索尼SONY WM-FX488电路图.pdf

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1、WM-FX488 SERVICE MANUAL SPECIFICATIONS E Model Chinese Model Model Name Using Similar MechanismNEW MD Mechanism TypeMF-WMFX488-114 9-874-239-02 2003A0200-1 2003.01 Sony Corporation Personal Audio Company Published by Sony Engineering Corporation RADIO CASSETTE PLAYER Frequency range FM: 87.5 - 108 M

2、HzAM: 531 - 1602 kHz (9kHz step) AM: 530 - 1710 kHz (10kHz step) Power requirements 1.5V DC, battery AA (R6) x 1 Dimensions (w/h/d) Appr ox. 83.6 x 112.0 x 28.3 mm (3 38 4 12 1 18 inches) excl. projecting parts and controls Mass Appr ox. 138 g (4.9 oz) (main unit only) Supplied accessories Stereo he

3、adphones or Stereo earphones (1) Carrying case with belt clip(1) Design and specifications are subject to change without notice. Battery life* (approximate hours) Sony alkaline LR6 (SG)* Sony R6P (SR) Tape playback359 Radio reception4014 * Measured value by the standard of JEITA (Japan Electr onics

4、and Information Technology Industries Association). (Using a Sony HF series cassette tape) *When using a Sony LR6(SG) “ST AMINA” alkaline dry battery (produced in Japan). Note The battery life may be shorter depending on the operating condition, the surrounding temperature and battery type. Ver 1.1

5、2003.01 ? ? ? ? ? ? ? ? ? ? 2 WM-FX488 Specifications . 1 1.GENERAL. 2 2.DISASSEMBLY 2-1. Cabinet (Front), Cabinet (Center). 3 2-2. Main Board . 3 2-3. Mechanism Deck . 4 2-4. Belt, Capstan/reel Motor (M601), Magnetic Head (Playback) (HP601). 4 2-5. Holder, Cassette . 5 3.ADJUSTMENTS 3-1. Mechanical

6、 Adjustments. 6 3-2. Electrical Adjustments. 6 4.DIAGRAMS 4-1. Explanation of IC Terminals. 9 4-2. Block Diagram. 10 4-3. Printed Wiring Boards .11 4-4. Schematic Diagram Main Section (1/3) . 12 4-5. Schematic Diagram Main Section (2/3) . 13 4-6. Schematic Diagram Main Section (3/3) . 14 4-7. IC Blo

7、ck Diagrams . 15 5.EXPLODED VIEWS 5-1. Cabinet Section. 17 5-2. Mechanism Deck Section (MF-WMFX488-114) . 18 6.ELECTRICAL PARTS LIST. 19 Flexible Circuit Board Repairing Keep the temperature of the soldering iron around 270C during repairing. Do not touch the soldering iron on the same conductor of

8、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 reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be dam- aged by heat. TABLE OF CONTENTS SECTION 1 GE

9、NERAL NPLAY* M m VOL* MODEs/d i xSTOP DIRY ENTER AM FM RADIO OFF HOLD MENU SET PRESET/TUNING +/ * There is a tactile dot beside VOL on the main unit to show the direction to turn up the volume. * The button has a tactile dot. This section is extracted from instruction manual. ? ? ? ? ? ? ? ? ? ? 3 W

10、M-FX488 SECTION 2 DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. 2-1. CABINET (FRONT), CABINET (CENTER) 2-2. MAIN BOARD z The equipment can be removed using the following procedure. Main boardCabinet (center) Holder, Cassette Mechanism deckBelt, Capstan/reel motor

11、(M601) Magnetic head (playback) (HP601) Set Cabinet (front) Cabinet (front) Cabinet (center) Holder, Cassette 4 Claws 2 5 1 Claws 1 Claws 3 Claws 1 Claws Main board 4 Screw (M1.4 WH) 5 Screw S701 Hold knob Head flexible board 1 Remove solder (six places) 2 Remove solder (four places) 3 Lid, battery

12、case 6 z CAUTIONS DURING ASSEMBLY Align position of S701 and hold knob ? ? ? ? ? ? ? ? ? ? 4 WM-FX488 2-3. MECHANISM DECK 2-4. BELT,CAPSTAN/REEL MOTOR (M601), MAGNETIC HEAD (PLAYBACK) (HP601) Mechanism deck Cabinet (center) 1 Claws 2 Wheel ASSY (P), capstan Wheel ASSY (P), capstan Belt How to apply

13、the belt Capstan/reel motor (M601) 1 Belt 5 Magnetic head (PLAYBACK) (HP601) 3 Capstan/reel motor (M601) 4 Two screws (M1.4) 2 Two screws (M1.4) Mechanism deck ? ? ? ? ? ? ? ? ? ? 5 WM-FX488 1Insert the spring (torsion) to the slot as shown in the figure. 2,3 Insert the hinge of the “ Holder cassett

14、e ”. 4Close the “Holder, cassette” then press it. 2-5. “HOLDER, CASSETTE z CAUTIONS DURING ASSEMBLY Holder, Cassete 1 5 Hinge Hinge Hinge Projection Hinge Projection 3 Move the hinge away from projection 2 Move the hinge away from projection 4 Spring (torsion) 2 Spring (torsion) Spring 2 Hinge 3 Hin

15、ge Holder, cassette 4 ? ? ? ? ? ? ? ? ? ? 6 WM-FX488 3-1. 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. Do not use a magnetized screwdriv

16、er for the adjustments. 3. These measurement and adjustment should be performed with the rated power supply voltage (1.3 V) unless otherwise noted. Torque Measurement ModeTorque meterMeter reading FWD 1.97 4.11 mN m 20 42 g cm (0.28 0.58 oz inch) FWD CQ-102C less than 0.19 mN m less than 2 g cm back

17、 tension (less than 0.027 oz inch) 1.97 4.11 mN m REV20 42 g cm (0.28 0.58 oz inch) REV CQ-102RC less than 0.19 mN m less than 2 g cm back tension (less than 0.027 oz inch) FF, REWCQ-201B more than 5.89 mN m more than 60 g cm (more than 0.84 oz inch) SECTION 3 ADJUSTMENTS 3-2. ELECTRICAL ADJUSTMENTS

18、 PRECAUTION Supplied voltage : 1.3V. Switch and control position (MENU display) MEGA BASS : OFF VOLUME control (RV301) : maximum AVLS : OFF (No indicated) FM MODE : STEREO (No indicated) TAPE SECTION Test Tape TypeSignalUsed for WS-48A3kHz, 0dBTape Speed Adjustment Tape Speed Adjustment Procedure :

19、1. Playback WS-48A (tape center part) in the FWD state and ad- just RV601 so that the frequency counter reading becomes 3,000Hz. Standard value : 2,9853,015Hz 2. Playback WS-48A (tape center part) in the REV state. Check that frequency counter reading is within 1.0% of the reading of step 1. Adjustm

20、ent Location : 0 dB = 0.775V set test tape WS-48A (3kHz, 0dB) frequency counter 16 phones jack (J301) MAIN BOARD (SIDE B) RV601 : Tape speed adjustment ? ? ? ? ? ? ? ? ? ? 7 WM-FX488 AM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L4621kHz (620kHz) CT11,395kHz (1,400kHz) FM FREQU

21、ENCY COVERAGE CONFIRMATION Frequency displayReading on digtal voltmeter Confirmation108MHzStandard value : 8.775 to 8.925V FM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L287.5MHz Confirmation108MHz TUNER SECTION AM Section BAND : AM FM Section BAND : FM ( ) : 10kHz step AM FREQ

22、UENCY COVERAGE ADJUSTMENT Adjust partsFrequency display Reading on digtal voltmeter L5531kHz (530kHz)Standard value : 0.9 1.25V Adjustment Location : Main board (See page 8) 0 dB = 1V Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should b

23、e finally done by the trimmer capacitors. AM RF signal generator 30% amplitude modulation by 400Hz signal. Output level : as low as possible Put the lead-wire antenna close to the set. set 16 phones jack (J301) level meter Frequency Coverage Adjustment Setting : CT1 IC1 R11 R16 C1 C3 C10 C12 L1 C5 R

24、1 C44 C2 C15 TP30 D1 C24 C30 R9 R8 R40 C23 1 15 FM RF signal generator 33.75kHz frequency deviation by 1kHz signal. Output level : as low as possible TP30 0.01F MAIN BOARD (SIDE A) IC1 R16 C17 C4 C28 C21 C3 C10 2 L3 D3 R6 C712 C11 TP12(VT) C18 FB1 16 30 MAIN BOARD (SIDE A) TP12 (VT) digital voltmete

25、r (DC range) Ver 1.1 2003.01 ? ? ? ? ? ? ? ? ? ? 8 WM-FX488 Adjustment Location : MAIN BOARD (SIDE A) IC1 TP30 TP12 (VT) L5 : AM Frequency Coverage Adjustment L2 : FM Tracking Adjustment L4 : AM Tracking Adjustment CT1 : AM Tracking Adjustment TP30 : FM Sgnal input ? ? ? ? ? ? ? ? ? ? 99 WM-FX488 Pi

26、n No.Pin nameI/ODescription SECTION 4 DIAGRAMS 4-1. EXPLANATION OF IC TERMINALS IC701 TC9329FA-CFX1740 (SYSTEM CONTROL) 1 to 4COM 1 to 4OLCD common drive 5 to 19S 1 to 15OLCD segment drive 20S0ONot used (OPEN) 21 to 22K01 to 02OKey output 23 to 26K 1 to 4IKey input 27VDDPower supply 28BEEPOBeep sign

27、al output 29FWD/REV CTLOFWD/REV head selection output 30BAND1OTuner mode selection output 31BAND2OTuner mode selection output 32AMP CTLOAmplifier B+ switch ON/OFF control signal output 33NCNot used (OPEN) 34BATT CHECKIBattery voltage check terminal 35IF IN 1ITuner IF frequency input 36HOLD SWIHold s

28、witch input 37GNDGround 38OSC INITuner OSC frequency input 39VDDPower supply terminal 40DO (OT)OTunning data output 41VREGCapacitor connection terminal 42IF REQOIF request output for tuner 43TAPEITape power switch input 44RADIO ONOTuner ON/OFF output 45LOCAL/DX,OTuner sensitivity/tape type selection

29、 output STEREO/MONO 46FWD/REV SWIFWD/REV switch input 47P-CTLOPower switch ON/OFF output 48MODEL1IDistination select terminal 49MODEL2IDistination select terminal 50PRE CTLOPRE mute output 51MUTE CTLOPRE mute signal output 52MB CTLOMegabass control signal output 53AVLS CTLOAVSL control signal output

30、 54RESETIReset signal input 55X-OUTOSystem clock output (75kHz) 56X-INISystem clock input (75kHz) 57GNDGround terminal 58VDBCapacitor conection terminal 59C1Capacitor conection terminal 60C2Capacitor conection terminal 61VEECapacitor conection terminal 62C3Capacitor conection terminal 63C4Capacitor

31、conection terminal 64VLCDCapacitor conection terminal Note on Schematic Diagram All capacitors are in F unless otherwise noted. pF: F 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. f: internal component. : B+

32、 Line. H : adjustment for repair. Power voltage is dc 1.5V and fed with regulated dc power supply from battery terminal. Voltages and waveforms are dc with respect to ground under no- signal (detuned) conditions. no mark : FM (RADIO SECTION), PLAY (TAPE SECTION) () : AM Voltages are taken with a VOM

33、 (Input impedance 10 M). Voltage variations may be noted due to normal production toler- ances. Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal production toler- ances. Circled numbers refer to waveforms. Signal path. F: FM f: AM E: PB Abbreviation CH: Chinese

34、E: No indication of country of origin 6E: Indication of country of origin Note on Printed Wiring Board X : parts extracted from the component side. a: Through hole. : Pattern from the side which enables seeing. (The other layers patterns are not indicated.) Caution: Pattern face side:Parts on the pa

35、ttern face side seen from the (Side B)pattern face are indicated. Parts face side:Parts on the parts face side seen from the (Side A)parts face are indicated. Abbreviation CH: Chinese E: No indication of country of origin 6E: Indication of country of origin z Waveforms 1 IC701 tg VOLT/DIV : 1V AC TI

36、ME/DIV : 5 sec X-OUT 2.9 Vp-p 75 kHz 2 Q401 C VOLT/DIV : 5V AC TIME/DIV : 0.2 sec 16 Vp-p 0.4 sec Ver 1.1 2003.01 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 1010 WM-FX488 5 81213 10 29 FM DET AM DET 24 25 28 27 FM OSC 1/8 or 1/16 AM MIX AM OSC Q302 REF Q401 OSC MUT

37、E RF & RET Q701,702 LPF SW 16 15 14 21 22 19 23 726 20 45 30 31 35 38 44 40 53 52 82919 10 22 7 42 26 19 - 51 - 4 25 24 23 22 21 36 49 48 54 56 55 28 11 9 1251 13 29 46 43 34 50 47 32 VDD VCC VBAT Q705 Q704 54 OUTVCC 2118 30 4 1 5 2516 16 26 VBAT VBAT VCC W START V U W COM V U VCC L-CH R-CH FWD R-CH

38、 L-CH REV 3 1 2 DRIVER CONTROL PRE DRIVER FM MPX FM/AM/TV PW SW 10 7 8VREF L2 FM- RF L2 FM TRACKING CT1,L4 AM TRACKING L3 FM- OSC L5 AM-OSC L5 AM FREQUENCY COVERAGE L4 AM BAR ANTENNA D2 X1 (FM DISC) D3 QUAD CT1 D1 AM RF IN FM/TV OSC FMRFOUT IF BAFF FM RF IN FM- IF IN DET OUT MPX IN R-CH JC2 E, CH E,

39、 CH 6E AM- MIX AM- IF IN AM B/P AM OSC (VT) OSC BUFF CF3 (AM-IF) D402 VBATT Q402 Q703 VREF Q101 Q305 AVLS IC301 PRE/POWER AMP Q201 Q202 Q102 VCCRF VCC T401 T401,Q401 DC/DC CONVERTER INA INB RF OUT VREF BASE VCC VREF Q301 INV. PRE OUTA PRE OUTB RV301 VOL R-CH PW IN A PW IN C BST OUT BST SW PW NFA PW

40、NFB OUTA OUTC PW MUTE PRE MUTE R-CH MUTE CTL FWD/REV CTL FWD/REV SW BATT CHECK TAPE PRE CTL P-CTL AMP CTL Q707 D701 IC701 (2/2) SYSTEM CONTROL IC703 RESET CF1 (FM IF) IC1 FM/AM FRONT END IF DET, FM MPX IC701 (1/2) SYSTEM CONTROL IC601 CAPSTAN/REEL MOTOR DRIVE LOUT ROUT LPF1 REQSW OSC OUT MODE-1 MODE

41、-2 IF COUNT STEREO/MONO, LOCAL/DX IFJN1 IF-REQ BAND1 BAND2 OSCIN RADIO ON DO(OT) AVLS CTL MB CTL VDD VDD 6E 6E E, CH VDD S2 I S16 COM1 I COM4 K4 K3 K2 K1 KO2 KO1 HOLD SW MODE2 MODE1 RESET X-OUT X-IN BEEP Q303 EQ SWITCH X701 75KHz R-CH R-CH 24 FM- MIX LCD701 LIQUID CRYSTAL DISPLAY S703 PRESET/TUNING-

42、 RV601 TAPE SPEED S710 PRESET/TUNING+ S706 ENTER S707 SET S707 MENU S707 FM S707 RADIO OFF S709 AM S701 HOLD ON OFF IN+ M601 CAPSTAN/REEL MOTOR S302 N/R SW S301 TAPE ON BATT 1.5V DRY BATTERY SIZEAA (IEC DESIGNATION LR6) 1PS,1.5V HP601 PLAY BACK HEAD J301 i FM MIX Signal Path : FM : AM : PB R-CH is omitted due to same as L-CH. 4-2. BLOCK DIAGRAMS Ver 1.1 2003.01 Abbreviation CH: Chinese E: No indication of country of origin 6E