索尼SONY WM-FS421电路图.pdf

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1、WM-FS421 E ModelSERVICE MANUAL RADIO CASSETTE PLAYER Sony Corporation Personal Audio Company Shinagawa Tec Service Manual Production Group 9-873-121-11 2001D1600-1 2001.4 Ver 1.0 2001. 04 SPECIFICATIONS Model Name Using Similar MechanismNEW Tape Transport Mechanism TypeMF-WMFS421-114 Frequency range

2、 FM: 87.5 - 108 MHz AM: 530 - 1 710 kHz (North, Central and South America) 531 - 1 602 kHz (Other countries) Power requirements 3 V DC batteries R6 (size AA) 2 Dimensions (w/h/d) Approx. 107.3 123.3 51.5 mm (4 14 4 78 2 18 inches), excluding projecting parts and controls Mass Approx. 282 g (10.0 oz)

3、 (main unit only) Supplied accessories Stereo headphones or earphones (1) Belt clip (1) Design and specifications are subject to change without notice. Battery life (approximate hours)(JEITA*) TapeRadio playbackreception Sony alkaline LR6 (SG)*3240 Sony R6P (SR)914 * Measured value by the standard o

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

5、 and battery type. ? ? ? ? ? ? ? ? ? ? 2 TABLE OF CONTENTS WM-FS421 1. GENERAL 2 2. SERVICE NOTE3 3. DISASSEMBLY 3-1. Main Assy 4 3-2. Chassis Sub Assy5 3-3. MAIN Board and Mechanism Deck 5 3-4. Belt 6 3-5. Head, Magnetic (HP701)6 4. MECHANICAL ADJUSTMENT 7 5. ELECTRICAL ADJUSTMENT7 6. DIAGRAMS 6-1.

6、 IC Block Diagrams 10 6-2. Block Diagram 11 6-3. Printed Wiring Board 12 6-4. Schematic Diagram 13 6-5. IC Pin Function Description 14 7. MEXPLODED VIEWS 7-1. Cabinet Assy Section 15 7-2. MAIN Board Section 16 7-3. Mechanism Deck Section-1 (MF-WMFS421-114) 17 7-4. Mechanism Deck Section-2 (MF-WMFS42

7、1-114) 18 8. ELECTRICAL PPARTS LIST19 SECTION 1 GENERAL 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

8、 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 soldering or unsoldering. HOLD OFF N M FM, AM PRESET +/ m x Display Afficheur VOLUME TUNING +, i Y (FS422ST/FS421 only) Y (FS422ST/FS421 unique

9、ment) MENU SET ENTER Air outlet Evacuation dair Rubber cap Capuchon en caoutchouc This section is extracted from instruction manual. ? ? ? ? ? ? ? ? ? ? 3 WM-FS421 SECTION 2 SERVICE NOTE WATER PROOF SECTION Note: In case the parts in the figure are removed for repair, treat them to protect from wate

10、r 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) O Ring (Apply sony grease: SGL-601) O Ring (Dia. 2.5 Dia. 4.5) (Apply sony grease: SGL-601) ?

11、 ? ? ? ? ? ? ? ? ? 4 WM-FS421 SECTION 3 DISASSEMBLY Note :Follow the disassembly procedure in the numerical order given. Note :Disassemble the unit in the order as shown below. 3-1. MAIN ASSY CAUTION WHEN ASSEMBLING THE MAIN Assy Assemble the main Assy in a way that each switch mates with the corres

12、ponding knob each other. SetMain AssyChassis Sub AssyMAIN Board and Mechanism DeckBelt Head, Magnetic (HP701) 6 Remve the main assy 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

13、 of arrow. 1 Stop ring (E 1.2) 5 Two screws (+B1.7 7) 3 Screw, tapping 2 Screw, tapping 4 Cassette sub assy, holder HOLD (S701) w VOLUME (RV301) ? ? ? ? ? ? ? ? ? ? 5 WM-FS421 3-2. CHASSIS SUB ASSY 3-3. MAIN BOARD AND MECHANISM DECK MAIN board 1 Two claws Chassis sub assy 2 3 Screw (M1.4 ) Toothed L

14、ock 1 Remove the solder (four points) 5 Stopper (L2) 4 MAIN board 2 Remove the solder 6 Mechanism deck ? ? ? ? ? ? ? ? ? ? 6 WM-FS421 3-4. BELT 3-5. HEAD, MAGNETIC (HP701) Reel/Capstan motorCapstan wheel assy(SP) Capstan wheel assy(SP) Belt threading Belt Belt 1 Two screws (M1.4) 2 Head, magnetic (H

15、P701) ? ? ? ? ? ? ? ? ? ? 7 WM-FS421 SECTION 4 MECHANICAL ADJUSTMENT SECTION 5 ELECTRICAL ADJUSTMENT PRECAUTION 1.Clean the following parts with a denatured-alcohol-moistened swab: playback headpinch roller rubber beltscapstan 2.Do not use a magnetized screwdriver for the adjustments. Torque Measure

16、ment Mode FWD FWD Back Tension FF, REW Torque Meter CQ-102C CQ-102C CQ-201B Meter Reading 2.0 to 4.1 Nm (20 to 42 gcm) (0.27 to 0.58 ozinch) More tham 0.20 Nm (More than 2.0 gcm) (More than 0.027 ozinch) More tham 4.9 Nm (More than 50 gcm) (More than 0.69 ozinch) TAPE SECTION Signal 3 kHz, 0 dB Used

17、 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: Frequency difference between the beginning and the e

18、nd of the tape should be within 1.5 % (45 Hz). Adjustment Location: Digital frequency counter 2,970 to 3,030 Hz 0 dB = 0.775 V Test tape WS-48A (3 kHz, 0 dB) Set J301 ( i ) 16 digital frequency counter + RV601 ? ? ? ? ? ? ? ? ? ? 8 WM-FS421 Switch Location VOLUME: MAX MEGA BASS : OFF AVLS: NORMAL BA

19、ND: AM BAND : FM TUNER SECTION Put the lead-wire antenna close to the set. 30 % amplitude 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 (TP2) 75 kHz(100 %) amplitude modulation by 1kHz signal. Output level: as low as p

20、ossible 16 set level meter J301 (i) Adjustment Location: Main board (See page 9) 0 dB = 1 V FM TRACKING ADJUSTMENT Adjust for maximum reading on level meter. L487.5 MHz AM FREQUENCY COVERAGE ADJUSTMENT Adjust for a 1.1V 0.1Vde reading on digital voltmeter L7530 kHz AM TRACKING ADJUSTMENT Adjust for

21、maximum reading on level meter. L3620 kHz CT11,400 kHz Repeat the procedures in each adjustment several times for the maximum level meter indication. The frequency coverage and tracking adjustments should be finally done by the trimmer capacitors. AM IF ADJUSTMENT Adjust for a maximum reading on lev

22、el meter RV21,000 kHz FM VCO Adjustment Procedure: 1.Connect the resistor 10k between TP1 and TP (VCO). 2.Connect the frequency counter to TP1 (IC1 pin). 3.Set FUNCTION switch to FM. 4.Tune the set in 96MHz. 5.Adjust RV1 so that the reading on the frequency counter becomes 76 kHz. Specifications: 75

23、 kHz-77 kHz TP2 TP1 0.01F FM RF SSG MAIN BOARD (SIDE B) Carrier frequency: 96MHz Deviation: none Output level: 562 V(55dB) TP2 (FM IN) TP2 TP1 + + 1F MAIN BOARD (SIDE B) frequency counter 10k TP1 TP (VCO) ? ? ? ? ? ? ? ? ? ? 9 WM-FS421 MAIN BOARD Component side Conductor side CT1 AM Tracking Adjustm

24、ent L4 FM Tracking Adjustment L7 AM Frequency Coverage Adjustment L3 AM Tracking Adjustment RV1: FM VCO Adjustment RV2: AM IF Adjustment TP2 FM IN TP1 TP(VCO) ? ? ? ? ? ? ? ? ? ? 10 WM-FS421 SECTION 6 DIAGRAMS 6-1. IC BLOCK DIAGRAMS IC1 CXA1960Q IC301 LB8115W-NA-TLM + 12 13 14 19 15 TVIN MREF GRND F

25、MIB IFCT NC FMIN FMRO OLAG ARFI REGV TVRO FTLO BAND TUNE PLLO FALC COMP 37 38 39 40 AAGC DETO PLT2 MPXI MPRM V12M MUTE PLT1 PLL1 PLL2 MPX DECODER AM BPF PSN 1/X FM/TV LPF PDVCO1/21/2 STID 14V PLAP TUNE 38kHz STEREO AUDIO R STEREO AUDIO L 19kHz 1.65V 1.25V 36 8910 VCO STID MCNT GRND VCC 142356 MPRG L

26、OUT ROUT DDCN PLLI 7 + + 35 34 FM DET 150kHz FM LMT OL DET TV RF AMP FM RF AMP AM RF AMP 45kHz 31 32 33 MUTE AGC AMP AM AGC 1.25VAM/FM: 1/2 TV: 1/8 1.25V 18 17 16 FMBF AMLO AM OSC FM/TV OSC 20 302927282324252622 21 11 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

27、 44 43424140393837 COM RI VREF POWER 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

28、 8 9 10 11 12 PRE NF1 PRE OUT2 PRE NF2 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. + ? ? ? ? ? ? ?

29、? ? ? WM-FS421 1111 6-2. BLOCK DIAGRAM : FM Signal Path : PB KEY MATRIX PLT2 X OUT 1 LCD701 LIQUID CRYTAL DISPLAY B.P.F FM RF L4 D2 FMRO22 MREF27 REGV VCC 19 IFCT29 10 VCO1 MPRG2 TUNER +B FMIN25 FM OSC L6 D1 FMLO18 AMLO16 AM OSC L7 L3 CT1 ARFI26 FM/AM RF,IF AMP DET,MPX IC1 3LOUT 4ROUT COMP 37 PLT1 3

30、8 BAND 12 REV FWD (PLAYBACK) V REF REV (L)10 REV (R)12 FWD (L)9 FWD (R)11 V REF13 5PRE OUT(L) 7PRE OUT(R) MIXIN(L)30 H.PIN(L)28 PRENF(L)6 MIXIN(R)29 H.PIN(R)27 PRENF(R)8 Q301(2/2) Q301(1/2) 24MIXOUT(L) IC301 PRE POWER AMP Q200(1/2) PWIN(L)22 25MIXOUT(R) Q200(2/2) PWIN(R)23 V REF HOLD S701 S302 IN+35

31、 M VREF34 TAPE SPEED FM VCO RV601 TH601 w VOLUME RV301 i J301 16PWOUT(L) 20PWOUT(R) 18PWOUT(C) 39UOUT 40VOUT 41WOUT M601 (CAPSTAN/REEL) B.P.FTVIN24 Q3 BUFFER FM IN56 14 BAND 13 1612 COMP LOCAL/DX NOR/METAL AM IN57 LPF OUT61 TU VCC54 LPF IN60 E.O59 TUNE 11 15 SD IC702 DTS 26 MEGA BASS 20 BEEP 32 10 A

32、LVS (TAPE POWER) DRY BATTRY SIZE AA (IEC DESIGNATION R6) 2PCS 3V S301 RIPPLE FILTER Q501,502 REG D403,404 POWER SWITCH Q701 VCC TUNER +B LB SW 11 MOTOR CTL 3 S/S 29 PRE CTL 15 SYSTEM 21 PW MUTE 55VDD 21 BATT CHECK +1.5V REG.12 IC701 3 D703 22BATT REF 27 MUTE 25RADIO ON 19AMP ON 28TAPE 17N/R SW X IN

33、64 HOLD 23 X701 75kHz 9763 PA0PA3PB1PB3 48 45 COM1 COM4 44 30 S1S15 S702-713 D4 HP701 L4 FM TRACKING L7 AM FREQ. COVERAGE L3, CT1 AM TRACKING RV2 RV1 AF IF L R L R AM FERRIRE-ROD ANTENNA ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? WM-FS421 1212 6-3. PRINTED WIRING B

34、OARD 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. Ref. No.Location D1A-5 D2B-2 D4B-2 D403D-7 D404D-7 D701F-7 IC1B-2 IC301E-3 IC701D-3 IC702D-2 Q3C-3 Q200A-5 Q301E-3 Q501F-2 Q502

35、E-1 Q701E-1 Semiconductor Location w Y HP701 0FF - ON L3 AM FERRIRE.ROD ANTENNA TP2 TP1 TP(VCO) 12 A B C D E F G 3456789 IC702 IC301 IC701 IC1 Caution: Pattern face side:Parts on the pattern face side seen from (Side A)the parts face are indicated. Parts face side:Parts on the parts face side seen f

36、rom (Side B)the pattern face are indicated. ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? WM-FS421 1313 6-4. SCHEMATIC DIAGRAM 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

37、 tantalums. All resistors are in and 1/4 W or less unless other- wise specified. C : panel designation. A : 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) condi

38、tions. no mark : PB () : FM Voltages are taken with a VOM (Input impedance 10 M). Voltage variations may be noted due to normal produc- tion tolerances. Signal path. F: FM f: AM E: PB Refer to page 10 for IC Block Diagrams. Refer to page 17 for IC Pin Function. IC B/D IC B/D AM IF FM VCO ? ? ? ? ? ?

39、 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 14 WM-FS421 6-5. IC PIN FUNCTION DESCRIPTION MAIN BOARDIC702 (DTC) LC72348W-9906 Pin No. 1 2 3-6 7-9 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 Crysta

40、l output GND Key input Key output AVLS output MOTOR control NOMAL/METAL(DX/LOCAL) select output Not used Band output SD input COMP input TAPE FWD/REV input switch Backup input AMP-ON output Beep output Backup input during halt POWER CHECK input HOLD Key input GND RADIO ON/OFF control MEGA BASS ON/OF

41、F control Mute output TAPE input PREAMP control segment output Common output LCD power supply RESET input IF input 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 PA0-PA3 PB1-PB3 AVLS MOTOR CTL LOCAL/DX/NOR/ME

42、TAL E/CA BAND SD COMP N/R SW BACK UP AMP-ON BEEP BATT CHECK BATT REF HOLD VSS RADIO ON MEGA BASS MUTE TAPE PRE CTL S1-S15 COM1-COM4 DBR1-DBR4 RESET TU VCC VDD FM IN AM IN VSS E.O LPF IN LPF OUT LPF GND TEST1 XIN I/O O I O O O O I O I I I I O O I I I O O O I O O O I I I I O I O I ? ? ? ? ? ? ? ? ? ?

43、15 WM-FS421 SECTION 7 EXPLODED VIEWS NOTE: -XX, -X mean 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 wit