Sony Walkman WM-FX488 Service Manual Download Page 10

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WM-FX488

DET

OSC

1/8 or 1/16

MIX

OSC

Q302

REF

Q401

OSC

MUTE

RF & RET

Q701,702

LPF

19 - 5

1 - 4

VDD

VCC

VBAT

Q705

Q704

4 OUT

VCC

VBAT

VCC

START

V
U

COM

V
U

VCC

L-CH

R-CH

FWD

R-CH

L-CH

REV

DRIVER

CONTROL

PRE

DRIVER

FM MPX

FM/AM/TV

PW SW

10 7

VREF

FM-

TRACKING

CT1,L4

TRACKING

FM-

OSC

AM-OSC

FREQUENCY

COVERAGE

BAR ANTENNA

(FM DISC)

QUAD

CT1

AM RF IN

FM/TV OSC

FMRFOUT

IF BAFF

FM
RF IN

FM-
IF IN

DET
OUT

MPX
IN

R-CH

JC2

E, CH

AM-
MIX

AM-
IF IN

AM B/P

AM OSC

(VT)

OSC BUFF

CF3

(AM-IF)

D402

VBATT

Q402

Q703

VREF

Q101

Q305
AVLS

IC301

PRE/POWER

AMP

Q201

Q202

Q102

VCC

RF VCC

T401

T401,Q401

DC/DC CONVERTER

INA

INB

RF
OUT

VREF

BASE

VCC

VREF

Q301

INV.

PRE
OUTA

PRE
OUTB

RV301

VOL

R-CH

PW
IN A

PW
IN C

BST OUT

BST SW

PW NFA

PW NFB

OUTA

OUTC

PW MUTE

PRE MUTE

R-CH

MUTE CTL

FWD/REV CTL

FWD/REV SW

BATT CHECK

TAPE

PRE CTL

P-CTL

AMP CTL

Q707

D701

IC701 (2/2)

SYSTEM

CONTROL

IC703

RESET

CF1

(FM IF)

IC1

FM/AM FRONT END

IF DET, FM MPX

IC701 (1/2)

SYSTEM

CONTROL

IC601

CAPSTAN/REEL

MOTOR DRIVE

LOUT

ROUT

LPF1

REQSW

OSC OUT

MODE-1

MODE-2

COUNT

STEREO/MONO,
LOCAL/DX

IFJN1

IF-REQ

BAND1

BAND2

OSCIN

RADIO ON

DO(OT)

AVLS CTL

MB CTL

VDD

E, CH

VDD

S16

COM1

COM4

K3
K2

KO2

KO1

HOLD SW

MODE2

MODE1

RESET

X-OUT

X-IN

BEEP

Q303

EQ SWITCH

X701

75KHz

R-CH

FM-
MIX

LCD701

LIQUID

CRYSTAL

DISPLAY

S703

PRESET/TUNING-

RV601

TAPE SPEED

S710

PRESET/

S706

ENTER

S707

SET

S707

RADIO

OFF

S709

S701

HOLD

OFF

IN+

M601

CAPSTAN/REEL

MOTOR

S302

N/R SW

S301

TAPE ON

BATT 1.5V

DRY BATTERY

SIZE"AA"

(IEC DESIGNATION LR6)

1PS,1.5V

HP601

PLAY BACK HEAD

J301

MIX

• Signal Path

: FM

: AM

: PB

• R-CH is omitted due to same as L-CH.

4-2. BLOCK DIAGRAMS

Ver 1.1 2003.01

• Abbreviation

: Chinese

: No indication of country of origin

: Indication of country of origin

Summary of Contents for Walkman WM-FX488

Page 1: ...ojecting parts and controls Mass Appr ox 138 g 4 9 oz main unit only Supplied accessories Stereo headphones or Stereo earphones 1 Carrying case with belt clip 1 Design and specifications are subject to change without notice Battery life approximate hours Sony alkaline LR6 SG Sony R6P SR Tape playback 35 9 Radio reception 40 14 Measured value by the standard of JEITA Japan Electr onics and Informat...

Page 2: ...ism Deck Section MF WMFX488 114 18 6 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 on the conductor when soldering or unsoldering Notes on chip component replacement Never reuse a disconnected ch...

Page 3: ... Cabinet center Holder Cassette Mechanism deck Belt Capstan reel motor M601 Magnetic head playback HP601 Set Cabinet front Cabinet front Cabinet center Holder Cassette 4 Claws 2 5 1 Claws 1 Claws 3 Claws 1 Claws Main board 4 Screw M1 4 WH 5 Screw S701 Hold knob Head flexible board 1 Remove solder six places 2 Remove solder four places 3 Lid battery case 6 z CAUTIONS DURING ASSEMBLY Align position ...

Page 4: ...IC HEAD PLAYBACK HP601 Mechanism deck Cabinet center 1 Claws 2 Wheel ASSY P capstan Wheel ASSY P capstan Belt How to apply the belt Capstan reel motor M601 1 Belt 5 Magnetic head PLAYBACK HP601 3 Capstan reel motor M601 4 Two screws M1 4 2 Two screws M1 4 Mechanism deck ...

Page 5: ...assette 4 Close the Holder cassette then press it 2 5 HOLDER CASSETTE z CAUTIONS DURING ASSEMBLY Holder Cassete 1 5 Hinge Hinge Hinge Projection Hinge Projection 3 Move the hinge away from projection 2 Move the hinge away from projection 4 Spring torsion 2 Spring torsion Spring 2 Hinge 3 Hinge Holder cassette 4 ...

Page 6: ...g cm back tension less than 0 027 oz inch FF REW CQ 201B more than 5 89 mN m more than 60 g cm more than 0 84 oz inch SECTION 3 ADJUSTMENTS 3 2 ELECTRICAL ADJUSTMENTS PRECAUTION Supplied voltage 1 3V Switch and control position MENU display MEGA BASS OFF VOLUME control RV301 maximum AVLS OFF No indicated FM MODE STEREO No indicated TAPE SECTION Test Tape Type Signal Used for WS 48A 3kHz 0dB Tape S...

Page 7: ...tion Main board See page 8 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 the set set 16 Ω phones jack J301 level meter Frequency Coverage Adjustment Se...

Page 8: ...8 WM FX488 Adjustment Location MAIN BOARD SIDE A IC1 TP30 TP12 VT L5 AM Frequency Coverage Adjustment L2 FM Tracking Adjustment L4 AM Tracking Adjustment CT1 AM Tracking Adjustment TP30 FM Sgnal input ...

Page 9: ...n terminal 60 C2 Capacitor conection terminal 61 VEE Capacitor conection terminal 62 C3 Capacitor conection terminal 63 C4 Capacitor conection terminal 64 VLCD Capacitor conection terminal 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 otherwise s...

Page 10: ...Q301 INV PRE OUTA PRE OUTB RV301 VOL R CH PW IN A PW IN C BST OUT BST SW PW NFA PW NFB OUTA OUTC PW MUTE PRE MUTE R CH MUTE CTL FWD REV CTL FWD REV SW BATT CHECK TAPE PRE CTL P CTL AMP CTL Q707 D701 IC701 2 2 SYSTEM CONTROL IC703 RESET CF1 FM IF IC1 FM AM FRONT END IF DET FM MPX IC701 1 2 SYSTEM CONTROL IC601 CAPSTAN REEL MOTOR DRIVE LOUT ROUT LPF1 REQSW OSC OUT MODE 1 MODE 2 IF COUNT STEREO MONO ...

Page 11: ...05 C403 R12 C23 C46 D5 R214 R114 1 10 11 20 1 15 16 30 11 11 1 685 793 MAIN BOARD SIDE A B ON OFF t Q301 Q302 Q701 Q702 C705 IC701 TH601 CN101 Q704 C301 Q202 Q102 Q101 Q201 C324 CF3 D2 IC301 R604 C711 R605 S302 N R SW R7 R5 C20 C26 C19 C7 C56 C31 C715 L701 D701 C104 C204 C203 R203 R201 R221 LCD701 R106 R206 C312 C325 C311 C208 C108 R209 R109 R310 C209 C109 C310 C322 C701 C703 C704 JC703 E CH 6E JC...

Page 12: ...47 470p 4 7 16V 0k 22 6 3V 220 4V 0 022 5p 470p 2200p MA2S357 1p 10k 22p AM OSC 470p 0 022 470k 0 022 470k 0 022 10p FM RF 2200p 2200p MA2S357 100k 0 01 4 7k 0 01 0 1 10k 100p 10k 0 SVC347 T TL 22k 22k 100p 2 2k 2SB815B7 TA2154FN EL 6p 6p 27nH 0 001 0 1k 1k MA2SP0100LSO 1000p L OUT R OUT IN OUT C RF OUT RADIO ON GND BAND1 BAND2 IF IN IF REQ OSC IN VT LOCAL DX 1 1 2 2 AM ANTENNA L4 BAR FM TRACKING ...

Page 13: ...0k 2 2k 1SS367 470 4V 470 4V 220 4V 220k 0 01 220k 220k 0 01 0 1 100 0 1 0 22 1 22k 0 01 3 3K 1 4 7k 2 2k 1k 0 1 10k 2SB815B7 1k 10p 22p 0 1 10 6 3V 0 47 0 1 0 1 0 1 75KHz 2200p 100k 0 47 22 4V 1 LCD1 10k 10k 10k 10k 10k 10k 100k 47k 1k TAPE ON N R SW 100k 0 1 0 01 0 01 10k 0 01 10k 4 7k 100k 0 1 470k 10k 1M 1 10k 2SC4154 LPF 2SC4154 LPF 2SC4154 2SB815B7 MM1279XVBE CAPSTAN REEL MOTOR DRIVER PST900...

Page 14: ...20k 22 4V 4700p 470 470k 10k 22k 470k 10k 22k 4700p 470 22 4V 220k 22 4V 1000p 1 1 1k XP1116 TX AVLS CONTROL SWITCH 100 100 100k 100k 2SC2712 2SA1362 Y 2SA1362 Y 470p 470p 220k 220k 100k 1 1k 1k 1 1 1000p 1000p 1 4 7 1k 1k 2 2 2 2 0 1 2 2 1 10 6 3V 0 22 4 7 0 22 0 22 4 7 4 7 0 1 470k 4 7k 4 7k 0 022 0 022 22 0 047 100k 2SA1362 Y 2SA1362 Y 100k 0 22 TA2160FN EL PRE POWER AMP 2SA1362 Y XP1501 6P 1k ...

Page 15: ...C AM RF IN OSC OUT TV RF OUT FM RF OUT AM BYPASS AM OSC MODE2 MODE1 IF REQ IF COUNT LPF2B LPF2A L OUT RFVCC 30 29 27 28 23 24 25 26 22 21 11 BUFF IF BUFF BUFF BUFF FM IF AM IF AF TV RF FM RF 12 13 14 19 15 8 9 10 PRE OUT B BST SW PW INA PW NFB PW INB PW MUTE PRE MUTE AGC DET PW GND PW NFA 1 4 2 3 5 6 PRE NFB PRE NFA PRE OUT A VREF PRE GND 7 RF REF BST SW AGC DET AGC 18 17 16 20 LPF VREF IN BSF NF ...

Page 16: ... 18 20 1 2 3 4 5 6 7 8 9 10 19 12 PRE DRIVER SOFT SWITCH MOTIVE LOGIC MOTIVE OSC BIAS REFERENCE VOLTAGE MOTIVE CONTROL CIRCUIT INVERTER SPEED CONTROL CURRENT CONTROL OUTPUT BIAS PV V PW W GND OSC DR VREF START VSP IN U PU GND VCC FC TC1 TC2 R1 OUT ...

Page 17: ...mark 5 1 CABINET SECTION 1 6 2 3 4 9 10 18 13 15 16 17 19 20 21 14 11 12 7 8 5 LCD701 Mechanism deck MF WMFX488 114 L4 1 3 019 859 11 BUTTON STOP 2 3 019 860 11 BUTTON FF 3 3 019 858 11 BUTTON PLAY 4 3 019 861 11 BUTTON REW 5 3 245 288 01 KNOB HOLD 6 3 245 284 11 CABINET CENTER 7 3 245 293 01 SPRING CASSETTE 8 3 245 294 01 SPRING TORSION 9 3 245 285 01 HOLDER CASSETTE 10 3 921 955 01 SCREW M1 4 TO...

Page 18: ... 223 11 GEAR REEL 2 106 3 921 797 01 WASHER 107 3 920 993 02 SPRING NR 108 3 014 709 01 SPRING FR LEVER OW 109 3 938 657 01 BELT 110 X 3380 431 1 CHASSIS COMP ASSY GL SL 111 3 013 142 02 SPRING FR CP 112 3 921 053 01 LEVER D SELECTION 113 X 3376 169 5 CLUTCH ASSY 114 3 920 990 21 SPRING UD COMPRESSION 115 3 921 335 03 WASHER LEVER 116 3 923 530 11 SLEEVE M 117 3 728 091 01 WASHER STOPPER 118 3 921...

Page 19: ...36 1 162 970 11 CERAMIC CHIP 0 01uF 10 25V C41 1 115 416 11 CERAMIC CHIP 0 001uF 5 25V C44 1 164 227 11 CERAMIC CHIP 0 022uF 10 25V C46 1 115 416 11 CERAMIC CHIP 0 001uF 5 25V 6E C56 1 162 911 11 CERAMIC CHIP 6PF 0 25PF 50V C101 1 162 962 11 CERAMIC CHIP 470PF 10 50V C103 1 162 968 11 CERAMIC CHIP 0 0047uF 10 50V C104 1 104 847 11 TANTAL CHIP 22uF 20 4V C106 1 115 156 11 CERAMIC CHIP 1uF 10V C107 ...

Page 20: ...3 1 419 135 21 INDUCTOR 27nH L4 1 754 265 11 ANTENNA FERRITE ROD AM TRACKING L5 1 428 859 11 COIL AM OSC AM FREQUENCY COVERAGE L401 1 412 010 41 INDUCTOR 22uH L701 1 412 995 21 INDUCTOR 22uH TRANSISTOR Q101 8 729 230 72 TRANSISTOR 2SA1362YG Q102 8 729 230 72 TRANSISTOR 2SA1362YG Q201 8 729 230 72 TRANSISTOR 2SA1362YG Q202 8 729 230 72 TRANSISTOR 2SA1362YG Q301 8 729 230 49 TRANSISTOR 2SC2712 YG Q3...

Page 21: ...METAL CHIP 10K 5 1 10W R604 1 216 821 11 METAL CHIP 1K 5 1 10W R605 1 216 825 11 METAL CHIP 2 2K 5 1 10W R609 1 216 849 11 METAL CHIP 220K 5 1 10W R610 1 216 849 11 METAL CHIP 220K 5 1 10W R611 1 216 849 11 METAL CHIP 220K 5 1 10W R701 1 216 821 11 METAL CHIP 1K 5 1 10W R702 1 216 829 11 METAL CHIP 4 7K 5 1 10W R703 1 216 845 11 METAL CHIP 100K 5 1 10W R705 1 216 833 11 METAL CHIP 10K 5 1 10W R706...

Page 22: ...sion 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 2002 10 New 1 1 2003 01 Addition of 6E model ENG 03001 ...

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