索尼SONY WM-FX483电路图.pdf

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1、WM-FX483/FX485/FX487 US Model WM-FX487 Canadian Model WM-FX485/FX487 AEP Model E Model WM-FX483/FX485/FX487 SERVICE MANUAL RADIO CASSETTE PLAYER MICROFILM Model Name Using Similar MechanismWM-EX402/EX404/EX405/EX406 Tape Transport Mechanism TypeMF-WMFX483-147 SPECIFICATIONS Manufactured under licens

2、e from Dolby Laboratories Licensing Corporation. “DOLBY” and the double-D symbol a are trademarks of Dolby Laboratories Licensing Corporation. Design and specifications are subject to change without notice. Photo : WM-FX485 Ver 1.0 1998.03 ? ? ? ? ? ? ? ? ? ? 2 TABLE OF CONTENTS Flexible Circuit Boa

3、rd Repairing Keep the temperature of the soldering iron aroud 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. Notes on chip component replacement Never r

4、euse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be damaged by heat. 1.GENERAL 3 2.DISASSEMBLY 2-1.Cabinet (Front) Assy 5 2-2.Main Board 6 2-3.Mechanism Deck 6 2-4.Cassette Lid Sub Assy 7 2-5.Display Board 7 3.MECHANICAL ADJUSTMENT 8 4.ELECTRICAL ADJUSTMENT

5、8 5.DIAGRAMS IC Block Diagrams 11 5-1.Block Diagram 13 5-2.Printed Wiring Board -Main Section- 15 5-3.Schematic Diagram -Main Section- 17 5-4.Printed Wiring Board -Display Section-(FX483/FX485) 19 5-5.Schematic Diagram -Display Section-(FX483/FX485) 21 5-6.Printed Wiring Board -Display Section-(FX48

6、7) 23 5-7.Schematic Diagram -Display Section-(FX487) 25 5-8.IC Pin Function 27 6.EXPLODED VIEWS 6-1.Cassette Lid Section 29 6-2.Cabinet Section 31 6-3.Mechanism Deck Section 32 7.ELECTRICAL PARTS LIST 33 ? ? ? ? ? ? ? ? ? ? SECTION 1 GENERAL 3 ? ? ? ? ? ? ? ? ? ? 4 ? ? ? ? ? ? ? ? ? ? 5 SECTION 2 DI

7、SASSEMBLY Note : Follow the disassembly procedure in the numerical order given. 2-1.CABINET (REAR) ASSY This set can be disassembled in the order shown below. 2-1. CABINET (REAR) ASSY2-2. MAIN BOARD 2-4. CASSETTE LID SUB ASSY 2-3. MECHANISM DECK 2-5. DISPLAY BOARD 1 Screw (B 1.7 12), tapping 2 Open

8、the lid battery case. 3 3 3 Cabinet (rear) assy Claws Claws 6 5 5 5 4 ? ? ? ? ? ? ? ? ? ? 6 2-2.MAIN BOARD 2-3.MECHANISM DECK Use caution when installing the cassette holder assy Install the cassette holder with the spring (lid up) as shown below in the drawing so that it fits into the holes on the

9、cabinet front assy. Once installed, fit the left and right pieces on. 3 PC board, flexible Cabinet (front) assy HEAD flexible board 1 Screw (1.7 2.5), tapping MAIN board 4 4 5 Mechanism deck Cabinet (front) assy 2 1 1 1 ? ? ? ? ? ? ? ? ? ? 7 2-5.DISPLAY BOARD 2-4.CASSETTE LID SUB ASSY Press on the l

10、eft & right clips from the rear of the Cabinet (front) assy, and remove the boss. 2 1 Cassette lid sub assy Cabinet (front) assy 3 Spring (lid up) Cassette lid sub assy Cabinet (front) assy 2 1 Screws 1 Screws DISPLAY board Holder Cassette lid ? ? ? ? ? ? ? ? ? ? 8 SECTION 3 MECHANICAL ADJUSTMENT SE

11、CTION 4 ELECTRICAL ADJUSTMENT PRECAUTION 1.Clean the following parts with a denatured-alcahol-moistened sweb : Playback headPinch roller Rubber beltCapstan 2.Demagnetize the playback head using a demagnetizer. 3.Do not use a magnetized screwdriver for adjustments. 4.After adjusting, apply screw-lock

12、ing compound onto the adjusted parts. 5.Unless specified otherwise, use a specified voltage (3.0V) to perform the adjustments. Torque Measurement Mode FWD FWD Back Tension REV REV Back Tension FF REW Torque meter CQ-102C CQ-102RC CQ-201B Meter reading 20 - 42 g cm (0.28-0.58 oz inch) Less than 2 g c

13、m (Less than 0.03 oz inch) 20 - 42 g cm (0.28-0.58 oz inch) Less than 2 g cm (Less than 0.03 oz inch) More than 50 g cm (More than 0.69 oz inch) PRECAUTION 1.Specified voltage: 3.0V 2.Switch and control position MENU switch MENU TAPE SET: NORM MENU SOUND SET: No message MENU AVLS SET: No message MEN

14、U aNR SET: OFF (FX485/FX487) VOL control: maximum CASSETTE SECTION Test Tape Tape Speed Adjustmnet Procedure : 1.Playback WS-48A (Tape center part) and adjust RV601 so that the frequency counter reading becomes 2,985Hz to 3,015Hz. 2.Playback WS-48A (Tape top and end). Check that frequency counter re

15、ading is within 1.5% of the reading of step1. Adjustment Point : Type WS-48A Signal 3kHz, 0dB Purpose Tape Speed Adjustment Test tape WS-48A (3kHz, 0dB) Set 16 PHONES jack + Frequency counter RV601 ? ? ? ? ? ? ? ? ? ? 9 TUNER SECTION AM Setting : RADIO ON/BAND switch : ON/AM AM Tuning Voltage Adjust

16、ment ( ) : Except US, Canadian models AM IF Adjustment, AM Tracking Adjustment Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors. ( ) : Except US, Canadian models ( ) : Except US, Canadian mode

17、ls FM Setting : RADIO ON/BAND switch : ON/FM FM Tuning Voltage Adjustment FM Tracking Adjustment : East European model AM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L4620kHz (621kHz) CT21,400kHz (1,395kHz) Set PHONES + FM RF signal generator 75kHz frequency deviation by 1KHz si

18、gnal. Output level : as low as possible. 0.01F to IC1 pin 1 Level meter (AC : 0.5 5V range) 16 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 jack 16 + Level meter (AC : 0.5 5V range) 2 + digital volt

19、meter (VT) (GND) MAIN board AM TUNING VOLTAGE ADJUSTMENT Adjust for a 1.5 0.03Vde reading on digital voltmeter. L3 530kHz (531kHz) AM IF ADJUSTMENT Adjust for a maximum reading on level meter. T1 1,000 (999) kHz + digital voltmeter (VT) (GND) MAIN board FM TUNING VOLTAGE ADJUSTMENT Adjust for a 10.0

20、 0.03Vde reading on digital voltmeter. L2108MHz FM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L1 87.5MHz 65.0MHz CT1108MHz ? ? ? ? ? ? ? ? ? ? 10 FM TRACKING ADJUSTMENT CT1L1 AM TRACKING ADJUSTMENT L4 (FERRITE BAR ANTENNA) AM TRACKING ADJUSTMENT AM TUNING VOLTAGE ADJUSTMENT L3

21、FM TUNING VOLTAGE ADJUSTMENT L2 AM IF ADJUSTMENT T1 CT2 MAIN BOARD SIDE A MAIN BOARD SIDE B J301 C606 C701 C306 1 1 1 3 2 18 17 1 1 2 18 17 C34 CT1 CT2 R18R21 R6 S601 MD CONTROL RVS REW FWD FF 6 FX483 MODEL FX483 MODEL FX485/ FX487 MODELS EXCEPT US,CND,C&SA FX485/ FX487 MODELS C36 C105 C205 C37 S701

22、 HOLD OFF ON RV301 VOL 3 R19 R20 C17 C16 Q4 TP(VT) TP (VT) TP(GND) TP (GND) TP(ANT) TP (ANT) L3 L2 T1 L1 FL1 GNDVCCDATAREMO L4 L R ? ? ? ? ? ? ? ? ? ? 11 SECTION 5 DIAGRAMS Note on Schematic Diagram: All capacitors are in F unless otherwise noted. pF: F 50 WV or less are not indicated except for ele

23、ctrolytics and tantalums. All resistors are in and 1/4 W or less unless otherwise specified. C : panel designation. U : B+ Line. H : adjustment for repair. Total current is measured with no cassette installed. Power voltage is DC 3V and fed with regulated DC power supply from external power voltage

24、jack. Voltages and waveforms are DC with respect to ground under no-signal (detuned) conditions. no mark : FM/PB () : AM : Impossible to measure 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:

25、PB Note on Printed Wiring Board: Y : parts extracted from the conductor side. : Through hole. b : Pattern from the side which enables seeing. (The other layers patterns are not indicated.) Caution: Pattern face side:Parts on the pattern face side seen from (Conductor B)the pattern face are indicated

26、. Parts face side:Parts on the parts face side seen from (Component A)the parts face are indicated. IC BLOCK DIAGRAMS IC1 TA2104 242322212019181716151413 DECODE DIVIDE VCO 111098765432112 FM RF OUT RF GNDFM RF INAM IF INFM IF INGNDAGCQUADR-OUTL-OUTAM LOW CUT MIX OUTVCC RF VCCAM RF INFM OSCAM OSCOSC

27、OUTST LEDIF REQDET OUTLPF1LPF2 FM OSC AM OSC AM MIX FM MIX BUFF BUFF FM RF AMIFFMIF AGC MUTE ST/MO FM/AM FM DET AM DET 1/8 LEVEL DET IF BUFF AF BUFF AF IF REQ SW ST Abbreviation CND: Canadian IT: Italian EE: East European FR: French C & SA : Central and South America Abbreviation CND: Canadian IT: I

28、talian EE: East European FR: French C & SA : Central and South America ? ? ? ? ? ? ? ? ? ? 12 IC601 MM1370 201918 17 16 1514 1312 78109654123 11 OUTPUT BIAS CIRCUIT CURRENT CONTROL VELOCITY CONTROL START-UP OSCILLATION CIRCUIT START-UP CONTROL CIRCUIT ERROR AMP PHASE SELECT CIRCUIT PRE DRIVER START-

29、UP LOGIC FORWARD/REVERSE SELECT SWITCH GND-2 FC RI OUT VSP IN+ VREF START COM OSC PU VCC DR U V W P-GND PV PW GND-1 IC301 LA4585M 2818 29 17 16 15 14 13 12 10 89 11 30 31 32 33 34 35 36 25 24 23 22262721 20 R.F REF REF REF REF 19 REF REF LOW BOOST SYS. CONT DET DET MIX.2 MIX.1 6745321 PWR.C PWR.1 PW

30、R.2 MIX IN (R) HP IN (R) LP1 L.B.GAIN M.B.ON/OFF LP2 DET1 FWD/REV PWR IN (R) MIX OUT (R) MIX OUT (L) RIPPLE REF FWD (L) FWD (R) REV (R) REV (L) NF (L) NF (R) MIX IN (L) HP IN (L) SW OUT (L) SW OUT (R) PRE OUT (L) PRE OUT (R) PRE GND PRE MUTE POWER MUTE PWR OUT (R) VCC COM PWR GND PWR OUT (L) AVLS DE

31、T2 PWR IN (L) PRE2PRE1 IC331 NJM2185V 1413 121110 98 4321567 WEIGHT G2G1V/I BIAS CIRCUIT Bch BLOCK (same Ach) VCC ON/OFF VEXT INR OUTR DCR DETR GND IREF VREF INL OUTL DCL DETL SUM Gm Ach BLOCK ? ? ? ? ? ? ? ? ? ? WM-FX483/FX485/FX487 14 13 5-1.BLOCK DIAGRAM BATT IN 38 BATT DET 42 FUNCTION KEY S701 B

32、AND 59 POWER CONT Q708 FL1 B.P.F FM/AM RF,IF IC1 LOCAL/DX MODEL DC/DC CONV. Q401,T401 SWITCH Q1,2 DC MOTOR M901 BATT +B T1 AM IFT CF2 10.7MHz CF1 450kHz TUNER VCC 450kHz D401 D1 D3 CT1 D2 CT2 L1 FM RF L2 FM OSC L4 BAR ANT L3 AM OSC FM RF IN2 MIX OUT4 FM IF IN7 AM IF IN6 FM RF24 FM OSC21 AM OSC20 AM

33、RF22 LPF114 LPF213 IF REQ17 L.P.F Q704,705 VCO BUFFER Q4 VCO BUFFER Q703 OSC OUT 19 L OUT 12 R OUT 11 QUAD 10 R CH X1 107MHz R CH R CH FWD REV L L R R REF FWD 28 NF 31 26 25 FWD/REV 11SYS CONT REC MUTE 10 PRE MUTE 9 MUTE Q305 MUTE Q306 Q101 5 54 13 ON/OFF DOLBY NR IC331 FX485/487 MODEL AUDIO POWER A

34、MP IC301 REV 20 19 MIX HP LB GAIN15 MB ON/OFF14 SW Q301 341 VOLUME RV301 PWR AVLS Q310 4 COM6 3 VCC 7 REF DC Q311 12 DET B+ FX483 MODEL R CH GND REMO DATA VCC COM L CH Q305 Q304 TUNER VCC S702-715 FWD FF REW RVS OFF ON HOLD REG IC702 MD CONT S601 SW Q706 FM MODE 31 VCO(FM) 70 EO 65 IF REQ 61 IF IN 6

35、4 TAPE SELECT 32 VCO(AM) 71 FWD/REV 28 MUTE 62 DOLBY 27 GROOVE 48 AD IN2 43 MEGA BASS 47 AVLS 30 BEEP 49 AD IN3 44 HOLD SENS 40 HOLD 41 FWD 58 FF 57 REW 56 REV 55 RIPPLE FILTER Q52,53 RADIO +B SWITCH Q51 BATT +BVCC5 RADIO ON 60 TUNER VCC AMP CTL 46 SYSTEM CONTROL IC701 POWER SWITCH Q707 OPEN DET 39

36、OPEN DET S301 31 POWER AMP SW Q307 AMP CONT Q308 AD REF 45 L701 D701 VDD 72 RESET 73 BATT +B +B MOTOR BRK 52 AMP Q701 PHOTO RIFLECTOR Q702 PH701 PHOTO CTL 53 PHOTO IN 54 BRAKE SWITCH Q602-604 MOTOR STSRT SW Q608 MOTOR SPEED SW Q605 MOTOR DIRECTION Q609 TAPE SPEED TAPE RV601 Q607 Q606 Q610 MOTOR CTL

37、51 MOTOR SPEED 25 MOTOR DIR 50 START 13 IN 15 V REF 14 DIR 3 MOTOR SERVO IC601 U4 V5 W6 Q601 522 X IN 75 X OUT 74 X701 75kHz 14 COM1COM4S1S18 16 ND701 LCD PHONES J301 : FM Signal Path RCH is omitted : PB : AM J302 DC IN DRY BATT SIZE AA (IEC DESIGNATION R6) 2PCS 3V ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

38、? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? WM-FX483/FX485/FX487 12 A B C D E F G H I 345678910111213 16 15 5-2.PRINTED WIRING BOARD MAIN SECTION Refer to page 11 for Note on Printed Wiring Board. MAIN BOARD (SIDE A)MAIN BOARD (SIDE B) B TO DISPLAY BOARD CN702 A TO DISPLAY BOARD CN701 1-667-933- 11

39、(11) 1-667-933- 11 (11) FX485/FX487 MODELS US,CND,C&SA MODELS DRY BATTERY SIZE AAA (IEC DESIGNATION R6) 2PCS, 3V 16 L R L R HP901 (PLAYBACK HEAD) 2 6 3 4 5 1 M901 REEL/CAPSTAN MOTOR PH701 J301 REV FWD DC IN 3V J302 C606 C701 C306 1 1 1 3 2 18 17 1 1 2 18 17 C34 CT1 CT2 R18R21 R6 S601 MD CONTROL RVS

40、REW FWD FF 6 FX483 MODEL FX483 MODEL FX487 MODEL FX485/ FX487 MODELS EXCEPT US,CND,C&SA FX485/ FX487 MODELS C36 C105 C205 C37 S701 HOLD OFF ON RV301 VOL 3 R19 R20 C17 C16 Q4 TP(VT) TP(GND) TP(ANT) L3 L2 T1 L1 FL1 GNDVCCDATAREMO L4 L R D401 D402 C316 S301 (OPEN) Ref. No.Location D1C-10 D2B-9 D3B-9 D4

41、01H-4 D402I-4 D701H-11 IC1C-9 IC301G-9 IC331E-5 IC601H-9 IC702H-11 Q1V-4 Q2B-5 Q4D-10 Q51E-11 Q52F-11 Q53F-10 Q101F-9 Q201F-9 Q301E-4 Q304G-9 Q305G-9 Q306G-9 Q307G-3 Q308G-3 Q310G-8 Q311F-4 Q401H-5 Q601H-4 Q602H-4 Q603H-4 Q604I-3 Q605H-8 Q606H-8 Q607H-3 Q608H-3 Q609H-4 Q610H-3 Q701E-2 Q702F-2 Q707G-

42、3 Q708G-3 Semiconductor Location ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? WM-FX483/FX485/FX487 18 17 5-3.SCHEMATIC DIAGRAM MAIN SECTION Refer to page 11 for Note on Schematic Diagram. ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? WM-FX483/FX485/FX487 12 A B C D E F G H I 345678910111213 20 19 5-4.PRINTED WIRING BOARD