Sony service manual HCD-MD373 Revision History

Page 98

HCD-MD373

REVISION HISTORY

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Ver.

Date

Description of Revision

1.12001.06 Addition of CD mechanism (CDM55C-5BD32) and base unit

(BU-5BD32).

(SPM-01016)

1.0

1999.08

New.

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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 Diagrams Table of ContentsDisassembly Exploded ViewsSection Servicing Note Drawing OUT the Tray During Power OFFCleaning the Optical Pickup CD Player Removing the Indication Plate FLService 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 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 REC/PLAY Checks Prior to Parts Replacement and AdjustmentsForced Reset 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 MDSetting the Test Mode Section Test ModePrecautions for USE of Test Mode Exiting the Test ModeSelecting the Test Mode Display Contents Mark GroupMID Operating the Continuous Playback ModeNon-Volatile Memory Mode EEP Mode OUTTest Mode Displays Functions of Other ButtonsMeanings of Other Displays Section Electrical Adjustments MD Section Parts Replacement and AdjustmentPrecautions for Adjustments Precautions for Checking Laser Diode EmissinonPrecautions for USE of Optical PICK- UP KMS-260B Creating Continuously Recorded DiscChecks Prior to Repairs Temperature Compensation Offset CheckLaser Power Check Specified ValueFocus Bias Check Play Checking MO Error Rate CheckCD Error Rate Check Self-Recording/playback CheckLaser Power Adjustment Initial Setting of Adjustment ValueTemperature Compensation Offset Adjutment Recording and Displaying the IOP InformationTraverse Adjustment CheckFocus 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 AdjustmentCurve Check Adjusting Points and Connecting PointsCD Section RF Level CheckHCD-MD373 Section Diagrams Circuit Boards LocationBlock Diagrams BD CD Section HCD-MD373BD MD /2 RECD/A Converter Main Section BD CD SectionBD MD 2/2 Section Waveforms BD CD SectionBD MD 1/2 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 Loading Section Schematic Diagram BD Switch SectionPrinted Wiring Board BD Switch 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 FunctionsAVSS0 RfdcAdio IgenIC101 RF Amplifier CXA2523AR Bdmd board MNT2 Xbusy MNT0 FOKMNT1 Shck MNT3 SlocRFI MvciAvdd AvssSpfd FS4Sprd FginIC501 Master Control M30620ECFP-A21 Main board Tuned CD-RESETStereo 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 252 254 CD Base Unit BU-5SBD32255 256 257 253 254 258 251CD Mechanism Deck CDM55C-5BD32 352 354 CD Base Unit BU-5BD32355 356 357 353 354 358 351Section Electrical Parts List AMP AMP BD CD BD CD BD MD 2SJ278MYTR BD MD MD DigitalInductor Chip 2SK1764KYTR ResistorMD Digital Loading Main Main Terminal BOARD, Ground Ground TerminalEP1 EP2Description Remark R402 249-417-11 Panel BOARD, Complete Indicator TUBE, FluorescentPanel Jack LINE-INPanel Power PIN, Connector 7P Switch Voltage SelestorTRANSFORMER, SUB Power 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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