Sony-TCTX77-tape-sm维修电路原理图.pdf

MICROFILM TC-TX77 STEREO CASSETTE DECK SERVICE MANUALAEP Model UK Model Model Name Using Similar MechanismTC-S1 Tape Transport Mechanism TypeTCM-9700HLD SPECIFICATIONS Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation. “DOLBY” and the double-D symbol a are trademarks of Dolby Laboratories Licensing Corporation. RadioFans.CN 收音机爱 好者资料库 2 TABLE OF CONTENTS 1.GENERAL.3 2.DISASSEMBLY. 4 3.MECHANICAL ADJUSTMENTS.7 4.ELECTRICAL ADJUSTMENTS. 7 5.DIAGRAMS 5-1.IC Pin Function Description. 11 5-2.Printed Wiring Boards . 13 5-3.Schematic Diagram . 17 6.EXPLODED VIEWS. 23 7.ELECTRICAL PARTS LIST. 28 SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- LISHED BY SONY. RadioFans.CN 收音机爱 好者资料库 3 SECTION 1 GENERAL This section is extracted from instruction manual. 4 SECTION 2 DISASSEMBLY This set can be disassembled in the order shown below. 2 Note: Follow the disassembly procedure in the numerical order given. COVER, FRONT PANEL SECTION AUDIO/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 claws 3wire (flat type) (27 core) (CN802) 6front panel section 5three claws 4two screws (BVTP3 8) 2Remove the cover to direction of the arrow. 5 MECHANISM DECK (TCM-9700HLD) AUDIO/CONNECTOR BOARD, POWER TRANSFORMER (T901) 4lag 5mechanism 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 board 3wire (flat type) (15 core) (CN711) 2connector (CN351) 1power cord (CN901) 5connector (CN701) 7two connectors (CN713, 715) 4four screws (BVTT3 6) 6 TRAY (A) ASSY MOTOR (HK) ASSY (M902) 2two claws A tray 3tray (A) assy tray (A) assy 1Rotate the gear assy in direction arrow A to up the tray. 1six screws (BVTT2.6 8) 5three step screws (MOTOR) 6motor (HK) assy (M902) 3Remove the belt to position figure the hang. 2mechanism deck 4Remove the solders of motor (M902). 7 SECTION 3 MECHANICAL ADJUSTMENTS SECTION 4 ELECTRICAL ADJUSTMENTS PRECAUTION 1.Clean the following parts with a denatured-alcohol-moistened swab: record/playback/earth headpinch roller rubber beltscapstan idlers 2.Demagnetize the record/playback head with a head demagne- tizer. (Do not bring the head demagnetizer close to the erase head.) 3.Do not use a magnetized screwdriver for the adjustments. 4.After the adjustments, apply suitable locking compound to the parts adjusted. 5.The adjustments should be performed with the rated power supply voltage unless otherwise noted. Torque Measurement PRECAUTION 1.The adjustment should be performed in the publication. (Be sure to male playback adjustment at first.) 2.The adjustments and measurement should be performed for both L-CH and R-CH. Switch position DOLBY NR switch: OFF DIRECTION switch: A Standard record position Deliver the standard input signal level to input jack and set the REC LEVEL (RV301) control to obtain the standard output signal level as follows. Record Mode set AF OSC attenuator 600 10 k LINE IN + LINE OUT 47 k level meter Standard Input Level Input terminalLINE IN source impedance10 k input signal level0.5 V ( 3.8 dB) Standard Output Level Output terminalLINE OUT (L-CH) load impedance47 k output signal level0.5 V ( 3.8 dB) Test Tape TypeSignalUsed for P-4-A10010 kHz, 10 dBAzimuth Adjustment P-4-L300315 Hz,0 dBPB Level Adjustment WS-48B3 kHz,0 dBTape Speed Adjustment 0 dB = 0.775 V ModeTorque MeterMeter Reading CQ-102C 30 65 gcm FWD (0.42 0.90 ozinch) FWD1.5 6 gcm Back tension(0.021 0.083 ozinch) CQ-102RC 30 65 gcm REV (0.42 0.90 ozinch) REV1.5 6 gcm Back tension(0.021 0.083 ozinch) 70 130 gcm FF, REWCQ-201B (0.98 1.80 ozinch) Test Mode With the POWER turned OFF, short the test point CN801 (2P) on the SYSTEM CONTROL board (making IC801 pin ! “L”) and turn the POWER ON. Thus, the TEST mode will be activated. If a recording is done in the TEST mode, the REC MEMORY mode becomes active where the tape is rewound by the amount of recording when a rewinding is executed after recording. After adjustment, make the CN801 (2P) open to release the TEST mode. 8 Record/Playback Head Azimuth Adjustment Procedure: 1.Mode: REV playback + set 47 k LINE OUT level meter test tape P-4-A100 (10 kHz, 10 dB) 2.Turn the adjustment screw for the maximum output levels. If these levels do not match, turn the adjustment screw until both of output levels match together within 1 dB. Tape Speed Adjustment Procedure: Mode: FWD playback + set LINE OUT frequency counter test tape WS-48B (3 kHz, 0 dB) 47 k 1. Set to FWD playback mode. 2. Adjust RV801 so that the frequency counter reading becomes 3,000 90 Hz. 3. Confirm that the deviation between tape top and tape end is within 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 Adjustment Procedure: Mode: FWD playback Screw position L-CH peak within 1dB output level L-CH peakR-CH peak within 1dB angle R-CH peak 3.Phase Check Mode: REV playback + VH + Screen pattern GoodWrong in phase 4590135180 LINE OUT set R-CH L-CH47 k 47 k oscilloscope test tape P-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 head FWD sideREV side Adjustment screw + set LINE OUT 47 k test tape P-4-L300 (315 Hz, 0 dB) level meter Adjust RV151 (L-CH) and RV251 (R-CH) so that the reading on level 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 dB Check that the LINE OUT level does not change even if Playback and Stop operation is repeated several times. Adjustment Location: AUDIO board (See page 10) 9 Record BIAS Adjustment Setting: REC LEVEL control: Standard record position (See page 7) Set to the TEST mode (REC MEMORY mode). (See page 7) Procedure: 1.Mode: Record Record Level Adjustment Setting: REC LEVEL control: Standard record position (See page 7) Set to the TEST mode (REC MEMORY mode). (See page 7) Procedure: 1.Mode : Record set AF OSC attenuator 600 10 k blank tape CS-123 LINE IN 1) 315 Hz 2) 10 kHz 50 mV ( 23.8 dB) set AF OSC attenuator 600 10 k blank tape CS-123 LINE IN 315 Hz, 50 mV ( 23.8 dB) 2.Mode: Playback + set LINE OUT 47 k recorded portion level meter 3.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 playback output of 315 Hz: 0.5 dB. Adjustment Location: AUDIO board (See page 10) 2.Mode: Playback + set LINE OUT 47 k recorded portion level meter 3.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 Location AUDIO BOARD (Component Side) SYSTEM CONTROL BOARD (Component Side) CN714 CN711 IC304 CN351 RV151 Playback Level (L-CH) RV251 Playback Level (R-CH) RV252 Record Bias (R-CH) RV152 Record Bias (L-CH) RV153 Record Level (L-CH) IC301 RV253 Record Level (R-CH) CN803 IC803 CN801 TEST Mode RV801 Tape Speed 11 1METER-RIDigital peak level meter signal input (R-ch) 2METER-LIDigital peak level meter signal input (L-ch) 3KEY-YI Key input (A/D convert input) *1 4KEY-XI 5FWD-TABIRecord proof detection input from S902 (FWD side)“H”: Not nail 6CHROM SWITape type detection input from S903“L”: Type I 7RVS-TABIRecord proof detection input from S904 (REV side)“H”: Not nail 8METAL SWIMetal cassette detection input from S906 9PLAY SWIPlayback and stop detection input from S907“L”: Playback 10TEST MODEITest mode terminalNormal: “H”Test mode: “L” 11POWER OUTOAudio and mechanism power on/off output“L”: Off 12POWER DETIPrimary power on/off input“H”: On 13CLOSEO Loading motor (M901) drive output *2 14OPENO 15 16 17Not used (Fixed at “L”) 18 19 20 21CLOCKOClock signal output to back-up memory (IC803) 22DATAI/OData signal input/output to back-up memory (IC803) 23RELAYORelay drive output“L”: On 24BIASOControl output to recording bias switch (Q352)“L”: On 25AU BUS-OUTOAudio bus output 26AU BUS-INIAudio bus input 27RESETIReset input 28X CININot used (Fixed at “L”) 29X COUTONot used (Open) 30X INIMain system clock input (4 MHz) 31XOUTOMain system clock output (4 MHz) 32VssGround 33REC MUTEORecording mute on/off control output“L”: Mute on 34LINE MUTEOLine mute on/off control output“L”: Mute on 35Not used (Fixed at “L”) 36PB MUTEOPlayback mute on/off control output“L”: Mute on 37REC/PBOMode control output to DOLBY NR amplifier (IC301)When recording: “L” 38DOLBY B/CODOLBY B/C select signal output“L”: DOLBY C, “H”: DOLBY B 39DOLBY ON/OFFODOLBY on/off select signal output“L”: DOLBY On, “H”: DOLBY Off 40Not used (Open) 41Not used (Open) 42Not used (Open) 43CD SYNCOControl output to CD SYNC LED (D851) 44P17O 45P16OSegment signal output to fluorescent indicator tube (FLT851) 46P15O 5-1.IC PIN FUNCTION DESCRIPTION SYSTEM CONTROL BOARD IC801 M38172M4-150FP (SYSTEM CONTROL) Pin No.Pin NameI/OFunction SECTION 5 DIAGRAMS 12 Pin No.Pin NameI/OFunction 47P14O 48P13O 49P12O 50P11O 51P10O 52P9O 53P7OSegment signal output to fluorescent indicator tube (FLT851) 54P6O 55P5O 56P4O 57P3O 58P2O 59P1O 60G5O 61G4O 62G3OGrid Signal output to fluorescent indicator tube (FLT851) 63G2O 64G1O 65TYPE 1OTape type output“H”: Normal position 66TYPE 2OTape type output“H”: High position 67TYPE 4OTape type output“H”: Metal position 68 69Not used (Fixed at “L”) 70 71SOLENOIDOPlunger (PM901) drive output“H”: On 72CAPSTANOCapstan/reel motor (M902) drive output“H”: On 73VccPower supply (+5 V) 74VeeGround 75AVssGround for A/D converter 76VrefIReference voltage (+5 V) for A/D converter 77HALFICassette half detection input from S905 78AMS INIAMS input 79LIMIT SWILoading detection input from S901Open: “L”, Close: “M”, COM: “H” 80PULSEIRotary detection input from PH901 Voltage Input port 0 V0.45 V1.19 V2.19 V3.2 V3.98 V4.48 V5.0 V Pin 4, KEY-X Open/CloseSTOPPAUSEFWDREVCD Not key input pPSYNC Pin 3, KEY-Y POWERREWFFREC RESETDIRECTION DOLBY NRNot key input ON/OFF0)r *1 Key Input *2 Loading Motor (M901) INOUTBRAKE CLOSE !HLH OPEN !LHH 23 NOTE: -XX and -X mean standardized parts, so they may have some difference from the original one. Color Indication of Appearance Parts Example: KNOB, BALANCE (WHITE) . . . (RED) Parts ColorCabinets Color Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. The mechanical parts with no reference num- ber in the exploded views are not supplied. Hardware (# mark) list and accessories and packing materials are given in the last of the electrical parts list. SECTION 6 EXPLODED VIEWS The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. (1) COVER, FRONT PANEL SECTION Ref. No.Part No.DescriptionRemarkRef. No.Part No.DescriptionRemark 14-985-926-01 KNOB 2X-3372-679-1 PANEL ASSY, FRONT 34-962-708-01 EMBLEM (4-A), SONY 43-939-648-01 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), +BVTP 93-939-653-01 LID (R-TC) 103-363-099-01 SCREW (CASE 3 TP2) * 113-939-652-11 COVER * 12A-2007-717-A PANEL BOARD, COMPLETE 133-939-643-01 BUTTON (FF) (0. ) 143-939-642-01 BUTTON (PLAY) (. . P. p) 153-939-644-01 BUTTON (EJECT) (. OPEN/CLOSE) 4 not supplied 5 7 8 9 10 13 15 #1 #1 1 2 3 14 12 not supplied 8 6 11 10 24 (2) CHASSIS SECTION 514-977-699-11 LEG (F) * 52A-2007-716-A SYSTEM CONTROL BOARD, COMPLETE 531-773-247-11 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), CORD 591-696-981-11 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, COMPLETE 634-965-822-01 FOOT * 643-350-847-21 HOLDER, PCB !T9011-431-302-11 TRANSFORMER, POWER Ref. No.Part No.DescriptionRemarkRef. No.Part No.DescriptionRemark The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. #1 not supplied 63 62 #2 58 57 57 56 55 54 not supplied 61 60 59 TCM-9700HLD T901 AEP UK #2 #1 #8 64 #2 51 64 not supplied 64 52 #1 53 #1 25 (3) MECHANISM DECK SECTION-1 (TCM-9700HLD) not supplied 103 104 105 106 107 108109 106 110 111 101 102 #4 #3 S901 M901 Ref. No.Part No.DescriptionRemarkRef. No.Part No.DescriptionRemark 101A-2004-430-A TRAY (A) ASSY 102A-2004-429-A CLAMP (B) ASSY 1033-917-502-01 SCREW (2X8), +BTT 1043-917-501-01 SPRING, TOGGLE 1053-917-498-01 SCREW (2.6X6), +BTT 1063-917-497-01 SCREW (2.6X5), +BTT 1073-917-499-01 BELT 108X-3369-090-1 GEAR ASSY 1093-918-629-01 SPRING (A), COMPRESSION 1103-918-630-01 WASHER, FLAT 1113-917-496-01 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) 170 169168167 166 165 164 163 162 174 162 176 177 not supplied not supplied 178 155 180 181 not supplied not supplied 185 #5 186 PM901 #5 #6 151 152 153 #6 #6 not supplied 154 not supplied not supplied 158 159 155 157 156 155 160 161 HRPE901 155 165 173 172 171 179 183 184 182 Ref. No.Part No.DescriptionRemarkRef. No.Part No.DescriptionRemark 151A-2004-436-A GEAR ASSY, PLAY 1523-917-549-01 ARM, PLAY 1533-917-553-01 SPRING (PLAY ARM), TOGGLE 1543-917-566-01 SCREW (2X6), +PTT 1553-917-565-01 SCREW (2X4), +PTT 1563-917-558-01 WASHER, POLY-SLIDER 1573-917-561-01 WASHER, NYLON 1583-917-556-01 SPRING (P ROLLER ARM R), TOGGLE 159A-2004-434-A ARM (R) ASSY, P ROLLER 1603-917-533-01 SCRE