WM-FS421 E Model SERVICE 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 Mechanism NEW Tape Transport Mechanism Type MF-WMFS421-114 • Frequency range 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 1⁄4 × 4 7⁄8 × 2 1⁄8 inches), excluding projecting parts and controls • Mass Approx. 282 g (10.0 oz) (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*) Tape Radio playback reception Sony alkaline LR6 (SG)** 32 40 Sony R6P (SR) 9 14 * Measured value by the standard of 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 and battery type. www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 2 TABLE OF CONTENTS WM-FS421 1. GENERAL ·········································································· 2 2. SERVICE NOTE ······························································· 3 3. DISASSEMBLY 3-1. Main Assy ······································································ 4 3-2. Chassis Sub Assy ··························································· 5 3-3. MAIN Board and Mechanism Deck······························ 5 3-4. Belt ················································································ 6 3-5. Head, Magnetic (HP701)··············································· 6 4. MECHANICAL ADJUSTMENT ·································· 7 5. ELECTRICAL ADJUSTMENT ···································· 7 6. DIAGRAMS 6-1. 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-WMFS421-114) ·················································· 18 8. ELECTRICAL PPARTS LIST ···································· 19 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 270˚C during 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 uniquement) MENU SET ENTER Air outlet Evacuation d’air Rubber cap Capuchon en caoutchouc This section is extracted from instruction manual. www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 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 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) O Ring (Apply sony grease: SGL-601) O Ring (Dia. 2.5 × Dia. 4.5) (Apply sony grease: SGL-601) www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 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 corresponding knob each other. Set Main Assy Chassis Sub Assy MAIN Board and Mechanism Deck Belt 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 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) www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 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 Lock 1 Remove the solder (four points) 5 Stopper (L2) 4 MAIN board 2 Remove the solder 6 Mechanism deck www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 6 WM-FS421 3-4. BELT 3-5. HEAD, MAGNETIC (HP701) Reel/Capstan motor Capstan wheel assy(SP) Capstan wheel assy(SP) Belt threading Belt Belt 1 Two screws (M1.4) 2 Head, magnetic (HP701) www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 7 WM-FS421 SECTION 4 MECHANICAL ADJUSTMENT SECTION 5 ELECTRICAL ADJUSTMENT PRECAUTION 1. Clean the following parts with a denatured-alcohol-moistened swab: playback head pinch roller rubber belts capstan 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 2.0 to 4.1 N•m (20 to 42 g•cm) (0.27 to 0.58 oz•inch) More tham 0.20 N•m (More than 2.0 g•cm) (More than 0.027 oz•inch) More tham 4.9 N•m (More than 50 g•cm) (More than 0.69 oz•inch) 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: Frequency difference between the beginning and the end 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 Ω digital frequency counter + – RV601 www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 8 WM-FS421 • Switch Location VOLUME : MAX MEGA BASS : OFF AVLS : NORMAL BAND: 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 µF FM RF signal generator FM IN point (TP2) 75 kHz(100 %) amplitude modulation by 1kHz signal. Output level: as low as possible 16 Ω set level meter J301 (i) Adjustment Location: Main board (See page 9) 0 dB = 1 µV FM TRACKING ADJUSTMENT Adjust for maximum reading on level meter. L4 87.5 MHz AM FREQUENCY COVERAGE ADJUSTMENT Adjust for a 1.1V ± 0.1Vde reading on digital voltmeter L7 530 kHz AM TRACKING ADJUSTMENT Adjust for maximum reading on level meter. L3 620 kHz CT1 1,400 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 level meter RV2 1,000 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 kHz-77 kHz TP2 TP1 0.01F FM RF SSG [MAIN BOARD] (SIDE B) Carrier frequency : 96MHz Deviation : none Output level : 562 µV(55dB) TP2 (FM IN) TP2 TP1 + + 1µF [MAIN BOARD] (SIDE B) frequency counter 10kΩ TP1 TP (VCO) www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 9 WM-FS421 [MAIN BOARD] — Component side — — Conductor side — CT1 AM Tracking Adjustment 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) www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 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 FMIB 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 PD VCO 1/2 1/2 STID 14V PLAP TUNE 38kHz STEREO AUDIO R STEREO AUDIO L 19kHz 1.65V 1.25V 36 8 9 10 VCO STID MCNT GRND VCC 1 4 2 3 5 6 MPRG LOUT 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 1.25V AM/FM: 1/2 TV: 1/8 1.25V 18 17 16 FMBF AMLO AM OSC FM/TV OSC 20 30 29 27 28 23 24 25 26 22 21 11 1 2 36 35 34 33 32 31 30 29 28 27 26 25 13 14 15 16 17 18 19 20 21 22 23 24 48 47 46 45 44 43 42 41 40 39 38 37 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 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. + – www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com WM-FS421 11 11 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 FMRO 22 MREF 27 REGV VCC 19 IFCT 29 10 VCO 1 MPRG 2 TUNER +B FMIN 25 FM OSC L6 D1 FMLO 18 AMLO 16 AM OSC L7 L3 CT1 ARFI 26 FM/AM RF,IF AMP DET,MPX IC1 3 LOUT 4 ROUT COMP 37 PLT1 38 BAND 12 REV FWD (PLAYBACK) V REF REV (L) 10 REV (R) 12 FWD (L) 9 FWD (R) 11 V REF 13 5 PRE OUT(L) 7 PRE 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) 24 MIXOUT(L) IC301 PRE POWER AMP Q200(1/2) PWIN(L) 22 25 MIXOUT(R) Q200(2/2) PWIN(R) 23 V REF HOLD • > S701 S302 IN+ 35 M VREF 34 TAPE SPEED FM VCO RV601 TH601 w VOLUME RV301 i J301 16 PWOUT(L) 20 PWOUT(R) 18 PWOUT(C) 39 UOUT 40 VOUT 41 WOUT M601 (CAPSTAN/REEL) B.P.F TVIN 24 Q3 BUFFER FM IN 56 14 BAND 13 16 12 COMP LOCAL/DX NOR/METAL AM IN 57 LPF OUT 61 TU VCC 54 LPF IN 60 E.O 59 TUNE 11 15 SD IC702 DTS 26 MEGA BASS 20 BEEP 32 10 ALVS (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 55 VDD 21 BATT CHECK +1.5V REG. 1 2 IC701 3 D703 22 BATT REF 27 MUTE 25 RADIO ON 19 AMP ON 28 TAPE 17 N/R SW X IN 64 HOLD 23 X701 75kHz 9 7 6 3 PA0 PA3 PB1 PB3 48 45 COM1 COM4 44 30 S1 S15 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 w w w . x i a o y u 1 6 3 . c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com WM-FS421 12 12 6-3. PRINTED WIRING BOARD 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 D1 A-5 D2 B-2 D4 B-2 D403 D-7 D404 D-7 D701 F-7 IC1 B-2 IC301 E-3 IC701 D-3 IC702 D-2 Q3 C-3 Q200 A-5 Q301 E-3 Q501 F-2 Q502 E-1 Q701 E-1 • Semiconductor Location w Y > HP701 0FF - ON L3 AM FERRIRE.ROD ANTENNA TP2 TP1 TP(VCO) 1 2 A B C D E F G 3 4 5 6 7 8 9 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 from (Side B) the pattern face are indicated. w w w . x i a o y u 1 6 3 . c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com WM-FS421 13 13 6-4. SCHEMATIC DIAGRAM Note on Schematic Diagram: • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums. • All resistors are in Ω 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) conditions. no mark : PB ( ) : FM • Voltages are taken with a VOM (Input impedance 10 MΩ). 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 w w w . x i a o y u 1 6 3 . c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 14 WM-FS421 6-5. IC PIN FUNCTION DESCRIPTION • MAIN BOARD IC702 (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 Crystal 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/OFF 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/METAL 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 www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 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 with no reference number in the exploded views are not supplied. • Hardware (# mark) list and accessories and packing materials are given in the last of this parts list. 7-1. CABINET ASSY SECTION 19 ND701 22 2 21 4 5 23 20 8 7 9 11 15 13 13 12 10 17 24 14 21 25 26 @ not supplied @ @ @ not supplied @ @ @ 4 1 3 6 18 16 MAIN BOARD SECTION Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks 1 3-224-944-01 BUCKLE 2 3-224-946-01 SHAFT (BUCKLE) 3 3-224-971-01 PLATE, LOCK 4 3-318-203-62 SCREW (B1.7X4), TAPPING 5 3-224-941-01 PACKING (MD.RVS) 6 3-224-945-01 SHAFT (ROLLER) 7 3-012-927-01 RING, O 8 3-224-937-01 KNOB (VOL) 9 3-224-938-01 KNOB (HOLD) 10 X-3380-327-1 CABINET (REAR) SUB ASSY 11 3-326-560-11 RING (DIA. 2.5XDIA. 4.5), O 12 3-018-075-01 SPACER 13 3-318-201-51 SCREW (B) (1.4X4), TAPPING * 14 1-681-951-01 HEADPHONE BOARD 15 3-227-296-01 JOINT (HOLD) 16 7-624-101-04 STOP RING 1.2 (E TYPE) 17 3-922-447-01 PACKING, DC JACK 18 3-386-371-01 PACKING, HP JACK 19 7-626-311-81 SPRING-PIN 1.6X18 20 X-3369-989-1 ARM ASSY 21 3-386-373-01 SCREW, TAPPING 22 X-3380-329-1 CASSETTE SUB ASSY, LID 23 3-318-203-32 SCREW (B1.7), TAPPING 24 3-228-185-01 STRAP, HAND 25 3-224-947-01 HOLDER (LCD) 26 3-040-176-01 RUBBER, CONDUCTIVE ND701 1-804-256-11 LIQUID CRYSTAL DISPLAY www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 16 WM-FS421 7-2. MAIN BOARD SECTION L3 63 62 60 55 54 59 52 56 51 53 57 58 MF-WMFS421-114 64 67 65 66 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks 51 3-227-295-01 LID, BATTERY CASE 52 3-231-465-01 SPRING, TORSION 53 3-318-203-32 SCREW (B1.7), TAPPING 54 3-227-301-01 SPRING (CASSETTE) 55 3-224-933-01 CHASSIS 56 3-227-300-01 BUTTON (REW) 57 3-227-297-01 BUTTON (PLAY) 58 3-227-299-01 BUTTON (FF) 59 3-227-298-01 BUTTON (STOP) 60 3-224-939-01 STOPPER (L2) 62 3-015-285-01 SCREW (M1.4),TOOTHED LOCK (WH) * 63 A-3021-390-A MAIN BOARD, COMPLETE 64 3-221-310-01 LEVER (VOL) (B) 65 3-921-878-01 TERMINAL BOARD, BATTERY 66 3-224-948-01 TERMINAL (-), BATTERY 67 3-318-201-51 SCREW (B) (1.4X4), TAPPING L3 1-754-166-11 ANTENNA, FERRITE-ROD www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 17 WM-FS421 7-3. MECHANISM DECK SECTION-1 (MF-WMFS421-114) 206 205 207 203 202 204 201 M601 HP701 not supplied @ @ @ not supplied @ @ @ Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks 201 3-938-657-01 BELT 202 3-920-997-01 SPRING (PINCH R) 203 X-3369-748-1 PINCH LEVER (R) ASSY 204 3-704-197-01 SCREW (M1.4), SPECIAL HEAD 205 3-024-223-11 GEAR (REEL-2) 206 3-704-197-71 SCREW (M1.4) 207 X-3369-749-1 PINCH LEVER (N) ASSY HP701 1-500-648-11 HEAD, MAGNETIC (PLAYBACK) M601 1-763-683-11 MOTOR, DC(REEL/CAPSTAN)(WITH PULLEY) www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com 18 WM-FS421 7-4. MECHANISM DECK SECTION-2 (MF-WMFS421-114) 257 258 262 263 264 265 267 269 251 255 254 256 not supplied Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks 251 3-921-797-01 WASHER 254 3-021-786-01 LEVER (FS), D SELECTION 255 3-921-052-11 LEVER (A), DETECTION 256 3-920-994-11 SPRING (D SELECTION) 257 X-3376-169-1 CLUTCH ASSY 258 3-929-419-01 LEVER (BR), DETECTION 262 3-728-091-01 WASHER, STOPPER 263 3-923-530-11 SLEEVE (M) 264 3-921-335-01 WASHER, LEVER 265 3-920-990-01 SPRING (UD), COMPRESSION 267 X-3372-619-1 WHEEL ASSY (NP), CAPSTAN 269 3-933-324-01 SPRING (FR LEVER) www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks 19 SECTION 8 ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the parts list may be different from the parts specified in the diagrams or the components used on the set. • -XX, -X mean standardized parts, so they may have some difference 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. • CAPACITORS: uF: µF • RESISTORS All resistors are in ohms. METAL: metal-film resistor METAL OXIDE: Metal Oxide-film resistor F: nonflammable • COILS uH: µH The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. • SEMICONDUCTORS In each case, u: µ, for example: uA...: µA... , uPA... , µPA... , uPB... , µPB... , uPC... , µPC... , uPD..., µPD... When indicating parts by reference number, please include the board name. WM-FS421 * A-3021-390-A MAIN BOARD, COMPLETE ********************* 3-221-309-01 LEVER (VOL) (A) 4-223-413-01 SCREW (M1.4X3) < CAPACITOR > C2 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V C3 1-162-927-11 CERAMIC CHIP 100PF 5% 50V C4 1-107-826-11 CERAMIC CHIP 0.1uF 10.00% 16V C5 1-107-826-11 CERAMIC CHIP 0.1uF 10.00% 16V C6 1-115-156-11 CERAMIC CHIP 1uF 10V C7 1-164-315-11 CERAMIC CHIP 470PF 5.00% 50V C8 1-113-619-11 CERAMIC CHIP 0.47uF 10V C9 1-126-514-11 ELECT 22uF 20.00% 6.3V C10 1-162-910-11 CERAMIC CHIP 5PF 0.25PF 50V C11 1-115-156-11 CERAMIC CHIP 1uF 10V C12 1-107-686-11 TANTALUM CHIP 4.7uF 20% 4V C13 1-115-156-11 CERAMIC CHIP 1uF 10V C14 1-115-156-11 CERAMIC CHIP 1uF 10V C15 1-162-912-11 CERAMIC CHIP 7PF 0.5PF 50V C16 1-126-794-11 ELECT 4.7uF 20.00% 25V C17 1-126-791-11 ELECT 10uF 20.00% 16V C18 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V C19 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V C20 1-115-156-11 CERAMIC CHIP 1uF 10V C21 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V C22 1-162-913-11 CERAMIC CHIP 8PF 0.50PF 50V C23 1-104-847-11 TANTAL. CHIP 22uF 20.00% 4V C24 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V C25 1-162-907-11 CERAMIC CHIP 2PF 0.25PF 50V C26 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V C28 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V C29 1-162-915-11 CERAMIC CHIP 10PF 0.5PF 50V C30 1-126-791-11 ELECT 10uF 20.00% 16V C31 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V C32 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V C33 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V C34 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V C35 1-162-927-11 CERAMIC CHIP 100PF 5% 50V C39 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V C40 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V C45 1-115-416-11 CERAMIC CHIP 0.001uF 5.00% 25V C101 1-162-962-11 CERAMIC CHIP 470PF 10% 50V C102 1-162-962-11 CERAMIC CHIP 470PF 10% 50V C103 1-162-968-11 CERAMIC CHIP 0.0047uF 10% 50V C104 1-126-153-11 ELECT 22uF 20% 6.3V C105 1-115-156-11 CERAMIC CHIP 1uF 10V C106 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V C107 1-115-156-11 CERAMIC CHIP 1uF 10V C108 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V C201 1-162-962-11 CERAMIC CHIP 470PF 10% 50V C202 1-162-962-11 CERAMIC CHIP 470PF 10% 50V C203 1-162-968-11 CERAMIC CHIP 0.0047uF 10% 50V C204 1-126-153-11 ELECT 22uF 20% 6.3V C205 1-115-156-11 CERAMIC CHIP 1uF 10V C206 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V C207 1-115-156-11 CERAMIC CHIP 1uF 10V C208 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V C301 1-115-156-11 CERAMIC CHIP 1uF 10V C302 1-115-156-11 CERAMIC CHIP 1uF 10V C303 1-126-514-11 ELECT 22uF 20.00% 6.3V C304 1-164-360-11 CERAMIC CHIP 0.1uF 16V C305 1-126-514-11 ELECT 22uF 20.00% 6.3V C306 1-117-863-11 CERAMIC CHIP 0.47uF 10.00% 6.3V C307 1-107-826-11 CERAMIC CHIP 0.1uF 10.00% 16V C308 1-115-873-11 ELECT 3.3uF 20.00% 50V C309 1-165-176-11 CERAMIC CHIP 0.047uF 10.00% 16V C311 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V C312 1-162-974-11 CERAMIC CHIP 0.01uF 50V C407 1-135-834-11 CERAMIC CHIP 2.2E+06PF 6.3V C501 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V C502 1-126-514-11 ELECT 22uF 20.00% 6.3V C503 1-126-176-11 ELECT 220uF 20% 10V C601 1-162-970-11 CERAMIC CHIP 0.01uF 10% 25V C602 1-115-467-11 CERAMIC CHIP 0.22uF 10.00% 10V C603 1-165-176-11 CERAMIC CHIP 0.047uF 10.00% 16V C604 1-165-176-11 CERAMIC CHIP 0.047uF 10.00% 16V C605 1-165-176-11 CERAMIC CHIP 0.047uF 10.00% 16V C606 1-117-863-11 CERAMIC CHIP 0.47uF 10.00% 6.3V C607 1-125-838-11 CERAMIC CHIP 2.2uF 10% 6.3V C701 1-164-361-11 CERAMIC CHIP 0.047uF 16V C702 1-107-826-11 CERAMIC CHIP 0.1uF 10.00% 16V C703 1-162-912-11 CERAMIC CHIP 7PF 0.5PF 50V C704 1-162-912-11 CERAMIC CHIP 7PF 0.5PF 50V C705 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V C706 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V C707 1-107-826-11 CERAMIC CHIP 0.1uF 10.00% 16V C708 1-107-826-11 CERAMIC CHIP 0.1uF 10.00% 16V C709 1-107-826-11 CERAMIC CHIP 0.1uF 10.00% 16V C710 1-117-863-11 CERAMIC CHIP 0.47uF 10.00% 6.3V C711 1-104-847-11 TANTAL. CHIP 22uF 20.00% 4V MAIN www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks 20 WM-FS421 C712 1-128-110-11 ELECT 470uF 20.00% 4V C713 1-128-110-11 ELECT 470uF 20.00% 4V C714 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V < TRIMMER > CT1 1-141-422-11 CAP, ADJ 10PF < DIODE > D1 8-759-072-60 DIODE SVC347T-TL D2 8-719-050-97 DIODE MA357(Q)-(TX).SO D4 8-719-050-97 DIODE MA357(Q)-(TX).SO D403 8-719-158-49 DIODE MA8120-TX D404 8-719-404-50 DIODE MA111-TX D703 8-719-049-09 DIODE 1SS367-T3SONY < FERRITE BEAD > FB101 1-500-245-11 FERRITE 0uH FB201 1-500-245-11 FERRITE 0uH FB301 1-500-245-11 FERRITE 0uH < IC > IC1 8-752-073-35 IC CXA1960Q IC301 8-759-665-91 IC LB8115W-NA-TLM IC701 8-759-457-70 IC XC62RP1602MR IC702 8-759-829-35 IC LC72348W-CFX1726 JC2 1-216-864-11 METAL CHIP 0 5% 1/16W JC9 1-216-864-11 METAL CHIP 0 5% 1/16W JC302 1-216-864-11 METAL CHIP 0 5% 1/16W JC402 1-216-864-11 METAL CHIP 0 5% 1/16W JC407 1-216-864-11 METAL CHIP 0 5% 1/16W JC408 1-216-864-11 METAL CHIP 0 5% 1/16W JC409 1-216-864-11 METAL CHIP 0 5% 1/16W JC706 1-216-864-11 METAL CHIP 0 5% 1/16W JC707 1-216-864-11 METAL CHIP 0 5% 1/16W JC708 1-216-864-11 METAL CHIP 0 5% 1/16W < COIL > L1 1-412-967-31 INDUCTOR 0.1uH L2 1-412-967-31 INDUCTOR 0.1uH L3 1-754-166-11 ANTENNA, FERRITE-ROD(MW) L4 1-424-763-11 COIL, RF (FM) L6 1-469-781-11 INDUCTOR 30nH L7 1-419-540-11 COIL, OSCILLATION (AM) L402 1-412-033-11 INDUCTOR CHIP 220uH L702 1-412-995-21 INDUCTOR 22uH < TRANSISTOR > Q3 8-729-423-52 TRANSISTOR 2SC3931-C-TX Q200 8-729-402-13 TRANSISTOR XN1501-TX Q301 8-729-422-54 TRANSISTOR XN4215-TX Q501 8-729-046-89 TRANSISTOR 2SB970-S(TX).S0 Q502 8-729-402-13 TRANSISTOR XN1501-TX Q701 8-729-046-89 TRANSISTOR 2SB970-S(TX).S0 < RESISTOR > R1 1-216-821-11 METAL CHIP 1K 5% 1/16W R3 1-216-825-11 METAL CHIP 2.2K 5% 1/16W R4 1-216-817-11 METAL CHIP 470 5% 1/16W R5 1-216-833-11 METAL CHIP 10K 5% 1/16W R6 1-216-823-11 METAL CHIP 1.5K 5% 1/16W R7 1-216-833-11 METAL CHIP 10K 5% 1/16W R8 1-216-833-11 METAL CHIP 10K 5% 1/16W R10 1-216-833-11 METAL CHIP 10K 5% 1/16W R11 1-216-833-11 METAL CHIP 10K 5% 1/16W R12 1-216-803-11 METAL CHIP 33 5% 1/16W R13 1-216-813-11 METAL CHIP 220 5% 1/16W R14 1-216-825-11 METAL CHIP 2.2K 5% 1/16W R15 1-216-845-11 METAL CHIP 100K 5% 1/16W R17 1-216-833-11 METAL CHIP 10K 5% 1/16W R18 1-216-845-11 METAL CHIP 100K 5% 1/16W R19 1-216-833-11 METAL CHIP 10K 5% 1/16W R20 1-216-821-11 METAL CHIP 1K 5% 1/16W R101 1-216-835-11 METAL CHIP 15K 5% 1/16W R102 1-216-835-11 METAL CHIP 15K 5% 1/16W R103 1-216-855-11 METAL CHIP 680K 5% 1/16W R104 1-216-819-11 METAL CHIP 680 5% 1/16W R105 1-216-819-11 METAL CHIP 680 5% 1/16W R106 1-216-831-11 METAL CHIP 6.8K 5% 1/16W R107 1-216-864-11 METAL CHIP 0 5% 1/16W R108 1-216-829-11 METAL CHIP 4.7K 5% 1/16W R200 1-216-821-11 METAL CHIP 1K 5% 1/16W R201 1-216-835-11 METAL CHIP 15K 5% 1/16W R202 1-216-835-11 METAL CHIP 15K 5% 1/16W R203 1-216-855-11 METAL CHIP 680K 5% 1/16W R204 1-216-819-11 METAL CHIP 680 5% 1/16W R205 1-216-819-11 METAL CHIP 680 5% 1/16W R206 1-216-831-11 METAL CHIP 6.8K 5% 1/16W R207 1-216-864-11 METAL CHIP 0 5% 1/16W R208 1-216-829-11 METAL CHIP 4.7K 5% 1/16W R301 1-216-829-11 METAL CHIP 4.7K 5% 1/16W R302 1-216-789-11 METAL CHIP 2.2 5% 1/16W R303 1-216-845-11 METAL CHIP 100K 5% 1/16W R304 1-216-821-11 METAL CHIP 1K 5% 1/16W R305 1-216-849-11 METAL CHIP 220K 5% 1/16W R404 1-216-821-11 METAL CHIP 1K 5% 1/16W R501 1-216-819-11 METAL CHIP 680 5% 1/16W R502 1-216-829-11 METAL CHIP 4.7K 5% 1/16W R503 1-216-833-11 METAL CHIP 10K 5% 1/16W R504 1-216-847-11 METAL CHIP 150K 5% 1/16W R601 1-216-833-11 METAL CHIP 10K 5% 1/16W R602 1-216-835-11 METAL CHIP 15K 5% 1/16W R603 1-216-821-11 METAL CHIP 1K 5% 1/16W R604 1-216-845-11 METAL CHIP 100K 5% 1/16W R605 1-216-821-11 METAL CHIP 1K 5% 1/16W R606 1-216-821-11 METAL CHIP 1K 5% 1/16W R607 1-216-837-11 METAL CHIP 22K 5% 1/16W R701 1-216-845-11 METAL CHIP 100K 5% 1/16W R702 1-216-829-11 METAL CHIP 4.7K 5% 1/16W R703 1-216-845-11 METAL CHIP 100K 5% 1/16W R706 1-216-845-11 METAL CHIP 100K 5% 1/16W MAIN www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks 21 WM-FS421 MAIN HEADPHONE R707 1-216-845-11 METAL CHIP 100K 5% 1/16W R708 1-216-849-11 METAL CHIP 220K 5% 1/16W R709 1-216-809-11 METAL CHIP 100 5% 1/16W R710 1-216-833-11 METAL CHIP 10K 5% 1/16W R711 1-216-833-11 METAL CHIP 10K 5% 1/16W R712 1-216-833-11 METAL CHIP 10K 5% 1/16W R713 1-216-833-11 METAL CHIP 10K 5% 1/16W R714 1-216-833-11 METAL CHIP 10K 5% 1/16W R715 1-216-833-11 METAL CHIP 10K 5% 1/16W R716 1-216-833-11 METAL CHIP 10K 5% 1/16W R717 1-216-857-11 METAL CHIP 1M 5% 1/16W R718 1-216-833-11 METAL CHIP 10K 5% 1/16W R720 1-216-829-11 METAL CHIP 4.7K 5% 1/16W R721 1-216-833-11 METAL CHIP 10K 5% 1/16W R722 1-216-845-11 METAL CHIP 100K 5% 1/16W < VARIABLE RESISTOR > RV1 1-223-258-11 RES, CARBON ADJ VAR 4.7K RV2 1-223-278-11 RES, CARBON ADJ VAR 100K RV301 1-225-184-11 RES, VAR, CARBON 10K/10K(wVOLUME) RV601 1-241-916-11 RES, ADJ, CARBON 4.7K(TAPE SPEED) < SWITCH > S301 1-771-040-21 SWITCH, PUSH(TAPE POWER) S302 1-771-040-21 SWITCH, PUSH(Y) S701 1-771-586-41 SWITCH, SLIDE(HOLD OFF-ON) < THERMISTOR > TH601 1-803-751-21 THERMISTOR, POSITIVE < VIBRATOR > X701 1-579-615-11 VIBRATOR, CRYSTAL(75kHz) ************************************************************** * 1-681-169-11 HEADPHONE BOARD ***************** * 1-757-684-11 WIRE (H/P MAIN PWB) < FERRITE BEAD > FB102 1-500-245-11 FERRITE 0uH FB202 1-500-245-11 FERRITE 0uH < JACK > J301 1-778-224-11 JACK (SMALL TYPE) (WATERPROOF)(i) ************************************************************** MISCELLANEOUS ************** HP701 1-500-648-11 HEAD, MAGNETIC (PLAYBACK) M601 1-763-683-11 MOTOR, DC(REEL/CAPSTAN)(WITH PULLEY) ACCESSORIES & PACKING MATERIALS ******************************** 3-221-757-11 CLIP, BELT 3-229-657-22 MANUAL, INSTRUCTION (ENGLISH,FRENCH,SPANISH,PORTUGUESE) 8-953-284-91 HEADPHONE MDR-W014LP www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com WM-FS421 REVISION HISTORY Clicking the version allows you to jump to the revised page. Also, clicking the version at the upper right on the revised page allows you to jump to the next revised page. Ver. Date Description of Revision 1.0 2001.04 New www. xiaoyu163. com QQ 376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http://www.xiaoyu163.com