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Sony Walkman WM-EX621, Service Manual

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Sony Walkman WM-EX621 Service Manual Download Page 11

WM-EX621

11

3-8. LEVER (N)/(R) ASSY, PINCH

3-9. HEAD, MAGNETIC (HP901)

1

 Claw

2

 Remove the pinch lever (R)

     assembly in the direction of
     the arrow.

4

 Remove the pinch lever (N)

     assembly in the direction of
     the arrow.

Holder (FS) assy.

3

 Claw

1

 Two claws

2

 Remove the magnetic head.

     (HP901)

Holder (FS) assy

Summary of Contents for Walkman WM-EX621

Page 1: ...on Personal Audio Company Published by Sony Engineering Corporation 9 873 318 01 2001J1600 1 2001 10 Frequency response Playback 30 18 000 Hz Output Headphones i jack Load impedance 8 300 Ω Power requirements 1 5 V Rechargeable battery One R6 size AA battery Dimensions w h d Approx 77 1 108 0 20 5 mm Mass Approx 158 g Supplied accessories Battery case 1 Stereo headphones or earphones with remote c...

Page 2: ...tip is applied for too long so be careful Strong viscosity Unleaded solder is more viscous sticky less prone to flow than ordinary solder so use caution not to let solder bridges occur such as on IC pins etc Usable with ordinary solder It is best to use only unleaded solder but unleaded solder may also be added to ordinary solder SAFETY RELATED COMPONENT WARNING COMPONENTS IDENTIFIED BY MARK OR DO...

Page 3: ...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 S701 to the center position in synchronism with the timing when the slider NR is moved 3 FF REW modes 1 Check that the PRE SET status is set 2 Connect square wave or sine wave to TP53 P IN and TP14 GND See illustration below 3 Press the x switc...

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

Page 5: ...manual C A REV FWD B UK Australian and Hong Kong model Other models There is a tactile dot beside VOL on the main unit to show the direction to turn up the volume The button has a tactile dot Plug in firmly VOL REW HOLD FF Swing lever x HOLD VOL Y REPEAT OPEN SOUND MODE Y x ...

Page 6: ...t at the point you want On the main unit Move and hold the swing lever toward FF CUE REVIEW REW during playback and release it at the point you want Using Other Functions Adjusting Playback Mode You can adjust the playback direction mode s or d as well as the BL SKIP mode on or off 1Press MODE repeatedly With each press the indications change as follows s v s BL SKIP v d v d BL SKIP When BL SKIP i...

Page 7: ...1 Lid battery case 2 Screw M1 4 2 5 3 Two screws M1 4 2 5 4 Two screws M1 4 2 5 5 Remove the case sub assy in the direction of the arrow Claw S707 Knob HOLD Note When assembling the case sub assy align the Knob HOLD with the position of S707 Case sub assy Lid assy cassette Ornament reel Belt F4 Holder FS assy MAIN board Head magnetic HP901 Lever N R assy pinch Motor Capstan Reel M901 Set ...

Page 8: ...lunger solenoid 2 Remove soldering six points from the head flexible boards 8 MAIN board Note Be careful of the claw 7 Screw M1 4 Claw Head flexible board 1 Shielded sheet 3 Remove soldering four points from the leaf switch S701 6 Two screws M1 4 3 Belt F4 Motor Pulley Insert Flywheel R Insert Frywheel N Pulley Reverse 2 Terminal board Battery 1Remove soldering from the battery terminal board Belt...

Page 9: ...WM EX621 9 3 4 MOTOR CAPSTAN REEL M901 3 5 LID ASSY CASSETTE 2 Motor Capstan Reel M901 1 Two screws M1 4 2 Two screws M1 4 2 0 2 Screw P1 4 2 0 4 Lid assy cassette 1 Open the cassette lid 3 Shaft ...

Page 10: ... claws 1 Two claws 3 Boss 5 Ornament reel 9 Remove soldering from six head flexible boards 0 Remove the holder FS assy in the direction of the arrow 8 Shielded sheet 1 Two screws M1 4 1 4 3 Lock Lever B 2 Shaft 7 Bracket cassette assy 6 Shaft 4 Screw M1 4 5 Shaft ...

Page 11: ... HEAD MAGNETIC HP901 1 Claw 2 Remove the pinch lever R assembly in the direction of the arrow 4 Remove the pinch lever N assembly in the direction of the arrow Holder FS assy 3 Claw 1 Two claws 2 Remove the magnetic head HP901 Holder FS assy ...

Page 12: ...ead with a head demagnetizer 3 Do not use a magnetized screwdriver for the adjustments 4 The adjustments should be performed with the rated power supply voltage unless otherwise noted Torque Measurement Mode FWD FWD Back Tension REW REW Back Tension FF REW Torque Meter CQ 102D CQ 102D CQ 102C CQ 102C CQ 201B Meter Reading 14 7 to 24 5 mN m 15 to 25 g cm 0 22 to 0 34 oz inch 0 294 to 1 96 mN m 0 3 ...

Page 13: ...OL SWITCH TH601 TAPE SPEED RV601 START VREF IN COMPARATOR VSP OUT VCC DATA REMOTE GND BATT B BATT B BASE PW OUT L PW OUT R PW OUT C POWER AMP POWER AMP POWER AMP PW NF L BASS BOOST AMP PW IN L PW IN C BST OUT VOL RV301 HOLD S707 2 J301 S901 2 ATS PRE OUT L MTL DRV L FWD IN L REV IN L L CH R CH FWD L CH R CH REV R CH R CH R CH R CH R CH R CH R CH R CH S701 DIRECTION OSC MOTOR RESTART MOTOR DIR AMS ...

Page 14: ...ariations may be noted due to normal produc tion tolerances Signal path E PB Abbreviation FR French model 6 3 IC BLOCK DIAGRAMS PRE A PRE B MIX PW B PW A PW C BST MT TC BASE RF IN PW GND OUT B OUT C OUT A VCC RF OUT VREF OUT BST NF BST OUT PW IN 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 ...

Page 15: ...15 15 WM EX621 6 4 SCHEMATIC DIAGRAM MAIN BOARD IC B D IC B D 1 3 Vp p 30 5 µsec 2 8 Vp p 11 µsec S901 1 DETECT S901 2 ATS ...

Page 16: ...50 R250 EXCEPT FR Semiconductor Location Ref No Location Ref No Location Ref No Location Ref No Location D701 B 9 D702 E 2 D709 B 8 D710 B 6 D711 C 9 IC301 D 6 IC601 D 12 IC701 C 4 IC702 E 3 IC703 C 4 IC704 E 11 Q301 D 6 Q302 C 8 Q303 C 8 Q304 C 5 Q306 B 8 Q603 C 2 Q604 D 1 Q701 C 3 Q702 C 2 Uses unleaded solder ...

Page 17: ... terminal when the machine is stopped A D input Battery voltage detection input terminal A D input Key input terminal A D input Plunger drive signal output L plunger ON Control signal output to the rotation detection circuit of the capstan reel motor L rotation detection circuit ON LED drive signal output to BATT display L LED ON empty terminal Dolby ON OFF control signal output to Dolby NR amplif...

Page 18: ...d in this machine empty terminal Motor speed control signal output to capstan reel motor drive IC IC601 L normal H half speed Motor start control signal output to capstan reel motor drive IC IC601 H motor ON Motor direction control signal output to capstan reel motor drive IC IC601 L clockwise H counter clockwise Audio attenuation ON OFF control signal output to TA2123AF IC301 L OFF H ON CUE REVIE...

Page 19: ...2 3 233 763 11 CASE BLUE 2 3 233 763 21 CASE ORANGE 3 3 225 996 11 SCREW M1 4 EG PRECISION PAN 4 3 233 978 01 PLATE ORNAMENTAL 5 3 233 976 01 BUTTON REW FF 6 3 233 979 01 SPRING CLICK 7 3 234 098 01 BASE SILVER 7 3 234 098 11 BASE BLUE 7 3 234 098 21 BASE ORANGE 8 3 233 977 01 SHEET BUTTON ADHESIVE 9 3 233 975 01 BUTTON PLAY 10 3 234 092 01 BUTTON STOP 11 3 233 980 01 LID BATTERY CASE SILVER 11 3 ...

Page 20: ... 3 309 595 11 SHEET INSULATING PACK 60 3 939 590 05 SCREW IB LOCK 61 3 038 054 01 LEVER B LOCK 62 3 389 523 02 SCREW IB LOCK 63 3 223 827 31 ORNAMENT REEL SILVER 63 3 223 827 41 ORNAMENT REEL BLUE 63 3 223 827 51 ORNAMENT REEL ORANGE 64 3 029 220 11 SPRING TENSION 65 3 222 732 21 KNOB OPEN SILVER 65 3 222 732 31 KNOB OPEN BLUE 65 3 222 732 41 KNOB OPEN ORANGE 66 X 3377 717 1 BRACKET ASSY 67 3 345 ...

Page 21: ...No Description Remarks Ref No Part No Description Remarks 902 910 911 912 913 909 907 918 901 903 904 905 906 919 908 915 916 917 914 HP901 M901 920 911 3 029 306 11 FLYWHEEL N INSERT 912 3 220 035 01 BELT F4 913 3 029 282 01 GEAR Y 914 3 932 724 21 WASHER 915 X 3376 813 1 CLUTCH ASSY FM 916 3 029 765 01 SCREW M1 4 TOOTHED LOCK 917 3 029 274 01 RETAINER F2 MOTOR 918 X 3377 362 1 LEVER N ASSY PINCH...

Page 22: ...ORSION 957 3 029 285 12 GEAR CAM 958 3 029 284 01 LEVER TRIGGER 959 3 029 281 01 GEAR IDLER B 960 3 029 283 01 GEAR IDLER A 7 4 MECHANISM BLOCK 2 Ref No Part No Description Remarks Ref No Part No Description Remarks 961 3 029 286 01 GEAR NR 962 3 029 273 01 GEAR FR 963 3 007 433 01 SHEET N REFLECTION PM901 1 454 674 31 SOLENOID PLUNGER PM901 951 952 954 953 963 962 961 959 956 955 954 958 957 960 ...

Page 23: ...0 2V C306 1 109 935 11 TANTAL CHIP 4 7uF 20 00 4V C307 1 115 467 11 CERAMIC CHIP 0 22uF 10 00 10V C308 1 165 112 11 CERAMIC CHIP 0 33uF 16V C309 1 115 467 11 CERAMIC CHIP 0 22uF 10 00 10V C310 1 135 149 11 TANTALUM CHIP 2 2uF 20 10V C311 1 164 156 11 CERAMIC CHIP 0 1uF 25V C312 1 115 156 11 CERAMIC CHIP 1uF 10V C313 1 109 935 11 TANTAL CHIP 4 7uF 20 00 4V C314 1 135 187 21 TANTAL CHIP 2 2uF 20 00 ...

Page 24: ... 1 16W R214 1 216 853 11 METAL CHIP 470K 5 1 16W R215 1 216 815 11 METAL CHIP 330 5 1 16W R250 1 216 811 11 METAL CHIP 150 5 1 16W FR R302 1 216 849 11 METAL CHIP 220K 5 1 16W R303 1 216 833 11 METAL CHIP 10K 5 1 16W R304 1 216 835 11 METAL CHIP 15K 5 1 16W R305 1 216 837 11 METAL CHIP 22K 5 1 16W R306 1 216 793 11 RES CHIP 4 7 5 1 16W R307 1 216 825 11 METAL CHIP 2 2K 5 1 16W R308 1 216 851 11 ME...

Page 25: ...R BC 7DN CH 0 1 756 115 11 CHARGER BATTERY BC 7SP2 HK UK 1 528 299 41 BATTERY NI CD NC 6WM AEP EE FR UK 1 528 543 11 BATTERY NI CD NC 6WM CH HK KR 1 528 543 22 BATTERY NI CD NC 6WM JEW 3 008 521 01 CASE BATTERY CHARGE 1 759 700 21 CASE BATTERY 8 954 008 91 RECEIVER EAR MDR E808SP A 3052 265 A REMOTE CONTROL ASSY RM WME23 3 220 749 01 CASE CARRYING 0 1 569 007 11 ADAPTOR CONVERSION 2P JEW 3 021 018...

Page 26: ...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 10 New ...

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