Sony-TCTX77-tape-sm 维修电路原理图.pdf

MICROFILMTC-TX77STEREO CASSETTE DECKSERVICE MANUALAEP ModelUK ModelModel Name Using Similar MechanismTC-S1Tape Transport Mechanism TypeTCM-9700HLDSPECIFICATIONSDolby noise reduction manufactured under licensefrom Dolby Laboratories Licensing Corporation.“DOLBY” and the double-D symbol a are trademarksof Dolby Laboratories Licensing Corporation.RadioFans.CN 收音机爱 好者资料库 2 TABLE OF CONTENTS1.GENERAL.32.DISASSEMBLY. 43.MECHANICAL ADJUSTMENTS.74.ELECTRICAL ADJUSTMENTS. 75.DIAGRAMS5-1.IC Pin Function Description. 115-2.Printed Wiring Boards . 135-3.Schematic Diagram . 176.EXPLODED VIEWS. 237.ELECTRICAL PARTS LIST. 28SAFETY-RELATED COMPONENT WARNING!COMPONENTS IDENTIFIED BY MARK ! OR DOTTEDLINE WITH MARK ! ON THE SCHEMATIC DIAGRAMSAND IN THE PARTS LIST ARE CRITICAL TO SAFEOPERATION. REPLACE THESE COMPONENTS WITHSONY PARTS WHOSE PART NUMBERS APPEAR ASSHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-LISHED BY SONY.RadioFans.CN 收音机爱 好者资料库 3 SECTION 1GENERALThis section is extractedfrom instruction manual. 4 SECTION 2DISASSEMBLY This set can be disassembled in the order shown below.2Note: Follow the disassembly procedure in the numerical order given.COVER, FRONT PANEL SECTIONAUDIO/CONNECTOR BOARD, POWER TRANSFORMER (T901)(Page 5)TRAY (A) ASSY(Page 6)COVER, FRONT PANEL SECTION(Page 4)MECHANISM DECK (TCM-9700HLD)(page 5)MOTOR (HK) ASSY (M902)(Page 6)1two screws(CASE 3 TP2)3wire (flat type) (5 core)(CN301)4two screws(BVTP3 8)1two screws(CASE 3 TP2)8LID (R-TC)7two claws3wire (flat type)(27 core) (CN802)6front panel section5three claws4two screws(BVTP3 8)2Remove the cover todirection of the arrow. 5 MECHANISM DECK (TCM-9700HLD)AUDIO/CONNECTOR BOARD, POWER TRANSFORMER (T901)4lag5mechanism deck(TCM-9700HLD)1connector(CN351)2two screws(BVTP3 8)1connector(CN803)1connector(CN804)3two screws(BVTP3 8)6power thansformer(T901)8connector board!four screws(BVTP3 8)9screw(BVTP3 10)!audio board3wire (flat type) (15 core)(CN711)2connector(CN351)1power cord(CN901)5connector(CN701)7two connectors(CN713, 715)4four screws(BVTT3 6) 6 TRAY (A) ASSYMOTOR (HK) ASSY (M902)2two clawsAtray3tray (A) assytray (A) assy1Rotate the gear assy in directionarrow A to up the tray.1six screws(BVTT2.6 8)5three step screws(MOTOR)6motor (HK) assy(M902)3Remove the belt to positionfigure the hang.2mechanism deck4Remove the soldersof motor (M902). 7 SECTION 3MECHANICAL ADJUSTMENTSSECTION 4ELECTRICAL ADJUSTMENTSPRECAUTION1.Clean the following parts with a denatured-alcohol-moistenedswab:record/playback/earth headpinch rollerrubber beltscapstanidlers2.Demagnetize the record/playback head with a head demagne-tizer. (Do not bring the head demagnetizer close to the erasehead.)3.Do not use a magnetized screwdriver for the adjustments.4.After the adjustments, apply suitable locking compound to theparts adjusted.5.The adjustments should be performed with the rated powersupply voltage unless otherwise noted.Torque MeasurementPRECAUTION1.The adjustment should be performed in the publication.(Be sure to male playback adjustment at first.)2.The adjustments and measurement should be performed forboth L-CH and R-CH. Switch positionDOLBY NR switch: OFFDIRECTION switch: A Standard record positionDeliver the standard input signal level to input jack and setthe REC LEVEL (RV301) control to obtain the standardoutput signal level as follows. Record Mode setAF OSCattenuator600 10 k LINE IN+LINE OUT47 k level meterStandard Input LevelInput terminalLINE INsource impedance10 kinput signal level0.5 V ( 3.8 dB)Standard Output LevelOutput terminalLINE OUT (L-CH)load impedance47 koutput signal level0.5 V ( 3.8 dB)Test TapeTypeSignalUsed forP-4-A10010 kHz, 10 dBAzimuth AdjustmentP-4-L300315 Hz,0 dBPB Level AdjustmentWS-48B3 kHz,0 dBTape Speed Adjustment0 dB = 0.775 VModeTorque MeterMeter ReadingCQ-102C30 65 gcmFWD(0.42 0.90 ozinch)FWD1.5 6 gcmBack tension(0.021 0.083 ozinch)CQ-102RC30 65 gcmREV(0.42 0.90 ozinch)REV1.5 6 gcmBack tension(0.021 0.083 ozinch)70 130 gcmFF, REWCQ-201B(0.98 1.80 ozinch)Test ModeWith the POWER turned OFF, short the test point CN801 (2P) onthe SYSTEM CONTROL board (making IC801 pin ! “L”) andturn the POWER ON. Thus, the TEST mode will be activated.If a recording is done in the TEST mode, the REC MEMORYmode becomes active where the tape is rewound by the amount ofrecording when a rewinding is executed after recording.After adjustment, make the CN801 (2P) open to release the TESTmode. 8 Record/Playback Head Azimuth AdjustmentProcedure:1.Mode: REV playback+set47 k LINE OUTlevel metertest tapeP-4-A100(10 kHz, 10 dB)2.Turn the adjustment screw for the maximum output levels. Ifthese levels do not match, turn the adjustment screw until bothof output levels match together within 1 dB.Tape Speed AdjustmentProcedure:Mode: FWD playback+setLINE OUTfrequency countertest tapeWS-48B(3 kHz, 0 dB)47 k 1. Set to FWD playback mode.2. Adjust RV801 so that the frequency counter reading becomes3,000 90 Hz.3. Confirm that the deviation between tape top and tape end iswithin 3%.Adjustment Location: SYSTEM CONTROL board (See page 10)Sample Value of Wow and flutter:0.3% or less W.RMS(WS-48B)Playback Level AdjustmentProcedure:Mode: FWD playbackScrewpositionL-CHpeakwithin1dBoutputlevelL-CH peakR-CH peakwithin1dBangleR-CHpeak3.Phase CheckMode: REV playback+VH+Screen patternGoodWrongin phase 4590135180LINE OUTsetR-CHL-CH47 k 47 k oscilloscopetest tapeP-4-A100(10 kHz, 10 dB)4.Set in the FWD mode and repeat the step 1 to 3.5.After the adjustment, lock the screw with locking compound.Adjustment Location: Record/Playback headFWD sideREV sideAdjustment screw+setLINE OUT47 k test tapeP-4-L300(315 Hz, 0 dB)level meterAdjust RV151 (L-CH) and RV251 (R-CH) so that the reading onlevel meter meets the adjustment limits below.Adjustment Limits:LINE OUT level: 7.7 0.5 dB (0.301 to 0.338 V)Level difference between channels: within 2 dBCheck that the LINE OUT level does not change even if Playbackand Stop operation is repeated several times.Adjustment Location: AUDIO board (See page 10) 9 Record BIAS AdjustmentSetting:REC LEVEL control: Standard record position (See page 7)Set to the TEST mode (REC MEMORY mode). (See page 7)Procedure:1.Mode: RecordRecord Level AdjustmentSetting:REC LEVEL control: Standard record position (See page 7)Set to the TEST mode (REC MEMORY mode). (See page 7)Procedure:1.Mode : RecordsetAF OSCattenuator600 10 k blank tapeCS-123LINE IN1) 315 Hz2) 10 kHz50 mV ( 23.8 dB)setAF OSCattenuator600 10 k blank tapeCS-123LINE IN315 Hz, 50 mV ( 23.8 dB)2.Mode: Playback+setLINE OUT47 k recorded portionlevel meter3.Confirm playback the signal recorded in step 1 become ad-justment level as follows.4.If these levels do not adjustment level, adjust the RV152 (L-CH) and RV252 (R-CH) to repeat step 1 and 2.Adjustment Level:Playback output of 10 kHz to playbackoutput of 315 Hz: 0.5 dB.Adjustment Location: AUDIO board (See page 10)2.Mode: Playback+setLINE OUT47 k recorded portionlevel meter3.Confirm playback the signal recorded in step 1 become ad-justment level as follows.4.If these levels do not adjustment level, adjust RV153 (L-CH)and RV253 (R-CH) to repeat step 1 and 2.Adjustment Level: 23.8 0.5 dB (47 to 53 mV)Adjustment Location: AUDIO board (See page 10) 10 Adjustment Parts LocationAUDIO BOARD (Component Side)SYSTEM CONTROL BOARD (Component Side)CN714CN711IC304CN351RV151Playback Level (L-CH)RV251Playback Level (R-CH)RV252Record Bias (R-CH)RV152Record Bias (L-CH)RV153Record Level (L-CH)IC301RV253Record Level (R-CH)CN803IC803CN801TEST ModeRV801Tape Speed 11 1METER-RIDigital peak level meter signal input (R-ch)2METER-LIDigital peak level meter signal input (L-ch)3KEY-YIKey input (A/D convert input) *14KEY-XI5FWD-TABIRecord proof detection input from S902 (FWD side)“H”: Not nail6CHROM SWITape type detection input from S903“L”: Type I7RVS-TABIRecord proof detection input from S904 (REV side)“H”: Not nail8METAL SWIMetal cassette detection input from S9069PLAY SWIPlayback and stop detection input from S907“L”: Playback10TEST MODEITest mode terminalNormal: “H”Test mode: “L”11POWER OUTOAudio and mechanism power on/off output“L”: Off12POWER DETIPrimary power on/off input“H”: On13CLOSEOLoading motor (M901) drive output *214OPENO151617Not used (Fixed at “L”)18192021CLOCKOClock signal output to back-up memory (IC803)22DATAI/OData signal input/output to back-up memory (IC803)23RELAYORelay drive output“L”: On24BIASOControl output to recording bias switch (Q352)“L”: On25AU BUS-OUTOAudio bus output26AU BUS-INIAudio bus input27RESETIReset input28X CININot used (Fixed at “L”)29X COUTONot used (Open)30X INIMain system clock input (4 MHz)31XOUTOMain system clock output (4 MHz)32VssGround33REC MUTEORecording mute on/off control output“L”: Mute on34LINE MUTEOLine mute on/off control output“L”: Mute on35Not used (Fixed at “L”)36PB MUTEOPlayback mute on/off control output“L”: Mute on37REC/PBOMode control output to DOLBY NR amplifier (IC301)When recording: “L”38DOLBY B/CODOLBY B/C select signal output“L”: DOLBY C, “H”: DOLBY B39DOLBY ON/OFFODOLBY on/off select signal output“L”: DOLBY On, “H”: DOLBY Off40Not used (Open)41Not used (Open)42Not used (Open)43CD SYNCOControl output to CD SYNC LED (D851)44P17O45P16OSegment signal output to fluorescent indicator tube (FLT851)46P15O5-1.IC PIN FUNCTION DESCRIPTIONSYSTEM CONTROL BOARD IC801 M38172M4-150FP (SYSTEM CONTROL)Pin No.Pin NameI/OFunctionSECTION 5DIAGRAMS 12 Pin No.Pin NameI/OFunction47P14O48P13O49P12O50P11O51P10O52P9O53P7OSegment signal output to fluorescent indicator tube (FLT851)54P6O55P5O56P4O57P3O58P2O59P1O60G5O61G4O62G3OGrid Signal output to fluorescent indicator tube (FLT851)63G2O64G1O65TYPE 1OTape type output“H”: Normal position66TYPE 2OTape type output“H”: High position67TYPE 4OTape type output“H”: Metal position6869Not used (Fixed at “L”)7071SOLENOIDOPlunger (PM901) drive output“H”: On72CAPSTANOCapstan/reel motor (M902) drive output“H”: On73VccPower supply (+5 V)74VeeGround75AVssGround for A/D converter76VrefIReference voltage (+5 V) for A/D converter77HALFICassette half detection input from S90578AMS INIAMS input79LIMIT SWILoading detection input from S901Open: “L”, Close: “M”, COM: “H”80PULSEIRotary detection input from PH901VoltageInput port0 V0.45 V1.19 V2.19 V3.2 V3.98 V4.48 V5.0 VPin 4, KEY-XOpen/CloseSTOPPAUSEFWDREVCDNot key inputpPSYNCPin 3, KEY-YPOWERREWFFRECRESETDIRECTION DOLBY NRNot key inputON/OFF0)r*1 Key Input*2 Loading Motor (M901)INOUTBRAKECLOSE !HLHOPEN !LHH 23 NOTE: -XX and -X mean standardized parts, so theymay have some difference from the originalone. Color Indication of Appearance PartsExample:KNOB, BALANCE (WHITE) . . . (RED)Parts ColorCabinets Color Items marked “*” are not stocked since theyare seldom required for routine service. Somedelay should be anticipated when orderingthese items. The mechanical parts with no reference num-ber in the exploded views are not supplied. Hardware (# mark) list and accessories andpacking materials are given in the last of theelectrical parts list.SECTION 6EXPLODED VIEWSThe components identified by mark! or dotted line with mark ! arecritical for safety.Replace only with part numberspecified.(1) COVER, FRONT PANEL SECTIONRef. No.Part No.DescriptionRemarkRef. No.Part No.DescriptionRemark14-985-926-01 KNOB2X-3372-679-1 PANEL ASSY, FRONT34-962-708-01 EMBLEM (4-A), SONY43-939-648-01 WINDOW (TC)53-939-646-01 BUTTON (REC) (CD SYNC. r REC)63-939-645-01 BUTTON (POWER)73-939-647-01 INDICATOR (TC)84-951-620-01 SCREW (2.6X8), +BVTP93-939-653-01 LID (R-TC)103-363-099-01 SCREW (CASE 3 TP2)* 113-939-652-11 COVER* 12A-2007-717-A PANEL BOARD, COMPLETE133-939-643-01 BUTTON (FF) (0. )143-939-642-01 BUTTON (PLAY) (. . P. p)153-939-644-01 BUTTON (EJECT) (. OPEN/CLOSE)4not supplied5789101315#1#11231412notsupplied861110 24 (2) CHASSIS SECTION514-977-699-11 LEG (F)* 52A-2007-716-A SYSTEM CONTROL BOARD, COMPLETE531-773-247-11 WIRE (FLAT TYPE) (27 CORE)* 541-663-308-11 TRANS BOARD* 551-663-310-11 PRIMARY BOARD* 563-939-651-11 PANEL, BACK!571-575-651-21 CORD, POWER (AEP)!571-696-571-21 CORD, POWER (UK)* 583-703-244-00 BUSHING (2104), CORD591-696-981-11 WIRE (FLAT TYPE) (5 CORE)601-773-009-11 WIRE (FLAT TYPE) (15 CORE)* 611-663-309-11 CONNECTOR BOARD* 62A-2007-715-A AUDIO BOARD, COMPLETE634-965-822-01 FOOT* 643-350-847-21 HOLDER, PCB!T9011-431-302-11 TRANSFORMER, POWERRef. No.Part No.DescriptionRemarkRef. No.Part No.DescriptionRemarkThe components identified by mark! or dotted line with mark ! arecritical for safety.Replace only with part numberspecified.#1not supplied6362#2585757565554not supplied616059TCM-9700HLDT901AEPUK#2#1#864#25164not supplied6452#153#1 25 (3) MECHANISM DECK SECTION-1(TCM-9700HLD)notsupplied103104105106107108109106110111101102#4#3S901M901Ref. No.Part No.DescriptionRemarkRef. No.Part No.DescriptionRemark101A-2004-430-A TRAY (A) ASSY102A-2004-429-A CLAMP (B) ASSY1033-917-502-01 SCREW (2X8), +BTT1043-917-501-01 SPRING, TOGGLE1053-917-498-01 SCREW (2.6X6), +BTT1063-917-497-01 SCREW (2.6X5), +BTT1073-917-499-01 BELT108X-3369-090-1 GEAR ASSY1093-918-629-01 SPRING (A), COMPRESSION1103-918-630-01 WASHER, FLAT1113-917-496-01 CHASSIS (MAIN)M901X-3369-091-1 MOTOR ASSY (LOADING)S9011-762-989-11 SWITCH, ROTARY (LOADING DET) 26 (4) MECHANISM DECK SECTION-2(TCM-9700HLD)170169168167166165164163162174162176177not suppliednot supplied178155180181not suppliednot supplied185#5186PM901#5#6151152153#6#6notsupplied154not suppliednot supplied158159155157156155160161HRPE901155165173172171179183184182Ref. No.Part No.DescriptionRemarkRef. No.Part No.DescriptionRemark151A-2004-436-A GEAR ASSY, PLAY1523-917-549-01 ARM, PLAY1533-917-553-01 SPRING (PLAY ARM), TOGGLE1543-917-566-01 SCREW (2X6), +PTT1553-917-565-01 SCREW (2X4), +PTT1563-917-558-01 WASHER, POLY-SLIDER1573-917-561-01 WASHER, NYLON1583-917-556-01 SPRING (P ROLLER ARM R), TOGGLE159A-2004-434-A ARM (R) ASSY, P ROLLER1603-917-533-01 SCREW (HEAD RVS)1613-917-532-01 CLAMP, HEAD WIRE1623-917-537-01 SPRING (TAPE GUIDE), COMPRESSION1633-917-539-01 GUIDE (R), TAPE1643-917-524-01 SPRING (AZIMUTH)1653-917-541-01 SCREW (2X5)1663-917-531-01 SCREW (AZIMUTH)1673-917-528-01 GEAR (RETURN)1683-917-526-01 COLLAR1693-917-536-01 SCREW (POWER LOCK)1703-917-530-01 SPRING (RETURN), TOGGLE1713-917-534-01 WASHER, POLY-SLIDER1723-917-527-01 GEAR (ROTATION)1733-917-540-01 WASHER, POLY-SLIDER1743-917-538-01 GUIDE (L), TAPE1763-917-529-01 GUIDE (CASSETTE)177X-3369-095-1 PLATE ASSY, HEAD178A-2004-435-A ARM (L) ASSY, P ROLLER1793-917-557-01 SPRING (P ROLLER ARM L), TOGGLE1803-917-562-01 WASHER, NYLON1813-917-559-01 WASHER, POLY-SLIDER1823-917-555-01 SPRING (HEAD CHASSIS H), TOGGLE1833-917-554-01 SPRING (SHIFT H), TOGGLE1843-917-550-01 ARM, SELECT1853-917-547-01 LEVER, SHIFT1863-917-568-01 WASHER, POLY-SLIDERHRPE9011-500-156-11HEAD (RECORD) (REC/PB/ERASE)PM9013-917-560-01 SOLENOID 27 (5) MECHANISM DECK SECTION-3(TCM-9700HLD)217218210211212213214213215216notsuppliedM902219notsupplied#5#5#7223222221220225228230229227226231221232233220234236235237#6not supplied202203204205206203207208209215211212notsupplied219224221201Ref. No.Par