索尼SONY WM-FX671电路图.pdf

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1、WM-FX671 US Model AEP Model SERVICE MANUAL RADIO CASSETTE PLAYER MICROFILM Manufactured under license from Dolby Laboratories Licensing Corporation. “DOLBY” and the double-D symbol a are trademarks of Dolby Laboratories Licensing Corporation. Model Name Using Similar MechanismWM-EX678 Tape Transport

2、 Mechanism TypeMT-WMEX672-162 SPECIFICATIONS Radio section Frequency rangeFM : 87.5 108MHz AM : 531 1.602 kHz Tape section Frequency response (Dolby NR off)Playback: 40 15,000Hz OutputHeadphones (2 REMOTE) jack Load impedance 8 300 General Power requirements1.5V Rechargeable battery One R6 (size AA)

3、 battery Dimensions (w/h/d)Approx. 108.9 77.7 23.9 mm (43/8 31/8 31/32inches), incl. projecting parts and controls MassApprox. 145 g (5.2 oz) Approx. 210 g (7.5oz) incl. rechargeable battery and a cassette Supplied accessoriesBattery case (1) Stereo earphones (1) Battery charge (1) Rechargeable batt

4、ery (NC-6WM, 1.2V, 600mAh, Ni-Cb) (1) Rechargeable battery carring case (1) Carrying pouch (1) Design and specifications are subject to change without notice Ver 1.0 1999. 03 ? ? ? ? ? ? ? ? ? ? 2 Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus si

5、de 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 on the same conductor of the circuit board (within 3 times). Be careful not to apply force on the conductor when so

6、ldering or unsoldering. SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! 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 SUPPLE

7、MENTS PUBLISHED BY SONY. TABLE OF CONTENTS 1. SERVICE NOTE3 2. GENERAL 5 3. DISASSEMBLY 3-1. Case Block Assembly 6 3-2. Belt (F2) 7 3-3. Cassette Lid Assembly 7 3-4. Reel Ornament Assembly 8 3-5. Main Board 8 3-6. Motor (F2) (M901) 9 3-7. Holder Assembly 9 3-8. Pinch Lever (N)/(R) Assembly 10 3-9. M

8、agnetic Head (HP901) 10 4. MECHANICAL ADJUSTMENT 11 5. ELECTRICAL ADJUSTMENT 11 6. DIAGRAMS 6-1. Block Diagram 13 6-2. Printed Wiring Board 16 6-3. Schematic Diagram (1/2) 19 6-4. Schematic Diagram (2/2) 22 6-5. IC Block Diagrams 25 6-6. IC Pin Function Discription 27 7. EXPLODED VIEWS 7-1. Cabinet

9、Block, Main Board 29 7-2. Mechanism Deck Block 30 8. ELECTRICAL PARTS LIST 31 ? ? ? ? ? ? ? ? ? ? 3 p? ? (S3) ENTER (S10) BAND (S8) MENU (S6) R43 (SIDE A) Q15 (SIDE A) PH1 (SIDE A) SET (S7) (S1) FWDSTOPREV Battery terminal ? Battery terminal ? Square-wave (sine wave) 10 Hz, -3.5 dB AF OSC Plunger (P

10、M901) Short R TUME SWITCH (S901-2) TAPE DETECT SWITCH (S901-1) FF AMS (S4) REW AMS (S5) REPEAT (S9) M601M SECTION 1 SERVISE NOTE Service Mode The service mode enables to operate the mechanism of WM-FX671 while the MAIN board is opened. Rotation of the idler gear (A) (S side) is detected using the ph

11、oto- reflector (PH1) in the WM-FX671. PH1 is located on the MAIN board, therefore the rotation of the idler gear (A) (S side) cannot be detected by PH1 when the MAIN board is removed. As a result, the motor cannot be controlled and cannot run correctly. To repair the machine after the MAIN board is

12、removed while the main power is turned on, follow the procedures as described below. 1. Setting 1)Remove the cabinets referring to section “3. DISASSEMBLY”. Open the MAIN board. 2)Connect the motor (M601) and the plunger solenoid (PM901) to the MAIN board using the jumper wires. When the extension j

13、ig (1-769-143-11) (10 wires as a set) is used, they can be connected easily. 3)Short the TAPE DETECT switch (S901-2), R TUME switch (S901-1). 4)Connect an AF oscillator to resistor (R43). 5)Connect DC 1.3 V from external regulated power supply to and terminals of the battery. 2. PRE-SET status The P

14、LAY, FF and REW modes can be entered only from the PRE- SET status. 1)Check that the slider (NR) is in the center position (S1), and the FWD/REV switch is also in the center position. When these switches are not in the center position, set them to the PRE-SET status as follows. 2)Move the FWD/REV sw

15、itch (S1) to the same position as the slider (NR) is set. 3)The slider (NR) can be moved when the main power of the regulated power supply is turned OFF once then back ON. Move the FWD/REV switch (S1) to the center position in synchronism with the timing when the slider (NR) is moved. 3. FF, REW mod

16、es 1)Check that the PRE-SET status is set. 2)Connect square wave or sine wave to resistor (R43). (See illustration below.) 3)Press the p switch (S3) to enter the STOP mode. 4)Press the FF AMS switch (S4) and the REW AMS switch (S5). 4. PLAY mode 1)Check that the PRE-SET status is set. 2)Connect squa

17、re wave or sine wave to resistor (R43). (See illustration below.) 3)Press the p switch (S3) to enter the stop mode. 4)When the 9(REPEAT switch (S9) of the MAIN board is pressed, the slider (N/R) moves once to the F side then moves to the R side. When the FWD/REV switch (S1) is pressed in the synchro

18、nism with the above timing, the machine can enter the PLAY (R side) mode. Press the 9(REPEAT switch (S9) again, and move the FWD/REV switch (S1) in the synchronism with the motion of slider (NR). It enables the machine to enter into the PLAY (F side) mode. Note 1: When you fail to enter the PLAY mod

19、e, re-start from step 1) PRE-SET status. Note 2: Regarding the 9(REPEAT (S9), p (S3), FF AMS (S4), and REW AMS (S5) switches, use these switches of the remote control unit as much as possible. Note 3: If a headphones are used, the beep sound shows the timing of the FWD/REV switch (S1). MAIN BOARD (S

20、IDE B) ? ? ? ? ? ? ? ? ? ? 4 Slider (NR) Tape drive mechanism Tape drive mechanism in PLAY mode Tape drive mechanism in FF modeTape drive mechanism in REW mode Slider (NR) Center F side R side Insert Flywheel (N) Pulley (Reverse) Clutch Assy Motor Pulley Gear (REEL)(S side)Gear (REEL)(T side) Gear (

21、NR) (FWD : Left side REV : Right side) Idler Gear Idler Gear (A)(S side) Idler Gear (A)(T side) Insert Flywheel (R) Cam Gear Gear (Y) Insert Flywheel (N) Pulley (Reverse) Clutch Assy Motor Pulley Gear (REEL)(T side) Idler Gear (A)(T side) Insert Flywheel (R) Cam Gear Gear (Y) Gear (FR) (FF : Left si

22、de) Insert Flywheel (N) Pulley (Reverse) Clutch Assy Motor Pulley Gear (REEL)(S side) Idler Gear (A)(S side) Insert Flywheel (R) Cam Gear Gear (Y) Gear (FR) (REW : Right side) ? ? ? ? ? ? ? ? ? ? 5 SECTION 2 GENERAL 12345 6 7 8 9!?!?!?!? !? LOCATION OF CONTROLS 1 2 REMOTE jack 2 REW, AMS button 3 “

23、”, REPEAT button 4 FF, AMS button 5 OPEN knob 6 Battery case 7 Display window 8 HOLD c knob 9 SET button ! MENU button ! BAND, RADIO ON button ! ENTER, COUNTER RESET button ! p, RADIO OFF button ! VOL knob ? ? ? ? ? ? ? ? ? ? 6 SECTION 3 DISASSEMBLY Note :Disassemble the unit in the order as shown b

24、elow. Note :Follow the disassembly procedure in the numerical order given. Set Case block assembly Belt (F2) Cassette lid assemblyMain board Reel ornament assembly Motor (F2) (M901) Holder assembly Pinch lever (N)/(R) assembly Magnetic head (HP901) 3-1.CASE BLOCK ASSEMBLY 3 Screw (M1.4 2.5) 2 Two sc

25、rews (M1.4 2.5) 1 Battery case Lid 5 Remove the case block assembly in the direction of the arrow. 4 Two screws (M1.4 2.5) knob (HOLD) Claw S2 Note:When assembling the case block assembly, align the knob (HOLD) with the position of S2. ? ? ? ? ? ? ? ? ? ? 7 3-2.BELT (F2) 3 Belt (F2) 2 Terminal board

26、 (Battery ) 1 Remove solder from the battery terminal board. Belt (F2) Belt threading 3-3.CASSETTE LID ASSEMBLY 5 Cassette lid assembly 4 Shaft 3 Open the cassette lid 1 Screw (M1.4 2.0) 2 Two screws (M1.4 2.0) ? ? ? ? ? ? ? ? ? ? 8 3-4.REEL ORNAMENT ASSEMBLY 1 Reel Ornament assembly Remove the asse

27、mbly while removing the three claws and boss carefully. Note: Claw Claw 3-5.MAIN BOARD SLIDER 9 Remove soldeing (two points) from plunger solenoid. 7 Screw (B1.7 3) tapping 6 Screw (B1.7 3) tapping 3 Screw (M1.4) 8 Screw (M1.4) 2 Head flexible board 4 Screw (M1.4) Bracket assy 0 Remove soldeing (fou

28、r points) from motor. When assembling the MAIN board, align the slider with the position of S1. Note: 5 Screw (M1.4) 1 Remove soldering from Head flexible board. ? ? ? ? ? ? ? ? ? ? 9 3-6.MOTOR (F2) (M901) 1 Two screws (M1.4) 2 Motor (F2) (M901) Toothed lock 3-7.HOLDER ASSEMBLY 4 Screw (M1.4) 2 Shaf

29、t 6 Shaft 1 Two screws (M1.4 1.4) 3 Lock lever (B) 0 Remove the holder assembly in the direction of the arrow. 8 Remove soldering from Head flexible board. 5 Lock lever (S) 9 Head flexible board 7 Cassette bracket assembly ? ? ? ? ? ? ? ? ? ? 10 3-8.PINCH LEVER (N) / (R) ASSEMBLY Claw Claw 2 Remove

30、the pinch lever (N) assembly in the direction of the arrow. Note:Be careful of the claw 1 Remove the pinch lever (R) assembly in the direction of the arrow. Note:Be careful of the claw 3-9.MAGNETIC HEAD (HP901) 1 Remove the magnetic head (HP901) in the direction of the arrow. ? ? ? ? ? ? ? ? ? ? 11

31、SECTION 4 MECHANICAL ADJUSTMENT SECTION 5 ELECTRICAL ADJUSTMENT PRECAUTION 1.Specified voltage: 1.3 V (DC) 2.Switch and control position MENU switch aNR: OFF AVLS: OFF SOUND: OFF HOLD: OFF VOL: MAX Test Tape Tape Speed Adjustment Procedure: 1.Enter the FWD playback mode. 2.Adjust RV601 so that the v

32、alue of the frequency counter reading becomes 3,000 Hz. Specification value: Frequency counter 2,955 Hz 3,060 Hz 3.Check that the frequency deviation at the beginning and ending of a tape is within 1.5 % (45 Hz). PRECAUTION 1.Clean the following parts with a denatured-alcohol-moistened swab: playbac

33、k headpinch roller rubber beltscapstan 2.Demagnetize the playback head with a head demagnetizer. 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 suppl

34、y voltage unless otherwise noted. Torque Measurement Mode FWD FWD Back Tension REV REV Back Tension FF, REW Torque Meter CQ-102C CQ-102C CQ-102RC CQ-102RC CQ-201B Meter Reading 15 to 25 gcm (0.21 to 0.34 ozinch) Less than 2.0gcm (Less than 0.028 ozinch) 15 to 25 gcm (0.21 to 0.34 ozinch) Less than 2

35、.0gcm (Less than 0.028 ozinch) More than 50 gcm (More than 0.69 ozinch) Signal 3 kHz, 0 dB Used for Tape Speed Adjustment Tape WS-48A Test tape WS-48A (3kHz, 0dB) Set 2 REMOTE jack (J701) 16 Frequency counter + MAIN BOARD SIDE B ? ? ? RV601 L2 T2 TP6 TP5 IC2 13 241 12 T1 RV1 RV601 : Tape speed adjus

36、tment RV1 : FM VCO adjustment T2 : AM IF adjustment L2 : FM frequency coverage adjustment T1 : AM frequency coverage adjustment TP1 Adjustment Parts Location : MAIN BOARD SIDE A TAPE SECTION ? ? ? ? ? ? ? ? ? ? 12 AM BAND switch : AM FM BAND : FM Repeat the procedures in each adjustment several time

37、s. AM FREQUENCY COVERAGE ADJUSTMENT Adjust for a maximum reading on level meter. T1531 kHz FM FREQUENCY COVERAGE ADJUSTMENT Adjust for a maximum reading on level meter. L276 MHz FM VCO Adjustment Procedure : 1.Connect frequency counter to the positions shown below. 2.Tune the set to 98 MHz. 3.Adjust

38、 RV1 so that the value of the frequency counter reading becomes 19 kHz. Specification Value : Frequency counter 18,900 19,100 Hz TUNER SECTION 0.01F FM RF signal generator to ANT (TP1) 22.5kHz frequency deviation by 400Hz signal. Output level : as low as possible Put the lead-wire antenna close to t

39、he set. 30% amplitude modulation by 400Hz signal. Output level : as low as possible AM RF signal generator 16 set + level meter 2 REMOTE jack (J701) AM IF ADJUSTMENT Adjust for a maximum reading on level meter. T2450 kHz 0.01F FM RF signal generator to ANT (TP1) Carrier frequency : 98MHz IModulation

40、 : no modulation Output level : 0.1V (100dB) Frequency counter 1F + 100k TP5 (IC2 Pin !) TP6 (IC2 Pin 9) 0dB=1V Adjustment Location: MAIN board (See page 11) ? ? ? ? ? ? ? ? ? ? WM-FX671 SECTION 6 DIAGRAMS 13 14 15 6-1. BLOCK DIAGRAM ? ? ? ? ? ? WM-FX671 17 18 6-2. PRINTED WIRING BOARD Note on Print

41、ed Wiring Board: X : parts extracted from the component side. Y : parts extracted from the conductor side. Through hole is omit. b : Pattern from the side which enables seeing. Caution: Pattern face side:Parts on the pattern face side seen from (SIDE B)the pattern face are indicated. Parts face side

42、:Parts on the parts face side seen from (SIDE A)the parts face are indicated. 16 12 A B C D E F G H 3456789101112131415161718192021 Semiconductor Location Ref. No.LocationRef. No.Location D1A-14 D2B-14 D3F-14 D4C-15 D5B-8 D6C-13 D101C-9 D201C-9 D301C-9 D302B-9 D303B-9 Ref. No.Location D304B-8 D305G-9 D801D-4 D802E-3 D803D-3 D804D-3 IC1B-14 IC2D-14 IC3D-17 IC4F-18 IC5D-18 IC6C-19 IC301F-17 IC302E-9 IC601D-19 IC801D-3 Q1D-16 Q2C-16 Q3B-13 Q4B-14 Q5D-15 Q6C-15 Q7B-13 Q8C-16 Q9D-6 Q10C-13 Q11D-15 Q12E-16 Q13E-13 Q14B-13 Q15C-4 Ref. No.Location Q16C-15 Q17C-15 Q18F-15 Q19F-16 Q20C-6 Q30