Sony HCD-EP707 - Micro Hi-fi Component System User manual

SERVICE MANUAL
COMPACT DISC DECK RECEIVER
US Model
Canadian Model
AEP Model
UK Model
Australian Model
HCD-EP707
Ver 1.5 2003.08
HCD-EP707 is the amplifier, CD
player, tape deck and tuner section
in CMT-EP707.
SPECIFICATIONS
CD Model Name Using Similar Mechanism NEW
Section CD Mechanism Type CMCJ-0132
TAPE Model Name Using Similar Mechanism HCD-EP505
Section Tape Transport Mechanism Type CRL4349
9-874-043-06 Sony Corporation
2003H05-1 Home Audio Company
C2003.08 Published by Sony Engineering Corporation
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)
OPTICAL DIGITAL OUT
(Square optical connector jack, rear panel)
Wavelength 660 nm
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
Antenna terminal (Except for European model)
75 Ωcoaxial
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range
Pan-American model: 530 - 1 710 kHz
(with the interval set at
10 kHz)
531 - 1 710 kHz
(with the interval set at
9 kHz)
European model: 531 -1 602 kHz
(with the interval set at
9 kHz)
AUDIO POWER SPECIFICATIONS:
(U.S.A. model only)
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
with 4 Ωloads both channels driven, from 120
- 10,000 Hz; rates 15 W per channel minimum
RMS power, with no more than 10% total
harmonic distortion from 250 mW to rated
output.
Amplifier section
Canadian model:
Continuous RMS power output (reference)
15 + 15 W
(4 Ωat 1 kHz, 10% THD)
European model:
DIN power output (rated) 12 + 12 W
(4 Ωat 1 kHz, DIN)
Continuous RMS power output (reference)
15 + 15 W
(4 Ωat 1 kHz, 10% THD)
Music power output (reference)
38 + 38 W
Other model:
The following measured at AC 230 V or AC 120 V,
50/60 Hz
DIN power output (rated) 12 + 12 W
(4 Ωat 1 kHz, DIN)
Continuous RMS power output (reference)
15 + 15 W
(4 Ωat 1 kHz, 10% THD)
Inputs
MD IN (phono jacks): voltage 450 mV,
impedance 47 kilohms
Outputs
PHONES: Accepts headphones of
(stereo mini jack) 8 Ωor more
SPEAKER: Accepts impedance of 8 to
16 Ω
General
Power requirements
North American model : 120 V AC, 60 Hz
Other models: 230 V AC, 50/60 Hz
Power consumption
European model: 38 W
0.5 W (in the standby
mode)
Other models: 38 W
Dimensions (w/h/d):
Approx. 180 ×246 ×335 mm
Mass: Approx. 5.0 kg
Supplied accessories: AM loop antenna (1)
Remote Commander (1)
Batteries (2)
FM lead antenna (1)
(Except for European
model)
Design and specifications are subject to change
without notice.
Other models: 531 - 1 602 kHz
(with the interval set at
9 kHz)
530 - 1 710 kHz
(with the interval set at
10 kHz)
Antenna AM loop antenna
Intermediate frequency 450 kHz

2
HCD-EP707
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.
This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the bottom.
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.
Fig. A. Using an AC voltmeter to check AC leakage.
1.5 k Ω 0.15 µFAC
voltmete
r
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
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.
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing 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. Follow 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” indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are suit-
able. (See Fig. A)

3
HCD-EP707
TABLE OF CONTENTS
1. SERVICING NOTES ................................................ 4
2. GENERAL ................................................................... 5
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 6
3-2. Side (Panel) ..................................................................... 7
3-3. Top Cabinet Section ........................................................ 7
3-4. Tape Mechanism Deck (CRL4349) ................................ 8
3-5. Front Panel Section ......................................................... 8
3-6. MAIN Board ................................................................... 9
3-7. CD Mechanism Deck (CMCJ-0132) .............................. 9
3-8. REGULATOR Board ...................................................... 10
3-9. POWER AMP Board....................................................... 10
3-10. Cover ............................................................................... 11
3-11. Drawer ............................................................................. 12
3-12. Belt (Gray/Black) ............................................................ 13
3-13. Optical Block .................................................................. 13
4. ELECTRICAL ADJUSTMENTS......................... 14
5. DIAGRAMS
5-1. Block Diagram – TUNER Section – ............................. 16
5-2. Block Diagram – TAPE DECK Section – ..................... 17
5-3. Block Diagram – MAIN Section – ................................ 18
5-4. Block Diagram
– DISPLAY/POWER SUPPLY Section – ...................... 19
5-5. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 20
5-6. Printed Wiring Boards – MAIN Section – .................... 21
5-7. Schematic Diagram – MAIN Section (1/2) –................ 22
5-8. Schematic Diagram – MAIN Section (2/2) –................ 23
5-9. Printed Wiring Boards – POWER AMP Section – ...... 24
5-10. Schematic Diagram – POWER AMP Section – ............ 25
5-11. Printed Wiring Boards – DISPLAY Section – .............. 26
5-12. Schematic Diagram – DISPLAY Section – ................... 27
5-13. Printed Wiring Boards – REGULATOR Section – ....... 28
5-14. Schematic Diagram – REGULATOR Section – ........... 29
5-15. IC Pin Function Description ........................................... 31
6. EXPLODED VIEWS
6-1. Panel Section ................................................................... 33
6-2. Front Panel Section ......................................................... 34
6-3. Top Cabinet Section ........................................................ 35
6-4. Chassis Section ............................................................... 36
6-5. CD Section ...................................................................... 37
7. ELECTRICAL PARTS LIST ............................... 38
Ver 1.1

4
HCD-EP707
Ver 1.1
NOTE FOR TRANSPORTING A SET
After repair is completed, be sure to attach EP707 (SAFETY)
(STRIP) (Part No. 4-244-664-01) and EP707 (STUD) (Part No. 4-
244-665-01) on the set with following procedure before you trans-
port a set.
1Re-tie the strip on the disc tray as shown (see Fig. A).
2Press ?/1to close the disc tray.
The system turns off. Do not press DISC 1 - 3 or Zto close the disc
tray.
3Reinsert the tagged pin (see Fig. B).
A
B
EP707 (SAFETY) (STRIP)
(Part No. 4-244-664-01)
EP707 (STUD)
(Part No. 4-244-665-01)
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.
SECTION 1
SERVICING NOTES
•MODEL IDENTIFICATION
– Rear View –
Power Voltage
Indication
AC: 120 V 60 Hz 38 W
AC: 230 V -50/60 Hz 38 W
Model
US and Canadian
models
Other models
Power Voltage Indication

5
HCD-EP707
SECTION 2
GENERAL This section is extracted from
instruction manual.
LOCATION OF CONTROLS
– Front Panel –
Main unit
P – Z
PGM CLEAR 8
PHONES jack ql
PLAY MODE wa
PRESET +/– qd
Remote sensor wd
TAPE 2
TUNER 6
TUNER MEM q;
TUNING +/– qs
VOLUME control qh
ALPHABETICAL ORDER
A – M
Cassette compartment 5
CD 3
DISC 1/DISC 2/DISC 3 qf
Disc tray qg
DISC SKIP 3
DISPLAY ws
Display Window 4
ENTER 1
FM MODE/DIR wa
MD 7
MEGA BASS qk
MUSIC MENU qj
BUTTON DESCRIPTIONS
@/1 (power) w;
CD
.m(go back) qs
M>(go forward) qs
nN (play) 1
X(pause) q;
Z(eject) qf
x(stop) 8
TAPE
M> (fast forward) qs
X(pause) 0
nN (play) 1
z REC PAUSE/START qa
.m (rewind) qs
Z
PUSH OPEN/CLOSE 9
x(stop) 8
AM loop
antenna
Left speakerRight speaker
*Except for European model
FM antenna*
– Back Panel –
A – M
CD qa
CLOCK/TIMER ON/OFF 2
CLOCK/TIMER SET 3
DISC SKIP 7
DISPLAY 6
ENTER qg
FM MODE 8
MD 9
MEGA BASS qf
MUSIC MENU +/– qj
MUTING qh
P – Z
PGM CLEAR qs
PLAY MODE w;
PRESET/CLOCK/TIMER +/–
wd
REPEAT/DIR wa
SLEEP 1
TAPE ql
TUNER/BAND q;
TUNER MEMORY qk
TUNING +/– ws
VOL (volume) +/– qd
Remote control
@/1 (power) 4
m(rewind) M(fast forward)
ws
.(go back) >(go forward)
wd
X(pause) wf
nN (play) wg
x(stop) 5
ALPHABETICAL ORDER BUTTON DESCRIPTIONS

HCD-EP707
6
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY
3-2. SIDE (PANEL)
(Page 7)
3-7. CD MECHANISM DECK
(CMCJ-0132)
(Page 9)
3-9. POWER AMP BOARD
(Page 10)
3-3. TOP CABINET SECTION
(Page 7)
3-10.COVER
(Page 11)
3-13.OPTICAL BLOCK
(Page 13)
3-8. REGULATOR BOARD
(Page 10)
3-4. TAPE MECHANISM DECK
(CRL4349)
(Page 8)
3-11.DRAWER
(Page 12)
3-12.BELT (GRAY/BLACK)
(Page 13)
3-5. FRONT PANEL SECTION
(Page 8)
3-6. MAIN BOARD
(Page 9)
SET

HCD-EP707
7
3-3. TOP CABINET SECTION
Note: Follow the disassembly procedure in the numerical order given.
3-2. SIDE (PANEL)
1 three screws
(KTP3
× 8)
5 three screws
(KTP3
× 8)
2 three screws
(KTP3
× 8)
3 screw
(BVTP3
× 10)
6 three screws
(KTP3
× 8)
4 side (panel) (L)
8 side (panel) (R)
7 screw
(BVTP3
× 10)
2 two claws
3 claw
5 connector
4
1
connector
(CON209)
6 top cabinet section

HCD-EP707
8
3-4. TAPE MECHANISM DECK (CRL4349)
3-5. FRONT PANEL SECTION
2 tape mechanism dec
k
(CRL4349)
4 four screws
(BVTP3 × 10)
3 connector
(CON806)
9 front panel section
3 connector
(CON207)
3 connector
(CON208)
3 connector
(CON205)
1 Remove a solder.
3 connector
(CON203)
7 two screws
(BVTP3 × 12)
3 connector
(CON211)
2 connecto
r
2 connector
(CON810)
6 screws
(BVTP3
× 10)
8 two claws
6 screws
(BVTP3 × 10)
4 two rubbers (foot)
5 two screws
(KTP3 × 8)

HCD-EP707
9
3-6. MAIN BOARD
3-7. CD MECHANISM DECK (CMCJ-0132)
6 two screws
(BVTT2
× 8)
7 two screws
(BVTP3
× 10
)
4 screw
(BTP2.6
× 8)
AEP, UK
5 antenna jack cover
2 connector
(CON215)
2 connector
(CON214)
2 connector
(CON211)
2 connector
(CON203)
2 connector
(CON205)
2 connector
(CON216)
2 connector
(CON207)
3 two screws
(BVTP3
× 12)
2 connector
(CON210)
2 connector
(CON208)
8 main board
2 connector
1 Remove a solder.
1 connector
2 connector
4 CD mechanism deck
(CMCJ-0132)
2 connector
3 two screws
(BVTP3 × 10)
3 two screws
(BVTP3 × 10)

HCD-EP707
10
3-8. REGULATOR BOARD
3 three claws
6 regulator board
2 two screws
(BVTP3
× 8)
1 connector
(CON810)
45
Remove twelve solders.
regulator board
(bottom side view)
3-9. POWER AMP BOARD
7 power amp board
3 rear (cover)
6 four screws
(BVTP3
× 8)
2 screw
(KTP3
× 8
)
1 four screws
(BVTP3
× 10)
4 connector
(CON800)
4 connector
(CON214)
5 connector
(CON808)
5 connector
(CON801)

HCD-EP707
11
3-10. COVER
2 cover
1 two screws
1 two screw
s

HCD-EP707
12
3-11. DRAWER
lever (slider-2)
1 Slide the lever (slider-2)
in the direction of arrow A ,
at the full.
2 Slide the lever (slider-2)
in the direction of arrow B ,
at the full.
3
front
-bottom view-
rear
lever (slider-2) lever (slider-2)
AB
6 drawer
4 Push the drawer
in the dirrection of arrow
C ,
and remove two claws.
5 Push the drawer
in the dirrection of arrow
D ,
and remove two claws.
C
D

HCD-EP707
13
3-12. BELT (GRAY/BLACK)
1 belt (gray)
2 belt (black
)
7 flexible cable
8 two cushions
qa optical block
9 two cushions
0 cushion
1 two screws
2 arm
3 carriage
6
5
four washers
4 four screws
3-13. OPTICAL BLOCK

HCD-EP707
14
TUNER SECTION 0 dB=1 µV
[AM]
Setting:
Function: TUNER
TUNER/BAND switch: AM
[FM]
Setting:
Function: TUNER
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
SPEAKER JACK board
SPEAKER terminal (SP801
)
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 µF
MAIN board
TP (FM ANT)
MAIN board
TP (GND) SPEAKER JACK board
SPEAKER terminal (SP801)
digital voltmeter
100 kΩ
MAIN board
TP (VT)
TP (GND)
SECTION 4
ELECTRICAL ADJUSTMENTS
Tape Speed Adjustment
Setting:
Function: TAPE
Procedure:
1. Playback WS-48B (tape center) in the FWD state.
2. Adjsut the volume in CAPSTAN/REEL motor so that the fre-
quency counter reading becomes 3,000 Hz.
Specified Value: 2,910 to 3,090 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-48B 3 kHz, 0 dB Tape Speed Adjustment
frequency counter
test tape
WS-48B
(3 kHz, 0 dB)
set
SPEAKER JACK board
SPEAKER terminal (SP801)
–
+
47 kΩ
CAPSTAN/REEL
motor
Tape Speed
Adjustment
Sample Value of Wow and Flutter: 0.3% or less W. RMS (JIS)
(WS-48B)

1515
HCD-EP707
( ): AEP, UK models
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
IFT205 450 kHz
AM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
IFT201 530 kHz 1.3 ±0.1 V
(531 kHz)
Confirmation 1,710 kHz 7.8 ±0.5 V
(1,602 kHz) (7.1 ±0.5 V)
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
IFT202 603 kHz
VC205 1,404 kHz
FM FREQUENCY COVERAGE CONFIRMATION
Adjustment Part Frequency Display Reading on Digital Voltmeter
L204 87.5 MHz 2.3 to 2.5 V (1.4 to 1.6V)
Confirmation 108 MHz 6.3 to 7.3 V (7.3 to 8.5 V)
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L203 90.1 MHz
VC202 106.1 MHz
TP
(FM ANT)
TP
(GND)
TP
(VT)
– MAIN BOARD (Conductor Side) –
– MAIN BOARD (Component Side) –
IFT205 AM IF Adjustment
L204 FM Frequency Coverage Adjustment
IFT201 AM Frequency Coverage Adjustment
L203
}
FM Tracking Adjustment
VC202
IFT202
}
AM Tracking Adjustment
VC205
Adjustment Location and Connecting Points

1616
HCD-EP707 SECTION 5
DIAGRAMS
5-1. BLOCK DIAGRAM – TUNER Section –
• SIGNAL PATH
: FM
: AM
• R-ch is omitted due
to same as L-ch.
CON202
CON201
24 510
22
16
FMRF IN FMIF
FMRF OUT
13
FM DET
19
DET OUT
1AMRF IN
3AM
OSC
8
AMOSC
BUFFER
20
FMOSC
15
AM/FM SW
7
AM/FMIF
BUFFER
FM
MIX L OUT
R OUT 17
3
CE
DO 6
4
DI
20
XOUT
1
XIN
CL 5
CF201
911 AMIF
7BO1
12 IFIN
11 IO1
20 AOUT
19 AIN
18 PD
FMIN
AM
MIX
CF202
CF203
B
(Page 18)
A
(Page 18)
FM ANT
75Ω
COAXIAL
AM ANT
BPF
BPF201
IFT202
AM RF
IFT201
AM OSC
Q201
VC205
AM FREQUENCY
COVERAGE
IFT201
FM FREQUENCY
COVERAGE
L204
AM TRACKING
IFT202, VC205
FM TRACKING
L203, VC202
VC202
L203
FM RF
FM/AM IF AMP,
MIX, DET, MPX, OSC
IC202
AM IF
IFT205
TU-L
R-CH TU-R
DA IN
CLOCK
PLL CE
DA OUT
AGC 12
16
AMIN
15
BUFFER
Q202
STATION
STEREO
14
MONO/ST 8BO2
FM/AM
SELECT SWITCH
Q204
FM OSC BUFFER
Q252
L. P. F
CF204
7.2MHz
FM/AM PLL
IC201
RCLK
RDATA
RCLK
RDAT
MUX
BUFFER
Q208 416
2
CF205
4.332MHz
RDS DECODER
IC203
14
13
XI
XO
H
(Page 19)
(AEP, UK)

1717
HCD-EP707
5-2. BLOCK DIAGRAM – TAPE DECK Section –
: RECORD
: TAPE PLAY
ALC,
REC/PB AMP
IC208
R-CH
L-CH
HPRE201 (1/2)
(RECORD/PLAYBACK)
R-CH R-CH 5
1
23
(PROTECT (FWD) DETECT)
(PROTECT (REV) DETECT)
(TAPE DETECT)
(CrO
2 DETECT)
REC
MUTING
Q243
PB
MUTING
Q247
REC/PB
SWITCH
Q246
AMP GAIN
CONTROL
Q242
ALC
SWITCH
Q239
ALC
BIAS
TRAP
CAPSTAN/REEL
MOTOR DRIVE
Q217, 218
REC IN
44
AMS
28
REC SW(FWD)
61
REC SW(RVS)
HALF-SW
59
MODE-SW
57
R-CH
BIAS OSC
T201
12V
REC BIAS
SWITCH
Q226, 227
REC/PB
SWITCH
Q223
REC/PB
SWITCH
Q229, 239
REC/PB
SWITCH
Q220, 221
M
(CAPSTAN/REEL)
TRIGGER
PLUNGER DRIVE
Q215, 216
(TRIGGER PLUNGER)
SYSTEM CONTROLLER
IC101 (1/3)
R-CH
R-CH
R-CH
R-CH
R-CH
(HEAD POSITION DETECT)
R-CH
TL-CH
TR-CH
RL-CH
RR-CH
C(Page 18)
D(Page 18)
TROUT
6V.N 1
AMS
IC209
HPRE201 (2/2)
(ERASE)
BUFFER
Q219
TAPE PLAY/REC DETECT
SENSOR
MUTING
Q241
TAPE TYPE
SELECT SWITCH
Q240
62
BIAS OSC
Q228
OUT1
ALC
IN1
NF1
• SIGNAL PATH
• R-ch is omitted due to same as L-ch.
SOL, REC_EN,
MOTOR_ON
E(Page 18)
REC_EN
SOL
MOTOR_ON
Q225 Q222Q224
AMP GAIN
CONTROL
Q256
D210
R-CH

1818
HCD-EP707
5-3. BLOCK DIAGRAM – MAIN Section –
: RECORD
: AUX IN
: TAPE PLAY
: CD PLAY
: CD PLAY (DIGITAL OUT)
: TUNER
EEPROM DATA
SYSTEM CONTROLLER
IC101 (2/3)
EEPROM
IC102
CD DATA
CD CLK
CD RESET
LIN1
LIN2
D
(Page 17) TL-CH
TR-CH
DATA
X2
X1
X102
4.19MHz
11
23
EEPROM CLK 22
12
MUTE 3
STROBE 8
26
CLK
27
13
41
36
9
CAR M–
CAR M+
21
20
DATA OUT
CLK
18
17
DATA IN
19
PLL-CE
4
SDA
5
SCL
6
16
15
LIN3
LIN4
14
A
(Page 16)
L
R
24
OUT_L
18
LOUT
17
LIN
23
OUT_R R-CH
6
ROUT R-CH
R-CH
R-CH
CD-L-IN
CD-R-IN
CD-DIGITAL-
OUT
CD BLOCK
INPUT SELECT SWITCH,
ELECTRICAL VOLUME
IC207
R-CH
R-CHR-CH
PHONES
SP801
CD DO
CD CLK
CD \RESET
+
+
–
–
+9V
FUNCTION SELECT
IC204
CLOCK
3
SERIAL
2
STROBE
1
R-CH
B
(Page 16)
TU-R
TU-L
DA IN
CLOCK
DA OUT
STEREO
53
STEREO
TUNER STATION
27
STATION
PLL CE
R-CH
D211
D205
JK201
CAR EX
CAR HM
5
47
48
49
CHANGER
MECHANISM BLOCK
EX
HOME
CDSW5
4
OP/CLS
SLD FW
50
51
52
CDSW4
OPEN/CLOSE
FWD
SLD REW
54
RVS
HEADPHONE
AMP
IC210
MUTING
Q234
MUTING
Q702, 703 SPEAKER
IMPEDANCE
USE 4Ω
POWER AMP
U1
• R-ch is omitted due to same as L-ch.
• SIGNAL PATH
CARRIAGE MOTOR DRIVE
IC205
IN1
IN2
OUT1
OUT2
9
1
7
3
MOTOR
DRIVE
R-CH
CON204
L
R
MD IN
DIGITAL OUT
OPTICAL
OPTICAL
TRANSCEIVER
CON219
CAR M–
CAR M+
DAW M–
DAW M+
7
24
DRAWER MOTOR DRIVE
IC206
IN1
IN2
OUT1
OUT2
9
1
7
3
MOTOR
DRIVE
DAW M–
DAW M+
R-CH
RL-CH
RR-CH
CD-EN, TU-EN,
MUTING
POWER ON
C(Page 17)
F(Page 19)
CD-EN
TU-EN
MUTING G(Page 19)
SOL, REC_EN,
MOTOR_ON
E(Page 17)
11
Q8
12
Q7
13
Q6
14
Q5
6
Q3
REC_EN
SOL
MOTOR_ON
LED
DRIVE
Q249
LED103
CD
DISC SKIP
5
Q2
LED
DRIVE
Q250
LED104
TAPE
4
Q1
LED
DRIVE
Q251
LED105
TUNER
BAND
7
Q4
LED
DRIVE
Q248
LED102
MD

1919
HCD-EP707
5-4. BLOCK DIAGRAM – DISPLAY/POWER SUPPLY Section –
SYSTEM CONTROLLER
IC101 (3/3)
POWER ON/OFF
RELAY DRIVE
Q809
MAIN
POWER
TRANSFORMER
TR800
LINE
FILTER
L801
AC IN
SUB
POWER
TRANSFORMER
TR801
RE201
POWER AMP B+
D831, 836
D105
D104
D212
CD-EN
MUTING
D830
D800
RESET 10
PWDET 38
REMOTE CONTROL
RECEIVER
X101
39 REMIN
CD-EN, TU-EN,
MUTING
ROTARY
ENCODER
R216
ENCODERA
42
ENCODERB
43
S18
72
S19
71
33 – 31, 29
G1 – G9 KEY1 – KEY3, KEY5
100 – 92
S2 – S17
89 – 73
SW101 – 105,
108 – 125, 901
R216
VOLUME
FLUORESCENT
INDICATOR
TUBE
VFD1
RECT
D806 – 809
RECT
D810 – 813
RECT
D833, 834
RECT
D837
RECT
D802 – 805
B+ SWITCH
Q210, 211
B+ SWITCH
Q801, 802
+8V
CD BLOCK B+
+9V
TAPE DECK SECTION,
HEADPHONE AMP,
INPUT SELECT B+
+12V
CAPSTAN/REEL MOTOR B+
+5V
SYSTEM CONTROLLER,
EEPROM B+
STANDBY LED B+
VFD B+
VFD B–
+12V
REGULATOR
U802
+9V
REGULATOR
U700
+5V
FM/AM PLL B+
+5V
FUNCTION SELECT B+
CD DRV B+
+5V
RDS DECODER B+
+5V
TUNER B+
VOLTAGE
DETECT
Q822
POWER 2
RESET
SWITCH
Q101
G
(Page 18)
F
(Page 18)
TU-EN
POWER ON
SWITCHING
Q105
LED DRIVE
Q103
B+ SWITCH
Q206, 207
B+ SWITCH
Q209
+5V REGULATOR
Q205
+5V REGULATOR
D832, R834
AM FREQUENCY
STEP SELECT
SWITCH
Q104
AM FREQUENCY
STEP SELECT
SWITCH
Q106
+5V REGULATOR
Q821
LED101
STANDBY
RECT
D816
RDS CLKIN 37
RDS DATAIN 26 RDATA
RCLK
H
(Page 16)
(AEP, UK)
(AEP, UK)
BUFFER
Q102

2020
HCD-EP707
5-5. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS •Waveforms
– MAIN Board –
1IC201 ws XOUT (TUNER mode)
2Q228 (Collector) (REC mode)
– DISPLAY Board –
qa IC101 qa X2
Note on Printed Wiring Boards:
•X: parts extracted from the component side.
•Y: parts extracted from the conductor side.
•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 Ωand 1/4W or less unless otherwise
specified.
•2: nonflammable resistor.
•C: panel designation.
•A: B+ Line.
•B: B– Line.
•H: adjustment for repair.
•Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
():AM
[]:CD PLAY
<>: TAPE PLAY
{} : REC
∗: Impossible to measure
•Voltagesare taken withaVOM(Input impedance10MΩ).
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
J: CD PLAY
c: CD PLAY (DEGITAL OUT)
E: TAPE PLAY
a: REC
j: AUX IN
•Abbreviation
AUS:Australian model
CND : Canadian model
Note:
The components identi-
fied by mark 0or dotted
line with mark 0arecriti-
cal for safety.
Replace only with part
number specified.
Note:
Lescomposants identifiéspar
une marque 0sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce portant le numéro
spécifié.
3.1 Vp-p
138 ns
7.9 Vp-p
10.5 µs
4.5 Vp-p
238 ns
•Circuit Boards Location
main board
display board
headphone board
VOL key board
switch board
regulator board
power AMP board
speaker jack board
3IC203 qf XO
2.4 Vp-p
230 ns