BD CD Board IC101 CXD2587Q, IC153 LB1830M-S-TE-L | Sony HCD-MD373

• BD (CD) Board

IC101 CXD2587Q

DOUT

VDD

VSS

AVDD3

PCO

FILI

FILO CLTV

AVSS3

RFAC

BIAS ASYI ASYO

AVDD0

IGEN

AVSS0

ADIO

RFDC

CE TE

60

59 58 57

56 55 54 53

52

51 50 49 48

47

46

45

44

43 42 41

DIGITAL

ERROR

DIGITAL

ASYMMETRY

40

SE

BUS

39

FE

OUT

CORRECTOR

PLL

CORRECTION

38

VC

INTERNAL

16K

LRCK

61

D/A

RAM

EFM

OPERATIONAL

PCMD

62

AMPLIFIER

INTERFACE

DEMODULATOR

ANALOG SWITCH

BCK

63

A/D

EMPH

64

CONVERTER

XVDD

65

CLOCK

37

XTSL

XTAI

66

TIMING

GENERATOR

36

TES1

XTAO

67

LOGIC

35

TEST

XVSS

68

SERVO DSP

PWM GENERATOR

34

VSS

AVDD1

69

FOCUS

FOCUS PWM

33

FRDR

AOUT1

70

SERVO

GENERATOR

32

FFDR

AIN1

71

SUBCODE

TRACKING

TRACKING

31

TRDR

PROCESSOR

SERVO

PWM GENERATOR

30

TFDR

LOUT1

72

PWM

PWM

SLED

SLED PWM

29

SRDR

AVSS1

73

SERVO

GENERATOR

28

SFDR

AVSS2

74

3rd ORDER

27

SSTP

LOUT2

75

NOISE SHAPER

SERVO

DIGITAL

26

MDP

INTERFACE

CLV

25

LOCK

AIN2

76

OVER SAMPLING

AOUT2

77

24

FOK

DIGITAL FILTER

SERVO AUTO

MIRR, DFCT,

AVDD2

78

FOK

23

DFCT

RMUT

79

SERIAL IN

SEQUENCER

DETECTOR

22

MIRR

LMUT

80

INTERFACE

21

COUT

CPU

INTERFACE

1

2

3

4

5

6

7

8

9

10 11

12 13 14

15 16 17 18

19 20

SQSO

SQCK

XRST

SYSM

DATA

XLAT

CLOK

SENS

SCLK

VDD

ATSK

SPOA SPOB XLON

WFCK

XUGF

XPCK

GFS

C2PO SCOR

C103 CXA2568M-T6

• MD DIGITAL Board

APC PD AMP

VCC

24 VCC

IC153 LB1830M-S-TE-L

VCC

23 LC/PD

VEE

22 LD_ON

IN2

IN1

VM

VREF

VCONT

10

9

8

7

6

HOLD

1

AGCVTH

VEE

VREF

2

VREF

APC LD AMP

LD

3

21 HOLD_SW

		VC	VCC	20 AGCCONT		LOGIC
		VC	VCC		(50%/30%	PREDRIVER
					OFF)	PREDRIVER
PD	4				OFF)
PD	4			19 RF_BOT
				19 RF_BOT
A	5		VC
A	5
B	6	VEE		18	RFTC
		RF SUMMING AMP	RF_EQ_AMP	18	RFTC
		RF SUMMING AMP	RF_EQ_AMP	17	RF_1
C	7	VC	VC	17	RF_1
C	7	VC	VC	16	RFO
D	8			15	RFE	1	2	3	4	5
						1	2	3	4	5
			ERROR AMP			VCC	OUT2	GND	OUT1	VS
		VC	ERROR AMP
			FOCUS
VEE	9		FOCUS
VEE	9	VEE		14	FE
				14	FE
		VC
F	10	VC
F	10
E	11
		VC		13 TE
		VC	TRACKING
		VC	TRACKING
		VC	ERROR AMP
		VC BUFFER	ERROR AMP
VC	12	VCC	VC
		VEE
		VC

67

Image 67

Sony HCD-MD373 service manual BD CD Board IC101 CXD2587Q, C103 CXA2568M-T6 MD Digital Board, IC153 LB1830M-S-TE-L

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

928-998-12 Specifications SELF-DIAGNOSIS Function Items of Error History Mode Items and Contents AEP, UK Flexible Circuit Board RepairingHK, SP, MY, AR, AUS, KR, JE Exploded Views Table of ContentsDisassembly Diagrams Removing the Indication Plate FL Drawing OUT the Tray During Power OFFCleaning the Optical Pickup CD Player Section Servicing Note Service Position the Power Board Change-over of AM tuner Step between 9kHz and 10kHz Cold ResetHot Reset LED and Fluorescent Indicator Tube All Lit, Key Check Mode Error History Display Mode Aging Mode Reading the BD Error History Display Reading the Mechanism Error History Display IOP JIG for Checking BD MD Board WaveformTEO Record Precedure Main Board Component Side Checks Prior to Parts Replacement and AdjustmentsForced Reset REC/PLAY Tuning +/MD/CD/TUNING + Retry Cause Display Mode Hexadecimal nBinary Conversion Table Location of Parts and Controls Section GeneralFront Panel Page Page Case Section Disassembly Back Panel Front Panel CD Mechanism Deck Main Board and Power Transformer CD Base Unit TRAY, Gear and CAMOptical PICK-UP Section of CD KSS-213BA/F-NP MD Mechanism Deck BD CD BOARD, Spindle Motor M101 and Sled Motor M102 Set the shaft of Cam gear to Spindle Motor M901 and Sled Motor M902 MD Over Write Head Optical PICK-UP of MD KMS-260B/J1N Exiting the Test Mode Section Test ModePrecautions for USE of Test Mode Setting the Test Mode Display Contents Mark Group Selecting the Test Mode OUT Operating the Continuous Playback ModeNon-Volatile Memory Mode EEP Mode MID Functions of Other Buttons Test Mode Displays Meanings of Other Displays MD Section Parts Replacement and Adjustment Section Electrical Adjustments Creating Continuously Recorded Disc Precautions for Checking Laser Diode EmissinonPrecautions for USE of Optical PICK- UP KMS-260B Precautions for Adjustments Specified Value Temperature Compensation Offset CheckLaser Power Check Checks Prior to Repairs Self-Recording/playback Check Play Checking MO Error Rate CheckCD Error Rate Check Focus Bias Check Recording and Displaying the IOP Information Initial Setting of Adjustment ValueTemperature Compensation Offset Adjutment Laser Power Adjustment Check Traverse Adjustment Press the ENTER/YES R button, display EFB = Focus Bias Adjustment MO Auto Gain Control Output Level Adjustment Error Rate CheckAuto Gain Control Output Level Adjustment CD Auto Gain Control Output Level Adjustment RF Level Check Adjusting Points and Connecting PointsCD Section Curve Check Circuit Boards Location HCD-MD373 Section Diagrams HCD-MD373 Block Diagrams BD CD Section REC BD MD /2 D/A Converter BD CD Section Main Section Main 3/3 Section Waveforms BD CD SectionBD MD 1/2 Section BD MD 2/2 Section See page 40 for Circuit Boards Location Printed Wiring Board BD CD SectionMain Board Schematic Diagram BD CD Section Semiconductor Location Printed Wiring Board BD MD Section Schematic Diagram BD MD /2 MD Digital Board Schematic Diagram SP Section Printed Wiring Board SP Section Printed Wiring Board Main Section See page 68 for IC Block Diagrams Schematic Diagram Main /3 HCD-MD373 HCD-MD373 See page 45 for Waveforms See page 67 for IC Block Diagrams Schematic Diagram MD Digital Section 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 AEP, UK Printed Wiring Board Power SectionExcept AEP, UK Voltage Selector Printed Wiring Board Loading Section Schematic Diagram BD Switch SectionPrinted Wiring Board BD Switch Section Schematic Diagram Loading Section BD MD Board 1/2 IC101 CXA2523AR IC Block Diagrams BD MD Board 2/2 IC121 CXD2654R IC152 BH6511FS-E2 C103 CXA2568M-T6 MD Digital Board BD CD Board IC101 CXD2587QIC153 LB1830M-S-TE-L Main Board 1/3 IC302 MC14052B Main Board 3/3 IC171 LB1641Main Board 2/3 IC301 M62428AFP IC931 M62016L IC PIN Functions IC101 Digital Signal Processor CXD2587Q Bdcd board Igen RfdcAdio AVSS0 IC101 RF Amplifier CXA2523AR Bdmd board MNT3 Sloc MNT0 FOKMNT1 Shck MNT2 Xbusy Avss MvciAvdd RFI Fgin FS4Sprd Spfd IC501 Master Control M30620ECFP-A21 Main board ST-CE CD-RESETStereo Tuned Case and Front Panel Section Section Exploded Views 59 #3 Chassis Section 113 110 107 MD Mechanism Deck MDM-5A125 126 106 105 MD Base Unit MBU-5A CD Mechanism Deck CDM55A-5SBD32 258 251 CD Base Unit BU-5SBD32255 256 257 253 254 252 254 CD Mechanism Deck CDM55C-5BD32 358 351 CD Base Unit BU-5BD32355 356 357 353 354 352 354 Section Electrical Parts List AMP AMP BD CD BD CD BD MD 2SK1764KYTR Resistor BD MD MD DigitalInductor Chip 2SJ278MYTR MD Digital Loading Main Main EP2 Ground TerminalEP1 Terminal BOARD, Ground Description Remark R402 249-417-11 Jack LINE-IN Indicator TUBE, FluorescentPanel Panel BOARD, Complete Panel Power SWITCH, Push 1 KEY Switch Voltage SelestorTRANSFORMER, SUB Power PIN, Connector 7P SCREW,PRECISION +P Hardware ListScrew +B Memo HCD-MD373 Revision History