Tascam 122MKII Service Manual Download Page 33 | Manualshive

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Tascam 122MKII Service Manual Download Page 33

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Summary of Contents for 122MKII

Page 1: ...TEAC Professional Division SERVICE MANUAL Master Cassette Deck Effective March 1987 B10124 5704035900...

Page 2: ...Conversion 18 6 Electrical Checks and Adjustments 6 1 Playback Performance 21 6 2 Monitor Performance 22 6 3 Recording Performance 23 7 Exploded Views and Parts Lists 25 8 PC Boards and Parts Lists 3...

Page 3: ...hilips type cassette C 60 and C 90 4 track 2 channel stereo 4 8 cm s 1 7 8 ips 0 5 12 0 04 NAB weight_ ed 0_08 peak DIN IEC ANSI weighted 90 seconds for C 60 1 FG servo direct drive capstan motor 1 DC...

Page 4: ...To I O ljO tHlI l TA f T 7 TEAC MTT IIII J j o 2 O lJjO UlO TA f T 7 1 I METAl MTT 5571 2 Specifications were determined using TEAC Test Tape NORMAL MTT 5511 METAL MTT 5571 Cr02 MTT 5561 Cr02 MTT 5561...

Page 5: ..._ J U fA LOd8 0 7 IOd8v OOL8Y N R I D COO R I T P1d J IOdtv 1 I I I I PEAK LED vu MEn R REC 1 HEAO NORMAL Cr02 METAL _ _ sc f HX PRO 100 1 0 R 01 L ________________________ f ERASE U x HEAD External D...

Page 6: ...l MKH I 2 REMOVAL OF EXTERNAL COMPONENTS H O l15 Disassemble in number order lfjl j L CT L I Ql e I 4...

Page 7: ...SSY 2 POWER SW PCB ASSY 10 H PHONE PCB ASSY 3 CONTROL PCB ASSY 11 MONITOR SW PCB ASSY 4 B T CONTROL PCB ASSY 12 REC AMP PCB ASSY 5 PITCH CON PCB ASSY 13 PLAY AMP PCB ASSY 6 COUNTER PCB ASSY 14 MOTHER...

Page 8: ...Sensor Arm PCB Assy Sensor rm Supply Reel Table L _ __ j J _ I J Y ERASE Head Head Ass y Ta ke u p Reel Table f Pinch Roller Fig 3 2 Cassette i n Reel Motor Record Safety Red uction Pulley Switch o _...

Page 9: ...eral use type Sensitivity 25 mV or more Impedance 1 Mohms or more Range 1 Hz 1o MHz Tape speed measurement Wow flutter measurement and Bias frequency measurement DC Voltmeter General use type Digital...

Page 10: ...est signal recordings and others TEAC MTT 5561 Part No 4900041900 Cr02 TEAC MTT 5571 Part No 4900042000 METAL Mirror Tape TEAC MTT 902 Part No 49000 15200 Tape travel check 4 2 PRECAUTIONS 1 Before ma...

Page 11: ...I 1 JIS NAB DIN CCIR WTD UNWTO 7 77 7 ftll it 1 IHll 1 7 1iI ffl ffl 25mV t J J 1 t 7 z 1 M 0 t J J IJ if LEi 1 Hz IOMHz 7 7 z e I Ij it 7 77 7 IJ it 7 z t I LEi I i LliL1 tt t JUffl T 7 1 I t I TO 7...

Page 12: ...T 256 DIN Ref Leve l 4900050900 1l f t 9 3180 120 L sec 31 5Hz 14kHz 1 7 A mLIt j f j tt fl TEAC MTT 5511 4900041700 TEAC MTT 556 I 4900041900 TEAC MTT 557 1 4900042000 7 e 5 7 T 7 NOR MAL 7 5 7 T 7 C...

Page 13: ...just tilt adjusting screw B Fig 5 4 as required After com pletion of the adjustment make sure the head height adjustment is not upset using the step 2 above 4 Adjust P B head azimuth by adjusting scre...

Page 14: ...times 6 5XjjH 7i A r r Z T llilL iti 2 00 b L 3 6 Then observe the stop position of the head base If the head J1i c fIi2 nt itz iU J I TI 0 J j ti G1 1 R547 2 2 G base still exceeds than the position...

Page 15: ...e in Fig 5 B 5 3 4 CUE MODE 1 Load a prerecorded tape Make sure cue signal is developed when the FF or REW button is pushed with the PAUSE mode set If the cue signal is not devel oped or the level is...

Page 16: ...O 1 S 2mm F F xl t REW E 1 1J j Head base should be in the lowest position during STOP mode 7 77 t IJ j tT Fig 5 7 c during PAUSE mode Pinch roller arm t 7 0 57 i C i A t H Pinch roller spring 7 1 Fig...

Page 17: ...4 If the take up torque is still out of the limits adjust the torque adjusting ring provided on the right reel table The torque can be adjusted to three values as shown in Fig 5 10 Turn the torque adj...

Page 18: ...the test tape_ c Adjust the speed trim pot R502 refer to Fig 3 1 provided on the rear side of the PITCH CONTrol switch using a small driver with the handle completely insulated from the blade to obta...

Page 19: ...t the holder guide plate s mounting position so that when the cassette holder in which the cassette tape is inserted is closed the parallel condition shown in Fig 5 12 is obtained Viewed from right si...

Page 20: ...0 5 to 1 5 seconds L C l t Q o air adjusting screw 8mm Damper IIllfrl ill Fig 5 13 5 10 VOLTAGE CONVERSION FOR GENERAL EXPORTMODELS ALWAYS DISCONNECT THE POWER LINE CORD BEFORE MAKING THESE CHANGES 1...

Page 21: ...L BIAS ADJUSTMENT Cr02 BIAS ADJUSTMENT METAL REC EQ ADJUSTMENT NORMAL REC EQ ADJUSTMENT Cr02 REC EQ ADJUSTMENT METAL REFERENCE NUMBER R107 R207 R1OS R20S R109 R209 U126 VR PCB ASSY FUNCTION REC LEVEL...

Page 22: ...DOLBY LEVEL CALIBRATION U104 U204 BIAS TRAP REPRO Rl16 R216 REPRO EQ ADJUSTMENT Fig 6 2 Check and Adjustment Points on PLA Y AMP P C B ASSY L152 L25 2 TP 1 3 TP 23 TP 12 TP 22 REFERENCE NUMBER L152 L2...

Page 23: ...J 7 7 thtJ c t Co C ll 2 UlIf 3 Repro frequency responce jfi I J j 11 Connection j ft Fig 6 MTT 256 R116 R216 Fig 2 OUTPU T RCA pin iack Level difference as slight as possi ble between for 315 Hz and...

Page 24: ...me a above 5J t 400 Hz 10kHz switch 400 Hz 10 kHz No signal ffii i li R325 Fig 6 1 VU meter Indication Adiust for minirnum level difference bBtween 400Hz and 10kHz swilch positions 7 1 T 1 J t LV C e...

Page 25: ...mY produce between for 400 Hz and 10kHz 400 Hz C 10kHz O j Jl j itJtJ I l Q co INPUT REAR RCA REC azimuth OUTPUT RCA pin jack L R Phase between L ch 10 kHz 40 dBV adj screw R ch 90 or less 10 0 mY Fig...

Page 26: ...iciency 1 kHz filter connect 1 kHz O dBV 65 dB min lli AA 1 kHz 7 fiV 1ii 1J i 1 0 V Test tape MTT 5571 Record a 1 kHz signal rewind tape to mid point of recorded potion Erase the recorded portion wit...

Page 27: ...the parts lists or parts though listed having no parts numbers are not general ready to supply parts Dolby Noise Reduction System manufactured under license from Dolby Laboratories Licensing Corporat...

Page 28: ...122MKH I EXPLODE VIEW 1 26...

Page 29: ...6100 5800757300 5800471500 5800894900 KNOB VR KNOB A ASSY 14 KNOB C ASSY l4 S oo 7 Sb300 SPRING EFECT A ESCUSHION BUTTON 1 21 1 22 1 23 5800825400 5800934000 5800828200 ESCUSHION METER ESCUSHION B BUT...

Page 30: ...122MKH I EXPLODE VIEW 2...

Page 31: ...R SW PCB ASSY SUPPORT PCB LCB 4L MONITOR SW PCB ASSY TRANS POWER J TRANS POWER US C TRANS POWER GE TRANS POWER E UK A CORD AC J CORD AC US C GE CORD AC E CORD AC UK CORD AC A BUSHING SW VOLTAGE SELECT...

Page 32: ...122MKll I EXPLODE VIEW 3...

Page 33: ...800932600 REEL TABLE ASSY R REEL TABLE ASSY L 3 26 5800932800 RING HISS 3 27 5800159100 HOLDER SPRING 3 28 5800124300 SPRING TENTION 3 29 3 30 5800158800 5534282000 5800131601 GEAR ASSY COUNTER A MAGN...

Page 34: ...122MKll I EXPLODE VIEW 4 32...

Page 35: ...Y IDLER ASSY SPRING IDLER ARM DAMPER ASSY 4 21 4 22 4 23 4 24 5800941200 5200195410 5800833900 5200219300 BRACKET DAMPER CONTROL PCB ASSY PLATE PRESSURE B T CONT PCB ASSY 4 51 4 52 4 53 4 54 4 55 5783...

Page 36: ...C BOARDS AND PARTS LISTS t t I y I A CONTROL PCB ASSY PITCH CONTROL PCB ASSY DIGI AL TRAN SISTOR SENSOR PCB ASSY I l OPERATION SW PCB ASSY REMOTE D i CONNECTOR PCB ASSY o IO 1 IRED r c fu H ti S 71 S...

Page 37: ...REC AMPL PCB ASSY PLAY AMPL PCt B T JOINT PCB DIG ITAL TRANSISTOR E 35 8...

Page 38: ...SSY BT CONTROL PCB ASSY JOINT PCB ASSY M 2 r co r Il a r oo to C Cl SENSOR PCB ASSY ADJUSTMENT SW PCB ASSY COUNTER SW PCB ASSY ADJUSTMENT VR PCB ASSY...

Page 39: ...122MKH VR PCB ASS MOTHER PCB ASSY I N I 37...

Page 40: ...122MKn METER PCB ASSY MONITOR SWITCH PCB ASSY DIGITAL TRA NSISTOR HEADPHONE PCB ASSY E I N o C IN C E BAL AMPL PCB ASSY POWER SW PCB ASSY 38...

Page 41: ...14013BP U505 5220020200 IC TC4030BP U506 5220017200 IC HD14069UBP U507 5220418800 IC M5218P U508 5232252520 TR DIGITAL RT1N241S U509 5232252520 TR DIGITAL RT1N241S U510 5232252520 TR DIGITAL RT1N241S...

Page 42: ...6139400 Tl5 T251 5286025700 TP12 P22 5544750000 TP13 T 3 5544750000 U151 5220414300 U152 5220414300 U153 U253 5232252520 U154 U254 5232252520 U155 U255 5232252520 U156 5220427000 U157 U257 5232252520...

Page 43: ...77 LED TLR226 CON PLUG 5089 8A CON PLUG 5129 5A CON SOCKET SW PUSH 3G SPUZ32 LBWLB SW PUSH 3G 5PUZ32 SRS TR DIGITAL RT1N241S TR OIGITAL RT1N2415 TR OIGITAL RT1N241S TR OIGITAL RT1N2415 ADJ VR PCB ASSY...

Page 44: ...R DIGITAL RT1N241S Ul05 5232252520 TR DIGITAL RT1N241S U106 5232252520 TR DIGITAL RT1N241S UW7 U207 5232252520 TR DIGITAL RT1N241S Ul08 U208 5232252520 TR DIGITAL RT1N241S Ul09 U209 5232252520 TR DIGI...

Page 45: ...J102 J103 J105 P101 S101 5200218500 5210218500 5225016500 5336115600 5336116100 5122373000 5336128500 5300043400 MONITOR SW PCB ASSY MONITOR SW PCB LED PR5551K CONNECTOR SOCKET CONNECTOR SOCKET CON SO...

Page 46: ...I 9 IC INTERNAL BLOCK DIAGRAMS Ie 7 7 7 1 v lf 7 b BA843 f RMNZ8178 Ul u u t J UJ u Q Q u a 0 0 0 0 0 0 0 I R5 R I R4 R R2 R3 R7 o I I z I I I I I TC4011BP TC4001BP Voe Voo V S Vss TC4030BP LC4066B Vo...

Page 47: ...Vee OUTPUT INPUT INPUT v v v uPC1297CA OUTPUT INV NON INV Vec INPUT INPUT AMPLlF IE R I M521 8P CX20187 RT1N241S D RT1P241S a i 0 0 0 w x 0 w r I r u u u w z aJ a w z a u u u a z w 2SA 1527 r r I f 3...

Page 48: ...l I ill ill t I 51 pfi 700 rroJ llJ m 1 I 142 6 1IIiS 0862 25 8601 iA PJj 733 IZ I m IR ill II Q lilT 13 19 reZi 082 29 4 47 5 1ff J I3 J itt M fjj 812 Iii p j m Iii 1 JI 7i 2 2 24 II li 092 431 578 1...

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