Sony Walkman WM-FX277 Service Manual Download Page 9 | Manualshive

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9

WM-FX277

Adjustment Location :

[MAIN BOARD]

(SIDE A)

L3 : FM Frequency Coverage Adjustment

L2 : FM tracking Adjustment

L4 : AM Frequency Coverage Adjustment

T1 : AM IF Adjustment

CT1 : AM Tracking Adjustment

L1 : AM Tracking Adjustment

IC1

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Summary of Contents for Walkman WM-FX277

Page 1: ...ANUAL RADIO CASSETTE PLAYER SPECIFICATIONS E Model Chinese Model Model Name Using Similar Mechanism NEW MD Mechanism Type MF WMFX241 114 9 927 695 31 2001C0200 1 2001 3 Sony Corporation Audio Entertainment Group General Engineering Dept ...

Page 2: ... Wiring Boards Main Section Side B 13 5 5 Schematic Diagram 14 6 EXPLODED VIEWS 6 1 Cabinet Section 17 6 2 Mechanism Deck Section MF WMFX241 114 18 7 ELECTRICAL PARTS LIST 19 Flexible Circuit Board Repairing Keep the temperature of the 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...

Page 3: ... Window LCD and itself as shown in the figure 1 Insert the precision screwdriver Cover a point by cloth in to the slit at claw 2 Remove the window LCD Note Be careful not to damage claws Claws Window LCD Claws Claws RV601 SECTION 2 GENERAL This section is extracted from instruction manual LOCATION AND FUNCTION OF CONTROLS ...

Page 4: ...ette holder ASSY Cabinet Front Cassette holder Mechanism deck Belt Capstan reel motor M601 Magnetic head Playback HP601 Set Cabinet Front Cassette holder ASSY 4 Claws 4 Claw 2 5 1 Claws 1 Claws 3 Claws 1 Claws Main board 1 Screw Orange Black White Red Cassette holder ASSY Head flexible board 2 Remove solder 3 Claws 4 Note Use the precision driver with coverd a point by cloth to release the claw Be...

Page 5: ... 3 4 BELT CAPSTAN REEL MOTOR M601 MAGNETIC HEAD PLAYBACK HP601 Mechanism deck Cassette holder ASSY 1 Claws 2 2 Belt Stopper 1 Claw 6 magnetic head PLAYBACK HP601 4 Capstan reel motor M601 3 Screws M1 4 5 Screws M1 4 Mechanism deck ...

Page 6: ...te holder then press it 3 5 CASSETTE HOLDER z CAUTIONS DURING ASSEMBLY Cassette holder 4 Spring torsion Hinge Hinge Projection 1 5 Hinge Cabinet center Hinge Projection Projection Projection 3 Move the hinge away from projection 2 Move the hinge away from projection Spring torsion L shape slot Hinge Hinge Cassette holder Cabinet center 1 2 4 3 ...

Page 7: ... 027 oz inch FF REW CQ 201B 5 89 to 19 61 mN m 60 to 200 g cm 0 84 to 2 77 oz inch SECTION 4 ADJUSTMENTS 4 2 ELECTRICAL ADJUSTMENTS PRECAUTION Supplied voltage 2 5V Switch and control position MEGA BASS S709 OFF VOLUME control RV301 maximum AVLS S304 NORM TAPE SECTION Test Tape Type Signal Used for WS 48A 3kHz 0dB Tape Speed Adjustment Tape Speed Adjustment Procedure 1 Playback WS 48A tape center ...

Page 8: ... Adjust for a maximum reading on level meter L2 98MHz Confirmation 108MHz Adjustment Location Main board 0 dB 1µV Repeat the procedures in each adjustment several times and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors AM RF signal generator 30 amplitude modulation by 400Hz signal Output level as low as possible Put the lead wire antenna close to ...

Page 9: ...Adjustment Location MAIN BOARD SIDE A L3 FM Frequency Coverage Adjustment L2 FM tracking Adjustment L4 AM Frequency Coverage Adjustment T1 AM IF Adjustment CT1 AM Tracking Adjustment L1 AM Tracking Adjustment IC1 ...

Page 10: ...2 BATT REF I A D reference voltage input 23 Not used Ground 24 VSS Ground terminal 25 RADIO ON O Radio ON signal output 26 MEGA BASS O MEGA BASS ON signal output 27 MUTE O Mute ON signal output 28 TAPE I Tape ON input 29 PRE CTL O Preamplifier control output 30 MOTOR CTL O Motor control output 31 ID I Destination select input 32 44 S1 13 O LCD segment output 45 48 COM1 4 O LCD common output 49 52 ...

Page 11: ...PRE OUT L PRE NF L VSP IN M VREF L B SW MIX IN L H PIN L SYSTEM POWER OUT L POWER OUT COM POWER MUTE OUT MOTOR CONTROL REF VOLTAGE FOR SPEED CONTROL CURRENT DETECT WAVE FORME DETECT SOFT SWITCH PRE DRIVER BIAS R CH R CH HEAD PLAYBACK HP601 IC301 NORM AM IN FM RF FM OSC AM OSC L 0 R 0 TUN LED FM IF AM IF FM IN FM AM MIX LPF2 LPF1 IN OUT MPX DET AM AM AM QUAD AM ANTENNA L1 RF FM L2 FM L3 OSC OSC L4 ...

Page 12: ... C5 C6 C7 TH601 IC702 IC301 R302 R204 R722 C714 R703 IC1 R721 C716 C203 C103 C602 C601 R602 C715 C307 R726 R724 C314 D2 1 5 10 12 13 15 20 24 R15 R16 C25 C26 R5 R17 C13 R23 C42 C41 R10 C12 L702 L5 L401 L6 R21 R22 C23 C24 C43 Q301 Q502 C46 Q2 A B C D E F 2 3 4 5 6 7 8 9 10 5 3 PRINTED WIRING BOARDS MAIN SECTION SIDE A Note X parts extracted from the component side a Through hole Pattern from the si...

Page 13: ... OUT C2 R1 R2 C34 C35 C36 C3 D3 R8 R7 R13 C10 C9 C8 C29 C30 C17 C20 C18 C19 R12 R9 C27 R14 R11 C21 C4 R4 C14 C16 R18 C39 R3 R401 C401 R402 C403 C404 R403 R404 C44 C45 JR2 JR4 JR5 R107 R20 FB101 FB201 FB301 D401 C405 C406 C407 RV601 Q1 C712 VDD C503 X701 T401 C303 C308 C305 C502 C104 C204 T1 C22 CF1 CF2 CP1 L2 L3 C402 C28 X2 L4 RV301 VOLUME w RV301 LCD701 G D E F A B C 1 3 4 5 6 7 8 9 10 11 Note X ...

Page 14: ...PB2 PB3 PA0 PA1 PA2 TEST2 S12 S11 S10 S9 S8 S7 S6 S5 S4 S3 S2 S1 COM4 COM3 COM2 COM1 PB1 PA3 X OUT X IN LOCAL DX NORM CrO2 METAL ENTER AM FM PRESET PRESET MEGA BASS TUNING OFF RCH LCH HEAD PLAYBACK 1 2 AVLS NORM LIMIT DRY BATTERY SIZE AA 2PCS 3V IEC DESIGNATION R6 W V U CAPSTAN REEL MOTOR VOLUME 1 2 LB8115W NB TLM AM ANTENNA AM IN FM RF FM OSC AM OSC L 0 R 0 QUAD ST LED TUN LED GND FM IF AM IF AGC...

Page 15: ...to ground under no signal detuned conditions no mark FM AM PLAY TAPE Voltages are taken with a VOM Input impedance 10 MΩ Voltage variations may be noted due to normal produc tion tolerances Waveforms are taken with a oscilloscope Voltage variations may be noted due to normal produc tion tolerances Signal path F FM f AM E PB Abbreviation MX Mexican CH Chinese E Indication of country of origin ST FM...

Page 16: ...LM 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 OUT COM POWER OUT R VCC POWER MUTE POWER IN L POWER IN R MIX OUT L MIX OUT R LP 2 H P IN R H P IN L DET OUT MVREF IN VSP MIX IN R MIX IN L LOW BOOST SW M GND R REF SYSTEM POWER OUT L 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 P...

Page 17: ...k 6 1 CABINET SECTION L1 LCD701 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 3 227 307 11 CABINET FRONT 2 3 227 308 11 WINDOW LCD 3 3 227 309 01 KNOB HOLD 4 3 227 310 01 BUTTON PRESET 5 3 015 285 01 SCREW M1 4 TOOTHED LOCK WH 6 A 3021 397 A MAIN PC BOARD ASSY 5E 6E MX 6 A 3021 398 A MAIN PC BOARD ASSY E 9E TW CH 7 3 227 312 01 STOPPER 8 3 227 317 01 BUTTON STOP 9 3 227 315 01 BUTTON FF 10 ...

Page 18: ...73 SCREW M1 4 SPECIAL HEAD 55 3 019 776 01 GEAR REEL S 56 3 921 797 01 WASHER 57 3 036 664 01 SPRING FR LEVER OWN 58 3 013 560 11 BELT 59 3 022 094 01 SPRING STOP S 60 3 022 093 01 SPRING FR S 61 X 3374 598 1 CLUTCH ASSY S 62 3 920 990 01 SPRING UD COMPRESSION 63 3 921 335 01 WASHER LEVER 64 3 019 778 01 SLEEVE MS 65 3 728 091 01 WASHER STOPPER 66 3 019 777 01 LEVER OWS DETECTION 67 3 704 197 01 S...

Page 19: ...CH C27 1 162 974 11 CERAMIC CHIP 0 01uF 50V C28 1 126 176 11 ELECT 220uF 20 10V C29 1 162 964 11 CERAMIC CHIP 0 001uF 10 50V 5E 6E MX C30 1 162 964 11 CERAMIC CHIP 0 001uF 10 50V E 9E TW CH C34 1 162 917 11 CERAMIC CHIP 15PF 5 50V C35 1 162 961 11 CERAMIC CHIP 330PF 10 50V C36 1 115 156 11 CERAMIC CHIP 1uF 10V C40 1 162 966 11 CERAMIC CHIP 0 0022uF 10 50V C41 1 113 619 11 CERAMIC CHIP 0 47uF 10V C...

Page 20: ... 1 412 995 21 INDUCTOR 22uH TRANSISTOR Q1 8 729 117 72 TRANSISTOR 2SC4178 F13 Q2 8 729 117 72 TRANSISTOR 2SC4178 F13 Q301 8 729 427 51 TRANSISTOR XP4215 TXE Q401 8 729 230 63 TRANSISTOR 2SC4116 YG Q501 8 729 046 89 TRANSISTOR 2SB970 S TX S0 Q502 8 729 429 44 TRANSISTOR XP1501 Q701 8 729 046 89 TRANSISTOR 2SB970 S TX S0 RESISTOR R1 1 216 851 11 METAL CHIP 330K 5 1 16W R2 1 216 839 11 METAL CHIP 33K...

Page 21: ... 11 METAL CHIP 1M 5 1 16W R718 1 216 831 11 METAL CHIP 6 8K 5 1 16W R720 1 216 833 11 METAL CHIP 10K 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 R724 1 216 833 11 METAL CHIP 10K 5 1 16W E 9E TW CH R726 1 216 864 91 SHORT 0 5E 6E MX VARIABLE RESISTOR RV301 1 225 953 31 RES VAR MAIN CARBON 10K 10K VOLUME RV601 1 238 663 11 RES ADJ CARBON 4 7K TAPE SPEED...

Page 22: ...TORY 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 03 New ...

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