AntennaBuilt-in ferrite bar antenna
Intermediate frequency450 kHz
Photo: HCD-EP40
CD SectionCD Mechanism TypeCS-21SC-1280
TAPE SectionTape Transport Mechanism TypeTCM125-2
SPECIFICATIONS
audio system
(λ=780 nm)
Emission duration:
continuous
using Sony TYPE I
cassette
(with the interval set at
10 kHz)
531 - 1 602 kHz
(with the interval set at
9 kHz)
531 -1 602 kHz
(with the interval set at
9 kHz)
(with the interval set at
9 kHz)
530 - 1 710 kHz
(with the interval set at
10 kHz)
US Model
Canadian Model
E Model
Australian Model
HCD-EP30
AEP Model
UK Model
HCD-EP30/EP40
General
Power requirements
US, Canadian models:120 V AC, 60 Hz
AEP, UK models:230 V AC, 50/60 Hz
Australian model:230 V AC, 50/60 Hz
Mexican model:120 V AC, 60 Hz
Argentine model:220 V AC, 50/60 Hz
Taiwan model:110 V AC, 60 Hz
Other models:230 V AC, 50/60 Hz
Power consumption
US model:25 W
Canadian model:25 W
AEP, UK models:30 W
Other models:30 W
Dimensions (w/h/d):
Mass:Approx. 2.8 kg
Design and specifications are subject to change
without notice.
0.9 W (in the standby
mode)
Approx. 145 × 238 × 238 mm
9-873-867-11Sony Corporation
2001D0500-1Home Audio Company
C 2001.4Shinagawa Tec Service Manual Production Group
7-2. Front Panel Section-1...................................................... 27
7-3. Front Panel Section-2...................................................... 28
7-4. CD Cabinet Section......................................................... 29
8.ELECTRICAL PARTS LIST ............................... 30
2
Page 3
HCD-EP30/EP40
r
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be damaged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C during repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
SAFETY CHECK-OUT
After correcting the original service problem, perform the following safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
LEAKAGE TEST
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes.).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester , such as the Simpson 229 or RCA
WT -540A. Follo w the manufacturers’ instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The “limit” indication is 0.75 V, so analog meters must have an accurate lowvoltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V A C range are suitable. (See Fig. A)
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation exposure.
This appliance is classified as
a CLASS 1 LASER product.
The CLASS 1 LASER
PRODUCT MARKING is
located on the rear exterior.
The following caution label is located inside the unit.
To Exposed Metal
Parts on Set
1.5 k
0.15 µF
Fig. A. Using an AC voltmeter to check AC leakage.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED
LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
Ω
Earth Ground
AC
voltmete
(0.75 V)
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS P AR UNE MARQ UE 0
SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
3
Page 4
HCD-EP30/EP40
SECTION 1
SERVICING NOTES
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 flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused
on the disc reflective surface by the objective lens in the optical
pick-up block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objectiv e lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
1. Press the I/1 button to the power ON with no disc inserted
and press the [CD] button.
2. Open the lid for CD.
3. Turn on SW600 as following figure.
4. Confirm the laser diode emission while observing the objecting lens. When there is no emission, Auto Power Control circuit or Optical Pick-up is broken.
Objective lens moves up and down five times for the focus
search.
• MODEL IDENTIFICATION
– Bottom View –
PART No.
MODELPART No.
EP30: AEP and UK models4-235-167-0
US and Canadian models4-235-169-0
Singapore model4-235-170-0
Australian model4-235-171-0
Taiwan model4-235-172-0
Mexican model4-235-173-0
Argentina model4-235-174-0
EP40: AEP and UK models4-235-175-0
Saudi Arabia model4-236-316-0
[]
[]
[]
[]
[]
[]
[]
[]
[]
SW600
TO PREVENT ‘T APE OSCILLATION SOUND AT V OLUME’
MAXIMUM SETTING (W/O TAPE)
Headphone wire dressing:
a.) Draw the wire from Main board to Headphone Jack board along
the bottom side of heatsink.
b.) The wire must be kept away from the top side of Cassette board
at least 30 mm.
MAIN board
heatsink
HEADPHONE
board
CASSETTE board
at least 30 mm
4
Page 5
LOCATION OF CONTROLS
– Front Panel –
SECTION 2
GENERAL
1 2 34567
HCD-EP30/EP40
This section is extracted from
instruction manual.
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, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
• Torque Measurement
ModeTorque MeterMeter Reading
FWDCQ-102C(30 – 70 g•cm)
FWD
Back Tension
FFCQ-201B(more than 60 g•cm)
REWCQ-201B(more than 60 g•cm)
CQ-102C(1.5 – 5.5 g•cm)
• Tape T ension Measurement
ModeTension MeterMeter Reading
FWDCQ-403A
2.95 – 6.86 mN•m
(0.42 – 0.97 oz•inch)
0.15 – 5.39 mN•m
(0.021 – 0.076 oz•inch)
more than 5.89 mN•m
(more than 0.83 oz•inch)
more than 5.89 mN•m
(more than 0.83 oz•inch)
more than 100 g
(more than 3.53 oz)
PRECAUTION
1. Setting
MEGA BASS switch : OFF
TAPE DECK SECTION0 dB=0.775 V
Test tape
TypeSignalUsed for
WS-48A3 kHz, 0 dBTape Speed Adjustment
P-4-A0636.3 kHz, –10 dBHead Azimuth Adjustment
Tape Speed Adjustment
Setting:
Function: TAPE
test tape
WS-48A
(3 kHz, 0 dB)
set
Procedure:
1. Playback WS-48A (tape center) in the FWD state.
2. Adjsut the volume in CAPST AN/REEL motor (M201) so that
the frequency counter reading becomes 3,000 Hz.
Specified Value: 2,985 to 3,015 Hz
3. Confirm that the frequency at the beginning and that at the
end of tape winding are between 2,955 to 3,045 Hz.
frequency counte
32
Ω
+
–
HEADPHONE board
PHONES jack (JK401)
Adjustment Location:
11
Page 12
HCD-EP30/EP40
Record/Playback Head Azimuth Adjustment
Procedure:
1. Mode: Playback (FWD)
test tape
P-4-A063
(6.3 kHz, –10 dB)
set
HEADPHONE board
PHONES jack (JK401)
32
level meter
Ω
+
–
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.
Output
level
within
1dB
L-CH
peak
R-CH
peak
within
1dB
Screw
position
L-CH
peak
Screw
position
R-CH
peak
Adjustment Location:Record/Playback/Erase Head.
Note: Refer to “3-7. CASSETTE LID” (see page 10)
3. Mode: Playback (FWD)
test tape
P-4-A063
(6.3 kHz, –10 dB)
L-CH
set
R-CH
in phase
32
32
HEADPHONE board
PHONES jack (JK401)
screen pattern
45
°
90
goodwrong
Ω
Ω
135 °180
°
oscilloscope
V
H
+
+
–
–
°
4. Repeat step 1 to 3 in playback (REV) mode.
5. After the adjustments, apply suitable locking compound to the
parts adjusted.
12
Page 13
HCD-EP30/EP40
)
)
TUNER SECTION0 dB=1 µV
[AM]
Setting:
Function: TUNER
Band switch: AM
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
[FM]
Setting:
Function: TUNER
Band switch: FM
FM RF signal
generator
22.5 kHz frequency
deviation by 400 Hz
signal
Output level: as low as possible
Put the lead-wire
antenna close to
the set.
set
MAIN board
0.01 µF
FM ANT
set
level meter
32
Ω
+
–
HEADPHONE board
PHONES jack (JK401
level meter
32
Ω
+
–
HEADPHONE board
PHONES jack (JK401
no mark: US, Canadian, E, Australian models
< > : AEP, UK models
AM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
Confirmation
T102
Adjust for a maximum reading on level meter
L110600 kHz <603 kHz>
TC1021,400 kHz <1,404 kHz>
FM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
L10487.6 MHz2.1 ± 0.2 V
Confirmation108 MHz7.0 ± 0.4 V
Adjust for a maximum reading on level meter
L10389.9 MHz
TC101105.9 MHz
530 kHz
<531 kHz>
1,710 kHz7.7 ± 0.3 V
<1,602 kHz><7.3 ± 0.3 V>
AM TRACKING ADJUSTMENT
FM TRACKING ADJUSTMENT
1.5 ± 0.2 V
Adjustment Location: MAIN board (See page 14)
digital voltmeter
MAIN board
TP10 (FM VT)
TP11 (AM VT)
100 k
Ω
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
13
Page 14
HCD-EP30/EP40
t
Adjustment Location and Connecting Points
– MAIN BOARD (Component Side) –
L104 FM Frequency
Coverage Adjustment
T102
AM Tracking
}
TP10
(FM VT)
TC102
L110Adjustment
AM Frequency Coverage Adjustment
– MAIN BOARD (Conductor Side) –
L103
TC101
IC101
TP11
(AM VT)
FM Tracking Adjustmen
}
14
Page 15
SECTION 6
DIAGRAMS
HCD-EP30/EP40
6-1.NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Printed Wiring Board:
• W : indicates side identified with part number.
•: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1/
specified.
• 2 : nonflammable resistor.
• C : panel designation.
Note:
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part
number specified.
• A : B+ Line.
• H : adjustment for repair.
• Voltages are taken with a 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
E: T APE PLAY
a : RECORD
J: CD PLAY
• Abbreviation
AUS : Australian model
CND : Canadian model
4
Note:
Les composants identifiés par
une marque 0 sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce portant le numéro
spécifié.
• Circuit Boards Location
MAIN board
W or less unless otherwise
HEADPHONE board
POWER board
CASSETTE boardDISPLAY board
1515
Page 16
HCD-EP30/EP40
6-2.SCHEMATIC DIAGRAM – MAIN Board (1/2) –• See page 23 for Waveforms.• See page 24 for IC Block Diagrams.
FM
LEAD
ANTENNA
ANT1
FM ANT
75Ω
COAXIAL
MAIN BOARD
C104
0.001
C157
0.1
1N4148TP
1N4148TP
0.047
AM FERRITE-ROD
(1/2)
L103, TC101
FM TRACKING
C105 0.001
L103
FM RF
1µH
ANTENNA
AM OSC
0.047
1
(0)
1.3
+
L104
FM FREQUENCY
COVERAGE
0.001
5.2 (0)
1.3
5.2 (6.2)
50V
C111
0.001
L104 FM OSC
5.2 (6.2)
5.2 (6.2)
5.2 (6.2)
2.8 (3.6)
0.0015
50V
0 (6.2)
+
0 (0.7)
1.2 (0.4)
0
5.2
(6.2)
TP10
(FM VT)
1.3
5.2
10.7MHz
R112
3.3k
2SC1923
0.0015
(6.2)
1.2k
1.3
Q101
FM OSC BUFFER
5.4
(0.1)
10V
0
4.5 (4.3)
4.5 (0.1)
1.3
1.3
450kHz
+
4.5 (5.6)
10.7MHz
0.3 (0.5)
3.9k
3.9k
2.2P
0.01
0.001
4.5 (4.3)
4.5 (4.3)
IC101
FM/AM IF AMB
MIX, MPX, DET, OSC
IC B/D
IC102
FM/AM PLL
IC B/D
0.01
50V
5.6k
+
2.2k
+
0.1
1
+
50V
+
50V
0
50V
+
+
+
(0.4)
50V
0.2
BUFFER
(5.4)
3.3k
5.2
0.0033
0.0033
Q103
STEREO/MONO
SWITCHING
0 (0.7)
4.5 (0.1)
+
50V
50V
+
470
16V
Q102
FM/AM BAND
SELECT SWITCH
0.047
6.8k
6.8k
100p
0
4.7k
0
1µH
Q116, 209, 210
TUNER B+ SWITCH
Q109, 605
B+ SWITCH
0.1
0.001
0.022
0 (2.6)
2.6 (0)
0.1 (3.1)
5.6k
5.1
0.9
0
5.4
2.6
0.9
2.4 (1.5)
2.5
0.1
0.1
10V
+
5.4
7.2MHz
0
0
0.1
+
16V
9.2
0.7
MTZJ-5.1
9.3
8.5
0
CN101
8P
RDSCL
RDSDA
PLLCE
PLLDI
PLLCL
STOUT
SIG
CT
A
DSIPLAY
BOARD
(Page 21)
L110, TC102
AM TRACKING
T102
AM FREQUENCY
COVERAGE
TP11
(AM VT)
0.022
0.022
+
0
2.4
4.5
MUX
VREF
VSS1
VDD1
VDD2XIXONCRCLK
1.6
4.5
+
2.2
16V
50V
2.4
*
RDAT
QUAL
2
2.2
2.2
U
4
u
5.6
4.7k
5.4
2SD1616-L
4.8
100µH
+
0.1
IC604
RDS DECODER
EP40
U
U
U
2
3
1
u
u
u
IC B/D
0.1
1
2.4
MAIN BOARD
(2/2)
0
CMP
VSS3
T2T1VSS2
(Page 17)
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
() : AM
: Impossible to measure
∗
1616
Page 17
6-3.SCHEMATIC DIAGRAM – MAIN (2/2)/HEADPHONE Boards –• See page 24 for IC Block Diagram.
MAIN BOARD
(1/2)
(2/2)
2200p
(Page 16)
4700p
U
4
u
3.3k
3.3k
0.0033
0.1
0.1
0.1
0.0082
5.3
4.8
7.8
3.9
0.1
+
16V
0
0
0
0
0.0082
0.1
0.1
0.1
0.0033
0.047
8.2k
5.6k
0.0039
0.027
3.9
3.9
3.9
3.6
3.6
3.9
3.9
0.027
0.0039
5.6k
0.047
3.9
8.2k
MTZJ-6.2B
3.9
3.9
3.9
3.9
13.5
2SD1616-L
+
Q312
+6V REGULATOR
3.9
3.9
3.9
5.66.2
(Page 19)
M201
(CAPSTAN/REEL)
B
CASSETE
BOARD
S201
(PLAY)
BEAT
GND
SYNC
COTR
1
U
U
U
1
2
3
u
u
u
CN201
9P
RL
RR
PL
PR
9V
16V
0.1
CN202
4P
MAIN BOARD
0.047
3.9k
3.9k
Q201, 202
REC AMP
+
+
2.1
1.4
1.4
2.1
+
1.9
50V
1.9
+
1 50V
+
16V
IC203
FUNCTION SELECT SWITCH,
ELECTRICAL VOLUME
IC B/D
4.7
50V
+
+
50V
+
3.9
50V
3.9
3.9
+
50V
+
4.7
50V
+
1N4148TP
4.7
50V
0.001
+
6.8k
8.2k
6.8k
50V
0.001
Q205, 206
MEGA BASS
ON DRIVE
8.2k
50V
0.022
+
3.3k
2.2k
4.7k
4.7k
2.2k
3.3k
+
9.3
9.9
+
50V
+9V REGULATOR
0
MEGA BASS
ON : 0.1
OFF : 0.7
MEGA BASS
ON : 0.1
OFF : 0.7
0
13.7
Q313
CD –SW
6V
+
MTZJ-10B
(Page 21)
DISPLAY
C
TU –SW
TA –SW
1N4148TP
+
10V
BOARD
LED V+
0.022
GND
PSW
MUTE
9K/10K
0.8 (9.5)
1N4148TP
+
9P
1N4148TP
1N4148TP
50V
2SD1616-L
+
2SD1616-L
+9V REGULATOR
0.8
(10)
13.6
(0)
REGULATOR CONTROL
1N4148TP
0 [0.6]
0
0
0 [0.6]
Q301, 302
MUTING
Q308, 309
13.7
0.6 (13.6)
4.7k
MTZJ-10B
Q310, 311
SWITCH
[0.6]
9P
0
BEAT
SYNC
MUTING CONTROL
SWITCH
0 [1.1]
13.7
13.6
(12.9)
0
(0.7)
(Page 21)
DISPLAY
D
BOARD
CE
DBBS
Q314
1N4148TP
0.001
+
+
0.001
50V
0.6
(0)
CLK
HCD-EP30/EP40
SUPPLIED AS THE
CD
*
*
ASSEMBLED BLOCK
BLOCK
CDDATA
CDCLK
CDRS
DAT
9P
2200p
+
16.1
8.7
8.7
16.1
++
0.1
1N4148TP
AM FREQ STEP
10 kHz
R
9 kHz
+
25V
25V
2.7k
2.7k
IC301
POWER AMP
50V
0
+
0.6
16V
16V
0.6
+
0
16.4
1N4148TP
0.022
HEAT OPERATION
PROTECTION CIRCUIT
+
13.7
13
0.3
B+ SWITCH
BIAS CIRCUIT,
Q305, 306
+
8.7
+
–
–
+
16.7
13.7
+
0.7
50V
HEADPHONE BOARD
5
CN301
5P
0.15
0.15
+
1N4148TP
1N4148TP
1
2
3
4
5
6
7
1
+
–
–
+
6
1
PHONES
DC_15V
R
L
SPEAKER
IMPEDANCE
USE 4Ω
POWER
BOARD
(Page
E
CN402
22)
• Voltages are dc with respect to ground under no-signal
(detuned) conditions.
no mark : TUNER (FM/AM)
() : CD PLAY
[] : TAPE PLA Y
6-7.PRINTED WIRING BOARD – DISPLAY Board –• See page 15 for Circuit Boards Location.
1234567
DISPLAY BOARD
A
IC603
136
13
D621
LIQUID CRYSTAL DISPLAY
180
IC601
20
(AEP, UK)
K
K
A
SW613
TUNER
K
ECB
KA
21
40 41
A
US, CND,
E, AUS
US, CND,
E, AUS
+–TUNING
M >m .
D
B
C
MAIN BOARD
CN302
C
(Page 18)
SW614
MUSIC MENU
SW631
(MONO STEREO)
ST t MONO
ISS
2 t 1
SW600
Z PUSH
OPEN/CLOSE
SW622SW621
+–VOLUME
MEGA BASS
A
A
A
+
IC602
K
98
K
K
+
116
KA
A
12
K
A
KA
KA
TIMERD619
I/1
REM601
US,
13
BCE
A
A
K
K
ECB
+
K
A
+
AEP, UK,
E, AUS
ECB
K
A
K
US, CND,
E, AUS
A
REPEAT
A
MAIN BOARD
CN101
(Page 18)
SW601 – 615
61
60
+
REMAIN
CD
K
A
TAPE
CND
A
K
E
+–
D
MAIN BOARD
CN204
(Page 18)
F
(INCLUDED IN DISPLAY BOARD)
R421
D19D18
R420
D17D16D15D14D12
D11 – 19
(LCD BACK LIGHT)
(EP40)
PRESETSHUFFLE
SW608
TUNER DSPL
x
R419
D13
D11
2020
21
SW610
RDS
u
TUNER MEM
ENTER PGM
(EP40)
Page 21
6-8.SCHEMATIC DIAGRAM – DISPLAY Board –• See page 23 for Waveform.
DISPLAY BOARD
HCD-EP30/EP40
A
MAIN
BOARD
(1/2)
CN101
(Page 16)
SEL2215S-CD
D619
TIMER
D604
1N4148AP
1N4148TP
1N4148TP
1N4148TP
1N4148TP
1.8k
2.4
0 (4.7)[4.7]
1.4 (0)[1.4]
(AEP, UK)
0
2.4
0 (4)[0]
0 0.6
1.8k
LIQUID CRYSTAL DISPLAY
2.4
2.4
S31
S30
S29
S28
S27
S26
S25
S24
S23
S22
S21
S20
S19
S18
S17
S16
S15
COM0
2.4
COM1
COM2
COM3
4.7
BIAS
4.7
VLC0
3.2
VLC1
1.6
VLC2
TUNER
TAPE
CD
4.6
TIMER STATUS
VSS
4.6
CD RESET
4.5
SURROUND
0
PLL CL
5.3
PLL DI
5.2
TUNER SD
4.7
CLOCK
5.3
DATA
CD CLOCK
STEREO
5.2
2.2
5.3
SYSTEM CONTROLLER
LIQUID CRYSTAL DISPLAY DRIVER
UPD753016AGC-F31-3B9
MUTE
SYNCRO
REMOTE
RDS CLOCK
0
0
5.2
0 {3.5}
PLLCE
0
IC601
MEGA BASS
ON : 0.1
OFF : 4.7
SHRST
CE
*
D616
1N4148TP
2.4
PSW
RDS DATA
4.7
DPSW2/SLEND
BASS BOOST
0
4.7
VDD
S14
12/24H SELECT
X1ICXT2
XT1
4.7
2.4
2.9
+
10
16V
S13
CPU RESET
KEY R3
KEY R2
KEY R1
KEY R0
CD
PLLDO
SELECT
DATA
X2
0.1
S12
S11
S10
S9
S8
S7
S6
S5
S4
S3
S2
S1
S0
NC
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
5.6
5.2
5.2
5.2
5.2
4.3
4.6
5.2
0.1
2.4
(US, CND, E, AUS)
1
+
1000
6.3V
1N4148TP
IC603
RESET SIGNAL
GENERATOR
IC603
P5290
5.6
O
G
0.0022
I
16V
SW601
I /1
5.6
SW621
SW622
SW612
TAPE
SW621 SW622
–
VOLUME
+
SW605
SW606
SW605 SW606
–
PRESET
SW609
TUNING –
. m
TUNING +
M >
1N4148TP
1N4148TP
1N4148TP
1N4148TP
SW607
SW604
TUNER MEM
ENTER PGM
5.3
5.3
5.3
5.3
5.3
4.7
5.3
5.3
5.3
SW613
TUNER
SW614
MUSIC
+
MENU
SW615
MEGA
+
BASS
5.3
5.3
5.3
5.3
1N4148TP
1N4148TP
1N4148TP
10V
SW611
REMAIN
CD
SW602
REPEAT
SW603
SHUFFLE
+
0.1
SW608
TUNER DSPL
x
SW610
(EP40)
(EP40)
RDS
u
IC602
(AEP, UK, E, AUS)
(US, CND, E, AUS)
0 5.6
0
0 0.1
0 5.6
(US, CND)
2.2k
4.7
5.2
0.6
0.1
BUFFER
0.6
+
1N4148TP
10V
5.2
5.2
Q602
POWER
ON/OFF
SWITCH
REM601
REMOTE
CONTROL
RECEIVER
REM601
RPM6938
180
180
L934SGC/B
L934SGC/B
L934SGC/B
L934SGC/B
L934SGC/B
KEY CONTROL
L934SGC/B
L934SGC/B
0.1
(MONO STEREO)
ST t MONO
ISS
2 t 1
9
MAIN BOARD (2/2)
C
CN302
(Page 17)
180
0.1
1
9
D
MAIN BOARD (2/2)
CN204
1
0.1
SW600
ZPUSH
OPEN/CLOSE
L934SGC/B
(LCD BACK LIGHT)
L934SGC/B
D11-19
(Page 17)
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
<> : AM (9 kHz STEP)
〈〈〉〉 : AM (10 kHz STEP)
() : CD PLAY
[] : TAPE PLA Y
{ } : RECORD
: Impossible to measure
2121
∗
Page 22
HCD-EP30/EP40
6-9.SCHEMATIC DIAGRAM – POWER Board –
POWER BOARD
Q404
+6V REGULATOR
6.2
8050D
6.7
7.9
TR402
POWER
TRANSFORMER
C421 0.001 250V
E
MAIN BOARD
(2/2)
CN304
(Page 17)
B GND
CN402
6P
+
MTZJ-6.8B
+
++
RL401
0
0.6
C404 0.022
+
(AEP, UK, E, AUS)
3.15A 125V
(US, CND)
C402 0.022
C408 0.022
2A 125V (US, CND)
+
POWER
TRANSFORMER
(AEP, UK, E, AUS)
TR401
2.2k
Q401–403
POWER ON/OFF
RELAY DRIVE
1.1
0.5
2.2k
1.1
1.1
0.7
8050D
AC IN
C406 0.022
• Voltages are dc with respect to ground under no-signal
conditions.
no mark : TUNER (FM/AM)
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.
Les composants identifiés par une marque 0 sont
critiques pour la sécurité. Ne les remplacer que
par une pièce portant le numéro spécifié.
2222
Page 23
HCD-EP30/EP40
6-10. PRINTED WIRING BOARD – POWER Board –• See page 15 for Circuit Boards Location.
1 to 20S12 to S31OSegment drive signal output to the liquid crystal display (D621)
21 to 24 COM0 to COM3OCommon drive signal output to the liquid crystal display (D621)
25BIASOBias output for the liquid crystal display drive
26 to 28VLC0 to VLC2I
29TUNEROPower on/off control signal output for the tuner section “L”: power on
30TAPEOAudio line muting on/off control signal output “L”: muting on
31CDOPower on/off control signal output for the CD section “L”: power on
TIMER STATUS
32
33VSS—Ground terminal
34CD-RESETOReset signal output to the CD section “L”: reset
35SURROUNDONot used (pull up)
36PLL CLOPLL serial data transfer clock signal output to the FM/AM PLL (IC102)
37PLL DIOPLL serial data output to the FM/AM PLL (IC102)
38TUNER SDIFM and AM signal meter voltage detection input from the LA1823 (IC101)
39CLOCKOSerial data transfer clock signal output to the LC75392 (IC203)
40DATAOSerial data output to the LC75392 (IC203)
41STEREOIFM stereo detection signal input from the LA1823 (IC101) “L”: stereo
42CD CLOCKISerial data transfer clock signal input from the CD section
43RDS CLOCKI
44REMOTEIRemote control signal input from the remote control receiver (RM601)
45SYNCROIRecording on detection signal input
46MUTEOAudio line muting on/off control signal output “H”: muting on
47PLLCEOPLL chip enable signal output to the FM/AM PLL (IC102) “H” active
48CEOChip enable signal output to the LC75392 (IC203) “H” active
49SHRSTONot used (open)
50RDS DATAISerial data input from the RDS decoder (IC604) (RDS decoder is HCD-EP40 only)
51PSWOSystem power on/off control signal out “H”: power on
52BASS BOOSTOMega bass on/off selection signal output “H”: mega bass on
53DPSW2/SLENDI
54
55XT1IPower failure detection input terminal “L”: power failure, “H”: power on
56XT2ONot used (open)
57IC—Internal connection terminal (connected to power supply)
58X1IMain system clock input terminal (6 MHz)
59X2OMain system clock output terminal (6 MHz)
60PLLDO SELECTIPLL serial data input from the FM/AM PLL (IC102)
61CD DATAI/OTwo-way data bus with the CD section
62NC—Not used (open)
6312/24H SELECT
64 to 67
68CPU RESETI
69 to 80S0 to S11OSegment drive signal output to the liquid crystal display (D621)
VDD—Power supply terminal
KEY R0 to
KEY R4
Input terminal for doubler circuit capacitor connection to develop liquid crystal display drive
voltage
OLED drive signal output of the TIMER indicator (D619) “L”: LED on
Serial data transfer clock signal input from the RDS decoder (IC604)
(RDS decoder is HCD-EP40 only)
CD lid open/close detection switch (SW600) input terminal “L”: CD lid is closed
I
Not used (fixed at “H”)
IKey return signal input from the key matrix “L” input when key pressing
System reset signal input from the reset signal generator (IC603) “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
25
Page 26
HCD-EP30/EP40
2
SECTION 7
EXPLODED VIEWS
NOTE:
• -XX and -X mean standardized parts, so they
may have some difference from the original
one.
• Color Indication of Appearance Parts
Example:
KNOB, BALANCE (WHITE) . . . (RED)
• Abbreviation
AR : Argentina model
AUS : Australian model
CND: Canadian model
7-1. CABINET SECTION
↑↑
Parts Color Cabinet's Color
EA : Saudi Arabia model
MX : Mexican model
CD cabinet section
5
#1
• Items marked “*” are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering
these items.
• The mechanical parts with no reference number in the exploded views are not supplied.
• Hardware (# mark) list and accessories and
packing materials are given in the last of the
electrical parts list.
SP : Singapore model
TW : Taiwan model
The components identified by mark
0 or dotted line with mark 0 are
critical for safety.
Replace only with part number
specified.
Les composants identifiés par une
marque 0 sont critiquens pour la
sécurité.
Ne les remplacer que par une pièce
portant le numéro spécifié.
6
7
#4
#1
#2
#
8
2
1
3
Ref. No.Part No.DescriptionRemark
13-451-162-00 WASHER
24-235-952-01 AC CORD HOLDER
34-236-194-01 EMBLEM BADGE
5A-4726-713-A MAIN BOARD, COMPLETE (EP40)
5A-4726-786-A MAIN BOARD, COMPLETE (EP30: AEP, UK)
5A-4726-868-A MAIN BOARD, COMPLETE
(US, CND, SP, EA, TW, MX, AR, AUS)
061-555-750-00 CORD, POWER (AEP, UK, EA, SP)
061-696-966-31 CORD, POWER (AUS)
061-783-525-31 CORD, POWER (TRACKING) (TW, MX)
061-783-820-11 CORD, POWER (US, CND)
554-224-104-41 DAMPER
564-236-067-01 CASS LID WINDOW (EP30)
564-236-069-01 CASS LID WINDOW (EP40)
574-235-976-01 CASS LID (EP30)
574-235-979-01 CASS LID (EP40)
584-235-940-01 CASS LID BKT
594-235-981-01 CASS LID SPRING
604-235-941-01 MAIN PWB MOUNTING BKT (A)
1014-235-995-01 RUBBER FOOT
1024-235-975-01 FRONT PANEL (EP30)
1024-235-978-01 FRONT PANEL (RDS) (EP40)
103A-4726-714-A HEADPHONE BOARD, COMPLETE
1044-235-968-01 TAPE KEY CAP
1054-235-946-01 FUNCTION KEY BKT
1064-235-966-01 CD KEY CAP
1074-235-967-01 TUNER KEY CAP
1084-235-963-01 PLAY/STOP KNOB
1094-235-962-01 SKIP/SEARCH KNOB
D118-719-085-51 LED L934SGC/B (LCD BACK LIGHT)
D128-719-085-51 LED L934SGC/B (LCD BACK LIGHT)
D138-719-085-51 LED L934SGC/B (LCD BACK LIGHT)
D148-719-085-51 LED L934SGC/B (LCD BACK LIGHT)
D158-719-085-51 LED L934SGC/B (LCD BACK LIGHT)
D168-719-085-51 LED L934SGC/B (LCD BACK LIGHT)
D178-719-085-51 LED L934SGC/B (LCD BACK LIGHT)
D188-719-085-51 LED L934SGC/B (LCD BACK LIGHT)
D198-719-085-51 LED L934SGC/B (LCD BACK LIGHT)
D6018-719-991-33 DIODE 1SS133T-77
IC1016-700-580-01 IC LA1823
IC1028-759-584-70 IC LC72131
IC2038-759-473-59 IC LC75392
IC3018-759-246-03 IC TA8229K
IC6048-759-557-36 IC BU1924F-E2 (EP40)
The components identified by
mark 0 or dotted line with
mark 0 are critical for safety .
Replace only with part number specified.
Les composants identifiés par une
marque 0 sont critiques pour la
sécurité.
Ne les remplacer que par une pièce
portant le numéro spécifié.
Page 37
MEMO
HCD-EP30/EP40
37
Page 38
HCD-EP30/EP40
REVISION HISTORY
Clicking the version allows you to jump to the revised page.
Also, clicking the version at the upper right on the revised page allows you to jump to the next revised
page.
Ver.DateDescription of Revision
1.02001.04New
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