Sony-BM23MK2-tape-sm 电路图 维修手册.pdf

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1、SERVICE MANUAL Sony Corporation Personal Audio Group Published by Sony Engineering Corporation US Model PORTABLE DICTATOR 9-879-836-01 2005H1678-1 2005.08 Ver. 1.0 2005.08 BM-23MK2 Model Name Using Similar MechanismNEW Tape Transport Mechanism TypeMB-23MK2-101 SPECIFICATIONS RadioFans.CN 收音机爱 好者资料库

2、2 BM-23MK2 Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be damaged by heat. Flexible Circuit Board Repairing Keep the temperature of soldering iron around 270C during repairing. Do not touch the soldering iron o

3、n the same conductor of the circuit board (within 3 times). Be careful not to apply force on the conductor when soldering or unsoldering. TABLE OF CONTENTS 1.SERVICING NOTES.3 2.GENERAL.4 3.DISASSEMBLY 3-1.Disassembly Flow .5 3-2.Cabinet (Rear) Block Assembly .6 3-3.Control Panel Block Assembly.7 3-

4、4.AUDIO Board.8 3-5.Mechanism Deck (MB-23MK2-101) .9 3-6.Holder Panel Assembly .9 4.MECHANICAL ADJUSTMENTS. 10 5.ELECTRICAL ADJUSTMENTS. 10 6.DIAGRAMS 6-1.Block Diagram AUDIO Section . 13 6-2.Printed Wiring Boards . 14 6-3.Schematic Diagram AUDIO Board (1/4) . 15 6-4.Schematic Diagram AUDIO Board (2

5、/4) . 16 6-5.Schematic Diagram AUDIO Board (3/4) . 17 6-6.Schematic Diagram AUDIO Board (4/4) . 18 6-7.Schematic Diagram LCD Board . 19 7.EXPLODED VIEWS 7-1.Cabinet Section. 22 7-2.Chassis Section. 23 7-3.Mechanism Deck Section-1 (MB-23MK2-101). 24 7-4.Mechanism Deck Section-2 (MB-23MK2-101). 25 8.E

6、LECTRICAL PARTS LIST. 26 UNLEADED SOLDER Boards requiring use of unleaded solder are printed with the lead- free mark (LF) indicating the solder contains no lead. (Caution: Some printed circuit boards may not come printed with the lead free mark due to their particular size) : LEAD FREE MARK Unleade

7、d solder has the following characteristics. Unleaded solder melts at a temperature about 40 C higher than ordinary solder. Ordinary soldering irons can be used but the iron tip has to be applied to the solder joint for a slightly longer time. Soldering irons using a temperature regulator should be s

8、et to about 350 C. Caution: The printed pattern (copper foil) may peel away if the heated tip is applied for too long, so be careful! Strong viscosity Unleaded solder is more viscou-s (sticky, less prone to flow) than ordinary solder so use caution not to let solder bridges occur such as on IC pins,

9、 etc. Usable with ordinary solder It is best to use only unleaded solder but unleaded solder may also be added to ordinary solder. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. SAFETY-RELATED COMPONEN

10、T 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 PUBLISHED BY SONY. RadioFans.CN 收音机爱 好者资料

11、库 3 BM-23MK2 SECTION 1 SERVICING NOTES This unit use PH501 (photo coupler) to detect reel rotation. As PH501 is mounted on the AUDIO board, reel rotation will not be detected if the AUDIO board has been removed. When performing mechanism deck operation and voltage checks whit the AUDIO board removed

12、, perform them using the following method. Method: Connect TP32 of the AUDIO board and GND with a jumper wire. AUDIO BOARD (SIDE B) TP32 IC503 PH501 RadioFans.CN 收音机爱 好者资料库 4 BM-23MK2 SECTION 2 GENERAL This section is extracted from instruction manual. 5 BM-23MK2 SECTION 3 DISASSEMBLY 3-1.DISASSEMBL

13、Y FLOW 3-3. CONTROL PANEL BLOCK ASSEMBLY (Page 7) 3-4. AUDIO BOARD (Page 8) 3-5. MECHANISM DECK (MB-23MK2-101) (Page 9) 3-6. HOLDER PANEL ASSEMBLY (Page 9) 3-2. CABINET (REAR) BLOCK ASSEMBLY (Page 6) SET This set can be disassembled in the order shown below. 6 BM-23MK2 3-2.CABINET (REAR) BLOCK ASSEM

14、BLY speaker 1Open the battery case lid in the direction of arrow. 4Remove soldering two the four points. 5cabinet (rear) block assembly note : When attaching the cabinet (rear) block assembly, adjust the position of the three knobs indicated by arrows A and the switch of the AUDIO board. 3two screws

15、 (+BTP 1.7 10) 2screw (M 1.4 5.0) A A AUDIO board Note: Follow the disassembly procedure in the numerical order given. 7 BM-23MK2 3-3.CONTROL PANEL BLOCK ASSEMBLY 3claw 2two claws qatwo claws 1screw (M1.4) AUDIO board4lever (lock) 9lever (lock) 6Remove the control panel block assembly in the directi

16、on of the arrow. 7control button assembly qdcontrol panel block assembly 8To attach the control panel block assembly , align the three switch positions as shown. qsscrew (M1.4) PRECAUTION DURING CONTROL PANEL BLOCK ASSEMBLY INSTALLATION control button assembly 5control button assembly 0claw 8 BM-23M

17、K2 3-4.AUDIO BOARD 0screw (M1.4 3) 1 screw (M1.4 3) 4battery case 5three cabinet upper cushions 8Remove soldering from the seven points. 7Remove soldering from the five points. 6harnesses 3Remove the soldering. qaRemove the AUDIO board complete in the direction of arrow. 9 flexible board (CN101) (12

18、core) 2screw (1.7 2.5) 9 BM-23MK2 3-5.MECHANISM DECK (MB-23MK2-101) 2Set the holder panel assembly to eject. 4mechanism deck (MB-23MK2-101) lock plate assembly 3two screws (M1.4 3.0) note : When attaching the mechanism deck, set the mechanism deck to stop and adjust the position of shaft-A and part

19、A of the lock plate assembly. shaft-A A 1Remove the soldering. 4holder panel assembly 1While pressing the button (eject), insert the two claws of the holder panel assembly into the holes indicated by arrows A. 2Move the battery coil spring in the direction of the arrow and secure it with the screw.

20、3two screws (M1.4 1.6) A A claw claw 3-6.HOLDER PANEL ASSEMBLY 10 BM-23MK2 SECTION 5 ELECTRICAL ADJUSTMENTS SECTION 4 MECHANICAL ADJUSTMENTS PRECAUTION 1. Clean the following parts with a denatured-alcohol-moistened swab : playback headrubber belts capstanidlers pinch roller 2. Demagnetize the playb

21、ack head with a head demagnetizer. 3. Do not use a magnetized screwdriver for the adjustments. 4. The adjustments should be performed with the rated power supply voltage (3V) unless otherwise noted. Torque Measurement ModeTorque MeterMeter Reading 2.06 3.72 mNm FWD21 38 gcm CQ-102C (0.30 0.52 ozinch

22、) 0.05 0.29 mNm FWD 0.5 3 gcm Back Tension (0.01 0.04 ozinch) 2.06 3.72 mNm REV21 38 gcm CQ-102RC (0.30 0.52 ozinch) REV 0.05 0.29 mNm 0.5 3 gcm Back Tension (0.01 0.04 ozinch) FF CQ-201B more than 60 gcm REW (more than 0.84 ozinch) PRECAUTION 1. Power supply voltage : 3V Test Tape Tape Speed 4.8cm/

23、s Adjustment Switch position TAPE SPEED Switch : 4.8 cm Procedure: 1. Play back WS-48A (tape center portion) in FWD mode. Adjust the RV601 so that the frequency counter reads 2,980 30 Hz. 2. Play back WS-48A (tape center portion) in REV mode. Confirm that the reading of frequency counter is within 2

24、.5 % from the reading in step 1. TypeSignalUsed for WS-48A3 kHz, 0 dbTape Speed Adjustment J102 set 18 test WS-48A (3 kHz, 0 dB) frequency counter ModeTorque MeterMeter Reading FFCQ-403A more than 40 g (more than 1.42 oz) REWCQ-403R Tape Pulling Force Measurement 11 BM-23MK2 Adjustment Parts Locatio

25、n Diagram : Tape Speed 2.4cm/s Adjustment Switch position TAPE SPEED Switch : 2.4 cm Procedure: 1. Play back WS-48A (tape center portion) in FWD mode. Adjust the RV602 so that the frequency counter reads 1,490 15 Hz. 2. Play back WS-48A (tape center portion) in REV mode. Confirm that the reading of

26、frequency counter is within 2.5 % from the reading in step 1. AUDIO BOARD (SIDE B) RV601 (TAPE SPEED 4.8cm ADJ.) RV602 (TAPE SPEED 2.4cm ADJ.) J102 set 18 test WS-48A (3 kHz, 0 dB) frequency counter 12 BM-23MK2 SECTION 6 DIAGRAMS Note for Printed Wiring Boards and Schematic Diagrams Note on Schemati

27、c Diagram: All capacitors are in F unless otherwise noted. (p: pF) 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. 2 : nonflammable resistor. C : panel designation. H : adjustment for repair. A : B+ Line. Tota

28、l current is measured with no cassette installed. Power voltage is dc 3V and fed with regulated dc power supply from battery terminal. Voltages are taken with a VOM (Input impedance 10 M). Voltage variations may be noted due to normal production tolerances. Waveforms are taken with a oscilloscope. V

29、oltage variations may be noted due to normal production tolerances. No mark : PB (LISTEN) () : REC (DICT) Circled numbers refer to waveforms. Signal path. E: PB (LISTEN) a: REC (DICT) Note on Printed Wiring Board: X : parts extracted from the component side. Y : parts extracted from the conductor si

30、de. : Pattern from the side which enables seeing. Caution: Pattern face side: Parts on the pattern face side seen from (Side A)the pattern face are indicated. Parts face side:Parts on the parts face side seen from (Side B)the parts face are indicated. Note: The components identified by mark 0 or dot

31、ted line with mark 0 are critical for safety. Replace only with part number specified. 1 IC701 wd (OSC) 2.1 Vp-p 1 s 1 V/DIV, 500 ns/DIV Waveforms LCD Board 1313 BM-23MK2 BM-23MK2 6-1.BLOCK DIAGRAM AUDIO SECTION HRP901-1 AUDIO HEAD HE901 ERASE HEAD J101 IC501 LETTER PB AMP IC701 SYSTEM CONTROLLER MI

32、C901 MIC HRP901-2 LETTER HEAD Q101, T101 BIAS OSC IC101 PRE AMP IC102 POWER AMP J102 SP501 SPEAKER M901 MOTOR S102 (POWER) S402 (FF/BACK SPACE) TH601 S101(3/4) S602(1/2) S601 (1/2) IC103 POWER AMP IC601 MOTOR SERVO Q501, Q502 AMP CONTROL S101 (1/4) Q504, Q505, Q523 E-INDEX Q519 SWITCH Q506 INVERTER

33、Q512 SWITCH LISTEN DICT STOP CONF DICT S103 MIC SENS S602 (2/2) TAPE SPEED 2.4cm 4.8cm S503 X701 1MHz LCD701 E-INDEX Q161 - Q163 LED CONTROL S101 (2/4) FAST PB Q104, Q106 MUTE Q102, Q107 MUTE CONTROL Q103 ATT Q105 COMP Q509 INVERTER S501 OFF ON CUE / REVIEW Q508, Q510, Q520 VOR S504 VOR Q701 - Q703

34、LCD DRIVER Q704 - Q706 LCD DRIVER Q707 - Q709 LCD DRIVER Q710 SWITCH Q711 SWITCH Q712 INVERTER Q713 INVERTER IC503 VOR Q507 SWITCH Q111 INVERTER Q112 SWITCH Q2, Q3, Q5 ALARM Q611 SWITCH Q521 SWITCH PH501 PHOTO COUPLER TAP ADJ. VCC 3V BATT CN102 +B Q109, Q110 SWITCH DRY BATTERY SIZE AA (ICE DESIGNATI

35、ON) 2PCS, 3.0V DC IN 3.0V Q1, Q4 MUTE SW Q715 INVERTER Q714 INVERTER Q516 LED CONTROL IC502 BATT VOLTAGE DET IC504 DC-DC CONVERTOR Q606, Q608 VOR CONTROL Q517, Q518 BATT DET Q511 SWITCH S502 D507 ON OFF LOCK D503 VR101 EAR Q601 - Q603, Q605, Q612, Q613 SERVO CONTROL Q503, Q513 - Q515 PHOTO REFLECTOR

36、 DET Q522 SWITCH 13 24 TAPE SPEED ADJ 2.4cm RV602 VOLUME TAPE SPEED 2.4cm 4.8cm MIC PLUG IN POWER 67 4 23 22 17 12 13 15 10 1 REC +B +B PLAY +B REC 3V D703 PLAY +BREC +B REC3V VCC3V PLAY +B S401 (BACK SPACE) D701 D702 REC +B 4 1 5 8 PLAY +B 22 10 OSC BS 4IN.CTL 7BATT1 23 OSC 21 COM3COM-1 SEG 0 I SEG

37、7 SEG-1 I SEG-8 11, 14 - 20 6COM2COM-2 5COM1COM-3 3VIN 3VOUT 5 RECOVERY TIME CAP 1INPUT 6OUT1 7OUT2 IN(-) SHUTDOWN OUT(-) OUT(+) TAPE SPEED ADJ 4.8cm RV601 8BATT2 9PHOTO 3POWER S701 3V IN 1OUT1 2OUT2 8VCC 3V IN BATT +B 3VOUTBATT Q610 SWITCH 4 1 5 8IN(-) +B +B SHUTDOWN OUT(-) VCC3V REC+B OUT(+) 14 15

38、 5 4 VREF IN+ UOUT VOUT 6WOUT 13S/S M Q607 SWITCH DICT/BATT LISTEN DICT STOP COUNTER RESET LISTEN DICT STOP S101 (4/4) LISTEN DICT STOP S601 (2/2) FAST PB PLAY +B Signal Path : PB (LISTEN) : REC (DICT) 1414 BM-23MK2 BM-23MK2 6-2.PRINTED WIRING BOARDS Semiconductor Location Ref. No.Location D161D-3 D

39、501C-2 D502D-2 D503B-6 D504C-7 D505B-2 D506B-3 D507B-2 Ref. No.Location D601C-2 D701D-9 D702D-10 D703D-11 D704D-10 IC101D-6 IC102D-6 Ref. No.Location IC103D-7 IC501D-7 IC502C-6 IC503C-8 IC504B-3 IC601F-7 IC701C-10 Ref. No.Location Q1D-2 Q2E-2 Q3D-2 Q4D-2 Q5D-2 Q101C-6 Q102C-7 Q103C-6 Ref. No.Locatio

40、n Q104C-6 Q105D-7 Q106C-6 Q107D-7 Q109E-3 Q110E-3 Q111D-6 Q112D-6 Ref. No.Location Q161B-4 Q162E-6 Q163D-3 Q501D-8 Q502E-7 Q503C-3 Q504B-2 Q505B-2 Ref. No.Location Q506B-2 Q507C-8 Q508D-7 Q509D-7 Q510D-7 Q511C-2 Q512C-2 Q513D-2 Ref. No.Location Q514C-3 Q515B-3 Q516B-6 Q517B-7 Q518B-7 Q519B-2 Q520D-7

41、 Q521C-3 Ref. No.Location Q522D-3 Q523B-2 Q601C-1 Q602C-2 Q603D-2 Q605C-2 Q606D-2 Q607E-2 Ref. No.Location Q608D-2 Q610E-2 Q611F-6 Q612C-2 Q613D-2 Q701C-9 Q702C-10 Q703C-10 Ref. No.Location Q704B-10 Q705B-10 Q706B-10 Q707C-10 Q708C-10 Q709B-10 Q710C-10 Q711D-9 Ref. No.Location Q712D-9 Q713D-10 Q714D

42、-9 Q715D-9 :Uses unleaded solder. IC502 IC503 IC103 IC102 IC501 IC101 IC601 IC701 IC504 E-INDEX S503 CUE/REVIEW ON OFF S501 FAST PB S601 LOCK S502 ON OFF TAPE SPEED 2.4cm 4.8cm S501 S401 (BACK SPACE) S102 (POWER) S402 (FF/BACK SPACE) VOLUME VR101 HRP901-1 AUDIO HEAD HE901 ERASE HEAD DRY BATTERY SIZE

43、 AA (ICE DESIGNATION) 2PCS, 3.0V EAR J102 MIC PLUG IN POWER J101 FB902 R106 WHT WHT BLK BLK DICT STOP LISTEN S101 ON OFF CON DICT VOR S504 MIC SENS S103 RED GRY BLK VIO MIC MIC901 HRP901-2 LETTER HEAD SP501 SPEAKER * M901 MOTOR *M901 Exchange the connection of U and W in order to connect the motor i

44、n reverse direction. BLK BLK (COM)(COM) (U) (V) (W) WHT (W) RED (V) BRW (U) WHT M DC IN 3V CN102 TAPE SPEED 4.8cm RV601 RV601RV602 TAPE SPEED 2.4cm RV602 12 LCD701 (LIQUID CRYSTAL DISPLAY) X701 COUNTER RESET S701 D704 DICT/ BATT D703 GRY 1-868-270-1-868-270- 12 A B C D E G F 34567981011 1515 BM-23MK

45、2 BM-23MK2 6-3.SCHEMATIC DIAGRAM AUDIO BOARD (1/4) R507 R506 R515 C503 R102 R103 R512 T101 R105 R112 R113 R101 R513 S103 R514 HE901 MIC901 J101 HRP90 TP1 TP2 TP3 TP4 TP5 TP6 TP7 TP22 TP23 TP24 R501 TP27 TP28 S101(1/4) S101(2/4) S602(2/2) R115 R100 TP65 TP31 TP21 TP62 TP58 R505 R114 C104 C107 C109 C1

46、10 C111 C148 C501 C506 C101 C103 C105 C108 C502 C505 C520 JR204 JR108 R116 JR106 C102 R503 C114 R502 R106 R107 R110 R109 R108 Q101 Q502 Q501 IC501 R504 C124 3.3k 47k 10k 330K 5.6k 330 39 1k 47k 1k 1.8k 330k 10k ERASEHEAD 1-1 2.2k 680 0 0.0039 4.7k 0.0056 0.0068 0.0033 0.015 0.0047 0.001 0.1 0.1 0.1 35V 33 4V 0.47 35V 47 4V 2.2 10V 3.3 4V 220 4V 0 0 22k 0 0.1 100k 1 100k 10k 1K 82 470 100 2SD1819A-R-TX 2SD1819A-R-TX 2SB1218A-R-TX NJM2100V(TE1) 68k 22 6.3V 1616 BM-23MK2 BM-23MK2 6-4.SCHEMATIC DIAGRAM AUDIO BOA