Sony HCD-E301 User manual

SERVICE MANUAL
COMPACT DISC DECK RECEIVER
AEP Model
SPECIFICATIONS
HCD-E301
Ver 1.1 2002.10
HCD-E301istheamplifier, CD player, tape
deck and tuner section in CMT-E301.
9-873-906-12 Sony Corporation
2002J0500-1 Home Audio Company
C2002.10 Published by Sony Engineering Corporation
Amplifier section
DIN power output (rated) 4.5 + 4.5 W
(4 Ωat 1 kHz, DIN)
Continuous RMS power output (reference)
5 + 5 W
(4 Ωat 1 kHz, 10% THD)
Music power output (reference)
13 + 13 W
CD player section
System Compact disc and digital
audio system
Laser Semiconductor laser
(λ=780 nm)
Emission duration:
continuous
Frequency response 20 Hz - 20 kHz (±0.5 dB)
Tape player section
Recording system 4-track 2-channel stereo
Frequency response 50 - 13 000 Hz (±3 dB),
using Sony TYPE I
cassette
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range 87.5 - 108.0 MHz
Antenna FM lead antenna
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range 531 -1 602 kHz
(with the interval set at
9 kHz)
Antenna Built-in ferrite bar antenna
Intermediate frequency 450 kHz
General
Power requirements 230 V AC, 50/60 Hz
Power consumption 30 W
0.9 W (in the standby
mode)
Dimensions (w/h/d):
Approx. 145 ×238 ×238 mm
Mass: Approx. 2.8 kg
Design and specifications are subject to change
without notice.
CD Model Name Using Similar Mechanism HCD-EP30
Section CD Mechanism Type CS-21SC-1280
TAPE Model Name Using Similar Mechanism HCD-EP30
Section Tape Transport Mechanism Type TCM125-2

2
HCD-E301
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C dur-
ing 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.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED
LINE WITH MARK 0ON 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 PUB-
LISHED BY SONY.
The following caution label is located inside the unit.
This appliance is classified as
a CLASS 1 LASER product.
The CLASS 1 LASER
PRODUCT MARKING is
located on the rear exterior.
TABLE OF CONTENTS
1. SERVICING NOTES ................................................ 3
2. GENERAL ................................................................... 4
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 6
3-2. Front Panel Section ......................................................... 7
3-3. MAIN Board ................................................................... 7
3-4. CD Cabinet Section......................................................... 8
3-5. CD Mechanism Deck (CS-21SC-1280) ......................... 8
3-6. Tape Mechanism Deck (TCM125-2) .............................. 9
3-7. Cassette Lid ..................................................................... 9
4. MECHANICAL ADJUSTMENTS....................... 10
5. ELECTRICAL ADJUSTMENTS......................... 10
6. DIAGRAMS
6-1. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 13
6-2. Schematic Diagram –MAIN Board (1/2) –.................. 14
6-3. Schematic Diagram
–MAIN (2/2)/HEADPHONE Boards –......................... 15
6-4. Printed Wiring Boards
–MAIN/HEADPHONE Boards –.................................. 16
6-5. Printed Wiring Board –CASSETTE Board –............... 17
6-6. Schematic Diagram –CASSETTE Board –.................. 17
6-7. Printed Wiring Board –DISPLAY Board –.................. 18
6-8. Schematic Diagram –DISPLAY Board –..................... 19
6-9. Schematic Diagram –POWER Board –........................ 20
6-10. Printed Wiring Board –POWER Board –..................... 21
6-11. IC Pin Function Description ........................................... 23
7. EXPLODED VIEWS
7-1. Cabinet Section ............................................................... 24
7-2. Front Panel Section-1...................................................... 25
7-3. Front Panel Section-2...................................................... 26
7-4. CD Cabinet Section......................................................... 27
8. ELECTRICAL PARTS LIST ............................... 28

3
HCD-E301
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electro-
static 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 emis-
sion, observe from more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
1. Press the I/1button 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 object-
ing lens. When there is no emission, Auto Power Control cir-
cuit or Optical Pick-up is broken.
Objective lens moves up and down five times for the focus
search.
SECTION 1
SERVICING NOTES
TO PREVENT‘TAPE OSCILLATION SOUND ATVOLUME’
MAXIMUM SETTING (W/OTAPE)
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.
SW600
CASSETTE board
MAIN board
HEADPHONE
board
at least 30 mm
heatsink

4
HCD-E301 SECTION 2
GENERAL This section is extracted from
instruction manual.
LOCATION OF CONTROLS
–Front Panel –
Cassette compartment qd (12)
CD 4(8, 9, 13, 15)
Display Window 5(9, 18)
ENTER/PGM w; (7, 8, 9, 10, 12,
15)
ISS 0(13)
MEGA BASS 8(14)
MONO STEREO 0(11)
MUSIC MENU 9(14)
PHONES jack ws
PRESET +/–qs (10, 11)
REMAIN 4(9)
Remote sensor wk
REPEAT wj (8)
SHUFFLE wa (8)
TAPE 3(12)
TIMER indicator 2(15)
TUNER 6(10, 13, 15)
TUNER MEM w; (10)
TUNING + wd (10, 11)
TUNING –wf (10, 11)
VOLUME control qa (15)
1 2 3456 7
q;
9
8
qa
qs
w;
wa
ws
wd
wf
wg
wh
wj
wk
qd
qfqj qhql qk qg
BUTTON DESCRIPTIONS
@/1 (power) 1(6, 10)
CD
.m(go back) wf (8, 9)
M>(go forward) wd (8, 9)
u(play/pause) wg (8, 9)
ZPUSH OPEN/CLOSE 7(8)
x(stop) wh (8, 9)
TAPE
M (fast forward) qh (12)
X(pause) qf (12, 13)
N(play) qk (12, 15)
z (recording) ql (13)
m (rewind) qj (12)
xZ (stop/eject) qg (12, 13)

5
HCD-E301
CD/REMAIN 3(8, 9, 13, 15)
CLOCK/TIMER/SLEEP SET qf
(7, 15)
MEGA BASS 2(14)
MUSIC MENU w; (14)
PRESET +/–qj (10, 11)
REPEAT qs (8)
SHUFFLE 7(8)
TAPE ql (12)
TIMER ON/OFF qd (15)
TUNER/BAND 5(10, 13, 15)
TUNER MEM/ENTER/PGM 6
(7, 8, 9, 10, 11, 15)
TUNING/CLOCK/TIMER +/–
qk (7, 10, 11, 15)
VOLUME +/–4(15)
BUTTON DESCRIPTIONS
M(fast forward) >(go
forward) 0(8, 9)
.(go back) m(rewind) qa
(8, 9)
u(play/pause) 8(8, 9)
`/1(power) 1(6, 10)
x(stop) 9(8, 9)
Remote Control
1234
5
6
7
8
9
q;
qa
qs
qf
qd
qg
qh
qj
qk
ql
w;
Setting the time
1Turn on the system.
2Press CLOCK/TIMER/SLEEP SET on
the remote.
The clock indication appears.
3Press TUNING/CLOCK/TIMER + or — on
the remote repeatedly to set the time.
4Press ENTER/PGM (TUNER MEM/
ENTER/PGM on the remote).
The clock starts working.
Tip
If you made a mistake, perform from step 2.
To change the preset time
Perform from step 2.
Note
The clock settings are canceled when you disconnect
the power cord or if a power failure occurs.

HCD-E301
6
•This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY
3-4. CD CABINET SECTION
(Page 8)
3-2. FRONT PANEL SECTION
(Page 7)
3-6. TAPE MECHANISM DECK
(TCM125-2)
(Page 9)
3-5. CD MECHANISM DECK
(CS-21SC-1280)
(Page 8)
3-7. CASSETTE LID
(Page 9)
3-3. MAIN BOARD
(Page 7)
SET

HCD-E301
7
3-3. MAIN BOARD
Note: Follow the disassembly procedure in the numerical order given.
3-2. FRONT PANEL SECTION
8 connector
(CN203)
5 two screws
(+K3
× 5)
3 two screws
(BTP2.6
× 10)
1 screw
(BVTP3
× 10)
4 two screws
(BVTP3
× 10
)
5 two screws
(+K3
× 5)
5 two screws
(+K3
× 5)
9 connector
(CN402)
0 connector
(SW600)
qa front panel section
7
2 antenna cover cabinet
6 claw
6 connector
(CN202)
5 connector
(CN201)
4 connector
(CN302)
3 connector
(CN301)
2 connecto
r
(CN101)
1 connector
(CN204)
9 MAIN board
7 screw
(+BTP2.6 × 8)
8

HCD-E301
8
3-4. CD CABINET SECTION
3-5. CD MECHANISM DECK (CS-21SC-1280)
1 two screws
(BTP2.6
× 8
)
2 CD cabinet section
1 two screws
(BVTP3 × 10)
2 plastic cover
7 vibration proof rubber
(pink)
7 vibration proof rubber
(pink)
4 four fiber washers
3 four pulley screws
7 vibration proof rubber
(brown)
7 vibration proof rubber
(brown)
8 CD mechanism deck (CS-21SC-1280)
5
6 two spring clamps
6 two spring clamps

HCD-E301
9
3-6. TAPE MECHANISM DECK (TCM125-2)
3-7. CASSETTE LID
4 cassette board
3
1 connector
(CN701)
2 two screws
(BTP2.6
× 6)
6 two screws
(BVTP3
× 10)
6 two screws
(BVTP3
× 10)
7 tape mechanism deck
(TCM125-2)
5 Open the cassette lid.
1 Open the cassette lid.
3 cassette lid
2 claw
2 claw

10
HCD-E301 SECTION 4
MECHANICAL ADJUSTMENTS SECTION 5 ELECTRICAL ADJUSTMENTS
Tape Speed Adjustment
Setting:
Function: TAPE
Procedure:
1. Playback WS-48A (tape center) in the FWD state.
2. Adjsut the volume in CAPSTAN/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.
Adjustment Location:
PRECAUTION
1. Setting
MEGA BASS switch : OFF
TAPE DECK SECTION 0 dB=0.775 V
Test tape
Type Signal Used for
WS-48A 3 kHz, 0 dB Tape Speed Adjustment
P-4-A063 6.3 kHz, –10 dB Head Azimuth Adjustment
frequency counte
r
test tape
WS-48A
(3 kHz, 0 dB)
set
HEADPHONE board
PHONES jack (JK401)
–
+
32
Ω
CAPSTAN/REE
L
motor (M201)
Tape Speed
Adjustment
Mode Tension Meter Meter Reading
FWD CQ-403A more than 100 g
(more than 3.53 oz)
•TapeTension Measurement
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 demagne-
tizer. (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
Mode Torque Meter Meter Reading
2.95 –6.86 mN•m
FWD CQ-102C (30 –70 g•cm)
(0.42 –0.97 oz•inch)
0.15 –5.39 mN•m
FWD CQ-102C (1.5 –5.5 g•cm)
Back Tension (0.021 –0.076 oz•inch)
more than 5.89 mN•m
FF CQ-201B (more than 60 g•cm)
(more than 0.83 oz•inch)
more than 5.89 mN•m
REW CQ-201B (more than 60 g•cm)
(more than 0.83 oz•inch)

11
HCD-E301
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.
3. Mode: Playback (FWD)
4. Repeat step 1 to 3 in playback (REV) mode.
5. After the adjustments, apply suitable locking compound to the
parts adjusted.
Screw
position
L-CH
peak
within
1dB
Output
level
L-CH
peak
R-CH
peak
within
1dB
Screw
position
R-CH
peak
test tape
P-4-A063
(6.3 kHz, –10 dB)
L-CH
R-CH HEADPHONE board
PHONES jack (JK401)
oscilloscope
VH
++
––
screen pattern
in phase good wrong
45 °
90 °
135 ° 180 °
32 Ω
32 Ω
set
Record/Playback Head Azimuth Adjustment
Procedure:
1. Mode: Playback (FWD)
level meter
test tape
P-4-A063
(6.3 kHz, –10 dB)
set
HEADPHONE board
PHONES jack (JK401)
32
Ω
+
–
Adjustment Location:Record/Playback/Erase Head.
Note: Refer to “3-7. CASSETTE LID”(see page 9)

12
HCD-E301
Adjustment Location and Connecting Points
–MAIN BOARD (Component Side) –
L104 FM Frequency
Coverage Adjustment
T102
AM Frequency Coverage Adjustment
TC102
}
AM Tracking
L110 Adjustment
L103 FM Tracking
TC101
}
Adjustment
–MAIN BOARD (Conductor Side) –
TP10
(FM VT) TP11 (AM VT)
IC101
AM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
Confirmation 531 kHz 1.5 ±0.2 V
T102 1,602 kHz 7.3 ±0.3 V
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L110 603 kHz
TC102 1,404 kHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
L104 87.6 MHz 2.1 ±0.2 V
Confirmation 108 MHz 7.0 ±0.4 V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L103 89.9 MHz
TC101 105.9 MHz
TUNER SECTION 0 dB=1 µV
[AM]
Setting:
Function : TUNER
Band switch: AM
[FM]
Setting:
Function : TUNER
Band switch: FM
•Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
Put the lead-wire
antenna close to
the set.
+
–
level meter
set
32 Ω
HEADPHONE board
PHONES jack (JK401
)
FM RF signal
generator
22.5 kHz frequency
deviation by 400 Hz
signal
Output level: as low as possible
+
–
level meter
set
32 Ω
0.01 µ F
MAIN board
FM ANT
HEADPHONE board
PHONES jack (JK401
)
digital voltmeter
100 k Ω
MAIN board
TP10 (FM VT)
TP11 (AM VT)

HCD-E301
1313
SECTION 6
DIAGRAMS
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 Ωand 1/4W or less unless otherwise
specified.
•2: nonflammable resistor.
•C: panel designation.
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.)
•A: B+ Line.
•H: adjustment for repair.
• Voltages are taken with aVOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F: FM
f: AM
E:TAPE PLAY
a: RECORD
J: CD PLAY
6-1. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS •Circuit Boards Location
MAIN board
HEADPHONE board
CASSETTE board DISPLAY board
POWER board
Note: The components identified by mark 0or dotted line
with mark 0are critical for safety.
Replace only with part number specified.

HCD-E301
1414
IC B/D IC B/D
MAIN BOARD
(2/2)
1
DSIPLAY
BOARD
A
1
4.5 (4.3)
L110, TC102
AM TRACKING
T102
AM FREQUENCY
COVERAGE
L103, TC101
FM TRACKING
L104
FM FREQUENCY
COVERAGE
0 (0.7)
5.4
(0.1)
0
1
(0)
5.2 (0) 5.2 (6.2) 5.2 (6.2) 0 (6.2)
1.3 1.3
1.2 (0.4)
4.5 (0.1)
4.5 (4.3)
4.5 (5.6)
4.5 (4.3)
0
4.5 (0.1)
0 (0.7)
0.2
(0.4)
5.2
(5.4)
1.3 1.3
5.2 (6.2)
5.2 (6.2)
2.8 (3.6)
0
5.2
(6.2)
5.2
(6.2)
1.3 1.3
0.3 (0.5)
0
0 (2.6)
2.6 (0)
5.1
0.9
0.9 2.4 (1.5)
2.6
2.5
0.1
0.1
5.4
0
0.1 (3.1)
0
9.3
9.2
8.5
0.7
0
0
FM
LEAD
ANTENNA
ANT1
FM ANT
75Ω
COAXIAL
C157
0.1
C104
0.001
L103
FM RF
C105 0.001
L104 FM OSC
C111
0.001
TP10
(FM VT)
R112
3.3k
+
10V
0.001
0.01
1.2k
0.001
+
50V
0.015 0.015 3.9k +
+
3.9k
50V
50V
6.8k 6.8k
0.0033 0.0033
++
+
50V
3.3k
50V
50V
Q103
STEREO/MONO
SWITCHING
Q102
FM/AM BAND
SELECT SWITCH
Q101
FM OSC BUFFER IC101
FM/AM IF AMB
MIX, MPX, DET, OSC
IC102
FM/AM PLL
4.7k
100p
0.001
0.022
5.6k
0.01
2.2k
50V 5.6k
+
+0.1
0.1
7.2MHz
+
MTZJ-5.1
+
10V
1µH
Q116, 209, 210
TUNER B+ SWITCH
0.1
CN101
8P
0.047
AM FERRITE-ROD
ANTENNA
1µH
AM OSC
0.047
+
50V
TP11
(AM VT)
0.022 0.022
10.7MHz
450kHz +
50V
BUFFER
+
0.047
MAIN BOARD (1/2)
1N4148TP
1N4148TP
U
1
u
U
2
u
U
3
u
U
4
u
2SC1923
2.2P
10.7MHz
16V
RDSCL
RDSDA
PLLCE
PLLDI
PLLCL
STOUT
SIG
ST
470
16V
18P
4.7k
6-2. SCHEMATIC DIAGRAM – MAIN Board (1/2) – • See page 21 forWaveform. •See page 22 for IC Block Diagrams.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
( ) : AM
(Page 19)
(Page 15)

HCD-E301
1515
IC B/D
POWER
BOARD
CN402
E
CASSETE
BOARD
B
MAIN BOARD
(1/2)
1
DISPLAY
BOARD
D
DISPLAY
BOARD
C
9P 9P
5.3 4.8 7.8
0
0
3.6
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9 3.9
3.6
0
0
3.9
0.1
1.9
1.4
2.1
1.9
2.1
1.4
5.66.2
13.5
9.9
9.3 13.7
0
MEGA BASS
ON : 0.1
OFF : 0.7
0
MEGA BASS
ON : 0.1
OFF : 0.7
0.8 (9.5) 13.7
0.8
(10)
0.6 (13.6) 13.7
13.6
(12.9)
13.6
(0)
0
(0.7)
0.6
(0)
13.7 13.7
13
0.3
0.7
0
0 [0.6]
0
0 [0.6]
0
[0.6]
0 [1.1]
0
16.4
0.6
0.6
016.1
8.7
8.7
16.1
16.7
8.7
CN201
9P
3.9k
3.9k
50V
+
+
1 50V
Q201, 202
REC AMP
+
++
4700p
+
0.1
0.1
0.1
0.0082
0.0039
0.0033 0.047
8.2k
0.027
0.1
0.1
0.1
0.0082
0.0039
5.6k
8.2k
0.027
0.047
0.0033
+
4.7
50V +
50V
6.8k
0.001
8.2k
4.7
50V
+
+50V
+
+
50V
50V
4.7
50V 6.8k
8.2k
0.001
4.7k
4.7k
2.2k
3.3k
2.2k
3.3k
50V
+
IC203
FUNCTION SELECT SWITCH,
ELECTRICAL VOLUME
MTZJ-6.2B
Q312
+6V REGULATOR
+0.022
50V
++
10V
MTZN-10B
Q313
+9V REGULATOR
+
0.022
+
MTZN-10B
4.7k
Q310, 311
REGULATOR CONTROL
SWITCH
Q305, 306
B+ SWITCH
0.022
+
50V
+
DC_15V
0.1
+
+
50V
Q301, 302
MUTING
Q308, 309
+9V REGULATOR
0.001
+16V
+
16V
+
50V
0.001
50V
+
Q314
MUTING CONTROL
SWITCH
IC301
POWER AMP
+
25V
+
+
0.15
0.15
++
25V
PHONES
CN301
5P
+
–
+
–
R
L
SPEAKER
IMPEDANCE
USE 4Ω
+
–
+
–
BIAS CIRCUIT,
HEAT OPERATION
PROTECTION CIRCUIT
MAIN BOARD (2/2)
CN202
4P
M201
(CAPSTAN/REEL)
S201
(PLAY) 0.1
+
Q205, 206
MEGA BASS
ON DRIVE
1N4148TP
1N4148TP
1N4148TP
1N4148TP
1N4148TP
1N4148TP
1N4148TP
U
1
u
U
2
u
U
3
u
U
4
u
BEAT
RL
RR
GND
PL
PR
9V
SYNC
COTR
0.047
2200p
16V
16V
16V
5.6k
2SD1616-L
+
2SD1616-L
2SD1616-L
1N4148TP
1N4148TP
1N4148TP
1N4148TP
2.7k
2.7k
2200p
9P
*CD
BLOCK
*SUPPLIED AS THE
ASSEMBLED BLOCK
CDDATA CDCLK CDRS DAT CLK CE DBBS BEAT SYNC
9K/10K MUTE PSW GND LED V+ TU –SW TA –SW CD –SW 6V
6
1
1
2
3
4
5
6
7
51
HEADPHONE BOARD
3.3k
3.3k
SPK301
6-3. SCHEMATIC DIAGRAM –MAIN (2/2)/HEADPHONE Boards –•See page 22 for IC Block Diagram.
•Voltages are dc with respect to ground under no-signal
(detuned) conditions.
no mark : TUNER (FM/AM)
( ) : CD PLAY
[ ] : TAPE PLAY
(Page 17)
(Page 14)
(Page 19) (Page 19)
(Page
20)

HCD-E301
1616
MAIN BOARD
L110
AM FERRITE-ROD
ANTENNA
AKA
KA
T102
AM
OSC L103
FM RF
+
123
BCE
ECB
ECB
+
+
++
+
+
+
+
+
AK
+
+
KA
TP10
(FM VT)
TP11
(AM VT)
BCE
ECB
ECB ECB
++
+
+
+
+
+
++
++
++
++
+
+
+
++
+
+
++
+
+
++
+
++
+
+
++
FM LEAD
ANTENNA
FM ANT
75Ω
COAXIAL
ANT101
ECB
ECB
ECB
ECB
BCE
ECB ECB
BCE
BCE BCE
ECB
ECB
BCE
ECB
BCE
*CD
BLOCK
*SUPPLIED AS THE
ASSEMBLED BLOCK
SPEAKER
(IMPEDANCE USE 4Ω)
SPK301
+
–
+
–
L
R
AK
K
A
K
K
K
A
A
K
A
A
KK
K
K
K
K
A
A
A
A
K
A
A
A
A
K
IC101
IC102
IC203
IC301
AKAK
U04
FM OSC
1
6
E
POWER BOARD
CN402
S201
(PLAY)
M201
(CAPSTAN/REEL)
M
2
1
3
4
C
B
DISPLAY
BOARD
CASSETTE
BOARD
ADISPLAY
BOARD
DDISPLAY
BOARD
R413
HEADPHONE BOARD
R412
JK401
PHONES
3
4
5
6
1
2
7
15
A
B
C
D
E
F
G
H
I
1 2 3 4 5 6 7 8 9 10
6-4. PRINTED WIRING BOARDS –MAIN/HEADPHONE Boards –•See page 13 for Circuit Boards Location.
•Semiconductor
Location
Ref. No. Location
D101 B-4
D102 B-5
D103 B-8
D104 C-9
D105 B-5
D302 G-6
D303 G-6
D306 F-6
D307 H-8
D308 G-7
D310 H-8
D311 H-8
D312 F-6
D314 F-7
D316 F-6
D317 H-8
IC101 B-9
IC102 D-8
IC203 D-5
IC301 G-5
Q101 D-9
Q102 C-10
Q103 B-10
Q104 A-10
Q116 D-10
Q201 D-4
Q202 E-4
Q205 F-4
Q206 D-4
Q209 E-8
Q210 E-9
Q301 F-5
Q302 F-6
Q305 H-6
Q306 G-7
Q308 H-7
Q309 H-7
Q310 G-8
Q311 G-7
Q312 G-7
Q313 H-7
Q314 G-6
ZD103 E-9
ZD302 H-7
ZD304 H-6
ZD305 G-7
(Page 18)
(Page 18)
(Page 17)
(Page 18)
(Page 21)

HCD-E301
1717
6-5. PRINTED WIRING BOARD –CASSETTE Board –•See page 13 for Circuit Boards Location. 6-6. SCHEMATIC DIAGRAM –CASSETTE Board –
•See page 21 forWaveforms. •See page 22 for IC Block Diagram.
•Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : TAPE PLAY
( ) : RECORD (ISS 1)
[ ] : RECORD (ISS 2)
IC701
+
A
K
+
+
+
+
+
+
+
+
+
++
BCE
ECB
ECB
BCE
ECB
ECB
+
A
K
HPRE701
REC/PB/ERASE
HEAD
–1
–2
–3
–4
–5
–6
SW701
(REC/PB)
REC
PB
CASSETTE BOARD
BMAIN BOARD
CN201
A
B
C
1 2 3 4 5
•Semiconductor
Location
Ref. No. Location
D701 B-4
D702 B-4
IC701 B-3
Q701 A-4
Q702 B-4
Q703 B-4
Q704 A-2
Q705 B-2
Q706 C-2
1
2
3
3
MAIN
BOARD
(2/2)
CN201
B
IC B/D
1
9
0
1.2
1.4
3.9
00
7.8
7.7
0
3.9
1.4
1.2
0
0 (0.7) 0
0 (0.7)
0
0
(3.5)
0.7 (0)
0.7
0
9.3 (0.8)
9.3 (0.8)
8.9 (0.3)
0.4 (0)
[21.4]
0 (0.7)[0]
R-CH
L-CH
ERASE
HRPE701
RECORDE/PLAYBACK
ERASE
CN701
4P
0.0015
0.0015
SW701 (4/6)
(REC/PB)
REC
R
PB
SW701 (2/6)
(REC/PB)
REC
r
PB
SW701 (3/6)
(REC/PB)
REC t PB
Q705
ISS SWITCHING
0.0027
0.022 0.022
+
50V 0.022
0.0068
Q706
REC BIAS OSC
SW701 (6/6)
(REC/PB)
REC T PB
MUTING
CONTROL
SWITCH
Q704
REC ON SWITCH
25V
+
1SS133T
-77
+
+
50V
5.6k
1.2k
0.1
SW701 (1/6)
(REC/PB)
REC
R
PB
0.1
50V
+
+
0.022
10V +
+
0.1
50V
+
+
0.1 5.6k
1.2k
IN1 NF1 PC1 OUT1 GND
IN2 NF2 PC2 OUT2 VCC
ALC
IN1
ALC
CONST
ALC
IN2 RF
SW701 (5/6)
(REC/PB)
REC
r
PB
50V
+
IC701
ALC, REC/PB AMP
Q701, 702
MUTING
50V
50V
+
+
CASSETTE BOARD
0.0018
0.0018
330
2SD1616-L
50V
100k
1N4148TP
4.7k
(Page 16) (Page 15)

HCD-E301
1818
DISPLAY BOARD
1 36
13
+
MEGA BASS
MUSIC MENU
SW614
SW631
(MONO STEREO)
ST t MONO
ISS
+–VOLUME
2 t 1
Z PUSH
OPEN/CLOSE
SW600
A
A
A
A
K
K
A
TUNER
TAPE
REPEAT
SW613
K
K
K
KA
KA
KA
KA
+
SW622 SW621
K
K
A
A
A
+–TUNING
M > m .
+–
x
PRESET SHUFFLE
SW608
u
SW610
TUNER MEM
ENTER PGM
+
REMAIN
CD
K
K
A
K
K
A
SW601 –615
MAIN BOARD
CN101
+
+
A
ECB
ECB
I/1
13
TIMERD619
20
180
40 41
21
61
60
IC601
D621
LIQUID CRYSTAL DISPLAY
IC603
REM601
(INCLUDED IN DISPLAY BOARD)
D11 –19
(LCD BACK LIGHT)
D19 D18
R421 R420
D17 D16 D15 D14 D12
D13
D11
R419
12
98
116
IC602
C
MAIN BOARD
CN302
D
MAIN BOARD
CN204
A
21
A
B
C
D
E
F
1 2 3 4 5 6 7
6-7. PRINTED WIRING BOARD –DISPLAY Board –•See page 13 for Circuit Boards Location.
•Semiconductor
Location
Ref. No. Location
D11 F-4
D12 F-4
D13 F-4
D14 F-4
D15 F-3
D16 F-3
D17 F-3
D18 F-2
D19 F-2
D601 C-6
D602 D-5
D604 C-3
D607 B-3
D608 B-3
D609 D-2
D610 D-2
D611 D-2
D612 C-3
D613 D-3
D614 D-3
D615 D-3
D616 D-6
D617 E-2
D619 B-6
D647 C-6
IC601 B-4
IC602 D-2
IC603 A-3
Q601 B-6
Q602 B-6
REM601 B-6
(Page 16)
(Page 16)
(Page 16)

HCD-E301
1919
MAIN BOARD (2/2)
CN204
D
MAIN BOARD (2/2)
CN302
C
MAIN
BOARD
(1/2)
CN101
A
1
2.4
2.4
2.4
2.4
2.4
2.4
4.7
4.7
3.2
1.6
0 (4.7)[4.7]
0 (4)[0]
1.4 (0)[1.4]
4.6
4.6
4.5
0
5.3
5.2
4.7
5.3
5.2
5.3 5.2
0 {3.5}
0
0
0
4.7
MEGA BASS
ON : 0.1
OFF : 4.7
0
4.7
4.7
2.4 2.9
5.2
4.6
4.3
5.2
5.2
5.2
5.2
5.6
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
5.2
5.2
4.7 5.2
0.6
0.6
5.3
5.3
5.3
5.3
4.7
5.3
5.3 5.3
5.3
5.3
5.3
5.3
5.6
5.6
SEL2215S-CD
D619
TIMER
LIQUID CRYSTAL DISPLAY
µPD753016AGC-F31-3B9
IC601
SYSTEM CONTROLLER,
LIQUID CRYSTAL DISPLAY DRIVER
COM0
S31 S30 S29 S28 S27 S26 S25 S24 S23 S22 S21 S20 S19 S18 S17 S16 S15 S14 S13 S12
COM1
COM2
COM3
BIAS
VLC0
VLC1
VLC2
TUNER
TAPE
CD
TIMER STATUS
VSS
CD RESET
SURROUND
PLL CL
PLL DI
TUNER SD
CLOCK
DATA
S11
S10
S9
S8
S7
S6
S5
S4
S3
S2
S1
S0
CPU RESET
KEY R3
KEY R2
KEY R1
KEY R0
12/24H SELECT
NC
CD
DATA
PLLDO SELECT
X2 X1 IC XT2 XT1 VDD DPSW2/SLEND BASS BOOST PSW RDS DATA SHRST CE PLLCE MUTE SYNCRO REMOTE RDS CLOCK CD CLOCK
STEREO
1.8k
1.8k
BUFFER
++
0.1
0.1
+
10V
Q602
POWER
ON/OFF
SWITCH
REM601
REMOTE
CONTROL
RECEIVER
REM601
RPM6938
10V
+
0.1
IC602
KEY CONTROL
L934SGC/B
D11-19
(LCD BACK LIGHT)
SW601 SW612 SW613 SW611 SW608
SW610
SW622
SW621
SW605 SW606 SW602
SW604
SW607
MEGA
BASS
SW615
I /1 TAPE TUNER REMAIN
CD x
+
G
OI
16V
0.022
u
REPEAT
SW603
SHUFFLE
MUSIC
MENU
SW614
TUNER MEM
ENTER PGM
TUNING +
M >
SW609
TUNING –
. m
SW605 SW606
–+
PRESET
SW621 SW622
–+
VOLUME
IC603
RESET SIGNAL
GENERATOR
IC603
P5290
L934SGC/B
L934SGC/B
L934SGC/B
L934SGC/B L934SGC/B
L934SGC/B
L934SGC/B L934SGC/B
1N4148TP
1N4148TP
1N4148TP
1N4148TP
1N4148TP
1N4148TP
1N4148TP
ZPUSH
OPEN/CLOSE
SW600
DISPLAY BOARD
D604
1N4148AP
D616
1N4148TP
1N4148TP
1N4148TP
1N4148TP
1N4148TP
1N4148TP
0.1
0.1
0.1
(MONO STEREO)
ST t MONO
ISS
2 t 1
0.1
10
16V 1000
6.3V
1N4148TP
180
180
180
1
9
1
9
1
8
SW631
TC4094BF
6-8. SCHEMATIC DIAGRAM –DISPLAY Board –•See page 21 forWaveform.
•Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : TUNER (FM/AM)
( ) : CD PLAY
[ ] : TAPE PLAY
{} : RECORD
(Page 14)
(Page 15) (Page 15)

HCD-E301
2020
6-9. SCHEMATIC DIAGRAM –POWER Board –
•Voltages are dc with respect to ground under no-signal
conditions.
no mark : TUNER (FM/AM)
6.2 6.7
7.9
0.6
00.5
1.1
1.1
0.7
1.1
MAIN BOARD
(2/2)
CN304
E
CN402
6P
B GND +
C404 0.022
C402 0.022
+
C408 0.022
C406 0.022
TR401
POWER
TRANSFORMER
MTZJ-6.8B
++
+
Q404
+6V REGULATOR
+
Q401–403
POWER ON/OFF
RELAY DRIVE
TR402
POWER
TRANSFORMER
2.2k
C421 0.001 250V
RL401
AC IN
POWER BOARD
2SD1616-L
2SD1616-L
2.2k
(Page 15)
The components identified by mark 0or dotted
line with mark 0are critical for safety.
Replaceonlywithpart number specified.