索尼SONY WM-FX477电路图.pdf

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1、 1 MICROFILM SERVICE MANUALUS Model Canadian Model AEP Model E Model Chinese Model WM-FX477/FX479 RADIO CASSETTE PLAYER Photo: WM-FX477 Radio section Frequency range FM: 65 74/87.5 108 MHz (East European) 87.5 108 MHz (Except East European) AM:530 1,710 kHz (US, Canadian) 531 1,602 kHz (Except US, C

2、anadian) Tape section Frequency response (Dolby NR off) Playback: 30 14,000 Hz Output Headphones/earphones (2 jack) Load impedance 8 300 ohms General Power requirements 3 V DC batteries R6 (AA) 2/ External DC 3 V power sources Dimensions (w/h/d) Approx. 115.8 85 33.4 mm (4 5/8 3 3/8 1 3/8 inches) in

3、cl. projecting parts and controls Mass Approx. 175 g (6.2 oz.)/Approx. 255 g (9.0 oz.) incl.batteries and a cassette Supplied accessories Stereo headphones or Stereo earphones (1) Carrying case (1) Design and specifications are subject to change without notice. SPECIFICATIONS Model Name Using Simila

4、r MechanismWM-FX483 Tape Transport Mechanism TypeMF-WMFX483-147 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. Dolby noise reduction manufactured under license from Dolby Labo- ratories Licen

5、sing Corporation. “DOLBY” and the double-D symbol a are trademarks of Dolby Laboratories Licensing Corporation. Ver 1.0 1999. 02 ? ? ? ? ? ? ? ? ? ? 2 TABLE OF CONTENTS 1. GENERAL. 3 2. DISASSEMBLY 2-1. Cabinet (Front) Assy . 5 2-2. Display Board . 6 2-3. Holder (Sub) Assy, Cassette . 6 2-4. Main Bo

6、ard . 7 2-5. Mechanism Deck. 7 2-6. Belt and Motor . 8 3. MECHANICAL ADJUSTMENTS. 9 4. ELECTRICAL ADJUSTMENTS Tape Section . 9 Tuner Section. 10 5. DIAGRAMS 5-1. IC Pin Description. 12 5-2. Block Diagram . 14 5-3. Schematic Diagram Main Section. 16 5-4. Printed Wiring Board Main Section . 19 5-5. Pr

7、inted Wiring Board Display Section . 21 5-6. Schematic Diagram Display Section. 23 6. EXPLODED VIEWS 6-1. Cabinet Section . 26 6-2. Tape Mechanism Deck Section . 28 7. ELECTRICAL PARTS LIST. 29 ? ? ? ? ? ? ? ? ? ? 3 SECTION 1 GENERALThis section is extracted from instruction manual. ? ? ? ? ? ? ? ?

8、? ? 4 ? ? ? ? ? ? ? ? ? ? 5 B C D E F G H I J K S701 cabinet (front) assy A cabinet (front) assy 2 screw (1.7x2.5), tapping 1 screw (1.7x2.5), tapping holder (sub) assy, cassette Cabinet (front) assySetMain board Holder (sub) assy, cassette Belt and MotorMechanism deckDisplay board SECTION 2 DISASSE

9、MBLY 2-1. CABINET (FRONT) ASSY Note : When installing, fit the knobs and switches. 3Insert the precision screwdriver (1.4 mm flat-blade) into the slit at claw A and release the claw. 4Remove the cabinet (front) assy. (Release all claws B to K in alphabetical order.) The equipment can be removed usin

10、g the following procedure. Note : Follow the disassembly procedure in the numerical order given. Note :When removing the cabinet, put cloth on the end of a screwdriver or use a polyacetal driver to avoid damage to the cabinet. ? ? ? ? ? ? ? ? ? ? 6 1 Open the holder (sub) assy, cassette. 4 holder (s

11、ub) assy, cassette A B 5 spring (torsion) 2 four claws 3 DISPLAY board 1 screws 2-2. DISPLAY BOARD 2-3. HOLDER (SUB) ASSY, CASSETTE 2Insert a precision screwdriver (1.4 mm flat-blade) vertically into portion A to release the hinge plate. 3Portion B to release the hinge plate. ? ? ? ? ? ? ? ? ? ? 7 5

12、 three claws 4 three claws 1 HEAD FLEXIBLE board (CN303) 2 Unsolder the 4 places. 3 screw (M1.4x2.0), locking 6 MAIN board switch slider 2-5. MECHANISM DECK 2-4. MAIN BOARD Note : When installing, fit the switch and slider. 2 Insert the precision screwdriver (1.4 mm flat-blade) into the slit and rel

13、ease three claws. 4 Remove the mechanism deck in the direction of the arrow. 1 screw 3 three claws ? ? ? ? ? ? ? ? ? ? 8 1 belt 3 motor wheel assy (SP), capstan belt How to apply the belt M901 2 two screws (screw (M1.4), special head) 2-6. BELT AND MOTOR ? ? ? ? ? ? ? ? ? ? 9 RV601 0000 2 jack (J301

14、) digital frequency counter set 16 test tape WS-48A (3 kHz, 0 dB) PRECAUTION Supplied voltage : 2.5V Control position VOL control : maximum Test Tape TypeSignalUsed for WS-48A3 kHz, 0 dBtape speed adjustment TAPE SECTION 0 dB = 0.775 V Tape Speed Adjustment Procedure: PRECAUTION 1.Clean the followin

15、g parts with a denatured-alcohol-moistened swab : playback headpinch lever assy capstan wheel assyrubber belt 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 adj

16、usted. 5.The adjustments should be performed with the rated power supply voltage (2.5 V) unless otherwise noted. Torque Measurement ModeTorque meterMeter reading FWDCQ-102C 20 42 g cm (0.28 0.58 oz inch) FWD CQ-102C less than 2 g cm Back Tension(less than 0.03 oz inch) REVCQ-102RC 20 42 g cm (0.28 0

17、.58 oz inch) REV CQ-102RC less than 2 g cm Back Tension(less than 0.03 oz inch) FF, REWCQ-201B more than 60 g cm (more than 0.83 oz inch) SECTION 4 ELECTRICAL ADJUSTMENTS SECTION 3 MECHANICAL ADJUSTMENTS 1.Playback WS-48A (tape center part) in the FWD state and adjust RV601 so that the frequency cou

18、nter reading becomes 3,000 Hz. Specification Value: Digital frequency counter 2,985 to 3,015 Hz 2.Playback WS-48A (tape center part) in the REV state. Check that the frequency counter reading is within 1.0% of the reading of step 1. Adjustment Location: ? ? ? ? ? ? ? ? ? ? 10 2 jack (J301) set 16 le

19、vel meter (range: 0.5-5 V ac) Put the lead-wire antenna close to the set. AM RF signal generator digital voltmeter TP (VT) Main board 2 jack (J301) set 16 level meter (range: 0.5-5 V ac) FM RF signal generator 0.01 F (FM RF IN) Main board (GND) digital voltmeter TP (VT) Main board Repeat the procedu

20、res in each adjustment several times, and the tracking adjustment should be finally done by the trimmer ca- pacitors. AM IF ADJUSTMENT Adjust for a maximum reading on level meter. T1 1,000 (999) kHz ( ): Except US, Canadian model AM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L2

21、CT1 620 (621) kHz1,400 (1,395) kHz ( ): Except US, Canadian model TUNER SECTION 0 dB = 1 V FM Section Setting: RADIO ON/BAND switch : FM FM Tuning Voltage Adjustment FM TUNING VOLTAGE ADJUSTMENT Adjust for a 9.0 (14.5 0.5) Vdc reading on digital voltmeter. L3 108 MHz FM Tracking Adjustment Modulatio

22、n: 1 kHz, 75 kHz dev. (100%) Output level: as low as possible FM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L1 87.5 (65.0) MHz ( ): East European model +0.5 0 AM Section Setting: RADIO ON/BAND switch : AM AM Tuning Voltage Adjustment AM TUNING VOLTAGE ADJUSTMENT Adjust for a 1.

23、4 0.1 Vdc reading on digital voltmeter. L4 530 (531) kHz ( ): Except US, Canadian model AM IF Adjustment, AM Tracking Adjustment Modulation: 400 Hz, 30% Output level: as low as possible ? ? ? ? ? ? ? ? ? ? 11 (VT) (FM RF IN) FM RF IN VT L3 FM TUNING VOLTAGE ADJUSTMENT L1 FM TRACKING ADJUSTMENT L4 AM

24、 TUNING VOLTAGE ADJUSTMENT T1 AM IF ADJUSTMENT CT1 AM TRACKING ADJUSTMENT L2 Adjustment Location: main board Measurement Points: main board main board (side B) main board (side A) ? ? ? ? ? ? ? ? ? ? 12 5-1. IC PIN DESCRIPTION IC701 TC9327F-113 (SYSTEM CONTROL/LCD DRIVE) Pin No.Pin NameI/OPin Descri

25、ption 1 4COM1 4OLCD driver common output 5 22S1 18OLCD driver output 23MOTOR DIROMotor rotation direction control output (FWD: L, REV: H) 24MOTOR CTLOMotor ON/OFF control output (OFF: L, ON: H) 25MOTOR SPEEDOMotor speed control output (Normally: L, Speed down: H) 26MOTOR BRKOMotor brake control outp

26、ut (Brake OFF: L, Brake ON: H) 27PHOTO CTLOPhoto reflector rotation detection control output 28DOLBYODOLBY control output (ON: L, OFF: H) 29FWD/REVOPlayback head input select output (REV: L, FWD: H) 30AVLSOAVLS control output (AVLS OFF: L, AVLS IN: H) 31FM MODEOLOCAL/DX control output (DX: L, LOCAL:

27、 H) (US, CND, 5E, 6E only) 32TAPE SELECTOTape select control output (Normal: L, CrO2/METAL: H) 33PHOTO INIPhoto reflector rotation detection input 34 37K0 3IKey input 0 3 38 41KO0 3OKey output 0 3 42BATT DETIPower supply voltage detection input (A/D input) 43HOLDIHOLD input 44AD IN3INot used in this

28、 set. 45AD REFIReference voltage of pin 43 and 44. 46AMP CTLOAMP control output (AMP OFF: L, AMP ON: H) 47MEGA BASSOMEGA BASS control output (ON: L, OFF: H) 48OPENIOPEN detection input (Open: L, Close: H) 49BEEPOBEEP output 50VER1IDestination select input (Fixed at “L” (except EE, E, 9E) or “H” (EE,

29、 E, 9E) in this set.) 51VER2I Destination select input (Fixed at “L” (US, CND, E, 5E, 6E, 9E) or “H” (AEP, FR, EE, CEV, CH) in this set.) 52VER3IDestination select input (Fixed at “L” in this set.) 53MBSETIMEGA BASS with/without detection input (Fixed at “L” in this set.) 54DLBSETI DOLBY with/withou

30、t detection input (Fixed at “L” (WM-FX477) or “H” (WM-FX479) in this set.) 55REV SWIMechanism deck mode detection switch input (REV ON: H) 56REW SWIMechanism deck mode detection switch input (REW ON: H) 57FF SWIMechanism deck mode detection switch input (FF ON: H) 58FWD SWIMechanism deck mode detect

31、ion switch input (FWD ON: H) 59BANDOBAND select output (AM: L, FM: input) 60RADIO ONORADIO ON/OFF control output (OFF: L, ON: H) 61IF REQOIF request output (Auto scan: L, Normally: H) 62MUTEOMute signal output (OFF: L, ON: H) 63NCNot used. 64IF INIIF input 65EOONot used in this set. 66NCOError out s

32、ignal output 67HOLDFixed at “H” in this set. 68NCNot used. 69GNDGround 70VCO FMIVCO (FM) input 71VCO AMIVCO (AM) input 72VDDPower supply pin 73RESETReset input 74XOUTCrystal oscillator output (75 kHz) 75XINCrystal oscillator input (75 kHz) SECTION 5 DIAGRAMS ? ? ? ? ? ? ? ? ? ? 13 14 15 WM-FX477/FX4

33、79 Pin No.Pin NameI/OPin Description 76VXTStabilized capacitor connection of crystal oscillation power supply. 77VLCDLCD driver power rising pressure pin 78, 79C1, 2LCD driver power rising pressure pin 80VEE1.5 V constant voltage power supply for LCD driver. 5-2. BLOCK DIAGRAM D1 D401 L OUT R OUT VC

34、C QUAD OSC OUT FM/AM RF, IF, MPX IC1 12 11 FWD58 FF57 5 10 CF2 10.7MHz X1 TUNER VCC R CH R CH L HP901 PB HEAD SWITCH Q2 L.P.F Q701,702 TAPE SPEED RV601 SYSTEM CONTROL/ LCD DRIVE IC701 AMP Q751 TUNER VCC CF1 450kHz L1 FM RF T1 AM IFT BATT+B 13 DC/DC CONV. Q401,T401 RIPPLE FILTER Q51,52 RADIO+B SWITCH

35、 Q53 VCO BUFFER Q703 FWD/REV SWITCH Q301 NF LEVEL SWITCH Q101 POWER SWITCH Q753 POWER AMP SW Q304 AMP CONT Q305 ON/OFF MIX IN(L) H.PIN(L) FX479 FX477 DOLBY NR IC331 MIX OUT FM RF IN2 4 S/S MOTOR SERVO IC301(2/2) 3 IN+ 35 M-V REF 34 DR 43 UOUT VOUT WOUT FM IF IN7 AUDIO POWER AMP IC301(1/2) REV IN(L)

36、FWD IN(L) NF SYSTEM 6 15 AM IF IN6 FM RF24 FM OSC21 AM OSC20 AM RF22 LPF114 LPF213 IF REQ17 FM MODE 31 IF REQ K0-0 K03 HOLD 43 OPEN DET 48 BATT IN 38 BATT DET 42 VDD 72 RESET 73 AD REF 45 AMP CTL PHOTO CTL PHOTO IN 33 MOTOR DIR MOTOR SPEED MOTOR CTL X OUT X IN SYS CONT HOLD S701 S301 (OPEN DET) S601

37、 (MD CONT) US,CND,C&SA MODEL US,CND,C&SA MODEL FUNCTION KEY S702-715 B+ OFF ON B.P.F MUTE Q306 FL1 DC IN 3V J302 DRY BATTERY SIZE AA (IEC DESIGNATION R6) 2PCS, 3V D2 L3 FM OSC L4 AM OSC D3 CT1 DOLBY B+ SWITCH Q331 REW56 REV D731 55 FWD FF REW RVS B+ BATT+B PH751 +B L2 AM FERRITE-ROD ANTENNA R FWD R

38、CH L R REV REF + 9 105 POWER MUTE 21 +B DOLBY +B 19 45 REG IC702 1 30 28 L.B-SW32 MIX OUT(L) VOL RV301 24 POWER IN(L) PWR R-CH COM L CH R CH 22 POWER OUT(L) 16 POWER OUT(COM) 18 J301 3841 522 S1 S18 X701 75kHz Q607 BATT+B M901 CAPSTAN/ REEL MOTOR 14 COM1 04 ND701 LIQUID CRYSTAL DISPLAY PANEL COM4 K0

39、 K3 3437 BEEP 49 AVLS 30 MEGA BASS 47 MUTE 62 DOLBY 28 RADIO ON 60 FWD/REV 29 TAPE SELECT 32 VCO AM 71 VCO FM 70 IF IN 6461 EO 65 BAND 59 3 46 PHOTO REFLECTOR Q752 MOTOR DIRECTION Q602 MOTOR SPEED SW Q603 BRAKE SWITCH Q604-606 277475 39 41 232524 MOTOR BRK 26 40 R-CH AVLS CONTROL Q303 (1/2) L701 RCH: same as L-CH Signal path : FM : AM : PB T1 AM IF L1 FM TRACKING L3 FM TUNING VOLTAGE L4 AM TUNING VOLTAGE CT1,L2 AM TRACKING Abbreviation CND : Canadian model C&SA : Central and South America model ? ? ? ? ? ?