Sony HCDEP-40 Service manual

HCD-EP30/EP40

SERVICE MANUAL

Ver 1.0 2001.04

HCD-EP30/EP40 are the amplifier, CD
player, tape deck and tuner section in
CMT-EP30/EP40.

Amplifier section
AUDIO POWER SPECIFICATIONS:

(US model only)

POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:

with 4 Ω loads both channels driven, from 120

- 10,000 Hz; rates 5 W per channel minimum
RMS power, with no more than 10% total
harmonic distortion from 250 mW to rated
output.

Canadian model:

Continuous RMS power output (reference)

AEP, UK models:

DIN power output (rated) 4.5 + 4.5 W
Continuous RMS power output (reference)

Music power output (reference)

Other models:

The following measured at AC 230 V, 50/60 Hz
DIN power output (rated) 4.5 + 4.5 W

Continuous RMS power output (reference)

Outputs
PHONES: Accepts headphones of
(stereo mini jack) 8 Ω or more
SPEAKER: Accepts impedance of 4 to

5 + 5 W
(4 Ω at 1 kHz, 10% THD)

(4 Ω at 1 kHz, DIN)
5 + 5 W

(4 Ω at 1 kHz, 10% THD)
13 + 13 W

(4 Ω at 1 kHz, DIN)
5 + 5 W

(4 Ω at 1 kHz, 10% THD)

16 Ω

CD player section

System Compact disc and digital
Laser Semiconductor laser

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),

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
Pan-American model: 530 - 1 710 kHz

European model:

Other models: 531 - 1 602 kHz

Antenna Built-in ferrite bar antenna
Intermediate frequency 450 kHz

Photo: HCD-EP40

CD Section CD Mechanism Type CS-21SC-1280
TAPE Section Tape Transport Mechanism Type TCM125-2

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

9-873-867-11 Sony Corporation

2001D0500-1 Home Audio Company
C 2001.4 Shinagawa Tec Service Manual Production Group

COMPACT DISC DECK RECEIVER

HCD-EP30/EP40

TABLE OF CONTENTS

1. SERVICING NOTES ................................................ 4

2. GENERAL ................................................................... 5

3. DISASSEMBLY

3-1. Disassembly Flow ........................................................... 7

3-2. Front Panel Section ......................................................... 8

3-3. MAIN Board ................................................................... 8

3-4. CD Cabinet Section......................................................... 9

3-5. CD Mechanism Deck (CS-21SC-1280) ......................... 9

3-6. Tape Mechanism Deck (TCM125-2) .............................. 10

3-7. Cassette Lid ..................................................................... 10

4. MECHANICAL ADJUSTMENTS ....................... 11

5. ELECTRICAL ADJUSTMENTS......................... 11

6. DIAGRAMS

6-1. Note for Printed Wiring Boards and

Schematic Diagrams ....................................................... 15

6-2. Schematic Diagram – MAIN Board (1/2) – .................. 16

6-3. Schematic Diagram

– MAIN (2/2)/HEADPHONE Boards – ......................... 17

6-4. Printed Wiring Boards

– MAIN/HEADPHONE Boards –.................................. 18

6-5. Printed Wiring Board – CASSETTE Board –............... 19

6-6. Schematic Diagram – CASSETTE Board –.................. 19

6-7. Printed Wiring Board – DISPLAY Board – .................. 20

6-8. Schematic Diagram – DISPLAY Board – ..................... 21

6-9. Schematic Diagram – POWER Board –........................ 22

6-10. Printed Wiring Board – POWER Board –..................... 23

6-11. IC Pin Function Description ........................................... 25

7. EXPLODED VIEWS

7-1. Cabinet Section ............................................................... 26

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

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

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.

MODEL PART No.

EP30: AEP and UK models 4-235-167-0
US and Canadian models 4-235-169-0
Singapore model 4-235-170-0
Australian model 4-235-171-0
Taiwan model 4-235-172-0
Mexican model 4-235-173-0
Argentina model 4-235-174-0
EP40: AEP and UK models 4-235-175-0
Saudi Arabia model 4-236-316-0

[]

[]

[]

[]

[]

[]

[]

[]

[]

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

LOCATION OF CONTROLS
– Front Panel –

SECTION 2

GENERAL

1 2 3456 7

HCD-EP30/EP40

This section is extracted from
instruction manual.

wk
wj
wh
wg
wf
wd

ws
wa
w;

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)
RDS (CMT-EP40 only) wg (11,

12)

REMAIN 4 (9)

qfqj qhql qk qg

Remote sensor wk
REPEAT wj (8)
SHUFFLE wa (8)
TAPE 3 (12)
TIMER indicator 2 (15)
TUNER 6 (10, 13, 15)
TUNER DSPL (CMT-EP40 only)

wh (11)
TUNER MEM w; (10)
TUNING + wd (10, 11)
TUNING — wf (10, 11)
VOLUME control qa (15)

8
9
q;

qa

qs

qd

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)
Z PUSH 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-EP30/EP40

Remote Control

w;
ql
qk
qj
qh
qg
qf
qd

1234

5
6
7
8

9
q;
qa

qs

Setting the time

1 Turn on the system.
2 Press CLOCK/TIMER/SLEEP SET on

the remote.

The clock indication appears.

3 Press TUNING/CLOCK/TIMER + or — on

the remote repeatedly to set the time.

4 Press 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.

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)
RDS (CMT-EP40 only) qh (11,

12)

REPEAT qs (8)
SHUFFLE 7 (8)
TAPE ql (12)
TIMER ON/OFF qd (15)
TUNER/BAND 5 (10, 13, 15)
TUNER DSPL (CMT-EP40 only)

qg (11)

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)

6

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

3-1. DISASSEMBLY FLOW

SET

3-2. FRONT PANEL SECTION

(Page 8)

HCD-EP30/EP40

SECTION 3

DISASSEMBLY

3-3. MAIN BOARD

(Page 8)

3-4. CD CABINET SECTION

(Page 9)

3-5. CD MECHANISM DECK

(CS-21SC-1280)
(Page 9)

3-6. TAPE MECHANISM DECK

(TCM125-2)
(Page 10)

3-7. CASSETTE LID

(Page 10)

7

HCD-EP30/EP40

)

r

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

3-2. FRONT PANEL SECTION

6

claw

5

two screws
(+K3

×

5)

8

connector
(CN203)

3

two screws
(BTP2.6

2

antenna cover cabinet

×

10)

1

screw
(BVTP3

4

two screws
(BVTP3

×

×

10)

10

3-3. MAIN BOARD

7

screw
(+BTP2.6 × 8)

7

0

qa

front panel section

8

connector
(SW600)

5

two screws
(+K3

9

connector
(CN402)

×

5)

5

two screws
(+K3

9

MAIN board

×

5)

1

connector
(CN204)

2

connecto
(CN101)

6

connector
(CN202)

5

connector
(CN201)

4

3

connector
(CN302)

connector
(CN301)

8

3-4. CD CABINET SECTION

)

2

CD cabinet section

1

two screws
(BTP2.6

HCD-EP30/EP40

×

8

3-5. CD MECHANISM DECK (CS-21SC-1280)

6

two spring clamps

7

vibration proof rubber
(pink)

4

four fiber washers

3

four pulley screws

7

vibration proof rubber
(brown)

5

8

CD mechanism deck (CS-21SC-1280)

6

two spring clamps

7

vibration proof rubber
(brown)

7

vibration proof rubber
(pink)

1

two screws
(BVTP3 × 10)

2

plastic cover

9

HCD-EP30/EP40

3-6. TAPE MECHANISM DECK (TCM125-2)

7

tape mechanism deck (TCM125-2)

6

two screws
(BVTP3

×

10)

2

two screws
(BTP2.6

3

1

4

6

two screws
(BVTP3

connector
(CN701)

cassette board

×

10)

×

6)

5

Open the cassette lid.

3-7. CASSETTE LID

2

claw

10

1

Open the cassette lid.

3

cassette lid

2

claw

SECTION 4

r

CAPSTAN/REEL
motor (M201)

Tape Speed
Adjustment

MECHANICAL ADJUSTMENTS

HCD-EP30/EP40

SECTION 5

ELECTRICAL ADJUSTMENTS

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 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

Mode Torque Meter Meter Reading

FWD CQ-102C (30 – 70 g•cm)

FWD
Back Tension

FF CQ-201B (more than 60 g•cm)

REW CQ-201B (more than 60 g•cm)

CQ-102C (1.5 – 5.5 g•cm)

• Tape T ension Measurement

Mode Tension Meter Meter Reading

FWD CQ-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 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

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

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

good wrong

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