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Sony WM-FX671, Service Manual

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WM-FX671

US Model

AEP Model

SERVICE MANUAL

RADIO CASSETTE PLAYER

Manufactured under license from Dolby Laboratories
Licensing Corporation.
“DOLBY” and the double-D symbol 

a

 are trademarks

of Dolby Laboratories Licensing Corporation.

Model Name Using Similar Mechanism

WM-EX678

Tape Transport Mechanism Type

MT-WMEX672-162

SPECIFICATIONS

Sony Corporation

Personal Audio Company

Published by Sony Engineering Corporation

9-926-978-13

2002K1600-1

© 2002.11

Radio section

Frequency range

FM : 87.5 – 108MHz
AM : 531 – 1.602 kHz

Tape section

Frequency response
(Dolby NR off)

Playback: 40 – 15,000Hz

Output

Headphones (

2

 REMOTE) jack

Load impedance 8 – 300 

Ω

General

Power requirements

1.5V
Rechargeable battery
One R6 (size AA) battery

Dimensions (w/h/d)

Approx. 108.9 

×

 77.7 

×

 23.9 mm

(4

3

/

8

 

×

 3

1

/

8

 

×

 

31

/

32

inches), incl.

projecting parts and controls

Mass

Approx. 145 g (5.2 oz)
Approx. 210 g (7.5oz) incl.

rechargeable battery and a cassette

Supplied accessories

Battery case (1)
Stereo earphones (1)
Battery charge (1)
Rechargeable battery (NC-6WM, 1.2V, 600mAh,
Ni-Cb) (1)
Rechargeable battery carring case (1)
Carrying pouch (1)

Design and specifications are subject to change without notice

Ver 1.2  2002. 11

Summary of Contents for WM-FX671

Page 1: ... range FM 87 5 108MHz AM 531 1 602 kHz Tape section Frequency response Dolby NR off Playback 40 15 000Hz Output Headphones 2 REMOTE jack Load impedance 8 300 Ω General Power requirements 1 5V Rechargeable battery One R6 size AA battery Dimensions w h d Approx 108 9 77 7 23 9 mm 43 8 31 8 31 32inches incl projecting parts and controls Mass Approx 145 g 5 2 oz Approx 210 g 7 5oz incl rechargeable ba...

Page 2: ...CRITICAL TO SAFE OPERATION REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY TABLE OF CONTENTS 1 SERVICE NOTE 3 2 GENERAL 5 3 DISASSEMBLY 3 1 Case Block Assembly 6 3 2 Belt F2 7 3 3 Cassette Lid Assembly 7 3 4 Reel Ornament Assembly 8 3 5 Main Board 8 3 6 Motor F2 M901 9 3 7 Holder Assembly 9 3 8 Pinch Lever N R Assembly ...

Page 3: ...s in the center position S1 and the FWD REV switch is also in the center position When these switches are not in the center position set them to the PRE SET status as follows 2 Move the FWD REV switch S1 to the same position as the slider NR is set 3 The slider NR can be moved when the main power of the regulated power supply is turned OFF once then back ON Move the FWD REV switch S1 to the center...

Page 4: ...Gear REEL T side Gear NR FWD Left side REV Right side Idler Gear Idler Gear A S side Idler Gear A T side Insert Flywheel R Cam Gear Gear Y Insert Flywheel N Pulley Reverse Clutch Assy Motor Pulley Gear REEL T side Idler Gear A T side Insert Flywheel R Cam Gear Gear Y Gear FR FF Left side Insert Flywheel N Pulley Reverse Clutch Assy Motor Pulley Gear REEL S side Idler Gear A S side Insert Flywheel ...

Page 5: ...CATION OF CONTROLS 1 2 REMOTE jack 2 REW AMS button 3 REPEAT button 4 FF AMS button 5 OPEN knob 6 Battery case 7 Display window 8 HOLD c knob 9 SET button º MENU button BAND RADIO ON button ENTER COUNTER RESET button p RADIO OFF button VOL knob ...

Page 6: ... assembly Main board Reel ornament assembly Motor F2 M901 Holder assembly Pinch lever N R assembly Magnetic head HP901 3 1 CASE BLOCK ASSEMBLY 3 Screw M1 4 2 5 2 Two screws M1 4 2 5 1 Battery case Lid 5 Remove the case block assembly in the direction of the arrow 4 Two screws M1 4 2 5 knob HOLD Claw S2 Note When assembling the case block assembly align the knob HOLD with the position of S2 ...

Page 7: ...t F2 2 Terminal board Battery 1 Remove solder from the battery terminal board Belt F2 Belt threading 3 3 CASSETTE LID ASSEMBLY 5 Cassette lid assembly 4 Shaft 3 Open the cassette lid 1 Screw M1 4 2 0 2 Two screws M1 4 2 0 ...

Page 8: ...D SLIDER 9 Remove soldeing two points from plunger solenoid 7 Screw B1 7 3 tapping 6 Screw B1 7 3 tapping 3 Screw M1 4 8 Screw M1 4 2 Head flexible board 4 Screw M1 4 Bracket assy 0 Remove soldeing four points from motor When assembling the MAIN board align the slider with the position of S1 Note 5 Screw M1 4 1 Remove soldering from Head flexible board ...

Page 9: ...ed lock 3 7 HOLDER ASSEMBLY 4 Screw M1 4 2 Shaft 6 Shaft 1 Two screws M1 4 1 4 3 Lock lever B 0 Remove the holder assembly in the direction of the arrow 8 Remove soldering from Head flexible board 5 Lock lever S 9 Head flexible board 7 Cassette bracket assembly ...

Page 10: ...nch lever N assembly in the direction of the arrow Note Be careful of the claw 1 Remove the pinch lever R assembly in the direction of the arrow Note Be careful of the claw 3 9 MAGNETIC HEAD HP901 1 Remove the magnetic head HP901 in the direction of the arrow ...

Page 11: ...r the adjustments 4 After the adjustments apply suitable locking compound to the parts adjusted 5 The adjustments should be performed with the rated power supply voltage unless otherwise noted Torque Measurement Mode FWD FWD Back Tension REV REV Back Tension FF REW Torque Meter CQ 102C CQ 102C CQ 102RC CQ 102RC CQ 201B Meter Reading 15 to 25 g cm 0 21 to 0 34 oz inch Less than 2 0g cm Less than 0 ...

Page 12: ...Specification Value Frequency counter 18 900 19 100 Hz TUNER SECTION 0 01µF FM RF signal generator to ANT TP1 22 5kHz frequency deviation by 400Hz signal Output level as low as possible Put the lead wire antenna close to the set 30 amplitude modulation by 400Hz signal Output level as low as possible AM RF signal generator 16Ω set level meter 2 REMOTE jack J701 AM IF ADJUSTMENT Adjust for a maximum...

Page 13: ...WM FX671 SECTION 6 DIAGRAMS 13 14 15 6 1 BLOCK DIAGRAM ...

Page 14: ... 14 15 16 17 18 19 20 21 Semiconductor Location Ref No Location Ref No Location D1 A 14 D2 B 14 D3 F 14 D4 C 15 D5 B 8 D6 C 13 D101 C 9 D201 C 9 D301 C 9 D302 B 9 D303 B 9 Ref No Location D304 B 8 D305 G 9 D801 D 4 D802 E 3 D803 D 3 D804 D 3 IC1 B 14 IC2 D 14 IC3 D 17 IC4 F 18 IC5 D 18 IC6 C 19 IC301 F 17 IC302 E 9 IC601 D 19 IC801 D 3 Q1 D 16 Q2 C 16 Q3 B 13 Q4 B 14 Q5 D 15 Q6 C 15 Q7 B 13 Q8 C 1...

Page 15: ...er supply from battery terminal Voltages and waveforms are dc with respect to ground under no signal detuned conditions no mark FM AM STOP TAPE FM AM PLAY TAPE Voltages are taken with aVOM 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 Circled num...

Page 16: ...attery terminal Voltages and waveforms are dc with respect to ground under no signal detuned conditions no mark PLAY Voltages are taken with aVOM 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 Circled numbers refer to waveforms Signal path F FM E ...

Page 17: ...F V REF GND REV REC L REV REC R FWD REC R FWD REC L VCC2 MONITOR L MONITOR R N C GND MIC IN L NF L RADIO IN L MIC IN R NF R RADIO IN R MIC OUT R MIC OUT L REC IN L REC IN R N C N C REC MUTE MIC RADIO FWD REV REC PLAY CONT F CONT A FWD PLAY REV REV PLAY FWD PLAY FWD REV REV PLAY FWD PLAY REC CONT B CONT C CONT D CONT E N C N C MIC REG REF MIC REG REC BIAS REG REF REC BIAS REG OSC BASE VCC1 VCCRF AL...

Page 18: ...N C LPF EQ A PW NF A PW IN A PW IN B PW NF B 3 IN A R 5 PRE NF A 6 PRE OUT A 7 MTL DRV A 8 MTL DRV B 9 PRE OUT B 10 PRE NF B 11 AMS IN 12 IN B R 4 IN B F 2 IN A F 1 21 20 19 18 17 GND 16 AMS DET 15 AMS MIX 14 AMS SW 13 22 23 24 38 C AMP SW 37 PW SW 42 MT SW 41 F R SW 44 BST SW 43 M N SW 46 PRE GND 47 VREF IN 48 PRE SW 45 AMS OUT 40 BEEP 39 26 27 28 29 30 31 32 33 34 DET 36 AGC IN 35 EQ B 25 RIPPLE...

Page 19: ... key is pressed during HOLD H AD Vref Tape end Locking detect input terminal Tape sound existing or not exiting detect L Music exists H Music does not exist Terminal for controlling the rotation detect circuit Rotation detect input DDC control terminal H DDC ON HOLD detect input L HOLD ON Voltage detect input KEY input terminal TAPE rotating direction detect terminal AD IN 1 2 3 reference viltage ...

Page 20: ...itivity select terminal H LOCAL L DX Phase comparator output External interrupt terminal Interrupt by key input FM MONO STEREO select terminal H MONO L ST Power supply Ground terminal FM local oscillator input AM local oscillator input Power supply voltage RESET terminal H during operation Terminal to which external oscillator is connected Terminal to which external capacitor is connected to stabi...

Page 21: ... KNOB OPEN 6 3 029 220 01 SPRING TENSION 7 3 029 213 01 TERMINAL BOARD 8 3 345 648 71 SCREW M1 4 TOOTHED LOCK 9 3 893 942 11 SCREW 1 7 3 TAPPING B 10 A 3021 222 A MAIN BOARD COMPLETE US AEP CET 10 A 3021 223 A MAIN BOARD COMPLETE FR 11 3 029 210 01 TERMINAL BOARD MINUS 12 3 366 892 01 SCREW M1 4 13 3 328 483 21 SHEET 14 X 3376 277 2 BRACKET ASSY 15 3 029 205 11 COVER MD 16 3 029 217 01 LEVER B LOC...

Page 22: ...LYWHEEL R INSERT 66 3 007 428 01 WASHER R 67 3 029 765 01 SCREW M1 4 TOOTHED LOCK 68 3 029 274 01 RETAINER F2 MOTOR 69 3 007 433 01 SHEET N REFLECTION 70 X 3377 037 1 CHASSIS ASSY F M 71 3 010 274 02 TABLE REEL 72 3 010 954 01 SPRING BT COMPRESSION 73 3 029 282 01 GEAR Y 74 3 029 285 01 GEAR CAM 75 3 029 284 01 LEVER TRIGGER 76 3 029 281 01 GEAR IDLER B 77 3 010 273 02 GEAR REEL 78 3 029 273 01 GE...

Page 23: ...CERAMIC CHIP 330PF 10 50V C31 1 164 362 11 CERAMIC CHIP 470PF 5 50V C32 1 125 984 21 TANTAL CHIP 22uF 20 4V C33 1 115 156 11 CERAMIC CHIP 1uF 10V C34 1 115 156 11 CERAMIC CHIP 1uF 10V C35 1 162 970 11 CERAMIC CHIP 0 01uF 10 25V C36 1 115 156 11 CERAMIC CHIP 1uF 10V C37 1 164 227 11 CERAMIC CHIP 0 022uF 10 25V C38 1 107 826 91 CERAMIC CHIP 0 1uF 10 16V C39 1 115 412 11 CERAMIC CHIP 680PF 5 25V C40 ...

Page 24: ... FILTER CERAMIC AM 450kHz DIODE D1 8 719 053 30 DIODE MA2S357 TX SO D2 8 719 053 30 DIODE MA2S357 TX SO D3 8 719 072 58 DIODE SVC347 TL D4 8 719 404 50 DIODE MA111 TX D5 8 719 049 09 DIODE 1SS367 T3SONY D6 8 719 422 37 DIODE MA8051 D101 8 719 422 37 DIODE MA8051 D201 8 719 422 37 DIODE MA8051 D301 8 719 422 37 DIODE MA8051 D302 8 719 422 37 DIODE MA8051 D303 8 719 422 37 DIODE MA8051 D304 8 719 42...

Page 25: ...HIP 1K 5 1 16W R25 1 216 845 11 METAL CHIP 100K 5 1 16W R26 1 216 833 91 RES CHIP 10K 5 1 16W R27 1 216 853 11 METAL CHIP 470K 5 1 16W R28 1 216 845 11 METAL CHIP 100K 5 1 16W R29 1 216 839 11 METAL CHIP 33K 5 1 16W R30 1 216 833 91 RES CHIP 10K 5 1 16W R31 1 216 843 11 METAL CHIP 68K 5 1 16W R32 1 216 825 11 METAL CHIP 2 2K 5 1 16W R33 1 216 825 11 METAL CHIP 2 2K 5 1 16W R34 1 216 857 11 METAL C...

Page 26: ...16W R805 1 216 819 11 METAL CHIP 680 5 1 16W R806 1 216 819 11 METAL CHIP 680 5 1 16W R807 1 216 845 11 METAL CHIP 100K 5 1 16W RESISTOR COMPOSITION CIRCUIT BLOCK RB1 1 233 811 21 RES NETWORK 470K 3216 RB601 1 233 873 21 RES NETWORK CHIP TYPE 3216 VARIABLE RESISTOR RV1 1 223 587 11 RES ADJ CARBON 22K RV301 1 225 684 21 RES VAR CARBON 30K 30K VOL RV601 1 223 584 11 RES ADJ CARBON 2 2K SWITCH S1 1 7...

Page 27: ...MEMO ...

Page 28: ...evised 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 1993 03 New 1 1 2002 01 Correction of Part No for IC4 SPM 01041 1 2 2002 11 Correction of Ref No 21 SPM 02052 ...

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