TANDBERG 3000 X series, Service Manual

Page 1: ...TANDBERG Series SOOOX SERVICE MANUAL ir I t ll I TANDAERG oc reCOAO LEEL ryr A q r ruc t TANDBERGS RADIOFABRIKK A S...

Page 2: ...A a...

Page 3: ...1 1Record Head 7 1 2 Erase Head 7 1 3Playback Head 7 2 Modell 3021X 7 2 1 Erase Head 7 2 2 Record Head 7 2 3 Playback Head 8 0 ADJUSTMENTAND CONTROL OF THE AMPLIFIERS 11 8 1 1PlaybackLevel Adjustment...

Page 4: ...ERANCE 1 50 0 HEADS Separateheadsfor erasure recording playbackand bias TandbergCross field FREQUENCYRESPONSE 7t z ips 40 20 000 Hz 2dB 33 r ips 50 16 000 Hz 2dB 17e ips 50 9 000Hz 2dB Measuredto DIN...

Page 5: ...T and RIGHT Minimum load impedance 100 ohm Output level A tape recorded with 400 Hz signal at 0 dB level gives approx 0 75 V in playback HEADPHONES stereo jack for connection of headphones Stereo jack...

Page 6: ...screw A as shown in fig 2 1 2 1 2Take up Turntable Fast Forward Winding Torque The torque is read in table fig 2 3 pos 3 lf the torque deviatesfrom the specificationsin the table check and if necessar...

Page 7: ...Pos 3 909 250g t I 264930 99101 Fig 2 6 2 2 Brakes See fig 2 6 Set the operating lever to Normal Forward drive position Check that the clearance between the brake pad and the turntable is approx 1 mm...

Page 8: ...complished by tightening or slackening the spring 243990 See lig 2 12 Fig 2 10 2 4 2 Adjustmenl of Tape Feeler See fig 2 11 and 2 12 Set the operatingleverto Normal Forwarddrive posi tion The mainsswi...

Page 9: ...st 3 feet away from the tape recorder 3 2 Bias and EraseCircuits 3 2 1 Oscillalor Frequency Connect a calibrated long wave receiver tuned to 256 5kHz frequency meter or frequencycounter to the oscilla...

Page 10: ...anismis engaged The tape must however by no means bulge at the flanges 4 2Mechanical Adjustment of TapePath Prior to the electrical adjustmentof the heads it is essential to make the tape run without...

Page 11: ...ard drive position and check that the head fronts of bias and record heads are parallel ll necessary bend the arm of the bias head as required 5 3 2 Height Adjustment Set the tape recorder in stereo r...

Page 12: ...by the azimuth adjustment screws K The erase head should be parallelwith the mounting plate for the heads The azimuthpositionof the erase head is not critical 6 5 Model 3021X The alignmentsspecified...

Page 13: ...o recording Adjust the Record Level Control to 75 mV deflectionon VTVM Adiust R501to maxi mum deflection on left channel VTVM and R502to maximumon right channelVTVM Note The 2 lrack model is also equi...

Page 14: ...level 400 Hz The output levelsof the two channelsshould not at any frequency differ by more than 3 dB 9 1 Readjustmentof Record Playback level For readjustments of Record Playback level ref paragraph...

Page 15: ...recorder for stereo recording Set the level30dB below0 dB indicatordeflectioni e 10 dB down by meansof RecordLevelControls 20dB down on signal generator and use 400 Hz as reference on VTVM deflection...

Page 16: ...500 1000 2000 s000 10000 c413 R426 c4r5 R430 c414 R429 c 4t6 c417 R 10 10 Th ac 11 w1 m ilr 50 60 W I O 33ii ips O l7l8 ips dB 6 t 2 0 6 L 2 0 6 t 2 Fig 9 4 Record curves 20Hz 50 lO0 2m 5OO IOOO 2000...

Page 17: ...on models above serial No 2733300 10 3ComponenlModification in Series 3000X O Transistor Q503 is changed from type BC147B to BC107B Resistor R505 is changed from 2 2 kohm to 1 kohm Both modifications...

Page 18: ...TNUMBERS 264248 261655 991038 260 00 264435 261303 264786 274535 2633 269255 272854 260641 268 277523 262984 264665 VEBT 261655 I I t 263688 262322 r MOIjNT 262M4 TEAK 264564ROSEWOOD 269 2 WALNUT 2629...

Page 19: ...841 991008 219816 260361A 991010 264083A 261805A 2r8767 261841 991033 991034 219816 991035 991009 215053 20a013 5 r N 16l 204013 _____________ T t 6t Z Fig 12 2 Supply turntable Fig 12 3 Take up turnt...

Page 20: ...2 25 21 204013 214895 990334 214895 204013 266791 207977 Fig 12 4 2622s8 260577 Pressure roller arm assembly 229565 263939 202r5r 207977 267768 202309 2610948 265060A 266087A 247941 nn u z4s so 24 13...

Page 21: ...66797 EU LTS 6ri 2 I u3trir c t tl I rruoc I zt cqsgI zacjz o 991028 261460 2 3939 230183 269801A zegqtz 21i7416 Fig 12 6 Tape path and ptessureroller arm aaIooaaa aoa L i L IANOB iC IA R COiOER rcm 3...

Page 22: ...version 991402 264996 991046 260620A 2657354 212036 264578 262739 263888 211339 395 260289 254779 2e Zl 252715 252496 241009 236159A 2490688 Bottom view O T N08eRe TAPT R COqO R tooEl Jar r I volls t...

Page 23: ...0045 20L95 2605L2 263601A 991 014 262L93 99101 224795 25952 R 108 R 208 211418 12 10 267476 249630 Fig 991013 240276A 266741 264270 263709 273134 263932 265060A 268422 2649 3 I 034 9903 12 I 014 2605L...

Page 24: ...w olrrq Washer 7 5 x 4 2 X 0 5 mm Delrin roller for indexingeccent segment Clamp for mains cable Spring for transfer wheel arm Adjustmentscrew for bias head 3X18mm Pulleyfor revolutioncounter Shaft f...

Page 25: ...playback leuelindicator Side plate right Tape support right Contact spring Tape tightening disc left Spring brake lever left and right Bearing for flutter filter Front panel Knob for operating lever...

Page 26: ...crew for vertical mount Upper side plate left Rubber foot for vertical mount Terminalplug 7 pin main ampl board Spring for tape brake arm Post lor pressureroller arm spr Bracket for turntable brake Re...

Page 27: ...plyturntable Rightclutch disc Left clutch disc R L clutch lever w screw R L brake lever w screw Releasingarm w pulling rod Arm for clutch and brake slide Cueingarm Leftturntable brakespringw pad Right...

Page 28: ...mm 3x3mm 3X4mm 3X5mm 3X8mm 3X8mm 3x10mm 3X10mm 3X10mm 3x12mm 3x15mm 3X18mm 3X20mm 4X6mm 3 16 No 4 114 No 4 1 4 No 4 1 4 No 6 3 8 No 4 1 2 No 2 5 8 No 6 3 4 No 4 7 8 No 6 Washers 230542 239651 204105...

Page 29: ...00x D503 3000x D504 3000x 1N 4148 1N 52548 1N 4148 Zener diode 27 Y TRANSISTOR REF NO C EE JC E 6 otB e_ E o ltB e l c E l E G t olB 9 l c A 9 c G l tc E C8 u E CB l 1 Q101 Q102 Q103 BC149B BC149C BC2...

Page 30: ...lizing amplifiers level indicator amplifiers and booster amplifiers Printedside T l f 1 l f F r l s F 1 l lof l l l l l l F l I 1 t_ fiHtr g g1T t6 i ff ffi ir1 6 rA e5 I fl iffira H gl 3i e f md b f...

Page 31: ...FstP Eil d h LGS6tFr llli p q c16 LIE F l tF q I qt e26 ta r llF iFtJ ffi n tJF oo 19 a6 c 191 V ra l L P rr t LfFEfrJ aa t L J aa l L EEIJ qn6JJ 6666d tll 4 lffi F la f T rtE l h leF l trh a cro5 O F...

Page 32: ...Boardfor mic lire amplifiers bufferamplifiers oscillator biasand DC voltageregulator Printed side 6 C...

Page 33: ...caro t I I cros 2l c4l6rr ilc4t7 0 01 0 01 Li3 c309 N c3 r7 00r RECORD HEAO L Qa0 8Clal 85 5 kHz LEVE tNo E oq o301 8Cr47 I c4l3 I C415 0 022 l i l q0 2 1r jEL 42 REC LEVEL c201 _170 Q 204 8C r478 0 0...

Page 34: ...1000 oHMS M 1m0000oHMS VOTIAO s GIVENIN PARANTHESIS REftR IO R CM POSrIlOfl RIGAI TEFI SI CHES ARE sffi IN T iIOPERATEO POSITIOII z3 t 1r Q a S10l 5102 541 sSor s3o2 slo3 6 EOUALIATION SWITCH EE ffif...

Page 35: ...l I 55 tEvFL r rNo l G RECORO HEAO L L13 t8 TOR 85 5kHz LEV L IND o1o3 tt ott Ea aaue AOJ L 35 liml _ i rE t R Cat3 f C415 o oxlT T Tqcrr lf EL op srcr StAS HEAO L RASE EAD t ERASE EAO atas HEAO e 8C...

Page 36: ...CATEOIN PF UIESS O IHERWISE SPEClFlEo rr l0000mpF RESISTORS INDICAIEO IN OtMS UNLCSS OTI RWSE spEctFrEo k r0m oHMs il lmo 000 oHMs VOLIAGES GIVEN IN PARANTH SIS REER TO RECOFD POStTtON RECORD flrP ob...

Page 37: ...evel indicator amplifiersand booster amplifiers Printedside Input and output terminal board for channel L Printed side Inputand output terminalboard for channelR Printedside lLowtNl Lr t i L eCi ilrdt...

Page 38: ...t I Tandbergs Radiofabrikk A S Kjelsas Tandbergs Radiofabrikk A S div Kjeller TANDBERGS RADIOFABRIKK A S P O B 9 Korsvoll Oslo 8 Norway r...