SERVICE MANUAL US Model Canadian Model Ver. 1.2 2005
HCD-GX355/GX555/RG270/RG475/RG575SERVICE MANUALUS ModelCanadian ModelVer. 1.2 2005.05HCD-GX355/GX555HCD-GX355 is the amplifier, CD player, tape deckand tuner section in MHC-GX355.HCD-GX555 is the amplifier, CD player, tape deckand tuner section in MHC-GX555.HCD-RG270 is the amplifier, CD player, tape deckand tuner section in MHC-RG270.HCD-RG475 is the amplifier, CD player, tape deckand tuner section in MHC-RG475S.HCD-RG575 is the amplifier, CD player, tape deckand tuner section in MHC-RG575S.AEP ModelUK ModelAustralian ModelHCD-RG270/RG475E ModelHCD-RG270/RG475/RG575Photo: HCD-RG575Model Name Using Similar MechanismCDSectionNEWCDM74KFS-F1BD81C (Except Mexican model)/CD Mechanism TypeCDM74KFS-F1BD84 (Mexican model)Base Unit NameBU-F1BD81C (Except Mexican model)/BU-F1BD84 (Mexican model)Optical Pick-up Block NameKSM-215DCPTAPEModel Name Using Similar MechanismNEWSectionTape Transport Mechanism TypeCWM43FF13SPECIFICATIONSAmplifier sectionNorth American model:European and Russian models:AUDIO POWER SPECIFICATIONS(HCD-GX555/GX355 USA model only)HCD-GX555HCD -RG475Front speakerContinuous RMS power output (reference):145 145 watts (6 ohms at1 kHz, 10% THD)Total harmonic distortion less than 0.07% (6 ohms at1 kHz, 80 W)Sub wooferContinuous RMS power output (reference):170 watts (6 ohms at80 Hz, 10% THD)Total harmonic distortion less than 0.07% (6 ohms at80 Hz, 90 W)Front speakerDIN power output (rated): 110 110 watts (6 ohms at1 kHz, DIN)Continuous RMS power output (reference):140 140 watts (6 ohms at1 kHz, 10% THD)Music power output (reference):280 280 watts (6 ohms at1 kHz, 10% THD)Sub wooferDIN power output (rated): 130 watts (6 ohms at80 Hz, DIN)Continuous RMS power output (reference):160 watts (6 ohms at80 Hz, 10% THD)Music power output (reference):320 watts (6 ohms at80 Hz, 10% THD)HCD-GX555POWER OUTPUT AND TOTAL HARMONICDISTORTION:With 6 ohm loads, both channels driven, from120 – 10,000 Hz: rated 145 watts per channelminimum RMS power, with no more than 10%total harmonic distortion from 250 milliwatts torated output.HCD-GX355POWER OUTPUT AND TOTAL HARMONICDISTORTION:With 6 ohm loads, both channels driven, from120 – 10,000 Hz: rated 150 watts per channelminimum RMS power, with no more than 10%total harmonic distortion from 250 milliwatts torated output.HCD-GX355Continuous RMS power output (reference):150 150 watts (6 ohms at1 kHz, 10% THD)Total harmonic distortion less than 0.07% (6 ohms at1 kHz, 80 W)HCD -RG270DIN power output (rated): 80 80 watts (6 ohms at1 kHz, DIN)Continuous RMS power output (reference):100 100 watts (6 ohms at1 kHz, 10% THD)Music power output (reference):200 200 watts (6 ohms at1 kHz, 10% THD)– Continued on next page –COMPACT DISC DECK RECEIVER9-879-533-032005E05-1 2005.05Sony CorporationPersonal Audio GroupPublished by Sony Engineering Corporation
HCD-GX355/GX555/RG270/RG475/RG575Other models:CD player sectionGeneralHCD-RG5 75SystemPower requirementsNorth American model: 120 V AC, 60 HzEuropean and Russian models:230 V AC, 50/60 HzAustralian model:230 – 240 V AC, 50/60 HzArgentine model:220 V AC, 50/60 HzMexican model:127 V AC, 60 HzSaudi Arabian model:120 – 127, 220 or230 – 240 V AC, 50/60 HzAdjustable with voltageselectorOther models:120 V, 220 V or230 – 240 V AC, 50/60 HzAdjustable with voltageselectorThe following measured at AC 120, 127, 220, 240 V50/60 HzFront speakerDIN power output (rated): 100 100 watts (6 ohms at1 kHz, DIN)Continuous RMS power output (reference):125 125 watts (6 ohms at1 kHz, 10% THD)Sub wooferDIN power output (rated): 120 watts (6 ohms at80 Hz, DIN)Continuous RMS power output (reference):150 watts (6 ohms at80 Hz, 10% THD)HCD-RG4 75Front speakerThe following measured at AC 120, 127, 220, 240 V50/60 HzDIN power output (rated): 100 100 watts (6 ohms at1 kHz, DIN)Continuous RMS power output (reference):120 120 watts (6 ohms at1 kHz, 10% THD)Sub wooferDIN power output (rated): 120 watts (6 ohms at80 Hz, DIN)Continuous RMS power output (reference):150 watts (6 ohms at80 Hz, 10% THD)HCD-RG270The following measured at AC 120, 127, 220, 240 V50/60 HzDIN power output (rated): 100 100 watts (6 ohms at1 kHz, DIN)Continuous RMS power output (reference):125 125 watts (6 ohms at1 kHz, 10% THD)InputsAUDIO IN (stereo mini jack):voltage 250 mV,impedance 47 kilohmsMIC (phone jack) (Latin American model only):sensitivity 1 mV,impedance 10 kilohmsOutputsPHONES (stereo mini jack):accepts headphones of8 ohms or moreVIDEO OUT (phono jack) (Mexican model only):max. output level 1Vp-p,unbalanced, Syncnegative, load impedance75 ohmsSPEAKER:accepts impedance of 6 to16 ohmsSUBWOOFER OUT (HCD-GX555/RG575/RG475 only):accepts impedance of 6 to16 ohms2Compact disc and digitalaudio systemLaser Diode PropertiesEmission duration:continuousLaser Output*:Less than 44.6µW* This output is the value measurement at a distance of200mm from the objective lens surface on theOptical Pick-up Block with 7mm aperture.Frequency responseSignal-to-noise ratioDynamic range2 Hz – 20 kHz ( 0.5 dB)More than 90 dBMore than 90 dBTape deck sectionRecording systemFrequency response4-track 2-channel, stereo50 – 13,000 Hz ( 3 dB),using Sony TYPE IcassettesTuner sectionFM stereo, FM/AM superheterodyne tunerFM tuner sectionTuning rangeNorth American model:Other models:AntennaAntenna terminalsIntermediate frequencyAM tuner sectionTuning rangePan-American models:87.5 – 108.0 MHz(100 kHz step)87.5 – 108.0 MHz(50 kHz step)FM lead antenna75 ohms unbalanced10.7 MHz530 – 1,710 kHz(with the tuning intervalset at 10 kHz)531 – 1,710 kHz(with the tuning intervalset at 9 kHz)European, Russian and Saudi Arabian models:531 – 1,602 kHz (with thetuning interval set at9 kHz)Other models:530 – 1,710 kHz(with the tuning intervalset at 10 kHz)531 – 1,602 kHz(with the tuning intervalset at 9 kHz)AntennaAM loop antennaIntermediate frequency450 kHzPower consumptionUSA model:HCD -GX555:285 wattsHCD -GX355:210 wattsCanadian model:HCD -GX555:380 VAHCD -GX355:290 VAEuropean and Russian models:HCD-RG475:300 watts0.25 watts (at the PowerSaving Mode)HCD -RG270:190 watts0.25 watts (at the PowerSaving Mode)Other models:HCD-RG575:300 wattsHCD-RG475:300 wattsHCD -RG270:210 wattsDimensions (w/h/d) (excl. speakers)Approx. 280 325430 mmMass (excl. speakers)North American models:HCD-GX555:Approx. 10.5 kgHCD-GX355:Approx. 10.0 kgCanadian model:HCD-GX555:Approx. 10.5 kgHCD-GX355:Approx. 10.0 kgEuropean and Russian models:HCD-RG475:Approx. 10.5 kgHCD-RG270:Approx. 8.7 kgOther models:HCD-RG575:Approx. 10.5 kgHCD-RG475:Approx. 10.5 kgHCD-RG270:Approx. 10.0 kgDesign and specifications are subject to changewithout notice.
HCD-GX355/GX555/RG270/RG475/RG575SAFETY CHECK-OUTAfter correcting the original service problem, perform the followingsafety check before releasing the set to the customer:Check the antenna terminals, metal trim, “metallized” knobs, screws,and all other exposed metal parts for AC leakage.Check leakage as described below.LEAKAGE TESTThe AC leakage from any exposed metal part to earth ground andfrom all exposed metal parts to any exposed metal part having areturn to chassis, must not exceed 0.5 mA (500 microamperes.).Leakage current can be measured by any one of three methods.1. A commercial leakage tester, such as the Simpson 229 or RCAWT-540A. Follow the manufacturers’ instructions to use theseinstruments.2. A battery-operated AC milliammeter. The Data Precision 245digital multimeter is suitable for this job.3. Measuring the voltage drop across a resistor by means of aVOM or battery-operated AC voltmeter. The “limit” indicationis 0.75 V, so analog meters must have an accurate low-voltagescale. The Simpson 250 and Sanwa SH-63Trd are examplesof a passive VOM that is suitable. Nearly all battery operateddigital multimeters that have a 2 V AC range are suitable. (SeeFig. A)Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may bedamaged by heat.Flexible Circuit Board Repairing Keep the temperature of the soldering iron around 270 Cduring repairing. Do not touch the soldering iron on the same conductor of thecircuit board (within 3 times). Be careful not to apply force on the conductor when solderingor unsoldering.CAUTIONUse of controls or adjustments or performance of proceduresother than those specified herein may result in hazardous radiationexposure.This appliance is classified asa CLASS 1 LASER product.This marking is located on therear exterior.To Exposed MetalParts on Set0.15 µF1.5 k ΩACvoltmeter(0.75 V)Earth GroundFig. A. Using an AC voltmeter to check AC leakage.UNLEADED SOLDERBoards requiring use of unleaded solder are printed with the leadfree mark (LF) indicating the solder contains no lead.(Caution: Some printed circuit boards may not come printed withthe lead free mark due to their particular size)SAFETY-RELATED COMPONENT WARNING!!COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINEWITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND INTHE PARTS LIST ARE CRITICAL TO SAFE OPERATION.REPLACE THESE COMPONENTS WITH SONY PARTS WHOSEPART NUMBERS APPEAR AS SHOWN IN THIS MANUAL ORIN SUPPLEMENTS PUBLISHED BY SONY.ATTENTION AU COMPOSANT AYANT RAPPORTÀ LA SÉCURITÉ!LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SURLES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DESPIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DEFONCTIONNEMENT. NE REMPLACER CES COM- POSANTSQUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONTDONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTSPUBLIÉS PAR SONY.: LEAD FREE MARKUnleaded solder has the following characteristics. Unleaded solder melts at a temperature about 40 C higherthan ordinary solder.Ordinary soldering irons can be used but the iron tip has to beapplied to the solder joint for a slightly longer time.Soldering irons using a temperature regulator should be set toabout 350 C.Caution: The printed pattern (copper foil) may peel away ifthe heated tip is applied for too long, so be careful! Strong viscosityUnleaded solder is more viscou-s (sticky, less prone to flow)than ordinary solder so use caution not to let solder bridgesoccur such as on IC pins, etc. Usable with ordinary solderIt is best to use only unleaded solder but unleaded solder mayalso be added to ordinary solder.3
HCD-GX355/GX555/RG270/RG475/RG575Ver. 1.1TABLE OF CONTENTS1.SERVICING NOTES . 52.GENERAL . -10.3-11.3-12.3-13.3-14.Disassembly Flow .Case (Top) .Door (CD) .Front Panel Section .Mechanical Deck (CWM43FF13) .CD Mechanism Deck (CDM74KFS-F1BD81C (ExceptMX model)/CDM74KFS-F1BD84 (MX model)) .Back Panel Section .MAIN Board .BD Board/CD Board .DRIVER Board, SW Board .Optical Pick-up (KSM-215DCP) .SENSOR Board .MOTOR (TB) Board .MOTOR (LD) Board .4.TEST MODE . 165.ELECTRICAL ADJUSTMENT . 206.DIAGRAMS6-1.6-2.6-3.6-4.Block Diagram – CD SERVO Section – .Block Diagram – AUDIO/VIDEO Section – .Block Diagram – AMP Section – .Block Diagram– PANEL, POWER SUPPLY Section – .Printed Wiring Board– CD Board – (Except MX model) .Schematic Diagram– CD Board – (Except MX model) .Printed Wiring Board – BD Board – (MX model) .Schematic Diagram – BD Board – (MX model) .Printed Wiring Boards – CHANGER Section – .Schemtic Diagram – CHANGER Setion – .Printed Wiring Board – MAIN Board – .Schematic Diagram – MAIN Board (1/3) – .Schematic Diagram – MAIN Board (2/3) – .Schematic Diagram – MAIN Board (3/3) – .Printed Wiring Board – POWER Board – .Schematic Diagram –POWER Board – .Printed Wiring Board – SUB WOOFER Board –(GX555/RG475/RG575 only) .Schematic Diagram – SUB WOOFER Board –(GX555/RG475/RG575 only) .Printed Wiring Boards– AUDIO, MIC, HEADPHONE Boards – .Schematic Diagram– AUDIO, MIC, HEADPHONE Boards – .Printed Wiring Boards – CD-G Section –(MX model only) .Schematic Diagram – CD-G Section –(MX model only) .Printed Wiring Board – PANEL Section (1/2) .Printed Wiring Board – PANEL Section (2/2) .Schematic Diagram – PANEL Section (1/2) .Schematic Diagram – PANEL Section (2/2) .Printed Wiring Boards – TRANS Section – .Schematic Diagram – TRANS Section – EXPLODED VIEWS7-1.7-2.7-3.7-4.7-5.7-6.7-7.Overall Section .Back Panel Section .Front Panel Section .Key Section .Chassis Section .Transformer Section .CD Mechanism Deck Section-1(CDM74KFS-F1BD81C) (Except MX model)/(CDM74KFS-F1BD84) (MX model) .7-8. CD Mechanism Deck Section-2(CDM74KFS-F1BD81C) (Except MX model)/(CDM74KFS-F1BD84) (MX model) .8.6667686970717273ELECTRICAL PARTS LIST . 74 AbbreviationMX: Mexican model
HCD-GX355/GX555/RG270/RG475/RG575Ver. 1.1SECTION 1SERVICING NOTESNOTES ON HANDLING THE OPTICAL PICK-UPBLOCK OR BASE UNIT MODEL IDENTIFICATION– Back Panel –Model number labelThe laser diode in the optical pick-up block may suffer electrostaticbreak-down because of the potential difference generated by thecharged electrostatic load, etc. on clothing and the human body.During repair, pay attention to electrostatic break-down and alsouse the procedure in the printed matter which is included in therepair parts.The flexible board is easily damaged and should be handled withcare.NOTES ON LASER DIODE EMISSION CHECKThe laser beam on this model is concentrated so as to be focused onthe disc reflective surface by the objective lens in the optical pickup block. Therefore, when checking the laser diode emission,observe from more than 30 cm away from the objective lens.LASER DIODE AND FOCUS SEARCH OPERATIONCHECKCarry out the “S curve check” in “CD section adjustment” and checkthat the S curve waveforms is output three times.Label indication2-348-857-01 CA2-560-970-01 UModelGX355: CNDGX555: US2-560-971-01 CA2-560-972-01 CED2-560-974-01 E32-560-975-01 AU2-560-979-01 U2-560-980-01 CED2-560-982-01 E32-560-982-11 E22-560-983-01 EA32-560-984-01 SP22-560-985-01 AU2-560-986-01 E512-560-987-01 MX42-560-987-11 MX42-560-988-01 AR2-560-995-01 SP22-580-005-01 E22-580-005-11 E32-580-007-01 E512-580-008-01 MX42-580-008-11 MX42-580-009-01 ARGX555: CNDRG475: AEP, UK, EE, RURG475: E3RG475: AUSGX355: USRG270: AEP, UK, EE, RURG270: E3RG270: E2EARG475: SPRG270: AUSRG270: E51RG270: MXRG270: ARRG575: SPRG575: E2RG575: E51RG575: MXRG575: AR AbbreviationAR: Argentine modelAUS : Australian modelCND : Canadian modelE2: 120V AC Area in E modelE3: 240V AC Area in E modelE51: Chilean and Peruvian modelsEA: Saudi Arabia modelEE: East European modelMX: Mexican modelRU: Russian modelSP: Singapore model5
HCD-GX355/GX555/RG270/RG475/RG575SECTION 2GENERALThis section is extracted frominstruction manual. Location of ControlsMain unitBUTTON DESCRIPTIONSALPHABETICAL ORDERA–OP–ZALBUM /– qsAUDIO IN wlAUDIO IN jack wfCD esCD SYNC wjDeck A wgDeck B qkDISC 1 – 3 qaDISC SKIP/EX-CHANGE qdDisc tray 0DISPLAY 3Display window 5ECHO LEVEL1) waEFFECT ON/OFF 4ENTER 4EQ BAND qsGROOVE 4ILLUMINATION 2MIC jack2) wdMIC LEVEL2) wsMULTIPL EX1) 6Operation Dial(– EQ /l L/– TUNING ) qjP FILE 4PHONES jack w;PLAY MODE 8Power illuminator qgPRESET EQ 4REC PAUS E/START wlRemote sensor 7SUBWOOFER ON/OFF3) 9SURROUND 4TAP E A/B e;TUNER/BAND eaTUNING MODE 8VOLUME control ql?/1 (power) 1X (pause) qsx (stop) qsM (fast forward) qsN (play) qsm (rewind) qsZ (eject) qfPUSH Z (deck B) (eject) qhZ PUSH (deck A) (eject) wh1)2)3)1 2 3 456789q;eseae;wlwkwjwhwgLljHSsABwfwd ws wa6Mexican model onlyLatin American model only(Mexican model comes with2 microphone jacks)HCD-GX555/RG575/RG475 onlyqaqsqdqfqgqhqjqkqlw;
HCD-GX355/GX555/RG270/RG475/RG575Remote controlBUTTON DESCRIPTALPHABETICAL ORDERA–EF–ZALBUM qaALBUM – qdCD qkCLEAR qgCLOCK/TIMER SELECT 2CLOCK/TIMER SET 3DISC SKIP q;DISPLAY waENTER 9EQ qfFM MODE 4FUNCTION 6PLAY MODE w;REPEAT 4SLEEP wsTAPE qjTUNER BAND 5TUNER MEMORY qlTUNING MODE w;VOLUME /– qs?/1 (power) 1m/M (rewind/fast forward)7N (play) 8X (pause) 8x (stop) 8 /– (tuning) qh./ (go back/go forward)qhIONSwswaw;qlqkqjqh12345678qg9qfq;qdqaqs7
HCD-GX355/GX555/RG270/RG475/RG575Ver. 1.1SECTION 3DISASSEMBLY This set can be disassembled in the order shown below.3-1. DISASSEMBLY FLOWSET3-2. CASE (TOP)(Page 9)3-3. DOOR (CD)(Page 9)3-4. FRONT PANEL SECTION(Page 10)3-6. CD MECHANISM DECK(CDM74KFS-F1BD81C (EXCEPT MX MODEL)/CDM74KFS-F1BD84 (MX MODEL))(Page 11)3-7. BACK PANEL SECTION(Page 11)3-8. MAIN BOARD(Page 12)3-5. MECHANICAL DECK(CWM43FF13)(Page 10)3-9. BD BOARD/CD BOARD(Page 12)3-11. OPTICAL PICK-UP(KSM-215DCP)(Page 13)3-10. DRIVER BAORD,SW BOARD(Page 13)3-12. SENSOR BOARD(Page 14)3-13. MOTOR (TB) BOARD(Page 14)3-14. MOTOR (LD) BOARD(Page 15)8
HCD-GX355/GX555/RG270/RG475/RG575Note: Follow the disassembly procedure in the numerical order given.3-2. CASE (TOP)0 case (top)5 two screws (B3)6 case (side-R)7 two screws89892 two screws (B3)4 three screws(case 3 TP2)3 case (side-R)1 three screws(case 3 TP2)3-3. DOOR (CD)3 two claws4 door (CD)–BOTTOM VIEW–CD mechanism deck1 Turn the pulley in the direction of the arrow.Front panel side2 Pull-out the disc tray.9
HCD-GX355/GX555/RG270/RG475/RG5753-4. FRONT PANEL SECTION AbbreviationAR : Argentina modelE2 : 120V AC Area in E modelE51 : Chilean and Peruvian modelsMX : Mexican model1 connector(CN061)(E2, E51, AR, MX)5 connector(CN066)8 screw (B3)7 screw(B3)4 connector (CN065)9 front panel section2 connector(CN203)3 connector (CN201)6 four screws (B3)3-5. MECHANICAL DECK (CWM43FF13)(except MX) AbbreviationMX : Mexican model3 coating clip1 screw(2.6 8)2 harness5 two screws(2.6 8)(MX)7 cover (TCM)4 two screws(2.6 8) (except MX)(2.6 10) (MX)6 screw(2.6 8)8 mecanical deck(CWM43FF13)10
HCD-GX355/GX555/RG270/RG475/RG575Ver. 1.13-6. CD MECHANISM DECK(CDM74KFS-F1BD81C (EXCEPT MX MODEL)/CDM74KFS-F1BD84 (MX MODEL))7 CD mechanism deck(CDM74KFS-F1BD81C (except MX)/CDM74KFS-F1BD84 (MX))(MX)6 connector(CN1004)1 three screws (B3)(MX)5 wire (flat type)(13 core) (CN331)2 AbbreviationMX : Mexican model3 wire (flat type) (13 core) (CN701)4 wire (flat type) (27 core) (CN201) (Except MX)wire (flat type) (31 core) (CN201) (MX)3-7. BACK PANEL SECTION8 back panel section3 connector(CN901)4 wire (flat type) (15 core)(CN381)5 connector(CN041)2 connector(CN903)1 connector(CN906)6 two screws (B3)7 two screws (B3)11
HCD-GX355/GX555/RG270/RG475/RG5753-8. MAIN BOARD4 connector(CN441)5 MAIN boardMAIN board1 connector(CN907)2 connector(CN905)3 two screws (B3)3-9. BD BOARD/CD BOARD2 screw( BVTP 2.6 8) AbbreviationMX : Mexican model4 BD board (MX)/CD board (except MX)3 Remove soldering from the four points.121 wire (flat type) (16 core) (CN101)
HCD-GX355/GX555/RG270/RG475/RG575Ver. 1.13-10. DRIVER BOARD, SW BOARD1 two screws( BTTP (M2.6))3 connector4p (CN703)4 DRIVER board5 screw( BTTP (M2.6))6 SW board2 wire (flat type) 5p (CN702)3-11. OPTICAL PICK-UP (KSM-215DCP) AbbreviationMX : Mexican model1 floating screw( PTPWH M2.6)2 holder (213) ASSY9qf optical pick-up(KSM-215DCP)8 two insulators5 two insulators4 two coil springs(insulator)7 two coil springs(insulator)3 two floating screw( PTPWH M2.6)6 two floating screw( PTPWH M2.6)qs wire (flat type)(CN101)qd BD board (MX)/CD board (except MX)qa Remove the four solderings of motor.0 screw ( BVTP 2.6x 8)13
HCD-GX355/GX555/RG270/RG475/RG5753-12. SENSOR BOARD1 floating screw( PTPWH M2.6)2 tray8 screw( BTTP (M2.6))3 belt (table)0 SENSOR board4 floating screw( PTPWH M2.6)5 pulley (table)6 floating screw( PTPWH M2.6)9 connector(CN731)7 gear (geneva)3-13. MOTOR (TB) BOARD2 stopper41 stopper5 table motor assy (M741)3 wire (flat type) 5 core (CN742)7 MOTOR (TB) board6 Remove the two solderings of motor.5 two screws( BTTP (M2.6))14
HCD-GX355/GX555/RG270/RG475/RG5753-14. MOTOR (LD) BOARD2 two screws( BTTP (M2.6))4 Remove the two solderings of motor.3 MOTOR (LD) board5 loading motor assy (M751)1 belt (loading)15
HCD-GX355/GX555/RG270/RG475/RG575SECTION 4TEST MODEMC COLD RESETAMP TEST MODEThe cold reset clears all data including preset data stored in theRAM to initial conditions. Execute this mode when returning theset to the customer.Procedure:1. Press three buttons of x , [ILLUMINATION] and [DISC 1]simultane-ously.2. The message “COLD RESET” is displayed on the fluorescentindicator tube momentarily, then becomes standby states.This mode is used to display the parameter of amplifier IC anddisplay the VACS status.Procedure:1. Press the I/1 button to turn the power on.2. Press three buttons of x , [ILLUMINATION] and [PRESET EQ]simultaneously.3. When the AMP test mode is activated, the message “AMPTEST IN” is displayed on the fluorescent indicator tubemomentarily, then amplifier adjustment mode is displayed onthe fluorescent indicator tube.4. Press the [DISPLAY] button to changed over between VACSstatus display mode and the amplifier IC parameter displaymode.5. In this mode, press the [GROOVE] button to changed overDBFB on/off, and “DBFB ON” or “DBFB OFF” is displayedon the fluorescent indicator tube.6. In this mode, press the [SURROUND] button to changed oversurround on/off, and “SURROUND ON” or “SURROUNDOFF” is displayed on the fluorescent indicator tube.7. In this mode, press the [EQ BAND] button to enter the equalizeradjustment mode.In the equalizer adjustment mode, press the [EQ BAND] buttonto change over the adjustment band as LOW/MID/HIGH. Andturn the [l --- EQ L] knob to adjust the equalizer level ofeach bands.8. To release the amplifier IC parameter display mode or equalizeradjustment mode, press the I/1 button to the power off.AM TUNING INTERVAL CHANGE-OVER(Except AEP, UK, East European, Russian models)A step of AM tuning interval can be changed over between 9 kHzand 10 kHz.Procedure:1. Press the I/1 button to turn the power on.2. Press the [TUNER/BAND] button to select “AM”.3. Press the I/1 button to turn the power off.4. Press two buttons of [PLAY MODE/TUNING MODE] and I/1simultaneously.5. The message “AM 9K STEP” or “AM 10K STEP” is displayedon the fluorescent indicator tube, and thus the channel step ischanged over.CD SHIP (LOCK) MODEThis mode moves the optical pick-up to the position durable tovibration. Use this mode when returning the set to the customerafter repair.Procedure:1. Press the I/1 button to turn the power on.2. Press the [CD] button to select “CD”.3. Press two buttons of [CD] and [POWER] simultaneously.4. The message “LOCK” is displayed on the fluorescent indicatortube, and the CD ship mode is set.CD SHIP (LOCK) MODE & COLD RESETThis mode is used to perform CD chip (lock) mode and cold resetsimultaneously.Procedure:1. Press the I/1 button to turn the power on.2. Press the [CD] button to select “CD”.3. Press three buttons of x , [CD] and [DISPLAY] simultaneously.4. The message “COLD RESET” is displayed on the fluorescentindicator tube momentarily, then becomes standby states.CD TRAY LOCK MODEThis mode is used to unable to take sample disc out of tray in theshop.Procedure:1. Press the I/1 button to turn the power on.2. Press the [CD] button to select “CD”.3. Load a disc and press two buttons of x and Z for 5 seconds.4. The message “LOCKED” is displayed on the fluorescentindicator tube and the CD tray is locked. (Even if pressingthe Z button, the message “LOCKED” is displayed on thefluorescent indicator tube and the CD tray is locked)5. To release this mode, press two buttons of x and Z for 5seconds.6. The message “UNLOCKED” is displayed on the fluorescentindicator tube and the CD tray is unlocked.16
HCD-GX355/GX555/RG270/RG475/RG575AGING MODEThis mode can be used for operation check of CD section and tapedeck section.CD section and tape deck section work in parallel.If an error occurred:The aging operation stops only an error occurred sections and displaythen status.If no error occurs:The aging operation continues repeatedly.Procedure:1. Press the I/1 button to turn the power on.2. Press the [CD] button to select “CD”.3. Load three discs and insert two tape to the deck A and B.4. Press three buttons of x , [ILLUMINATION] and [DISC SKIP/EXCHANGE] simultaneously.5. Aging operations of CD and tape are started at the same time.6. To release this mode, press the I/1 button to turn the poweroff or press the function buttons to change the function.1. Display at the Aging ModeDisplay operating state of CD section and tape deck sectionalternately.If an error occurred, stop display which that section.3. Tape Deck SectionThe sequence during the aging mode is following as below.If an error occurred, stop display that step.Aging mode sequence (tape deck section) :Rewind the tape A and B“TAPE AAG-1 or TAPE BAG-2”Shut offFWD play the tape A“TAPE AAG-3”2 minutesRewind the tape A“TAPE AAG-6”Shut offFWD play the tape B“TAPE BAG-3”2 minutes2. CD SectionThe sequence during the aging mode is following as below.Display at the aging mode is the same as the normal operation.Rewind the tape B“TAPE BAG-6”Shut offAging mode sequence (CD section) :Start (from disc 1)Note: “TAPE *AG-*” is display of each step.PANEL TEST MODEDisc chuckingTOC readPlay first track for 2 secondsPlay last track for 2 secondsEX-change open/closeOpen the disc trayDisc skipClose the trayChange the next disc.This mode is used to check the fluorescent indicator tube, LEDsand buttons.Procedure:1. Press the I/1 button to turn the power on.2. Press three buttons of x , [ILLUMINATION] and [GROOVE]simultaneously.3. Fluorescent indicator tube and LEDs are all turned on.4. Press two buttons of [ALBUM ---] and [ENTER] simultaneously,mode is changed over.5. In the key check mode, press each key, the defined key numberof every each key list is displayed on the fluorescent indicatortube.6. In the key count check mode, “KEYCNT 0” is displayed onthe fluorescent indicator tube. Each time a key is pressed, “K”value increases. However, once a key is pressed, it is no longertaken into account.7. In the headphone input check mode, connect the headphone,the message “H P ON” is displayed on the fluorescentindicator tube, and disconnect the headphone, the message“H P OFF” is displayed on the fluorescent indicator tube.8. In the volume check mode, “VOLUME FLAT” is displayedon the fluorescent indicator tube. Turn the [MASTERVOLUME] knob clockwise, the message “VOLUME UP”is displayed on the fluorescent indicator tube momentarilyand turn the [MASTER VOLUME] knob counterclockwise,the message “VOLUME DOWN” is displayed on thefluorescent indicator tube momentarily.17
HCD-GX355/GX555/RG270/RG475/RG575MC TEST MODEThis mode is used to check operations of microprocessor.Procedure:1. Press the I/1 button to turn the power on.2. Press three buttons of x , [ILLUMINATION] and [DISC 3]simultane-ously.3. When the MC test mode is activated, VACS level is displayedon the fluorescent indicator tube momentarily.4. Turn the [l --- EQ L] knob clockwise, the message“ALL EQ MAX” is displayed on the fluorescent indicatortube momentarily and turn the [l --- EQ L] knobcounter-clockwise, the message “ALL EQ MIN” isdisplayed on the fluorescent indicator tube momentarily.5. Press the [PRESET EQ] button, the message “ALL EQ FLAT”is displayed on the fluorescent indicator tube momentarily.6. Turn the [MASTER VOLUME] knob clockwise, the message“VOLUME MAX” is displayed on the fluorescent indicatortube momentarily and turn the [MASTER VOLUME] knobcounterclockwise, the message “VOLUME MIN” is displayedon the fluorescent indicator tube momentarily.7. Press the [GROOVE] button to changed over VACS on/off.8. When the [CD SYNC] key is pressed with the test tape (AMS100, AMS-110A) in the deck, number of space between tunesis counted, then if AMS-110A is set, “OK” is displayed on thefluorescent indicator tube and if AMS-100 is set, “NG” isdisplayed on the fluorescent indicator tube.9. Press the I/1 button to release from this mode, then cold resetis performed.1. Mechanism Deck Error Code ModeWhen this mode is entered, mechanism deck error code is displayedwith the 10-character format on the fluorescent indicator tube.The first digit from t
Sony Corporation Personal Audio Group Published by Sony Engineering Corporation Photo: HCD-RG575 HCD-GX355 is the amplifier, CD player, tape deck and tuner section in MHC-GX355. HCD-GX555 is the amplifier, CD player, tape deck and tuner section in MHC-GX555. HCD-RG270 is the amplifier, CD player, tape deck and tuner section in MHC-RG270.
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