Sony HCD-RXD3 Service Manual

HCD-GRX20/RXD3

SERVICE MANUAL

Ver 1.1 2001. 11

HCD-GRX20/RXD3 are the tuner, deck, CD
and amplifier section in MHC-GRX20/RXD3.

PHOTO : HCD-RXD3

Model Name Using Similar Mechanism NEW

CD

SECTION

TAPE

DECK

SECTION

CD Mechanism Type CX3

Base Unit Type KSM-213ECM

Optical Pick-up Type KSS-213ECM/C2NP

Model Name Using Similar Mechanism NEW

Tape Transport Mechanism Type CWL-44-FR

AEP Model

UK Model

HCD-RXD3

E Model

Australian Model

HCD-GRX20

Amplifier section

European model

DIN power output (Rated) 40 W + 40 W

(6 Ω at 1 kHz, DIN)

Continuous RMS power output (Reference)

50 W + 50 W
(6 Ω at 1 kHz, 10%
THD)

Music power output (Reference)

100 W + 100 W
(6 Ω at 1 kHz, 10%
THD)

Other models

The following measured at AC 110, 220 V 60 Hz;
DIN power output (Rated) 45 W + 45 W

(6 Ω at 1 kHz, DIN)

Continuous RMS power output (Reference)

50 W + 50 W
(6 Ω at 1 kHz, 10%

THD)
The following measured at AC 120, 240 V 60 Hz;
DIN power output (Rated) 50 W + 50 W

(6 Ω at 1 kHz, DIN)
Continuous RMS power output (Reference)

60 W + 60 W

(6 Ω at 1 kHz, 10%

THD)
Inputs

MD IN (phono jack): voltage 450 mV,

impedance 47 kΩ

SPECIFICATIONS

Outputs

MD OUT (phono jacks):

voltage 250 mV
impedance 1 kΩ

PHONES (stereo phone jack):

accepts headphones of 8
Ω or more.

SPEAKER: accepts impedance of 6

to 16 Ω

CD player section

System Compact disc and digital

audio system

Laser Semiconductor laser

(λ = 780 nm)
Emission duration:
continuous

Laser output Max. 44.6µW*

*This output is the value
measured at a distance of
200 mm from the
objective lens surface on
the Optical Pick-up
Block with 7 mm
aperture.

Frequency response 20Hz – 20kHz (±0.5 dB)
Wavelength 780 – 790 nm

MINI Hi-Fi COMPONENT SYSTEM

DIGITAL OUT (OPTICAL)
(Square optical connector jack, rear panel)
Wavelength 600 nm
Output Level –18 dBm

Tape deck section

Recording system 4-track 2-channel stereo
Frequency response 40 – 13,000 Hz (±3 dB),

using Sony TYPE I
cassette

Wow and flutter ±0.15% W. Peak(IEC)

0.1% W. RMS(NAB)
±0.2% W. Peak(DIN)

Tuner section

FM stereo, FM/AM superheterodyne tuner

FM tunr section

Tuning range 87.5 – 108.0 MHz
Antenna FM lead antenna
Antenna terminals 75 Ω unbalanced
Intermediate frequency 10.7 MHz

— Continued on next page —

9-928-949-12

20001K1600-1

© 2001.11

Sony Corporation

Home Audio Company

Published by Sony Engineering Corporation

AM tuner section

Tuning renge 531 – 1,602 kHz

(with AM tuning interval set at 9 kHz)
530 – 1,710 kHz

(with AM tuning interval set at 10 kHz)
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz

General

Power requirements

European model 230 V AC, 50/60 Hz
Mexican model 120 V AC, 50/60 Hz
Australian model 240 V AC, 50/60 Hz
Other models 110 – 120 V or 220 – 240 V AC, 50/60 Hz

(adjustable with voltage selector)
Power consumption

European model 105 W
Other models 115 W

Dimensions (w/h/d) incl. projecting parts and controls

Approx. 280 × 320 × 400 mm

(111/8 × 125/8 × 153/4 in)
Mass Approx. 9.2kg (20 lb 5 oz.)
Supplied accessories: AM loop antenna (1)

FM lead antenna (1)

Remote (1)

Plug adaptor (for Asian model) (1)
Design and specifications are subject to change without notice.

MODEL IDENTIFICATION
— CABINET, REAR —

PART NO.

PARTS No.MODEL

RXD3 model 4-221-603-0π
GRX20 : AUS model 4-221-604-0π
GRX20 : AR, E, SP, TW models 4-221-605-0π
GRX20 : MX model 4-221-606-0π

CAUTION

Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.

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 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.

Laser component in this product is capable
of emitting radiation exceeding the limit for
Class 1.

• Abbreviation
AUS : Australian model
SP : Singapore model
MX : Mexican model
AR : Argentina model
TW : Taiwan model

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK ! OR DO TTED LINE WITH
MARK ! 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.

2

TABLE OF CONTENTS

1. GENERAL ·········································································· 4

2. DISASSEMBLY

2-1. CD Door ·············································································5
2-2. Front Panel ········································································· 6
2-3. Main Board········································································· 6
2-4. Amplifier Board ································································· 7
2-5. CD Tray ·············································································· 7
2-6. Decord Board ····································································· 8
2-7. Base Unit ············································································ 9
2-8. Cassette Lid ········································································ 9

3. TEST MODE ···································································· 10

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

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

6. DIAGRAMS

6-1. Circuit Boards Location ··················································· 16
6-2. Block Diagrams ································································ 17

Main Section····································································· 17

Tuner, CD Section ····························································18
6-3. Printed Wiring Board Main Section ······························· 20
6-4. Schematic Diagram Main (1/3) Section ·························21
6-5. Schematic Diagram Main (2/3) Section ·························22
6-6. Schematic Diagram Main (3/3) Section ·························23
6-7. Printed Wiring Board Front Panel Section ····················· 24
6-8. Schematic Diagram Front Panel Section ························ 25
6-9. Printed Wiring Board Amplifier Section ························26
6-10. Schematic Diagram Amplifier Section ··························· 27
6-11. Printed Wiring Board CD Section ·································· 28
6-12. Schematic Diagram CD Section····································· 29
6-13. IC Pin Function ································································ 30
6-14. IC Block Diagrams··························································· 31

7. EXPLODED VIEWS

7-1. Cabinet Section································································· 35
7-2. Front Panel Section ·························································· 36
7-3. CD Mechanism Deck Section-1 ······································· 37
7-4. CD Mechanism Deck Section-2 ······································· 38
7-5. Base Unit Section (KSM-213ECM) ································· 39

8. ELECTRICAL PARTS LIST ······································· 40

3

3

SECTION 1

GENERAL

4

56 7 8 9

2

1
#£

#™
#¡
#º
@ª

@•

@¶

@§

1 1/u (Power) button
2 TIMER SELECT button
3 CLOCK/TIMER SET button
4 ( (TAPE A) button
5 9 (TAPE B) button
6 ( (TAPE B) button
7 p (STOP) button
8 ^ (CD) button
9 DISPLAY/DEMO button
!º FUNCTION button
!¡ TUNER/BAND button
!™ + button
!£ + + button
!¢ CD SYNC button
!∞ PAUSE button
!§ REC button

@∞

!º
!¡
!™

!£

!¢

!∞

!§

!¶

!•

!ª
@º
@¡

@¢

@£

@™

!¶ 6 OPEN/CLOSE button
!• DISC SKIP/EX-CHANGE button
!ª DISC 3 button
@º DISC 2 button
@¡ DISC 1 button
@™ DECK B
@£ ENTER/NEXT button
@¢ VOLUME knob
@∞ DECK A
@§ REPEAT/STEREO/MONO button
@¶ PLAY MODE/TUNER MEMORY button
@• EDIT/DIRECTION button
@ª DBFB button
#º FILE SELECT button
#¡ PHONES jack
#™ = – button
#£ = button

4

SECTION 2

8

CD door

5

Top cover

4

Remove the

claws

4

Remove the

claws

7

Remove the

claws

2

Three screws

1

Three srews

3

Five screws

6

Pull out the CD tray and remove the
CD door with releasing claws into the
directioin of arrow.

DISASSEMBLY

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

2-1. CD DOOR

5

2-2. FRONT PANEL

e

MAIN board

!º

Front panel

8

Remove the

claws

9

Board to board
connectors
(CN602)
(CN601)

3

Harness

(CN303)

1

Three screws

2

Screw

6

Connector

(to deckB)

7

Connector

(CN201)

4

(CN705)

5

Flat type wire

(CN501)

Flat type wir

2-3. MAIN BOARD

4

CD mechanism deck

1

Harness (CN301)

7

MAIN board

3

Connector

(CN703)

2

T wo screws

6

Five screws

5

Harness (CN701)

6

2-4. AMPLIFIER BOARD

s

e

!º

AMPLIFIER board

1

Connector

(CN703)

9

Three screws

8

Three screws

5

Remove the claws

6

Rear cover

2

T wo screws

3

Three screw

2-5. CD TRA Y

2

Bracket

7

Three screws

1

Screw

4

T wo screws

5

Flat type wir

(CN06)

Screw

3

4

Bracket

6

CD tray

7

2-6. DECORD BOARD

)

6

1

(CN706)

2

Connector

(CN707)

5

Connector

(CN702)

CD decode board

Flat cable

4

Three screws

3

Flat cable (CN701

8

2-7. BASE UNIT

5

UD-Cam

4

Screw

2

Screw

3

UD-gear

2-8. CASSETTE LID

8

Spring

9

Base unit

7

Spring

6

Spring

1

T wo screws

Cassette door
(Note: Four claws are used.)

9

SECTION 3

TEST MODE

Function Key combination Description

Initialization

STOP + POWER OFF All preset data is re-set to the initial
(default) value.

Model display

STOP + DISC 1 Mode name is displayed.

Destination display

STOP + DISC 2 Destination is displayed.

Version display

STOP + DISC 3 Version number of the
microprocessor is displayed.

CD aging mode

STOP + DISC SKIP/EX-CHANGE Set discs to DISC 1 and DISC

3. The following operations are repeated when aging

starts:

1. DISC 1: TOC Read

2. Plays back the last music of the DISC 1.

3. DISC 3 : TOC Read

4. Plays back the last music of the DISC 3.

5. STOP

6. Tray is open and closed.

CD service mode

STOP + OPEN/CLOSE The message “CD S - -” is displayed on the
screen. The sled is moved to the outer circumference
while the FF button is pressed. Also, the SLED is moved to the
inner
circumference while the REW button is pressed. After pressing the
PLA Y
button, FOCUS is turned ON, CL V-S is set, TRACKING and SLED
servos
are turned OFF and ADDRESS 3 = 3F, 37 is set.

Display

STOP + DBFB All displays are turned ON.

Balance adjustment value

STOP + DISPLAY/DEMO The balance adjustment value is
displayed.

Key check

STOP + FILE SELECT Function of the pressed key is displayed.

TAPE aging mode

STOP + PLAY A Insert a commercially available cassette tape (10
min) to the decks A and B. When aging starts, each tape is rewound
and the following

operations are repeated:

1. TAPE A: FWD PLAY for one minute

2. TAPE A: FWD STOP for one second

3. TAPE A: FWD PLAY for three minutes

4. TAPE A: FWD FF to tape end

5. TAPE B: FWD PLAY for one minute

6. TAPE B: FWD REC PAUSE for one second

7. TAPE B: FWD REC for three minutes

8. TAPE B: FWD FF to tape end

9. TAPE B: REV PLAY for one minute

10. TAPE B: REV REC PAUSE for one second

11. TAPE B: REV REC for three minutes

12. TAPE B: REV FF to tape end.

10

SECTION 4

MECHANICAL ADJUSTMENTS

SECTION 5

ELECTRICAL ADJUSTMENTS

Precaution

1. Clean the following parts with a denatured alcohol-moistened
swab:
record/playback head pinch rollers
erase head rubber belts
capstan idlers

2. Demagnetize the record/playback head with a head
demagnetizer.

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

Torque

FWD
FWD

back tension

FF/REW

Torque meter

CQ-102C

CQ-102C

CQ-201B

Meter reading

40 to 70 g • cm

(0.56 - 0.97 oz • inch)

1 to 5 g • cm

(0.01 - 0.07 oz • inch)

55 to 140 g • cm

(0.76 - 1.94 oz • inch)

DECK SECTION 0 dB=0.775V

1. Demagnetize the record/playback head with a head
demagnetizer.

2. Do not use a magnetized screwdriver for the adjustments.

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

4. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.

5. The adjustments should be performed in the order given in this
service manual. (As a general rule, playback circuit adjustment
should be completed before performing recording circuit
adjustment.)

6. The adjustments should be performed for both L-CH and R­CH.

Tape

P-4-A100

WS-48B

Record/Playback Head Azimuth Adjustment
(Deck A, Deck B)

Note: Perform this adjustments for both decks.

Procedure:

1. Mode : Playback

Signal

10 kHz, –10 dB

3 kHz, 0 dB

Used for

Azimuth Adjustment

Tape Speed Adjustment

test tape
P-4-A100
(10kHz, –10dB)

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 2 dB of peak.

L-CH
peak

screw
position

output
level

R-CH
peak

SPEAKER
terminal (JK401)

set

within
2dB

L-CH
peak

R-CH
peak

level meter

within 2dB

screw
position

11

3. Mode: Playback

e

r

Tape Speed Adjustment (Deck A)

test tape
P-4-A100
(10kHz, –10dB)

in phase 45˚ 90˚ 135˚ 180˚

SPEAKER
terminal (JK401)
(L-CH)

L

R

SPEAKER
terminal (JK401)
(R-CH)

Waveform of oscilloscope

good wrong

oscilloscop

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

Adjustment Location:

Remove the cassette lid before adjustment (See page 9)

Procedure:

1. Mode: Playback

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

set

SPEAKER
terminal (JK401)

frequency counte

+
–

2. Adjust the SFR501 so that the frequency counter reads 3,000
Hz ± 90Hz.

Adjustment Location: MAIN board

Sample Value of Wow and flutter

W. RMS (JIS) within 0.3%
(test tape: WS-48B)

[MAIN BOARD] — Component side —

CN601

Adjustment screws
REC/PB head (deck B)
or PB head (deck A)

Tape Speed

CN501

SFR501

12

TUNER SECTION 0 dB=1µV

r

AM T uning Voltage Adjustment

Main board

TP1

G
VT

DC voltmete

+
–

Procedure:

1. Set the reception frequency of the unit to 530 kHz.

2. Adjust L105 for 1.2 ± 0.05 V reading on the DC voltmeter.

3. Set the reception frequency of the unit to 1,710 kHz.

4. Confirm that the voltage reading on the DC voltmeter is within

8.0 ± 0.5 V.

Adjustment Location: MAIN board (See page 14)

AM T racking Adjustment

loop antenna

AM RF SSG

loop antenna
(Supplied accessories)

set

30% amplitude
modulation by
400 Hz signal

Field strength dB (

Procedure:

1. Tune the set to 600 kHz.

2. Set the output of AM RF SSG so that the input level of the set
will become 60 dB (µV/m).

3. Adjust L104 so that when the waveform on the oscilloscope is
maximum, no noise appears.

4. Tune the set to 1,400 kHz.

60 cm

µ

V/m) =SSG output level dB (µV/m) –26 dB.

AM ANTENNA
terminal (TM1)

5. Adjust TC102 so that when the waveform on the oscilloscope
is maximum, no noise appears.

• Repeat the procedures in each adjustment several times, and the

tracking adjustment should be finally done by the trimmer
capacitors.

Adjustment Location: MAIN board (See page 14)

13

FM Tuned Level Adjustment

FM RF SSG

Ω

coaxial

75

set

Carrier frequency : 98 MHz
Modulation : AUDIO 1 kHz, 75 kHz
deviation (100%)
Output level : 28 dB (at 75 W open)

FM ANTENNA terminal
(JK101)

Procedure:

1. Supply a 28 dB 98 MHz signal from the ANTENN A terminal.

2. Tune the set to 98 MHz.

3. Adjust SFR101 to the point (moment) when the TUNED
indicator will change from going off to going on.

Adjustment Location: MAIN board

Adjustment Location

[MAIN BOARD] — Component side —

JK101

L104

TC102

AM T rac king

AM T uning
Voltage

L105

SFR101

TP1

FM T uned Level

14

CD SECTION

V

Note:

1. CD Block is basically constructed to operate without
adjustment. Therefore, 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 10MΩ impedance.

4. Clean the object lens by an applicator with neutral detergent
when the signal level is low than specified value with the
following checks.

5. Adjust the focus bias adjustment when optical block is replaced.

RF Level Check

CD DECODER
board

TP (RF)
TP (VC)

oscilloscope

Procedure :

1. Connect oscilloscope to test point TP (RF) on CD DECODER
board.

2. Turned Power switch on.

3. Put disc (YEDS-18) in and playback.

4. Confirm that oscilloscope waveform is clear and check RF
signal level is correct or not.

Note: Clear RF signal waveform means that the shape “◊” can be

clearly distinguished at the center of the waveform.

VOLT/DIV: 200 m
TIME/DIV: 500 nS

level: 1.0 Vp-p

+0.3
–0.2

Adjustment Location:

[CD DECODER BOARD] — Component side —

IC702

J778

TP (VC)

IC701

J789

CN701

TP

(RF)

15

6-1. CIRCUIT BOARDS LOCATION

SECTION 6

DIAGRAMS

SENSOR board

H/P board

SW (C) board

MAIN board

VR board

SW (D) board

SW (B) board

MOTOR (6P) (S) board

MOTOR board

PHOTO SOCKET board

SW (A) board

CD DECORD board

TR board

AC SWITCH board

FUSE board

AMPLIFIER board

FRONT board

16

6-2. BLOCK DIAGRAMS

MAIN SECTION

CD L

B

CD

SECTION

JK301

(Page 18)

L

MD

TAPE B

HP901

PB

HEAD

TAPE A

HRP901
REC/PB

HEAD

HE901
ERASE

HEAD

A

TUNER
SECTION
(Page 18)

C

CD

SECTION

(Page 18)

R

TU L

ST IND

TU MUTE

DO1

DATA IN

SCOR

SENS1

SQSO

SENS2

XLAT
SQCK

CLK

DATA

LOCK

CLK

STB

R CH

R CHR CH

R CH

Q203, 205

PLAY/REC
CONTROL

Q207

Q207

PLAY/REC
CONTROL

DRIVE

D202

DI

CE

11

STB

16

Q201

CE

21CE25

PLAY/REC
CONTROL

DI

CLK

27

SCLK

SDATA OUT

D201

12

39

LOCK

XTAL

X601

10MHz

L291

BIAS OSC

Q208,209

MUTE

24

13

CLOK

DATA22SQCK

XTAL

40

HCD-GRX20/RXD3

JK301

LINE AMP

IC301

2

REC/PB
EQ AMP

IC201

3
1

2

9

R CH

Q251

BIAS
OSC

Q252,253

BIAS

SWITCH

20

23

42

4

26

62

SDATA IN

28

TU MUTE

43

XLAT

A

SENS2

VR UP

52

VR601

VOLUME

SQSO

53

SCOR

SENS1

VR DOWN

B

REC OUT

Q551,552

FM ST IND

46

CD DECK

UP/DOWN

A/B

6

AMS

37

PIC UP

S01

DET

19

AMS

47

PB OUT

TAPE A/B

DI

CLK

ALATCH

PIC DOWN

5

19

11
10

LED DRIVE

IC602

2
3
4

SYSTEM CONTROLLER/

TRAY OPEN

50

S02

TRAY

OPEN/CLOSE

DET

13

.

10

8

.
5

11

12

FLD DRIVER

TRAY CLOSE

51

IC601

LED602-607

Q607,608

LED

DRIVE

S03

DISC

COUNTER

DET

DISC COUNT

48

Q351

LED601

Q213
MUTE

49

S04
TURNTABLE
OPERATION

DET

TURN TABLE

17

CTRL

Q320

KI0 KI2

KEY

MATRIX

S601-629

CD (L)

5

MD (L)

4

TAPE (L)

3

TUNER (L)

11

CONT

13

REC MUTE

11

A/B

12

BIAS

14

PLAY MUTE

10

Q'S

1

STB

DI

2

DI

CLK

3

CLK

CLK

2

CK

1

S/L

9

QH

10

9

S/L

DATA IN

9VOL OUT

REC OUT AMP

1

BUS REGISTER

IC501

4PLAY

5SOL A

SOL B

6

SHIFT REGISTER

IC502

B REC FWD

3

B REC REV

4

PHOTO A

5

PHOTO B

6

A MODE SW

11
12B MODE SW

A HALF

13

B HALF

14

RESET

38

Q602

RESET

SWITCH

Q306

M+12V

Q601

DOWN DET

Q505,506

Q503,504

POWER DOWN

6

POWER

VCCVCC

Q501,502

M+12V

SWITCH

SOL A
DRIVE

SOL B
DRIVE

SFR501

MOTOR H/L

Q302

RM601

SPEANA

34

33

SPEANA 1

REMOTE

8

2

REMOTE
CONTROL
RECEIVER

3

VCC

MECHA
BLOCK

36

35

SPEANA 3

SPEANA 2

SPEANA 4

61

32

VACS

MD MUTE

P2 P24

66 8829 31

Q320

Q551

MUTE

Q411
MUTE

DRIVE

64

POWER SW

21.100 90

FLD601

FLD DISPLAY

63

SYSTEM MUTE

G1 G13

.

Q401
MUTE

Q603,604

MUTE

SWITCH

IC401 B+

CD +7.5V

POWER AMP

IC401

14 7

IC401 B-

-12V

-27V

+12V

+5.6V

µCON B+

VCC

+5V

Q703

D602
D601

P MUTE

CONT

D713

D704

SITCHING

Q705

Q702
+7.5V

REG

Q308
+5.6V

REG

D405

Q403

Q405

AC OFF

Q705

-27V
REG

Q701
+12V

REG

Q412
MUTE

Q704

DET

1

2

D406

IC402

SPEAKER

RELAY
DRIVE

4

D705-708

D701

RECT

RECT

R CH

RL401

6

T001

AC4.8V
AC4.8V

L

LINE OUT

R

JK401

SPEAKER

GRX20 : AUS, RXD3 MODEL

GRX20 : E,SP,TW,MX,AR MODELS

F703

GRX20:
E,SP,TW
MODELS

• RCH is omitted

• Signal Path

• Abbreviation
AUS : Australian model
SP : Singapore model
MX : Mexican model
AR : Argentina model
TW : Taiwan model

F702

AC IN

F702

SW401

AC VOLTAGE
220 – 240 V

110 – 120 V

: PB (DECK A)

: PB (DECK B)

: REC (DECK B)

: FM

: CD

: MD

AC IN

1717