Sony HCDEP-30 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.	Photo: HCD-EP40

US Model

Canadian Model

E Model

Australian Model

HCD-EP30

AEP Model

UK Model

HCD-EP30/EP40

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

SPECIFICATIONS

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) 5 + 5 W

(4 Ω at 1 kHz, 10% THD)

AEP, UK models:

DIN power output (rated) 4.5 + 4.5 W

(4 Ω at 1 kHz, DIN) Continuous RMS power output (reference)

5 + 5 W

(4 Ω at 1 kHz, 10% THD) Music power output (reference)

13 + 13 W

Other models:

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

(4 Ω at 1 kHz, DIN) Continuous RMS power output (reference)

5 + 5 W

(4 Ω at 1 kHz, 10% THD)

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

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
	Pan-American model:	530 - 1 710 kHz
		(with the interval set at
		10 kHz)
		531 - 1 602 kHz
		(with the interval set at
	European model:	9 kHz)
		531 -1 602 kHz
		(with the interval set at
		9 kHz)
	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	Built-in ferrite bar antenna
	Intermediate frequency	450 kHz

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
	0.9 W (in the standby
	mode)
Other models:	30 W
Dimensions (w/h/d):	Approx. 145 × 238 × 238 mm
Mass:	Approx. 2.8 kg

Design and specifications are subject to change without notice.

COMPACT DISC DECK RECEIVER

9-873-867-11	Sony Corporation
2001D0500-1	Home Audio Company
C 2001.4	Shinagawa Tec Service Manual Production Group

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

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. 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” 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 AC range are suitable. (See Fig. A)

To Exposed Metal

Parts on Set

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.

0.15 µ F				1.5 kΩ	AC
					voltmeter
					(0.75 V)

Earth Ground

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.

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 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	• MODEL IDENTIFICATION
		– Bottom View –
	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.

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.

SW600

		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[]

TO PREVENT ‘TAPE OSCILLATION SOUND AT VOLUME’ 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

	SECTION 2
	GENERAL
	LOCATION OF CONTROLS
	– Front Panel –
	1 2 3 4 5 6	7
		8
	wk	9
	wj
	wh	q;
	wg
	wf	qa
	wd
	ws	qs
	wa	qd
	w;

HCD-EP30/EP40

This section is extracted from instruction manual.

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)

ql qk qj qh qg qf

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)

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-EP30/EP40

Remote Control

1 2 34

	w;	5
	ql
		6
	qk
		7
	qj
		8
	qh
		9
	qg	q;
	qf	qa
	qd	qs

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)

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.

6

SECTION 3

DISASSEMBLY

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

3-1. DISASSEMBLY FLOW

SET

3-2.	FRONT PANEL SECTION
	(Page 8)
3-3.	MAIN BOARD		3-4.	CD CABINET SECTION
	(Page 8)			(Page 9)
			3-5.	CD MECHANISM DECK
				(CS-21SC-1280)
				(Page 9)

HCD-EP30/EP40

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

(Page 10)

3-7. CASSETTE LID (Page 10)

7

HCD-EP30/EP40

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

3-2. FRONT PANEL SECTION

	2 antenna cover cabinet
3 two screws
(BTP2.6 ×	10)
6 claw
5 two screws
(+K3 × 5)	1 screw

(BVTP3 × 10)

8 connector (CN203)

4 two screws (BVTP3 × 10)

5 two screws

(+K3 × 5)

9 connector (CN402)

7

5 two screws

0 connector (+K3 × 5) (SW600)

qa front panel section

3-3. MAIN BOARD

8	9 MAIN board
7 screw
(+BTP2.6 × 8)
	1 connector
	(CN204)
	2 connector
	(CN101)
	3 connector
	(CN301)
	4 connector
	(CN302)
	5 connector
	(CN201)
	6 connector
	(CN202)

8

HCD-EP30/EP40

3-4. CD CABINET SECTION

2 CD cabinet section

1 two screws (BTP2.6 × 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

1 two screws (BVTP3 × 10)

7vibration proof rubber (brown)

5 8 CD mechanism deck (CS-21SC-1280)

6 two spring clamps

7 vibration proof rubber (brown)

7vibration proof rubber (pink)

2 plastic cover

9

HCD-EP30/EP40

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

2 two screws
(BTP2.6 × 6)	1 connector
	(CN701)

6 two screws

(BVTP3 × 10)

7 tape mechanism deck (TCM125-2)

4 cassette board

3

6 two screws (BVTP3 × 10)

5 Open the cassette lid.

3-7. CASSETTE LID

2 claw

1 Open the cassette lid.

2 claw

3 cassette lid

10

SECTION 4

MECHANICAL 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
			2.95 –6.86 mN•m
	FWD	CQ-102C	(30 –70 g•cm)
			(0.42 –0.97 oz•inch)
	FWD		0.15 –5.39 mN•m
		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)

• Tape Tension Measurement

	Mode	Tension Meter	Meter Reading
	FWD	CQ-403A	more than 100 g
			(more than 3.53 oz)

HCD-EP30/EP40 SECTION 5

ELECTRICAL ADJUSTMENTS

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 frequency counter (3 kHz, 0 dB)

		32 Ω
	set	+
		–

HEADPHONE board

PHONES jack (JK401)

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:

CAPSTAN/REEL motor (M201)

Tape Speed

Adjustment

11

HCD-EP30/EP40

Record/Playback Head Azimuth Adjustment

Procedure:

1. Mode: Playback (FWD)

	test tape
	P-4-A063	level meter
	(6.3 kHz, –10 dB)
		32 Ω
	set	+
		–
		HEADPHONE board
		PHONES jack (JK401)

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.

L-CH	within
	1dB
peak			within
Output
			1dB
level
R-CH
peak			Screw
Screw
position	L-CH	R-CH	position
	peak	peak

3. Mode: Playback (FWD)

test tape
P-4-A063
(6.3 kHz, –10 dB)	oscilloscope
L-CH	32 Ω
set	V+	+H
	–	–
R-CH	32 Ω
	HEADPHONE board
	PHONES jack (JK401)

screen pattern

in phase 45 ° 90 ° 135 ° 180 °

good wrong

4.Repeat step 1 to 3 in playback (REV) mode.

5.After the adjustments, apply suitable locking compound to the parts adjusted.

Adjustment Location: Record/Playback/Erase Head.

Note: Refer to “3-7. CASSETTE LID” (see page 10)

12