IC152 BH6511FS-E2, BD MD Board 2/2 IC121 CXD2654R | Sony HCD-MD373

IC152 BH6511FS-E2

CAPA–

CAPA+

IN2R

IN2F

VM2

OUT2F

PGND2

OUT2R

VM12

OUT1R

PGND1

OUT1F

VM1

IN1F

IN1R

VDD

32

31

30

29

28

27

26

25

24

23

22

21

20

19

18

17

INTERFACE

AMP

AMP

AMP

AMP

INTERFACE

VDD

CHARGE

PREDRIVE

PREDRIVE

PUMP.

OSC

PREDRIVE

PREDRIVE

INTERFACE

AMP

AMP

AMP

AMP

INTERFACE

PSB

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

GND

VG

IN4R

IN4F

VM4

OUT4F

PGND4

OUT4R

VM34

OUT3R

PGND3

OUT3F

VM3

IN3F

IN3R

PSB

• BD (MD) Board (2/2)

IC121 CXD2654R

APCREF

EFMO

DVSS

TEST3

TEST2

TEST1

TEST0

SPFD

SPRD

SFDR

SRDR

FS4

FRDR

FFDR

DVDD

TFDR

TRDR

LDDR

DTRF

CKRF

XLRF

F0CNT

ADFG

APC

DCHG

100

99

98

97

96

95

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93

92

91

90

89

88

87

86

85

84

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76

SPINDLE

PWM

AUTO SEQUENCER

MNT0

1

SERVO

GENERATOR

75

TE

74

SE

MNT1

2

MONITOR

EACH

73

AVSS

MNT2

3

CONTROL

BLOCK

MNT3

4

ADIP

72

ADRB

71

ADRT

DEMODULATOR/

70

AVDD

SWDT

5

DECODER

69

ADIO

SCLK

6

XLAT

7

CPU I/F

EACH

68

VC

SRDT

8

BLOCK

SERVO

A/D

67

AUX1

DSP

CONVERTER

SENS

9

ANALOG

66 FE

XRST

10

MUX

65

ABCD

APC

64

BOTM

SQSY

11

SUBCODE

63

PEAK

DQSY

12

PROCESSOR

RECP

13

62

CLTV

61

FILO

PLL

60

FILI

EFM/ACIRC ENCODER/

DECODER

59 PCO

XINT

14

SHOCK RESISTANT

MEMORY CONTROLLER

TX

15

58 AVSS

16

OSCI

CLOCK

EACH

OSCO

17

GENERATOR

BLOCK

XTSL

18

57

RFI

DIGITAL

SAMPLING

COMP

DIN0

19

56

BIAS

AUDIO

RATE

DIN1

20

55

AVDD

I/F

CONVERTER

54

ASYI

DOUT

21

53 ASYO

DATAI

22

ATRAC

DRAM

LRCKI

23

ENCODER/DECODER

XBCKI

24

ADDT

25

52 MVCI

ADDRESS/DATA BUS A00 - A11, D0 - D3

51

D3

26

27

28

29

30

31

32

33 34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

DADT

LRCK

XBCK

FS256

DVDD

A03

A02

A01 A00

A10

A04

A05

A06

A07

A08

A11

DVSS

XOE

XCAS

A09

XRAS

XWE

D1

D0

D2

66

Image 66

Sony HCD-MD373 service manual IC152 BH6511FS-E2, BD MD Board 2/2 IC121 CXD2654R

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.

Contents

Specifications 928-998-12 SELF-DIAGNOSIS Function Items of Error History Mode Items and Contents Flexible Circuit Board Repairing AEP, UKHK, SP, MY, AR, AUS, KR, JE Diagrams Table of ContentsDisassembly Exploded Views Section Servicing Note Drawing OUT the Tray During Power OFFCleaning the Optical Pickup CD Player Removing the Indication Plate FL Service Position the Power Board LED and Fluorescent Indicator Tube All Lit, Key Check Mode Cold ResetHot Reset Change-over of AM tuner Step between 9kHz and 10kHz Aging Mode Error History Display Mode Reading the Mechanism Error History Display Reading the BD Error History Display JIG for Checking BD MD Board Waveform IOPTEO Record Precedure REC/PLAY Checks Prior to Parts Replacement and AdjustmentsForced Reset Main Board Component Side Retry Cause Display Mode Tuning +/MD/CD/TUNING + Hexadecimal nBinary Conversion Table Section General Location of Parts and ControlsFront Panel Page Page Section Disassembly Case Front Panel Back Panel Main Board and Power Transformer CD Mechanism Deck TRAY, Gear and CAM CD Base UnitOptical PICK-UP Section of CD KSS-213BA/F-NP BD CD BOARD, Spindle Motor M101 and Sled Motor M102 MD Mechanism Deck Set the shaft of Cam gear to Over Write Head Optical PICK-UP of MD KMS-260B/J1N Spindle Motor M901 and Sled Motor M902 MD Setting the Test Mode Section Test ModePrecautions for USE of Test Mode Exiting the Test Mode Selecting the Test Mode Display Contents Mark Group MID Operating the Continuous Playback ModeNon-Volatile Memory Mode EEP Mode OUT Test Mode Displays Functions of Other Buttons Meanings of Other Displays Section Electrical Adjustments MD Section Parts Replacement and Adjustment Precautions for Adjustments Precautions for Checking Laser Diode EmissinonPrecautions for USE of Optical PICK- UP KMS-260B Creating Continuously Recorded Disc Checks Prior to Repairs Temperature Compensation Offset CheckLaser Power Check Specified Value Focus Bias Check Play Checking MO Error Rate CheckCD Error Rate Check Self-Recording/playback Check Laser Power Adjustment Initial Setting of Adjustment ValueTemperature Compensation Offset Adjutment Recording and Displaying the IOP Information Traverse Adjustment Check Focus Bias Adjustment Press the ENTER/YES R button, display EFB = CD Auto Gain Control Output Level Adjustment Error Rate CheckAuto Gain Control Output Level Adjustment MO Auto Gain Control Output Level Adjustment Curve Check Adjusting Points and Connecting PointsCD Section RF Level Check HCD-MD373 Section Diagrams Circuit Boards Location Block Diagrams BD CD Section HCD-MD373 BD MD /2 REC D/A Converter Main Section BD CD Section BD MD 2/2 Section Waveforms BD CD SectionBD MD 1/2 Section Main 3/3 Section Printed Wiring Board BD CD Section See page 40 for Circuit Boards LocationMain Board Schematic Diagram BD CD Section Printed Wiring Board BD MD Section Semiconductor Location Schematic 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 Diagrams HCD-MD373 HCD-MD373 Schematic Diagram MD Digital Section See page 45 for Waveforms See page 67 for IC Block Diagrams Printed 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 Printed Wiring Board Power Section AEP, UKExcept AEP, UK Voltage Selector Schematic Diagram Loading Section Schematic Diagram BD Switch SectionPrinted Wiring Board BD Switch Section Printed Wiring Board Loading Section IC Block Diagrams BD MD Board 1/2 IC101 CXA2523AR IC152 BH6511FS-E2 BD MD Board 2/2 IC121 CXD2654R BD CD Board IC101 CXD2587Q C103 CXA2568M-T6 MD Digital BoardIC153 LB1830M-S-TE-L Main Board 3/3 IC171 LB1641 Main Board 1/3 IC302 MC14052BMain Board 2/3 IC301 M62428AFP IC931 M62016L IC101 Digital Signal Processor CXD2587Q Bdcd board IC PIN Functions AVSS0 RfdcAdio Igen IC101 RF Amplifier CXA2523AR Bdmd board MNT2 Xbusy MNT0 FOKMNT1 Shck MNT3 Sloc RFI MvciAvdd Avss Spfd FS4Sprd Fgin IC501 Master Control M30620ECFP-A21 Main board Tuned CD-RESETStereo ST-CE Section Exploded Views Case and Front Panel Section Chassis Section 59 #3 MD Mechanism Deck MDM-5A 113 110 107125 126 106 105 MD Base Unit MBU-5A CD Mechanism Deck CDM55A-5SBD32 252 254 CD Base Unit BU-5SBD32255 256 257 253 254 258 251 CD Mechanism Deck CDM55C-5BD32 352 354 CD Base Unit BU-5BD32355 356 357 353 354 358 351 Section Electrical Parts List AMP AMP BD CD BD CD BD MD 2SJ278MYTR BD MD MD DigitalInductor Chip 2SK1764KYTR Resistor MD Digital Loading Main Main Terminal BOARD, Ground Ground TerminalEP1 EP2 Description Remark R402 249-417-11 Panel BOARD, Complete Indicator TUBE, FluorescentPanel Jack LINE-IN Panel Power PIN, Connector 7P Switch Voltage SelestorTRANSFORMER, SUB Power SWITCH, Push 1 KEY Hardware List SCREW,PRECISION +PScrew +B Memo HCD-MD373 Revision History