索尼SONY WM-EX2000电路图.pdf

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1、WM-EX2000 E Model Chinese Model Tourist Model SERVICE MANUAL CASSETTE PLAYER SPECIFICATIONS Model Name Using Similar MechanismNEW Tape Transport Mechanism TypeMT-WMEX2000-162 Manufactured under license from Dolby Laboratories Licensing Corporation. “DOLBY” and the double-D symbol ; are trademarks of

2、 Dolby Laboratories Licensing Corporation. Frequency response (Dolby NR off)Playback: 30 18,000 Hz OutputHeadphones (i jack) Load impedance 8 300 Power requirements1.2 V One rechargeable battery Dimensions (w/h/d)Approx. 76.3 108.4 17.5 mm (31/8 43/8 23/32 inches) MassApprox. 145 g (5.2 oz.) Supplie

3、d accessoriesStereo headphones or earphones with remote control (1) Battery charging stand (1) AC power adaptor (1) Rechargeable battery (NH-14WM (A), 1.2V, 1 350 mAh (MIN), Ni-MH) (1) Rechargeable battery carrying case (1) Carrying pouch (1) Design and specifications are subject to change without n

4、otice Ver 1.0 2000. 10 ? ? ? ? ? ? ? ? ? ? 2 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.

5、 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. TABLE OF CONTENTS 1. GENERAL 2 2. SERVICE NOTE3 3. DISASSEMBLY 3-1. Lid Assy, Cassette 5 3-2. Case Block Assy 5 3-3. Ornament (O

6、pen) Block Assy 6 3-4. “Switch, Leaf (S704)”, Main Board 6 3-5. Belt (F0), Motor (M601) 7 3-6. Holder Assy 7 3-7. Pinch Lever (N2)/(R2) Assy 8 3-8. Magnetic Head (HP701) 8 4. MECHANICAL ADJUSTMENT 9 5. ELECTRICAL ADJUSTMENT9 6. DIAGRAMS 6-1. Block Diagram 10 6-2. Printed Wiring Board 12 6-3. Schemat

7、ic Diagram (1/2) 15 6-4. Schematic Diagram (2/2) 18 6-5. IC Block Diagrams 21 6-6. IC Pin Function Description 23 7. EXPLODED VIEWS 7-1. Cabinet Block 24 7-2. Mechanism Deck Block 25 8. ELECTRICAL PARTS LIST 26 SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MAR

8、K 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. SECTION 1 GENERAL This section is extracted from instruction manual. MODE SOUND VOL AVLS

9、 HOLD Hold shutter Cache de verrouillage Schutzschieber VOL AVLS REW () FF (+) Yx Jog lever Levier Jog Jog-Hebel FF REW Jog lever Levier Jog Jog-Hebel Plug in firmly. Branchez fermement. Fest einstecken. OPEN ? ? ? ? ? ? ? ? ? ? 3 M601M TAPE IN SWITCH (S704-1) ATS SWITCH (S704-2) BP1 Battery termina

10、l # Plunger (PM701) Battery terminal 3 (S702) FWDCNTREV jumper GND (TP10) S PH IN(S)(TP32) T PH IN(S)(TP31) Square wave (sine wave) 10 Hz, -3.5 dBs AF OSC SECTION 2 SERVICE NOTE Service Mode The service mode enables to operate the mechanism of WM-EX2000 while the MAIN board is opened. Rotation of th

11、e idler gear (A) (S side) is detected using the photo- reflector (PH702) in the WM-EX2000. PH702 is located on the MAIN board, therefore the rotation of the idler gear (A) (S side) cannot be detected by PH702 when the MAIN board is removed. As a result, the motor cannot be controlled and cannot run

12、correctly. To repair the machine after the MAIN board is 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 (PM701) to th

13、e MAIN board using the jumper wires. When the extension jig (1-769-143-11) (10 wires as a set) is used, they can be connected easily. 3)Short the TAPE IN switch land (BP1) with solder. Input a square (or sine) wave of 10 Hz (at 1.3 Vp-p) to both PH IN T land (TP31) and PH IN S land (TP32) with jumpe

14、r wire. 4)Connect DC 1.3 V from external regulated power supply to 3 and # terminals of the battery. 2. PRE-SET status The set must be in this state before the PLAY, FF and REW modes can be entered. 1)Make sure that the slider (F/R) is in the center position and that the F/R switch (S702) is in the

15、center position. Make sure that the reel gear does not rotate by rotating the flywheel on the F side clockwise. If improper, place the set in the preset state according to the following instructions: 2)Repeat the step below some times to ensure the above conditions. *Pull away the trigger level from

16、 the plunger with tweezers or other means. Then rotate the flywheel on the F side clockwise. 3)Turn the stabilized power supply OFF once and then ON. 3. FF, REW modes 1)Check for “2. Preset state” and push the FF switch and the REW switch. 2)Move the F/R switch (S702) to the movement of the slider t

17、o enter the FF/REW mode. 4. PLAY mode 1)Check for “2. Preset state”. 2)Push the nN switch on the remote commander to move the lever (SW) toward the R side. With timing to this, move the F/ R switch (S702) to enter the PLAY (R side) mode. Note 1: If failed, retry from the preset state. Note 2: The nN

18、, x, FF, and REW switches on the remote commander should be used whenever possible. MAIN BOARD (SIDE B) ? ? ? ? ? ? ? ? ? ? 4 Slider (NR) Rotational system 1. Rotational System of PLAY Mode2. Rotational System of FF Mode 3. Rotational System of REW Mode F side flywheel F sidecenterR side slider (NR)

19、 motor pulley gear (reel) (T side) gear (reel) (S side) idler gear (A) (T side) idler gear (A) (S side) gear (NR) FWDREV idler gear (B) gear (Y) clutch assy (F) reverse pulley flywheel (R) assy flywheel (N) assy motor pulley gear (FR) gear (reel) (T side) idler gear (A) (T side) reverse pulley flywh

20、eel (R) assy flywheel (N) assy gear (Y) clutch assy (F) gear (reel) (S side) idler gear (A) (S side) motor pulley gear (FR) gear (Y) clutch assy (F) reverse pulley flywheel (R) assy flywheel (N) assy ? ? ? ? ? ? ? ? ? ? 5 SECTION 3 DISASSEMBLY Lid Assy, CassetteCase Block Assy Ornament (OPEN) Block

21、Assy Switch, Leaf (S704) Main Board Belt (F0), Motor (M601)Set Holder AssyPinch Lever (N2)/(R2) AssyMagnetic Head (HP701) Note :Follow the disassembly procedure in the numerical order given. The equipment can be removed using the following procedure. 3-1. LID ASSY, CASSETTE 3-2. CASE BLOCK ASSY 3 4

22、1 Two screws (M1.4 2.5) 2 Screw (M1.4 2.5) Lid assy, cassette Mechanism deck block 3 Two screws (M1.4 2.5) 4 Screw (M1.4 1.6) 5 2 Two screws (M1.4 2.5) Case block assy 1 Lid, battery case Claw ? ? ? ? ? ? ? ? ? ? 6 3-3. ORNAMENT (OPEN) BLOCK ASSY 3-4. “SWITCH, LEAF (S704)”, MAIN BOARD Mechanism deck

23、 block Ornament (open) block assy 2 1 1 3 Screw (M1.7 3) 5 Screw (M1.4 2) 1 Screw (M1.7 3) 4 Unsolder the 4 places. 7 Unsolder the plunger. 0 Claw 6 Switch leaf (S704) 2 Screw (M1.4 1.4) qa MAIN board 8 Unsolder the flexible board. 9 Unsolder the motor. ? ? ? ? ? ? ? ? ? ? 7 2 Two screws (M1.4 2.7)

24、4 Motor (M601) 3 Retainer (F1) motor 1 Belt (F0) Belt (F0) 3-5. BELT (F0), MOTOR (M601) 3-6. HOLDER ASSY 8 Screw (M1.4 2) qa Remove soldering from Head flexible board. 0 Bracket (cassette) assy 9 Shaft 6 Shaft 5 Two screws (M1.4 1.6) 7 Lock lever (B)/M qd Remove the holder assy in the direction of t

25、he arrow. 2 Screw (M1.4 1.6) qs Head flexible board 3 Spring hook 1 Tension spring 4 Tension spring ? ? ? ? ? ? ? ? ? ? 8 3-7. PINCH LEVER (N2)/(R2) ASSY 3-8. MAGNETIC HEAD (HP701) Claw Claw 1 Remove the pinch lever (R2) assy in the direction of the arrow. Note:Be careful of the claw 2 Remove the pi

26、nch lever (N2) assy in the direction of the arrow. Note:Be careful of the claw 5 Remove the magnetic head (HP701) in the direction of the arrow. 1 Remove the spring (HD2). 2 Remove the spring (HDA). 3 Remove the seat (H). Head lever 4 Remove the head lever while the magnetic head (HP701) is kept att

27、ached. ? ? ? ? ? ? ? ? ? ? WM-EX2000 9 10 11 SECTION 6 DIAGRAMS 6-1. BLOCK DIAGRAM SECTION 4 MECHANICAL ADJUSTMENTS PRECAUTION 1.Clean the following parts with a denatured-alcohol-moistened swab : playback headpinch roller capstanrubber belt 2.Demagnetize the playback head with a head demagnetizer.

28、3.Do not use a magnetized screwdriver for the adjustments. 4.The adjustments should be performed with the rated power supply voltage (DC 1.3 V) unless otherwise noted. Torque Measurement SECTION 5 ELECTRICAL ADJUSTMENT PRECAUTION Supplied voltage: 1.3 V Switch and control position VOL switch: NORM R

29、emote control position HOLD switch: OFF VOL control: MAX SOUND mode : NORM DOLBY mode : OFF Test tape Tape Speed Adjustment Procedure : 1.Playback WS-48A (tape center part) in the FWD state and adjust RV601 so that the frequency counter reading becomes 3,000 Hz. Specification Value : 2.Check that fr

30、equency counter reading is within 2% of reading of step 1. Adjustment Location : Digital frequency counter 2,985 to 3,015 Hz Type WS-48A Signal 3 kHz, 0 dB Used for tape speed adjustment ModeTorque MeterMeter Reading 1.47 2.45 mN m FWD CQ-102C (15 25 g cm) FWD0.03 0.20 mN m back tension(0.3 2.0 g cm

31、) 1.47 2.45 mN m REV CQ-102RC (15 25 g cm) REV0.03 0.20 mN m back tension(0.3 2.0 g cm) more than 3.43 mN m FF, REWCQ-201B (more than 35 g cm) + i test tape WS-48A (3 kHz, 0 dB) set REMOTE jack (J301) 32 frequency counter RV601 AMS IN DOLBY CTL BOOST CTL F/R CTL SURRUND CTL MEGA BASS CTL XT0 XT1 CAS

32、SETE SW PHOTO CTL PHOTO (T) IN 39 BEEP36 20 48 8 RV CTL7 10 9 28 29 5 19 38 PHOTO (S) IN39 SPEED DTL18 MOTOR START41 MOTOR U47 MOTOR V46 MOTOR W45 CTRL 144 CTRL 243 MOTOR DIR42 40 X701 32.768kHz MUTE CTL12 SURROUND SWITCH Q308 SURROUND SWITCH Q310 SURROUND SWITCH Q313 PLUNGER DRIVER Q701 RESET IC704

33、 MB 0.2V/div 5sec/div 150 Hz 150 Hz 4 Q603 135 0.5V/div 5sec/div 6 IC701 5 1V/div 5sec/div 100 kHz 7 IC702 wk 1V/div 0.2sec/div 4 MHz ? ? ? ? ? ? 21 6-5. IC BLOCK DIAGRAMS IC301 TA2123AF + + AGC DET BST PWC PWB + PWA + + + + TOMP RIPPLE FILTER MIX MTL DRV VREF PREA PREB BEEP SW 36 35343332 31302928

34、27 2625 24 22 21 20 19 18 17 16 15 14 13 23 121110987653214 48 47 46 45 44 43 42 41 40 39 38 37 AGC DET AGC IN BST NF BST OUT PW IN C LPF EQ L PW NF L PW IN L PW IN R PW NF R EQ R RF IN PW GND PW OUT R PW OUT C PW OUT L VCC BASE RF OUT GND AMS DET AMS MIX AMS IN VREF IN PRE GND M/N SW PRE SW F/R SW

35、BST SW PW SW NT SW AMS OUT BEEP MT TC CAMP SW AMS IN PRE NF-R PRE OUT-R MTL DRV-R MTL DRV-L PRE OUT-L PRE NF-L REV IN-L REV IN-R REF OUT FWD IN-R FWD IN-L IC701 XC6383C251ML + + BIAS CIRCUIT WEIGHT G2G1V/I ACH BLOCK GM SUN BCH BLOCK (SAME ACH) 141312111098 1234567 GNDIREFVREFINBOUT BDC BDET B VCCSWV

36、EXTIN AOUT ADC ADET A IC303 NJM2185AV IC302 NJM2190V 9 LIN VREF C3 GND C4 MODE ROUT REFIN WOUT C2 V+/2 V+ LOUT C1 WIN RIN 10111213141516 15234678 + EXT FILTER MATRIX MODE CONTROL BIAS BYPASS BYPASS SRS SRS 3 1 BUFFER PWM/PFM CONTROL OSC 50/100/180 kHz VLx LIMITER PHASE COMP V REF SLOW START 2 Lx Vss

37、 V OUT ? ? ? ? ? ? ? ? ? ? 22 IC601 LB1994M DECODER CTRL BLOCK POWER D/DTPULSE BUFFER COMPARATORBUFFERVI COMPARATOR SOFT CLIP CURRENT AMP P-SIG PWSW 45612978 14 15 16 17 18 19 2021222423252627 30 29 28 36 35 34 33 32 31 WSMC U IN 3 VCC V IN W IN CTRL1 CTRL2 DIR VS US U OUT NC V OUT W OUT WT VT UT PG

38、ND FC CT2 CT1 IR ICI2 ICI1 I SOFT M CENTER GND VI2 VI1 IV VC 13PW 12CI 11Vref 10P SIG IC703 MM1305BWBE + + + + 1 2 3 4 8 7 6 5 VCC CE RIPPLE GND OUT 1 OUT 2 OUT 3 OUT 4 ? ? ? ? ? ? ? ? ? ? 23 6-6. IC PIN FUNCTION DESCRIPTION IC705 ML63514-023TBZ060 (SYSTEM CONTROL) Pin No. 1 2 3 4 5 6 7 8 9 10 11 12

39、 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 I/O O I I I I I/O O O O O O O I I I I O O O O I O I I I O I O I I I I O O O O O O O O Description Audio ATT circuit control output. L=OFF. H=ON (during CUE/REVIEW) MD MODE SW (FWD). L=ON MD M

40、ODE SW (CENTER). L=ON MD MODE SW (RVS). L=ON Cassette detection switch input. L= Exists. H=Not exist. Data output for communication. Remote control inspection input terminal. Tone control. H=REVIVE ON. L=OFF/MB/GRV/SUR Tone control. H=MB/REV ON. L=OFF/GRV/SUR Head switching output. L=FWD. H=RVS Tone

41、 control. H=BOOST ON. L=OFF Audio circuit/DDC control output. H=POWER ON Audio muting control output. L=MUTE ON A/B-side detection SW input. L=FWD: Side A Input for switching between two models. L=EX2000. H=EX910 Input terminal for power supply voltage detection Operation button signal, input termin

42、al Plunger solenoid control output. L=ON Motor speed 1/2 control output. L=Normally. Open=During 1/2 time speed Rotation detection intermittent output. L=ON Dolby circuit control output. L=ON External interface power supply (P8 power supply) terminal Power supply terminal of negative polarity side P

43、ower supply terminal of positive polarity side Pressure power supply terminal for backup External capacitor for step-up power supply is connected to this terminal. External capacitor for step-up power supply is connected to this terminal. Power supply terminal of positive polarity side for internal logic External crystal oscillator External crystal oscillator Test input terminal Test input terminal External capacitor for oscillation is connected to this terminal. External resistor for high-speed CR oscillator (550 kHz) is connected to this terminal. External resistor for high-speed