SERVICE MANUAL aaaaa
Contents
1. v20 252 na 1 1 TC W255 5 DECK B TCM YM47CW 24 No Part No Description Remarks No Part No Description Remarks 151 3 390 B01 01 CASE CASSETTE 171 7 687 501 31 SCREW TOTSU PTTWH 2 686 152 3 390 823 01 WASHER F 172 4 894 969 01 WASHER 153 7 685 103 19 SCREW P 2X5 NON SLIT 173 4 894 970 01 BUTTON 5 W 154 4 894 951 01 KEEP PLATE 174 4 894 971 01 BUTTON LEVER 155 3 390 803 01 BUSHING 0 175 7 624 106 04 5 RING 3 0 156 4 894 953 01 5 REEL 176 4 895 001 01 GEAR 157 4 894 954 01 SPRING 177 3 390 817 01 LUG d 158 7 621 905 65 SCREW TOTSU P 2X8 180 4 894 972 01 BUTTON BRACKET R 159 7 621 255 15 SCREW P 2X3 18l 4 894 973 01 SPRING 160 4 894 955 01 SPRING 182 3 390 820 01 SPRING LEAF 161 4 894 956 01 SENSOR 183 3 390 821 01 SPACER 162 3 390 804 01 SPRING PINCH ARM 184 3 390 819 01 LUG 163 4 894 960 01 BUSH 187 4 895 017 01 BUTTON BRACKET ASSY 164 4 894 961 01 IDLER GEAR 251 7 685 852 01 SCREW BVTT 2X5 S 165 4 894 962 01 IDLER ARM 252 4 894 957 01 HEAD BASE B 166 4 894 963 01 T REEL ASSY 253 4 894 958 01 INTERLOCK ARM 167 4 894 964 01 GEAR HE909 1 543 261 11 HEAD ERASE 886 01 24 168 3 390 805 01 ROLLER 55 PINCH HRP901 1 543 424 11 HEAD MAGNETIC REC PB 169 4 894 966 01 SPRING 5905 1 570 716 11 SWITCH LEAF FWD 170 4 82. oun ting Pagan REPLACE THESE COMPONENTS WITH SONY PARTS 2 2 Schematic Diagram 11 WHOSE PART NUMBERS AS SHOWN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY 3 EXPLODED VIEWS AND ATTENTION COMPOSANT AYANT RAPPORT BARTS LIST yra patie 15 LA S CURIT 4 ELECTRICAL PARTS LIST 21 LES COMPOSANTS IDENTIFI S PAR UNE TRAME ET UNE MARQUE SUR LES DIAGRAMMES SCH MATIQUES ET LA LISTE DES PIECES SONT CRITIQUES POUR LA S CURIT DE FONCTIONNEMENT NE REM PLACER CES COMPOSANTS QUE PAR DES PIECES SONY DONT LES NUM ROS SONT DONN S DANS CE en STEREO CASSETTE DECK TC W255 SAFETY CHECK OUT US Model FUNCTION CONTROLS 1 3 5 6 7 After correcting the original service problem perform the following safety check before releasing the set to the customer Check the antenna terminals metal trim metallized knobs screws and all other exposed metal parts for AC leakage Check leakage as described below LEAKAGE TEST The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis must 1 Cassette holder deck not exceed 0 5 mA 500 microampers Leakage current can be measured by any one of three 2 SPEED indicators met
3. DECK DECKA Adjustment screw high speed V RV402 RV404 DECK DECK B normal speed TC W255 Playback Level Adjustment DECK A Record BIAS Adjustment DECK B Procedure DECK B Setting Mode FWD playback TAPE SELECT NORMAL DECK B test tape Procedure P 4 L300 315 Hz 0 dB 1 Mode record AF OSC blank tape lt 572 LINE OUT 1150007 Adjust 60011 DECK A side RV101 L CH RV201 R CH LINE IN DECK B side RV102 L CH RV202 R CH 1 315 Hz 0 025 V 30 dB so that the specifications are satisfied 2 10 kHz Specification 2 Mode playback LINE OUT level 0 44 V 5 dB VTVM 7 level difference between the channels 2 within 0 5 dB set 1 Adjustment Location audio board LINE OUT Play back the tape recorded step 1 If the speci DECK A fication is not satisfied adjust C308 and repeat steps 14042 PUG Specification OUT level of 10 kHz signal telative to that of 315 Hz 0 dB 0 5 dB 96 5 21 1 M Adjustment Location audio board 2 7 4 22 42 6 99 N ee 21 1 16307 3 22 42 RV202 RV102 oo o R CH L CH DECK B 255 Record Level Adiustment DECK
4. SERVICE MANUAL E a Model Model Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation DOLBY and the double D symbol DO are trademarks of Dolby Laboratories Licensing Corporation TC W255 are a stereo double cassette deck in SEN 220 SEN 270 SEN 470 SEN 570 and SEN 670 respectively Tape Transport DECKA TCM YM47CW 23 SPECIFICATIONS Recording system 4 track 2 channel stereo Mechanism Type DECK B TCM YMA7CW 24 Frequency response DOLBY NR OFF With IV cassette Sony METAL ES 30 15 000 Hz 3 dB DIN With TYPE cassette Sony UX S _TABLE OF CONTENTS 30 14 000 Hz 3 dB DIN With TYPE cassette Sony HF S Section Title Page 30 13 000 Hz 3 dB DIN s Wow and flatter 0 12 WRMS Specifications 1 20 0 2 DIN Safety Check out US Model 2 enera lt Dimensions Approx 430 x 135 250 mm wih d Function of 17 x 57 x 97 8 inches incl projecting parts controls 1 ADJUSTMENTS Weight Approx 3 kg 6 lb 10 oz net 1 1 Mechanical Adjustments 3 1 2 Electrical Adjustments 3 SAFETY RELATED COMPONENT WARNING COMPONENTS DENTIFIED BY SHADING AND MARK 2 DIAGRAMS A ON THE SCHEMATIC DIAGRAMS AND IN THE 24 Mounting Di PARTS LIST CRITICAL SAFE
5. speed checker or digital frequency test tape counter P4LAT00 WS48A 10kHz 10dB 3 kHz 0 dB 472 He Rapa LINE OUT 1 Connect pin to with the lead wire CN408 LINE OUT FIXED Specification high speed Speed checker Digital frequency counter 2 Turn the adjustment screw and check output 20 5 10 5 5 980 30 Hz peaks If the peaks do not match for L CH and R CH turn the adjustment screw so that outputs Frequency difference between the beginning and match within 1 dB of peak SSS the end of the tape should be within 1 5 90 Hz Adjustment location N DECK A side RV401 DECK B side RV403 within 1 dB N 2 Remove the wire in step 408 Output level Specification normal speed q Ee Speed checker Digit l frequency counter 0 3 0 3 2 980 10 Hz Frequency difference between the beginning and the end of the should be within 1 5 45 Hz Adjustment location 1087 rew position DECK A side RV402 Ph peak peak DECK B side RV404 as 3 If the specifications are not satisfied repeat step 1 and 2 screen pattern 90066 phase 45 90 135 good Adjustment Location audio board connect pin CN408 wrong 3 After the adjustments apply suitable locking compound to the parts adjusted Adjustment Location m AV103
6. 309 0102 202 0103203 M4066BP 2503399 2803399 OUT SWITCH switch 03 0305 3 3132 25AII75 1 15 BIAS SWITCH 1581 0104 204 1 25 6345 SWITCH 5264 TAPE 0 8 81 9105 205 0106 206 25 6345 25 6345 EQ SWITCH EQ SWITCH 0415 2503399 SWITCH 9 10 1 12 13 15 Qn RI35 r 5 i A 6 x 5 pa 7 R l evi He j 4 0104 204 1C303 25 6345 4570 SWITCH AMP T 1 ILAIZER BOARD 1 4 S304 TAPE DECK 8 TER fi 7 1 C i is los Teese T 1 z 4 245 ae the 1 44 m 12 4 CD 0413 0105 205 9 06 206 2SC3399 25 6345 56345 SWTCH EQ SWITCH 9 SWITCH H 1 2 3 4 5 6 7 2 2 SCHEMATIC lt DIAGRAM AUDIO BOARD D a E CUN PLAYBACK I 4 20 904 X HEAD 1 5 5 DECK A Ho HP9O E PLAYBACK HEAD R HRP90I RECORD PLAYBACK HEAD DECK 8 904 PERC um 7 MER aet
7. 1 68 1 68 1 6W 1 68 1 6 1 64 1 6 1 6 1 6 1 6 1 6 1 6 1 6 1 6 1 68 1 6 1 6W 1 6 1 6W 1 68 1 6 1 6 1 6 1 6 1 6W 1 64 1 6W 1 6 1 6 T W255 ELECTRICAL PARTS ELECTRICAL PARTS Ref No Part No Description Ref No Part No Description R265 1 249 441 11 CARBON 10 5 1 6 R418 1 249 437 11 CARBON AK 55 1 5 R266 1 249 408 11 CARBON 180 5 1 68 8419 1 247 887 00 CARBON 220K 55 1 6 8267 1 249 429 11 CARBON 100 55 1 6W R420 1 249 437 11 CARBON 5 1 6W R268 1 249 421 11 CARBON 2 2K 5 1 6 1 249 429 11 CARBON 10K 52 6W R269 1 249 414 11 CARBON 560 54 1 6 8422 1 249 437 11 CARBON 47 5 1 6 R270 1 215 436 00 4 3K 5 1 64 R423 1 249 437 11 CARBON 55 1 6N R27 1 249 441 11 CARBON 10 5 1 6 424 1 249 427 11 CARBON 6 8 5 1 5 272 1 249 410 11 CARBON 270 5 1 6 R425 1 249 435 11 CARBON 33k 5 1 6 R273 1 249 423 11 CARBON 3 3K 5 1 6 8426 1 249 437 11 CARBON 5 1 6N 8274 1 249 435 11 CARBON 33K 55 1 6 R427 1 249 425 11 CARBON 4 7K 55 1 84 R301 1 247 704 11 CARBON 220 55 1 4 8428 1 249 437 11 CARBON 47K 5 1 64 R302 1 247 704 11 CARBON 220 5 1 4 R429 1 249 429 11 CARBON 55 1 6 305 1 249 417 11 CARBON 85 1 68 8430 1 249 417 11 CARBON 5 1 68 2306 1 249 431 11 CARBON 15K 5 1 6W R431 1 249 417 11 CARBON 5t 1 64 R30 1 247 704 11 CARBON 220 55
8. 1 44 R432 1 249 417 11 CARBON 5 1 6 8308 1 247 704 11 CARBON 220 5 1 40 R433 1 249 425 11 CARBON 4 7K 55 1 6 R309 1 249 425 11 CARBON 4 7K 5 1 6N R434 1 249 425 11 CARBON 4 7K 5h 1 6 8313 1 249 404 00 CARBON 82 55 1 6 8435 1 249 429 11 CARBON IK 855 1 6 R314 1 247 688 11 CARBON 10 85 1 4 R436 1 215 430 00 CARBON 2 4K 5 1 6W R315 1 249 433 11 CARBON 22K 55 1 64 R437 1 215 402 00 CARBON 160 5 1 64 R316 1 249 433 11 CARBON 55 1 6 R439 1 249 417 11 CARBON 1K 5 1 6N R317 1 249 429 11 CARBON 10K 1 6 RV101 1 230 630 11 RES ADJ CARBON 10K R318 1 249 429 11 CARBON 10K 5 1 6W RV102 1 230 630 11 RES ADJ CARBON 10K R319 1 249 427 11 CARBON 6 8K 5 1 6 103 1 230 630 11 RES ADJ CARBON 10K R320 1 247 706 11 CARBON 330 55 1 4W 104 1 228 670 00 RES VAR SLIDE 20K REC LEVEL L R321 1 249 413 11 CARBON 470 5 1 6W RY201 1 230 630 11 RES ADJ CARBON 10K R322 1 249 433 11 CARBON 22 55 1 64 RV202 1 230 630 11 RES ADJ CARBON 10K R323 1 249 441 11 CARBON 100K 5 1 6W RV203 1 230 630 11 RES ADJ CARBON 10K R325 1 249 417 11 CARBON 1K 5 1 6W RV204 1 228 670 00 RES VAR SLIDE 20K REC LEVEL R R326 1 215 460 00 METAL 43X 12 1 6 RV401 1 228 991 00 RES ADJ CARBON 2 2K R328 1 247 700 11 CARBON 100 85 1 M RV402 1 228 990 00 RES ADJ CARBON R329 1 247 700 11 CARBON 100 5 1 4 403 1 228 991 00 RES ADJ CARBON 2 2K R330 1 249 438 11 CARBON 56K 55 1 6W RV404 1 228 990 00 RES ADJ CARBON 1K
9. 172 4 894 969 01 WASHER 173 4 894 970 01 BUTTON SHAFT 174 4 894 971 01 BUTTON LEVER 175 7 624 106 04 5 RING 3 0 176 4 895 001 01 GEAR 177 3 390 817 01 LUG 178 4 895 015 01 HEAD BASE 179 4 895 016 01 GUIDE 180 4 894 972 01 BUTTON BRACKET R 181 4 894 973 01 SPRING 182 3 390 820 01 SPRING LEAF 183 3 390 821 01 SPACER 184 3 390 819 01 LUG 187 4 895 017 01 BUTTON BRACKET L ASSY 190 7 685 133 19 SCREW P 2 6X6 TYPEL 901 1 543 424 11 HEAD MAGNETIC REC PB 901 1 571 036 11 SWITCH LEAF DETECTION SW 5903 1 570 716 11 SWITCH LEAF FWD 17 TC W255 4 DECK A No Part No Description Remarks 0 Part No Description Remarks 01 4 894 968 01 CHASSIS ASSY 217 3 390 810 01 LEVER PLAY 02 3 390 806 01 FW ASSY 218 4 894 997 01 ARM ASSY 203 3 390 807 01 BELT 220 4 894 999 01 SPRING 204 4 894 976 01 P WASHER 221 7 685 781 04 SCREW PTT 2 4 S 205 4 894 977 01 BACK PLATE 222 7 628 253 90 SCREW PS 2 6 4 207 4 894 980 01 EJECT ARM 223 3 390 814 01 BRACKET MOTOR 208 3 390 809 01 SPRING 225 3 390 816 01 BELT SQUARE 209 4 894 982 01 5 ARM 227 4 894 994 01 LEVER 210 4 894 983 01 SPRING 226 3 390 822 01 BUSHING 211 4 894 984 01 FUNCTION LEVER 229 7 685 133 19 SCREW P 2 6X6 212 4 894 987 01 5 LEVER 230 4 894 978 01 SPRING 213 4 894 988 01 FF LEVER M 231 7 687 233 11 SCREW PTPWH 2 6X6 214 4 894 989 01 SPRING 30
10. 2541345 25 3399 2503399 338 100 22K 1K 5 6K 8 2K 1K 3 3K 10K 10K 10K 2 2K 12K 2 2K 11K 33K 6 2K 100K 22 100K 100K 4 7 4 7K 270K 82 130K 5 6K 2 2K 10K 12k 270K 82 130K 5 6K 1K 100K 220K 15K 220K 6 8K 2 2K 220K 75K 5 5 5 5 55 x 5 55 55 55 55 55 55 55 55 g 5 5 55 55 55 55 5 5t 5t 5 5 5 5 5 5 5 5 5 5 5 5 55 1 6 1 6 1 6 1 6 1 6 1 6 1 6 1 6 1 6W 1 6 1 68 1 6 1 68 1 6 1 68 1 68 1 6 1 64 1 6 1 6 1 64 1 68 1 6 1 68 1 6 1 64 1 64 1 6W 1 64 1 60 1 68 1 6 1 6W 1 6W 1 6W 1 64 1 69 1 69 1 69 1 64 1 64 1 6 1 6 1 6W 1 6W ELECTRICAL PARTS Ref No Part No Description R164 1 249 430 11 CARBON R165 1 249 441 11 CARBON 8166 1 249 408 11 CARBON R167 1 249 429 11 CARBON R168 1 249 421 11 CARBON R169 1 249 414 11 CARBON R170 1 215 436 00 CARBON R171 1 249 441 11 CARBON R172 1 249 410 11 CARBON R173 1 249 423 11 CARBON R174 1 249 435 11 CARBON 8201 1 249 417 11 CARBON R202 1 249 435 11 CARBON R206 1 249 441 11 CARBON 8207 1 249 433 11 CARBON 209 1 249 417 11 CARBON 82107 1 247 849 00 CARBON R213 1 249 428 11 CARBON R215 1 249 417 11 CARBON R216 1 249 417 11 CARBON R217 1 249 423 11 CARBON R218 1 249 429 11 CARBON 8219 1 249 429 11 CARBON R227
11. 5 50v C253 1 124 767 00 ELECT 2MF 20 50v 144 1 130 474 00 MYLAR 0 0018MF 5 50 6303 1 124 46 11 ELECT 47MF 20 10v C145 1 110 201 00 MYLAR 0 0033MF 5 50 C304 1 124 444 00 ELECT 220 20 10 C146 1 130 480 00 MYLAR 0 0056MF 50 C305 1 124 444 00 ELECT 220MF 20 10 C147 1 136 154 00 FILM 0 012 50 C306 1 124 446 11 ELECT 47MF 205 10v 148 1 130 478 00 MYLAR 0 0039 5 50 307 1 124 446 11 ELECT 47MF 205 108 6159 1 130 471 00 MYLAR 0 001 55 50v C308 1 141 225 00 TUNING TRIMAR C150 1 130 473 00 MYLAR 0 0015MF 50 309 1 124 791 11 ELECT LMF 20 50v C151 1 130 478 00 MYLAR 0 0039MF 52 50 310 1 124 925 11 ELECT 2 2 20 50 C152 1 130 481 00 MYLAR 0 0068MF 5 50 6311 1 130 295 00 FILM 0 0082 55 100v 153 1 124 767 00 ELECT 2 2MF 20 50V 6312 1 130 287 00 FILM 0 0039 5 100 203 1 125 925 11 ELECT 2 2MF 20 50V 0313 1 130 287 00 0 0039MF 55 100v E C204 1 124 925 11 ELECT 2 2 20 50 C314 1 124 902 00 ELECT 0 47MF 20 50 1 C205 1 124 791 11 ELECT IMF 20 50 C315 1 124 791 11 ELECT 1 20 808 0007 121627290231 405 5 58 56 46 162 317 1 124 446 11 C208 1 162 782 31 CERAMIC 100 105 50 4 10 21 TC W255 _ELECTRICAL PARTS ELECTRICAL PARTS Ref No Part No Description Ref No Part No Description C318 1 124 444 00 ELECT 220MF 20 10 0415 8 719 940 76 DIODE 155132
12. B Setting TAPE SELECT NORMAL DECK B Procedure 1 Mode record Ar OSC blank tape C CS 121 attenuator oll OOO LINE IN 315 Hz 0 25 V 10 2 Mode playback LINE OUT Play back the tape recorded in step 1 If the speci fication is not satisfied adjust RV103 L CH 203 R CH and repeat steps 1 and 2 Specification LINE OUT level 5 dB 0 5 dB Adjustment Location audio board 27 7 7307 1C307 7 2 42 RV203 RV103 R CH L CH TC wW255 SE DI Semiconductor Lead Layouts CXA1100P 2SB1094 L IR2E02 2SD1585 K 6151413121 M4011BP M4030BP 25 1815 BL M4066BP M4073BP 8131211105 8 10 2 185132 4558 i APC4570C APC4570C 1 8765 Soyer Top vae HZS11A1L HZS6A1L 2SA1175 TS t Ej SEL1120W 2SA1345 2SA1348 2SC634SP 2SC3399 2SC3402 SEL2210W lt C SEL2510C anode cathode long y un _TC W255 2 1 MOUNTING DIAGRAM TION 2 GRAMS Semiconductor Location Ref No Location Ref No Location D101 B 19 Q101 67 0102 8 19 0102 F 6 D103 B 19 Q103 F 6 D104 8 18 0104 6 10 0105 8 18 0105 1 14 0106 8 18 6106 1 14 0107 17 0201 0 7 D201 B 19 0202 E 6 0202 B19 0203 E 6 D203 B 19 Q204 G 10 D204 B 18 Q205 1 14 0205 18 0206 1 14 0206 8 18 0302 68 020
13. PAUSE button I ac 0 15 F voltmeter 8 LEVEL recording level controls deck only 0 75 Adjust the recording level 1 DUBBING SPEED selector Depress for the high speed dubbing a HIGH Press again to return to the normal dubbing speed a NORMAL Earth Ground Fig A Using an AC voltmeter to check AC leakage 11 REC record button 12 DOLBY NR switch Depress to record or play back using the Dolby Noise Reduction system Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation DOLBY and the double D symbol DO are trademarks of Dolby Laboratories Licensing Corporation 2 1 1 MECHANICAL ADJUSTMENTS PRECAUTION 1 Clean the folowing parts with a denatured alcohol moistened swab record play back head pinch roller erase head rubber belts capstan idlers Torque Measurement Torque Torquement Meter reading 30 70 g cm FND 6021926 042 0 97 oz inch FWD 1 5 S55g cm Back tension 59046 m 0 076 oz inch 4 63 or more REW 2018 1 2 ELECTRICAL ADJUSTMENTS 1 Demagnetize the record playback and erase head with a head demagnetizer 2 Do not use a magnetized screwdriver for the adjustments 3 After the adjustments apply suitable locking compound to the parts adjusted 4 The adjustments should
14. R331 1 249 438 11 CARBON 56K 5 1 6N RY301 1 515 519 00 RELAY R401 1 247 717 11 CARBON 2 2K 5 1 4 R402 1 247 717 11 CARBON 2 2K 5 1 44 5304 1 570 977 11 SWITCH PUSH 3 KEY TAPE DOLBY NR 5401 1 570 978 11 SWITCH PUSH 1 KEY DUBBING SPEED R403 1 247 717 11 CARBON 2 2K 5 1 5901 1 571 036 11 SWITCH LEAF DETECTION SW R404 1 247 717 11 CARBON 2 2K 5 1 40 405 1 249 425 11 CARBON 4 7K 5 1 60 5902 1 570 715 11 SWITCH LEAF MOTOR 5903 1 570 716 11 SWITCH LEAF FWD R406 1 249 422 11 CARBON 2 7K 5 1 60 5904 1 570 715 11 SWITCH LEAF R407 1 249 420 11 CARBON 1 8K 5 L 6W 2408 1 249 420 11 CARBON 1 8K 5 1 6w S905 1 570 716 11 SWITCH LEAF 5906 1 571 037 11 SWITCH LEAF REC SW R409 1 249 408 11 CARBON 180 55 1 6 R410 1 249 420 11 CARBON 1 8K 5 1 6W T301 1 433 303 11 TRANSFORMER 81 5 OSCILLATION 8411 1 249 408 11 CARBON 180 5 1 68 8412 1 249 425 11 CARBON 4 7K 55 1 6 R413 1 249 437 11 CARBON 5 1 60 R414 1 249 437 11 CARBON 4K 55 1 64 8415 1 249 429 11 CARBON 10K 5 1 6 R416 1 249 437 11 CARBON 4K 5 1 6W R417 1 249 437 11 CARBON 47K 5 1 6 Sony Corporation English Audio Group 87 0688 1 Printed Japan 9 952 735 11 24 1987 5
15. 1 249 429 11 CARBON R228 1 249 421 11 CARBON R229 1 249 430 11 CARBON R231 1 249 421 11 CARBON R234 1 215 446 00 CARBON 8235 1 249 435 11 CARBON 8237 1 215 440 00 80 R238 1 249 441 11 CARBON R239 1 249 433 11 CARBON R240 1 249 441 11 CARBON R241 1 249 441 11 CARBON R242 1 249 425 11 CARBON R243 1 249 425 11 CARBON R244 1 215 479 00 CARBON 8245 1 249 404 00 CARBON R246 1 215 472 00 CARBON R247 1 247 849 00 CARBON R248 1 249 421 11 CARBON R249 1 249 429 11 CARBON R250 1 249 430 11 CARBON R251 1 215 479 00 CARBON R252 1 249 404 00 CARBON R253 1 215 472 00 CARBON R254 1 247 849 00 CARBON R255 1 249 417 11 CARBON R256 1 249 441 11 CARBON R257 1 247 887 00 CARBON R258 1 249 431 11 CARBON R259 1 247 887 00 CARBON R260 1 249 427 11 CARBON 8261 1 249 421 11 CARBON R262 1 247 887 00 CARBON R263 1 215 466 00 CARBON R264 1 249 430 11 CARBON 23 3 3K 10K 10K 2 2K 2 2K 11K 33K 6 2K 100K 2 100K 100K 4 7K 4 7K 270K 130K 5 6K 2 2K 10K 12K 270K 82 130K 5 6K 1K 100K 220K 15K 220K 6 8K 2 2K 220K 75K 12K 5 5 55 55 55 55 55 55 5 5 5 5 5 5 55 55 55 55 55 5 5 5 5 5 5 5 57 5 5 5 5 5 5 TC W255 1 6W 1 64 1 6W 1 6W 1 6W 1 69 1 6 1 6W 1 6W 1 6 1 64 1 64 1 64 1 6 1 64 1 64 1 6 1 68 1 6 1 60 1 6 1 6 1 6 1 6 1 6W 6 1 6 1 6
16. 2 4 894 985 01 PAUSE ARM 215 4 894 990 01 REW LEVER 303 4 894 986 01 PAUSE LEVER 216 3 390 827 01 SPRING M901 3390 801 1 MOTOR ASSY 5902 1 570 715 11 5 LEAF MOTOR 18 0403 0401 402 0408 25015865K 252785 HZS6AIL Hv REG 6V REG DRIvER 0402 Note WW oa All capacitors unless otherwise noted pF uuF 50WV or less are not indicated except for electrolytics 4 2 and tantalums Lar TS All resistors are in and 4W or less unless otherwise EUREN 18 2 0404 405 94 2541175 6V REG DRIVER 19 20 LEVEL METER BOARD 409 55132 DUBBING SW BOARD 0422 R430 LED i 5520 T EQULAIZER BOARD 1 4 4 1 403 407 1 2 3 2 SCHEMATIC 2 DIAGRAM AUDIO BOARD 4301 1 NEW F ji fime w Y REC VOL BOARD 1304 4570 1 PB EQ 1306 yPC4558C L Pf AMP an r4 a 4 amp LI i IC305 4570 PB REC EQ HRP901 RECORD PLAYBACK HEAD n DECK B HRPSOI RECORD PLAYBACK HEAD t 1
17. 7 8 17 0303 58 0301 648 0304 0302 69 3305 H 9 D401 5 14 0306 68 0402 13 Q401 C13 D403 C43 Q402 C3 D404 C43 Q403 B 12 0405 5 43 0404 0 13 0406 11 0405 E 13 0407 E 11 0406 14 0409 0 11 0407 11 0411 0 11 0408 11 0412 10 0409 E 10 D413 11 0410 F 11 D414 F 10 0411 10 0415 0 0412 E11 D416 D 10 Q413 F 10 D417 E 10 D418 F 10 D419 F 10 D420 F 10 D421 11 0422 K9 D423 K 10 D424 K 8 D425 D 10 IC101 19 1 201 18 10303 1 304 F 5 C305 H 6 1C306 D 5 1C308 F 7 09 65 401 10 402 5 10 16403 F 11 Note Color code of sleeving over the end of the jacket gt parts extracted from the component side parts extracted from the conductor side gt REC VOL BOARD 255 AEP MODEL US CANADIAN MOD 3 4 2 i i s a dis S 71 1 TC W255 65 44 5 16 47 10 18 19 20 TC W255 LLIL SECTION 3 EXPLODED VIEWS AND PARTS LIST NOTE The mechanical parts with no reference The construction parts of an assembled number in the exploded views are not part are indicated with a collation supplied number in the remark column Items marked are not s
18. 94 967 01 SPRING TC W255 6 DECK B No Part No Description 201 4 894 968 01 CHASSIS 55 202 3 390 806 01 FW ASSY 203 3 390 807 01 BELT 204 4 894 976 01 WASHER 205 4 894 977 01 BACK PLATE 207 4 894 980 01 EJECT ARM 208 3 390 809 01 SPRING 209 4 894 982 01 5 ARM 210 4 894 983 01 SPRING 211 4 894 984 01 FUNCTION LEVER 12 4 894 987 01 S E LEVER 213 4 894 988 01 FF LEVER 214 4 894 989 01 SPRING 215 4 894 990 01 REW LEVER 218 4 894 997 01 POWER ARM ASSY 220 4 894 999 01 SPRING 221 2 685 781 04 SCREW PTT 2 4 S 222 7 628 253 90 SCREW PS 2 6 4 20 Remarks No Part No Description Remarks 223 3 390 814 01 BRACKET MOTOR 225 3 390 816 01 BELT SQUARE 228 3 390 822 01 BUSHING C 229 7 685 133 19 SCREW P 2 6X6 TYPEl 230 4 894 978 01 SPRING 231 7 687 233 11 SCREW PTPWH 2 6 6 301 4 894 979 01 SPRING 302 4 894 985 01 PAUSE ARM 303 4 894 986 01 PAUSE LEVER 304 3 390 810 01 LEVER PLAY 305 3 390 811 01 LEVER REC STOP 306 4 894 994 01 REC LEVER 308 3 390 828 01 LEVER RSW 309 3 390 829 01 BRACKET SW 310 7 685 791 04 SCREW PTT 2 6 5 5 M902 X 3390 801 1 MOTOR ASSY 5904 1 570 715 11 SWITCH LEAF MOTOR S906 1 571 037 11 SWITCH LEAF REC SW 255 SECTION 4 ELECTRICAL PARTS 15 NOTE Items marked are not stocked since CAPACITORS 3 they are seldom required for routine MF uF PF puF 4 Ser
19. C319 1 124 444 00 ELECT 220MF 20 10 0416 8 719 940 76 DIODE 155132 C320 1 129 713 00 FILM 0 0082MF 10 630 0417 8 719 940 76 0100 155132 C321 1 162 294 31 CERAMIC 0 001MF 10 SOV 0418 8 719 940 76 DIODE 155132 C322 1 162 294 31 CERAMIC 0 001MF 10 50 0419 8 719 940 76 DIODE 155132 C323 1 161 494 00 CERAMIC 0 022MF 25V 0420 8 719 940 76 DIODE 155132 C401 1 126 105 11 ELECT 1000MF 20 35V 0421 8 719 940 76 DIODE 155132 C402 1 124 555 00 ELECT 1000MF 20 16 0422 8 719 303 24 DIODE SEL1120W C403 1 124 555 00 ELECT 1000MF 205 16V D423 8 719 303 24 DIODE SEL1120W C404 1 124 445 00 ELECT 100MF 200 164 0424 8 719 303 24 DIODE SEL1120W C405 1 124 445 00 ELECT 100MF 20 16 0425 8 719 933 63 DIODE HZSLIAIL C406 1 124 446 1 ELECT 47 20 10v 909 1 543 261 11 HEAD ERASE 886 01 24 C407 1 124 472 11 ELECT 470MF 20 109 C408 1 124 472 11 ELECT 470MF 20 10 901 1 543 424 11 HEAD MAGNETIC REC PB 409 1 162 294 31 CERAMIC 0 001MF 10 50 HRP901 1 543 424 11 HEAD MAGNETIC REC PB C410 1 162 294 31 CERAMIC 0 001MF 10 50v 411 1 123 875 91 ELECT 10MF 20 50 16101 8 759 912 79 IC IR2EO2 C412 1 123 875 91 ELECT 10MF 20 50V IC201 8 759 912 79 IC IR2E02 16303 8 759 106 41 1 UPC4570C C413 1 161 494 00 CERAMIC 0 022MF 25V C414 1 123 875 91 ELECT 10 20 50 16304 8 759 111 44 IC UPC4570C 1 C415 1 124 927 11 ELECT 4 7MF 20 50V IC305 8 759 111 44 1 UPC4570C 1 16306 8 759 145 58 IC UPCA558C CN308 1 564 507 11 PLUG C
20. E D ORNAMENTAL 65 4 916 840 11 BUTTON BLOCK A CONTROL 55 3 332 487 01 PLATE ORNAMENTAL 66 4 916 841 11 BUTTON BLOCK B CONTROL 56 4 917 253 11 KNOB B SLIDE 67 7 685 646 79 SCREW BYTP 3X8 N S 57 X 3332 459 1 PANEL ASSY 68 7 685 133 19 SCREW P 2 6X6 TYPE2 NON SLIT 58 3 332 449 01 CUSHION DISPLAY 70 3 332 490 01 PLATE SHIELD 59 3 332 551 01 HOLDER LED 902 1 548 596 21 COUNTER TAPE MIDDLE TYPE 60 4 914 974 01 PLATE ORNAMENTAL CASSETTE 3 DECK A TCM YM47cwW 23 151 5 161 HP901 ese ee 163 1634 Y 164 J 156 159 158 184 160 2 No Part No Description 151 3 390 801 01 5 CASSETTE 152 3 390 823 01 WASHER F 183 7 685 103 19 SCREW P 2X5 2 NON SLIT 154 4 894 951 01 PLATE 155 3 390 803 01 BUSHING D 156 4 894 953 01 5 REEL 157 4 894 954 0 SPRING 158 7 621 905 65 SCREW TOTSU P 2X8 159 7 621 255 15 SCREW P 2X3 160 4 894 955 01 SPRING 161 4 894 956 01 SENSOR 162 3 390 804 01 SPRING PINCH ARM 163 4 894 960 01 BUSH 164 4 894 961 01 IDLER GEAR 165 4 894 962 01 IDLER ARM 166 4 894 963 01 REEL ASSY 167 4 894 964 01 GEAR 168 3 390 805 01 ROLLER ASSY PINCH 169 4 894 966 01 SPRING 170 4 894 967 01 SPRING 7 lt 177 155 7 166 4 165 4 TC W255 153 154 Remarks No Part No Description Remarks 171 7 687 501 31 SCREW TOTSU PTTWH 2 6 6
21. ECT 2 2MF 20 508 6233 1 136 273 91 FILM 75PF 5 630V Cll4 1 124 925 11 ELECT 2 2 20 50 C234 1 161 371 00 CERAMIC 0 0047MF 30 16Y C117 1 124 767 00 ELECT 2 2MF 20 508 C235 1 161 327 00 CERAMIC 0 0033MF 30 16 C118 1 136 175 00 FILM 0 68MF 5t 50v C238 1 162 289 31 CERAMIC 390 105 50v C127 1 124 925 11 ELECT 2 2MF 20 50v C239 1 124 927 11 ELECT 4 7MF 20 50 1 128 1 136 440 11 FILM 39 5 630 C240 1 124 446 11 ELECT 47MF 20 10v C129 1 162 290 31 CERAMIC 470PF 10 50v 6241 1 123 875 91 ELECT 10MF 20 50 C130 1 162 282 31 CERAMIC 100 10 50v C242 1 136 159 00 FILM 0 033 55 50v 6131 1 136 157 00 FILM 0 022 5 50v C243 1 136 153 00 FILM 0 01MF 5 50 C132 1 162 284 31 CERAMIC 150PF 10 50v C244 1 130 474 00 MYLAR 0 0018MF 5 50 C133 1 136 273 91 FILM 75PF 5 630v C245 1 110 201 00 0 0033MF 5 507 C134 1 161 377 00 CERAMIC 0 0047MF 30 lev C246 1 130 480 00 MYLAR 0 0056MF 5t 50v C135 1 161 327 00 CERAMIC 0 0033MF 30 16 C247 1 136 154 00 FILM 0 012 5 50 138 1 162 289 31 390PF 10 50 C248 1 130 478 00 MYLAR 0 0039 5 50v C139 1 124 927 11 ELECT 4 7MF 20 50 C249 1 130 471 00 MYLAR 0 001 5 507 C140 1 124 446 11 ELECT 47MF 20 10v C250 1 130 473 00 MYLAR 0 0015MF 5t 50V 141 1 123 875 91 ELECT 10MF 20 50 C251 1 130 478 00 MYLAR 0 0039MF 5 Sov C142 1 136 159 00 FILM 0 033MF 5t 50v C252 1 130 481 00 MYLAR 0 0068MF 5 508 143 1 136 153 00 FILM 0 01
22. EL2210W C 0207 8 719 302 74 DIODE SEL2210W C 0104 8 729 600 27 TRANSISTOR 2SC634SP 0301 8 719 940 76 DIODE 155132 0105 8 729 600 27 TRANSISTOR 25 6345 0106 8 729 600 27 TRANSISTOR 25 6345 0302 8 719 940 76 DIODE 155132 0401 8 719 200 77 DIODE 10E2N 0201 8 729 600 27 TRANSISTOR 2SC634SP 0402 8 719 200 77 DIODE 10 2 0202 8 729 806 38 TRANSISTOR 2503399 0203 8 729 806 38 TRANSISTOR 25 3399 0403 8 719 200 77 DIODE 10E2N 0404 8 719 200 77 DIODE 10E2N 0204 8 729 600 27 TRANSISTOR 2SC6345P 0405 8 719 933 33 DIODE HZS6A1L 0205 8 729 600 27 TRANSISTOR 25 6345 0206 8 729 600 27 TRANSISTOR 2SC634SP 0406 6 719 940 76 DIODE 155132 0407 8 719 940 76 DIODE 155132 0302 8 729 600 27 TRANSISTOR 25 6345 0409 8 719 940 76 DIODE 155132 0303 8 729 600 27 TRANSISTOR 25 6345 9304 8 729 281 54 TRANSISTOR 2SC18158L 0411 8 719 940 76 DIODE 155132 0412 8 719 940 76 DIODE 155132 0305 8 729 117 54 TRANSISTOR 25 1175 0414 8 719 940 76 DIODE 155132 0306 8 729 806 28 TRANSISTOR 2503402 0401 8 729 600 27 TRANSISTOR 25 6345 Ref No 0402 0403 0404 9405 0406 0407 0408 0409 0410 0411 0412 0413 R101 R102 106 8107 R109 R110 R113 R115 R116 8117 R118 R119 R127 R128 R129 R131 R134 R135 R137 R138 R139 R140 R141 R142 R143 R144 R145 R146 R147 R148 R149 R150 R151 R152 R153 R154 R155 R156 R157 R158 R159 R160 R161 R162 R163 ELECTRICAL PARTS
23. ONNECTOR 4P CN309 1 564 509 11 PLUG CONNECTOR 6P IC308 8 752 031 67 1100 CN310 1 564 505 11 PLUG CONNECTOR 2P 10309 8 759 601 43 4066 10401 8 759 601 10 IC M4011BP CN401 1 564 511 11 PLUG CONNECTOR BP CN402 1 564 511 21 PLUG CONNECTOR 16402 8 759 601 29 1 4030 CN406 1 562 067 00 SOCKET CONNECTOR 5P 16403 8 759 601 48 M4073BP CN408 1 564 505 21 PLUG CONNECTOR 2P 4301 1 507 908 11 AEP JACK PIN 4P LINE IN OFF CN409 1 562 067 00 US Canadian E SOCKET CONNECTOR SP L101 1 410 775 11 MICRO INDUCTOR 10 0101 8 719 303 00 DIODE SEL2510C 1102 1 410 775 11 MICRO INDUCTOR 10 0102 8 719 303 00 DIODE 5 12510 L103 1 410 780 11 MICRO INDUCTOR 27MMH 0103 8 719 303 00 DIODE SEL2510C 1201 1 410 775 11 MICRO INDUCTOR 10MMH 0104 8 719 303 00 DIODE SEL2510C 1202 1 410 775 11 MICRO INDUCTOR 10MMH 0105 8 719 302 74 DIODE SEL2210W C 1203 1 410 780 11 MICRO INDUCTOR 27MMH 0106 8 719 302 74 DIODE SEL2210w C LPF101 1 235 980 11 FILTER LOW PASS 0107 8 719 302 74 DIODE SEL2210W C LPF201 1 235 980 11 FILTER LOW PASS 0201 8 719 303 00 DIODE SEL2510C 0202 8 719 303 00 DIODE SEL2510C M901 X 3390 801 1 MOTOR ASSY M902 3390 801 1 MOTOR ASSY 8203 8 719 303 00 DIODE SEL2510C 0204 8 719 303 00 DIODE SEL2510C 0101 8 729 600 27 TRANSISTOR 25 6345 0205 8 719 302 74 DIODE SEL 210W C 0102 8 729 806 38 TRANSISTOR 25 3399 0103 8 729 806 38 TRANSISTOR 2503399 0206 8 719 302 74 DIODE S
24. Part No 8 729 500 27 8 729 107 26 8 729 117 54 8 729 117 54 8 729 111 67 8 729 806 20 8 729 806 20 8 729 159 01 8 729 806 20 8 729 806 20 8 729 806 38 8 729 806 38 1 249 417 11 1 249 435 11 1 249 441 11 1 249 433 11 1 249 417 11 1 247 849 00 1 249 428 11 1 249 417 11 1 249 417 11 1 249 423 11 1 249 429 11 1 249 429 11 1 249 429 11 1 249 421 11 1 249 430 11 1 249 421 11 1 215 446 00 1 249 435 11 1 215 440 00 1 249 441 11 1 249 433 11 1 249 441 11 1 249 441 11 1 249 425 11 1 249 425 11 1 215 479 00 1 249 404 00 1 215 472 00 1 247 849 00 1 249 421 11 1 249 429 11 1 249 430 11 1 215 479 00 1 249 404 00 1 215 472 00 1 247 849 00 1 249 417 11 1 249 441 11 1 247 887 00 1 249 431 11 1 247 887 00 1 249 427 11 1 249 421 11 1 247 887 00 1 215 466 00 Description TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARSON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON 2SC634SP 2501585 25 1175 25 1175 25B1094 L 25A1345 2541345 25 1348 2551345
25. be performed with the rated power supply voltage unless otherwise noted 5 The adjustments should be performed in the order given in this service manual As a general rule playback circuit adjustment should be com pleted before performing recording circuit adjust ment 6 The adjustments should be performed for both L CH and R CH Test tape Type Signal Used for 4 100 10kHz 10 dB Head Azimuth Adjustment WS 48A 3882 068 Tape Speed Adjustment P 4 L300 315Hz 0dB Playback Level Adjustment Switches and controls should be 561 as follows unless otherwise specified DOLBY NR switch OFF TAPE select switch NORMAL DECK B TC W255 SECTION 1 ADJUSTMENTS LINE IN OUT US Canadian and E model rear side of set 1 LINE IN L ch 2 LINE OUT L ch 3 GND 4 LINE OUT R ch 5 LINE IN R ch AEP model rear side of set Mode record AF OSC VTVM attenuator PEU 4 o 4 0 gt 6 LINE IN LINE OUT 315 Hz Standard Input Level LINE IN source impedance 10 input level 0 25 V 10 dB Standard Output Level LINE OUT load impedance 4786 0 44 V 5 dB output level 255 Record Playback Head Azimuth Adjustment PRAE Tape Speed Adjustment DECK A Procedure DECK B Procedure 1 Mode FWD playback Mode FWD playback
26. hods HIGH or NORMAL lights up according to DUBBING 1 A commercial leakage tester such as the SPEED setting 2 RCA WT 540A th M 2 210 E mor 3 PEAK LEVEL METERs Instructions to use insiru Show each 5 input level recording as well ments as the recorded levels playback When both decks 2 battery operated AC milliammeter The Data played back the meters show the level for deck A Precision 245 digital multimeter is suitable for this job 14 REC record indicator Lights up during recording on the deck B 3 Measuring the voltage drop across a resistor by means of a VOM or battery operated volt 8 Cassette holder deck B meter The limit indication is 0 75 V so analog meters must have an accurate low 8 COUNTER tape counter and RESET button deck B voltage scale The Simpson 250 and Sanwa Use the counter as a reference when searching for SH 63Trd are examples of a passive VOM that recorded materials To reset the counter to zero press is suitable Nearly all battery operated digital RESET multimeters that have a 2 V AC range are suitable See Fig A 7 TAPE DECK B selectors Select the tape type used on deck 8 Tape operation buttons To Exposed gt PLAY button Parts on Set REW rewind button FF fast forward button STOP EJECT button es
27. tocked since they are seldom required for routine service Some delay should be antici pated when ordering these items mm 19 00127 N gt gt 2 a gt Wc imu 4 13 model 0 Part 0 Description Remarks Part Description Remarks 1 3 703 710 41 STICKER SONY SYMBOL 12 13 7 682 148 01 SCREW BVTT 3X8 5 2 7 682 147 09 SCREW M3 CASE 14 7 685 146 14 SCREW P 3X8 NON SLIT 3 3 332 437 01 CASE 16 2 056 666 00 PURSE LOCK 8 DIA 5 gt 332 476 01 US Canadian E PLATE JACK 17 3 703 321 01 PURSE 10 DIA 16 3 332 478 11 PLATE JACK 18 3 683 631 01 CLAMP 19 3 703 978 01 US LABEL A FIRE CAUTION 6 3 332 438 01 CHASSIS 7 3 576 731 00 FELT 901 2056 361 US Canadlan E MOUNTEO AUDIO 8 3 332 430 01 PLATE BOTTOM A 2056 362 A MOUNTED PCB AUDIO 9 4 303 475 00 HOLDER PC BOARD 10 3 332 428 01 BRACKET 1 PC BOARD 403 8 729 107 26 TRANSISTOR 2501585 12 3 701 030 00 LABEL SERIAL NUMBER 0406 8 729 111 67 TRANSISTOR 2581094 L _Te w255 2 57 fincluding 7 Part Description Remarks No Part No Description Remarks 51 4 919 316 61 LID B CASSETTE 61 3 530 181 BELT DETCTING 52 4 919 316 51 110 A CASSETTE 63 3 318 909 11 KNOB PUSH 53 3 332 492 01 PLATE ORNAMENTAL 64 4 864 307 00 RING 54 3 332 489 01 PLAT
28. vice Some delay should be antici RESISTORS pated when ordering these items All resistors are in ohms 1f there are two or more same circuitsin F nonflammable set such as stereophonic machine only COILS typical circuit parts may be indicated and MMH mH uH capacitors and resistors other same circuits may be omitted SEMICONDUCTORS In each case U for example UA uA UPA uPA UPC UPD UPD ELECTRICAL PARTS ELECTRICAL PARTS Ref No Part No Description Ref No Part Description 901 A 2056 361 A US Canadian MOUNTED PCB AUDIO 209 1 136 157 00 FILM 0 022 5t 50v A 2056 362 A MOUNTED PCB AUDIO C210 1 124 767 00 ELECT 2 2MF 20 50V C214 1 124 925 11 ELECT 2 2MF 20 50v 902 1 548 596 21 COUNTER TAPE MIODLE TYPE 1 C217 1 124 767 00 ELECT 2 2MF 20 50 C103 1 124 925 11 ELECT 2 2MF 20 50 C218 1 136 175 00 FILM 0 68MF 5t 50v 6104 1 124 925 11 ELECT 2 2MF 20 50Y C227 1 124 925 11 ELECT 2 2 20 50V C105 1 124 791 11 ELECT 1MF 20 50 228 1 136 440 11 FILM 39PF 55 630 C106 1 124 925 11 ELECT 2 2MF 20 50 C229 1 162 290 31 CERAMIC 470 105 50 43 C107 1 162 290 31 CERAMIC 470PF 10 50 C230 1 162 282 31 CERAMIC 100 10 50 3 C108 1 162 282 31 CERAMIC 100PF 1 508 6231 1 136 157 00 FILM 0 022MF 5 50 C109 1 136 157 00 FILM 0 022 5 50 C232 1 162 284 31 CERAMIC 150PF 10 50 C110 1 124 767 00 EL
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