Sony-TCM50DV-tape-sm 电路图 维修手册.pdf

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1、 1 Model Name Using Similar MechanismNEW Tape Transport Mechanism TypeMT-50-30 SERVICE MANUALUS Model Canadian Model AEP Model E Model Tourist Model TCM-50DV CASSETTE-CORDER Recording system 2-track 1 channel monaural Tape speed 4.8 cm/s or 2.4 cm/s Frequency range 250 - 6,300 Hz using normal (TYPE

2、I) cassette (with REC TIME switch at “NORMAL”) Speaker Approx. 3.6 cm (1 7/16 in.) dia. Power output 250 mW (at 10% harmonic distortion) Input Microphone input jack (minijack) sensitivity 0.2 mV for 3 kilohms or lower impedance microphone Output Earphone jack (minijack) for 8 - 300 ohms earphone Var

3、iable range of the tape speed From approx. +25% to 15% (with REC TIME switch at “NORMAL”) Power requirements 3 V DC batteries AA (R6) 2/External DC 3 V power sources Battery life (Approx. hours)(EIAJ*) Sony alkaline LR6 (SG)Sony R6P (SR) Playback9.51.5 Recording10.52 * Measured value by the standard

4、 of EIAJ (Electronic Industries Association of Japan). (Using a Sony HF series cassette tape) SPECIFICATIONS Dimensions (w/h/d) (inci. projecting parts and controls) Approx. 88.7 115.3 37.2 mm (3 1/2 4 5/8 1 1/2 in.) Mass Approx. 250 g (8.9 oz.) Supplied accessories Size AA (R6) batteries (2) (Touri

5、st model only) Earphone (1) (Tourist model only) Design and specifications are subject to change without notice. MICROFILM Ver 1.1 2000. 08 With SUPPLEMENT-1 (9-926-919-81) RadioFans.CN 收音机爱 好者资料库 2 TABLE OF CONTENTS Flexible Circuit Board Repairing Keep the temperature of the soldering iron around

6、270C during repairing. Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). Be careful not to apply force on the conductor when soldering or unsoldering. Notes on Chip Component Replacement Never reuse a disconnected chip component. Notice that the minus side

7、of a tantalum capacitor may be dam- aged by heat. 1. SERVICING NOTE .3 2. GENERAL Operating the Unit .4 3. DISASSEMBLY 3-1. Cabinet, Cassette Lid Assy . 6 3-2. MAIN Board, Cassette Machanism .7 3-3. Belt . 8 3-4. Head . 8 3-5. Motor, DC .9 3-6. Note for Installation of Main Board.9 4. MECHANICAL ADJ

8、USTMENTS.10 5. ELECTRICAL ADJUSTMENTS .10 6. DIAGRAMS 6-1. Block Diagram . 11 6-2. Printed Wiring Board Main Section. 13 6-3. Schematic Diagram Main Section. 15 6-4. Printed Wiring Board Panel Section . 17 6-5. Schematic Diagram Panel Section .18 6-6. IC Pin Description. 20 7. EXPLODED VIEWS 7-1. Ca

9、se Section. 21 7-2. Panel Section. 22 7-3. Mechanism Deck Section-1 . 23 7-4. Mechanism Deck Section-2 . 24 8. ELECTRICAL PARTS LIST .25 RadioFans.CN 收音机爱 好者资料库 3 TP30 TP30 TP20 TP20 S101 PB REC S103 (POWER) SECTION 1 SERVICING NOTE 1-1. SERVICE MODE Mode to allow the mechanical parts to operate wit

10、h the main board open. This set uses the photo reflector PH701 to detect the rotation of the idler gear. PH701 is on the main board and so removal of the main board does not allow the set to detect the rotation of the idler gear. This makes motor control impossible which prevents normal operation. W

11、hen repairing the set as energized with the main board removed, proceed as follows: 1. Setting 1) Remove the cabinet (rear) (refer to the Disassembly) and open the main board. 2) Apply a trapezoidal of 10 to 100 Hz (at 1.3 V) from oscillator to TP20. (Connect the ground to TP30.) 3) Supply DC 3.0 V

12、to the positive and negative terminals of the battery with a stabilized power supply. 2. FF mode 1) Apply a trapezoidal to hall sensor TP20. 2) Press the FF key. 3) Turn on the S103 (POWER) switch. 3. REW mode 1) Apply a trapezoidal to hall sensor TP20. 2) Press the REW key. 3) Turn on the S103 (POW

13、ER) switch. 4. PLAY mode 1) Apply a trapezoidal to hall sensor TP20. 2) Press the PLAY key. 3) Change over the S101 (REC/PB) switch to PB side. 4) Turn on the S103 (POWER) switch. 5. REC mode 1) Apply a trapezoidal to hall sensor TP20. 2) Press the REC key. 3) Change over the S101 (REC/PB) switch to

14、 REC side. 4) Turn on the S103 (POWER) switch. main board (conductor side) main board (component side) RadioFans.CN 收音机爱 好者资料库 4 SECTION 2 GENERALThis section is extracted from instruction manual. 5 6 SECTION 3 DISASSEMBLY The equipment can be removed using the following procedure. Note : Follow the

15、 disassembly procedure in the numerical order given. 3-1. CABINET (REAR), CASSETTE LID ASSY 1 two screws (screw (B1.7x9), tapping) 2 two screws (screw (B1.7x9), tapping) 3 two claws 4 cabinet (rear) 5 LED flexible board 6 shaft (A), stopper 7 screw, ornamental 8 screw, ornamental 9 cassette lid assy

16、 Cabinet (rear), Cassette Lid Assy Mechanism Deck, Main board Belts Head Motor, DC 7 3-2. MACHANISM DECK, MAIN BOARD 2 mechanism deck, MAIN board 1 three screws (screw (IB lock) 3 Remove the four solders. 4 head flexible board 5 two screws (screw (M1.4), toothed lock) 6 MAIN board 8 3-3. BELTS 3-4.

17、HEAD 1 belt (motor) 2 belt (flywheel) 3 belt (counter) belt (motor) belt (flywheel) belt (counter) How to apply the belts 1 two screws 2 head, magnetic (REC/PB/ERASE) 9 3-6. NOTE FOR INSTALLATION OF MAIN BOARD Align the knobs of S101, S103 and S701 on the main board with the claws of the lever (REC)

18、 lever (erase proof 2) and lever (REC) of the mechanism deck respectively, and install the main board. 3-5. MOTOR, DC 3 Remove the four solders. 1 screw (1.4) 2 screw (1.4) 4 Motor, DC MAIN board S103 S101 S701 screws (M1.4), toothed lock mechanism deck lever (PAUSE) lever (REC) lever (erase proof 2

19、) 10 test tape WS-48A (3 kHz, 0 dB) set 8 EAR jack digital frequency counter PRECAUTION 1.Clean the following parts with a denatured-alcohol-moistened swab : record/playback/erase headpinch roller capstanrubber belt 2.Demagnetize the record/playback/erase head with a head demagnetizer. (Do not bring

20、 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 (1.3 V) unless otherwise noted. Torque

21、 Measurement ModeTorque MeterMeter Reading 15 25 g cm FWD CQ-102C (0.21 0.35 oz inch) FWDless than 2 g cm back tension(less than 0.03 oz inch) 15 25 g cm REV CQ-102RC (0.21 0.35 oz inch) REVless than 2 g cm back tension(less than 0.03 oz inch) more than 50 g cm FF, REWCQ-201B (more than 0.69 oz inch

22、) SECTION 4 MECHANICAL ADJUSTMENTS 1.REC TIME : NORMAL/FWD Playback WS-48A (tape center part) and adjust RV601 so that reading on the digital frequency counter becomes 3,000 Hz. 2.REC TIME : DOUBLE/FWD Playback WS-48A (tape center part) and adjust RV602 so that reading on the digital frequency count

23、er becomes 1,500 Hz. Specification Value : Digital Frequency Counter Reading REC TIME : NORMALREC TIME : DOUBLE 2,985 to 3,015 Hz1,485 to 1,515 Hz 3.REC TIME : NORMAL/REV Playback WS-48A (tape center part) and confirm that the reading on digital frequency counter are between 2,985 to 3,015 Hz. 4.REC

24、 TIME : DOUBLE/REV Playback WS-48A (tape center part) and confirm that the reading on digital frequency counter are between 1,435 to 1,515 Hz. Adjustment Location : Tape Speed Adjustment Procedure : SECTION 5 ELECTRICAL ADJUSTMENTS PRECAUTION Supplied voltage : DC 3.0 V Switch and control position V

25、OL control: max (10) MIC SENS switch: free (L or H) VOR switch: free (OFF or ON) SPEED CONTROL control : mechanical center Test Tape TypeSignalUsed for WS-48A3 kHz, 0 dBtape speed adjustment RV602 RV601 main board (conductor side) 11 12 TCM-50DV 6-1. BLOCK DIAGRAM SECTION 6 DIAGRAMS SP101 SPEAKER VO

26、L RV101 DRY BATTERY SIZE AA (IEC DESIGNATION R6) 2PCS,3V PULSE AMP Q708 SWITCH Q706, 707 DP CON OSC Q702 4 +3V +3V TAPE ROTATION DETECTOR PH701 10 5 8 6 2322 32 REC/PB (FWD) HRPE901 REC/PB/ERASE HEAD REC/PB (REV) BIAS OSC Q112 ERASE (FWD) ERASE (REV) 1 7 6 5 SWITCH Q501 OUT1 RECOVERY TIME CAP OUT2 I

27、N NF LEVEL SWITCH Q103 NF LEVEL SWITCH Q104 VOR IC501 NF LEVEL SWITCH Q105 MIC SENS S902 HL 5 1 28 12 7 11 911 27 29 3 Signal path : TAPE (PB) : TAPE (REC) MIC IN ALC CONT PRE NF EQ IN VREF OUT REC OUT AMP Q102 2 PRE OUT REC IN POW IN POW OUT1 POW OUT2 1 2 LED CONTROL Q704 MUTE Q109 LED CONTROL Q302

28、,303 MUTE DRIVE Q110 SWITCH Q107,108 R.F 4 21 26 25 OUT LED CONTROL Q301 D903 BATTERY VOLTAGE DETECTOR IC301 21 23 R/P MUTE R/P SW MIC VCC R.F OUT S101-2 (REC/PB) PB REC PB REC S101-1 (REC/PB) D901 BATT D902 REC J102 MIC +3V 3 V OUTV IN REG IC701 24 D701 MOTOR CONTROL Q705 DIRECTION MOTOR BRAKE SW Q

29、601 - 604 19 M901 CAPSTAN/REEL MOTOR W OUT V OUT U OUT 11 2 1 20 1312 BIAS REF VOLTAGE PULSE DET OPERATION LOGIC PRE DRIVER CURRENT DET FREQ. CHARC. REF VOLTAGE FOR SPEED CONTROL DIR S/S IN + OSC S101-4 (REC/PB) PB REC RV601 TAPE SPEED REC TIME NORMAL RV602 TAPE SPEED REC TIME DOUBLE REC TIME S903-2

30、 DOUBLE NORMAL REC TIME S903-1 NORMAL DOUBLE ON OFF FWD REV SWITCH Q703 IN4 IN6 IN8 SYSTEM CONTROL IC702 20 17 OUT2 OUT1 OUT5 IN7 CONT CL VCC VDD IN1 1819 OUT3 OUT4 MOTOR SERVO IC601 S102-4 (FWD/REV) FWD REV PB REC S101-3 (REC/PB) J101 EAR +3V +3V S103 (POWER) -+ + DC IN 3V CN101 PRE / POWER AMP IC1

31、01 T701 VREF SPEED CONTROL RV603 D702 Q701 OFF ON S701 PAUSE +3V 4 T101 Q111 Q101 +3V S102-3 (FWD/REV) Q106 MIC901 Flat Mic V O R S901 - + + - + - S702 (REW / REVIEW) S703 (DIR) S704 (FF / CUE) IN2 IN3 IN5 S102-2 (FWD /REV) REV FWD 14 ERROR AMP 04 1-672-148- (11) 11 S702 (REW/REVIEW) 04 (FF/CUE) SPE

32、ED CONTROL S703 (DIR) S701 ON OFF S101 (REC/PB) PB REC REC/PB ERASE REC/PB ERASE ( ) ( ) ( ) ( ) S102 (FWD/REV) REV FWD DRY BATTERY SIZE AA (IEC DESIGNATION R6) 2PCS,3V HRPE901 REC/PB/ERASE HEAD 1-672-148- (11) 11 TP20 TP30 1 A B C D E F G H I J 234567891011121314 13 14 TCM-50DV Q103D-9 Q104D-9 Q105

33、E-10 Q106H-2 Q107F-8 Q108F-8 Q109F-9 Q110F-8 Q111F-1 Q112G-3 Q301F-10 Q302F-10 Q303F-10 D701C-1 D702D-2 IC101F-9 IC301F-10 IC501E-2 IC601C-8 IC701C-1 IC702C-2 PH701D-1 Q101H-10 Q102D-9 Semiconductor Location Ref. No.LocationRef. No.LocationRef. No.Location Q501E-2 Q601B-10 Q602B-10 Q603B-9 Q604B-9 Q

34、701D-2 Q702D-1 Q703D-2 Q704D-9 Q705C-2 Q706B-2 Q707B-2 Q708D-1 6-2. PRINTED WIRING BOARD MAIN SECTION Note on Printed Wiring Boards: X : parts extracted from the component side. : Through hole. b : Pattern from the side which enables seeing. (Page 17) TCM-50DV 15 16 6-3. SCHEMATIC DIAGRAM MAIN SECTI

35、ON Refer to page 19 for IC Block Diagrams. Note on Schematic Diagram: All resistors are in and 1/4 W or less unless otherwise specified. C : panel designation. U : B+ Line. H : adjustment for repair. Power voltage is dc 3 V and fed with regulated dc power supply from external power voltage jack. Vol

36、tage is dc with respect to ground under no-signal (detuned) condition. no mark : PB () : REC : FF/REW Voltages are taken with a VOM (Input impedance 10 M). Voltage variations may be noted due to normal produc- tion tolerances. Signal path. E: PB a: REC (Page 18) 04 S903 DOUBLE NORMAL S902 H L 1 18 S

37、901 ON OFF 1-672-149- (11) 11 1-672-149- LED FLEXIBLE BOARD 1 (11) 11 1 A B C D E F G H I J 23456 17 18 TCM-50DV Note on Schematic Diagram: All resistors are in and 1/4 W or less unless otherwise specified. C : panel designation. Signal path. E: PB Note on Printed Wiring Boards: X : parts extracted

38、from the component side. : Through hole. b : Pattern from the side which enables seeing. 6-5. SCHEMATIC DIAGRAM PANEL SECTION 6-4. PRINTED WIRING BOARD PANEL SECTION (Page 14) (Page 15) 19 1 13 2 14 3 15 4 165 17 6 18 7 19 8 20 9 10 11 12 PRE DRIVER DIRECTION ANTI LOCKING PULSE DET OPERATION LOGIC O

39、SC REF VOLTAGE FOR SPEED CONTROL BIAS + CURRENT DET TSD SLEEP DET START DET FREQ. CHARC. ERROR AMP FEED BACK REF VOLTAGE VOUT WOUT PGND WB VB UB OSC COM GND RI UOUT DR VCC LB FC OUT VSP IN+ VREF S/S + + + + 21222324252627282930 235467891011112131415 1617181920 300k EQ MIC 2.2k 30k 2k PAUSE POWER MIC

40、 VCC Vref R/P R, F GVN VOX SPEED ALC VOX 20k REC 1 2 PRE GND EQ IN MIC IN Vref OUT MIC VCC R, F OUT LED DRIVE R/P SW PAUSE P/R MUTE GVN CONT GVN Vref Vs GVN GND GVN OUT PRE NF PRE OUT REG IN REG OUT ALC CONT VOX CONT VOX DELAY GNV SPEED UP AUT STOP CONT AUT STOP IN PWR IN PWR OUT1 PWR GND PWR OUT2 V

41、cc 1 2 3 4 8 7 6 5 GND AMP OUT GAIN CONT INPUTVCC OUTPUT2 OUTPUT1 RECOVERY TIME CAP 1234 5678 + + VOLTAGE UP CIRCUIT VREF NC VCC VS HYS NC CT GND OUT IC Block Diagrams IC101 LA4168ML IC501 NJM2072MIC601 LB1877V IC301 MM1251M 20 6-6. IC PIN DESCRIPTION IC702 TB2004FN-020 (SYSTEM CONTROL) Pin No.Pin N

42、ameI/OPin Description 1GNDGND 2OSCFor system clock generation (fosc=3.2 kHz) 3CLIRESET input 4IN1IPause ON/OFF by PAUSE SW and VOR. “L” : ON, “H” : OFF 5IN2IFWD reset by cassette cover open-close. “L” : ON, “H” : OFF 6IN3IDirection “L” : ON, “H” : OFF 7IN4IREC/PB switch “L” : REC, “H” : PB 8IN5IFF/R

43、EW “L” : ON, “H” : OFF 9IN6IPOWER ON/OFF “L” : ON, “H” : OFF 10IN7IPhoto reflector pulse input for tape end detection. 11IN8IFWD/REV switch “L” : FWD, “H” : REV 12I/O1Not used. 13I/O2Not used. 14OUT8Not used. 15OUT7Not used. 16OUT6Not used. 17OUT5OLED ON/OFF “L” : ON, “H” : OFF 18OUT4OAudio mute “L”

44、 : ON, “H” : OFF 19OUT3OMotor brake “L” : ON, “H” : OFF 20OUT2OMotor direction “L” : FWD, “H” : REV 21OUT1OMotor ON/OFF “L” : ON, “H” : OFF 22VDDPower supply for CMOS. 23CONTOBoosting circuit control output 24VCCPower supply for bipolar. 21 Ref. No.Part No.DescriptionRemarkRef. No.Part No.Descriptio

45、nRemark SECTION 7 EXPLODED VIEWS NOTE: The mechanical parts with no reference number in the exploded views are not supplied. Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. -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 Color Cabinets Color 7-1. CASE SECTION N N Accessories and packing materials are given in the last of