 or 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 specications are subject to change without notice.
9-889-094-02
2008.07
©
COMPACT DISC DECK RECEIVER
Sony Corporation
Audio&Video Business Group Published by Sony Techno Create Corporation
HCD-EH15
Ver. 1.1
• 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 classied 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
Note: Refer to supplement-1 for the MAIN board of printed wiring
board, schematic diagram and electrical parts list of Brazil­ian and Thai models.
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
Ver. 1.1
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 and Thai models
Korean model AC 220 V, 60 Hz
Taiwan model AC 120 V, 50/60 Hz
Singapore, Chilean and Peruvian models
Brazilian model AC 127 or 220 V, 50/60 Hz
AC 120 V, 60 Hz
AC 220 V, 50/60 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 dierent 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 eect
To Press
Generate a more dynamic sound (Dynamic Sound Generator X-tra)
Set the sound eect
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), shue 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 soware, 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)  aer 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 oers 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 aer 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 aer 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 specic 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 model), flexible flat cable (7 core) (FFC001) (UK model) (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), CASSETTE 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 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-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
+ –
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
Adjustment
JW403
L851
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 M impedance.
4. Clean the object lens by an applicator with neutral detergent when the signal level is low than specifi ed value with the following 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 u] button to play­back.
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
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
12
HCD-EH15
HCD-EH15
1313
• Circuit Board Location
• Waveforms – CD Board –
– MAIN Board – – PANEL Board –
SECTION 7

DIAGRAMS

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.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.)
A : B+ Line.
H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions.
– CD Board –
no mark : CD PLAY
– Other Section –
no mark : FM
[ ] : AM ( ) : 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 : FM f : AM J : CD PLAY E : TAPE PLAY
: REC
h : AUDIO IN
• Abbreviation
AR : Argentina model AUS : Australian model BR : Brazilian model CND : Canadian model E51 : Chilean and Peruvian model KR : Korean model MX : Mexican model RU : Russian model SP : Singapore model TH : Thai model TW : Taiwan model
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.)
• Indication of transistor.
Note:
The components identi­ ed by mark 0 or dotted line with mark 0 are criti­cal for safety. Replace only with part number specifi ed.
Note:
Les composants identifi és par une marque 0 sont critiques pour la sécurité. Ne les remplacer que par une piéce portant le nu­méro spécifi é.
Caution:
Pattern face side: (Conductor Side) Parts face side: (Component Side)
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.
Ver. 1.1
C
Q
B
E
Q
B
CE
These are omitted.
These are omitted.
PANEL board
IC101 JB (RFi)
(CD play mode)
200 mV/DIV, 500 ns/DIV
IC101 XG (XO)
(CD play mode)
59.1 ns
1 V/DIV, 20 ns/DIV
MAIN board
0.5 to 1.3 Vp-p
3.3 Vp-p
CD board
VOLTAGE-SEL board (Chilean, Peruvian, Brazilian and Singapore models)
PT-AC board
IC801 X (XOUT)
RB
13.4 μs
IC861 RG (XOUT)
RT
1.2 Vp-p
1 V/DIV, 10 μs/DIV
5 Vp-p
230 ns
2 V/DIV, 100 ns/DIV
IC701 RG (X3)
XB
IC701 PT (X1)
XT
30.8 μs
2 V/DIV, 20 μs/DIV
182 ns
2 V/DIV, 100 ns/DIV
3 Vp-p
3.4 Vp-p
Q507 (Collector)
RE
(Tape REC mode)
9.8 Vp-p
14.6 Ms
5 V/DIV, 10 Ms/DIV
HCD-EH15

7-1. PRINTED WIRING BOARD - CD Board -

123456789
A
CD BOARD (COMPONENT SIDE)
B
C401
C405
C
R212
R211
D
C207
IC201
5
C206
314
R201
E
C202
C204
C201
C205
R112
R111
C115
X102
• See page 13 for Circuit Boards Location.
C133
R155
C130
C128
C309
Q301
R303
R302
E
C307
R304
R301
: Uses unleaded solder.
CD BOARD (CONDUCTOR SIDE)
(RFEQO)
C106
C306
11
1-872-135-
(11)
TP122
TP124
(VC)
C122
C123
R151
C144
C148
C149
R142
C143
C140
C141
R144
R140
R143
C138
C146
R148
R135
C139
C142
C137
C147
C125
C124
R136
R146
C150
C145
R134
C105
C104
C118
R139
R130
C100
R145
R147
R149
R150
R129
76
C117
CN301
M
C136
R126
R127
R128
R125
C107
C112
IC101
100
1
C101
C120
C119
M401
(SPINDLE)
C403
R405
M402
(SLED)
R402
S201
(LIMIT)
C404
28 22 21 15
IC401
M
R118
C153
R114
C102
C103
C126 C127
161
R120
5175
25
C113
R101
R102
C303
17 814
R415
R414
C108
R113
50
R210
R110
R209
C110
R218
R219
R220
R153
R221
R222
C116
R223
C301
C302
26
R104
R106
C109
R154
C132
R105
R157
R156
R108
R408
R208
R207
R206
R205
R204
R203
C151
C152
1
21
R202
CN201
A
PANE L BOARD CNP701
(Page 16)
HCD-EH15
F
OPTICAL PICK-UP BLOCK
(KSM-213CDP)
1-872-135-
11
(11)
1414
HCD-EH15

7-2. SCHEMATIC DIAGRAM - CD Board -

CN301
16P
OPTICAL PICK-UP
BLOCK
(KSM-213CDP)
M401
(SPINDLE)
M
M402
(SLED)
M
SP-
SP+
SL+
SL-
• See page 13 for Waveforms. • See Page 21 for IC Block Diagrams. • See Page 24 for IC Pin Function Description.
R127
0
0
C107
0.1
Q301
2SA2119K
AUTOMATIC POWER
C301
0.1
C405
0.1
CONTROL
C306
R303
100
2.2
C303C302
1010
C404
0.1
10V
R304
2.2
C309
0.001
C403
0.1
R301
C307
100k
1
R302
0
R143
47k
C137
0.01
1
C100
0.1 C139
C106
100 10V
TP122 (RFEQO)
C105
0.1
C144
0.1
C148
47p
C149
C104
0.1
C140
C141
C142
TP124 (VC)
R144
C143
C146
C145
R145
R146
R147
R148
R149
C150
R405
10k
R402
2.2k
0.01
C147
22p
C136
R142 R139
22k 47k
470p
C138
0.01
0.0022
0.1
22k
0.01
470p
0.01
0.1
0
0
0
0
0
0.001
R150
0
47p
R129
1k
R134
R140
0
1M
R136 R135
22k 470k
R130
4.7k
C117
0.022
C118
0.01
R126
R125
0
470k
C112 C108
0.1 0.1
R128
R118 100k
IC101
CD-MP3 PROCESSOR
IC101
TC94A70FG-006 (D, HZ
C119
0.022
C120
0.01
0
R151
0.1
C102
0.0047
C123 470p
C124
C122 470p
0.0047
C125
C101
0.1
C153
R120
R114
0.1
0
10k
220
R101
0.0022
C127
0.1
C126
0.1
C113
R102
C103
0.1
10k
10k
R113
0.1
C133
R112
100
100
R111
R110
10k
0.1
C110
R153
1M
R154
C115
47
R155
22
6.3V
0.1
C116
1M
R108
0
C109
2
1k
1M
R105
R106
X102
16.9344MHz
5p
C128
5p
C130
0.1
C132
R104
0
CN201
21P
R211
R212
100
R210
100
R209
100
R218
100k
R219
100k
R220
100k
R221
100k
R222
100k
R223
100k
R208
100
R207
100
R206
100
R205
100
R204
100
R203
100
100
A
PAN EL BOARD CNP701
(Page 17)
IC B/D
C207
1
R157
100
R156
100
C201
C205
0.1
100 10V
0.1
C202
100 10V
TK63115SCL-G@GT
IC201
+1.5V REGULATOR
C204
0.1
IC201
C206
1
C151
470p
C152
470p
R201
0
R202
0
S201
(LIMIT)
HCD-EH15
IC401
FOCUS/TRACKING COIL DRIVE,
SLED/SPINDLE MOTOR DRIVE
IC401
BA5826SFP-E2
SP-
SP+
R414
4.7k
IC B/D
SL+
SL-
R408
2.2k
C401
R415
220
47k
10V
1515
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