索尼SONY TCM-20DV电路图.pdf
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1、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 Sup
2、plied 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 M
3、onaural 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
4、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 Curr
5、ent (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 v
6、ary 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
7、. 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 “NORM
8、AL”) 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 ? ?
9、 ? ? ? ? ? ? ? ? 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
10、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 r
11、euse 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 FONCTIONNEM
12、ENT. 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 SAF
13、E 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
14、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
15、 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 disassemble
16、d 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. cass
17、ette 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 hea
18、d (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) S1
19、02 (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
20、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 h
21、ead 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
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