Instruction/ maintenance manual of the product TCM-23DV Operating Instructions (primary manual) Sony
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SERVICE MANUAL CASSETTE-CORDER US Model TCM-20D V/21D V/22D V/23D V Canadian Model TCM-20D V/22D V AEP Model TCM-20D V/21D V E Model TCM-20D V/23D V Chinese Model TCM-20D V SPECIFICA TIONS TCM-20DV/21.
– 2 – T ABLE OF CONTENTS 1. SER VICING NOTES ............................................... 2 2. GENERAL ................................................................... 3 3. DISASSEMBL Y .......................................................
– 3 – SECTION 2 GENERAL This section is e xtracted from instruction manual. • Location of Controls REC TIME MIC VOL B PLA Y M FF/CUE SPEED CONTROL EAR VOR z REC x STOP m REW/ REVIEW P AUSE DC IN 3 V .
– 4 – CABINET (REAR), CASSETTE LID Note: Follo w the disassembly procedure in the numerical order giv en. SECTION 3 DISASSEMBL Y • This set can be disassembled in the order sho wn below .
– 5 – MAIN BO ARD, MECHANISM DECK (MT -20D V -118) BEL T 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).
– 6 – INST ALLA TION MAIN BO ARD 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 – Mode T orque Meter Meter Reading 4.90 mN•m FWD CQ-403C (more than 50 g) (more than 1.76 oz) Mode T orque Meter Meter Reading FWD 2.16 - 4.7 mN•m (22 - 48 g•cm) CQ-102C (0.31 - 0.67 oz•inch) FWD 0.05 - 0.29 mN•m (0.5 - 3 g•cm) Back T ension (0.
– 8 – SECTION 5 ELECTRICAL ADJUSTMENTS T ape 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 R V601 so that frequency counter reading becomes 3,040 Hz.
TCM-20D V/21DV/22D V/23DV – 9 – – 10 – SECTION 6 DIA GRAMS 6-1. BLOCK DIA GRAM MIC AMP, REC/PB EQ AMP IC101 (1/3) POWER AMP, VOR CONTROL,REGULATOR IC101 (2/3) 05 • SIGNAL PATH : PLAY : RECOR.
TCM-20D V/21DV/22D V/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 R103 R102 R105 R106 R134 R130 .
TCM-20D V/21DV/22D V/23DV – 13 – – 14 – Note on Schematic Diagram: • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums. • All resistors are in Ω and 1 / 4 W or less unless otherwise specified.
• IC Block Diagram IC101 LA4168ML-TE-L + – + – + – + – 21 22 23 24 25 26 27 28 29 30 2 3 5 4 6 7 8 9 10 1 11 12 13 14 15 16 17 18 19 20 300k EQ MIC 2.
– 17 – Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark (2) MECHANISM DECK SECTION-1 (MT -20D V -118) 51 X-3377-250-1 LEVER, (2) ASSY , PINCH 52 3-925-146-01 BUTTON (FF) (.
– 18 – (3) MECHANISM DECK SECTION-2 (MT -20D V -118) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 101 3-321-483-11 RING, RET AINING (0.
– 19 – SECTION 8 ELECTRICAL P ARTS LIST Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * A-3021-314-A MAIN BOARD, COMPLETE ********************* 3-924-741-01 TERMINAL, PLUS < CAP ACITOR > C101 1-163-809-11 CERAMIC CHIP 0.
– 20 – Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R105 1-216-049-11 RES-CHIP 1K 5% 1/10W R106 1-216-049-11 RES-CHIP 1K 5% 1/10W R108 1-216-085-00 MET AL CHIP 33K 5% 1/10W R109 1-216-037-00 MET AL CHIP 330 5% 1/10W R110 1-216-037-00 MET AL CHIP 330 5% 1/10W R111 1-216-069-00 MET AL CHIP 6.
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