Sony HCD-EP707 Service Manual

HCD-EP707

SERVICE MANUAL

Ver 1.0 2002.06

HCD-EP707 is the amplifier, CD
player , tape deck and tuner section
in CMT-EP707.

CD
Section

TAPE
Section

SPECIFICATIONS

US Model

Canadian Model

AEP Model

UK Model

Austr alian Model

Model Name Using Similar Mechanism NEW
CD Mechanism Type CMCJ-0132
Model Name Using Similar Mechanism HCD-EP505
Tape T ransport Mechanism T ype CRL4349

AUDIO POWER SPECIFICATIONS:
(U.S.A. model only)

POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:

with 4 Ω loads 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)

European model:

DIN power output (rated) 12 + 12 W
Continuous RMS power output (reference)

Music power output (reference)

Other model:

The following measured at AC 230 V or AC 120 V,
50/60 Hz
DIN power output (rated) 12 + 12 W

Continuous RMS power output (reference)

Inputs
MD IN (phono jacks): voltage 450 mV,

Outputs
PHONES: Accepts headphones of
(stereo mini jack) 8 Ω or more
SPEAKER: Accepts impedance of 8 to

15 + 15 W
(4 Ω at 1 kHz, 10% THD)

(4 Ω at 1 kHz, DIN)
15 + 15 W

(4 Ω at 1 kHz, 10% THD)
38 + 38 W

(4 Ω at 1 kHz, DIN)
15 + 15 W

(4 Ω at 1 kHz, 10% THD)

impedance 47 kilohms

16 Ω

CD player section

System Compact disc and digital
Laser Semiconductor laser

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),

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)

Intermediate frequency 10.7 MHz

AM tuner section

Tuning range
Pan-American model: 530 - 1 710 kHz

European model: 531 -1 602 kHz

audio system
(λ=780 nm)

Emission duration:
continuous

using Sony TYPE I
cassette

75 Ω coaxial

(with the interval set at
10 kHz)
531 - 1 710 kHz
(with the interval set at
9 kHz)

(with the interval set at
9 kHz)

Other models: 531 - 1 602 kHz

Antenna AM loop antenna
Intermediate frequency 450 kHz

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

Other models: 38 W
Dimensions (w/h/d):
Mass: Approx. 5.0 kg
Supplied accessories: AM loop antenna (1)

Design and specifications are subject to change
without notice.

(with the interval set at
9 kHz)
530 - 1 710 kHz
(with the interval set at
10 kHz)

0.5 W (in the standby
mode)

Approx. 180 × 246 × 335 mm

Remote Commander (1)
Batteries (2)
FM lead antenna (1)
(Except for European
model)

9-874-043-01 Sony Corporation

2002F0500-1 Home Audio Company
C 2002.06 Published by Sony Engineering Corporation

COMPACT DISC DECK RECEIVER

HCD-EP707

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.

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 ra­diation exposure.

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-63T rd 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)

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED
LINE WITH MARK 0 ON THE SCHEMATIC DIA GRAMS
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.

To Exposed Metal
Parts on Set

AC

1.5 k

0.15 µF

Fig. A. Using an AC voltmeter to check AC leakage.

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!

LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE 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.

Ω

Earth Ground

voltmete
(0.75 V)

2

HCD-EP707

SECTION 1

SERVICING NOTES

TABLE OF CONTENTS

1. SERVICING NOTES ................................................ 3

2. GENERAL ................................................................... 4

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 ............................................................................. 11

3-12. Optical Block, Belt.......................................................... 12

4. ELECTRICAL ADJUSTMENTS......................... 13

5. DIAGRAMS

5-1. Block Diagram – TUNER Section – ............................. 14

5-2. Block Diagram – TAPE DECK Section –..................... 15

5-3. Block Diagram – MAIN Section – ................................ 16

5-4. Block Diagram

– DISPLAY/POWER SUPPLY Section – ...................... 17

5-5. Note for Printed Wiring Boards and

Schematic Diagrams ....................................................... 18

5-6. Printed Wiring Boards – MAIN Section – .................... 19

5-7. Schematic Diagram – MAIN Section (1/2) – ................ 20

5-8. Schematic Diagram – MAIN Section (2/2) – ................ 21

5-9. Printed Wiring Boards – POWER AMP Section – ...... 22

5-10. Schematic Diagram – POWER AMP Section –............ 23

5-11. Printed Wiring Boards – DISPLAY Section – .............. 24

5-12. Schematic Diagram – DISPLAY Section –................... 25

5-13. Printed Wiring Boards – REGULATOR Section – ....... 26

5-14. Schematic Diagram – REGULATOR Section – ........... 27

5-15. IC Pin Function Description ........................................... 29

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 objective lens.

• MODEL IDENTIFICATION
– Rear View –

6. EXPLODED VIEWS

6-1. Panel Section ................................................................... 31

6-2. Front Panel Section ......................................................... 32

6-3. Top Cabinet Section ........................................................ 33

6-4. Chassis Section ............................................................... 34

6-5. CD Section ...................................................................... 35

7. ELECTRICAL PARTS LIST ............................... 36

Model

US and Canadian
models

Other models

Power Voltage Indication

Power Voltage

Indication

AC: 120 V 60 Hz 38 W
AC: 230 V - 50/60 Hz 38 W

3

HCD-EP707

LOCATION OF CONTROLS
– Front Panel –

Main unit

SECTION 2

GENERAL

This section is extracted from
instruction manual.

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

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

– Back Panel –

FM antenna*

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

1 Connect the speakers.

Connect the speaker cords to the SPEAKER
terminals as shown below.

Insert only the
stripped portion.

Red (3)

Black (#)

4

Left speakerRight speaker

* Except for European model

2 Connect the AM antenna.

Set up the AM loop antenna, then connect
it.

AM loop antenna

3 Connect the FM antenna (except for

European model).

Extend the FM lead
antenna horizontally.

4 Connect the power cord to a wall outlet.

If the supplied adaptor on the plug does not
fit your wall outlet, detach it from the plug
(only for models equipped with the
adaptor).

To turn on the system, press [/ 1 (power).

HCD-EP707

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

Setting the clock

1

Turn on the system.

2

Press CLOCK/TIMER SET on the
remote.

3

Press CLOCK/TIMER SET on the
remote to select “SET CLK”, then press
ENTER.

4

Press . or > on the remote
repeatedly to set the hour.

5

Press ENTER.

6

Press . or > on the remote
repeatedly to set the minute.

7

Press ENTER.

The clock starts working.

If you make a mistake

Perform from step 1.

Note

The clock settings are canceled when you disconnect
the power cord or if a power failure occurs.

ALPHABETICAL ORDER

BUTTON DESCRIPTIONS

5

HCD-EP707

• This set can be disassembled in the order shown below.

3-1. DISASSEMBLY FLOW

SET

3-2. SIDE (PANEL)

(Page 7)

SECTION 3

DISASSEMBLY

3-3. TOP CABINET SECTION

(Page 7)

3-6. MAIN BOARD

(Page 9)

3-7. CD MECHANISM DECK

(CMCJ-0132)
(Page 9)

3-8. REGULATOR BOARD

(Page 10)

3-9. POWER AMP BOARD

(Page 10)

3-4. TAPE MECHANISM DECK

(CRL4349)
(Page 8)

3-10.COVER

(Page 11)

3-11.DRAWER

(Page 11)

3-12.OPTICAL BLOCK, BELT

(Page 12)

3-5. FRONT PANEL SECTION

(Page 8)

6

Note: Follow the disassembly procedure in the numerical order given.

3-2. SIDE (PANEL)

2

three screws

×

8)

(KTP3

3

screw
(BVTP3

×

10)

4

side (panel) (L)

1

three screws
(KTP3

HCD-EP707

×

8)

8

side (panel) (R)

5

three screws

×

8)

(KTP3

3-3. TOP CABINET SECTION

5

3

connector

claw

7

screw
(BVTP3

×

10)

4

6

top cabinet section

6

three screws
(KTP3

×

8)

2

two claws

1

connector
(CON209)

7

HCD-EP707

k

r

3-4. TAPE MECHANISM DECK (CRL4349)

4

four screws
(BVTP3 × 10)

2

tape mechanism dec
(CRL4349)

3-5. FRONT PANEL SECTION

3

connector
(CON806)

9

front panel section

6

screws
(BVTP3 × 10)

1

Remove a solder.

3

connector
(CON208)

3

connector
(CON207)

3

connector
(CON205)

3

connector
(CON203)

7

two screws
(BVTP3 × 12)

3

connector
(CON211)

2

connecto

2

connector
(CON810)

8

two claws

5

two screws
(KTP3 × 8)

4

two rubbers (foot)

6

screws
(BVTP3

×

10)

8

3-6. MAIN BOARD

)

)

2

2

connector
(CON207)

3

two screws

(BVTP3

×

12)

2

connector
(CON210)

2

2

connector
(CON216)

connector
(CON208)

connector
(CON205)

2

connector
(CON203)

2

connector
(CON211)

1

Remove a solder.

2

connector
(CON214)

2

connector
(CON215)

4

screw
(BTP2.6

5

antenna jack cover

6

two screws
(BVTT2

7

AEP, UK

×

8)

×

8)

two screws
(BVTP3

HCD-EP707

×

10

8

main board

2

connector

3-7. CD MECHANISM DECK (CMCJ-0132)

2

connector

2

connector

3

two screws
(BVTP3 × 10)

4

CD mechanism deck (CMCJ-0132)

1

connector

3

two screws
(BVTP3 × 10

9

HCD-EP707

)

3-8. REGULATOR BOARD

1

connector
(CON810)

2

two screws
(BVTP3

×

8)

3-9. POWER AMP BOARD

3

three claws

4

6

regulator board

3

rear (cover)

Remove twelve solders.

5

regulator board

(bottom side view)

5

connector
(CON801)

5

connector
(CON808)

7

power amp board

6

four screws
(BVTP3

×

8)

4

connector
(CON214)

4

connector
(CON800)

1

four screws
(BVTP3

2

screw
(KTP3

×

10)

×

8

10

3-10. COVER

s

r

1

two screws

2

cover

1

two screw

HCD-EP707

3-11. DRAWER

3

two claws

1

two screws

2

arm

4

drawe

3

two claws

11

HCD-EP707

s

3-12. OPTICAL BLOCK, BELT

5

two cushions

1

four screws

four washers

2

5

two cushion

7

4

belt

flexible cable

7

belt

3

6

optical block

12

)

SECTION 4

ELECTRICAL ADJUSTMENTS

HCD-EP707

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

Tape Speed Adjustment

Setting:

Function: TAPE

test tape
WS-48B
(3 kHz, 0 dB)

set

Procedure:

1. Playback WS-48B (tape center) in the FWD state.

2. Adjsut the volume in CAPSTAN/REEL motor so that the fre­quency counter reading becomes 3,000 Hz.

Specified V alue: 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.

frequency counter

47 kΩ

+
–

SPEAKER JACK board
SPEAKER terminal (SP801)

TUNER SECTION 0 dB=1 µV

[AM]

Setting:

Function: TUNER
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
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

MAIN board
TP (GND)

TP (VT)

TP (GND)

TP (FM ANT)

set

0.01 µF

MAIN board

SPEAKER JACK board
SPEAKER terminal (SP801

digital voltmeter

100 kΩ

level meter

32 Ω

+
–

level meter

32 Ω

+
–

SPEAKER JACK board
SPEAKER terminal (SP801)

( ): 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

Confirmation

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 1.6 V)

Confirmation 108 MHz 6.3 to 7.3 V (7.3 to 8.5 V)

Adjust for a maximum reading on level meter

L203 90.1 MHz

VC202 106.1 MHz

530 kHz

(531 kHz)

1,710 kHz 7.8 ± 0.5 V

(1,602 kHz) (7.1 ± 0.5 V)

AM TRACKING ADJUSTMENT

FM TRACKING ADJUSTMENT

1.3 ± 0.1 V

Adjustment Location and Connecting Points

– MAIN BOARD (Component Side) –

L203
VC202

L204 FM Frequency Coverage Adjustment

IFT201 AM Frequency Coverage Adjustment

FM Tracking Adjustment

}

IFT205 AM IF Adjustment

IFT202
VC205

AM Tracking Adjustment

}

– MAIN BOARD (Conductor Side) –

TP

(VT)

TP

(GND)

TP

(FM ANT)

Adjustment Location:

CAPSTAN/REEL
motor

Tape Speed
Adjustment

Sample Value of Wow and Flutter: 0.3% or less W. RMS (JIS)

(WS-48B)

•Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.

1313

HCD-EP707

SECTION 5

DIAGRAMS

5-1. BLOCK DIAGRAM – TUNER Section –

CON201

FM ANT

75Ω

COAXIAL

CON202

AM ANT

• R-ch is omitted due
to same as L-ch.

• SIGNAL PATH

: FM

: AM

IFT202
AM RF

VC205

IFT202, VC205

AM TRACKING

L203, VC202

FM TRACKING

BPF201

BPF

Q201

L203

FM RF

IFT201

AM OSC

IFT201

AM FREQUENCY

COVERAGE

VC202

CF203

22

FMRF OUT

FMRF IN FMIF

24 5 10

AMRF IN

1

AM

3

OSC

13

FM DET

FM

MIX

AM

MIX

AMOSC

BUFFER

FMOSC

AM/FMIF

BUFFER

MONO/ST

AM/FM SW

FM/AM IF AMP,

MIX, DET, MPX, OSC

IC202

CF201

IFT205

AM IF

9 11

CF202

8

20

7

14

15

FM OSC BUFFER

Q252

L204

FM FREQUENCY

COVERAGE

FM/AM

SELECT SWITCH

Q204

L. P. F

(AEP, UK)

BUFFER

Q208

19

DET OUT

L OUT

16

R OUT

17

R-CH

AMIF

XIN

XOUT

BUFFER

Q202

CF204

7.2MHz

1

20

DI

4

CL

5

CE

3

DO

6

12

AGC

16

15

FMIN

AMIN

IFIN

12

IO1

11

BO2

8

FM/AM PLL

BO1

7

AOUT

20

AIN

19

PD

18

IC201

4

TU-L

TU-R

MUX

STATION

STEREO

DA IN
CLOCK
PLL CE

DA OUT

CF205

4.332MHz

13

XI

RDS DECODER

IC203

14

XO

RCLK

RDAT

RCLK

16

RDATA

2

H

A

B

(Page 17)

(Page 16)

(Page 16)

1414