索尼SONY WM-FS420RS电路图.pdf

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1、WM-FS420/FS420RS US Model Canadian Model WM-FS420/FS420RS AEP Model E Model WM-FS420 SERVICE MANUAL RADIO CASSETTE PLAYER SPECIFICATIONS Model Name Using Similar MechanismNEW Tape Transport Mechanism TypeMF-WMFS420-114 Radio FrequencyFM : 87.5 108 MHz AM : 530 1,710 kHz (North, Central and South Ame

2、rica) 531 1,602 kHz (Other countries) Power Requirements3 V DC Batteries R6 (AA) 2 Dimensions (w/h/d)Approx. 108.4 125.7 47.2 mm (4 3/8 5 1 7/8 inches) incl. projecting parts and controls MassApprox. 280 g (9.9 oz)/Approx. 355 g (12.6 oz) (incl. batteries and a cassette) Supplied Accessories Stereo

3、headphones or earphones (1) Belt clip (1) Battery charger (1) (FS420RS only) Rechargeable battery NC-WMAA, 1.2 V, 700 mAh, Ni-Cd (2) (FS420RS only) Rechargeable battery carrying case (1) (FS420RS only) Design and specifications are subject to change without notice. Ver 1.0 2000. 02 ? ? ? ? ? ? ? ? ?

4、 ? 2 TABLE OF CONTENTS 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 sold

5、ering 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. SECTION 1 GENERAL This section is extracted from instruction manual. 1. GENERAL 2 2. SERVICE NOTE3 3. DISASSEMBLY 3-1. Main Assembly 4 3-2. Chassis Su

6、b Assy5 3-3. Main Board and Mechanism Deck5 3-4. Belt 6 3-5. Head, Magnetic (HP901)6 4. MECHANICAL ADJUSTMENT 7 5. ELECTRICAL ADJUSTMENT7 6. DIAGRAMS 6-1. IC Block Diagrams 10 6-2. Block Diagram 11 6-3. Schematic Diagram 13 6-4. Printed Wiring Board 15 6-5. IC Pin Function Description 17 7. MEXPLODE

7、D VIEWS 7-1. Cabinet Assy Section 18 7-2. Main Board Section 19 7-3. Mechanism Deck Section-1 (MF-WMFS420-114) 20 7-4. Mechanism Deck Section-2 (MF-WMFS420-114) 21 8. ELECTRICAL PPARTS LIST22 ? ? ? ? ? ? ? ? ? ? 3 SECTION 2 SERVICE NOTE WATER PROOF SECTION Note: In case the parts in the figure are r

8、emoved for repair, treat them to protect from water drop following the instructions in the figure (spread grease, bond etc.) Sony grease SGL-601 : 7-651-000-10 Tapping screw (B)(1.4 4) Tapping screw (B)(1.4 4) Joint (AVLS) Joint (VOL) Knob (Hold) Knob (Vol) Ring. O (Apply sony grease: SGL-601) Ring

9、(Dia. 2.5 Dia. 4.5). O (Apply sony grease: SGL-601) ? ? ? ? ? ? ? ? ? ? 4 SECTION 3 DISASSEMBLY Note :Follow the disassembly procedure in the numerical order given. SetMain AssemblyChassis Sub AssyMain Board and Mechanism DeckBelt Head, Magnetic (HP901) Note :Disassemble the unit in the order as sho

10、wn below. 3-1. MAIN ASSEMBLY 6 Remve the main assembly in the direction of arrow. (Be careful not to focibly pull the wire that connects the main board and the headphone board.) 7 Remove the headphone borad in the direction of arrow. 1 Stop ring (E 1.2) 5 Two screws (+B1.7 7) 3 Screw, tapping 2 Scre

11、w, tapping 4 Cassette sub assembly, holder CAUTION WHEN ASSEMBLING THE MAIN ASSEMBLY Assemble the main assembly in a way that each switch mates with the corresponding knob each other. DIR switch (S301) POWER switch (S303) DX/LOCAL switch (S304) Volume (RV301) ? ? ? ? ? ? ? ? ? ? 5 3-2. CHASSIS SUB A

12、SSY Main board 2 Knob (DX-Local) 1 Two claws 3 Chassis sub assy 3-3. MAIN BOARD AND MECHANISM DECK 3 Screw (M1.4 ) Toothed Lock 1 Remove the solder (fouf points) 5 Stopper (MD) 4 Main board 2 Remove the solder 6 Mechanism deck ? ? ? ? ? ? ? ? ? ? 6 3-4. BELT Reel/Capstan motorCapstan wheel assy(SP)

13、Capstan wheel assy(SP) Belt threading Belt Belt 3-5. HEAD, MAGNETIC (HP901) 1 Two screws (M1.4) 2 Head, magnetic (HP901) ? ? ? ? ? ? ? ? ? ? 7 SECTION 4 MECHANICAL ADJUSTMENT SECTION 5 ELECTRICAL ADJUSTMENT PRECAUTION 1.Clean the following parts with a denatured-alcohol-moistened swab: playback head

14、pinch roller rubber beltscapstan 2.Do not use a magnetized screwdriver for the adjustments. Torque Measurement Mode FWD FWD Back Tension FF, REW Torque Meter CQ-102C CQ-102C CQ-201B Meter Reading 20 to 42 gcm (0.27 to 0.58 ozinch) More than 2.0 gcm (More than 0.027 ozinch) More than 50 gcm (More tha

15、n 0.69 ozinch) TAPE SECTION Signal 3 kHz, 0 dB Used for Tape speed adjustment Tape WS-48A Test Tape Tape Speed Adjustment Procedure: Mode: Playback Adjustment Value: normal tape speed Adjust the tape speed adjustment RV601, so that the freqency counter reading becomes 3,000Hz. Specification Value: F

16、requency difference between the beginning and the end of the tape should be within 1.5 % (45 Hz). Adjustment Location: Test tape WS-48A (3 kHz, 0 dB) Set J301 (phones) 16 digital frequency counter + Digital frequency counter 2,970 to 3,030 Hz 0 dB = 0.775 V RV601 ? ? ? ? ? ? ? ? ? ? 8 Switch Locatio

17、n VOLUME: MAX MEGA BASS : OFF AVLS: NORMAL AM Tracking Adjustment BAND: AM Signal generator FM Tracking Adjustment BAND : FM Signal generator AM TRACKING ADJUSTMENT Adjust for maximum reading on level meter. L1620 kHz CT11,400 kHz TUNER SECTION Put the lead-wire antenna close to the set. 30 % amplit

18、ude modulation by 400 Hz signal. Output level : as low as possible AM RF signal generator 0.01 F FM RF signal generator FM IN point (TP22) 75 kHz(100 %) amplitude modulation by 1kHz signal. Output level: as low as possible 16 set level meter J301 (phones) Repeat the procedures in each adjustment sev

19、eral times for the maximum level meter indication. The frequency coverage and tracking adjustments should be finally done by the trimmer capacitors. AM FREQUENCY COVERAGE ADJUSTMENT Adjust for a 1.1V 0.1Vde reading on digital voltmeter L2530 kHz AM IF ADJUSTMENT Adjust for a maximum reading on level

20、 meter. T1450 kHz FM TRACKING ADJUSTMENT Adjust for maximum reading on level meter. L386.5 MHz CT2109.5 MHz FM FREQUENCY COVERAGE ADJUSTMENT Adjust for a 2.5V 0.1Vde reading on digital voltmeter L487.5 MHz Adjustment Location: Main board (See page 9) 0 dB = 1 V + digital voltmeter TP30(VT) (GND) MAI

21、N board AM Frequency Coverage Adjustment FM Frequency Coverage Adjustment + digital voltmeter TP30(VT) (GND) MAIN board ? ? ? ? ? ? ? ? ? ? 9 MAIN BOARD Component side Conductor side CT1 L1 AM Tracking Adjustment T1 AM IF Adjustment CT2L3 FM Tracking Adjustment L4 FM Frequency Coverage Adjustment L2

22、 AM Frequency Coverage Adjustment TP22 FM IN TP30 VT ? ? ? ? ? ? ? ? ? ? 10 SECTION 6 DIAGRAMS 6-1. IC BLOCK DIAGRAMS IC1TA2111F-(EL) IC301 LB8115W-NA-TLM 2423222120191817161514 111098765432112 13 AM MIX FM MIX AM OSC FM OSC AF BUFF AM DET FM IF AM IF LEVEL DET FM DET TUN LED ST LED AGC FM RF FM RF

23、INRF GNDMIX OUTAGCVCCGNDTUN LEDST LEDQUADAM LOW CUT AM IF IN FM IF IN FM MUTE ST/MO FM/AM AF VCO DECODE DIVIDE AM RF INFM RF OUTFM OSCAM OSCAFCLPF2LPF1L-OUTR-OUTRF VCCDET OUTMPX IN 1 2 36 35 34 33 32 31 30 29 28 27 26 25 131415 16 1718 1920 21 2223 24 48 47 46 45 44 43424140393837 COM RI VREF POWER

24、OUTC POWER OUT2 VCC POWER MUTE POWER IN1 POWER IN2 MIX OUT1 MIX OUT2 LP.2 R. P2 R.P1 DET OUT MVREF IN+ VSP LOW BOOST IN2 LOW BOOST IN1 LOW BOOST SW M-GND R.VREF PRE MUTE SW (FWD/REW) POWER OUT1 POWER GND MVCC DR WOUT MP-GND VOUT UOUT FC OUT OSC UB VB WB 3 4 5 6 7 8 9 10 11 12 PRE NF1 PRE OUT2 PRE NF

25、2 PRE FWD IN2 PRE REV IN2 PRE REV IN1 PRE FWD IN1 S/S PRE GND PRE OUT1 BIAS R.F REF SYS CONT DET VREF SPEED LOW BOOST PRE DRIVER OPERATION LOGIC OSC PLUSE DET REF VOLTAGE REF VOLTAGE FOR SPEED CONTROL CURRENT DET OPERATION DET FWD/ REV FREQ CARC. + ? ? ? ? ? ? ? ? ? ? WM-FS420/FS420RS 6-2. BLOCK DIA

26、GRAM KEY MATRIX LP1 X OUT 1 ND701 LIQUID CRYTAL DISPLAY STEREO DX NORMAL LOCAL MONO METAL VCC S304 B.P.F FM RF L3 D2CT2 FM RF OUT23 VCC26 VCC121 TUNER +B Q1 LOCAL /DX US,CND,MX MODEL FL1 FM RF IN1 FM OSC L4 D1 FM OSC21 AM OSC20 AM OSC L2 AM ANT L1 CT1 AM RF IN24 4MIX OUT CF1 10.7MHz CF2 450kHz T1 FM

27、 IF IN8 AM IF IN7 FM/AM RF,IF AMP DET,MPX IC1 MPX IN1718DET OUT14L OUT 13R OUT 12 QUAD X1 10.7MHz 10TUN LED 15 LP2 16 Q6 Q5 MONO/ST Q3 BAND AEP,E MODEL REV L R FWD L R HEAD PLAYBACK V REF R-L10 R-R12 F-L9 F-R11 V REF13 5PRE OUT(L) 7PRE OUT(R) MIX IN(L)30 H.PIN(L)28 PRE NF(L)6 MIX IN(R)29 H.PIN(R)27

28、PRE NF(R)8 Q201 Q101 24MIX OUT(L) IC301 PRE POWER AMP Q102 P IN(L)22 25MIX OUT(R) Q202 P IN(R)23 V REF AVLS NORMLIMIT S302 VCC IN+35 M VREF34 TAPE SPEED RV601 TH601 VOLUME RV301 i J301 16P OUT(L) 20P OUT(R) 18P COM 39U OUT 40V OUT 41W OUT M601 REEL/CAPSTAN MOTOR : FM Signal Path : PB Q2 BUFFER FM IN

29、56 11 BAND 29 SD AM IN57 A OUT61 A IN60 EO59 IC701 DTS 13 MEGA BASS 20 BEEP 32 (TAPE POWER) DRY BATTRY SIZE AA (IEC DESIGNATION R6) 2PCS 3V S303 POWER MUTE Q301 POWER SWITCH Q503 RIPPLE FILTER Q501,502 TUNER +B POWER SWITCH Q92 TUNER +B SWITCH Q91 VCC Q302 DIR TUNER +B PRE MUTE Q303 D301 (DIR) S301

30、POWER MUTE Q304 L.B SV 3S/S 21 POWER MUTE 55VDD +1.5V REG.23 IC702 1 D701 22REF VOLTAGE 27MUTE OUT 25RADIO ON 17TAPE IN X IN 64 X701 75kHz 10863 PA0PA3PB0PB2 48 45 COM1 COM4 44 30 S1S15 S702-711 16 TUNER +B D3 TUNER +BTUNER +B HP901 L3, CT2 FM TRACKING L4 FM FREQ. COVERAGE L2 AM FREQ. COVERAGE L1, C

31、T1 AM TRACKING 11 12 Abbreviation CND : Canadian model MX: Mexican model ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? WM-FS420/FS420RS 6-3. SCHEMATIC DIAGRAM 1.7 1.7 0 0.6 0 0.1 0.60.6 2.6 (2.1) (2.8) (2.8) (2.9) *3: C40 68P: FS420RS 100P: FS420 *3 *2: R107, R207 220

32、: FS420RS 150: FS420 *2 *2 2.1Vp-p 13.3sec 500mV/div 5sec/div +1.5V REG. 13 14 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. C

33、 : panel designation. U : B+ Line. H : adjustment for repair. Power voltage is dc 3 V and fed with regulated dc power supply from battery terminal. Voltages are dc with respect to ground under no-signal (detuned) conditions. no mark : PB () : FM : AM Voltages are taken with a VOM (Input impedance 10

34、 M). Voltage variations may be noted due to normal produc- tion tolerances. Signal path. F: FM f: AM E: PB Abbreviation CND: Canadian model MX: Mexican model Refer to page 10 for IC Block Diagrams. Refer to page 17 for IC Pin Function. ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

35、? ? ? ? ? ? ? WM-FS420/FS420RS 6-4. PRINTED WIRING BOARD 15 16 Note on Printed Wiring Board: X : parts extracted from the component side. Y : parts extracted from the conductor side. b : Pattern from the side which enables seeing. Abbreviation CND: Canadian model MX: Mexican model Ref. No.Location D

36、1F-1 D2F-2 D3F-2 D301E-7 D701B-1 D705D-9 D706D-9 IC1F-3 IC301B-3 IC701D-8 IC702D-3 Q1G-3 Q2E-2 Q3F-8 Q5F-8 Q6F-7 Q91E-9 Q92E-9 Q101C-3 Q102A-7 Q201C-3 Q202A-7 Q301B-7 Q302E-7 Q303E-7 Q304C-7 Q501B-9 Q502B-9 Q503C-8 Semiconductor Location FWD S301 S303 TP30 TP22 12 A B C D E F G 3456789 16 ? ? ? ? ?

37、? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 6-5. IC PIN FUNCTION DESCRIPTION MAIN BOARDIC701 (DTC) LC72348W-9906 17 18 Pin No. 1 2 3 6 7 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 44 45 48 49 52 53 54 55 56 57 58 59 60 61 62 63 64 Description Crystal outpu

38、t GND Key input Key output Band output Not used MEGA BASS ON/OFF control Not used Destination selection input Destination selection input TAPE input IBackup input during halt Backup output Beep output Backup input POWER CHECK input (A/D) Backlight key input RADIO ON/OFF CONTROL HOLDKey input Mute ou

39、tput TAPE/radio selector otput SD input Segment output Common output LCD power supply Reset input DC output to tuning voltage gen. Circuit Positive polarity Input to FM system Input to AM system GND Error output LPF input LPF output GND GND Input to crystal Pin Name XOUT TEST2 PA3 0 PB3 0 BAND N.C M

40、EGA BASS N.C INIT2 INIT1 TAPE IN BATT CHECK LED CONTROL BEEP BACK UP REF VOLTAGE N.C Vss RADIO ON HOLD MUTE OUT N.C SD S15 1 COM4 1 DBR4 1 BRES DDC Vdd FMIN AMIN Vss EO AIN AOUT AGND TEST1 XIN I/O O I I O O O I I I I O O I I I O I O O I O O I O I I O I O I I SECTION 7 EXPLODED VIEWS NOTE: -XX, -X me

41、an standardized parts, so they may have some differences from the original one. Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. The mechanical parts with no reference number in the exploded views are not

42、 supplied. Hardware (# mark) list and accessories and packing materials are given in the last of this parts list. 7-1. CABINET ASSY SECTION #1 #2 ND701 6 4 10 18 15 22 98 2 1 3 17 16 14 12 13 21 19 23 20 24 21 4 11 7 25 26 5 not supplied Ref. No.Part No.DescriptionRemarksRef. No.Part No.DescriptionR

43、emarks 13-042-884-01BUCKLE 23-042-890-01SHAFT(BUCKLE) 33-042-885-01PLATE, LOCK 43-318-203-62SCREW(B1.7X4), TAPPING 53-009-870-01ROLLER (BUCKLE) 63-025-316-01SHAFT(ROLLER) 73-012-927-01RING,O 83-042-881-01KNOB(VOL) 93-042-880-01KNOB(HOLD) 103-042-880-11KNOB(HOLD) 113-326-560-02RING(DIA. 2.5XDIA. 4.5), O 123-934-023-01JOINT (VOL) 133-318-201-51SCREW (B) (1.4X4), TAPPING * 141-675-511-11HEADPHONE BOARD 153-032-