SERVICE MANUAL - Electronica.ro
Contents
1. 445 MOTOR CTL TOTAL CURRENT PLAY 65mA 446 MOTOR BIR FF 200mA 280mA E REW 150mA 240mA MOTOR BRK F 5 BATTERY CASE o P ME MOTOR RESTART gt B 5 F E p S 0302 F ORONG 0 A EU 11 usec eR ne ar SWITCHING AEP UK EE FR IEC AEE ONA N R NO MOUNT 220 1P 1 5V R250 nah G 1C702 E zu G BC BC EE East European CONVERTER xc6371 L T BATTERY PACK 5701 BIRECTION H n REV lt STOP FWD H 1P 1 2V 600mAh I MOTOR RESTART 0603 0604 UN5215 cd 5 SED CONTROL RAS SIT 9 SWITCH v b RV601 TP21 M Sanco QTP22 U SWITCH 0601 0602 1 0602 2 alee ns MOTOR BRAKE 01 dioi I C601 lt gir m Lies SWITCH 1 5 En AUBIO BASE 25B815B7 MASTER AMP XN1401 XN4601 RIPPLE CAPSTAN REEL 1C301 FILTER J J BER 2125 1601 1279 Note on Schematic Diagram 2 oc e All capacitors are in uF unless otherwise noted pF uuF K 8 K 50 WV or less are not indicated except for electrolytics FE OE and tantalums MOTOR _ g 96 indicates tolerance VCC2. BIAS CIRCUIT PREOUTB S PRENF B AMSIN MTL DRV A MTL DRV B IC601 MM1279XVBE WM EX678 BASE RF OUT GND AMS DET AMS MIX AMS SW MOTIVE CONTROL CIRCUIT BIAS REFERENCE VOLTAGE 15 WM EX678 6 4 SCHEMATIC DIAGRAM 1 2 3 4 D 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 A MAIN BOARD R714 33 X701 C70 1 704 32 768KHz RESET 10p REGULATOR SIGNAL 1 704 4 17 GENERATOR m MA8062 3 2 8711 o 11 BATA ie 8062 o TPI2 REMO J301 C C708 G7 IN PHOTO R720 TP8 COM 701 0 5 cat 6323 FBI01 TPQ Lch ROTATION 701 10000 980 R150 Ron VAT BETECT LOL FB201 PM901 0702 0 5 0 5 FF giy PLAY PLUNGER Del AN AN AN 1 5k 2 3 1 6 REFLECTOR 1 3 40 LEB AVLS R734 R735 R736 L w 4 p PHOTO SWITCH amp ee d n EE 5707 Le pt D PRO 20214 lt 4T LEB BLSKIP 30 5 usec AW AW HOLD m D 202 1 7 1 701 06880150 N 2 LED MB LED 1 26RV 5702 EN 9704 5705 5703 1 A A n SYSTEM CONTROLLER REw AMS T LEB REVIVE 1 8 2 20 wl 44 SPEED CTL 4 1 1 CHASSIS E
3. 9 25 CASSETTE LID ASSEMBLY an uuu u u SS 9 3 6 REEL ORNAMENT ASSEMBLY 10 a T HOLDER ASSEMBLY ne in 10 3 8 PINCH LEVER N R ASSEMBLY 11 3 9 MAGNETIC HEAD 0 11 4 MECHANICAL ADJUSTMENT 12 5 ELECTRICAL ADJUSTMENT 15 6 DIAGRAMS 6 1 BLOCK DIAGRAM in 13 6 2 IC BLOCK DIAGRAMS 15 6 3 PRINTED WIRING BOARD 16 6 4 SCHEMATAC DIAGRAM mm 19 6 5 TC PIN FUNCTION ag ajan aa pen aa aaa bend de de kaa kahana 92 7 EXPLODED VIEWS 7 1 CABINET BLOCK MAIN BOARD 24 7 2 MECHANISM DECK BLOCK ss 25 8 ELECTRICAL PARTS 26 Notes on chip component replacement e Never reuse a disconnected chip component Notice that the minus side of a tantalum capacitor may be damaged by heat Flexible Circuit Board Repairing Keep the temperature of 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 SAFETY RELATED COMPONENT WARNING COMPONENTS IDENTIFIED BY MARK A OR DOTTED LINE WITH MARK ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS
4. C706 C707 C708 C709 C710 C711 C712 CB301 CB303 D701 D702 D703 D709 D710 D711 FB101 FB201 C301 C302 C601 C701 702 703 704 96 Part No 115 412 11 125 837 91 107 826 91 115 467 11 164 156 11 107 826 91 162 970 11 162 970 11 162 970 11 135 151 21 cl 119 750 11 104 851 11 162 915 11 107 826 91 115 156 11 cl 115 156 11 115 1561 115 156 11 115 156 11 115 156 11 115 156 11 115 1561 1 127 575 21 1 127 576 21 8 719 404 50 8 719 072 70 8 719 067 79 8 719 068 83 8 719 422 58 8 719 422 58 1 469 125 21 1 469 125 21 8 759 549 78 8 759 488 80 8 759 356 46 8 759 580 19 8 759 566 77 8 759 430 08 8 759 280 84 SEMICONDUCTORS In each case u for example uA HA UPA UPA uPB uPC uPC uPD uPD When indicating parts by reference number please include the board name The components identified by mark A or dotted line with mark are critical for safety Replace only with part number specified Description CERAMIC CHIP 680PF 5 CERAMIC CHIP 1uF 10 CERAMIC CHIP 0 1uF 10 CERAMIC CHIP 0 22 10 CERAMIC CHIP 0 1uF CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP 0 01uF CERAMIC CHIP 0 01uF TANTALUM CHIP 4 7uF 0 1uF 0 01uF 10 10 10 10 20 T
5. MOTOR 48 RESTART Description AMS detection signal input from TA2123F IC301 No music Drive signal output for AVLS display Not used in this machine empty terminal Drive signal output for BL SKIP display Not used in this machine empty terminal Drive signal output for MG GRV display Not used in this machine empty terminal Drive signal output for RV GRV display Not used 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 motor ON Motor direction control signal output to capstan reel motor drive IC IC601 L clockwise H counter clockwise Motor brake ON OFF control signal output to capstan reel motor drive IC IC601 H brake ON Normally L is input Signal output for motor start up status control to capstan reel motor drive IC IC601 during FF REW motor rotating NOTE 7 1 CABINET BLOCK MAIN BOARD XX X mean standardized parts so they may have some differences from the original one Items marked are not stocked since they are seldom required for routine service Some delay should be anticipated when ordering these items Color Indication of Appearance Parts Example KNOB BALANCE bas n Parts of Color Cabinet s Color SECTION 7 EXPLODED VIEWS The mechanical parts wi
6. SWITCH LEAF 7 2 MECHANISM DECK BLOCK MT WMEX672 162 Ref No 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 Part No X 3377 039 1 X 3376 295 1 3 029 271 01 X 3376 294 1 3 029 275 01 3 029 278 01 3 029 276 01 3 029 289 01 X 3376 813 1 3 932 724 21 3 029 287 01 3 386 694 01 3 029 306 11 3 029 280 01 3 029 268 11 3 007 428 01 3 029 765 01 Description HOLDER ASSY M PINCH LEVER R ASSY SPRING HD PINCH LEVER N ASSY WASHER STOPPER N WASHER WASHER STOPPER R WASHER CLUTCH ASSY F WASHER SPRING TG TORSION WASHER FLYWHEEL N INSERT BELT F2 FLYWHEEL R INSERT WASHER R SCREW M1 4 TOOTHED LOCK Remarks 68 69 70 71 72 73 74 19 76 77 78 79 80 81 HP901 M901 PM901 95 Ref No Part No 3 029 274 01 3 007 433 01 X 3377 037 1 3 010 274 02 3 010 954 01 3 029 282 01 3 029 285 01 3 029 284 01 3 029 281 01 3 010 273 02 3 029 273 01 3 029 283 01 3 029 286 01 3 029 288 01 1 500 576 11 1 763 166 11 1 454 674 32 M901 Description Remarks RETAINER F2 MOTOR SHEET N REFLECTION CHASSIS ASSY F M TABLE REEL SPRING BT COMPRESSION GEAR Y GEAR CAM LEVER TRIGGER GEAR IDLER B GEAR REEL GEAR FR GEAR IDLER A GEAR NR PULLEY REVERSE HEAD MAGNETIC PLAYBACK MOTOR CAPSTAN REEL WITH PULLEY SOLENOID PLUNGER NOTE e Due
7. es 5 5 5 c o c a yy BATT DDC X701 B B 32 768kHz RV601 TAPE SPEED Q603 SPEED 77 77 CONTROL SWITCH COMPARATOR THP601 RESET SIGNAL GENERATOR C703 M901 CAPSTAN REEL SWITCH amp BIAS DDC B LOGIC REFERENCE 8 X CIRCUIT VOLTAGE UD REGULATOR D703 ROTATION DETECT 10704 SENSOR E LED BATT ea W DIRECTION CONTROL CAPSTAN REEL DC DC 9 ome D MOTOR DRIVE DDC B CONVERTER 601 C702 PHOTO REFLECTOR BB BATT IN PHOTO 37 SWITCH amp BUFFER am 2 MOTOR MOTOR BRAKE SWITCH CONTROL SWITCH PHOTO CTL 18 0602 2 0601 602 1 1 CONTROL SWITCH PLUNGER PM901 PM CTL 17 DRIVE 1 PLUNGER 16 777 e SIGNAL PATH gt gt PLAYBACK R CH Same as L CH DRY BATTERY SIZE AA IEC DESIGNATION R6 1P 1 5V BATTERY NC 6WM 1 2V 6 2 IC BLOCK DIAGRAMS IC301 TA2123F EL DET AGC IN BST NF 8 BST OUT PW IN C LPF 5 PWNFA 8 EQA 5 SW MT TC BEEP AMS OUT MT SW PW SW BST SW F R SW PRE SW M N SW PRE GND VREF IN Fo IN ad PRE OUT 6 IC302 NJM2185AV TE2
8. 1 16W FR 1 16W 1 16W FR 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W Ref No R211 R212 R212 R213 R250 R301 R302 R303 R304 R305 R306 R307 R308 R309 R601 R602 R603 R604 R701 R702 R703 R704 R705 R706 R707 R708 R709 R710 R711 R712 R713 R714 R715 R717 R718 R719 R720 R721 R722 R723 R724 R726 R731 R732 R733 R734 R735 R736 R738 R739 RB601 RB602 Part No lI I lI 1 1 216 827 11 216 809 11 216 825 11 216 853 11 216 813 11 218 887 11 216 849 11 216 833 11 216 835 11 216 837 11 216 793 11 216 825 11 216 851 11 218 899 11 216 837 11 216 809 11 216 829 11 216 823 11 216 823 11 216 855 11 216 853 11 218 911 11 218 911 11 218 911 11 218 915 11 218 903 11 218 895 11 216 853 11 216 853 11 216 853 11 216 841 11 216 803 11 216 827 11 216 821 11 216 821 11 216 809 11 218 871 11 218 839 11 218 855 11 218 851 11 218 875 11 216 821 11 216 833 11 216 847 11 218 895 11 218 851 11 218 871 11 218 867 11 218 895 11 218 911 11 234 243 21 234 200 21 Description METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP RES CHIP METAL
9. 825 11 216 837 11 216 789 11 216 821 11 216 837 11 216 827 11 216 809 11 216 825 11 216 853 11 216 813 11 216 849 11 216 839 11 216 811 11 216 831 11 216 823 11 Il 216 825 11 216 837 11 216 789 11 216 821 11 216 837 11 o Description lt JACK gt JACK REMOTE lt JUMPER CHIP gt METAL CHIP 0 METAL CHIP 0 lt COIL gt INDUCTOR CHIP 100uH lt PHOTO INTERUPTER gt PHOTO PR 20 T lt TRANSISTOR gt TRANSISTOR 2SB815B7 TB TRANSISTOR XN1116 TRANSISTOR XN1116 TRANSISTOR XN1216 TRANSISTOR XN4315 TRANSISTOR XN1401 TRANSISTOR XN4601 TRANSISTOR UN5215 TRANSISTOR UN5215 TRANSISTOR 25 1362 0 TRANSISTOR UN5215 lt RESISTOR gt METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP 220K 33K 150 6 8K 1 5K METAL CHIP 2 2K METAL CHIP 22K METAL CHIP 2 2 METAL CHIP 1K METAL CHIP 22K METAL CHIP 3 3K METAL CHIP 100 METAL CHIP 2 2K METAL CHIP 470K METAL CHIP 220 METAL CHIP 220K METAL CHIP 33K METAL CHIP 150 METAL CHIP 6 8K METAL CHIP LSR METAL CHIP 2 2K METAL CHIP 22K METAL CHIP 2 2 METAL CHIP 1K METAL CHIP 22K 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 Remarks 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W AEP UK EE
10. CHIP METAL CHIP METAL CHIP METAL CHIP RES CHIP METAL CHIP METAL CHIP RES CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP RES CHIP RES CHIP RES CHIP RES CHIP RES CHIP RES CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP RES CHIP RES CHIP RES CHIP RES CHIP RES CHIP METAL CHIP METAL CHIP METAL CHIP RES CHIP RES CHIP RES CHIP RES CHIP RES CHIP RES CHIP lt CONPOSITION CIRCUIT BLOCK gt RES NETWORK 220K 3216 RES NETWORK 100 3216 3 3K 100 470K 220 47K 220K 10K 15K 22K 4 7 2 2K 330K 150K 22K 100 4 7K 1 0K 680 470 470 470 470 680 220 100 470 470 470 47K 33 3 3K 1K 1K 100 10K 470 2 2K 1 5K 15K 1K 10K 150K 100K 1 5K 10K 6 8K 100K 470K 5 5 5 5 5 0 50 5 5 5 5 5 5 5 0 50 5 5 5 5 5 5 5 0 50 0 50 0 50 0 50 0 50 0 50 5 5 5 5 5 5 5 5 5 0 50 0 50 0 50 0 50 0 50 5 5 5 0 50 0 50 0 50 0 50 0 50 0 50 Remarks 1 16W 1 16W AEP UK EE 1 16W FR 1 16W 1 16W FR 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16
11. e ___ panel designation dm NJM2185AV E L le L Note The components identified by mark or dotted line with mark A are critical for safety dE Replace only with part number specified TAPE BETECD NE V ANNE B Line M F M LT adjustment for repair 5901 2 po edt Power voltage is dc 1 5V and fed with regulated dc power 1971 supply from battery terminal u Y TP REV L o i ee To nares no mark PB Fwa Waveforms are taken with a oscilloscope N 2 ES Lu N Voltage variations may be noted due to normal produc 16 TRECE M NCC XXXI CC un ANE s ee tion tolerances Signal path PB gt Abbreviation FR French EE EastEuropean 19 20 1 WM EX678 6 5 IC PIN FUNCTION MAIN BOARD 1C701 ML63512 119TBZ060 SYSTEM CONTROL 1 D un ON I 10 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 Dolby ON OFF control signal output to Dolby NR amplifier IC302 CTL DOLBY L Dolby NR ON H Dolby NR OFF FWD SW Detection switch S701 input terminal FWD CENTER SW Detection switch S701 input terminal L CENTER REV SW Detection switch S701 input terminal L REV Cassette detection switch S901 1 input terminal ASSETTE SW I L with cassette without cassette Serial data output of communication with the remote co
12. terminal Power supply terminal for external interface 42 5 V ws ma serwpwersspytmiafrbeke _ Terminal to which condenser for step up power supply is connected TAT2B Test input terminal Normally fixed to H OSCM EUN Terminal to which external capacitor for oscillation is connected Not used in this machine empty terminal Terminal to which resistance for high speed CR oscillation 800 KHz is connected Not used in this machine Terminal to which condenser for step up power supply is connected Power supply terminal for internal logic Terminal to which main system clock is connected 32 768 kHz NN NN EN Terminal to which main system clock is connected 32 768 kHz Test input terminal Normally fixed to H OSCO I empty terminal Terminal to which resistance for high speed CR oscillation 800 KHz is connected Not used in this machine OSCI RESET I 0 o L is input for several hundreds msec after power supply starts up then H is input BEEP O Beep sound output to TA2123F IC301 IN PHOTO Rotation detection input of capstan reel motor M901 AVLSCTL O AVLD ON OFF control signal output L AVLS OFF H AVLS ON empty terminal System reset signal input from the reset signal generator IC703 L reset Pinto Pin Name 1O O Cu homse 0 amp upw o ep revive o
13. the leaf switch Remove soldering two points j S701 from plunger solenoid A Two screws Q Remove soldering six points M1 4 from the head flexible boards N AN MAIN board WA Note Be careful of the claw T S Screw M1 4 Head flexible board N Remove soldering four points from motor SLIDER Note When assembling the MAIN board align the slider with the position of S701 3 3 BELT F2 Belt F2 Terminal board Battery Remove soldering from the battery terminal board 3 4 MOTOR F2 M901 Two screws M1 4 Motor F2 M901 T 3 5 CASSETTE LID ASSEMBLY Q Screw M1 4 x 2 Q Cassette Lid Assembly Two screws M1 4 x 2 Shaft 3 6 REEL ORNAMENT ASSEMBLY Reel Ornamene Assembly Claw Note Remove the assembly while removing the 5 claws and the boss carefully 3 7 HOLDER ASSEMBLY Shaft Cassette Bracket Assembly Lock Lever 5 S Screw Toothed Lock M1 4 5 Lock Lever Q Two screws 6 1 4 1 4 Remove the holder assembly in the direction of the arrow Remove soldering from six head flexible boards 3 8 PINCH LEVER N R ASSEMBLY Claw Q Remove the pinch lever R assembly in the direction of the arrow Note Be careful of the claw Remove the pinch lever assembly in the direction of the
14. to standardization replacements in the parts list may be different from the parts specified in the diagrams or the components used on the set X mean standardized parts so they may have some difference from the original one tems marked are not stocked since they are seldom required for routine service Some delay should be anticipated when ordering these items SECTION 8 ELECTRICAL PARTS LIST CAPACITORS uF uF RESISTORS All resistors are in ohms METAL metal film resistor METAL OXIDE Metal Oxide film resistor F nonflammable COILS uH uH Abbreviation FR French EE Remarks MAIN BOARD COMPLETE AEP UK EE MAIN BOARD COMPLETE FR East European 33uF 0 47uF 0 22uF 2 2uF 0 022uF 0 033uF Sour 0 47 0 22uF 2 2uF 0 022uF 0 033uF 47uF 0 1uF 4 7uF 330uF 4 7uF 0 22 0 33uF 0 22uF 2 2uF 0 1uF 1uF 4 7uF 2 2uF 2 2uF 1uF 0 001uF 10uF 0 1uF 0 0047uF 1000PF Ref No Part No Description A 3021 172 A ok ok ok ok ok ok ok ok ok ok OK OK ok ok Ok OK ok ok K K A 3021 173 A oh ok ok ok ok ok ok ok ok ok OK OK ok ok KK ok K K K OK lt CAPACITOR gt C101 1 107 520 11 TANTAL CHIP C102 1 115 156 11 CERAMIC CHIP C103 1 115 156 11 CERAMIC CHIP C104 1 115 156 11 CERAMIC CHIP C105 1 113 619 11 CERAMIC CHIP C106 1 115 467 11 CERAMIC CHIP C107 1 164 505 11 CERAMIC CHIP C108 1 164 227 11 CERAMIC CHIP C109 1
15. 164 677 11 CERAMIC CHIP C201 1 107 520 11 TANTAL CHIP C202 1 115 156 11 CERAMIC CHIP C203 1 115 156 11 CERAMIC CHIP C204 1 115 156 11 CERAMIC CHIP C205 1 113 619 11 CERAMIC CHIP C206 1 115 467 11 CERAMIC CHIP C207 1 164 505 11 CERAMIC CHIP C208 1 164 227 11 CERAMIC CHIP C209 1 164 677 11 CERAMIC CHIP C301 1 119 663 11 TANTAL CHIP C302 1 164 156 11 CERAMIC CHIP C303 1 117 181 11 TANTAL CHIP C304 1 115 156 11 CERAMIC CHIP C305 1 126 236 11 ELECT C306 1 109 935 11 TANTAL CHIP C307 1 115 467 11 CERAMIC CHIP C308 1 165 112 11 CERAMIC CHIP C309 1 115 467 11 CERAMIC CHIP C310 1 135 149 21 TANTALUM CHIP C311 1 164 156 11 CERAMIC CHIP C312 1 115 156 11 CERAMIC CHIP C313 1 109 935 11 TANTAL CHIP C314 1 135 187 21 TANTAL CHIP C315 1 135 187 21 TANTAL CHIP C316 1 125 837 91 CERAMIC CHIP 317 1 162 964 11 CERAMIC CHIP C318 1 135 201 11 TANTALUM CHIP C319 1 164 156 11 CERAMIC CHIP C320 1 162 968 11 CERAMIC CHIP C321 1 115 416 11 CERAMIC CHIP C322 1 109 937 11 TANTAL CHIP 6 8uF 20 10 10 10 10 20 10 10 10 10 20 20 20 20 10 10 20 20 20 20 10 10 20 10 5 20 2 5V 10V 10V 10V 6 3V 10V 16V 25V 16V 2 5V 10V 10V 10V 6 3V 10V 16V 25V 16V 2 5V 25V 2 5V 10V 2V 4V 10V 16V 10V 10V 25V 10V 4V 4V 4V 6 3V 50V 4V 25V 50V 25V 2 5V Ref No C323 C601 C602 C603 C604 C605 C606 C607 C608 C609 C701 C702 C703 C704 C705
16. ANTAL CHIP TANTAL CHIP CERAMIC CHIP CERAMIC CHIP 0 1uF CERAMIC CHIP 1uF 22uF 10uF 20 20 0 5 10 CERAMIC CHIP luF CERAMIC CHIP 1uF CERAMIC CHIP 1uF CERAMIC CHIP 1uF CERAMIC CHIP 1uF CERAMIC CHIP luF CERAMIC CHIP luF lt CONPOSITION CIRCUIT BLOCK gt CERAMIC CHIP 470PF 0 CERAMIC CHIP 22000PF 0 DIODE gt DIODE MA111 TX DIODE MA2ZD14001S0 LED CL 170HR CD T AB BATT DIODE MAZL068DOLSO TX L DIODE MA8062 DIODE MA8062 lt FERRITE BEAD gt FERRITE FERRITE OuH AEP UK EE OuH AEP UK EE lt C gt IC TA2123F EL IC NJM2185AV TE2 IC MM1279XVBE IC ML63512 119TBZ060 IC XC6371C251PL IC PST9008NL IC S 812115G QA T1 Remarks 25V 6 3V 16V 10V 25V 16V 25V 25V 25V 4V 6 3V 10V 50V 16V 10V 10V 10V 10V 10V 10V 10V 10V 50V 50V Ref No J301 JC114 JC214 L701 PH701 Q301 Q302 Q303 Q304 Q305 Q601 Q602 Q603 Q604 Q701 Q702 R101 R102 R103 R104 R105 R106 R107 R108 R109 R110 R111 R112 R112 R113 R150 R201 R202 R203 R204 R205 R206 R207 R208 R209 R210 Part No 1 779 867 81 1 216 864 11 1 216 864 11 1 412 032 11 8 749 014 43 8 729 800 71 8 729 423 75 8 729 423 75 8 729 421 23 8 729 422 18 8 729 403 42 8 729 402 84 8 729 420 50 8 729 420 50 8 729 230 72 8 729 420 50 216 849 11 216 839 11 216 611 11 216 831 11 216 823 11 cl 216
17. OL UNIT RM WME21 BATTERY CHARGER BC 7S UK BATTERY NI CD NC 6WM BATTERY CHARGER BC 7DY AEP FR EE CASE BATTERY CASE BATTERY CHARGE POUCH CARRYING MANUAL INSTRUCTION ENGLISH FRENCH MANUAL INSTRUCTION GERM AN DUTCH AEP MANUAL INSTRUCTION SWEDISH ITALIAN AEP MANUAL INSTRUCTION SPANISH PORTUGUESE AEP MANUAL INSTRUCTION FINNISH RUSSIAN AEP EE MANUAL INSTRUCTION POLISH CZECH EE HEADPHONE MDR ED136SP K SET The components identified by mark or dotted line with mark are critical for safety Replace only with part number specified Personal A amp V Products Company 28 99A1651 1 Printed in Singapore 1999 1 Published by Quality Engineering Dept Shibaura
18. SERVICE MANUAL Ver 1 0 1999 01 Manufactured under license from Dolby Laboratories Licensing Corporation DOLBY and the double D symbol DU are trademarks of Dolby Laboratories Licensing Corporation Tape section Frequency response Dolby NR off Output General Power requirements Dimensions w h d MICROFILM WM EX678 AEP Model UK Model Model Name Using Similar Mechanism Tape Transport Mechanism Type MT WMEX672 162 SPECIFICATIONS Playback 30 18 000 Hz Headphones REMOTE jack Load impedance 8 300 1 5 V One rechargeable battery or one R6 size AA battery Approx 77 7 x 109 1 x 21 4 mm 3 s 4 s x 27 3 inches incl projecting parts and controls Mass Supplied accessories Approx 140 g 5 0 oz Approx 205 g 7 3 oz incl rechargeable battery and cassette Battery case 1 Stereo earphones with remote control 1 Battery charger 1 Rechargeable battery NC 6WM 1 2 V 600 mAh Ni Cd 1 Rechageable battery carrying case 1 Carrying pouch 1 Design and specification subject to change without notice CASSETTE PLAYER SONY TABLE OF CONTENTS 1 SERVICE NOTE e 3 2 GENERAL ae 5 3 DISASSEMBLY 4 1 CASE BLOCK ASSEMBLY aapa 7 32 MAIN BOARD een MM 9 BS BELT EO eee ibn Me picis uteri bud 9 3 4 MOTOR FJ M90 1
19. SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY __2 SECTION 1 SERVISE NOTE Service Mode The service mode enables to operate the mechanism of WM EX678 while the MAIN board is opened Rotation of the idler gear A S side is detected using the photo reflector PH701 in the WM EX678 PH701 is located on the MAIN board therefore the rotation of the idler gear A S side cannot be detected by PH701 when the MAIN board is removed As aresult the motor cannot be controlled and cannot run correctly To repair the machine after the MAIN board is removed while the main power is turned on follow the procedures as described below 1 Setting 1 Remove the cabinets referring to section 3 DISASSEMBLY Open the MAIN board 2 Connect the motor M901 and the plunger solenoid PM901 to the MAIN board using the jumper wires When the extension jig 1 769 143 11 10 wires as a set is used they can be connected easily 3 Short the TAPE DETECT switch S901 1 and the ATS switch 5901 2 4 Connect AF oscillator to TP53 P TP14 GND 5 Connect DC 1 3 V from external regulated power supply and terminals of the battery 2 PRE SET status The PLAY FF and REW modes can be entered only from the PRE SET status 1 Check that the slider NR is in the center position S701 and the FWD REV switch is also in the center position When these switches are not in the center position set th
20. W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W 1 16W WM EX678 Description Remarks Ref No lt VARIABLE RESISTOR gt RES VAR CARBON 30K 30K VOL RES ADJ CARBON 2 2K TAPE SPEED lt SWITCH gt A SWITCH SLIDE DIRECTION SWITCH KEY BOARD SWITCH KEY BOARD gt REPEAT SWITCH KEY BOARD FF SWITCH KEY BOARD REW SWITCH SLIDE HOLD lt THERMISTOR gt THERMISTOR POSITIVE 3 3K lt VIBRATOR gt VIBRATOR CRYSTAL 32 768kHz i K K K K K K K K K KK KK K K KK KK K K K K K K K K K K K MISCELLANEOUS K KK K K K K K K K SWITCH LEAF HEAD MAGNETIC PLAYBACK MOTOR CAPSTAN REEL WITH PULLEY SOLENOID PLUNGER K gt gt F KE gt F ke K K K K K K K K K K K K K K K K K K KKK K K K KKK K K K K K K K K K K K K Ref No Part No RV301 1 225 684 21 RV601 1 225 254 21 S701 1 771 475 21 S702 1 771 053 21 S703 1 771 053 21 S704 1 771 053 21 S705 1 771 053 21 S707 1 572 922 11 THP601 1 810 794 11 X701 1 579 258 11 S901 1 762 553 11 HP901 1 500 576 11 M901 1 763 166 11 PM901 1 454 674 32 9 926 931 11 Sony Corporation Part No 1 418 021 11 1 528 252 21 1 528 543 22 1 528 744 23 1 759 700 21 3 008 521 01 3 029 488 01 3 864 887 11 3 864 887 21 3 864 887 31 3 864 887 41 3 864 887 51 3 864 887 61 8 953 272 90 Description Remarks ACCESSORIES KK K K K KK K K K K REMOTE CONTR
21. al REV reverse side REV face arri re FWD forward side FWD face avant b UK model Model for other countries Mod le pour le Royaume Uni Mod le pour les autres pays V O L n T _ Jog lever Levier multifunction Battery remainder 7 BATT lamp mark Jog lever i Voyant BATT Indicateur de capacit de Levier multifunction la pile i Number of tracks to be skipped Nombre de plages sauter to REMOTES A REMOTE lever Levier multifunction Number of tracks to be skipped Nombre de plages sauter _ Jog lever Levier multifunction SECTION 3 DISASSEMBLY Note Follow the disassembly procedure as shown in the flow chart below Set Case block assembly Main board Belt F2 mmm Motor F2 M901 Cassette lid Reel ornament Holder gt Pinch lever N R mun Magnetic head assembly assembly assembly assembly HP901 Note Follow the disassembly procedure in the numerical order given 3 1 CASE BLOCK ASSEMBLY S707 Two screws M1 4 x 2 5 Screw 4 M1 4 x 2 5 BEN knob HOLD Note When assembling the case block assembly align the knob HOLD with the position of S707 Q Remove the case block assembly in the direction of the arrow Two screws M1 4 x 2 5 3 2 MAIN BOARD Remove soldering four points from
22. arrow Note Be careful of the claw Claw ad 3 9 MAGNETIC HEAD HP901 Claw Q Remove the magnetic head HP901 in the direction of the arrow Note Be careful of the claw SECTION 4 MECHANICAL ADJUSTMENT PRECAUTION 1 Clean the following parts with a denatured alcohol moistened swab playback head pinch roller rubber belts capstan 2 Demagnetize the playback head with a head demagnetizer Do not use a magnetized screwdriver for 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 UJ e Torque Measurement Mode Torque Meter Meter Reading 16 to 25 gecm 21 GOFOD 0 22 to 0 34 ozeinch FWD 0 5 to 1 5gecm Back Tension CQ I02D 0 097 to 0 020 onch 16 to 25 gecm REW CQ 102C 0 22 to 0 34 ozeinch REW 0 5 to 1 5 gecm Back Tension 0 007 to 0 020 ozeinch More than 50 gecm FF REW CQ 201B More than 0 69 ozeinch SECTION 5 ELECTRICAL ADJUSTMENT PRECAUTION 1 Specified voltage 1 3 V DC Switch position MENU DONR OFF AVLS OFF BL SKIP OFF MB RV OFF Test Tape Tape Signa Usedfor WS 48A 3 kHz 0 dB Tape Speed Adjustment Tape Speed Adjustment Procedure Test tape WS 48A SkHz OdB Frequency counter Q REMOTE jack J301 1 Enter the FWD playback mode Adjust RV601 so that the value of the frequency cou
23. em to the PRE SET status as follows 2 Move the FWD REV switch S701 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 S701 to the center position in synchronism with the timing when the slider NR is moved TAPE DETECT ATS 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 m switch S702 to enter the STOP mode 4 Press the FF AMS switch S704 and the switch S705 4 PLAY mode 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 m switch 8702 to enter the stop mode 4 When the switch S703 of the MAIN board is pressed the slider N R moves once to the F side then moves to the R side When the FWD REV switch S701 is pressed in the synchronism with the above timing the machine can enter the PLAY R side mode Press the switch S703 again and move the FWD REV switch S701 in the synchronism with the motion of slider NR It enables the machine to enter into the PLAY F side mode Note 1 When you fail to enter the PLAY mode re start from step 1 PRE SET status Note 2 Regarding the S703 S702 S704 and S705 switches use these switches of the rem
24. mmander having phone and the remote control sensing I O signal input from remote commander having phone Tone selection signal output to TA2123F 1C301 REVIVE CTL L REVIVE OFF MEGA BASS GROOVE MEGA BASS Tone selection signal output to TA2123F C301 CTL L MEGA BASS OFF REVIVE GROOVE FRCTL O FWD REV selection signal output to TA2123F IC301 L FWD H REV BOOST CTL o Bass boost control signal output to TA2123F IC301 L OFF H ON Power supply ON OFF control signal output to TA2123F IC301 AMP CTL L power supply OFF H power supply ON The power supply ON OFF control of Dolby NR amplifier IC302 is performed Power mute control signal output to TA2123F 1C301 MUTE CTL L mute ON H mute OFF SET STOPI I Battery voltage detection input terminal when the machine is stopped A D input SET STOP2 I Reference voltage input terminal when the machine is stopped A D input BATT DET EE Battery voltage detection input terminal A D input KEY IN Key input terminal A D input PM CTL ETN Plunger drive signal output L plunger ON Control signal output to the rotation detection circuit of the capstan reel motor meocn o L rotation detection circuit ON LEDBATT O LED D703 drive signal output to BATT display L LED ON ILEDDOLBY O Drive signal output to DONR display Not used in this machine empty
25. nter reading becomes 3 000 Hz Specification value Frequency counter 3 Check that the frequency deviation at the beginning and ending of a tape is within 1 5 45 Hz Adjustment Point MAIN BOARD SIDE B RV601 12 6 1 BLOCK DIAGRAM SECTION 6 DIAGRAMS B SWITCH RIPPLE FILTER AUDIO MASTER AMP C301 D RF OUT BASE VCC HP901 RV301 J301 PLAYBACK a 14 WO Q REMOTE PRE VCC g hi M POWER AMP E e gt 08 gt gt PW OUT L cam FWD Dap 2 gt CH gt Qb R SW POWER AMP E CH R CH R CH PW OUT R gt gt Z Z DOLBY NR R CH PW AMP Gp ec PW OUTC IC302 gt AVLS CONTROL BASS BOOST POWER AMP SWITCH BST AMP L CH gt Q304 33 BATT B O vec REV DATA E 5 R CH 6 REMO E GND gt O R CH D z 0 J j l ccc LL lt S707 HOLD S701 MEGA BASS GROOVE S702 705 OFF HOLD FWD DIRECTION SWITCHING 0303 R CH q S901 1 REVIVE GROOVE o o STOP lt TAPE DETECT SWITCHING 0302 REV SYSTEM CONTROLLER 701 0600 9 5 2 88 8 Dat 7 90 420 616 gt no 1 1 1 522 2 d _ 25 5 6 gt m e lt gt oL 2 s 2 lt 8 53 a e x lt E us Li cc m 5 m 5 lu eo eo
26. ote control unit as much as possible Note 3 If a headphones are used the beep sound shows the timing of the FWD REV switch S701 SWITCH SWITCH S901 2 MAIN BOARD SIDE B LIL Plunger 901 J AF OSC Square wave sine wave en 10 Hz 3 5 dB Battery terminal O Battery terminal FF AMS MEM S704 _ E TP53 P IN be REW AMS 0 lt gt REPEAT 2703 S703 M901 m S702 FWD STOP gt REV9 oe TP14 GND Slider NR Slider NR oe lt lt CMT Tape drive mechanism in FF mode Gear FR Idler Gear Lef A T side eft side Gear REEL T side LF CE A lt hF D Pulley Reverse Flywheel R Insert Flywheel N Insert Flywheel R Motor Pulley Tape drive mechanism Tape drive mechanism in PLAY mode Gear NR FWD Left side REV Right side Idler Gear A T side Idler Gear A S side Gear Gear REEL S side REEL T sid Motor Pulley Cam Gear ROR Gear Y Sy V s Idler Gear Ce Pulley Reverse Insert Flywheel N Tape drive mechanism REW mode Gear FR REW Right side Idler Gear A S side Gear REEL S side e Motor Pulley Pulley Reverse Insert Flywheel Gear Y Insert Flywheel N SECTION 2 This section is extracted GENERAL from instruction manu
27. th no reference number in the exploded views are not supplied Abbreviation FR French EE East European Ref No Part No Description Remarks Ref No Part No 1 3 704 197 21 SCREW M1 4 x 2 5 LOCKING SILVER 13 3 029 205 31 1 3 704 197 23 SCREW M1 4 x 2 5 LOCKING BLACK 14 3 366 892 01 AEP FR EE 15 X 3376 277 1 2 3 029 230 01 KNOB HOLD 16 X 3376 279 1 3 3 029 227 01 PLATE TERMINAL ORNAMENTAL 17 3 365 630 41 4 3 029 233 51 LID BATTERY CASE SILVER 18 3 029 219 01 4 3 029 233 61 LID BATTERY CASE BLACK AEP FR EE 19 3 029 220 01 5 3 345 648 71 SCREW M1 4 TOOTHED LOCK 23 3 704 197 11 6 3 029 213 01 TERMINAL BOARD 23 3 704 197 13 7 3 375 114 41 SCREW 8 A 3021 172 A MAIN BOARD COMPLETE AEP UK EE 24 3 032 323 01 8 A 3021 173 A MAIN BOARD COMPLETE FR 25 3 032 805 01 9 3 029 210 01 TERMINAL BOARD MINUS 21 3 309 595 11 10 X 3376 278 1 TERMINAL BOARD ASSY BATTERY 28 3 031 460 01 11 3 366 892 11 SCREW M1 4 x 1 4 29 3 032 905 01 12 3 029 217 01 LEVER LOCK 30 3 328 483 11 901 1 762 553 11 24 When indicating parts by reference number please include the board name not supplied Description Remarks MD COVER SCREW M1 4 BRACKET ASSY BRACKET CASSETTE ASSY SCREW M1 4 KNOB OPEN SPRING TENSION SCREW M1 4 x 2 0 LOCKING SILVER SCREW M1 4 x 2 0 LOCKING BLACK AEP FR EE PAPER A SHIELD SHEET T1 6 SHEET INSULATING PACK SHEET BT CUSHION TO 4 SHEET
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