Sony-TCKE240-tape-sm 维修电路原理图.pdf

SERVICE MANUALSTEREO CASSETTE DECKAEP ModelTC-KE240/RE340UK ModelTC-KE240E ModelAustralian ModelTC-RE340SPECIFICATIONSTC-KE240/RE340Photo: TC-RE340 (Black type)Dolby noise reduction and HX Pro headroom ex-tension manufactured under license from DolbyLaboratories Licensing Corporation.HX Pro originated by Bang & Olufsen.“DOLBY”, the double-D symbol ;, and “HX PRO”are trademarks of Dolby Laboratories Licensing Cor-poration.Model Name Using Similar MechanismNEWTape Transport Mechanism TypeKE240TCM-230ASV1RE340TCM-230ASR4N Continued on next page SystemRecording system4 track 2 channel stereoFast-winding time (approx.)100 sec. (with Sony C 60 cassette)BiasAC biasSignal-to-noise ratio (at peak level and weighted with DolbyNR off)Type I tape, Sony Type I (NORMAL): 55 dBType II tape, Sony Type II (HIGH): 57 dBType IV tape, Sony Type IV (METAL): 58 dBS/N ratio improvement (approximate values)With Dolby B NR on: 5 dB at 1 kHz, 10 dB at 5 kHzWith Dolby C NR on: 15 dB at 500 Hz, 20 dB at 1 kHzHarmonic distortion0.4% (with Type I tape, Sony Type I (NORMAL):160 nWb/m 315 Hz, 3rd H.D.)1.8% (with Type IV tape, Sony Type IV (METAL):250 nWb/m 315 Hz, 3rd H.D.)Type I tape, Sony Type I(NORMAL)30 15,000 Hz (3 dB, IEC),20 16,000 Hz (6 dB)Type II tape, Sony Type II(HIGH)30 16,000 Hz (3 dB, IEC),20 17,000 Hz (6 dB)Type IV tape, Sony Type IV(METAL)30 18,000 Hz (3 dB, IEC),20 19,000 Hz (6 dB),30 13,000 Hz (3 dB, 4 dBrecording)Frequency response (Dolby NR off)Tape typeInputsLine inputs (phono jacks)Sensitivity: 0.16 VInput impedance: 47 kilohmsRadioFans.CN 收音机爱 好者资料库2SAFETY-RELATED COMPONENT WARNING!COMPONENTS IDENTIFIED BY MARK 0 OR DOTTEDLINE WITH MARK 0 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.Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be dam-aged by heat.OutputsLine outputs (phono jacks)Rated output level: 0.5 V at a load impedance of47 kilohmsLoad impedance: Over 10 kilohmsHeadphones (stereo phone jack)Output level: 0.25 mW at a load impedance of32 ohmsGeneralPower requirementsEurope and certain countries in Asia: 220 230 V AC, 50/60 HzAustralia: 240 V AC, 50/60 HzOther countries: 110 120/220 240 V AC, 50/60 HzPower consumptionTC RE340: 15 WTC KE240: 14 WDimensions (approx.) (w/h/d)430 120 290 mmMass (approx.)3.3 kgSupplied accessoriesAudio connecting cords (2)Design and specifications are subject to change without notice.RadioFans.CN 收音机爱 好者资料库3SECTION 1SERVICING NOTETABLE OF CONTENTS1.SERVICING NOTE.32.GENERAL.43.DISASSEMBLY.54.MECHANICAL ADJUSTMENTS. 105.SERVICE MODE. 116.ELECTRICAL ADJUSTMENTS. 127.DIAGRAMS7-1.Note for Printed Wiring Boards andSchematic Diagrams . 157-2.Printed Wiring Boards HEAD RELAY (REC/PB)/LEAF SW (REC/PB) Boards . 187-3.Printed Wiring Board MAIN Board . 197-4.Schematic Diagram MAIN Section (1/2) . 207-5.Schematic Diagram MAIN Section (2/2) . 217-6.Printed Wiring Boards TRANS/POWER SW Boards . 227-7.Schematic Diagram TRANS/POWER SW Boards . 237-8.Printed Wiring Board DISPLAY Board . 247-9.Schematic Diagram DISPLAY Board . 257-10. Printed Wiring Boards KEY/HP Boards . 267-11. Schematic Diagram KEY Board . 267-12. IC Pin Function Description . 288.EXPLODED VIEWS. 309.ELECTRICAL PARTS LIST. 33MODEL IDENTIFICATION BACK PANEL Part No.ModelPart No.TC-KE240AEP model3-042-502-0sUK model3-042-502-1sAEP model3-042-490-0sTC-RE340Australian model3-042-490-1sSingapore model3-042-490-2s4SECTION 2GENERAL1qaqdqfqgqkw;qjqlwawdqhwsqs234806579OM XIERDOLBY NRBALANCEAU O CAREC LEVEL0345890CBBPHONESL RAU OREC MU INGRECAUSERESETMEMORYPOWERDIRECT ON MODEEJECTS NCHROFADERARLAMS1Fluorescent indicator tube2Cassette holder3m button4SYNCHRO button and indicator5H button (TC-KE240)h, H buttons (TC-KE340)6FADER button7ARL button8M button9AUTO REC LEVEL indicator0RED LEVEL knobqaPOWER buttonqsDIRECTION MODE buttonqdRESET buttonqfMEMORY buttonqgEJECT buttonqhx buttonqjAUTO CAL button (TC-RE340)qkX buttonqlDOLBY NR knobw;W buttonwaBALANCE knobwsz buttonwdPHONES jack LOCATION OF CONTROLS Front Panel 51wire (flat type)(CN302)1wire (flat type)(CN801)6claw6claw7front panelsection5three screws(BVTP3 8)5screw(BVTT3 6)3screw(BVTT3 6)4harness2connector(CN802)2connector(CN702)2two connectors(CN301, CN803)CASE (410726)FRONT PANEL SECTIONNote: Follow the disassembly procedure in the numerical order given.SECTION 3DISASSEMBLY1two screws(case 3 TP 2)3case (410726)2screw (BVTT3 6)1two screws(case 3 TP 2)6MECHANISM DECK(TCM-230ASV1: KE240)(TCM-230ASR4N: RE340)MAIN BOARD3four screws(BVTP2.6 8)2lid (cassette) assy1Push the button (eject).4mechanism deck(TCM-230ASV1: KE240)(TCM-230ASR4N: RE340)4screw (BVTP3 8)2screw (BVTP3 8)1connector(CN701)5main board3bracket (TR)7CASSETTE HOLDER (L) ASSYCAPSTAN MOTOR ASSY, LEAF SW BOARD5screw (BVTT2 4)3screw (BVTT2 4)9two screws(BVTT2 5)6fulcrum plate (R)8cassette holder (L) assy4fulcrum plate (L)7loading spring (L)2lever (LOCK L)1step screwq;damper4screw (PS2.6 6)1two solders6leaf SW board7belt (capstan)5two claws5claw3capstan motor assy (M1002)4screw(PS2.6 6)2two screws(PS2.6 6)8PINCH LEVER ASSYFLYWHEEL ASSY1claw2pinch lever (FWD) assy4pinch lever(REV) assy3clawRE3403flywheel (FWD) assy6flywheel (REV)assy7washer4washer2stopper washer5stopper washer1belt (FR2)RE340RE3409MECHANICAL BLOCK ASSY (AMS)HEAD BASE ASSY (KE240), HEAD DECK ASSY (RE340),HEAD RELAY BOARD2two screws(BVTT2 3.5)2two screws(BVTT2 3.5)3mechanical block assy(AMS)4reverseslider1torsion springRE3401screw (BVTT2 4)2head relay (REC/PB)board4head base assy (KE240),head deck assy (RE340)3tension spring (HEAD)10SECTION 4MECHANICAL ADJUSTMENTS1.Clean the following parts with a denatured-alcohol-moistenedswab:record/playback/erase headpinch rollerrubber beltcapstanidler2.Demagnetize the playback head with a head demagnetizer.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 power supplyvoltage unless otherwise noted. Torque MeasurementModeTorque MeterMeter Reading 2.74 6.86 mNmForwardCQ-102C(28 69 gcm)(0.42 0.90 ozinch)Forward0.1 0.59 mNmCQ-102C(1.1 6.0 gcm)Back Tension(0.01 0.06 ozinch)2.74 6.86 mNmReverseCQ-102RC(30 69 gcm)(0.42 0.90 ozinch)Reverse0.1 0.59 mNmCQ-102RC(1.1 6.0 gcm)Back Tension(0.01 0.06 ozinch)6.86 15.68 mNmFF, REWCQ-201B(70 159 gcm)(0.83 2.78 ozinch)11SECTION 5SERVICE MODEKey Check & Display Check Mode1.While pressing two buttons of SYNCHRO andREC MUTING , press the POWER button to turn thepower ON.2.Enter the test mode and display as figure 1.3.Each time some button is pressed or switch position is selected,the fluorescent indicator tube displays as following table.Button or SwitchDisplayRESETrefer to figure 2MEMORYrefer to figure 3SYNCHROall segments (refer to figure 4)FADER0 (refer to figure 5)ARL1m2h *13H4M5x6PAUSE X7REC MUTING W8REC z9AUTO CAL *1AMPX FILTER CDOLBY NR CMPX FILTER BDOLBY NR BOFFno indicationCCBB*1) TC-RE340 onlyWDolby NRswitchdB201040+2+4+6+830 LR;figure 1dB201040+2+4+6+830 LRI;figure 2dB201040+2+4+6+830 LR;figure 3TAPE TYPEdB201040+2+4+6+830 LRPLAYRECDOLBY NRMAUTOCALIIIIVBC88 88;figure 4dB201040+2+4+6+830 LR0;figure 5number indication12SECTION 6ELECTRICAL ADJUSTMENTSNote: The adjustments should be performed in the order given in the ser-vice manual. As a rule, adjustments about playback should be per-formed before those about recording.The adjustments should be performed for both L-CH and R-CH. Switches and controls should be set as follows unless otherwisespecified.DOLBY NR, MPX FILTER switch: OFFDIRECTION MODE switch: g Standard Record:Deliver the standard input signal level to the input jack and setthe REC LEVEL volume to obtain the standard output signallevel as follows. Record Mode Standard Input Levelinput terminalLINE INsource impedance10 kinput signal level0.5 V (3.8 dB)Standard Output Leveloutput terminalLINE OUTload impedance47 koutput signal level0.5 V (3.8 dB)Test TapeTypeSignalUsed forP-4-A10010 kHz, 10 dBAzimuth AdjustmentP-4-L300315 Hz, 0 dBPlayback Level AdjustmentWS-48B3 kHz, 0 dBTape Speed AdjustmentTest Mode1.While pressing two buttons of ARL and REC MUTING ,press the POWER button to turn the power on.2.All segments of the fluorescent indicator tube are light up forabout one second, and the test mode is set.The test mode has a special function as bellow. Counter RESET & MEMORY Function(1)Press the RESET button to reset the counter.(2)Press the REC button then theHbutton to startsrecording.(3)After record, press thexbutton to stop recording.(4)Press thembutton to rewind the tape.(5)Rewinding tape is automatically stopped at the pointwhere recording was started.3.To release the test mode, press the POWER button to turnthe power off.Record/Playback Head Azimuth AdjustmentProcedure:1.Mode: FWD playback2.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.3.Phase CheckMode: playback4.Change the REV playback mode and repeat the steps 1 to 3.(TC-RE340 only)5.After the adjustment, lock the screw with locking compound.Adjustment Location: record/playback head (See page 13)ScrewpositionL-CHpeakwithin1dBoutputlevelL-CH peakR-CH peakwithin1dBangleR-CHpeak+VH+Screen patternGoodWrongin phase 4590135180LINE OUT jack (J301)setR-CHL-CH47 k 47 k oscilloscopetest tapeP-4-A100(10 kHz, 10 dB)0 dB=0.775 V+set47 k LINE OUTjackLINE INjack600 10 k attenuatorAF OSClevel meterJ301Wz+set47 k LINE OUT jack (J301)level meterTest tapeP-4-A100(10 kHz, 10 dB)13Tape Speed AdjustmentProcedure:Mode: playback1.Set to the test mode (See page 12).2.Press theHbutton to playback.3.Adjust RV301 so that the frequency counter reading becomes3,00090 Hz.4.Frequency difference between the beginning and the end ofthe tape should be within 3%.Adjustment Location: MAIN board (See page 14)Sample value of Wow and Flutter: 0.3% or less W.RMS (JIS)(WS-48B)Playback Level AdjustmentProcedure:Mode: playbackAdjust RV121 (L-CH) and RV221 (R-CH) so that the reading onlevel meter meets the adjustment limits below.Adjustment Limits:LINE OUT level: 7.70.5 dB (0.301 to 0.338 V)Level difference between channels: within 0.5 dBCheck that the LINE OUT level does not change even if playbackand stop operation is repeated several times.Adjustment Location: MAIN board (See page 14)+setLINE OUT jack (J301)frequency countertest tapeWS-48B(3 kHz, 0 dB)47 k +setLINE OUT jack (J301)47 k test tapeP-4-L300(315 Hz, 0 dB)level meterBias Consumption Current Adjustment (TC-RE340 only)Procedure:1.Set RV141 (L-CH) and RV241 (R-CH) to mechanical centerand turn the set recording mode.2.Connect digital voltmeter as shown by the following table.3.Press the H button to playback.4.Adjust the following transformers for the minimum readingson the digital voltmeter.Measurement PointAdjustment PartValueL-CHTP301 pin 2 and 3T101minimumR-CHTP301 pin 1 and 2T201Specified value: Maximum 220 mVAdjustment Location: MAIN board (See page 14)Record Bias AdjustmentSetting:REC LEVEL volume: standard record position (See page 12)Procedure:Mode: record and playback1.Set to the test mode (See page 12).2.Press the REC button then theHbutton to start record-ing.3.Press thexbutton to stop recording and press theHbuttonto playback.4.Adjust TC-KE240: RV142 (L-CH) and RV242 (R-CH), TC-RE340: RV141 (L-CH) and RV241 (R-CH) so that 10 kHzplayback output is 00.3 dB relative to the 315 Hz output.Adjustment Location: MAIN board (See page 14)+setLINE IN jack (J301)(no signal)TP301321L-CHR-CH47 kdigital voltmeterCS-413 blank tapeset47 k AF OSCAttenuatorLINE IN jack (J301)315 Hz10 kHz50 mV (23.8 dB)600 10 k CS-123blank tapeLINE OUT jack (J301)level meter+TC-KE240TC-RE340adjustment screwadjustment screwzAdjustment Location: record/playback head14Record Level AdjustmentSetting:REC LEVEL volume: standard record position (See page 12)Procedure:Mode: record and playback1.Set to the test mode (See page 12).2.Press the REC button then theHbutton to start record-ing.3.Press thexbutton to stop recording and press theHbuttonto playback.4.Adjust RV101 (L-CH) and RV201 (R-CH) so that the readingon level meter meets the adjustment limits below.Adjustment Limits: 23.80.5 dB (47.2 to 53 mV)Adjustment Location:set47 k AF OSCAttenuator600 10 k CS-123blank tapeLINE OUT jack (J301)level meterLINE IN jack (J301)315 Hz, 50 mV (23.8 dB)+zRecord BiasAdjustmentRV242 (R-CH)RV142 (L-CH)(TC-KE240) MAIN BOARD (Component Side) RV301Tape Speed AdjustmentT101L-CHT201R-CHBias ConsumptionCurrent AdjustmentLINEOUTLINEINJ301Record LevelAdjustmentRV201 (R-CH)RV101 (L-CH)Playback LevelAdjustmentRV221 (R-CH)RV121 (L-CH)Record BiasAdjustmentRV141 (L-CH)RV241 (R-CH)TP30131(TC-RE340)15SECTION 7DIAGRAMSNote on Schematic Diagram: All capacitors are in F unless otherwise noted. pF: F50 WV or less are not indicated except for electrolyticsand tantalums. All resistors are in and 1/4 W or less unless otherwisespecified.%: indicates tolerance.f: internal component. 5 : fusible resistor. C : panel designation. U : B+ Line. V : B Line. H : adjustment for repair. Voltages and waveforms are dc with respect to groundunder no-signal conditions.no mark : STOP() : PB : REC: Impossible to measure Voltages are taken with a VOM (Input impedance 10 M).Voltage variations may be noted due to normal produc-tion tolerances. Waveforms are taken with a oscilloscope.Voltage variations may be noted due to normal produc-tion tolerances. Circled numbers refer to waveforms. Signal path.E: PBa: REC AbbreviationSP: Singapore modelAUS: AustralianNote: The components identified by mark 0 or dotted linewith mark 0 are critical for safety.Replace only with part number specified.Note on Printed Wiring Boards: X : parts extracted from the component side. Y : parts extracted from the conductor side. b : Pattern from the side which enables seeing.7-1.NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS16 Circuit Boards LocationTRANS boardMAIN boardLEAF SW boardPOWER SW boardDISPLAY boardHEAD RELAY boardKEY boardHP board17 Waveforms MAIN BOARD 1 IC801 el (EXTAL)2 IC801 eg (SHUT) (REC or PB mode)3 IC331 7, 8, qa, qs, (REC mode)(TC-RE340)4 Q332 (Base) (REC mode)5 Q332 (Collector) (REC mode)6 Q333 (Base) (REC mode)7 Q333 (Collector) (REC mode)8 IC801 4 (XIN)4.3 Vp-p10 MHz6.5 Vp-p580 ms4.3 Vp-p9.8 s 28 Vp-p9.8 s7 Vp-p9.8 s2.8 Vp-p330 ns3.5 Vp-p9.8 s 28 Vp-p9.8 s18TC-KE240/RE3407-2.PRINTED WIRING BOARDS HEAD RELAY (REC/PB)/LEAF SW (REC/PB) Boards See page 16 for Circuit Boards Location.175405AMAIN BOARDCN30105B(PLAY)MAIN BOARDCN302(Page 19)(Page 19)1919TC-KE240/RE340D341D-9D351E-1D352E-1D601G-7D701G-1D702G-1D703G-1D704G-1D705F-1D706F-1D707F-1D708G-5D709G-5D710G-2D711G-4D712F-2D713E-2D714F-2D715F-3D716F-1D717F-3IC301D-7IC302G-6IC303E-9IC304A-6IC305A-5IC306D-1IC331B-8IC701G-3IC801C-3IC802B-4Q101E-5Q102G-8Q104C-6Q201E-6Q202