Sony HCD-MD373 service manual Main Section, BD CD Section

Page 44

HCD-MD373

– MAIN SECTION –

MUTE SW

MUTE SW

Q551

Q841

 

11

 

1 POWER AMP 10

 

IC801

+B

RY881

+

 

 

TUNER UNIT

 

 

 

 

 

ANTENNA

 

 

 

 

 

 

 

 

STEREO

50

 

 

 

 

 

51

 

 

 

AM

 

TUNED

 

 

 

 

 

 

 

 

 

 

54

 

 

 

 

 

 

DO

 

 

 

FM 75 Ω

 

 

53

 

 

 

 

 

DI

 

 

 

 

 

 

 

 

 

 

 

 

55

 

 

 

FM 300 Ω

 

CLK

 

 

 

 

52

 

 

 

 

 

 

CE

 

 

 

 

 

 

49

 

 

 

 

 

MUTE

 

 

 

 

 

 

 

 

 

 

 

 

RDS

 

 

 

 

 

 

 

R-CH

 

R-CH

 

 

 

 

 

 

 

 

 

J101

L

 

 

 

 

 

 

TAPE

 

 

 

 

 

 

B

 

 

 

 

IC302

 

INPUT

R-CH

 

 

 

 

 

R

 

 

INPUT SELECTOR

J602

 

 

 

12

SELECT

13

 

R-CH

 

 

SWITCH

 

LINE

 

 

14

 

 

 

 

 

B

 

IN

 

 

 

 

 

 

 

 

 

 

10

9

6

 

 

 

 

 

MUTE CONTROL

MUTE SW

 

 

 

Q552

Q801

 

 

 

AEP, UK

 

 

 

 

 

RDS DECODER

 

 

 

IC401

 

 

BUFFER

4 MUX

X1 13

 

X401

Q401

 

 

 

 

 

 

 

4.332 MHz

 

 

X0 14

 

 

RDATA RCLK

 

 

 

2

16

 

 

 

 

 

L

J101

 

 

 

TAPE

 

 

 

A

 

 

 

OUTPUT

 

 

 

 

 

 

DBFB SW

DBFB DET

 

 

 

 

 

 

Q301

 

D881

 

 

 

 

 

 

 

PROTECT SW

OVER LOAD DET

 

 

 

 

 

 

Q872–873

Q802, 871

 

 

 

 

 

 

 

 

M103

 

 

 

 

 

 

 

 

LOADING

 

 

 

 

 

 

 

 

MOTOR

 

 

 

 

 

 

BD (CD) SECTION

 

M

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Page 41)

 

2

10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IC171

 

 

 

 

 

 

 

 

 

MOTOR

DRIVE

 

 

 

 

 

 

 

DRIVE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

5

05 15 45 35 55 25 94

 

 

 

 

 

95 23 65 18 85 28 91 33 75

 

 

 

50 51 54 53 55 52 49

6

1

3

21 20

27

59 32 56 81 58 82 19 33 57

71 70 67 66

STEREO TUNED ST-DIN ST-DOUT ST-CLK ST-CE ST-MUTE

TA-MUTE

STKPOWER

F-RY

RQS-DATA RDS-INT

PROTECT-IN

CD-RESET SQ-DATA-IN SENS CD DATA CD-LAT CD CLK SCOR SQ-CLK HOLD

OPEN-SW IN-SW LOAD-IN

LOAD-OUT

 

 

 

 

 

 

IC501

 

 

 

 

 

 

 

 

 

MASTER CONTROL

 

 

 

R-CH

RELAY DRIVE

Q881

SIRCS

IC602

 

 

 

D602–609

 

VOLUME

 

 

 

 

 

ROTARY

 

 

 

 

 

ENCODER

 

 

 

LED DRIVE

S601

 

S602–616

Q607–610

86 87

88 93

89

91

72

79

VOL A VOL B

SIRCS HEADPHONE

KEY 0

KEY 1 KEY 2

LED LED

STANDBY

–

–

R-CH +

R-CH

L

TM881

SPEAKER

R

J601

PHONES

BD (CD) SECTION

BASS

26

 

(Page 41)

39

TU

 

 

 

TC

 

 

 

 

38

CD

SELECT

CD-L

37

MD

SWITCH

D-OUT

36

 

 

 

 

 

 

 

 

MICON

 

 

 

INTERFACE

 

 

TAL

 

ATA D

KLC

 

 

20

21

22

I2C-SCL

 

 

 

 

 

I2C-SDA

 

 

 

 

 

35

25

R-CH

IC301

DIGITAL SOUND

CONTROLLER

MUTE SW

R-CH

R

Q101

 

 

REC OUT MUTE

 

 

Q102

 

 

IC601

DISPLAY DRIVER

VF

1

DIG11

RST 13

 

 

 

 

11

DIG1

CS 14

 

 

.

.

SCK 15

 

 

62

DIG14

 

FLUORESCENT

64

DIG12 SDATA 16

 

INDICATOR

24

SEG34

DIG0 12

BUFFER

TUBE

Q601

FL601

31

SEG27

 

 

 

 

.

.

 

 

 

33

SEG26

 

 

MD-REC-L I2C-SDA I2C-SDL

REC OUT CONT

62LAT 62DATA 62CLK FUNC-SEL1 OPT-SEL

FL-RESET FL-CHIP SELECT FL-CLK FL-DATA

POWER-ON

CD-POWER

MD-RESET AC-CUT

RESET

FL-ON

94 30 29

83

38 47 48 45 46

34 36 37 35

43

5

28 22

12

42

VF

VF

XOUT

XIN

SUBXIN

SUBXOUT

13

15

10

11

 

X501

 

X502

 

16MHz

32.768kHz

 

 

 

T900

 

 

 

POWER

 

 

 

TRANSFORMER

 

VF SW

 

 

Q972, 973

 

 

VOLTAGE SELECTOR S991

AC IN

RY901

 

MD-LEVEL L

 

MD-REC-L

 

MD-L

 

DIG-IN

BD (MD)

RESET

SECTION (2/2)

P.DOWN

(Page 43)

 

12

13

11

10

9

 

IC121

 

 

 

8

 

 

 

 

 

OPTICAL

 

 

 

 

 

DIGITAL

1

 

 

 

6

IN

2

 

 

 

 

 

 

 

 

 

3

4

5

 

 

IC131

 

 

 

 

59 SEG0

DIG15

61

BUFFER

VF

 

 

Q602

MD-RESET

Q932

SWITCH

Q501

VP (–30V)

B.UP +3.3V

BT921

BACKUP

BATTERY

D945

SWITCH

Q974

–30V REG

Q971, D979–980

CHARGER

Q921

AC ON RESET

Q941

D987 D986

SWITCH

Q975

+5V REG

3

IC921

1

2

D921

AC OFF DETECTOR

IC941, D941–943

RECTIFIER

D975–978

RECTIFIER

D971–974

RECTIFIER

D992–993

RELAY DRIVER

Q991

DIGITAL INPUT

SELECTOR

D944S101

RESET

+B

T901

SUB

TRANSFORMER

RECTIFIER

•SIGNAL PATH

:FM

:PB (TAPE)

:REC (TAPE)

:CD

:CD (Digital out)

:PB (MD)

:REC (MD)

:PB (Digital out)

:REC (Digital in)

 

 

ST+12V

 

 

–B

 

A+7.5V

3

+7V REG

1

3

+12V REG

1

IC902

IC901

 

 

 

 

 

 

 

2

 

 

 

 

 

 

D101

 

 

 

 

DIG+5V

 

 

 

3

+5V REG

1

 

 

 

IC913

 

 

A+3.3V

 

 

 

 

 

 

D912

 

 

 

 

 

 

 

 

 

 

SYS+3.3V

 

D913

 

 

 

 

MD RESET

 

+3.3V REG

 

RESET SWITCH

3

5

3

1

Q931

IC931

IC912

 

 

D914

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

 

 

 

D911

 

 

 

A+5V

 

 

 

 

CD+5V

 

SWITCH

 

3

+5V REG

1

 

Q911

 

IC911

 

 

 

 

 

SWITCH

 

MOTOR

3

+7V REG

1

Q912

 

+7V

IC903

 

 

 

D832

RECTIFIER

D982–985

RECTIFIER

D981

4444

Page 43 Page 45
Image 44
Page 43 Page 45
Contents Specifications 928-998-12SELF-DIAGNOSIS Function Items of Error History Mode Items and Contents HK, SP, MY, AR, AUS, KR, JE Flexible Circuit Board RepairingAEP, UK Table of Contents DisassemblyDiagrams Exploded ViewsDrawing OUT the Tray During Power OFF Cleaning the Optical Pickup CD PlayerSection Servicing Note Removing the Indication Plate FLService Position the Power Board Cold Reset Hot ResetLED and Fluorescent Indicator Tube All Lit, Key Check Mode Change-over of AM tuner Step between 9kHz and 10kHzAging Mode Error History Display ModeReading the Mechanism Error History Display Reading the BD Error History DisplayTEO JIG for Checking BD MD Board WaveformIOP Record Precedure Checks Prior to Parts Replacement and Adjustments Forced ResetREC/PLAY Main Board Component SideRetry Cause Display Mode Tuning +/MD/CD/TUNING +Hexadecimal nBinary Conversion Table Front Panel Section GeneralLocation of Parts and Controls Page Page Section Disassembly CaseFront Panel Back PanelMain Board and Power Transformer CD Mechanism DeckOptical PICK-UP Section of CD KSS-213BA/F-NP TRAY, Gear and CAMCD Base Unit BD CD BOARD, Spindle Motor M101 and Sled Motor M102 MD Mechanism DeckSet the shaft of Cam gear to Over Write Head Optical PICK-UP of MD KMS-260B/J1N Spindle Motor M901 and Sled Motor M902 MDSection Test Mode Precautions for USE of Test ModeSetting the Test Mode Exiting the Test ModeSelecting the Test Mode Display Contents Mark GroupOperating the Continuous Playback Mode Non-Volatile Memory Mode EEP ModeMID OUTTest Mode Displays Functions of Other ButtonsMeanings of Other Displays Section Electrical Adjustments MD Section Parts Replacement and AdjustmentPrecautions for Checking Laser Diode Emissinon Precautions for USE of Optical PICK- UP KMS-260BPrecautions for Adjustments Creating Continuously Recorded DiscTemperature Compensation Offset Check Laser Power CheckChecks Prior to Repairs Specified ValuePlay Checking MO Error Rate Check CD Error Rate CheckFocus Bias Check Self-Recording/playback CheckInitial Setting of Adjustment Value Temperature Compensation Offset AdjutmentLaser Power Adjustment Recording and Displaying the IOP InformationTraverse Adjustment CheckFocus Bias Adjustment Press the ENTER/YES R button, display EFB =Error Rate Check Auto Gain Control Output Level AdjustmentCD Auto Gain Control Output Level Adjustment MO Auto Gain Control Output Level AdjustmentAdjusting Points and Connecting Points CD SectionCurve Check RF Level CheckHCD-MD373 Section Diagrams Circuit Boards LocationBlock Diagrams BD CD Section HCD-MD373BD MD /2 RECD/A Converter Main Section BD CD SectionWaveforms BD CD Section BD MD 1/2 SectionBD MD 2/2 Section Main 3/3 SectionMain Board Printed Wiring Board BD CD SectionSee page 40 for Circuit Boards Location Schematic Diagram BD CD Section Printed Wiring Board BD MD Section Semiconductor LocationSchematic Diagram BD MD /2 MD Digital Board Schematic Diagram SP Section Printed Wiring Board SP Section Printed Wiring Board Main Section Schematic Diagram Main /3 See page 68 for IC Block DiagramsHCD-MD373 HCD-MD373 Schematic Diagram MD Digital Section See page 45 for Waveforms See page 67 for IC Block DiagramsPrinted Wiring Board MD Digital Section Schematic Diagram AMP Section Printed Wiring Board AMP Section Schematic Diagram Panel Section Printed Wiring Board Panel Section Schematic Diagram Power Section Except AEP, UK Voltage Selector Printed Wiring Board Power SectionAEP, UK Schematic Diagram BD Switch Section Printed Wiring Board BD Switch SectionSchematic Diagram Loading Section Printed Wiring Board Loading SectionIC Block Diagrams BD MD Board 1/2 IC101 CXA2523ARIC152 BH6511FS-E2 BD MD Board 2/2 IC121 CXD2654RIC153 LB1830M-S-TE-L BD CD Board IC101 CXD2587QC103 CXA2568M-T6 MD Digital Board Main Board 2/3 IC301 M62428AFP IC931 M62016L Main Board 3/3 IC171 LB1641Main Board 1/3 IC302 MC14052B IC101 Digital Signal Processor CXD2587Q Bdcd board IC PIN FunctionsRfdc AdioAVSS0 IgenIC101 RF Amplifier CXA2523AR Bdmd board MNT0 FOK MNT1 ShckMNT2 Xbusy MNT3 SlocMvci AvddRFI AvssFS4 SprdSpfd FginIC501 Master Control M30620ECFP-A21 Main board CD-RESET StereoTuned ST-CESection Exploded Views Case and Front Panel SectionChassis Section 59 #3125 126 106 105 MD Mechanism Deck MDM-5A113 110 107 MD Base Unit MBU-5A CD Mechanism Deck CDM55A-5SBD32 CD Base Unit BU-5SBD32 255 256 257 253 254252 254 258 251CD Mechanism Deck CDM55C-5BD32 CD Base Unit BU-5BD32 355 356 357 353 354352 354 358 351Section Electrical Parts List AMP AMP BD CD BD CD BD MD BD MD MD Digital Inductor Chip2SJ278MYTR 2SK1764KYTR ResistorMD Digital Loading Main Main Ground Terminal EP1Terminal BOARD, Ground EP2Description Remark R402 249-417-11 Indicator TUBE, Fluorescent PanelPanel BOARD, Complete Jack LINE-INPanel Power Switch Voltage Selestor TRANSFORMER, SUB PowerPIN, Connector 7P SWITCH, Push 1 KEYScrew +B Hardware ListSCREW,PRECISION +P Memo HCD-MD373 Revision History

HCD-MD373 specifications

The Sony HCD-MD373 is a compact mini audio system that offers an impressive blend of sound quality, versatility, and advanced technology, making it an ideal choice for audio enthusiasts and casual listeners alike. One of the standout features of the HCD-MD373 is its MiniDisc recorder/player, a legacy technology that allows users to record high-quality audio onto MiniDiscs, providing an alternative to traditional CDs and cassettes. This feature is particularly appealing for those looking to capture live music or create personalized playlists.

Another notable aspect of the HCD-MD373 is its integrated CD player, which supports a variety of formats including CD, CD-R, and CD-RW. This versatility means that users can enjoy their favorite albums without the hassle of switching devices. The audio system also includes a built-in AM/FM tuner, enabling users to easily tune into their favorite radio stations and enjoy live broadcasts.

The HCD-MD373 is equipped with a powerful amplifier that delivers impressive sound output, complemented by its two-way speaker system. The speakers provide a rich audio experience with clear highs and deep lows, making it suitable for various music genres, from classical to contemporary. The system also features a bass boost function that enhances low-frequency sounds, allowing for a more immersive listening experience.

In terms of connectivity, the HCD-MD373 offers multiple inputs and outputs, including audio line-in, headphone jacks, and a digital optical output. These features make it easy to connect external devices such as MP3 players, smartphones, or even home theater systems. Additionally, the audio system supports various playback options, including shuffle and repeat modes, providing enhanced flexibility for users.

The design of the HCD-MD373 is sleek and modern, with a compact form factor that allows it to fit seamlessly into any living space. Its user-friendly interface, complete with an LCD display, makes it easy to navigate and control playback settings. Overall, the Sony HCD-MD373 is a testament to Sony's commitment to quality audio experiences, combining innovative features, robust technology, and elegant design into a single, powerful audio system. Whether enjoying a quiet evening at home or hosting a gathering with friends, the HCD-MD373 is sure to deliver satisfying sound and performance.
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