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Service Manual

1. mall mm om Eon EL R463 ERD25TJ101 R645 ERD251J272 8818 ERD25TJ154 VR906 907 ERD25T272 R464 ERD257J473 8646 ERD25TJ103 R819 ERD25TJ153 ERD25TJ682 EVNK4AA00B14 C211 212 R465 ERD25TJ562 R647 ERGI2ANJI8 R955 956 ECQMOS823KZ ERD25TI331 R466 467 R648 ERD25T272 ERO25CKF1001 SAPACITORS ERD25TJ101 si ERGIANJATI 957 958 C1 2 EcQsiasigz 213 214 ERD25T 102 raga ERGI2ANJ562 8649 ERD257473 4801 ERXIANURA ERD2STJI22 C34 0051101 2 JEGQMOSZZAKZ R650 651 0540 65 6 ECKDINIO2K 215 216 R469 ERGI2ANJ153 08 ERD25T472 025 8202 7 8 0 5221 ECQM05473KZ ERO25TJ683 R470 471 For All European areas R961 962 C9 10 470 9217 218 R355 356 ERD25T 473 8661 ERD25TJ473 ERO2SCKF1502 11 12 5101 ECQMO5273K7 25 474 R472 ERD25TJ153 R662 ERD251 101 Fe T ics d 2 963 964 13 1
2. me ee mm ww C631 632 2802 B4BC0802 0552 254719 ECEAIHS100 12803 0 80011 0553 254564 Q554 25 719 T1 BJAjQLPD3SENX AC Power Transformer C633 ECEAIHSO10 TRANSISTORS 9555 254564 For All European areas except United Kingdom C662 663 664 665 Q3 4 2901327 Q556 557 SM112 For United Kingdom and Australia ECFWD104MXY Q5 6 25 721 25 719 04902 1310 311 666 ECKD1H103z7 197 8 2561327 0601 602 603 SM102 QLT2D26X Headphones Transformer C701 702 703 Q9 10 11 2561317 LN16BP T851 0180191 Oscillation Transformer ECEA2523R3 25 1684 0605 2501846 1432 1852 0180190 RF Qutput Transformer C704 502847 10101 25 564 0606 25 1383 161 C705 706 707 Q102 103 104 0607 608 609 610 611 MA1120 cors ECEASOZR22 2501327 25 1684 1075 12 QLQX3441K Choke 708 0 05103 2 0105 106 107 108 109 110 0612 25 886 0801 802 803 804 L201 202 203 204 205 206 207 208 C709 ECOM05473KZ 2561684 0613 2501684 A 5 102 QLQX0331W Peaking Coil 2SK30AD Q615 616 LA RVDIODC2 Australia C712 EcrwD1o4mxy Q113 114 2501684 0807 808 L301 302 713 E EAZEZJOO 25 1684 0617 25719 RVDIODC2R QLM9Z3K MPX Filter C714 ECQMOS393KZ L601 602 715 05683 2 0115 er E zi MUS QLQZ1014D Choke Coil C716 104 2 Q6 SA719 L801 010210140 717 0 05103 2 9117 118 119
3. R1037 15K R1038 15K Gi e 3 ag 758573 E ee Bt eegen mes E 1 Q A 22dB ADJ Die pe RIGHT SIGNAL C 6 8K 50V2 uc SIGNAL_HIGH 7 Q A 7 J 25V2 2 15V 4 RIGHT SIGNAL LOW x H H 525 gi Z d S 52 m NEUE T L 596415477 C1002 101003 DN6838 0 6838 au 1 909 UPC4558C 2 5 ej EE EE 7506 R939 R94 1K 22K 1VR9071VR906l 10K 2K VR905 500 R975 7 390 R965 10K e Q901 910 68k az KI 2SC2021 R S 97 390 8903 500 976 10K 0911 914 3 2SB641 S T 8966 12K IC906 8214 4 7K UPC4558C 0904 DOLBV B D902 182473 Glo DEE am i R SIGNAL HHH R926 22K 152473 MUTE R934 IK R932 R916 22K R924 7K 152473 R982 IK 990 gt 0905 10K 25V4 7 R991 ki R983 IK 56K 0919 0918 co wo e 0 25 2021 8 5 4 980 28981 ld 5 oo man 2SB641 S T AK 9 152473 TENE 25 945 oco A R978 pa R985 IK PN 2SC2021 R S DSP KIESCH CAN JR K O Deh MORE il _ 0913 152473 R986 IK ELT s ae ae 99 RD rau IT m A O 7 10 47 10 47 i
4. 1 4 O R CH R386 MPX FILTER 10K A dE B pere MR r ill 25 945 LI RECORD Tos ib a Q853 854 Q851 852 BREST HEAD 00012 BG LEAKJILI 2SC2021 250638 9009000 Q weer b 855 Lun T O O ADM RECORO VRB54 HEAD 20K x fi TOP CET Ze NI E R860 20K 1 Q C865 100P ERASE oP scot TT le UN 0228 ma MC Cx eS ee 25 641 mE ii 1 se ere 4 2SC2021 9 VRZ ee Test oscillator level adjustment VR at 400 Hz 20 VR303 304 Record calibration control 31 L207 208 Record equalizer adjustment coil for normal tape 10 VRIO enm Playback gain adjustment VR 21 05 Output Iqvel control 32 L851 852 Bias leakage adjustment coil 11 102 Record gain adjustment VR 22 07 Bias current adjustment control for normal tape 33 resistance show for Australia E LTER IN IN 12 VR103 105 Decoder Plavback DOLBV adjustment VR 23 VR3OB e Bias current adjustment control for Fe Cr tape 34 Resistance are in ohms 0 1 4 watt unless specified otherwise 13 VR104 106 Encoder Record DOLBY adjustment VR 24 09 Bias current adjustment
5. P va R261 220K 227 25V47 0324 1 1 S eg e 58 20K 00690 032 RAS E U 25 2 O 3 aK Q Q e O 0102 104 Q106 108 110 119 Q114 118 O JVVS 2SD661 2SC2021 2SK30AD 25 2021 25 641 OOOOO RCH MIC A a Eelere ee O Ges 302 3 1 15 1V R69 2 2K VR301 2 lt lt i joke Y S 43 2 89 ua NA l AS a L 0000 ore H cen 21 o Ren 1 ENCODER cas 8396 MPX FILTER 0022 0022 e 25 4 ___ 68K 8 A n i i 9 3 3K Q225 226 230 C44 R C56 2SC945 Q218 Eus RECORD MES p 0853 854 0851 852 7A227229 226 230 perm R66 Ven Towi BIAS LEAK 25 2021 250638 lt 25 2021 AE 00056 0 001 00012 ka BIAS LEAKJIR R855 0201 x Se Em 152473 C866 3 3 5 R54 R56 E i 820 1 2 56K 2 68 RECORO VR854 HEAD 20K C866 L 2 863 885 ue l 5 25 2021 254 74 R860 0 leg vp d FI T 2227 dess aran A ERASE Dy 000 wor 1l ls SES 0228 0326 Q551 553 555 KM c DC mM MM M a ERE M RNC uM aM MU CM UM 2SB641 2SC2021 258641 T LLI A b 10 a 0552 554 556 557 258643 lo lo Jo J t
6. n CONNECTOR CIRCUIT BOARD 987654321 987654321 CIRCUIT BOARD MICRO COMPUTER CIRCUIT BOARD 27 1234567890112345 e METER FUNCTION SELECTOR CIRCUIT BOARD For All European areas eiu E iun A 5802 VOLTAGE 3 SELECT SWITCH LI gt BRN ORG RED a U ch T1 POWER TRANSFORMER RED SUB POWER CIRCUIT BOARD AC POWER CORD WHT amp GRY B RED BLU E 5801 POWER ON OFF SWITCH FUSE CIRCUIT BOARD MAIN CONTROL CIRCUIT BOARD S CONTROL SEH CONNECTOR CAPSTAN MC CIRCUIT BOA 11098 765432 RS M95 RS M95 123456789 123456789 654321 TO POWER SUPPLY RI Sq 4 TO SELECTION HI TO FL METER CIRCUIT BOARD CIRCUIT BOARD umi CIRCUIT BOARD INPUT LEVEL BLU BRN CIRCUIT BOARD GRY BLU MIC JACK CIRCUIT BOARD GRV BIAS ADJUSTMENT CONTROL CIRCUIT BOARD DOLBY NR CIRCUIT BOARD L ch PLAYBACK EQUALIZER TEST OSCILLATOR MIC AMP CIRCUIT BOARD ASSIS DOLBY NR CIRCUIT BOARD R ch TAPE SELECT CIRCUIT BOARD PL554 PILOT LAMP mE NOTE BLK Black PL553 PILOT LAMP 2 BRN Brown _ WHT GRY Gray PL552 PILOT LAMP GRN
7. 9 Overall distortion Test equipment connection is shown in fig 32 Equipment Set the monitor selector to source position Supply 315 Hz signal to LINE IN and adjust AT T so that output Distortion meter Ik level at LINE OUT indicates 0 65 V AF Oscillator AF oscillator Change the monitor selector to tape position oe LINE QUT Oscilloscope Press the record and playback buttons and measure distortion Test tape QZZCRA factor of tape monitor output signal EL EUM Ness E reference blank tape ina p A ig RS M95 ITEM MEASUREMENT amp ADJUSTMENT Overall frequency response Equipment AF oscillator Test tape reference blank tape QZZCRA for Normal QZZCRX for CrO QZZCRY for Fer QZZORZ for Metal Adjustment 1 Adjustment 2 6 When the distortion factor does not satisfy the standard check the bias current When the bias current is lower than standard distortion will increase Care should be exercised in the adjustment because the bias current also has an influence on the overall frequency response response and The bias current adjustment Refer to The overall frequency Standard value Less than 2 5 Note Before measuring and adjusting make sure 2 of the playback frequency response For method of measurement please refer PM to the playback frequency response Overall fr
8. mm mn ee amme gt PN R To Power Section D631 gt SS O 7R644 0628 180 T Q617 For All European 0618 620 25 2021 T TIMER PLAV T B R647 0629 180 Y2W 0 IMER COM IAS REC MUT To Main TAPE Amplifier LINE MUT Q621 622 601 M53200P 2SB641 SOURCE MONI Q623 627 2SC2021 0622 STROBO LED RUE Seat BEES ROI Heic hic ee en RE E einen Lo E OMMI R646 10K 1800 20 NOTE 1 5401 Rewind button switch 8 5601 Cassette detection switch 2 402 Fast forward button switch 9 5602 Accidental erase prevention switch 3 5403 Plavback button switch 10 603 Monitor select switch 4 5404 Pause button switch 11 6 1 Plavback tape tension adjustment VR 5 405 Record button switch 12 Resistance are in ohms Q 1 4 watt unless specified otherwise 6 S4OG Stop button switch lt 1 0000 7 5407 Record muting switch 13 Capacitv are in microfarads uF unless specified otherwise P Pico farads ME q Fej Relationship of each operation mode with input output Output terminal Operation mode input Terminal 12
9. 428 EEA1HS100 R621 ERD25TJ102 JRBIL ERD25TJ824 ECEASOMRIR RAT AB o nnus 8602 EROZBTI2R2 BB ERQI2HJIB0 940 EVHFSA067853 141 142 SO R449 H R632 634 All European areas ERD25TJ102 VR601 00814 ECEASOMR33R ERD25TJ473 Wi ERGI2ANJI80 VR701 702 Ett 1 5470 R4 i ERD25TJ473 i R941 942 C143 144 50 ERD25TJ103 ER x For Australi i EVNK4AA00B53 C431 EK D 1H472KB R635 25 682 or Australia ERD2571223 ECEASOMRIR 451 453 R636 ERD25TJ153 8812 ERD25T 821 mga3 944 VR703 EVNK4AA00B52 201 202 SES ERD25TJ473 813 ERD257J332 VR801 EVNK4AA00B53 C551 552 553 5 4 R454 R637 ERGIANJ271 ERD25TJ224 ECEA1HS100 ERDISTI273 R814 ERD25TJ153 VR851 852 ECA 1ES4R7 R455 P638 eren P59 EVNKAAAQ0B24 2203 204 Cent JECA 195010 9 ECEA1JS330 R4 ERD25TJ102 ERDST 473 5 682 8816 ERD25TI472 VRB53 854 C205 206 Mex XE on R457 ERpoTJ472 8040 ERD2STJISS 817 R947 948 949 950 ECQMOS22IKZ 905 606 6070 R460 R642 ERD251J562 European areas 952 VR902 EVNK4AA00BS3 ECQMO5473KZ ERDISTI394 951 95 VR903 904 905 R461 5 1 8643 ERD25T 103 M ERGIANJI21 ERD25TJ102 E C209 210 R462 R644 ERGI2ANJIBI For Australia EVNK4AAO0B52 ECQM05223KZ 18 ERD257J334
10. Ca G A A 6 Yow FA 8 8 gt NEE ORE IS _ T 0707 2SC1318 Q RS R707 R708 1 8K lt gt S A fen 0705 3B 3A a 2 0 00 19 19 CS OSC PCOM GND PI 3 8737 8738 R739 Lu RI36S ISk 39 SE 725 734 0 0018 00033 19 FG PROG CS IC 702 660 FO 572 SH2 VCC Al 6714 28728 0 039 18K R719 10 Yow IC701 AN640F ANI AN2 AN3 Ui R718 10K R71 10 Q701 703 2SC1846 Q R Q704 706 2SA885 Q R Terminal No IC702 16 mE around 1702 8v Ir3 14 around UV rz IC702 ll IC702 9 Terminal Measured Wave Form atound FG signal Crystal signal around 6V gt around gt MI Q 20v C QUARTZ O No around 6 7 jAl 8 c around Mi BLOCK DIAGRAM CAPSTAN MOTOR SECTION 12V C726 f VR702 2AVR703 4 723 R736 C734 C727 R739 R735 E 13 di Constant current circuit aD 3 9 2 Wave form rectifier circuit B P F 16 FG coil OQ 2009000 circuit Torque Saw tooth Sample instruction l
11. EE 4 PA ON 221 2220232 A 2SC2021 NOTE 1 5301 1 5301 6 select switch shown in position 9 Test oscillator level adjustment VR at 400 2 20 VR303 304 Record calibration control 31 L207 208 Record equalizer adjustment coil for normal tape 1 MIC 2 LINE 3 400Hz 4 400Hz 8kHz 10 101 Playback gain adjustment VR 21 05 Output level control 32 1851 852 Bias leakage adjustment coil 2 302 1 302 4 Dolby NR select switch shown in out position 11 102 eee Record gain adjustment VR 22 07 Bias current adjustment control for normal tape 33 resistance show for Australia 1 FILTER OUT OUT 2 FILTER OUT IN 3 FILTER IN IN 12 VR103 105 Decoder Playback DOLBY adjustment VR 23 08 Bias current adjustment control for Fe Cr tape 34 Resistance are in ohms 0 1 4 watt unless specified otherwise 3 5303 Timer select switch shown in position 13 VR104 106 Encoder Record DOLBY adjustment VR 24 9 ee Bias current adjustment control for CrO2 tape 1 0000 1 PLAY 2 OFF 3 RECORD 14 201 Erase current adjustment at metal position 25 10 Bias current adjustment control for metal tape 35 Capacity are in microfarads uF unless specified otherwise 4 5551
12. Green WHT L BLU Light Blue NIL No Color Mark Orange GRY PNK Pink RED Red OARD Th SLD Shield Wire E VLT Violet BLU PL551 PILOT LAMP l YEL Yellow HEADPHONES JACK CIRCUIT BOARD RECORDING CALIBRATION CIRCUIT BOARD 28 RS M95 He Moar WIRING CONNECTION DIAGRAM Amp Section 123456789 123456789 TO POWER SUPPLY Ld J JTO SELECTION CIRCUIT BOARD CIRCUIT BOARD WHT BLL BIAS OSCILLATION CIRCUIT BOARD MIC JACK CIRCUIT BOARD 123456789 DOLBY NR CIRCUIT BOARD L ch ERASE HEAD PLAYBACK EQUALIZER TEST OSCILLATOR MIC AMP CIRCUIT BOARD e GRY BRN L BLU TO CHASSIS COMBINATION HEAD RECORD AND PLAYBACK DOLBY NR CIRCUIT BOARD R ch RECORD AMP CIRCUIT BOARD OARD HEADPHONES JACK CIRCUIT BOARD WHT PNK Idler Lever Assembly Idler Felt Idler Assembly Idler Spring Brake Lever Assembly Brake Stopper Rubber Detection Angle Assembly Detection Lever Spring Detection Lever Lever A Assembly Angle L Assembly Link Lever A Assembly Link Lever B Assembly Holder Angle L Assembly Cassette Holder L M40 M41 BB For United M42 For All Eur QMA3311 Part No Part Name amp Description 0 0705 Holder Angle R Assem
13. LINE Test Tape Equipment 5 Using test tape make recording AF oscillator 6 Then measure the tape monitor output level at LINE OUT on Playback ES x Oscilloscope Standard value 0 65 0 05 Test Tape VIVM Oscillsscope lest tape Fig 26 reference blank tape QZZCRA for Normal If measured value is not within standard adjust VR102 ITEM MEASUREMENT 8 ADJUSTMENT Fluorescent level 1 Test equipment connection is shown in fig 26 meter 2 Set the monitor switch to the source position Condition 3 Supply 1 kHz signal 24 3dB to the LINE IN jack 4 Adjust the ATT so that the source monitor output level of left channel becomes 0 65 V Record mod yen The attenuation of ATT at that point is the standard input level Peak VU selector Peak position A Adjustment of 20 dB indication Left channel indication Equipment 5 Attenuate ATT by 204 from the EN T standard input level l met oscilator Then the source monitor output 40 e 30 s 20 W 530000 o 004 8 MATT level is 0 065 V a 0000000000000 6 Turn VR903 clockwise completely Fig 27 7 Next slowly turn VR903 counter clockwise until the 18 dB indication on the meter goes out B Adjustment of OdB indication Left channel indication 8 Set the ATT to the standard level Then the source monitor output ini tara be
14. ka 5801 POWER ON OFF lo SWITCH L POWER SUPPLV REMOTE CONTROL BOARD Dr CONNECTOR 23 METER FUNCTION od SELECTOR e mm we CIRCUIT BOARD CAPSTAN MOTOR CIRCUIT BOARD ORESCENT LEVEL METER RCUIT BOARD lt lt 2 I9 e BRN 429 M _ _ _ 2 adl o ERR BRN L RED l 1 POWER TRANSFORMER PL8O1 PILOT LAMP 5802 AC VOLTAGE SELECT SWITCH RED ORG BRN WHT L BLU Light Blue NIL No Color Mark ORG Orange PNK Pink RED Red SLD Shield Wire Violet White YEL Vellow 4PIN TERMINAL S801 POWER ON OFF SWITCH AC POWER CORD a e WIRING CONNECTION DIAGRAM Controls Section OPERATION SWITCH CIRCUIT BOA MONITOR SELECT CIRCUIT BOARD LED MONITOR INDICATOR CIRCUIT BOARD PL404 PILOT LAMP WHT PL402 PILOT LAMP REEL MOTOR PLUNGER MONITOR SELECTION CIRCUIT BOARD PL403 PILOT LAMP WHT QUARTZ STROBO CIRCUIT BOARD 5601 CASSETTE PL401 PILOT LAMP DETECTION 5602 WHT SWITCH ACCIDENTAL la ERASE PREVENTION SWITCH REEL MOTOR PRESSURE ROLLER PLUNGER 033 980 134 L BL FLUORESCENT LEVEL METER DIGITAL TAPE COUNTER CIRCUIT BOARD CIRCUIT BOARD
15. ERD25TJ563 aaa 511103 00 24 ECQM05472J2 0409 EKD1H103ZF R431 ERD257J153 ERD25TJ221 802 BI ERGI2ANJI20 Gegen C125 126 C410 EIEA1HS100 R433 434 R601 ERD25TJ2R2 Australia 00 14 ECEA1HS100 EEA1HSO10 ERD251J473 R803 925 926 R435 ERDISTIS62 DE ERQIZHJISO ERD251J223 EVNKOAA0OB52 ECEASOMRIR 1 5 100 R436 ERDJSTJI03 peoe rmposrpoo All European areas VR201 202 203 129 130 EEA 1HSO10 R437 5 073 ERD251 397 150 8927 928 EVNKOAA00B53 1 470 R438 ERDJSTJI83 peng eRpostion Australia eee ERD25TJ153 yg204 2 C131 132 EEA 1HS100 R439 ERD25TJ681 R804 ERXIANJ2R2 929 930 VR301 EWKNXAF25A24 ECEASOMRIR 6416 EK D1H103ZF R612 ERD25TJ562 Rags ERD25TJ103 ERD25TJ334 C133 134 R440 ERD25TJ153 R613 614 VR302 67 24 C418 EE AT6N10 RAA1 442 R806 ERD25TJ102 R931 932 ECEA1HS100 422 A 1HS471 ERD 5TJ562 R807 ERD25TJ101 ERD25T 154 Ivp303 304 C423 JEKDIHIO3ZF R443 ERD257J473 EVHS7AS20B24 13S 1 004 EEANAS470 enpoergeng 809 5802512103 ee VR305 EWKHIAQ33A14 0JS221 5324 ERD 5TJ103 ERD25TJ152 TM PHA TAS Vesper R445 ERDJSTJ331 pera capostiest RB O ERD25TJ562 ERD251331 EVHFSA067B23 032 R446 ERD 51J153 Ge R937 938 VR309 310
16. Service Manual ORDER NO ARD 7907059C Cassette Deck RS M95 Black Face Quartz Phase Locked Direct Drive Cassette Deck with Microprocessor Tape Tention Control New 3 Head Svstem LX covey system Professional Series RS M85 MECHANISM SERIES Specifications Track system 4 track 2 channel stereo recording and playback Inputs Tape speed 4 8 5 Wow and flutter 0 03 WRMS 0 09 DIN Frequency response Metal tape 20 20 000 Hz Outputs 20 20 000 Hz DIN 20 20 000H2 3dB OVU 20 13 000 2 3dB CrO2 Fe Cr tape 20 20 000 Hz Bias frequency 20 19 000 Hz DIN Motor 20 19 000Hz Normal tape 20 18 000 Hz 20 17 000 Hz DIN 20 17 000Hz 3dB Heads Signal to noise ratio Dolby NR in 70dB above 5 kHz Dolby NR out 60dB signal level max recording level Fe Cr CrO2 Power requirements type tape Power consumption Fast forward and Dimensions rewind time Approx 80 seconds with C 60 cassette tape Weight Specifications are subject to change without notice This is the Service Manual for the following areas B ise For All European areas except United Kingdom For United Kingdom I aC P C es reine V MIC sensitivity 0 25 mV input impedance applicable microphone impedance 4 O0Q 10k LINE sensitivity 60 mV input impedance 60 kQ LINE output level 650 outpu impedance 6kQ or less load impedance 2Ck 2 o
17. Tape select switch for normal 15 202 Bias current adjustment VR at Fe Cr position 26 VR851 852 Bias wave form correction VR at metal position P Pico farads 5 5552 Tape select switch for Fe Cr 16 203 Bias current adjustment VR at CrO2 position 27 VR853 854 Bias current adjustment VR at normal position 36 All voltage values shown in circuitry are under no signal condition 6 5553 Tape select switch for 2 17 204 Bias current adjustment at Metal position 28 1201 202 Record equalizer adjustment coil for CrO2 tape with volume control at minimum position 17 7 5554 Tape select switch for metal 18 01 Input level control 29 L203 204 Record equalizer adjustment coil for Fe Cr tape 8 1 2 Playback equallzer adjustment VR at 400 Hz 19 02 Meter light control 30 L205 206 Record equalizer adjustment coil for metal tape NOTE A indicates that only parts specified by the manufacturer be used for sefety
18. 553 554 ECEASOMR22R 307 308 309 310 Q1002 2961684 XAMQ34S200W 7 2581684 DIODES amp P ae DIODES amp L801 415500 Pilot Lamp C865 866 D101 102 ECQS1121J2 Q313 314 OASOM C867 868 2501684 D103 104 ECQF6122KZH MA1082 C901 902 Q315 316 D105 106 107 108 109 110 ECEA1HS100 25 564 161 C903 904 Q317 318 319 320 321 322 D111 112 ECEA25N3R3 25 1684 0 90 C905 ECEALES4R7 25 564 0201 152473 907 908 25 1846 0202 1056 ECEAIES4R7 D203 161 909 910 2561684 0301 1190 ECCDIH100KC 09401 402 403 0302 303 304 911 912 25 719 150 ECEAJES4R7 Q404 405 406 407 408 409 D305 OA90Z C913 914 410 411 412 413 414 415 ECEAIAS470 416 417 418 D306 MA161 2561684 C915 0 05473 2 9419 25 719 NS C916 917 0420 421 422 423 424 425 0409 410 ECSZ25EF2R2 426 427 428 429 161 25C1684 C918 919 0412 161 ECKD1H682KB 25A564 D416 MA1051 C1001 1002 D417 5 112 ECEA1HS2R2 0418 MV121 C1003 ECCD1H101KC 25 1684 D419 420 421 422 C1004 ECKD1H102KB 25 564 161 1005 ECEA1HS2R2 2601684 0423 0 902 4 0424 121 COMBINATION CS 5 2681684 0551 552 19 2801 QCROO11 2SA564 MAI6I RS M95 RS M95 BIAS OSCILLATION CIRCUIT BOARD jen 0851 0852 Y 2SD638 2SD638 BIAS LEAK L BIAS LEAK CUR R rom NAM 853 2SC202 PLAVBA
19. 13 14 17 19 20 22 23 PAUSE PLAY REC D PLAY STOP TMS FF OUT REW OUT OUT OUT OUT OUT OUT OUT el e eo o o o o e 9 FF IN FWD IN e PAUSE PASIN STOP STOP IN see eee ee eee am Ee rr lt lt c D Mdb PL RS M95 21 SCHEMATIC DIAGRAM Main Control Section R i ee 71 Q601 603 0605 0607 609 2SD638 2SC1846 25 2021 REEL MOTOR DRIVE 1C402 404 0408 418 M53200P 25 2021 E 4 SET 3 PLAY IN IC401 AN6251 REW IN STOP IN REW OUT 545 9 Ge To Tape R401 5 6K 1 D Sw Counter FF OUT 8 REW Section 5 FF 5402 5 PLAV 1 1 COUNTER MUT 403 2 QUARTZ OUT 5 5 0606 T 5 250592 ee f 3 REC INH lt 0613 0614 2 HALF SENSOR EP em GE 2 sow G GC Te ew o d d Q401 403 2SB643 Q 69 0 401 REC PL 402 PAUSE Q PL 403 PLAV Q N ey T TETTE 4 ial p up u 5 0407 8454 a 0420 426 25 2021 MAISO 27K mENE PREC MUT iii E T TIMER REC PLAY PLUNGER Ei haan hes ee uer pe Q404 407 2SC2021 R644 770628 180 m Q617
20. Controls Cover Snap Washer Screw 3x6 Screw 8 Screw 4 8 Tapping Screw 4 8 Cassette Lid Holding Plate Screw Push Button C Tapping Screw 43 x6 Snap Washer ACCESSORIES Connection Cord Demonstration Tape Instruction Book All European areas except United Kingdom BIA QQT2631 7 United Kingdom and Australia 1 QPN3882 P2 QPA0476 P3 QPA0477 P4 XZB50X65A04 PACKINGS Inside Carton Cushion A LEFT Cushion B RIGHT Poly Bag 26 RS M95 RS M95 CIRCUIT BOARD POWER SECTION SUB POWER CIRCUIT BOARD 0801 Q808 CABINET PARTS 0811 0802 0809 0810 25 1846 25 2021 250638 25 1684 9 3v DES For All n Meer PE E oium uti e Dese ee Sa EN SE European areas q812 Q806 0803 PM 2SB641 2SB641 2SA886 2SC2021 The circuit shown in red on the conductor is B bias circuit 16 2 8 2V Vaiues indicated in DC voltage between the chassis and electrical parts For All European areas OPERATION SWITCH TEN L ___ CIRCUIT BOARD 5802 AC VOLTAGE SELECT SWITCH ORG BRN L T1 POWER TRANSFORMER 123456789 MB SUB POWER FUSE CIRCUIT BOARD CIRCUIT BOARD 7803 NT d HHH seww 887 GRY 1 POWER Ns du CORD e B 1224567 345 U
21. Part 0 0010 070127 QML127 QMA364 070116 QBC123 QBC122 QBT161 XSS241 XSN2 4 XNF26Al QBK700
22. R369 370 A ERD25TJ270 ERD251J331 Stu All European areas ERD25TJ101 ERD25T 472 For Australia R677 ERD251J473 ERD25TJ272 0 05682 7 R371 372 R487 ERD25T 102 eeng Capzeug Australia ERD257J473 eet E ERD25TJego 888 0251 53 R679 680 R828 ERX2ANJGR7 ERD251J102 DB ECEAIES330 R489 ERD25TJ471 8829 ERGI ANJ331 C45 JECQMOS223KZ For All European areas R373 374 R490 ERD257J473 ERD25TJ472 ERD251J153 C46 ECQMOS122KZ ECEA25Z4R7 ERD25TJ102 R49 ERD25TJ471 R681 ERD25TJ681 C47 ECQM05223KZ For Australia R701 ERD251J560 R830 ERD25T 222 R984 985 986 R375 376 R492 ERD25TJ392 R851 852 ERD25TJ102 C48 ECQM05122KZ C236 j ICEA2574R7 ERD251J332 i C49 ECCD1H331K Australia 377 378 R493 ERD25T123 Lee ERD251 103 ERD257393 8987 ERD25TJ223 TERO251 222 R703 ERD2ST R853 854 ROB8 ERD251 563 050 ECCDIH330K 0237 1 101 R379 380 R494 ERD25TJ472 04 DD OM ERGI2ANJe80 R989 ERD25TJ222 2 ECEAlAS470 0238 252487 ERD 5T 224 R495 ERD257473 R705 gmpgspjsgo European areas R990 ERD25T I03 17 EVEATHSIOU 10039 ECEA1VS330 R381 382 R496 ERD2STJIO2 R706 707 708 709 ERGI2ANJS60 R991 ERD251J562 Jee i ERD25TJ152 8497 JERDZSTJIO4 120251103 Australia R992 ERD257J473 Se ECCDIH101K R498 ERD25TJ153 C54 ECEA1HS100 0302 tCEA1HS470 R383 ERD25TJ472 R710 711 712 71
23. V For All European AI R647 0629 180 IVAW 992 LM 59 0618 620 I Go meng 29020 2 TIMER REC Pes 1 5 lt p Epirum we C com E AS 2 5407 _ RECMUT MA ine mur CS TAPE E 0621 622 2 NE MUT 8 8 2SB641 4 SOURCE MONI Hr 0424 R508 10v47 429 L R514 SEES LI HrhH R513 820 Q427 429 437 Q430 0431 432 436 ae 25 2021 258641 25 2021 258641 0434 25 2021 0435 25 564 58 4 e i I MN ase EEA Lu c ra 0427 0623 627 25 2021 0428 0429 0430 03 1405 M53273 435 D622 STROBO LED gt e ES N gt gt 5 gt gt PLUNGER PLUNGER REEL MOTOR To Power Section HEAD PINCH ROLLER E SMS A RMO NE d HPL HALF SENSOR amp REC INH 5601 HALF SW Without Half 5602 REC INHIBIT SW Non Re C c 23 SCHEMA
24. amp ADJUSTMENT 20V adjustment Connect voltmeter to the test point 20V on the power circuit board and read voltage Standard value 20 0 5V f measured value is not in standard adjust VR8O1 as shown in fig 37 Capstan gauge in direction opposite to pressure of pressure against capstan See fig 8 Read pressure indicated on gauge immediately when pressure roller moves away from capstan and stops rotating Standard value 400 30 gr Pressure roller Fig 8 Mount cassette torque meter on UNIT Place UNIT into playback mode Measure the takeup torque within 15 seconds after starting the playback mode If measured value is not within standard adjust VR6OI and 12 so that the tape may not get curled or malformed Test tape Playback mode M by tape guides of the erase head and the combination head Fig 9 fig 11 shows correct condition Note For the combination head carefulley adjust the height so that the head surface contacts the tape in parallel shown in fig 12 Playback the azimuth tape QZZCFM 8kHz Adjust the combination head angle adjustment screw C in fig 10 so that the output level at LINE OUT becomes maximum Measure both channels and adjust levels for equal output After adjustment lock the head adjustment screws with lacquer Combination head Erase head Combination head 00 Tape Guide Tape Guide
25. brightness control 2 Output level control Input level controls Memory 1 reset clear button Memory 1 stop play button 0 Memory 2 set recall button Q2 Memorv 2 clear button Q3 Record button and record indication lamp Rewind button 09 Stop button 6 Playback button and playback indication lamp 07 Fast forward button Pause button and pause indication lamp 09 Record muting button and muting indication lamp 80 Tape selectors and tape indication lamps OD Monitor selector and LED monitor indicator 82 Line output connection jacks 83 Line input connection jacks Remote control connector 85 Voltage selector DISASSEMBLY INSTRUCTIONS Procedure To remove Remove Case COVer E 4 black SCrEWS EE 3 Front panel 8 ew 9 red SCleWS B 4 e 10 control knobs OO A TA D 3 SCHOWS i E D 6 black SCKOWS en F e 8 black SC EWS nn G 4 black SCIEWS ie H 6 SCKOWS ie 2 counter holders 24 J A Screws eee eee ee eee eee eee eee ee a CIRCUIT BOARDS LOCATION REEL MOTOR PLUNGER MONITOR SELECTION BIAS OSCILLATION CIRCUIT BOARD CIRCUIT BOARD RECORD AMP SUB POWER CIRCUIT BOARD CIRCUIT BOARD DOLBY NR CIRCUIT BOARD RIGHT CHANNEL DOLBY NR CIRCUIT BOARD LEFT CHANNEL PLAYBACK EQ TEST OSC MIC AMP CIRCUIT BOARD FL LEVE
26. input e Reads in 0 94 Hz signal about 1sec interval from strobo il lumination divider circuit to use it as the reference interval for take up tension control 1 06 9 BI2 B port input With memory switch 51003 or 51004 pressed it reads in scan signal from terminal 5 or 6 to check the status of control of 51003 and S1004 0 3ms 4 1 8 gt 15 With 51003 pressed OV 0 3ms k 1 8ms l 15V With S1004 pressed 0 With memory switches 51001 51002 pressed it reads in B signal Terminal QU input 51002 switch pressing time Terminal 0 input S1001 15V BI OV i BI B port input BIO EOO E port output Sends 2 bit tension control signal to the reel motor drive EO1 circuit At start of PLAY terminal 02 output is and 03 output is B for 15sec irrespective of tape winding diameter After that signals shown below are emitted according to the tape diameter Tape travel aja Motor torque foje ww E eee 4 m eje ww 13 RS M95 E port output e Delivers an output to ground the signal going to LINE OUT for muting purposes during focusing of memory STOP M1 M2 15 Terminal output 0 erminal 5 output mutt Terminal 3 output OV t 10 t e Initiates computer instruction at address 0 1554 12s e Reads in the rotational state
27. of reel table from hall IC output in order to obtain the following functions Functions Tape tension control Digital counter indication tape travel Fuli auto stop FF mode TET mode Terminal input tere thet t gus a Terminal 09 input t 5 7 ms D port output Emits the signal to activate each segment for the indication of tape travel amount on the digital tape counter Relationship between terminal and segment Segment g 67 Segment a 61 Segment f F Segment b 32 Segment e 43 4 63 15V 7 ON Segment d 4 OFF 40 OSC Oscillation input This is the control terminal of oscillation circuit for producing the clock signal on which the computer operation is based f M f 8V Note Do not connect the probe of oscilloscope to this terminal directly otherwise the oscillation frequency may vary 14 ELECTRICAL PARTS LOCATION em mm ELECTRICAL PARTS 51001 S405 PL401 5403 PL403 E46 1402 PL404S551 PL552 5553 51003 8 3100451002 5401 5406 E4 5402 5404 5407 PL551 S552iPLo53 E25 F809 315mAT For All European areas E23 E68 E67 E24 E54 E12 1 4 1F802 F8 200 mAT 1AT 1 6AT1 gAT For All European areas E30 E79 El WY1403Z E2 QWY2137Z E3 0515005 4 02 0027 5 QMA3623 E6 QMA3624 7 QMA3627 E8 QMA3626 9 QMA3625 10 QMA3682 E11 QT
28. tape QZZOWAT Test Tape Playback Mode Wow Meter Fig 14 Standard value 0 04 WRMS Standard DC power supply voltage adjustment 1 Measure the DC voltage between central point of VR703 and 6 terminal of IC702 as shown in fig 15 Capstan motor circuit adjustment Condition x Playback mode Equipment Standard voltage 0x0 05V DC voltmeter Oscilloscope 2 H measured voltage is not within standard adjust VR703 B Phase lock point adjustment 1 Measure the DC voltage between terminal of IC702 and ground as shown below Standard voltage 5 20 1 v If measured voltage is not within standard adjust VR702 Position detecting signal output level adjustment Connect oscilloscope to test point Measure the peak to peak voltage of position detection signal of test point with the oscilloscope 3 If the measured signal voltage is markedly different from the voltage shown below make the necessary adjustment with VR7OI ITEM MEASUREMENT 8 ADJUSTMENT Plavback frequencv response chart B Playback frequency 1 Test equipment connection is as same as response Head azimuth adjustment but use the Condition test Ge SE of head s Plavback azimuth tape See fig 9 008 EE 2 Place UNIT into plavback mode p Output level co
29. 0620 2561684 150 L851 852 C718 0 05223 2 251684 0621 622 SM112 QLQX0331W Peaking Coil 719 ECEASOZR22 Q201 202 203 204 205 206 25 564 MA161 720 ECQMo5562kz 207 208 209 211 212 10623 624 625 626 627 MA161 SWITCHES C721 ECQMOSI53KZ 2SC2021SF 25 1684 301 0586401 Sun 302 303 ca mer A A sate amg NE C723 ECKO1H471K 701 702 n S401 402 403 404 405 406 407 724 ECQM05123KZ ara QSW1111H Push Switch C725 05182 2 258643 128 1846 5551 552 553 554 726 051682 7 XFor All European areas Q704 705 706 D1001 1002 A QSWX409A y os C727 0 05223 7 7 2 Ze WE S601 602 Ge 25620215 SR SE D1004 1005 See ee ECCD1H220K ET 603 QSW1111H Push Switch 730 ECQM05562KZ E ka Gate 5801 A QSW2214 C731 732 733 ad 0801 0389 EE 5807 0581407 Rotary Switch ECEAIHS330 2501317 0802 2SC2021FR CIRCUITS S901 902 C734 ECQM05332KZ SI 0803 2561684 10401 AN6251 QSW1111H Push Switch 0804 250592 402 403 404 55001 5002 5003 5004 801 5082225 IQSWILIH 2561317 0805 251684 M53200P i 9 C802 1 5221 0806 25 564 53273 FUSES C803 ECEA1HS101 Q221 222 223 224 Q807 25 886 5200 M C804 ECEALES221 25 20215 0808 250839 F802 803 C805 ECEA1HS101 Q809 2561317 AN660 OG XBAQ0013 i Fuse 200 mAT C806 EC
30. 09 ECCDIH470K C319 320 ERD25TJ101 8519 ERD25T474 574 ERD25TJ47 R1019 ERG12ANJ390 idi UNES E JR907 908 R1021 1022 1023 1024 C111 112 a ERD25T 562 8551 ERD25TJ473 ERD257J221 1025 1026 1027 1028 SCEAIESSR oss 2 CREDITI R412 ERD2STJI01 8552 02511273 ERD25TJ682 1029 1030 1031 1032 C113 114 Geer a R414 ERD251 331 8553 iERD25TJIB2 18910 ERD25TJ392 1033 ERD25TJ473 ECEAS0ZI JIEFEASUZZAZ R415 ERD25T 272 554 555 911 912 913 914 327 1 5330 R416 ERD25T 332 Enos ERD25TJ472 R1034 1035 1036 1037 116 0028329 ERD25TJ272 R556 ERD25T 273 2025110 8915 916 1038 1039 5101 R557 ERD25T182 174 ERD251J223 ERD25T153 ECEAIES4R7 Caper 558 ERD25TM73 81 Je ag ous l le emesioo 09390 ECDIMIOIK R422 ERDSTJ272 8559 ERD25TJ273 ERD EINES GER VARIABLE C331 EEAO0JS470 R743 ERD25TJ121 ERD25TJ473 RESISTORS 119 120 ja R423 424 425 R560 ERD25T182 Gite Ga Eeomossezjz 0332 BKIDIH102k ERD25TJ473 8561 ERD25T473 EVNKOAAOOB23 lc121 122 C401 402 403404 405 406 R426 428 429 430 Mss ue die Pe 31102 00 52 05273 7 EKD1H1037F ERD5TJ273 562 ERD25TJ182 R748 ERD25TIIS2 cd tr 101 EVNKOAAQOB23 123 124 C408 1 5100 R563 564 565 566 R801
31. 2 CUR 4 El L852 VR853 BIAS CURRENT TP GROUND TP PL TP ST 1 11 ka MICROCOMPUTER TERMINAL OPERATION TABLE Svmbol Function Operation 11 C port output e Emits Plav operation signal in memorv PLAV mode Emits temporarv PLAV operation signal for focusing stop in memorv STOP mode 15 OV t 0 1 1 msec e Emits STOP operation signal in memory PLAY memory STOP and AUTO STOP modes 15 C port output OV t 0 6 1msec C port output e Emits REW operation signal in memory REW mode 15V OV t 0 6 1 msec CO8 C port output The output gives dynamic scan signal to 61003 and 1004 as shown below le 1 8ms al Terminal 5 output Terminal 6 output C portoutput Emits the signals to indicate M1 MP M2 on the digital counter forM2 Terminal 8 for MP 15 Terminal for M1 WE OV OFF 12 RS M95 CO3 C port output Sends scan signal to each grid of digital counter to turn 2 on grids G1 G4 42 GO1 43 COO Terminal output Terminal 4 output Terminal 42 output Terminal output 4 Al3 A port input e Reads in each control mode of REW FF PLAY REC 45 Al2 Terminal 4 input B in REW mode Terminal input B in FF mode 2 AIO Terminal input PLAY mode Terminal d input B in REC mode Level 15 BI3 B port
32. 3 714 715 825 856 R993 ERD25TJ103 055 EC R384 385 386 8505 ERD25TJ332 M SA ERD25TJ154 R995 ERD251J393 0 091032 C303 304 305 306 irs g ERD25TJ102 C56 0 05122 7 ECEAIES101 ERD25TJ103 85066 ERD25TJ102 9716 ERD25TIZ72 897 858 C57 ECEASOZRI R387 ER025TJ470 R507 ERD25TJ473 871 718 DI ERG12ANJ151 R1001 1002 C58 Ee R388 ERD25TJ332 dos ERD25TJ103 For All European areas ERD25TJ682 5 ECkD1Hi02k 0307 308 idus dig SO ee E ERD251473 12101102 309 ap 8720 ERD25TJ182 1 5470 310 ERO251 562 8510 ERGI2ANJ222 R859 860 R1005 ERD25TJ102 c193 ECEA1HSO10 5330 R402 ERD25TJ101 R511 ERDZSTM7I 6 ERD25TJ100 R1006 1007 C104 ECEASOMRIR 311 312 31 314 R403 ERD25TJ562 8512 ERD25U182 8861 ERD25TJIRO ERD25TJ182 REALES4R7 R404 ERO2STIIOL 3 ERDZSTIBZT 3 eRD25TIIa3 8901 902 1008 1009 om ECEAlAs470 0315 316 R405 02573562 R514 ERD25TJ122 R729 ERD25TJ121 ERD25TJ104 ERD25TJ682 106 ECEASOZR47 ECEA1HS100 R406 ERO25TJ101 515 i ERD25TJ101 R903 904 R730 ERD25TJ823 R1010 1011 1012 1013 R516 ERD25TJ153 107 1 5101 317 318 R407 ERO257J562 R731 ERD251J473 ERD25TJ102 1014 1015 1016 1017 C108 ECEA1HS470 R408 8517 0251473 83 lggpogryoz R905 906 ERD257 473 Mai R518 0257 124 C1
33. 4 1 7 229 220 R357 358 R473 ERD25T 562 R663 664 ERD25TJ102 15 16 ECQM05102KZ ECEA1HS100 ERD25TJ682 R474 ERD25TJ473 ERD25TI273 Australia C17 18 0 0527312 0221 22 R359 360 R475 ERD25TJ562 R665 ERD25TJ332 R825 R965 ERD25TJ123 C19 20 ECEA1ES470 ECEA50ZR33 DE ERGIANJ221 R476 ERD257J224 666 ERD25T 272 on ERD25T 47 896 ERD25TJ123 C223 224 XFor All European areas R478 479 R667 ERD25TJ332 XFor All European areas 21 22 ECCD1H331K amp CCD1H470K m ERGIANJ121 ERD25T 471 me6g ERD25TJ272 PUE C23 24 ECEALHS100 0225 226 For Australia R482 ERD25T473 een iERD25TIM3 ERD2STJIZI ERD251 391 025 26 27 28 1 5100 R361 362 R483 ERD25TJ272 For Australia R970 ERD25TJ683 Tecomosigekz 227 228 ERD25TJ124 R670 ERD25TJ181 R826 R971 ERD25TJ333 C29 30 ECQS101JZ 1 5470 R363 364 8484 ERD25TJ473 ERD25T 332 972 ERD25T 102 63321 0 472 2 229 230 ERD25TJ393 R485 ERD25TJ102 R671 ERD25TJ473 For Ali European areas R973 974 975 33 34 ECEA25MAR7 i 1 5101 R365 366 R486 R672 ERD25TJ181 802577222 ERD25TJ683 5 36 ECKD1H102K ERD251J102 ERQ12HJ180 R673 674 x For Australia R976 ERD25TJ103 637 38 ECEA1AS101 C231 232 i R367 368 All European areas ERD25TJ273 R827 ERD25TJ391 C3 p ERD25TJ152 9 40 ECCD1H470K ECQMO05103KZ ERGIZANJ102 R675 676 41 42 50 1 233 234
34. 5TJ101 ERD25TJ154 ERD25TJ224 ERD25TJ153 ERD25TJ184 ERD25TJ333 ERD25TJ124 ERD25TJ331 ERD25TJ332 ERD25TJ472 ERD25TJ332 ERD25TJ331 ERD25TJ271 ERD25TJ681 ERD25TJ471 ERD25TJ103 ERD25TJ123 ERD25TJ102 ERD25TJ332 ERD25TJ154 ERD25TJ152 ERD25TJ472 ERD25TJ473 NOTE RESISTORS ERX ERC Carbon Metal oxide Metal film Metal film Fuse tvpe metallic Solid Cement R265 266 ERD25TJ102 R133 134 R135 136 R137 138 R139 140 R141 142 R143 144 R145 146 R147 148 R149 150 R151 152 R153 154 R155 156 R157 158 1 R163 164 R165 166 R167 168 R169 170 R171 172 R173 174 ERD25TJ124 CAPACITORS Ceramic ECKO Ceramic ECCO Ceramic Ceramic ECQM Polyster Polvster ECQF Polypropylene Electrolvtic ECE IN Non polar electrolytic 05 Polvstvrene ECSO Tantalum Ref No Part No Ref No Part No R205 206 209 210 R211 212 ERD25TJ333 ERD25TJ184 8267 268 R213 214 ERD25TJ273 ERD25TJ152 ERD25TJ124 R269 R215 216 ERD25TJ223 ERD25TJ273 ERD25TJ101 All European areas R217 218 ERD25TJ392 ERD25TD223 ERD25TJ101 XFor Au
35. Board Angie Record Circuit Board Angle Shield Plate Shield Plate A Transformer Angle Switch Angle AC Power Voltage Select Switch Angle Fuse Angle Meter Angie A Meter Angle B Circuit Board Angie A Meter Holding Angle Heat Sink Heat Sink B Jack Board Angle Switch Angle A Heat Sink Push Button Assembly Spark Killer Cover AC Power Cord opean areas except United Kingdom H Cord Bushing Cord Clamper 4 Pin Terminal Cap Screw 34 8 Washer H Screw 3 5 Washer Tapping Screw 23 8 LED Holder Counter Holder Contact A Contact B 9 Pin Connector 15 Pin Connector 12 Pin Connector 6 Pin Connector 3 Pin Connector Circuit Board Angle Shield Angle Nut 8 Nut 9 Nut 12 Washer 8 Washer 9 9 Pin Conne tor Screw 13 x6 Screw 3x5 Washer 15 Pin Plug 12 Pin Plug Cord Clamper Tapping Screw 3X8 Screw 3X5 Tapping Screw D3X6 6 Pin Post 9 Pin Post 6 Pin Post 9 Pin Post Screw 3X20 12 Pin Post 115 Pin Post 3 Pin Post Crystal RS M95 RS M95 Capstan Motor Section detection coil output level adjustment VR k point adjustment VR DC power voltage adjustment VR ms 0 1 4 watt unless specified otherwise ofarads uF unless specified otherwise V parts specified bv the manufacturer be used for safetv FG 0000 IINE 4 e Terminal No IC703 5 6 IC703 9 IC702 l IC702 2 wi 10 R s d gp
36. CK EQUALIZER TEST OSCILLATOR MIC AMP CIRCUIT BOARD 04 92 QTI Q9 10 2SD661 2SB745 25 2021 25 2021 151v DEER Da 6 7 8 2 0661 DERI DOLBY NR CIRCUIT BOARD TAPE SELECT 2 ou e CIRCUIT BOARD 2SK3OAD 2SK30AD 2SC2021 vo au REC O cl 18 8 H zl Q117 2SC2021 SORTEM RODE Q110 2SC2021 1 64V 0 96V HEADPHONES JACK CIRCUIT BOARD INPUT LEVEL CIRCUIT BOARD R386 RECORDING CALIBRATION CIRCUIT BOARD AS ADJUSTMENT CIRCUIT BOARD NOTE The circuit shown in red on the conductor is bias circuit Values indicated in are DC voltage between the chassis and electrical parts 20 CIRCUIT BOARD Q321 322 25 2021 N Epis cht Q319 320 28C2021 es 8 13v Q315 316 2SB641 Q313 314 25 2021 8 178v Q325 25C1846 8 24 2V RECORD AMP CIRCUIT BOARD Q225 Q203 25 2021 25 2021 9226 25 2021 I9 1V 9204 Q202 2SC2021 25 2021 CHE BIAS OSCILLATION CIRCUIT BOARD Q851 Q852 2SD638 250638 cj 10 6V_ la EI 09v BIAS LEAK Bias CUR CUR BIAS LEAK L Q853 2SC202 2SC202 PLAYBACK EQUALIZER TEST OSCILLATOR MIC AMP CIRCUIT BOARD 04 Q2 Q11 2SD661 2SB745 2SC2021 2 85V 7 4 Q9 10 2
37. D25TJ102 ERD25TJ123 iuo ERD25TJ224 ERD25TJ563 R345 ii X For All European areas For All European areas R317 318 319 320 321 322 323 324 325 326 327 328 R329 330 331 332 333 334 SCHEMATIC DIAGRAM Main Amp Section Q301 302 0101 0103 0105 107 109 0113 117 0115 Q 303 305 307 309 25542 03420 0313 319 321 0317 25 2021 250638 0111 25 745 250661 25 2021 25 641 250661 25 2021 2SK30AD 25 2021 258641 25 2021 l 228 Q 3 L 516 6 LINE MUTE D109 182473 1 DOLBY NR 4 SG 4 SENS 9 For Australia oe __ L C236 25V4 O f 74y 5 Ke LINE QUT n R7 D nn CSC QO 1 O HEAD PHONES 59 ra d R185 220K l 1 wages O j R CH PB EQ AMP poer eur jp SS EE EE pem s302 E 5 220 A a OUTPUT 5 A HEAD PHONE AMP Q5 Q7 ___________ 288745 29D680 0 2 i yv Q213 Q215 Q201 203 205 207 A 250592 2SB641 200 0 15 a 2SC2021 IK e RII6 470 VRIO2 20K R315 220 WA SJ NA TER ac ha ri 5 2 R313 a li R249 25V10 305 1 5K L W gt 25V100 bob V vm Bn
38. EA1HS101 0225 0810 2501684 58432 For All European areas C807 ECEAIHS101 25 1846 0811 25 1846 F804 805 C808 ECEAIHS222 All European areas Q812 25 564 l AN6870 DA XBAQ0004 Fuse LAT C809 ECEA1AS101 j 2SC2021FR Q851 852 1 903 904 905 906 For All European areas C810 2584725 Australia 2501317 AC URCABER F806 807 808 1 S 0226 0853 854 907 908 XBAQ0010 Fuse 1 6AT C811 A ECEA1HS222 OH 25C1383 2SC2021SF TA7506P All European areas C813 1 5221 All European areas Q901 90 2 809 C814 ECEA1HSO10 B 2SC2021FR 25 1684 1 909 910 00006 Fuse 315 C815 816 For Australia Q903 904 905 906 907 908 Pa UPC4558C All European areas l2sc20215F 909 910 ECKD1H102K 2SD636R 911 M53273P JACKS C817 ECKD1H222K 25A564 IC1001 MN1430RT ag C851 852 2SC2021SF Q911 912 913 914 0 50035 Jack Board Assembly IC1002 1003 ECQF6562K2H DN6838 J2 QJA0249C Headphones Jack 915 25 1684 3 QJAO444H Microphone Jack C854 ECQF4223KZH 25 945 m E C855 856 X All European areas 1 100 m 25620215 9917 2801684 C857 858 859 860 Australia Q918 254564 PL401 402 403 404 ECOF6102KZH 0231 2SC2021SF Q919 2581684 XAMQ34S50W Pilot Lamp C861 862 Q301 302 303 304 305 306 01001 25 564 PL551 552
39. Fig 11 ITEM MEASUREMENT A ADJUSTMENT Tape speed accuracy 1 Test equipment connection 15 shown in fig 13 2 Playback test tape QZZCWAT 3 000 Hz and supply playback signal to frequency counter 3 Measure this frequency 4 On the basis of 3 000 Hz determine value by following formula f 3 000 3 000 x 100 96 3 Tape speed Condition Playback mode Equipment x Digital electronic counter Test tape Q7ZCWAT Tape speed accuracy Test Tape LINE OUT f measured value 5 Take measurement at middle section of tape Sta nda rd va 0 4 Plavback Head Plavback Mode Digital Electric Counter Fig 13 Tape speed fluctuation Make measurements in same manner as above beginning middle and end of tape and determine difference between maximum and minimum values and calculate as follows 12 12 Tape speed fluctuation x 9 pe sp 3 000 100 96 fi maximum value f2 minimum value Standard value Less than 0 326 Wow and flutter Condition Playback mode lest equipment connection is shown in fig 14 2 Use wow test tape 3 000 Hz and measure its playback signal on wow meter 3 Wow and flutter is expressed in percentage and that measure ment can be weighted by JIS network WRMS 4 Measure at middle section of test tape Equipment Wow meter x Test
40. H1145 E12 QMA3643 13 QMA3638 E14 QMA3640 E15 QMA3639 E16 0751457 17 0151472 18 QMA3635 E19 QMA3637 E20 QMA2885 E21 Dg QMA3804 XFor All European areas E22 i QMA3629 E23 QMA3630 E24 QMA3641 E25 QMH2045 E26 QTH1118 E27 QTH1146 E28 QMA3300 E29 QMA3628 E30 QTH1136 E31 OXRO441 33 7 QTWILIB E34 D 0 1204 For All Eur B QFC1205M United Kingdom M QFC1208M x For Australia E35 QBJ1425 E36 QTD1164 E37 QJT4017 E38 QKJ0242 E39 i 5 4 85 E40 XWA4B E41 XWG4 E42 5 3 55 E43 XWA3B E44 XTN3 8B E45 QMH2043 E46 QMH2044 47 QJT1053 E48 0111054 49 QJS1923TN E50 QJS1925TN E51 QISI924TN E52 QJS1922TN E53 QJS1921TN E54 QMA3636 E55 QMA3633 E56 QNQ1004 E57 QNQ1039 E58 QNQ1070 E59 0402002 E60 QWQ1133 E61 QJS1923TNL E62 XSN3 65 E63 i XSN3 5S E64 XWA3B E65 QJP1925TNL E66 QJP1924TNL E67 QTD1250XN E68 XTW3 8B E69 553 55 70 XTN3 6B E71 QJP1922TN E72 i QJP1923TN E73 QJP1922TNL E74 QJP1923TNL E75 XSN3 20S E76 QJP1924TN E77 QJP1925TN E78 QJP1921TN E79 QZE0012 1 i i 1 i i l Combination Head Record Plavback Erase Head Fluorescent Level Meter Digital Tape Counter Headphones Jack Angle Microphone Jack Angle Circuit Board Angle Switch Angle B Volume Angie Circuit Board Angle Heat Sink A Motor Circuit Board Angle B Control Circuit Board Angle Dolby NR Circuit
41. Hz and read output level on VT VM Refer to Playback gain adjustment 3 Place empty cassette which has been cut and playback again 4 Measure noise level at this time using V TVM and determine ratio of this level to test tape output signal voltage 315 Hz Standard value Greater than 47 dB VR853 L CH VR854 IRCH Q Bias leak Condition Record mode Input level control MAX E quipment VI VM Oscilloscope 1 Test equipment connection is shown in fig 20 2 Place UNIT into record mode 3 Adjust trap coils L851 L CH L852 R CH so that measured VAS value becomes minimum See adjustment parts location on fl 0 page 1 1 R859 L CH A Make adjustment for both channels BIAS OSC RECORD AMP EES 851 L CH 852 R CH Transistor base current waveform adjustment A Lower part of wave form 1 Set the tape selector to the Metal position 2 Press the record and pause buttons 3 Connect the oscilloscope to for 0853 and for 0854 4 Observe the wave form on the oscillescope and adjust VR851 for Fig 21 Q853 and VR852 for Q854 so that the lower part of the wave form Correct waveform is as shown in fig 22 Note The wave form can be Les T B Record bias amplifier circuit improved by turning VR851 L v and VR852 counterclo
42. L METER CIRCUIT BOARD POWER SUPPLY CIRCUIT BOARD CAPSTAN MOTOR CIRCUIT BOARD MICRO COMPUTER CIRCUIT BOARD RECORDING CALIBRATION BIAS ADJUSTMENT CIRCUIT BOARD CIRCUIT BOARD MAIN CONTROL CIRCUIT BOAR MAIN AMP CIRCUIT BOARD MEASUREMENT AND ADJUSTMENT METHODS NOTE 1 Make sure heads are clean 8 Output level control Maximum Make sure capstan and pressure roller are clean 9 Dolby NR selector Out Judgeable room temperature 20 5 68 49 F 10 Input selector Line Tape selector Normal Monitor selector Tape cd OY OI Power supply adjustment G Pressure of pressure roller Condition Playback mode Equipment Tension gauge max 500 gr 9 Takeup tension Condition Playback mode Equipment Cassette torque meter QZZSRKCT Combination head adjustment Condition x Playback mode Equipment VTVM Oscilloscope lest tape Q7ZCRD Tape path viewer with mirror Test tape QZZCFM azimuth Place UNIT into playback mode Hook tension gauge to pressure roller shaft top A and pull Test equipment connection is shown in fig 9 Playback the test tape QZZCRD In this condition adjust screws A and B shown in fig 10 11 Meter light control Bright 12 Peak VU selector Peak Bias adjustment control Center 13 Peak hold selector OFF Input level control Maximum ITEM 14 fimer selector OFF MEASUREMENT
43. MKCN22AE5 QXPO574 XXE26D3FZ QMA3313 0 0243 312 QXHO276 QXL1173 QML3282 QBT1553 Part Name amp Description Plunger Plunger Pin Plunger Lever L Assembly Plunger Lever Reinforcement Angle Capstan Motor Assemblv Reel Motor Motor Pullev Assembiv Set Screw Motor Angle Plunger Plunger Angie R Cassette Holding Cushion Lock Lever Assembiv Connector Lever Holder Spring R M79 M87 Part No QBT1405 QBT1713 QXA0702 XSN26 4 XSN26 4BVS 552 4 553 45 QHQ1185 5 3 55 553 65 0901182 XSN2 3 XSN3 8S XWA2 XWA26 XWA3 QBW2016 M107 Part Name amp Description Lever Spring Record Spring Connector Angle R Assembly Screw 2 6 4 H Screw 2x4 Screw 3X4 Step Screw Screw 3x5 Screw 43 X6 Step Screw Screw 2X3 Screw 3 X 8 Spring Washer 26 Spring Washer 2 66 Spring Washer 3 Poly Washer Ref No M88 M89 M90 M91 M92 M94 M95 M96 M97 M98 M99 M100 M101 M102 M103 Part No QBW2012 QBW2008 QBW2015 QBW2017 QBW2018 QBW2019 QBK7123 XUC3FT XUC25FT XUC5FT XUC2FT XSN26 6 XWG26 XWC3 QXH0308 M57 HW Poly Washer Fiber Washer Stop Ring 3 Stop Ring 2 56 Stop Ring 56 Stop Ring 2 Screw 12 6 X6 Flat Washer Lock Washer Back Tension Plate Part Name amp Description M74 M104 M105 M106 M107 M108 M109 M110 M111 M112 M113 M114 M115
44. SC2021 8 74 DR 1 8 0 E 0 56V_ Q1 2SB745 RER eer E 0 56v Q3 2SD661 Q7 8 2SD661 Q5 2SB745 LC 0 67v DIEN DOLBV NR CIRCUIT 0111 2SK30AD 0113 25 2021 0117 25 2021 35v DESCH Q109 2SC2021 0103 250661 Q101 2SB641 GES DES IC 11 6V B 1 64V 0 96V BIAS ADJUSTM ee Z A Eu EC ccm EM ME C C I a 1 Q601 603 Q605 Q607 609 250638 25 1846 25 2021 REEL MOTOR DRIVE 404 0408 418 25 2021 E 4 SET 3 PLAY IN IN 1 STOP IN OE To T sw2 o Tape O new E S PLAY 0 REC OD COUNTER 8 VRR 2 QUARTZ OUT ow o 5 5 IF E RM pp o CORO 9 9 6 RMO 1 REC INH 2 HALF SENSOR NE 3 P PL OUT qa 7 H PL OUT G A 0407 RA54 150 27K BR nemmnu TEL TH EDITI rt tk 424 R508 gt TOO 10v47 IK i Abd c E TN RE EE DEE 8 A OII MALO E 420 EEN EE DIE ay R510 R513 2 2K 820 425 426 C427 16V2201 0 01 0 01 SEE 0434 25 2021 Q435 2SA564 A a
45. T Confirm that the value at IN position is 8dB greater than the value at OUT position of Dolby NR selector Standard value 8 0 5dB measured value is not within standard adjust as follows D Set the Dolby NR selector to IN position 2 Turn VR104 clockwise completely 3 At this time adjust VR106 so that the output level at test point REC OUT becomes 25 dB Then adjust VR104 so that the output level at test point REC OUT becomes 27 dB Dolby decoder block Set the Dolby NR selector to OUT position Supply 5 kHz signal to test point and on the playback EQ AMP circuit board and adjust ATT to obtain 27 dB at test point on the Dolby decoder circuit board Then change the Dolby NR selector to IN position Measure the output level at test point MO OUT Confirm that the value at IN position is 8 dB smaller than the value at OUT position of Dolby NR selector Standard value 8 40 5 dB l If measured value is not within standard adjust as follows D Set the Dolby NR selector to IN position Turn VR103 counterclockwise 3 At this time adjust VR105 so that the output level at test point IMO OUT becomes 37 dB Then adjust VR103 so that the output level at test point becomes 35dB Test equipment connection is shown in fig 26 Set the monitor selector to tape position and tape selector to CrO position Load reference bl
46. TIC DIAGRAM TAPE COUNTER AND LEVEL METER SECTION ile e NONAS X R1039 15K Ee A F PA B ee 01003 1047 1 6901 55 Peak VU select switch 5 2 5902 Stet Peak hold switch sg 3 1001 Memory 1 reset clear button switch 4 51002 1 stop plav button switch 5 S1003 Memorv 2 set recall button switch Q1001 6 51004 Memorv 2 clear button switch 2SB641 7 902 Level meter balance adjustment VR 8 VR903 Level indication adjustment VR at 20 position 9 VR904 905 Level indication adjustment VR at 42 position 10 906 Level indication adjustment VR at 23 position 11 907 Level indication adjustment VR at 0 position E 12 Resistance are in ohms Q 1 4 watt unless specified otherwise PLAY OUT 3 1 0000 m a 13 Capacity are in microfarads uF unless specified otherwise EE H 14 NS in circui i iti voltage values shown in circuitry are under no signal condition PLAY IN EN EE EN with volume control at minimum position ej BER e 008 WI O w2 Au 5 MUTING 11 y amp amp lt lt lt lt lt Wr O 7 2152473 T
47. Washer 2 Spring Washer 2 66 Spring Washer 3 Washer Ref No M88 M89 M90 M91 M92 M94 M95 M96 M97 M98 M99 M100 M101 M102 M103 Part No QBW2012 QBW2008 QBW2015 QBW2017 QBW2018 QBW2019 QBK7123 XUC3FT XUC25FT XUCSFT XUC2FT XSN26 6 XWG26 XWC3 QXHO308 M57 Part Name amp Description Poly Washer Fiber Washer Stop Ring 39 Stop Ring 2 5 i Stop Ring ba Stop Ring 2 Screw 2 6 6 Flat Washer Lock Washer Back Tension Plate M74 Ref No Part No 0 00101 0701271 QML1276 QMA3642 0701163 QBC1235 QBC1221 0871619 XSS2 410 XSN2 4 XNF26AF QBK7005 Part Name amp Description Takeup Reel Table Assembly Hall IC Holding Plate Erase Head Lever Circuit Board Angle Rug Plate Head Spring Idler Spring Screw 42X10 Screw F2X4 Nut Washer Y F A Printed in Japan M50 EXPLODED VIEWS Ref No Part No Part Name amp Description MI QXK2152 M3 0701270 4 0 1733 5 00 1012 6 321 7 QXL1168 M8 QBT1490 M9 0871441 10 0 11166 Mil QML3267 M12 0 00087 13 QBC1272 M14 QMG0054 M15 QMH2009 M16 QDK1006 MECHANICAL PARTS Head Base Plate Assembly Head Wires Clamper Steel Ball Holder A Steel Ball 2 56 Lamp Angle Pressure Roller Lever Assembly Eject Lever Sprin
48. a EA N ed nee ee J WAVE FORM 1C703 and IC702 CAPSTAN MOTOR SECTION Terminal No IC703 5 6 IC703 9 IC702 1 IC702 2 Terminal Terminal Measured Wave Form Measured Wave Form Position det No No FG signal IC702 IC702 around BN gt a 16 3 4 d 6 around ee around 7 ON gt around CAP Crvstal signal NOTE The RS M95 113 1 Q115 Q 303 305 307 309 Q311 312 315 323 Q313 319 321 Q317 Se 9113021 258641 25 2021 25 641 25 2021 250638 pus O 3 L 516 lt O 5 R SIG 0 LINE MUTE 9 O 1 DOLBY NR m lU fo BHO T O a QUTPUT HEAD PHONE R327 10K DEE E UA AN EE a Q213 Q215 Q201 203 205 207 2SD592 2SB641 209 211 2SC2021 VRIO2 20K BO AMETE R315220 0W C221 e 50V0 33 R249 1 5K ae 96V t 8245 247 5223 203 275 10K 270K Q 25 10 1 25V R261 220K R237 1 8K 205 27 3 215 R221 0 033 120 R24 150 Q106 108 110 119 Q112 2SC2021 2SK30AD Q114 118 QTI6 2SC2021 2SB641 lt lt A A VR301 2 4 O71 20 TAA 1 2 3
49. ank test tape QZZCRX Press the record and playback buttons Supply 1kHz signal to LINE IN and adjust ATT so that tape monitor output level at LINE OUT indicates 0 65 V Then disconnect input plug to LINE IN 7 Measure tape monitor output signal levels of 1 kHz and no signal level noise and determine the retio in decibels dB The value is difference between Playback S N and S N but for decibel calculation refer ta Playback S N measurement on page 6 Standard value Greater than 45dB without NAB filter Test oscillation level 1 Set the input selector to 400 Hz 8 kHz position and monitor selector to source position 2 Press the record and pause buttons 3 Measure the output level of LEFT 400 Hz and RIGHT 8 kHz channels at LINE OUT Standard value Same level 4 f output levels are not same adjust 1O 5 95 ADJUSTMENT PARTS LOCATION VR904 VR2 R TP VR903 VR VR906 R CHE 905 907 902 103 VR3 MO OUT Becer Dolb IMO OUT Encoder VR104 REC OUT VR203 VR102 VR204 REC OUT E 20 VR85 VR104 VR106 VR852 VR851 BIAS LEAK L851 1207 1203 1201 1205 1208 1204 1202 1206 VR701 HEN 7 VR105 VRI L TP E VRIO1 IMO OUT Dolby Encoder JMO OUT Dolby Decode der VR801 VR103 20V 5V TP VR601 VR105 VR101 E T85
50. biv QMH2028 Cassette Holder R QXA0704 Angle R Assembly QKJO245 Spacer A QXH0286 Mechanism Cover opean areas except United Kingdom 0 02778 Kingdom and Australia QMZ1213 Spacer B QBP1135 Spring Washer QXL1165 Lever B Assembly QXL1188 Eject Lever Assembly QDP1758 Roller 0 0713 Angle Assembly QML3284 Release Lever QMA3314 Connector Angle QBT1753 Playback Lever Spring Plunger Angle L Ref No M53 M54 M55 M56 M57 M58 M59 M60 M61 M62 M64 M65 M66 M67 0 0141 QMN2095 QXL1171 QML3276 QMA3681 QXK2010 MKCN22AE5 0 0574 XXE26D3FZ QMA3313 0 0243 312 0 0276 0 11173 QML3282 QBT1553 Part Name amp Description Plunger Plunger Pin Plunger Lever L Assembly Plunger Lever Reinforcement Angle Capstan Motor Assembly Reel Motor Motor Pulley Assembly Set Screw Motor Angle Plunger Plunger Angle R Cassette Holding Cushion Lock Lever Assembly Connector Lever Holder Spring R Ref No M68 M69 M70 M74 M75 M76 M77 M78 Part No QBT1405 QBT1713 QXA0702 XSN26 4 XSN26 4BVS XSS2 4 553 45 0 01185 XSN3 5S 553 65 QHQ1182 XSN2 3 XSN3 8S XWA2 XWA26 XWA3 QBW2016 M107 Part Name amp Description Lever Spring Record Spring Connector Angle R Assembly Screw 2 6 4 Screw 2 x4 Screw 3x4 Step Screw Screw 5 Screw 3X6 Step Screw Screw 92 Screw 43 8 Spring
51. ckwise Stop turning VR851 if the wave is deformed as shown here adjust VR852 immediately after VR851 and VR852 elimination of deformed part of the wave Fig 22 RS M95 ITEM MEASUREMENT 8 ADJUSTMENT B Upper part of wave form NU MV c Correct waveform 5 After adjusting the lower part of the wave form the upper part of the wave QN NY ud 6 If the wave form is as symmetrically b distorted as shown in fig 23 adjust Fig 23 1852 Note H the wave form is observed as in a turn T852 clockwise If the wave form is observed as in b turn T852 counterclockwise In each case to achieve symmetrical pattern as shown in c Test equipment connection is shown fig 24 2 Press the record and pause buttons Set the tape selector to normal position 3 Read voltage on V TVM and calculate bias current by following formula 9 Bias current Condition Record mode Bias adjustment control Center RECORD Record mode Equipment Bias current A 2 Value read on VTVM V VIVM 10 9 VTVM Oscilloscope Oscilloscope Standard value 1 0 40 3mA 4 Adjust VR853 L CH and VR854 R CH See adjustment parts location on page 11 5 hen changing the tape selector to Fe Cr position measure the bias current Standard value 1 1 0 3mA 6 If measured value is not in stan
52. con 094 152473 6800 LE J PREET IC911 M53273P IC901 AN6870 1 RECORD DOLBY CIRCUIT BOARD REEL MOTOR PLUNGER MONITOR For Australia For All European areas GATT Ee genos CIRCUIT BOARD CIRCUIT BOARD NOTE The circuit shown in red on the conductor is bias circuit 22 SCHEMATIC DIAGRAM POWER SECTION For All European areas F802 a e 71 A Atl 200mAT e A F803 200mAT 0812 258641 5 15 0801 250389 0802 2SC2021 R S 8803 15 VW Q804 250592 R S 0805 2SC2021 R S R811 18 V9W 801 pa 801 804 5 102 4 1801 DO AC POWER 0806 2SB641 S T Q807 2SA886 Q R Q808 250389 P D 2809 28D638 R S 4AD805 806 10DC1x2 0807 808 10DCIRx2 F807 AXD809 812 5 102 4 O O Acsio P 2544700 T Ee gO e Ee eege NOTE 1 5801 Power ON OFF switch 2 S802 2 AC power voltage select switch 3 801 DC voltage 20V adjustment 4 Resistance are in ohms 0 1 4 watt unless specified otherwise K 1 0000 5 Capacity are in microfarads uF unless specified otherwise P Pico farads 6 All voltage values shown in circuitry are under no signal condition and record mode with volume control at minimum position 7 A indicates that only parts spec
53. control for 2 tape 1 0000 14 201 5 5 5 5 Erase current adjustment VR at metal position 25 10 Bias current adjustment control for metal tape 35 Capacity are in microfarads uF unless specified otherwise 15 202 Bias current adjustment VR at Fe Cr position 26 VR851 852 Bias wave form correction at metal position P Pico farads 16 203 Bias current adjustment VR at CrO position 27 VR853 854 Bias current adjustment VR at normal position 36 All voltage values shown in circuitry are under no signal condition 17 204 5 Bias current adjustment VR at Metal position 28 1201 202 Record equalizer adjustment coil for 2 tape with volume control at minimum position 18 3 01 Input level control 29 L203 204 Record equalizer adjustment coil for Fe Cr tape 19 302 Meter light control 30 L205 206 Record equalizer adjustment coil for metal tape R308 eran AM 25V33 Q bn a TUUS E SET 2 206 2SB641 Q225 226 230 ESISTORS ERD25TJ101 ERD25TJ682 ERD25TJ183 ERD251223 ERD25TJ152 ERD25TJ332 ERD25TJ154 ERD25TJ474 ERD25TJ221 ERD25TJ821 ERD25TJ222 ERD25TJ392 ERD25TJ474 ERD2
54. dard adjust VR202 Change the tape selector to CrO position measure the bias current Standard value 1 5 0 4 mA 8 f measured value is not in standard adjust VR203 9 Change the tape selector to the Metal position measure the bias current Standard value 2 2 0 6mA If measured value is not in standard adjust VR204 lest equipment connection is shown in fig 25 oet the tape selector to the Metal position Press the record and pause buttons Measure voltage on VT VM Determine erase current with the following formula Voltage across both ends of R861 1 Q Erase current Condition Record mode Bias adjustment control Center Erase Head ra 7 D BIAS OSC CIRCUIT O1 G MN Equipment Erase current A VIVM Oscilloscope vrun Osililoscope Standard value 95 5mA Metal position Fig 25 6 If measured value is not within standard adjust VR201 9 Overall gain 1 Test equipment connection is shown in fig 26 Condition 2 Set the tape selector to Normal position Uds T 3 Supply 1 kHz signal 24dB from AF oscillator through Red 72 43dB to LINE IN of 4 LINE 24 adB 4 Adjust ATT until source monitor level at LINE OUT becomes A ca 0 65
55. equency response chart Normal 6 kHz 13KH 5dB 1 Test equipment connection is shown in X fig 26 2 Load reference blank test tape 3 Set the monitor selector to source position 4 Supply 1kHz signa from AF oscillator ze through ATT to LINE IN 5 Adjust ATT so that input level is 248 20dB below standard recording SR level standard recording level 0 VU 6 At this time LINE OUT level indicates 0 065 V Change the monitor selector to tape position 8 Press the record and playback buttons and supply each frequency signals 1 kHz 30Hz 70 Hz 700 Hz 6kHz 8kHz 10 kHz 13kHz 15 kHz and 16 kHz 9 Measure the tape monitor output level and express in dB the difference between the tape monitor output level of each frequency based on output level of 1 kHz 10 Make sure that the measured value is within the range specified in the overall frequency response chart Fig 33 Overall frequency response chart Fer CrO2 Metal SKH 8KHz KHz Wen ishing 7448 UKHz Adiustment 1 Using bias current 1 When the frequency response between the middle and high frequency range becomes higher than the standard value as shown by the solid line in fig 35 increase the bias current turning the following VR Normal VR853 L CH VR854 R CH par iu 8kHz 12kKHZ Fig 35 2 When it becomes lower as shown by dotted line reduce t
56. fini ui level is 0 65 V 4 5 30 8 9 o5o0o30000 0004 8 9 Turn VR907 counterclockwise ei Il completelv Fig 28 10 Slowly turn VR907 clockwise until the 4 1 dB indication on the meter goes out C Adjustment of balance between right and left channels 11 After the adjustment adjust EE ee VR902 for right channel if necessary so that the right channel indication matches the left channel MA ka a indication 240 CENERE D Adjustment of 42 dB indication Fig 29 _42 dB indication lights up with power supply turned on 400 30 _ 20 10 5030000004 8 12 Attenuate the ATT by 42dB wl IIITIIIUITIIUIITUIUITTIIITUTT the standard input level Then the source monitor output level is 0 0052 V 13 Fully turn VR904 L CH and Fig 30 VR905 for R CH clockwise 14 Slowly turn VR904 and VR905 counterclockwise until the 40 dB indication on the meter goes out E Adjustment of 22 dB indication 15 Attenuate the ATT by 22dB from Mmm eno rom a the standard input level 402 30 o 20 10 0 004 8 Then the source monitor output SERERE L O E level is 0 052V 16 Turn VR906 counterclockwise ui TUL completelv Passi Dr 17 Slowly turn VR906 clockwise until Fig 31 the 20 dB indication on the meter goes out
57. g Pressure Roller Spring Pressure Roller Assembly Pressure Roller Lever 1 Reel Table Back Tension Spring Cassette Guide Steel Ball Holder B Steel Ball 3 Part No QXL1189 QBF1260 QXI0101 QBC1308 QXL1164 QML3273 QBG1132 0 0714 QBN1573 QML3285 QXL1172 QXA0703 QXL1191 QXL1190 QXA0706 QMH2027 Part Name amp Description Lever Assemblv Idler Felt Idler Assembly Idler Spring Brake Lever Assembly Brake Stopper Rubber Detection Angle Assembly Detection Lever Spring Detection Lever Lever A Assembly Angle L Assembly Link Lever A Assembly Link Lever B Assembly Holder Angle L Assembly Cassette Holder L M37 M38 M39 M40 M41 QXA0705 QMH2028 0 0704 QKJO245 QXHO286 Part Name amp Description Holder Angle R Assembly Cassette Holder R Angle R Assembly Spacer A Mechanism Cover All European areas except United Kingdom 0 02778 United Kingdom and Australia M42 M43 M45 M46 QMZ1213 QBP1135 QXL1165 QXL1188 QDP1758 QXA0713 QML3284 QMA3314 QBT1753 QMA3311 Spacer B Spring Washer Lever B Assembly Eject Lever Assembly Roller Angle Assembly Release Lever Connector Angle Playback Lever Spring Plunger Angle L M53 M54 M55 M56 M57 M58 M60 M60 M61 M62 M63 M64 M65 M66 M67 Part No 0 0141 QMN2095 QXL1171 QML3276 QMA3681 QXK2010
58. he bias current by turning in the direction opposite to arrow indication Note 1 For adjustment when the bias current is lower than the standard value use the procedure indicated in adjustment 2 because reducing the bias current beyond this point may worsen the distortion factor 2 For the method of bias current measurement refer to Bias current adjustment on page 7 IkHz 2kMz Adjustment 2 Using the peaking coil for recording equalization When the frequency response is flat in the middle frequency range and makes a sharp rise or drop in the high frequency range as T 0 shown fig 36 adjust bv turning the following peaking coils Normal L207 L CH L208 R CH Ge G ss L205 L CH L206 R CH 298 N CrO2 L203 L CH L204 R CH Metal L201 L CH L202 R CH 2kHz f Fig 36 RS M95 ITEM MEASUREMENT amp ADJUSTMENT Dolby NR circuit Equipment VTVM AF oscillator ATT Oscilloscope Q Overall S N ratio Equipment VI VM AF oscillator XATT x Oscilloscope x Test tape Q7ZCRX reference blank tape Test oscillator Dolby encoder block Set the Dolby NR selector to OUT position Supply 5kHz signal to LINE IN to obtain 35dB at test point IMO OUT on the Dolby encoder circuit board Then change the Dolby NR selector to IN position Measure the output level at test point REC OU
59. ified by the manufacturer be used for safety r 966 0 8 E Es OHS 6 d m o lt QUARTZ 28V 15 BRIGHT CONTROL 20V lt 20 QUARTZ VPR H VPH 87 lm To Meter Section To Capsten Motor Section To Main Avplifier Section To Main Control Section For Australia 0812 2SB641 S T O e O ISV Meter Section a C814 QE 50V1 l d Le ba Capstan Motor Section 0804 250592 R S Q801 2SD389 P Q TERYT 801 0802 25 2021 IR S Em 0805 25 2021 R S SL 801 RBII 4 1 1801 AN Gw CO HHH e D LEES 885 8812 I Ee 20V To Main Amplifier Section Q D O Q 3 VRR 50V100 L AC POWER 169100 0806 2SB641 S T P 0808 250389 P D 0807 25 886 20 0809 250638 5 EE 5V 11 2V 805 806 10DC1x2 p QUARTZ To Main Control Section d VPR VPH 87V Q TO AD807 808 100 1 2 J e 809 812 5 102 4 Acsio 2 25V4700 0811 25 1846 1828 93 4 7 2W CIRCUIT BOARD p Q 5 q Ss 5 2 T On 54 95 Sa 5 5 9 So l 20 se ke 55 b E S 2 22 22 o Ux
60. ntrol MAX Vae 3 Playback frequency response test tape 5008 Equipment QZZCFM Fig 19 4 Measure output level at 12 5 kHz 8kHz 4kHz 1 kHz 250 Hz 125Hz and 63Hz and compare output Oscilloscope level with standard frequency 315Hz at LINE OUT Test tape QZZCFM 5 Make measurement for both channels 6 Make sure that the measured value is within the range specified in the frequency response chart 7 measured value is not in standard adjust VR1 L CH VR2 R CH See fig 35 on page 9 Q Playback gain Condition Playback mode Output level control MAX Equipment x Oscilloscope x lest tape QZZGFM 1 Test equipment connection is shown in fig 9 2 Playback standard recording level portion on test tape QZZCFM 315 Hz and using VTVM measure the output level at LINE OUT jack 3 Make measurement for both channels Standard value 0 65 0 05V Adjustment 1 If measured value is not standard adjust VR101 L CH VR102 R CH See fig 37 on page 11 After adjustment check Playback frequency response again Playback S N ratio Condition x Playback mode Output level control MAX Equipment VT VM Oscilloscope Test tape QZZCFM Empty cassette Test equipment connection is shown in fig 9 2 Playback standard recording level test tape QZZCFM 315
61. p LO 2 dy 2 lt 9 OF Zo 29 ot OO lt lt H 8 1 2 2 E 3 9 1 A 9 sw G 2 lt c lt 8 h d P o JF cc 65 CG a SE 6 9 229 2 D O 9 3 shown in red on the conductor s circuit icated in are DC voltage e chassis and electrical parts ESD EE Ee RD E CABINET PARTS Part No QGC1130 0 0392 QKA1076 XSN4 65 QYP0839 0611132 QGK2804 QHQ1272 QBG1551 QGT1438 QGT1439 QGK2934 QGS2689 All European areas except GIA QGS2690 United Kingdom and Austr 611 QXHO301 G12 QXS1104 G13 XUC25FT QDP1387 QBC1177 QMK1816 XTN3 8B 0150803 QMA3445 QVTO507 QYTO508 QYTO509 0601531 0601532 0 1836 QKF6013H QBW2046 553 65 553 8 5 5 4 85 XTN4 8B QGK2944 XVE26A4FZ 0601553 XTN3 6B QBW2007 RP023A QFTC305011TZ QQT2629 Part Name amp Description CABINET PARTS Case Cover Button Cover Assembly Rubber Foot Screw 4X6 Front Panel Assembly Meter Cover Cassette Lid Cassette Lid Holding Screw Rubber Cushion Volume Knob D Volume Knob E Sub Plate Main Name Plate United Kingdom n alia Eject Plate Eject Button Stop Ring Roller Eject Spring Back Cover Screw 3x8 Remote Control Socket Socket Angle Volume Knob A Volume Knob B Volume Knob C Push Button A Push Button B Plate Spring Lower
62. s R219 220 ERD25TJ332 R270 271 272 273 274 275 ERD25TJ102 R221 222 ERD25TJ822 R276 ERD25TJ821 ERD25T472 ERD25TJ822 edis ERQ12HJ120 e ERD257J474 JE ERD25TJ153 All European areas R225 226 ERD25TJ103 ERD25TJ150 ERD25TJ153 id n Ree ieee ERD25TJ273 ERD25TJ101 ERD25TJ471 R229 230 ERD251J273 8281 ERQI2HJ390 JR231 232 ERD25TJ153 European areas ERD25TJ101 ERD25TJ150 233 234 ERD25TJ104 wFor Aus ERD25TJ683 R282 ERD25TJ332 R235 236 ERD25TJ682 ERD257J472 ERD25TJ184 R237 238 ERD25TJ682 ERD25TJ562 ERD25TJ273 R239 240 ERD25TJ822 ERD25TJ184 R283 ERD25TJ822 R284 0p ERD25TJ154 x For All A ERD25TJ272 X For Austra R2 ERD25TJ222 SC Austra R286 ERD25TJ223 R287 ERD25TJ473 x For All ERD25TJ332 R288 R289 ERD25TJ392 ERD25TJ822 R292 R293 ERD25TJ102 R294 ERD25TJ185 R295 296 297 ERD25TJ105 R298 R301 302 ERD25TJ153 R303 304 305 306 ERD25TJ101 59 160 161 162 R307 ERD25TJ822 R308 R309 ERD25TJ103 R310 R311 312 3 BB ERD251J333 BI ERD25TJ333 For Australia R315 316 ERD25TJ154 OB ERD25TJ272 D ERD25TJ102 Aus ERD25TJ151 R175 176 ERD25TJ330 ERD25TJ103 R177 178 ERD25TJ820 ERD25TJ274 R179 180 335 336 ERD25TJ153 ERD25TJ152 R181 182 183 184 R337 338 ERD25TJ270 ERD25TJ101 R 85 186 R339 340 55 256 257 258 ERD25TJ224 R341 342 ER
63. t divider wave hold voltage 9 generator Miss a generator r L JI C718 709 VR701 20V comparison A circuit 4 Standard voltage R721 drive circuit o 20V 1 ditrergnya Primary Secondary rive circuit side side lower Leg di Position detection coil i 42 400 gt amp C706 CAPSTAN MOTOR CIRCUIT BOARD NOTE The circuit shown in red on the conductor is B bias circuit RS M95 RS M95 Capstan Motor Section R73 8738 8739 A 15K 82K 39 1 VR701 Position detection coil output level adjustment VR 702 Phase lock point adjustment VR 2 C QUARTZ gt To Power Section 3 VR703 Standard DC power voltage adjustment VR 4 Resistance are in ohms Q 1 4 watt unless specified otherwise L Ot K 1 0009 FG PROG CSR VS 5 Capacitv are in microfarads uF unless specified otherwise ee ANECO P Pico farads 6 A indicates that only parts specified by the manufacturer be used for safety FO 572 SH2 o E n FG coil B FU V hlo 2 API PC OSC PCOM GND Ge IC701 64 WD ECR Q701 703 2SC1846 Q R Q704 706 2SA885 Q R ES a ae a
64. ver HEADPHONE output level 88 load impedance 802 85 kHz 2 motor system Capstan l quartz control phase lecked DC brushless direct drive motor Reel table 1 DC coreless motor 3 head svstem 2 HPF heads for rec plavback cembination tvpe l sendust ferrite double gap headfor erasure AC 110 125 220 240V 50 6 Hz 46W 50W for England and Austalia A5cm W x 14 2 cm H X 34 8 cn D 12kg x Dolby and the double D symbol are trademarks of Dolby Laboratories Technics Matsushita Electric Traditg Co Ltd Box 288 Centre Osaka Japan LOCATION OF CONTROLS AND COMPONENTS tere select i rec stop plav ff rec mute tape 5 norme fe Cr CrOe Metai green red Q o memory 2 E aa ata a SP Vct PES Fa ES SC reg SS SERVICE PERSON D Eject button 2 Cassette compartment door 8 Digital tape counter 4 Quartz strobo 5 Fluoresent level meter 6 Peak VU selector 7 Peak hold selector 8 Power switch Headphones connection jack 10 Microphone connection jacks a Recording calibration controls 2 Bias controls 1 pom SYRTEM MANU FQ UNDER SENSE F KE EE REMOTE CONTROL ABORATURISE Nr eme Fig 1 3 Timer operation selector Dolby noise reduction selector 5 Input selector Meter

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