Sony HCD-MD373 service manual Block Diagrams BD CD Section

Page 41

HCD-MD373

6-2. BLOCK DIAGRAMS

– BD (CD) SECTION –

OPTICAL PICK-UP BLOCK

(KSS-213BA/NP)

DETECTOR

 

 

 

 

 

 

 

IC103

 

 

 

 

 

E

 

VCC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RF AMP

 

 

 

 

 

 

A

VC

 

 

A

 

 

 

 

 

 

 

 

 

 

 

5

 

 

RF

 

 

 

 

A

C

C

 

 

7

C

 

 

RF EQ

RF

 

B

D

D

 

 

8

D

 

SUMMING

AMP

 

16

 

 

 

 

AMP

 

 

 

B

 

 

6

B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

F

 

 

 

 

 

 

 

FOCUS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FF

 

 

 

 

 

 

 

 

 

 

ERROR

 

 

14

 

 

 

 

 

 

 

 

 

AMP

 

 

 

 

 

 

E

 

 

11

E

 

TRACKING

 

 

TE

 

 

 

F

 

 

10

F

 

 

ERROR

 

 

 

13

 

 

 

 

 

 

AMP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LD

 

LD

 

 

 

 

 

 

 

 

 

 

DRIVE

3

 

 

 

VC

 

 

12

 

 

 

Q101

 

 

 

 

 

BUFFER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VC

 

 

 

 

 

4

PD

APCLD/PD

 

 

LDON 22

 

 

 

 

 

 

 

 

AMP

 

 

 

 

FD

 

LASER

 

 

 

 

 

 

 

 

 

 

 

 

 

DIODE

 

 

 

VREF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HOLD SW

REF

 

 

 

 

 

 

 

 

 

 

 

21

 

15

 

 

 

LD

 

 

 

IC102

 

 

 

 

 

 

 

 

 

POWER

 

 

 

 

 

 

 

 

 

 

 

 

 

FOCUS/TRACKING COIL DRIVE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SPINDLE/SLED MOTOR DRIVE

 

 

 

 

 

TRACKING

T+

11 CH2OUTR

 

 

 

 

 

 

 

 

 

 

 

 

 

TFDR

 

 

 

 

 

COIL

 

T–

12 CH2OUTF

CH2FIN

5

 

 

 

 

 

 

TRDR

 

 

 

 

 

 

 

CH2RIN

 

 

 

 

 

 

 

 

 

 

 

6

 

 

 

 

 

FOCUS

 

F+

14 CH1OUTF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FFDR

 

 

 

 

 

COIL

 

F–

13 CH1OUTR

CH1FIN

2

 

 

 

 

 

 

FRDR

 

 

 

 

 

 

 

CH1RIN

 

 

 

 

 

 

 

 

 

 

 

3

 

 

 

 

 

 

 

M102

SD+

17 CH3OUTF

 

 

 

 

 

 

 

 

 

SLED

M

 

 

 

CH3RIN

23

SRDR

 

 

 

 

 

 

MOTOR

SD–

18 CH3OUTR

SFDR

 

 

 

 

 

 

CH3FIN

24

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

M101

SP+

15 CH4OUTF

 

 

 

 

 

 

 

 

 

SPINDLE

M

 

 

 

CH4SIN 25

 

 

 

 

 

 

 

MOTOR

SP–

16 CH4OUTR

 

 

 

 

 

 

 

CH4BIN

27

 

VC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MUTE 20

•SIGNAL PATH

: CD

09

: CD (Digital out)

 

 

 

 

 

 

 

 

 

IC101

 

 

 

 

 

 

 

 

 

 

DIGITAL SERVO

 

 

 

 

 

 

 

 

 

DIGITAL SIGNAL PROCESSOR

 

 

 

 

 

 

51

 

RF AC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INTEG-

 

49

 

ASY1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RATOR

 

 

 

 

 

 

ASYMMETRY

 

DIGITAL

 

 

 

 

 

 

 

48

 

ASY0

 

CORRECTION

 

 

 

PLL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VC

VC

 

 

38

 

 

 

CE

 

 

 

42

 

 

 

RFDC

 

 

 

43

OPERATIONAL

 

 

FE

A/D

 

39

AMPLIFIER

 

TE

CONVERTER

 

41

ANALOG

INTEG-

SE

SWITCH

 

 

 

RATOR

40

 

 

 

 

 

 

CE

 

 

 

42

 

 

 

 

PWM

SERVO DSP

 

 

GENERATOR

 

TFDR

TRACKING

TRACKING

 

30

PWM

 

TRDR

SERVO

 

31

GENERATOR

 

 

 

 

FFDR

FOCUS

FOCUS

 

32

PWM

 

FRDR

SERVO

 

33

GENERATOR

 

 

 

 

SRDR

SLED

SLED

 

29

PWM

 

SFDR

SERVO

 

28

GENERATOR

 

 

 

 

MDP

DIGITAL

 

 

26

CLV

 

 

 

 

16K

RAM

EFM

DEMODULATION

DATA BUS

SUBCODE

PROCESSOR

SERIAL IN

INTERFACE

OVER SAMPLING DIGITAL FILTER

3rd ORDER

NOISE SHAPER

PWM PWM

 

 

XTA1

 

 

TIMING

66

X101

 

 

ERROR

LOGIC

STAO

16.9344MHz

CORRECTOR

 

67

 

 

 

 

D/A

DIGITAL

D OUT

DOUT

INTERFACE

OUT

60

 

 

 

XRST

3

59

XRST

 

 

SQSO

1

32

SQSO

 

 

SQCK

 

 

 

2

 

 

 

 

 

 

 

 

CPU

SENS

8

56

SENS

 

 

 

 

INTERFACE

DATA

 

81

 

 

SERVO

5

DATA

 

AUTO

XLAT

58

 

6

XLT

 

SEQUENCER

 

 

 

CLOK

 

82

 

 

 

7

CLOK

 

 

 

 

 

 

SCOR

14

19

SCOR

C

 

XLON

20

 

 

 

 

 

 

 

 

 

 

 

 

MAIN

 

 

 

 

 

SECTION

(Page 44)

SERVO

SCLK

33

SQCK

9

 

INTERFACE

SSTP

 

+5V

27

S101

 

 

 

 

RMUT

LIMIT SW

 

 

79

 

 

LMUT

80

LMUT

70

AIN1

71

LOUT1CD-L 72

(L-OUT)

LOUT2

 

R OUT

77

57

 

HOLD

AIN2

 

 

 

76

 

 

LOUT2

 

 

75

 

 

41 41

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Contents 928-998-12 SpecificationsSELF-DIAGNOSIS Function Items of Error History Mode Items and Contents HK, SP, MY, AR, AUS, KR, JE Flexible Circuit Board RepairingAEP, UK Disassembly Table of ContentsDiagrams Exploded ViewsCleaning the Optical Pickup CD Player Drawing OUT the Tray During Power OFFSection Servicing Note Removing the Indication Plate FLService Position the Power Board Hot Reset Cold ResetLED and Fluorescent Indicator Tube All Lit, Key Check Mode Change-over of AM tuner Step between 9kHz and 10kHzError History Display Mode Aging ModeReading the BD Error History Display Reading the Mechanism Error History DisplayTEO JIG for Checking BD MD Board WaveformIOP Record Precedure Forced Reset Checks Prior to Parts Replacement and AdjustmentsREC/PLAY Main Board Component SideTuning +/MD/CD/TUNING + Retry Cause Display ModeHexadecimal nBinary Conversion Table Front Panel Section GeneralLocation of Parts and Controls Page Page Case Section DisassemblyBack Panel Front PanelCD Mechanism Deck Main Board and Power TransformerOptical PICK-UP Section of CD KSS-213BA/F-NP TRAY, Gear and CAMCD Base Unit MD Mechanism Deck BD CD BOARD, Spindle Motor M101 and Sled Motor M102Set the shaft of Cam gear to Spindle Motor M901 and Sled Motor M902 MD Over Write Head Optical PICK-UP of MD KMS-260B/J1NPrecautions for USE of Test Mode Section Test ModeSetting the Test Mode Exiting the Test ModeDisplay Contents Mark Group Selecting the Test ModeNon-Volatile Memory Mode EEP Mode Operating the Continuous Playback ModeMID OUTFunctions of Other Buttons Test Mode DisplaysMeanings of Other Displays MD Section Parts Replacement and Adjustment Section Electrical AdjustmentsPrecautions for USE of Optical PICK- UP KMS-260B Precautions for Checking Laser Diode EmissinonPrecautions for Adjustments Creating Continuously Recorded DiscLaser Power Check Temperature Compensation Offset CheckChecks Prior to Repairs Specified ValueCD Error Rate Check Play Checking MO Error Rate CheckFocus Bias Check Self-Recording/playback CheckTemperature Compensation Offset Adjutment Initial Setting of Adjustment ValueLaser Power Adjustment Recording and Displaying the IOP InformationCheck Traverse AdjustmentPress the ENTER/YES R button, display EFB = Focus Bias AdjustmentAuto Gain Control Output Level Adjustment Error Rate CheckCD Auto Gain Control Output Level Adjustment MO Auto Gain Control Output Level AdjustmentCD Section Adjusting Points and Connecting PointsCurve Check RF Level CheckCircuit Boards Location HCD-MD373 Section DiagramsHCD-MD373 Block Diagrams BD CD SectionREC BD MD /2D/A Converter BD CD Section Main SectionBD MD 1/2 Section Waveforms BD CD 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 Semiconductor Location Printed Wiring Board BD MD SectionSchematic 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 /3HCD-MD373 HCD-MD373 See page 45 for Waveforms See page 67 for IC Block Diagrams Schematic Diagram MD Digital SectionPrinted 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 Printed Wiring Board BD Switch Section Schematic Diagram BD Switch SectionSchematic Diagram Loading Section Printed Wiring Board Loading SectionBD MD Board 1/2 IC101 CXA2523AR IC Block DiagramsBD MD Board 2/2 IC121 CXD2654R IC152 BH6511FS-E2IC153 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 IC PIN Functions IC101 Digital Signal Processor CXD2587Q Bdcd boardAdio RfdcAVSS0 IgenIC101 RF Amplifier CXA2523AR Bdmd board MNT1 Shck MNT0 FOKMNT2 Xbusy MNT3 SlocAvdd MvciRFI AvssSprd FS4Spfd FginIC501 Master Control M30620ECFP-A21 Main board Stereo CD-RESETTuned ST-CECase and Front Panel Section Section Exploded Views59 #3 Chassis Section125 126 106 105 MD Mechanism Deck MDM-5A113 110 107 MD Base Unit MBU-5A CD Mechanism Deck CDM55A-5SBD32 255 256 257 253 254 CD Base Unit BU-5SBD32252 254 258 251CD Mechanism Deck CDM55C-5BD32 355 356 357 353 354 CD Base Unit BU-5BD32352 354 358 351Section Electrical Parts List AMP AMP BD CD BD CD BD MD Inductor Chip BD MD MD Digital2SJ278MYTR 2SK1764KYTR ResistorMD Digital Loading Main Main EP1 Ground TerminalTerminal BOARD, Ground EP2Description Remark R402 249-417-11 Panel Indicator TUBE, FluorescentPanel BOARD, Complete Jack LINE-INPanel Power TRANSFORMER, SUB Power Switch Voltage SelestorPIN, 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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