Sony HCD-EP414 User manual

HCD-EP414
AEP Model
E Model
Australian Model
SERVICE MANUAL
MICRO HI-FI COMPONENT SYSTEM
Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation
9-877-473-01
2003F1678-1
© 2003.06
HCD-EP414 is the Amplifier, CD player, Tape
Deck and Tuner section in CMT-EP414.
SPECIFICATIONS
Ver 1.0 2003. 06
CD player section
System Compact disc and digital
audio system
LaserSemiconductor laser
(λ=780 nm)
Emission duration:
continuous
Frequency response 2 Hz – 20 kHz (±0.5 dB)
Tape deck section
Recording system 4-track 2-channel stereo
Frequency response 50 – 13,000 Hz (±3 dB),
using Sony TYPE I
cassettes
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range 87.5 – 108.0 MHz (50-kHz
step)
Antenna FM lead antenna
Antenna terminals 75 ohms balanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range
European model: 531 – 1,602 kHz
(with the tuning interval
set at 9 kHz)
Other models: (with the tuning interval
set at 10 kHz)
531 – 1,602 kHz
(with the tuning interval
set at 9 kHz)
Antenna AM loop antenna, external
antenna terminal
Intermediate frequency 450 kHz
Amplifier section
European model:
DIN power output (rated): 11 + 11 W
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
15 + 15 W
(6 ohms at 1 kHz, 10%
THD)
Music power output (reference):
25 + 25 W
Other models:
The following measured at AC 230 V or AC 120 V, 50/
60 Hz
DIN power output (rated): 11 + 11 W
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
15 + 15 W
(6 ohms at 1 kHz, 10%
THD)
Inputs
MD IN (phono jacks):
Sensitivity 800 mV,
impedance 47 kilohms
Outputs
PHONES (stereo minijack):
Accepts headphones with
an impedance of 8 ohms or
more
SPEAKER: Accepts impedance of 6 to
16 ohms.
— Continued on next page —
CD
Section
TAPE
Section
Model Name Using Similar Mechanism HCD-EP515
Base Unit Name BU-K7BD44B
Optical Pick-up Name KSM-213EDP
Model Name Using Similar Mechanism HCD-EP515
Tape Transport Mechanism Type CMAL1Z240A
jomi

2
HCD-EP414
1. SERVICING NOTES ······················································· 3
2. GENERAL ·········································································· 5
3. DISASSEMBLY
3-1. Rear Cabinet ··································································· 8
3-2. CD Cabinet Section, Front Panel Section ······················· 8
3-3. Base Unit (BU-K7BD44B) ············································· 9
3-4. CONTROL Board, BACK LIGHT Board ······················ 9
3-5. Tape Mechanism Deck (CMAL1Z240A) ····················· 10
3-6. Cassette Door Assy ······················································· 10
3-7. POWER Board, MAIN Board ······································ 11
4. MECHANICAL ADJUSTMENTS ····························· 12
5. ELECTRICAL ADJUSTMENTS ······························· 13
6. DIAGRAMS ······································································ 15
6-1. Block Diagrams – CD Section – ·································· 17
6-2. Block Diagrams – Main Section – ······························· 18
6-3. Printed Wiring Boards – CD Section – ························ 19
6-4. Schematic Diagrams – CD Section – ··························· 20
6-5. Printed Wiring Borads – Main Section – ····················· 21
6-6. Schematic Diagrams – Main Section – ························ 22
6-7. Printed Wiring Boards – Control Section – ················· 23
6-8. Schematic Diagrams – Control Section – ···················· 24
6-9. Printed Wiring Boards – Power Section – ··················· 25
6-10. Schematic Diagrams – Power Section – ···················· 25
6-11. IC Pin Function Description ······································· 28
7. EXPLODED VIEWS
7-1. Cabinet Section ····························································· 30
7-2. Front Panel Section ······················································· 31
7-3. CD Cabinet Section ······················································ 32
7-4. Base Unit Section (BU-K7BD44B) ······························ 33
8. ELECTRICAL PARTS LIST ······································· 34
TABLE OF CONTENTS
General
Power requirements
European model: 230 V AC, 50/60 Hz
Australian model:
Mexican model:
230 - 240V AC, 50/60Hz
120 V AC, 60Hz
110 - 120V or 220 - 240V AC, 50/60HzOther models:
Power consumption
European model: 50 watts
0.3 watts (in the standby
mode)
Other models: 50 watts
Dimensions (w/h/d) Approx. 163 × 233 × 237
mm
Mass Approx. 3.6 kg
Design and specifications are subject to change
without notice.
jomi

3
HCD-EP414
SECTION 1
SERVICING NOTES
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 exterior.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
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 objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveforms is output three times.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
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 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-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINEWITH
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
PUBLISHED BY SONY.
jomi

4
HCD-EP414
Service Position of the CD Mechanism Deck
Service Position of the Tape Cassette Mechanism Deck
CD BOARD
POEWER BOARD
MAIN BOAR
D
FRONT PANEL
MAIN BOAR
D
POWER BOARD
jomi

5
HCD-EP414
SECTION 2
GENERAL This section is extracted
from instruction manual.
Main unit
BASS/TREBLE 5(13)
Cassette compartment qs
CD SYNC qd (12)
DIRECTION qg (11, 12, 15)
DISPLAY ws (9, 10, 16)
Display window 2
DSG 4(13)
MD 6(17)
PHONES jack qh
PLAY MODE qg (6, 7)
PRESET +/– 8(9)
Remote sensor 1
TUNER BAND w; (8, 9)
TUNING +/– 0(8, 9)
VOLUME 9(14, 15)
?/1 (power) ql (5, 9, 14, 15)
m/M (fast forward/rewind)
0(6, 11)
./> (go back/go forward)
8(5, 6, 7, 12, 13, 14, 15)
x(stop) qj (6, 7, 11, 12, 19)
X(pause) qk (6, 11)
zREC PAUSE/START qf (12,
15)
CD N(play) wa (6, 7)
TAPE nN (play) 7(11, 12,
15)
Z PUSH OPEN/CLOSE (CD
open/close) 3(6)
Z PUSH OPEN/CLOSE (tape
open/close) qa (11)
ALPHABETICAL ORDER
A – M P – Z
BUTTON DESCRIPTIONS
12 3
4
5
6
7
8
9
q;
qa
qs
qdqf
qg
qh
qj
qk
ql
w;
wa
ws
jomi

6
HCD-EP414
Remote control
BASS +/– 0(13)
CLEAR 8(8, 9)
CLOCK/TIMER SELECT w;
(14, 15)
CLOCK/TIMER SET wa (5, 14,
15)
DISPLAY 2(9, 10, 16)
DSG qa (13)
MD qk (17)
PLAY MODE/DIRECTION qd
(6, 7, 11, 12, 15)
PRESET +/– 5(9)
REPEAT/FM MODE qf (7, 9)
SLEEP ql (13)
TREBLE +/– 9(13)
TUNER BAND qh (8, 9)
TUNER MEMORY qs (8)
TUNING +/– 6(8, 9)
VOL +/– 7(14, 15)
?/1 (power) 1(5, 9, 14, 15)
m/M (fast forward/rewind)
6(6, 11)
./> (go back/go forward)
5(5, 6, 7, 12, 14, 15)
x(stop) 4(6, 7, 11, 12, 19)
X(pause) 3(6, 11)
CD N(play) qj (6, 7)
TAPE nN (play) qg (11, 12, 15)
ALPHABETICAL ORDER
A – M P – Z
BUTTON DESCRIPTIONS
1
wa
w;
ql
qk
qj
qh
qg
qf
qd
qs
qa
2
3
4
5
6
7
8
9
0
1
Press ?/1to turn on the system.
2
Press CLOCK/TIMER SET.
3
Press ./
./
>repeatedly to set the
hour.
4
Press CLOCK/TIMER SET.
5
Press ./
./
>repeatedly to set the
minute.
6
Press CLOCK/TIMER SET.
The clock starts working.
To adjust the clock
1Press CLOCK/TIMER SET.
2Press ./> to select “CLOCK”, then
press CLOCK/TIMER SET.
3Do the same procedures as step 3 to 6
above.
Setting the clock
jomi

7
HCD-EP414
SECTION 3
DISASSEMBLY
• This set can be disassembled in the order shown below.
REAR CABINET
BASE UNIT
(BU-K7BD44B)
CONTROL BOARD,
BACK LIGHT BOARD
POWER BOARD , MAIN BOARD
TAPE MECHANISM DECK
(CMAL1Z240A)
CASSETTE DOOR ASSY
SET
CD CABINET SECTION,
FRONT PANEL SECTION
jomi

8
HCD-EP414
3-2. CD Cabinet Section, Front Panel Section
8 connector
(CN301)
q; screw
(+BVTP 3 × 10)
qa two screws
(+BVTP 3 × 10
)
1 connector
(S800)
9 connector
(CN307)
qf front panel section
5 CD cabinet section
4 claw
3 claw
qs claw
qd claw
2 w ire (flat type)
21p (CN101)
6 w ire (flat type)
20p (CN303)
7 w ire (flat type)
15p (CN302)
3-1. Rear Cabinet
1 two screws
(+BVTP 3
× 10)
3 two screws
(+BVTP 3
× 10)
4 two screws
(+BVTP 3
× 10
)
2 four screws
(+BVTP 3
× 10)
5 four screws
(+K 3
× 5)
6 four screws
(+K 3
× 5)
7 rear cabinet
Note: Follow the disassembly procedure in the numerical order given.
jomi

9
HCD-EP414
3-3. Base Unit (BU-K7BD44B)
3-4. CONTROL Board, BACK LIGHT Board
1 two screws
(+PWH 2.6
× 10)
4 two vibration proof rubbers (GRN)
5 base unit
(BU-K7BD44B)
3 two vibration proof rubbers (PNK
)
2 two screws
(+PWH 2.6 × 10)
1 knob volume
4 CONTROL board
7 BACK LIGHT board
2 four screws
(+BVTP 3
× 10)
3 five screws
(+BVTP 3
× 10
)
5 Remove two solderings.
6 two claws
jomi

10
HCD-EP414
3-6. Cassette Door Assy
1 Open the cassette door assy.
3 cassette door assy
claw
2
3-5.Tape Mechanism Deck (CMAL1Z240A)
1 w ire (flat type) 8p
2 three screws
(+BVTP 3
× 10
)
3 tape mechanism deck
(CMAL1Z240A)
jomi

11
HCD-EP414
3-7. POWER Board, MAIN Board
1 connector
(AC IN)
2 connector
(CN901)
5 two screws
(+BVTP 3
× 10)
3 four screws
(+BVTP 4
× 12)
6 MAIN board
4 POWER board
jomi

12
HCD-EP414
3.04 – 6.96 mN • m
(31 to 71 g • cm)
(0.43 – 0.98 oz • inch)
0.20 – 0.58 mN • m
(2 to 6 g • cm)
(0.02 – 0.08 oz • inch)
3.04 – 6.96 mN • m
(31 to 71 g • cm)
(0.43 – 0.98 oz • inch)
0.20 – 0.58 mN • m
(2 to 6 g • cm)
(0.02 – 0.08 oz • inch)
6.97 – 14.02 mN • m
(71 to 143 g • cm)
(0.98 – 1.99 oz • inch)
9.8 mN • m or more
(100 g • cm or more)
(1.4 oz • inch or more)
9.8 mN • m or more
(100 g • cm or more)
(1.4 oz • inch or more)
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
CQ-403R
Precaution
1. Clean the following parts with a denatured alcohol-moistened
swab:
record/playback heads pinch rollers
erase head rubber belts
capstan idlers
2. Demagnetize the record/playback head with a head demag-
netizer.
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
SECTION 4
MECHANICAL ADJUSTMENTS
Mode
FWD
FWD
back tension
REV
REV
back tension
FF/REW
FWD tension
REV tension
Torque meter Meter reading
jomi

13
HCD-EP414
RFDC signal waveform
Checking Location: CD board (Conductor side)
RFAC Level Check
Connection:
Procedure:
1. Connect an oscilloscope to test point TP (RFAC) and TP (VC)
on the CD board.
2. Turn the power on.
3. Put the disc (YEDS-18) in to playback the number five track.
4. Confirm that oscilloscope waveform is clear and check RFAC
signal level is correct or not.
Note: A clear RFAC signal waveform means that the shape “◊” can be
clearly distinguished at the center of the waveform.
RFAC signal waveform
Checking Location: CD board (Conductor side) (See page 14)
CD SECTION
Note:
1. CD Block is basically designed to operate without adjustment. There-
fore, check each item in order given.
2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10MΩimpedance.
4. Clean the object lens by an applicator with neutral detergent when the
signal level is low than specified value with the following checks.
S-curve Check
Connection:
Procedure:
1. Connect an oscilloscope to test point TP (FE) and TP (DVC)
on the CD board.
2. Turn the power on.
3. Put the disc (YEDS-18) in and turned power switch on again
and actuate the focus search. (actuate the focus search when
disc table is moving in and out)
4. Check the oscilloscope waveform (S-curve) is symmetrical
between A and B. And confirm peak to peak level within 2 ±1
Vp-p.
S-curve waveform
Note: •Try to measure several times to make sure than the ratio of A : B
or B : A is more than 10 : 7.
•Take sweep time as long as possible and light up the
brightness to obtain best waveform.
Checking Location: CD board (Conductor side) (See page 14)
RFDC Level Check
Connection:
Procedure:
1. Connect an oscilloscope to test point TP (RFDC) and TP (DVC)
on the CD board.
2. Turn the power on.
3. Put the disc (YEDS-18) in to playback the number five track.
4. Confirm that oscilloscope waveform is clear and check RFDC
signal level is correct or not.
Note: A clear RFDC signal waveform means that the shape “◊” can be
clearly distinguished at the center of the waveform.
+
–
CD board
TP (FE)
TP (DVC)
oscilloscope
A
B
symmetry
within 2
± 1 Vp-p
+
–
CD board
TP (RFDC)
TP (DVC)
oscilloscope
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
level: 1.15
± 0.35 Vp-p
+
–
CD board
TP (RFAC)
TP (VC)
oscilloscope
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
level: 1.35
± 0.4 Vp-p
SECTION 5
ELECTRICAL ADJUSTMENTS
jomi

14
HCD-EP414
Checking Location:
– CD BOARD (Conductor Side) –
TP (VC)
TP (FE)
TP (TE) TP
(RFDC)
TP
(DVC)
TP
(RFAC)
IC103
IC101
jomi

15
HCD-EP414
SECTION 6
DIAGRAMS
• Circuit Boards Location
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
For schematic diagrams.
Note:
•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.
•C: panel designation.
For printed wiring boards.
Note:
•X: parts extracted from the component side.
•Y: parts extracted from the conductor side.
•f: internal component.
•: Pattern from the side which enables seeing.
•Indication of transistor
•A: B+ Line.
•B: B– Line.
•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.
•Abbreviation
AUS:Australian model
MX : Mexican model
•Signal path.
F: TUNER
J: CD
d: AUX
E: PB (TAPE)
a: REC (TAPE)
CD board
MAIN board
REGULATOR board
BACK LIGHT board
POWER board
CONTROL board
HEADPHONE board
Note:
The components identified by
mark 0or dotted line with mark
0are critical for safety.
Replace only with part number
specified.
C
B
These are omitted.
E
Q
jomi

16
HCD-EP414
•Waveforms
– CD Board –
1.1Vp-p
1IC103 qg (RFAC)
(CD Play Mode)
2IC101 el (FE)
(CD Play Mode)
200mV/DIV, 1 µ s /DIV
50mV/DIV, 200 µ s /DIV
100mV/DIV, 200 µ s /DIV
1V/DIV, 20ns /DIV
200mVp-p
250mVp-p
3IC101 ra (TE)
(CD Play Mode)
4IC101 yj (XTAO)
5.4Vp-p
59ns
6 IC801 qh (CF2)
1V/DIV, 40ns /DIV
1V/DIV,
10 µ s /DIV
5 IC801 qd (XT2)
4.8Vp-p
30.5
µ s
4.0Vp-p
116ns
7 Q307 collector (Rec mode)
5V/DIV, 4 µ s /DIV
11.3Vp-p
12.3
µ s
– CONTROL Board – – MAIN Board –
jomi

1717
HCD-EP414
6-1. Block Diagram – CD Section –
: CD
• Signal Path
SQSO SQCK
A/D
CONVERTER
CH1OUTF
CH1OUTR
6
7
8
9
16
18
11
10
12
2
1
51
49
48
43
24
41
40 39
64 15
28
29
30
31
32
33
24
25
23
5
6
2
3
17
18
15
16
E
B
C
D
A
CD +5V
F
DETECTOR
A
B
C
D
RF
SUMMING
AMP
FOCUS
ERROR AMP
TRACKING
ERROR AMP
RFAC
FE
IC103
RF AMP,
FOCUS/TRACKING ERROR AMP
TE
E
FF I-V AMP
E I-V AMP
Q101
AUTOMATIC
POWER
CONTROL
APC LD
AMP
LD
LD
PD
LASER DIODE
RFAC
ASYO
ASYI
ASYMMETRY
CORRECTION DIGITAL
PLL
IC101 (1/2)
DIGITAL SIGNAL PROCESSOR,
DIGITAL FILTER, D/A CONVERTER
DATA
XLAT
CLOK
14 56
MDP
26 7 8
XLON
3
XRST
DIGITAL
CLV
D/A
INTERFACE
SE
TE
FE
RFDC
FOCUS/TRACKING/SLED
SERVO DSP
FOCUS/TRACKING/SLED
PWM GENERATOR
SFDR
CH3FIN
CH4SIN
CH3RIN
CH3OUTF
CH3OUTR
CH2FIN
CH2RIN
CH1FIN
CH1RIN
20
MUTE
SRDR
TFDR
TRDR
FFDR
FRDR
S101
(LIMIT)
EMPH
WFCK GFS
MIRR/DFCT/
FOK
DETECTOR
SERVO AUTO
SEQUENCER SERVO
INTERFACE
CPU INTERFACE
18
63
62
61
19
SENS
20
32
33
31
36 27
SCOR
CD SQSO
CD SQCK
CD XLT
CD CLK
CD DATA
CD SENS
CD SCOR
1 2
37 35
SCLK
COUT
921
SSTP
27
FOK
22
23
MIRR
DFCT
TO SERVO INTERFACE
CH4OUTF
CH4OUTR
M101
(SPINDLE)
MOTOR
DRIVE
MOTOR
DRIVE
CH2OUTF
CH2OUTR
M
M
M103
(SLED)
IC102
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
IC101 (2/2)
DIGITAL SERVO
PROCESSOR
SW
PD
I-V AMP
12
11
13
14
54 56 53 55
FILTER
FILO
PCO
CLTV
FILI
EFM
DEMODULATOR
SERIAL
IN
INTERFACE
DIGITAL
FILTER,
NOISE SHAPER
PWM
&
INTEGRATOR BUFFER
CLOCK
GENERATOR TIMING
LOGIC
DIGITAL
OUT
INTERNAL BUS
16K
RAM
ERROR
CORRECTOR
SUBCODE
PROCESSOR
60
92 CD XRST
XTAI
X101
16.9344MHz
AIN1
AIN2
AOUT1
AOUT2
TO MIRR/DFCT/
FOK DETECTOR
PCMD
BCK
LRCK
C2PO
DOUT
66
XTAO 67
70
77
LOUT1
LOUT2 R-CH
72
75
71
76 A
MAIN SECTION
EQ
IN 15
3
4EQ
AC
SUM
17
FEI
RF DC
AMP 28
RFDCO
29
RFDCI
COIL
DRIVE
COIL
DRIVE
10
9
CD PWM2
CD PWM1
PWM3
PWM2
PWM3
PWM2
93 CD LDON
IC801 (1/2)
CD
L-CH
RFAC
VCA
+7V
+7V
+5V
SYSTEM CONTROLLER
+3.3V
REG
Q102
CD +5V
REG
Q317
OPTICAL PICK-UP
BLOCK
(KSM-213EDP)
jomi

1818
HCD-EP414
6-2. Block Diagrams – Main Section –
: TUNER
: CD
• Signal Path
: AUX
: PB (TAPE)
: REC (TAPE)
• R-CH is omitted due to same as L-CH.
BIAS
OSC
Q307
+10V
ERASE
HEAD
REC/PB
HEAD
TU DI
4
TU CLK
5
TU CE
6
SYSTEM CONTROLLER
IC801
TU DO
3
L
R
MD
J303
J301
PHONES
R CH
L
R
FUCTION
KEY
REMOTE
CONTROL
RECEIVER
IC802
S801-809
TUNER UNIT
L-CH
R-CH R-CH
D OUT
D IN
CLK
CE
TUNED
R-CH
TU TUNED
87
REC/PB
SWITCH
Q326-332
T301
BIAS OSC
Q308
TA REC/PB
30
TA BIAS
98
TA SW
24
XT1
12
XT2
13
X801
32.768kHz
CF1
15
CF2
16
X802
8.64MHz
99
AMP MUTE
29
RMC
FUCTION
KEY
S810-817
20
KEY1
VOL
ENCODER
RV801
22
VOL ENCODER
31
RESET
SWITCH
Q806
11
RESET RESET
IC803
13
23
I POWER DOWN
D907-910
RELAY
DRIVE
AC
IN
CD POWER
CONTROL
Q320
Q311 RY901
19
KEY0
34
CD ON
+5V
PB/REC EQ AMP
IC302
AUX L
19 18
OUT L
TU L
23
TAPE L
2
CD L
21
16
OUT R R-CH
13
CONT
28
REC OUT
TU MUTE
1
RDS DATA
7
TU STEREO
38
STEREO
MUTE
R DATA
R INT RDS CLK
26
R-CH
R-CH
L-CH
F DATA
91
TA PLAY SW
39
TA MOTOR
88
TA END SW
8
TA SOL
28
CD OPEN/CLOSE
94 CD OPEN
POWER
AMP
R CH
J302
SPEAKER
SEG1
SEG33
83
86
COM0
COM3
FLUORESCENT
DISPLAY
LCD801
POWER
CONTROL
D810
µCON +B
+5.6V (SUB)
D811
18
I POWER MONITOR
Q315
LINE
FILTER
LF901
+7V
REG
Q319
+7V
IC302
+5V
+5V
Q309
14
6 5
2
IC303
97
AMP STBY
12
D809
µCON +B
+10V
REG
IC305
13
D916-919
D911-914
+5V
REG
Q305
TU +5V +5V
REG
Q310
+10V
D319-321
POWER AMP
VCC
AC
DET
Q333
IC302
-5V -5V
REG
Q306
POWER
MONITER
Q338
+5.6V
REG
Q312-314
+10V
D317
95
POWER ON
+5.6V( SUB)
Q809
TAPE MECHANISM DECK
(CMAL1Z240A)
PLAY
T SOL
DRIVE
Q321,322
MOTOR
DRIVE
Q323,325
R REC
F REC
PACK
T END
M
DECK
MOTOR
45
53
56
79
.
40
ST/BY
96
BL ON
LED
DRIVE
Q805 D806
LED
DRIVE
Q808
D701-703
(BACK RIGHT)
R-CH
L OUT2
L OUT1
A
CD SECTION
S800
(OPEN)
(MAIN)
+5V +5V
REG
Q339 T902
POWER
(MAIN)
TRANSFORMER
T901
POWER
(SUB)
TRANSFORMER
jomi

1919
HCD-EP414
6-3. Printed Wiring Boards – CD Section –
Ref. No. Location
D101 F-5
IC101 E-4
IC102 C-5
IC103 D-2
Q101 C-2
Q102 G-5
• Semiconductor
Location
• See page 15 for Circuit Boards Location.
IC102
IC101
IC103
TP (VC)
TP (RFAC)
TP (DVC)
TO
CONTROL BOARD
CN803
(Page 23)
1-680-849-
M102
M101
12
A
B
C
D
E
F
G
345678
jomi

2020
HCD-EP414
6-4. Schematic Diagrams – CD Section – • See page 16 for Waveforms. • See page 26 for IC Block Diagrams.
M102
M101
KSM-213EDP
CN803
BOARD
CONTROL
0uH
0uH
24
JR101
jomi