Sony-TCEX66-tape-sm 维修电路原理图.pdf

MICROFILMTC-EX66STEREO CASSETTE DECKSERVICE MANUALThis set is the cassette deck sectionin MHC-EX66.Dolby noise reduction manufactured under licensefrom Dolby Laboratories Licensing Corporation.“DOLBY” and the double-D symbol a are trademarksof Dolby Laboratories Licensing Corporation.SPECIFICATIONSModel Name Using Similar MechanismNEWTape Transport Mechanism TypeTCM-ACLM578AEP ModelUK ModelE ModelRadioFans.CN 收音机爱 好者资料库 2 TABLE OF CONTENTSServicing Notes . 21.GENERALPlaying a Tape .3Recording on a Tape Manually.4Recording the favorite CD Tracks on a Tape.52.DISASSEMBLY.63.MECHANICAL ADJUSTMENTS. 104.ELECTRICAL ADJUSTMENTS. 105.DIAGRAMS5-1.Printed Wiring Boards . 155-2.Schematic Diagram . 195-3.IC Pin Function . 256.EXPLODED VIEWS. 277.ELECTRICAL PARTS LIST. 32SERVICING NOTESHow to operate with a single unit.Normally, this set is not operated with its own.The exclusive jig (J-2501-078-A) and service box (PFJ-1) are nec-essary to operate the set with a single unit.Turn the power set of the service box ON. Then press theENTER/NEXT button and SLEEP button at the same time toturn the power on.Connection: KEY/FL tube/LED check mode.To enter KEY/FL tube/LED check mode, press the ENTER/NEXTand REC buttons at the same time.Under mode, every time when press any key or turnMULTI CONTROLLER knob, change to next situation.1 All LED indicators light on2 All FL tube indicators light on3 A part of FL tube light on mode 1. (Indicated ST-SEG)4 A part of FL tube light on mode 2. (Indicated RDS-SEG)5 KEY check modeNote:1) All LED light on mode is kept, when buttons which is pressedto enter all LED light on mode, release same time.When release them separate timing, it is moved to next AllLED light on mode.2) After all LED light on mode, light on point remove one by one,when any button pressed or MULTI CONTROLLER knobturned.3) Under KEY check mode, every time buttons pressed numeri-cal value of “KEY” in FL tube increase.And that time, numerical value of “ECDR” increase whenMULTI CONTROLLER button turn to + direction, and itdecrease turn to direction.When you want to finish this mode, unplug the power of amplifieror turn off PFJ-1 of POWER switch.POWER SWFH-E939, 838,937CDP/TCCN90417PCN9027PCN101 7PJIG (J-2501-078-A)SERVICE BOX (PFJ-1)SETSYSTEM CONTROLCORD WITH CONNECTOR 7P(attached to set)CORD WITH CONNECTOR 17P(attached to PFJ-1)RadioFans.CN 收音机爱 好者资料库 3 This section is extractedfrom instruction manual.SECTION 1GENERAL 4 5 6 SECTION 2DISASSEMBLY This set can be disassembled in the order shown below.Note: Follow the disassembly procedure in the numerical order given.CASE, FRONT PANELCASE, FRONT PANEL(Page 6)MECHANISM DECK(Page 7)MAIN BOARD(Page 7)MECHANISMCHASSIS SECTION(Page 8)TRY ASSY(Page 8)CAPSTAN MOTOR(Page 9)1two screws(case TP2)3flat cable(5 core)(CN301)5two screws(BVTP 3 8)5 screw(BVTP3 8)6 three claws7 front panel4 flat cable(27 core)(CN802)1 two screws(case 3 TP 2)2case8lid (R-TC) 7 MECHANISM DECK2four screws(BVTP3 8)3mechanism deck1two connectors(CN803, 804)1connector(CN351)MAIN BOARD2three connectors(CN351, 803, 804)3two screws(BVTP3 8)1Slide the tray todeviation of the arrow A.A5two PCB holders4two screws(BVTP3 10)6main board 8 TRAY ASSY1screw(M1.7 8.2)4arm 5765tray assy3boss2tension springMECHANISM CHASSIS SECTION3mechanism chassis section2screw (P3 8)1four screws(BK3 6) 9 CAPSTAN MOTOTR7capstan motor5Hang the belt.6three motorscrews.4Remove the solderof motor lead wire.1step screw3control board2two claws2two claws 10 SECTION 4ELECTRICAL ADJUSTMENTSPRECAUTION1.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 meterModeTorque 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)SECTION 3MECHANICAL 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 power sup-ply voltage unless otherwise noted.Torque MeasurementStandard 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 VTest ModeWith the POWER turned OFF, short the test point CN801 (2P) onthe MAIN board (making IC801 pin & “L”) and turn the POWERON. 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. 11 Record/Playback Head Azimuth AdjustmentProcedure:1.Mode: REV 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.+setLINE OUTfrequency countertest tapeWS-48B(3 kHz, 0 dB)47 k 1. Set to FWD playback mode.2. Adjust Variable resistor on the motor (M902) so that the fre-quency counter reading becomes3,000 90 Hz.3. Confirm that the deviation between tape top and tape end iswithin 3%.Adjustment Location: CAPSTAN/REEL motor (M902)ScrewpositionL-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+set47 k LINE OUTlevel metertest tapeP-4-A100(10 kHz, 10 dB)Tape Speed AdjustmentProcedure:Mode: FWD playbackM902adjustable resistorSample Value of Wow and flutter: 0.3% or less W. RMS(WS-48B) 12 Record Level AdjustmentSetting:REC LEVEL control: Standard record position (See page 10)set to the TEST mode (REC MEMRY mode) (See page 10)Procedure:1.Mode :Record+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: MAIN board (See page 13)Playback Level AdjustmentProcedure:Mode: FWD playbackRecord BIAS AdjustmentSetting:REC LEVEL control: Standard record position (See page 10)Set to the TEST mode (REC MEMRY mode) (See page 10)Procedure:1.Mode: RecordsetAF OSCattenuator600 10 k blank tapeCS-123LINE IN1) 315 Hz2) 10 kHz50 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: MAIN board (See page 13)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 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: MAIN board (See page 13) 13 Adjustment Parts LocationCN801TEST ModeRV152Record BIAS (L-CH)RV252Record BIAS (R-CH)RV253Record Level (R-CH)RV153Record Level (L-CH)RV151Playback Level (L-CH)RV251Playback Level (R-CH)J301CN11MAIN BOARD (Component Side) 14 IC Block Diagrams12345678910161514131211GPGLGHIREFVCCIN(R)GND(R)OUT(R)IN(L)GND(L)OUT(L)f/QfQfMREFGNDVEECONTROLEQEQ12345678910GNDMOTORDRIVENOISEFILTERCLAMPFWD.INREV.INVCC 1VCC 2NOISEFILTERMOTORDRIVEMOTORDRIVEMOTORDRIVET.S.DO.C.PFWD/REV/STOPCONTROL LOGICIC304CXA1198APIC804LB1641ON/OFFCURRENTLIMITERSTARTCIRCUITVREFOVER HEATPROTECTON/OFFCURRENTLIMITER12345678910VCCVMUTEVCCVREFERRORAMPVREFERRORAMPVO1VCCCN1ENEN DISPLAYGNDNCCN2VEEVO2 _1.8V _140uACOMPARATERIC805LA5617SECTION 5DIAGRAMS 25 1PULSEIPulse signal input2NO-USENot used (Fixed at “L”)3METER-LIDigital peak level meter signal input (L-ch)4METER-RIDigital peak level meter signal input (R-ch)5AD-GNDGround for A/D converter6TESTINot used (Fixed at “L”)7NO-USENot-used (Open)8NO-USENot-used (Fixed at “L”)9SYS-GNDGround for system10OSC-OUTOSystem clock output (4 MHz)11OSC-INISystem clock input (4 MHz)12RESETIReset signal input13AUB-INIAudio bus input14AUB-OUTOAudio bus output15NO-USENot used (Fixed at “L”)16NO-USENot used (Fixed at “L”)17NO-USENot used (Fixed at “L”)18NO-USENot used (Fixed at “L”)19NO-USENot used (Fixed at “L”)20DOLBY C/BODOLBY B/C select signal output “L”: DOLBY B, “H”: DOLBY C21DOLBY ON/OFFODOLBY on/off select signal output “L”: DOLBY off, “H”: DOLBY on22CDSYNC-LEDOControl output to CD SYNC LED (D851)23SEG17OSegment signal output to fluorescent indicator tube (FLT851)24SEG16OSegment signal output to fluorescent indicator tube (FLT851)25SEG15OSegment signal output to fluorescent indicator tube (FLT851)26SEG14OSegment signal output to fluorescent indicator tube (FLT851)27SEG13OSegment signal output to fluorescent indicator tube (FLT851)28SEG12OSegment signal output to fluorescent indicator tube (FLT851)29SEG11OSegment signal output to fluorescent indicator tube (FLT851)30SEG10OSegment signal output to fluorescent indicator tube (FLT851)31SEG9OSegment signal output to fluorescent indicator tube (FLT851)32SEG8OSegment signal output to fluorescent indicator tube (FLT851)33SEG7OSegment signal output to fluorescent indicator tube (FLT851)34SEG6OSegment signal output to fluorescent indicator tube (FLT851)35SEG5OSegment signal output to fluorescent indicator tube (FLT851)36SEG4OSegment signal output to fluorescent indicator tube (FLT851)37SEG3OSegment signal output to fluorescent indicator tube (FLT851)38SEG2OSegment signal output to fluorescent indicator tube (FLT851)39SEG1OSegment signal output to fluorescent indicator tube (FLT851)40FL-GNDIGround for fluorescent indicator tube (Fixed at “L” (20 V)41GRID 1OGrid signal output to fluorescent indicator tube (FLT851)42GRID 2OGrid signal output to fluorescent indicator tube (FLT851)43GRID 3OGrid signal output to fluorescent indicator tube (FLT851)44GRID 4OGrid signal output to fluorescent indicator tube (FLT851)45GRID 5OGrid signal output to fluorescent indicator tube (FLT851)5-3.IC PIN FUNCTION DESCRIPTION MAIN BOARD IC801HD6433724E66F (SYSTEM CONTROL)Pin No.Pin NameI/OFunction 26 46NO-USENot used (Open)47NO-USENot used (Open)48NO-USENot used (Open)49TYPE IVOTape type output “H”: Metal Position50TYPE IIOTape type output “H”: High position51TYPE IOTape type output “H”: Normal position52REC MUTEORecording mute on/off control output “H”: Mute on53RELAYORelay drive output “H”: On54NCNot used (Open)55REC/PBOMode control output to DOLBY NR amplifier (IC301) “L”: Record56PB MUTEOPlayback mute on/off control output “H”: Mute on57SYS-VCCIPower supply for system58OPTIONONot used (Fixed at “L”)59NO-USENot used (Fixed at “L”)60POWER-OUTOAudio and mechanism power on/off output “H”: On61BIASOControl output to recording bias switch (Q352) “L”: On62POW-INIPrimary power on/off input “H”: On63CLOSE SWIClose detection input from S901 “L”: Close64OPEN-SWIOpen detection input from S902 “L”: Open65SOLENOIDEOPlunger (PMxxx) drive output “H”: On66LINE-MUTEOLine mute on/off control output “L”: Mute on67CHORM-SWITape type detection input from Sxxx “L”: Type I68METAL-SWITape type detection input from Sxxx “L”: Type IV69REC-REV-SWIRecord proof detection input from Sxxx (REV side) “H”: Not nail70REC-FW-SWIRecord proof detection input from Sxxx (FWD side) “H”: Not nail71CAPSTANOCapstan/reel motor (M902) drive output “H”: On72CLOSEOLoading motor (M901) drive output *173OPENOLoading motor (M901) drive output *174TESTITest mode terminal75MODE-SWIHead sensor input from Sxxx76AD-VCCIPower supply for A/D converter77KEY 1IKey input (A/D convert input)*278KEY 2IKey input (A/D convert input)*279HALF-SWICassette half detection input from Sxxx80AMS-INIAMS inputPin No.Pin NameI/OFunction*1 Loading Motor (M901)INOUTBRAKECLOSE &HLHOPEN &LHHVoltageInput port0 V0.45 V1.19 V2.19 V3.2 V3.98 V4.48 V5.0 VPin &, KEY 2Open/CloseSTOPPAUSEFWDREVCDNot key inputpPSYNCPin &, KEY 1POWERREWFFRECRESETDIRECTION DOLBY NRNot key inputON/OFF0)r*2 Key Input 27 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 is given in the last ofthe electrical parts list.SECTION 6EXPLODED VIEWSRef. No.Part No.DescriptionRemarkRef. No.Part No.DescriptionRemark14-985-926-01 KNOB2X-3373-604-1 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)63-939-647-01 INDICATOR (TC)74-951-620-01 SCREW (2.6X8), +BVTP83-012-560-01 BUTTON (EJECT) ( OPEN/CLOSE)93-939-642-01 BUTTON (PLAY) (, , p)103-939-643-01 BUTTON (FF) (0, )* 11A-2007-722-A PANEL BOARD, COMPLETE121-782-490-11 WIRE (FLAT TYPE) (5 CORE)131-773-257-11 WIRE (FLAT TYPE) (27 CORE)143-012-561-01 LID (R-TC)153-363-099-01 SCREW (CASE 3 TP2)* 163-939-652-11 CASE(1) CASE, FRONT PANEL SECTION3notsuppliednotsupplied56421#1#189107111213141516157notsupplied 28 (2) CHASSIS SECTIONTCM-ACLM578#1#155#2#2#2545251#2notsuppliedRef. No.Part No.DescriptionRemarkRef. No.Part No.DescriptionRemark514-977-699-11 LEG (F)524-965-822-01 FOOT* 533-350-847-31 HOLDER, PCB* 54A-2007-721-A MAIN BOARD, COMPLETE* 553-012-563-02 PANEL, BACKnot supplied53 29 (3) MECHANISM DECK SECTION-1(TCM-ACLM578)1013-017-214-01 HOLDER1023-017-215-01 ARM (A)1033-017-233-01 RACK, GEAR1043-017-216-01 AR