索尼SONY TCM-20DV电路图.pdf
SERVICE MANUAL CASSETTE-CORDER US Model TCM-20DV/21DV/22DV/23DV Canadian Model TCM-20DV/22DV AEP Model TCM-20DV/21DV E Model TCM-20DV/23DV Chinese Model TCM-20DV SPECIFICATIONS TCM-20DV/21DV/ 22DV/23DV Model Name Using Similar MechanismNEW Tape Transport Mechanism TypeMT-20DV-118 Photo: TCM-20DV Supplied accessories The instructions in this manual are for 4 models. The TCM-20DV is the model used for illustration purposes. TCM-23DV 22DV 21DV 20DV AC power adaptor (1)a Battery charger adaptor (1)a Rechargeable batteries (2) a(NC-AA, 1.2V, 700mAh, Ni-Cd) Cassette tape C-90 (1)a Battery LR6 (2)a Monaural microphone (1)a Super-directional a microphone (1) Carrying pouch (1)a Hand strap (1) aaaa (attached to the unit) Battery life (Approx. hours) (EIAJ*) PlaybackRecording Sony alkaline LR6 (SG) 1111 Sony R6P (SR)33 Sony rechargeable battery 33 (NC-AA) fully charged (TCM- 22DV only) * Measured value by the standard of EIAJ (Electronic Industries Association of Japan). (Using a Sony HF series cassette tape and playing back with speakers) Note The battery life may shorten depending on the operation of the unit. For maximum performance we recommend that you use alkaline batteries. House Current (see Fig. A-) Connect the AC power adaptor to DC IN 3V and to a wall outlet. The AC power adaptor is supplied only with the TCM-22DV. For other models, use the AC-E30HG AC power adaptor (not supplied). Do not use any other AC power adaptor. Polarity of the plug Note Specifications for AC-E30HG vary for each area. Check your local voltage and the shape of the plug before purchasing. 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 nomal (TYPE 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 Variable range of the tape speed From approx. +30% to 15% (with REC TIME switch at “NORMAL”) Power requirements 3 V DC batteries R6 (AA) 2/ External DC 3 V power sources Dimensions (w/h/d) (incl. projecting parts and controls) Approx. 112 36.6 90.3 mm (4 12 1 12 x 3 58 in.) Mass Approx. 175 g (6.2 oz.) Design and specifications are subject to change without notice. Ver 1.0 2000. 02 ? ? ? ? ? ? ? ? ? ? 2 TABLE OF CONTENTS 1.SERVICING NOTES.2 2.GENERAL.3 3.DISASSEMBLY.4 4.MECHANICAL ADJUSTMENTS.7 5.ELECTRICAL ADJUSTMENTS.8 6.DIAGRAMS 6-1.Block Diagram .9 6-2.Printed Wiring Board . 11 6-3.Schematic Diagram . 13 7.EXPLODED VIEWS. 16 8.ELECTRICAL PARTS LIST. 19 Flexible Circuit Board Repairing Keep the temperature of the soldering iron around 270 C dur- ing 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 of a tantalum capacitor may be dam- aged by heat. ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT! LES COMPOSANTS IDENTIFIS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHMATIQUES ET LA LISTE DES PICES SONT CRITIQUES POUR LA SCURIT DE FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS QUE PAR DES PICES SONY DONT LES NUMROS SONT DONNS DANS CE MANUEL OU DANS LES SUPPLMENTS PUBLIS PAR SONY. SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 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. SECTION 1 SERVICING NOTES In this set, the S102 (POWER) detects REC/PLAYBACK on. It is mounted on the MAIN board, and therefore the REC/PLAY- BACK on cannot be detected with the MAIN board removed. When making an operation check and voltage check of mechani- cal deck with the MAIN board removed, fix the S102 at turn on. MAIN BOARD (Conductor Side) S102 on ? ? ? ? ? ? ? ? ? ? 3 SECTION 2 GENERAL This section is extracted from instruction manual. Location of Controls REC TIME MIC VOL B PLAY M FF/CUE SPEED CONTROL EAR VOR z REC x STOP m REW/ REVIEW PAUSE DC IN 3 V . Built-in mic BATT ? ? ? ? ? ? ? ? ? ? 4 CABINET (REAR), CASSETTE LID Note: Follow the disassembly procedure in the numerical order given. SECTION 3 DISASSEMBLY This set can be disassembled in the order shown below. SET CABINET (REAR), CASSETTE LID MAIN BOARD, MECHANISM DECK (MT-20DV-118)BELT 9 cassette lid INSTALLATION CASSETTE SPRING cabinet front 5 hand strap 3 claw 3 four claws 2 screw (IB lock) 4 cabinet (rear) 1 three screws (B1.7 9) 7 boss 7 boss 6 Remove the six solders. cassette lid cassette spring ? ? ? ? ? ? ? ? ? ? 5 MAIN BOARD, MECHANISM DECK (MT-20DV-118) BELT 6 claw 2 screw (1.7) 3 screw (M1.4) 4 MAIN board 7 mechanism deck (MT-20DV-118) 5 three screws (IB lock) 1 Remove the two solders electret condenser microphone (MIC101). 1 Remove the two solders magnetic head (HRP901). 1 Remove the two solders motor (M901). 1 belt (capstan) 2 belt (FR) capstan belt FR belt pulley (FR) assy flywheel assy motor DC ? ? ? ? ? ? ? ? ? ? 6 INSTALLATION MAIN BOARD On installation MAIN board, adjust to the S101 and the S102. screw (1.7) screw (M1.4) MAIN board S101 (REC/PB) S102 (POWER) lever (REC) ? ? ? ? ? ? ? ? ? ? 7 ModeTorque MeterMeter Reading 4.90 mNm FWDCQ-403C(more than 50 g) (more than 1.76 oz) ModeTorque MeterMeter Reading FWD 2.16 - 4.7 mNm (22 - 48 gcm) CQ-102C (0.31 - 0.67 ozinch) FWD 0.05 - 0.29 mNm (0.5 - 3 gcm) Back Tension (0.007 - 0.04 ozinch) FF 4.90 mNm CQ-201B(more than 50 gcm) REW(more than 0.69 ozinch) SECTION 4 MECHANICAL ADJUSTMENTS Tape Tension Measurement 1.Clean the following parts with a denatured-alcohol-moistened swab: record/playback headpinch roller erase headrubber belt capstanidlers 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 (2.5 V) unless otherwise noted. Torque Measurement ? ? ? ? ? ? ? ? ? ? 8 SECTION 5 ELECTRICAL ADJUSTMENTS Tape Speed Adjustment Mode: playback Procedure: Normal Speed 1.Set REC TIME switch (S601) to NORMAL (4.8 cm/s) posi- tion, and playback the tape (WS-48A) . 2.Adjust RV601 so that frequency counter reading becomes 3,040 Hz. Specification values: 3,030 to 3,050 Hz Double Speed 3.Set REC TIME switch (S601) to DOUBLE (2.4 cm/s) posi- tion. 4.Playback the tape from the beginning for two minutes, then adjust RV603 so that frequency counter reading becomes 1,540 Hz. Specification values: 1,535 to 1,545 Hz Confirm that deflection of the frequency counter reading between the beginning and the end of tape is within 1% (NORMAL: approx. 30.4 Hz, DOUBLE: approx. 15.4 Hz) . Adjustment Location: MAIN BOARD (Conductor Side) Setting: Supplied voltage: 2.5 V Switch and control position VOL control (RV101): mechanical center PAUSE switch (S105) : OFF SPEED CONTROL(RV602): center click VOR switch (S104): OFF Test Tape Record/Playback Head Azimuth Adjustment Mode: playback Procedure: 1.Turn the adjustment screw to obtain the maximum reading on level meter. Note: Several peaks may appear, but take the maximum. 2.After the adjustment, lock the adjustment screw with suitable locking compound. Adjustment Location: 0 dB=0.775 V TypeSignal Used for P-4-A0636.3 kHz, 10 dBHead Azimuth Adjustment WS-48A3 kHz, 0 dBTape Speed Adjustment level meter test tape P-4-A063 (6.3 kHz, 10 dB) 10 k set EAR jack (J102) + adjustment screw Press the N button. frequency counter test tape WS-48A (3 kHz, 0 dB) 10 k EAR jack (J102) set + J102J101 RV601 Tape Speed Adjustment (Normal Speed) RV603 Tape Speed Adjustment (Double Speed) w . ? ? ? ? ? ? ? ? ? ? TCM-20DV/21DV/22DV/23DV 9 10 SECTION 6 DIAGRAMS 6-1.BLOCK DIAGRAM MIC AMP, REC/PB EQ AMP IC101 (1/3) POWER AMP, VOR CONTROL,REGULATOR IC101 (2/3) 05 SIGNAL PATH : PLAY : RECORD GVN OUT VREF MIC VCC Q106 REC/PB MONITOR LEVEL SWITCHING SP901 (SPEAKER) POW OUT 1 POW OUT 2 POW IN REC B+ REC B+ REC B+ REC B+ PB B+ POWER ON B+ POWER ON B+ BATTERY B+ PB B+ REC B+ PB B+ PRE OUT PRE NF MIC IN EQ IN REC OUT VREF VREF VREF S102 (POWER) S101 (4/6) S101 (1/6) HRP901 (REC/PB) HE901 (ERASE) Q101 AGC CONTROL GVN CONT 20 GVN VREF 19 VS 18 16 27 26 12 14 LED DRIVE 24 PAUSE 22 MUTE VCC 21 15 11 VOR DELAY 7 R/P SW 23 1 REC IN 3 2 29 4 ALC CONT 5 28 J101 MIC (PLUG IN POWER) RV101 VOL J102 EAR MIC AMP EQ AMP POWER AMP VOX REC/PB PAUSE MUTE RIPPLE FILTER REFERENCE VOLTAGE GENERATOR REFERENCE VOLTAGE MUTE SWITCH Q107, 108 REGULATOR MOTOR DRIVER REC AMP ALC BUFFER Q102 MUTE SWITCH Q109, 110 NF Q103 REC EQ SWITCH Q104 PB EQ SWITCH S101 (REC/PB) PB REC S101 (2/6) (REC/PB) PB REC S101 (5/6) (REC/PB) PB REC OFF ON S101 (3/6) (REC/PB) PB REC + PB B+ Q112 SWITCHING Q105 VOR OFF SWITCH Q111 VOR ON SWITCH PAUSE . S105 BATT D101 OFFHL VOR S104 DRY BATTERY SIZE “AA” (IEC DESIGNATION R6) 2PCS. 3V CN101 DC IN 3V + MIC101 MIC REC B+ REC B+ + CAPSTAN/REEL MOTOR DRIVE IC101 (3/3) VCC B+ M901 (CAPSTAN/REEL) M RV601 THP602 DOUBLENORMAL REC TIME S601-1 DOUBLENORMAL REC TIME S601-2 SPEED CONTROL RV602 S101 (6/6) (REC/PB) PB REC POWER ON B+ THP601 POWER ON B+ TAPE SPEED (NORMAL SPEED) RV601 TAPE SPEED (DOUBLE SPEED) RV603 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? TCM-20DV/21DV/22DV/23DV 11 12 6-2.PRINTED WIRING BOARDS C140 C110 C121 R610 C126 C108 R137 R110 R114 C145 R119 R109 R108 C144 C146 C148 C107 C141 C106 R103R102R105 R106 R134 R130 R601 R603 R131 R132 R104 R118 R112 C112 R113 R111 R133 R129 R122 C136 R101 C102 C103 C132 C142 C149 R142 R606 R607 R609 R602 C114 C116 C109 C134 C143 C101 C147 C117 C118 C119 Q104 Q103 B C E Q101 B C E B C E Q106 C111+ C105+ C104+ B C E MAIN BOARD (CONDUCTOR SIDE) C125 + C123+ C127+ C128 1 15 30 16 IC101 + C129 + C122 + C124 + C120 + RV603 RV601 THP601 THP602 BLK BRN RED BRN BLK BLK BRN BRN M901 (CAPSTAN/REEL) SP901 (SPEAKER) M M HRP901 (REC/PB HEAD) HE901 (ERASE HEAD) 1 2 1-676-966-(11) 11 1-676-967-11 DRY BATTERY SIZE “AA” (IEC DESIGNATION R06) 2PCS. 3V CN101 DC IN 3V + S102 (POWER) Q102 C2 B1 E1 E2 B2 C1 1 2 RV101 VOL 12 MIC101 MIC BLK RED BATT D101 EAR J102 J101 MIC (PLUG IN POWER) 3 2 1 6 5 4 S101 (REC/PB) REC PB SW BOARD MAIN BOARD (COMPONENT SIDE) R139 R143 R117 R116 C139 R138 R141 R126 R144 R123 C138 R135 R201 R115 R125 C130 R604 R127 C137 R136 C113 Q105 B C E Q110 Q109 Q107 Q108 B C E B C E B C E B C E BCE Q112 C133 + Q111 B C E S105 PAUSE OFF ON RV602 SPEED CONTROL S104 VOR OFF L H 1-676-966-(11) 11 1 A 23456789101112131415 B C D E F G H I J K 2 1 S601 REC TIME DOUBLE NORMAL 05 BLK BLK BRN BRN Note on Printed Wiring Boards: X : parts extracted from the component side. Y : parts extracted from the conductor side. z: Through hole. b : Pattern from the side which enables seeing. (The other layers patterns are not indicated.) Caution: Pattern face side:Parts on the pattern face side seen from (Conductor Side)the pattern face are indicated. Parts face side:Parts on the parts face side seen from (Component Side)the parts face are indicated. Ref. No.LocationRef. No.Location Semiconductor Location D101A-13 IC101E-11 Q101D-13 Q102D-14 Q103D-10 Q104D-10 Q105G-6 Q106F-9 Q107F-3 Q108E-3 Q109E-3 Q110F-3 Q111C-7 Q112E-2 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? TCM-20DV/21DV/22DV/23DV 13 14 Note on Schematic Diagram: All capacitors are in F unless otherwise noted. pF: F 50 WV or less are not indicated except for electrolytics and tantalums. All resistors are in and 1/4 W or less unless otherwise specified. C : panel designation. U : B+ Line. H : adjustment for repair. Total current is measured with no cassette installed. Power voltage is dc 3 V and fed with regulated dc power supply from external power voltage jack. Voltages are dc with respect to ground under no-signal conditions. no mark : PLAY : RECORD Voltages are taken with a VOM (Input impedance 10 M). Voltage variations may be noted due to normal produc- tion tolerances. Signal path. E: PLAY a: RECORD 6-3.SCHEMATIC DIAGRAM See page 15 for IC Block Diagram. ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? IC Block Diagram IC101LA4168ML-TE-L + + + + 21222324252627282930 235467891011112131415 1617181920 300k EQ MIC 2.2k 30k 2k PAUSE POWER MIC 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 REC IN REC OUT ALC CONT VOX CONT VOX DELAY GNV SPEED UP AUT STOP CONT AUT STOP IN PWR IN PWR O
