Sony sony hcd-sd1 User manual

– 1 –

MICROFILM

HCD-SD1

SPECIFICATIONS

SERVICE MANUAL

COMPACT DISC RECEIVER

— Continued on next page —

AEP Model

UK Model

E Model

HCD-SD1 is the amplifier, CD and

tuner section in CMT-SD1.

Model Name Using Similar Mechanism HCD-MD313

Mechanism Type CDM13B-5BD19

Base Unit Type BU-5BD19

Optical Pick-up Type KSS-213B/K-N

CD

SECTION

– 2 –

CAUTION

Use of controls or adjustments or performance of procedures

other than those specified herein may result in hazardous ra-

diation 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.

This appliance is classified as

a CLASS 1 LASER product.

The CLASS 1 LASER PROD-

UCT MARKING is located on

the rear exterior.

This caution

label is located

inside the unit.

SAFETY-RELATED COMPONENT WARNING !!

COMPONENTS IDENTIFIED BY MARK ! OR DOTTED 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.

PARTS No.

4-212-711-0π

4-212-712-0π

MODEL

AEP, UK model

SP, HK model

• Abbreviation

HK : Hong Kong model

SP : Singapore model

Parts No.

MODEL NO. HCD-SD1

MODEL IDENTIFICATION

– Specification Label –

– 3 –

TABLE OF CONTENTS

1. SERVICING NOTE .......................................................... 4

2. GENERAL .......................................................................... 7

3. DISASSEMBLY

3-1. Loading Panel ....................................................................... 8

3-2. Glass ASSY........................................................................... 8

3-3. Front Panel ........................................................................... 9

3-4. Main Board and Tuner Unit .................................................. 9

3-5. CD Mechanism Deck .......................................................... 10

3-6. Back Panel ......................................................................... 10

3-7. Disc Table .......................................................................... 11

3-8. Optical Pick-up ................................................................... 11

4. SERVICE MODE ............................................................. 12

5. TEST MODE ..................................................................... 13

6. ELECTRICAL ADJUSTMENTS ............................... 14

7. DIAGRAMS

7-1. Circuit Boards Location ...................................................... 16

7-2. Block Diagrams

• BD Section .......................................................................17

• Main Section .................................................................... 19

7-3. Schematic Diagram – BD Section – ................................... 23

7-4. Printed Wiring Board – BD Section –................................. 25

7-5. Schematic Diagram – Main (1/2) Section –........................ 27

7-6. Schematic Diagram – Main (2/2) Section – ........................ 29

7-7. Printed Wiring Board – Main Section – .............................. 31

7-8. Schematic Diagram – Sub Trans Section – ......................... 33

7-9. Printed Wiring Board – Sub Trans Section – ...................... 34

7-10. Schematic Diagram – Panel Section – ............................. 35

7-11. Printed Wiring Board – Panel Section –........................... 37

7-12. Schematic Diagram – AMP Section – .............................. 39

7-13. Printed Wiring Board – AMP Section – ........................... 41

7-14. Schematic Diagram – Connector Section –...................... 43

7-15. Printed Wiring Board – Connector Section – ...................45

7-16. Schematic Diagram – REG Section – .............................. 47

7-17. Printed Wiring Board – REG Section –............................ 49

7-18. IC Block Diagrams ........................................................... 51

7-19. IC Pin Functions ............................................................... 54

8. EXPLODED VIEWS

8-1. Front Panel Section ............................................................. 56

8-2. Chassis Section ................................................................... 57

8-3. Mechanism Deck Section (CDM13B-5BD19) ................... 58

8-4. Base Unit Section (BU-5BD19).......................................... 59

9. ELECTRICAL PARTS LIST ........................................ 60

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, ob-

serve from more than 30 cm away from the objective lens.

LASER DIODE AND FOCUS SEARCH OPERATION

CHECK

Carry out the “S curve check” in “CD section adjustment” and check

that the S curve waveform is output two times.

– 4 –

SECTION 1

SERVICING NOTE

OPENING THE DISC TRAY WHEN POWER IS OFF

1

Using a thin screwdriver, rotate the internal cam

in the arrow direction completely.

2

Open the glass door, and pull out the loading panel.

1

2

Pull up the glass door,

in the arrow direction.

4

Screw (PTP 2.6x6)

3

Bracket (shaft)

(Bottom side)

1

When securing this part, position at the

center to allow some play. Open and close

the glass window several times, and check

that the parts do not touch each other.

ATTACHING THE GLASS ASSEMBLY

• Attach according to steps 1 to 4.

– 5 –

POSITIONS FOR SERVICING THE CONNECTOR

BOARD, SUB-TRANS BOARD, CHEMI-CON BOARD,

AND AMP BOARD

1 Remove the four screws securing the upper cover, and remove

the upper cover.

2 Remove the loading panel. (Refer to SECTION 3 DISASSEM-

BLY.)

3 Remove the four screws A securing the MAIN board, five screws

B securing the rear panel, two flat cables (CN701, CN702),

and open the MAIN board as shown in the figure.

4 Remove the two screws C securing the heat sink, and remove

the AMP board and CHEMI-CON board.

5 Remove the two screws D securing the SUB-TRANS board

and four screws E securing the CONNECTOR board, and re-

move the SUB-TRANS board and CONNECTOR board.

6 Return the MAIN board to its original position.

7 Insulate these boards and the MAIN board with paper, etc., and

assemble the CONNECTOR board, SUB-TRANS board,

CHEMI-CON board, and AMP board on these boards.

Should be insulatable

with paper, etc.

A

C

D

B

E

Heat sink

SUB-TRANS board

AMP board

CHEMI-CON board

CONNECTOR board

MAIN boar

d

Flat type wire (CN701)

Flat type wire (CN702)

– 6 –

POSITION FOR SERVICING THE CD MECHANISM

DECK

1 Remove the four screws securing the upper cover, and remove

the upper cover.

2 Remove the loading panel. (Refer to SECTION 3 DISASSEM-

BLY.)

3 Remove the four screws A securing the MAIN board, five screws

B of the rear panel, and flat cables (CN701, CN702), and re-

move the MAIN board.

4 Remove the two screws D securing the SUB-TRANS board,

and remove the SUB-TRANS board.

5 Remove the two screws F securing the REG board.

6 Remove the three screws G securing the CDM cover, and re-

move the CDM cover.

7 Remove the two screws H securing the CDM, move the CDM

backwards by about 5 mm horizontally, and then lift upwards.

8 Rotate the CDM in the counterclockwise direction by about 30˚

to remove.

9 Return the MAIN and SUB-TRANS boards to their original

positions.

G

H

CDM cove

r

A

B

D

F

SUB-TRANS board

MAIN board

Flat type wire (CN702)

Flat type wire (CN701)

– 7 –

Location of Parts and Controls

1 1/u (Power) button

2 CD disc tray

3 § button

4 VOLUME dial

5 ±/)/TUNING + button

SECTION 2

GENERAL

Front Panel

15

12

13

11

14

78910

2

3

5

6

1

4

6 ≠/0/TUNING – button

7 π button

8 ﬂ button

9 TUNER/BAND button

10 FUNCTION button

11 DISPLAY button

12 PHONES jack

13 t indicator

14 u indicator

15 Display window

This section is extracted from

instruction manual.

– 8 –

SECTION 3

DISASSEMBLY

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

3-1. LOADING PANEL

3-2. GLASS ASSY

1 Turn ON the power, and press the EJECT button to open the

tray.

2 Remove the loading panel in the arrow direction.

3 Press the EJECT button to close the tray.

• If the power cannot be turned ON, refer to “Opening the Disc

Tray When the Power is OFF” of “Service Note”, and open the

tray.

Power button

Loading panel

Eject butto

n

1

Screw (PTP2.6x6)

2

Bracket (shaft)

3

4

(Bottom side)



– 9 –

3-3. FRONT PANEL

3-4. MAIN BOARD AND TUNER UNIT

1

Three screws

(BVTP3x8)

2

Three claws

4

Flat type wire (11core)

(CN702)

5

Flat type wire (13core)

(CN701)

6

Front panel

3

1

Four screws

(BVTP3x8)

2

Six screws

(BVTP3x8)

4

Flat type wire (19core)

(CN301)

6

Flat type wire

(19core) (CN705)

5

Connector (CN351)

8

Connector (CN706)

7

MAIN board and Tuner unit

3

– 10 –

3-6. BACK PANEL

3-5. CD MECHANISM DECK

1

Two screws

(BVTP3x8)

8

Two screws

(BVTP3x8)

5

REG board

2

Connector

(CN945)

4

Connector

(CN994)

3

Connector

(CN942)

9

CD mechanism deck

6

Three screws

(BVTP3x8)

7

Dust cove

r

1

Six screws

(BVTP3X8)

2

Four screws

(BVTT3X8)

3

Connector

(CN992)

5

Connector

(CN901)

7

Back panel

6

Connector

(CN551)

8

PC board block

4

Connector

(CN991)

– 11 –

3-7. DISC TABLE

3-8. OPTICAL PICK-UP

1

Screw (BV3x8)

2

Screw (BV3x8

)

3

Holder (MG) assembly

4

Pull out the disc table.

C

B

A

3

Flat type wire (16 core)

(CNU101)

1

Move the claw

in the arrow

A

direction.

2

Remove the sled shaft in the

arrow direction

B

.

4

Remove the optical pickup in the arrow direction

C

.

BD board

– 12 –

SECTION 4

SERVICE MODE

Key Check Mode for Complete Lighting of LED/Fluorescent Display Tube

• Perform this mode to analyze and check malfunctions such as display defects and when buttons do not work.

Procedure:

1. Press the 1/u button to turn on the power.

2. Press the DISPLAY button and ^ button together.

3. All LEDs and the fluorescent display tube will light up completely.

4. Pressing the FUNCTION button here will light the fluorescent display tube in the following order; Partial lighting 1 n Partial lighting

2 n Complete lighting n Partial lighting 1······

Turning the VOLUME dial will switch the lighting order of the LED.

To end without shifting to the key check mode, press the 1/u button to end.

5. Pressing the p button sets the key check mode.

6. During the key check mode, “KEY=0 JOG=0” will be displayed on the fluorescent display tube.

Pressing a button will increase the value of “KEY=”. However the value will not increase for buttons which have already been pressed

once.

Rotating the VOLUME knob in the clockwise direction increases the value of “JOG=” in the order of 1, 2, 3.... and rotating in the

counterclockwise direction decreases in order of 10, 9, and 8.

7. To end the check mode, press all buttons (8 buttons). “KEY-OK” will be displayed.

Then press any button, and disconnect the power cord from the outlet.

Checking the Sub-Clock

• Perform this mode to check clock operations.

Procedure:

1. Connect an oscilloscope and frequency counter between the pin (TP791) and ground of IC701 of the MAIN board.

2. Press the § and 1/u buttons together to display “91P = 32.768k” on the fluorescent display tube.

3. Check that the signal on the oscilloscope becomes a 32 kHz rectangular waveform and the reading of the frequency counter becomes

32.768 kHz.

4. Press the 1/u button to end.

Sled Servo Mode

• In this mode, the CD sled motor can be operated freely.

Execute it when cleaning the pick-up.

Round holes can be seen on the topmost board when the case is opened. Move the pick-up and clean off the dirt in these round holes using

a cotton swab.

Procedure:

1. Press the DISPLAY and § buttons with the power of the unit OFF.

2. When the sled servo is set, “MANUAL” is displayed on the fluorescent display tube.

3. Pressing the +/TUNING/) button when the CD is in the stop state moves the pick-up to the outer track. Pressing the =/

TUNING/0 button moves it to the inner track.

4. To end this mode, perform the following steps.

1) Move the If not, the disc cannot be removed.

2) Press the DISPLAY and § buttons together.

Note:

• When ending this mode, be sure to move the pick-up to the innermost circumference. If not, the disc cannot be removed.

• Do not move the sled motor more than required as this will damage the gears.

Round holes for cleaning

Initializing (Forced Reset)

• Perform this mode when resetting the unit or when returning the unit to the customer.

• The preset frequency of the tuner, etc. will be the settings at shipment.

Procedure:

While pressing the 1/u button, insert the power cord into the outlet.

– 13 –

SECTION 5

TEST MODE

AGING MODE

This unit is equipped with an aging mode.

Use this mode for analyzing defects and for checks after completing repairs.

After repairs, perform aging 100 times and check that the unit is normal.

The aging mode is executed in the following sequence.

The aging mode will continue as long as the unit is normal.

If the unit becomes abnormal, it will display the state and number of cycles, and operations will stop. (Refer to Table 1.)

Sequence of Aging Mode:

CD TOC OK?

NO

YES

OK?

NO

OK?

NO

YES

OK?

NO

OK?

NO

YES

NO

YES

OK

YES

NG

Start

Sets the CD function and reads the CD TOC.

Message 1

Message 2

Message 3

Message 4

Message 5

Message 6

Message 4

Pauses first song.

Last song search paused state

Starts last song playback

Is CD playing?

End playback?

Opens the CD tray

Closes the CD tray

Power OFF

Display of number of aging cycles

Power ON

Optical defect, spindle defect (including motor), cannot read

Q data, disc defect (scratches, etc.), bad focus, bad GFS, etc.

Disc defect (scratches, etc.), cannot read Q data, etc.

Optical defect, sled, tracking defect (including motor), cannot

read Q data, disc defect (scratches, etc.).

Optical defect, cannot read Q data, disc defect (scratches, etc.),

etc.

LOAD OUT SW defect

LOAD IN SW defect

No

Error Messages

Details of Error

1

2

3

4

5

6

CD No Disc NG

CD Pause NG

CD Search NG

CD Play NG

CD Open NG

CD Close NG

Cannot read CD TOC.

Cannot set CD pause in

CD synchro mode.

Cannot search last track on CD.

Cannot play last track on CD.

Cannot open CD tray.

Cannot close CD tray.

Main Causes

Procedure:

1. Press the DISPLAY button and =/TUNING/0 button together.

2. To end aging, press the u button and end.

Table-1 Messages and Main Reasons for Stop of Aging

– 14 –

Procedure:

1. Connect oscilloscope to test point TP (RF).

2. Turned Power switch on.

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

4. Adjust RV101 so that the waveform is clear.

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

clearly distinguished at the center of the waveform.)

5. After adjustment, check the RF signal level.

• RF signal

VOLT/DIV: 200 mV

TIME/DIV: 500 nS

S Curve Check

Procedure :

1. Connect oscilloscope to test point TP (FEO).

2. Connect between test point TP (FOK) and Ground by lead wire.

3. Turn Power switch on.

4. Put disc (YEDS-18) in and turned Power switch on again and

actuate the focus search. (actuate the focus search when disc

table is moving in and out.)

5. Check the oscilloscope waveform (S-curve) is symmetrical be-

tween A and B. And confirm peak to peak level within 2.4 ± 0.7

Vp-p.

S-curve waveform

6. After check, remove the lead wire connected in step 2.

Note: • Try to measure several times to make sure than the ratio of

A : B or B : A is more than 10 : 7.

• Take sweep time as long as possible and light up the bright-

ness to obtain best waveform.

RF Level Check

Procedure :

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

2. Turned Power switch on.

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

4. Confirm that oscilloscope waveform is clear and check RF sig-

nal level is correct or not.

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

clearly distinguished at the center of the waveform.

• RF signal

VOLT/DIV: 200 mV

TIME/DIV: 500 nS

CD SECTION

Note:

1. CD Block is basically designed 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 lens cleaning liquid

when the signal level is low than specified value with the fol-

lowing checks.

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

Focus Bias Adjustment

Perform this adjustment when the optical pick-up has been replaced

or repaired.

–

+

oscilloscope

BD (CD) board

TP (RF)

TP (VC)

level : 1.3

±

0.3 Vp-p

–

+

oscilloscope

BD (CD) board

TP (FEO)

TP (VC)

symmetry

A

B

within 2.4

±

0.7 Vp-p

–

+

oscilloscope

BD (CD) board

TP (RF)

TP (VC)

SECTION 6

ELECTRICAL ADJUSTMENTS

level : 1.3

±

0.3 Vp-p

– 15 –

Procedure :

1. Connect oscilloscpe to test point TP (TEO) on BD board.

2. Turn Power switch on.

3. Put disc (YEDS-18) in to play the number five track.

4. Press the “P (Pause)” button. (Becomes the 1 track jump mode)

5. Confirm that the oscilloscope waveform is symmetrical on the

top and bottom in relation to 0Vdc, and check this level.

1 track jump waveform

E-F Balance (1 Track Jump) Check

(Without remote commander)

Specified level: • x 100 = less than ± 7%

• A + B = 300 ± 100 mVp-p

Focus/Tracking Gain Adjustment (RV102, RV103)

This gain has a margin, so even if it is slightly off.

There is no problem.

Therfore, do not perform this adjustment.

Please note that it should be fixed to mechanical center position

when you moved and do not know original position.

A – B

2 (A + B)

Adjustment Location:

[BD (CD) BOARD] — Component Side —

–

+

oscilloscope

BD (CD) board

TP (TEO)

TP (VC)

A

B

0

V

LEVEL : 300

±

100 mVp-p

RF

RV101

(Focus Bias Adjust)

RV103

TEO

VC

FEO

RV102

TEI

FEI

FOK

IC101

IC104

GND

PCK

IC102

– 16 –

SECTION 7

DIAGRAMS

7-1. CIRCUIT BOARDS LOCATION

PANEL-SW board

MAIN board

TRANS board

SUB-TRANS board

BD board

LOADING board

PANEL board

REG board

AMP board

CHEMI-CON boar

d

CONNECTOR board

VOLUME board

HP board

HCD-SD1

– 17 –

– 18 –

7-2. BLOCK DIAGRAMS

– BD SECTION –

25

SLED MOTOR

DRIVE

26

•

27

16

M

SLO

M102

SLED MOTOR

4

SPINDLE MOTOR

DRIVE

1

•

2

M

M101

SPINDLE

MOTOR

SLED/SPINDLE

MOTOR DRIVE

IC102 (2/2)

14

SL+

SLED

SERVO

IC101 (2/2)

19

TRACKING

COIL DRIVE

18

17

T+

T–

9

FOCUS

COIL DRIVE

12

11

F–

F+

2-AXIS

DEVICE

TRACKING

COIL

FOCUS

COIL

TRACKING/FOCUS

COIL DRIVE

IC102 (1/2)

7

XRST

22

XRST

TRACKING/FOCUS SERVO,

RF AMP

IC101 (1/2)

PD1

PD2

35

36

4

2

1

5

10

6

F

E

38

39

E

A

B C

D

F

B+

K

A

D

C

B

DETECTOR

OPTICAL PICK-UP

(KSS-213B)

FEI

2

FEO

1

RV102

FOCUS

GAIN

TEO

42

TEI

44

RV103

TRACKING

GAIN

LD

33

PHD

34

LD DRIVE

Q101, 102

PD LD

LASER

DIODE

31

RFO

30

RFI

RF

14

23

C.OUT

CNIN

55

24

SENS

SEIN

54

FE BIAS

37

RV101

FOCUS

BIAS

+5V

6

FE-O

7

FE-M

12

TA-M

13

TAO

21

DATA

20

XLT

19

CLK

4

FGD

25

FOK

FOCUS SW

Q103

DATAO

56

XLTO

57

CLKO

59

MDP

3

FOK

1

XLON

64

09

PCMD

LRCK

DATA

2

LRCK

1

21

20

BCLK

322

LOUT

16

ROUT

13

A

MAIN

SECTION

(Page 19)

DIGITAL FILTER

D/A CONVERTER

IC104

DATA

51

XLAT

52

CLOK

53

SCOR

43

SQSO

46

SQCK

47

SENS

49

XRST

50

D OUT

39

DATA

26

MLAT

28

CLOK

27

A

MAIN

SECTION

D OUT

CD LOUT

CLK

DATA

XRST

SCOR

SENS

SQCK

SQSO

DF LAT

XLAT

FOCUS SW

5

DRIVE

6

M

M904 (CD)

LOADING

MOTOR

DRIVER

IC351

2

10

DRIVE

LOAD-OUT

LOAD-IN

OUT-SW

IN-SW

S292

(LOAD IN)

S291

(LOAD OUT)

A

MAIN

SECTION

DIGITAL SIGNAL PROCESSOR

IC103

XTAI

34

CKO

4

XTI

•

XTO

5 • 6

X101

22.5792 MHz

SPOD

63

S101

(LIMIT)

• SIGNAL PATH

: CD

: Digital out

HCD-SD1

– 19 –

– 20 –

– MAIN SECTION –

STBY+5.6V

90

65

66

67

20

21

22

99

98

69

76

39

38

37

36

4

15

8

28

35

5

6

7

82

83

84

85

86

87

88

100

38

37

36

35

22

4

2

16

43

45

52

53

60

63

49

50

61

62

57

58

59

RECTIFIER

D921,922

CDD+5V SW

Q942

RECTIFIER

Q951,953

ST 12V OUT

Q951,952

RECT

D971

SWITCH

Q103

DEFB SW

Q121

MUTE

Q141

RELAY SW

Q502,503

RELAY DRIVE

Q504

RELAY SW

Q501

FAN-DRIVE

Q551–553

SPEAKER

INPEDANCE

6-16Ω

SYSTEM

CONTROL

DIGITAL

OPTICAL

MUTE

Q505

MUTE

Q111

MUTE

Q112

MUTE SW

Q183

MUTE SW

Q182

MUTE SW

Q181

SWITCH

Q753

SWITCH

Q793

SWITCH

Q792

SWITCH

Q791

BUFFER

Q601

SIRCS

IC602

+

–

+

1

2

5

VOLUME

S691

TIMER:RED

ON:GREEN

STANDBY:RED

SWITCH

Q752

14

15

12

13

2

1

9 10 11

51

56

5 – 50

63 62 61 60

AC IN

AC OUTLET

CN904

T991

MAIN

TRANSFORMAER

T991

SUB

TRANSFORMER

±B

RECT

D941-944

A±7.5VREG

Q941, 946

RECT

D901-904

RECT

D961-964

VG SWITCH

Q966

VG SW

Q964

VF SW

Q962,963

BS

VF SWITCH

Q965

A±7.5VREG

ST12V

D±5V

M+7V

CDD+5V

10

9

8

3

+

–

16

27

25

18

3

5 7

1

2

PANEL SW

S699

31

81

75

56

55

51

26

25

19

18

14

13

11

10

73

72

70

64

8

SWITCH

Q943

TO IC701 VDD

1

RESET

Q751

RESET

IC951

15

2

3 1

68

FAN

L

R

J667

CN781

IC311

3

1

STBY+5.6V REG

IC901

3 1

DOUT

L-OUT

AM

ANTENNA

FM

75Ω

TUNER

UNIT

R-OUT R-CH

ST

TUN

MUT

DO

CL

DI

CE

R-CH

SIRCS

DAT

CLK

LAT

ST

TUN

DO

DI

CL

CE

MUT

TC-MUT

MD-MUT

MUTE2

SP RELAY SW

MUTE1

HPSW

I C.CLOCK

I C.DAT

HELP

KEY2

KEY1

INT

DATA

ENCODERB

ENCODERA

XT1

XT2

BD POWER

PANEL SW

RESET

AC CUT

LIGHT

X2

X1

TIMER LED

ON LED

STBY LED

ON/XSRBY

FLDISP SW

SDATA

SCLOCK

SLAT1

STEREO

TUNED

ST.MUTE

V/T

FL.RST

FL.LAT

FL.SLK

FL.DAT

RDS.CLK

IN

RDS.DAT

SCOR

CD

LOUT

SQSI

SCOR

SQCK

FSW

SENS

CD-CLK

CD-DATA

DF-LAT

DSP-LAT

BD.RESET

IN SW

OUT SW

LOAD IN

LOAD OUT

SQSO

SQCK

FOCUS SW

SENS

CLK

DAT

DF-LAT

XLAT

XRST

IN SW

OUT SW

LOAD IN

LOAD OUT

D OUT

ST.IDATA

ST.ODATA

ST.CLOCK

ST.LATCH

R-CH

BS

R-CH

STEREO

TUNED

MUTING

DO

CL

DI

CE

FM-DET-OUT

BUFFER

Q450

DISPLAY DRIVER

IC601

VF1

VF0

DAT

G12

CLK

CS

RST

–VG

VFL

J101

(1/2)

J102

(1/2)

SWITCH

IC102

FLUORESCENT INDICATOR TUBE

FL601

RDS DECODER

IC451

SOUND PROCESSOR

IC101(1/2)

SOUND PROCESSOR

IC101(2/2)

POWER AMP

IC801

TUNER

BS/CS

MD

CD

BASS/

TREBLE

AMP

• VOLUME

LAT

DAT

CLK

LATCH

DATA

CLOCK

R-CH

R-CH R-CH

R-CH

DBFB

AMP

R-CH

+8dB AMP

IC103

J101(2/2)

J102(2/2)

L

R

L

R

MD

OUT

TAPE

OUT

R-CH

D881

R-CH

DAT

HLP

CLK

R-CH

RY501

SPEAKER RELAY

RY901

STANDBY RELAY

76

23

LY

CLK

DAT

HLP

LX

SY

SX

VG

VF1

VF0

I C BUS

EXTENDER

IC791

2

X702

32KHz

X701

5MHz

STBY+5.6V

D752

D751

C759 BACK UP

+

D601-604

D605

t

u

D606

A

CD SECTION

(Page 18)

PHONES

MASTER CONTROL

IC701

KEY BOARD

SWITCH

S621-625,631-634

2

TMB11

D+5VREG

IC921

M+7VREG

IC922

D601

D602

D603

D604

)/±

0/≠

π

ﬂ

MD

IN

L

R

IN

L

R

IN

L

R

CS/BS

TAPE

UG REG

Q961

• R ch is same as L ch

• SIGNAL PATH

: FM

:BS/CS

: PB

: REC

: CD

: Digital out

: TAPE

20

21

X601

4.3 MHz

14

13

HCD-SD1

– 21 – – 22 –

THIS NOTE IS COMMON FOR PRINTED WIRING

BOARDS AND SCHEMATIC DIAGRAMS.

(In addition to this, the necessary note is printed

in each block.)

For schematic diagrams.

Note:

• 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 Ω and

1

/

4

W or less unless otherwise

specified.

•

¢

: internal component.

• 2 : nonflammable resistor.

• 1 : fusible resistor.

• C : panel designation.

For printed wiring boards.

Note:

• X : parts extracted from the component side

• p : parts mounted on the conductor side.

•

®

: Through hole.

•

¢

: internal component.

• b : Pattern from the side which enables seeing.

(The other layers' patterns are not indicated.)

• S : B+ Line.

• T : B– Line.

• H : adjustment for repair.

• Voltages and waveforms are dc with respect to ground in

service mode.

• Voltages are taken with a VOM (Input impedance 10 MΩ).

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

E : PB (MD)

m : PB (TAPE)

n : REC

J : CD

c : digital out

• Abbreviation

SP : Singapore model.

HK : Hong Kong model.

WAVEFORMS

– BD SECTION –

• Indication of transistor

Caution:

Pattern face side: Parts on the pattern face side seen from the

(Side B) pattern face are indicated.

Parts face side: Parts on the parts face side seen from the

(Side A) parts face are indicated.

C

These are omitted

EB

Q

C

These are omitted

EB

– MAIN SECTION –

1

IC701 !¡ (XI)

1

2

3

IC101 #¡ (RFO) (PLAY Mode)

500 mV/DIV, 500 ns/DIV

IC101 $¢ (TEI) (PLAY Mode)

50 mV/DIV, 1 µs/DIV

4

5

6

7

IC103 3 (MDP) (PLAY Mode)

IC103 @• (RFCK)

IC103 @™ (BCLK)

IC103 @∞ (XPCK)

Approx.

100 mVp-p

IC101 2 (FEI) (PLAY Mode)

50 mV/DIV, 1 µs/DIV

2.6 Vp-p

7.6 µs

5.1 Vp-p

136 µs

5 Vp-p

474 ns

5.1 Vp-p

22.8 µs

8

IC103 @º (LRCK)

9

IC104 6 (XTO)

4.6 Vp-p

16.9344 MHz

2

IC701 !¢ (XI)

2.6 Vp-p

32 kHz

4.3 Vp-p

5 MHz

1.3 ± 0.3 Vp-p

Approx.

150 mVp-p

5.3 Vp-p

14 ns

Note: The components identified by mark ! or dotted line

with mark ! are critical for safety.

Replace only with part number specified.

HCD-SD1

7-3. SCHEMATIC DIAGRAM – BD SECTION –

• See page 22 for Waveforms.

• See page 51 for IC Block Diagrams.

– 23 –

– 24 –

(Page 29)

Note on Schematic Diagram:

• Voltages and waveforms are dc with respect to ground

under no-signal (detuned) conditions.

no mark : Stop

( ) : CD (PLAY)

* : Can not be measured.

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