Tascam 122mkII User Manual
Contents
1. If pins 9 and 11 of this connector are short circuited the tape transport of this machine will enter the PAUSE mode and if they are open the transport will enter the PLAY mode A 12 pin connector case assembly is optionally available Part No 5772919500 Operation icr RE ERR RE EE RECORDING Ts Press Plug line level sources into the FRONT and or REAR INPUT jacks Select the input source via 1 4 phone RCA or XLR type jacks by setting the INPUT select switch on front and INPUT select switch on rear to the corresponding position If necessary adjust BIAS and LEVEL ac cording to the tape Set the DOLBY NR system switches to the desired positions Press the OUTPUT select switch to the IN PUT down position This will allow you to monitor the input signal in the VU meters and headphones Use the L and R INPUT control knobs to ad just the signal of the respective channel to the appropriate level The nominal setting position is between 7 and 8 on the knob scale Using the REPRO switch return the transport to the REPRO mode The meters will stop read ing the input signals at this point until the transport is switched to the Record Ready the RECORD and PLAY buttons together to initiate recording Alternatively in the Sync mode you can press the RECORD and PAUSE buttons together This will put the deck into Record Ready mode allowing you2. ven A owas 9 To Make Professional Quality Recordings 10 Dolby HX ixuteusexnhimdasqaoEmE c 11 Care and Maintenance 55525554 ve Ree heen a T2 Degaussing Demagnetizing T3 uu y beca v CORE 14 4 eas Raa ORES OE 16 eee areas d oes 17 External Dimenstobls 66 sees sw km rr ER 17 Dolby noise reduction and HX PRO headroom ex tension manufactured under license from Dolby Laboratories Licensing Corporation HX PRO originated by Bang and Olufsen Dolby the double D symbol and HX PRO are trademarks of Dolby Laboratories Licensing Corporation cassettes use thicker and more durable tape A short recording on a long cassette will force you to waste the unused portion of the tape if you choose to protect your master by removing the safety tabs Shortest is best 3 USE HIGH QUALITY TAPE FOR BEST RESULTS For best results we strongly recommend the use of high quality tape Remember you will probably spend a lot of time and energy working on your material Don t compromise use the best The improvement in your re cordings will amply justify this small extra expense Voltage Conversion HM UEM ACERO SOUND DUE TIR UL RETO S COEPI a pM 2 3 5 V 4 REMOVE THE SAFETY TABS OF THE CASSETTE WHEN RECORDING IS OVER This unit is adjusted to operate on the elect
3. 9 INPUT L R 1 4 Jacks Front Easily accessible this pair of 1 4 jacks allow quick patching repatching of the line level signals comming from other equipment Nominal input level is 10 dBV 0 3 V Minimum input level is 18dBV 126 mV OUTPUT L R XLR jacks These balanced connectors provide with the following output characteristics Nominal output level is 4 dBm 1 23 V Minimum load impedance is 10 k ohms signals INPUT SELECT switch XLR RCA PIN This switch selects either XLR type or RCA jacks on the rear panel for recording D INPUT L R XLR jacks Rear This balanced connector has the following input characteristics Nominal input level is 4 dBm 1 23 V Minimum input level is 4 dBm 0 49 V OUTPUT L R RCA Jacks Use these RCA jacks to feed the signals from the 122 to your mixer receiver amplifier etc Nominal output level is 10 dBV 0 3 V Minimum load impedance is 10 k ohms INPUT L R RCA Jacks Rear Electrical characteristics are the same as the front input jacks nominal input level is 10 dBV 0 3 V Minimum input level is 18 126 mV REMOTE CONTROL Connector This multi pin connector is for the optional TASCAM RC 71 Remote Control unit which duplicates the transport controls 1 l J 12 PUL SE TURN I 5 qucm meet Exc or ee S LO ans i
4. TASCAM cable is available in lengths from 6 inches to 20 feet or in color coded sets of 8 for fast channel or function identification TASCAM cable is also available 500 foot spools If TASCAM professional cables are not available in your area please try to find the next best cables It really does make a difference in system performance Specifications EL PENES Vu E TENNIS UT ON T A CUM MUR CM MIN EPUM NLIS IMMUNE CMCMK CONUS UEM Ug MECHANICAL Tape Track Format Tape Speed Speed Accuracy Pitch Control Wow amp Flutter Fast Wind Time Motor Head Configuration Dimentions W x H x D Weight ELECTRICAL Line Input XLR Input Impedance Nominal Input Level Minimum Input Level Line Input 1 4 and RCA Input Impedance Nominal Input Level Minimum Input Level Line Output XLR Minimum Load mpedance Output Impedance Nominal Output Level Maximum Output Level Line Output RCA Minimum Load Impedance Output Impedance Nominal Output Level Maximum Output Level Headphone Output Bias Frequency Equalization Recording Level Frequency Response2 Total Harmonic Distortion THD 2 Signal to Noise Ratio2 Reference 3 THD Adjacent Channel Separation2 Erasure2 Power Requirements 0 5 EUROPE U K AUSTRALIA GENERAL EXPORT Power Consumption Philips type cassette C 60 and C 90 4 track 2 channel stereo 4 8 cm s 1 7 8 ip
5. NORMAL r 12 1 d 8 METAL TAPE ERASE 297mmi11 11 16 h 1amm 3 4 272mmf 10 11 16 127 5 TASCAM TEAC Professional Division 122 MAIN OFFICE 3 7 3 NAKACHO MUSASHINO TOKYO PHONE 0422 53 1111 TEAC CORPORATION SALES OFFICE 4 15 30 SHIMORENJAKU MITAKA TOKYO PHONE 0422 45 7741 TEAC CORPORATION OF AMERICA 7733 TELEGRAPH ROAD MONTEBELLO CALIFORNIA 90640 PHONE 213 726 0303 ME Oe 0 CANADA LTD 3610 NASHUA DRIVE UNIT 1 8 2 MISSISSAUGA ONTARIO L4V 112 PHONE 416 673 3303 TEAC AUSTRALIA PTY LTD 115 WHITEMAN STREET SOUTH MELBOURNE VICTORIA 3205 PHONE 699 6000 PRINTED IN JAPAN 0991U2 D 51520
6. Sequences 8 Turn the REC LEVEL trimmers so that the VU meters read O VU 9 While recording alternate the oscillator signal between 10 kHz and 400 Hz adjust the BIAS trimmers by rotating clock wise so that the VU meters show the same level at both frequency If you use different type of tape you will experience different performance and charac teristics particularly at high frequencies and you may have to readjust BIAS 10 Set the oscillator signal back to 400 Hz and adjust the REC LEVEL trimmers so that the VU meters read O VU T Dolby HX PRO Dolby HX Pro is an active bias technique that can improve the quality of audio tape recordings High level high frequencies can be recorded more accurately without sacrificing signal to noise ratio while such side effects of tape saturation as distortion are reduced What Is Bias Bias is a very high frequency signal generated within a tape deck and recorded on the tape simultaneously with the program material This inaudible signal allows a low noise low distortion recording and flat frequency response Different magnetic tape formulations require different amounts of bias for optimum perfor mance If the bias level is too high high fre quency Maximum Output Level MOL de creases The Problem of Self Bias Unfortunately bias level is often influenced by the signal being recorded The high frequencies contained in some music a
7. pinch roller Make certain that there is no foreign matter remaining on either the pinch roller or the capstan shaft Cleaning the Capstan Shaft After cleaning the pinch roller clean the capstan shaft Lightly press a cotton swab moistened with head cleaning fluid to the rotating capstan shaft DEGAUSSING DEMAGNETIZING A little stray magnetism can become quite big nuisance in tape recording It only takes a 13 iii ei A 2 Grasp the two sides and to remove the cover small amount 2 Gauss to cause trouble on the record head Playing 10 cassettes will put about that much charge on the heads A little more than that 7 Gauss will start to erase high frequency signals on previously recorded tapes Y ou can see that it s worth taking the trouble to degauss regularly DEGAUSSING IS ALWAYS DONE WITH THE RECORDER TURNED OFF If you try it with the electronics on the current pulses produced by the degausser will look just like audio signals to the heads These pulses are around 10 000 Gauss and will seriously damage the electronics and or meters Turn off your 122 then turn on the degausser at least 1 m 3 feet away from the recorder Be certain that your degausser has either a plastic cover or plastic tape covering the tip Make sure that no metal ever touches the tape heads as it will scar them and ruin them Slowly move in to the tape path Move the degausser slowly back and forth touching li
8. will be en abled whenever the transport enters Record mode causing this indicator to light The system remains activated when recording is Du uu E 23 REMOTE CONTROL ss sss PAUSEd and the details on Dolby HX PRO see page 11 indicator remains lit For Cassette Holder Press the EJECT button to open the cassette holder Q PITCH CONTrol with PUSH ON Button Indicator The pitch control is active only when the PUSH ON button is engaged LED on Variable range of the speed is plus or minus 12 either in play or record mode NOTE Make sure that the PITCH CONTrol is deactivated LED off when no pitch adjustment is required Q Transport Controls This group of buttons controls the tape motion and the in out switching of the record circuit The optional Remote Control unit will duplicate this group of controls When the Remote Con trol unit is connected both sets of controls are active at the same time PLAY Button When pressed causes the tape to run from left to right initiating playback If pressed simultane ously with the RECORD button initiates record ing If pressed from Record Pause mode re sumes recording m STOP Button When pressed stops the tape motion and releases all transport functions including PAUSE F FWD Fast Forward Button When pressed winds the tape at high speed the transport mechanism automatically stops when the tape is fully wou
9. CTRIC SHOCK A OR BACK NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO SE QUALIFIED SERVICE PERSONNEL The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated dangerous voltage within the product s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons The exclamation point within equilateral triangle is intended to alert the user to the presence of important operating and maintenance Servicing instructions in the literature accompanying the appliance This appliance has a serial number located on the rear panel Please record the model _ number and serial number and retain them for your records i Model number Serial number a SaL A TCR UPON a RA WARNING TO PREVENT FIRE OR SHOCK HAZARD DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE emu Introduction The TASCAM 122 is a professional rack mount cassette deck designed to offer outstand ing audio performance and convenience features The highly accurate transport is under full logic IC control that offers the convenience of Memory functions including Return to Zero Search to Cue and block repeat Dolby HX Pro enhances the high frequency audio performance of the 122 Mk II and a full range of calibration features ensur
10. T Button When TRT is pressed the display changes from an Index count to Tape Run Time press again to display an Index count Note When TRT is used set the 50 60 cycle adjustment located on the bottom of the machine to match your area Q RESET Button The RESET button will clear the dispaly caus ing it to show 0000 RESET also cancels any MEMORY position MEMORY Function and ZERO RETURN Switches When used separately or together these switches activate a variety of very helpful computer controlled transport functions The LED in dicator lights will show you which functions are in use at any given time MEMORY Switches ENTER This switch marks the current position of the tape and locks it into memory for auto matic stop or rewind use STOP Using this switch will cause the tape to stop when it reaches the memory position no matter what mode except RECord the trans port is in ie Play Rewind or Fast Forward REWind If this switch is pressed the tape will start to rewind when it reaches the memory position This function won t work in RECord or if the tape transport is already in Rewind OFF This switch turns off the MEMORY func tions ZERO RETURNS Switches STOP During Rewind the tape will stop at the zero position when this switch is used PLAY This switch functions during Rewind or Fast Forward modes The tape will enter the PLAY mode when the zero position is reached OFF This switch turns off b
11. TASCAM TEAC Professional Division 122 1 Master Cassette Deck E n L1 b t LJ JL s 5 OWNER S MANUAL 5700091800 The guarantee of performance that we provide for the 122 Mk II must have several restrictions We say that the recorder will perform properly only if it is adjusted properly and the guarantee is that such adjustment is possible However we cannot guaran tee your skill in adjustment or your technical comprehension of this manual Therefore if you open up the 122 Mk II and your attempts at such things as rebias and record EO trim are unsuccess ful we must make a service charge to correct your mistakes Recording is art as well as a science successful recording is often judged primarily on the quality of sound as art and we obviously cannot guarantee that A company that makes paint and brushes for artists cannot say that the paintings made with their products will be critically well received The art is the province of the artist TASCAM can make no guarantee that the 122 Mk II by itself will assure the quality of the recordings you make Your skill as a technician and your abilities as an artist will be significant factors in the results you achieve THE APPLIANCE CONFORMS WITH EEC DIREC TIVE 87 308 EEC REGARDING INTERFERENCE CONFORME AL D M 13 APRILE 1989 SUPPRESSION DIRETTIVA CEE 87 308 CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER RISK OF ELE
12. Tape MTT 111 d T 2 Specifications were determined using TEAC Test Tape METAL MTT 5571 MTT 5561 NORMAL MTT 5511 Changes in specifications and features may be made without notice or obligation 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 Block Diagram k DOLBY N R DECODER P eo Q Q 1 20 Vec T r E OUT B 4 INPUT SELECT Hes US NE INPUT 172 5 XLR 4dBm BAL 3 SECHS e RCA INPUT Ra eee me a penne eee me pee em em E AR Eos 4 INPUT EAR INPUT FRONT 27 0 FRONT DOLBY N R es E ENCODER 05 Vec 400Hz710kHz Y 4 DENN be f MPX FIL l din ADJ pin psc 1 my 1 0 10 lo External Dimensions 482mmi19 459mm 18 1 16 438mm 17 1 4 521 BB il e DOO 275 8 t oroo amp 0 aad ae 4dBm BAL OUTPUT OUTPUT O IOOmw 8f MAX PEAK LED Td 1 1 2 pd Vee 41 9 OUTPUT REC HEAD Ncc o
13. ct as bias This un predictable source of bias is added to the exist ing bias resulting in a loss of high frequency response As the high frequency content of the signal increases the ability of the recorder to record high frequencies MOL decreases This phenomenon is called self biasing The Dolby HX Pro Solution The Dolby HX Pro monitors the high frequency content of the program material and adjusts the recorder bias oscillator to maintain a con 40 20Hz 50 100 200 500 2 10 20k A typical example of effect of Dolby HX pro with normal tapes stant total bias level The result is improved high frequency response and lower distortion Depending on the type of tape the improve ment in headroom can be 6 dB or more The Benefits With Dolby HX Pro it is easier to make more accurate recordings of the kind of music which Care and Maintenance SS a RT a PL IE SY ZR UM EESE TES TET IK ESET BI 50 22 Even though the heads used in your 122 Mk II have high wear resistance and are rigidly con structed performance degradation or electro mechanical failure can be prevented if main tenance is performed regularly CLEANING The first things you will need for maintenance are not expensive The whole kit with the swabs and fluids you will need for months will cost less than a couple of high quality cassettes We cannot stress the importance of cleaning too much Clea
14. e that your 122 MkII will always deliver the optimum in audio from the cassette format A built in oscillator 400 Hz and 10 kHz along with in dividual Bias and Level controls can be used to maximize performance with any tape type Cue and review is possible and the 122 3 head configuration produces real time monitor ing The 3 head design also makes the indepen dent azimuth adjustment of the record and re proheads possible Rear panel balanced XLR and unbalanced RCA connectors are supplemented by front panel phone jacks for easy rack mount repatching An optional RC 71 Remote Control Unit is available Precautions and Recommendations 1 THE USE OF C 120 CASSETTES IS NOT RECOMMENDED The extremely thin tape used in C 120 cassettes can lead to winding troubles crimp ing wrinkling and other damage to the oxide coating which will destroy your work 2 USE THE SHORTEST POSSIBLE TAPE FOR A GIVEN JOB It is not unusual to play a tape numerous times before you achieve the most satis factory result so select a cassette length that is as close as possible to the length of the program you plan on recording The shorter TABLE OF CONTENTS Precautions and Recommendations 3 Note for U K Customers 4 Voltage Conversion Lois sa ma nes 4 Features and Controls 5 Operation P TE TET TR TOTTTCITTUT TIT 9 9 Era ngogs
15. ghtly all metal parts in the tape path Slowly move it away again to at least 1 m 3 feet from the recorder before turning it off Be sure to concentrate while you are degaussing Don t try to hold a conversation or think of anything else but the job you are doing If the degausser is turned on or off by accident while it is near the heads you may put a permanent magnetic charge on them that no amount of careful degaussing will remove You will have to get the heads replaced Make sure you wide awake for this job A clean and properly demagnetized tape re corder will maintain its performance without any other attention for quite a while It won t ruin previously recorded material nor will getting it back to original specifications be dif ficult CAUTION If the surface of the unit gets dirty wipe the surface with a soft cloth or use a diluted neutral cleaning fluid Clean off thoroughly Do not use thinner benzine or alcohol as they may damage the surface of the unit A 2 Accessories E CITUR DIU ELS TSS n TET TALS TIE ET ET RC 71 Remote Control Unit The RC 71 is designed for remote control of the transport functions 109B Input Transformer The TASCAM 109B Input Transformer is an adaptor that matches balanced low impedance microphones with XLR connectors to un balanced high impedance 1 4 phone jack inputs This adaptor enable
16. imply press the switch corre sponding to the tape loaded D MPX FIL Multiplexer Filter Button Use this filter when making Dolby recording of FM broadcasts pressed IN eliminates the pilot tone 19 kHz and subcarrier tone 38 kHz programs contain Otherwise the Dolby noise reduction system will not function cor rectly To release this function press the button again to the O OUT position DOLBY NR IN OUT Switch When the button pressed to the IN position either Dolby B indicator will light showing which type of circuit is in effect If pressed again to the OUT position it will release all noise reduction circuits DOLBY NR B C Select Switch This button is active only when the adjacent IN OUT button is in the IN position and is used to select either built in Dolby Noise Reduc tion circuits Selection is indicated by either the indicators Dolby B or Dolby C being lit above the button D PHONES Level Control and Jack This knob is used to adjust the listening level in the headphones plugged into the PHONES jack The recording level heard in the headphones is also affected by the setting of the INPUT level control The setting of the PHONES level control does not affect the VU meters nor does the OUT PUT level CAUTION Use only stereo headphones Mono 2 wire headphones will cause circuit failure em 4 21 mf 1 4 phone 2 1 4 phone 3 connector
17. le as foam core dielectrics but far more resistant to extreme cold or heat and it doesn t let the center strands migrate It also avoids the possibility of shearing the center conductor when the cable is crushed so the cable does not suddenly fail Rather than loosely braided shield or spiral wrapped shield that can open up we use bare copper braided shield with 97 coverage This excludes electrostatic noise buzz and RFI CB interference etc We also use a 7 strand center conductor 4 pure copper strands for minimum resistance and 3 copper weld stainless steel strands for strength The multiple strands increase flexibility and strength while offering less resistance at ultra high frequencies due to increased surface area for the skin effect This improves transient response The outer PVC insulating jacket resists abrasion and is tightly fitted to the shield so it will not elongate The connectors are special too Their nickel plated brass center pins are a bit longer than most to establish good contact in all RCA jacks The cadmium plated steel outer shell includes a gentle ridge which burnishes the mating jack when the connector is twisted to ensure good contact For maximum RF shield ing the braid is terminated inside the shell and 2 radian soldered not just spot soldered for maximum strength The plugs are clad with an oval jacket of molded plastic to further in crease strength and make the ends easier to handle
18. n this mains lead are coloured in Bescheinigung des Herstellers Importeurs accordance with the following code Hiermit wird bescheinigt daB der die das BLUE NEUTRAL BROWN LIVE urs of the wires in the mains lead of us may not correspond with the ifying the terminals in As the colo this apparat coloured markings ident your plug proceed as follows s coloured blue must Se i ich i ked with the the terminal which is mar h th coloured BLACK The wire which ise d BROWN must be connected to the Eon which i marked with the letter L of t coloured RED MAGNETTONBANDGER T TASCAM 122 MkII ow Ri gt sil pa Geral Typ Bezeichnung in bereinstimmung mit den Bestimmungen der AMTSBLATT 163 1984 VFG 1045 1984 Amtsblattverf gung funk entst rt ist Der Deutschen Bundespost wurde das Inverkehrbringen dieses Ger tes angezeigt und die Berechtigung zur ber pr fung der Serie auf Einhaltung der Bestimmungen einger umt TEAC CORPORATION Name des Herstellers Importeurs Features and Controls OUTPUT INPUT POWER Switch This switch controls the AC power to the deck When power is turned on lamps in the VU meters and cassette compartment will light while the digital counter will indicate O EJECT Button When pressed in STOP opens the door of the cassette holder DO HX PRO Indicator The built in Dolby HX PRO system
19. n up before each session Clean up after every session Clean up every time you take a break in the middle of a session Here s why 1 Any dirt or oxide build up on the heads will force the tape away from the gaps that re cord and playback This will drastically affect the response Even so small a layer of dirt as one thousandth of an inch will result in degraded performance All the money you have paid for high performance will be wiped out by a bit of oxide Wipe it off with head cleaner and you re back to normal 2 Tape and tape oxide act very much the same way as fine sandpaper The combination will slowly grind down the tape path If you do not clean off this abrasive material on a e contains high level high frequencies The im provement is similar to that of high performance tape over conventional tape so regardless of the type of tape used the results will sound better Most important of all Dolby HX Pro requires no decoding process Once the tape is recorded with it the improvements will be realized when playing the tape back on any machine regular basis the wear will be much more rapid and will become irregular Even wear on heads can be compensated for with electronic adjustments for a while but uneven wear can produce notches on heads and guides that will cause the tape to skew and skip around making adjustment impossible This ragged pathway also chews up the tape producing more abrasive material
20. nd If pressed simultane ously with the PAUSE button will cause the tape to remain in contact with the heads This allows the reproduce signal to be heard in fast motion for cueing provided that the OUTPUT INPUT REPRO switch is set to REPRO lt REWind Button When pressed rewinds the tape at high speed The tape will automatically stop at its end or at counter 0000 if the ZERO RTN function is used If pressed simultaneously with the PAUSE but ton with the OUTPUT select switch set to REPRO will enable reverse cueing e RECORD Button This button by itself cannot activate the record circuit To start recording the RECORD button mu t be pressed simultaneously with the PLAY button Alternatively press the RECORD simultaneously with the PAUSE button This puts the deck into Record Ready mode and re cording can start with a one button PLAY command PAUSE Button Use this button to stop the tape temporarily during the process of record or playback To resume record or playback press the PLAY button alone COUNTER TRT Display Tape counter is useful for locating any specific point a tape It counts up when the tape is moving forward from left to right and counts down when the tape is moving in reverse In the TRT mode the display shows the tape run time in minutes and seconds It will not sequence to a lesser value TRT is useful for measuring the running time of particular program Q TR
21. o the speakers e Bias can be calibrated for only one type of tape corresponding to one setting of the TAPE selector at a time When the calibration switch is set to ADJust in the last calibra tion is effective Whenever you calibrate bias note which type of tape it corresponds to for easy reference When the BIAS and the RECORD LEVEL are being adjusted with the OSCillator in corporated in this machine the sensitivity of the VU meter will be raised by 20 dB Preparation e he controls and switches of 122 Mk II should be set as follows Sos ters s aee ques ON INPUT ey eds kw Left and Right both O OUTPUT Level Position 8 OUTPUT Selector INPUT 3 Galt OUT DOLBY OUT MEMORY ZERO Selector Select the type of tape being used a Adjustment sequence 1 Put the deck in the record pause mode by pressing the PAUSE and RECORD buttons 2 Press the OSC button and set the signal to 400 Hz n position then press the ADJ switch 3 Set the INPUT level controls so that the VU oc meters read O VU Start recording by pressing the PLAY button set the OUTPUT selector to REPRO Turn the BIAS trimmers fully counterclock wise Slowly turn the BIAS trimmers clockwise so that the VU meter needles deflect to the peak value adjust one at a time Bias Level Adjustment
22. oth STOP and PLAY Combining the use of the ZERO RETURN and MEMORY functions This combination is most commonly used to create a Loop When ZERO RETURN PLAY and MEMORY REWindare used together 122 Mk II repeatedly play back the section of tape between zero and your memory position If ZERO RETURN STOP and MEMORY REWind are used together the tape will begin rewind when it reaches the memory position and will stop when it rewinds to zero ZERO RETURN switches take priority over MEMORY switches So that if the MEMORY position corresponds to zero as is the case when the power is first turned on only the ZERO RETURN switches will have effect if both functions are on BIAS LEVEL Trimmers and ADJustment Switch The factory preset bias and recording levels are average values for the three types of tape normal chromium dioxide CrO and metal For pre cise calibration of the bias recording levels to exactly match the tape being used set the button to the ADJust position and adjust the trimmers using a screwdriver This procedure is explained in detail on page 10 To record again using the bias and recording levels which you set previously set the button to the ADJust position If the switch is left in the off up position the factory preset bias re cording levels will be selected D OSCillator and 10 kHz 400 Hz Signal Selector Switch Press OSC button to get 10 kHz position or 400 Hz O position oscilla
23. ounterclockwise minimum position or with all input signals unplugged To Make Professional Quality Recordings BIAS AND RECORDING LEVEL CALIBRA TION Tapes differ considerably in the bias required to record on them and in their sensitivity Different types of tape are available normal ferric chrome cobalt ferrichrome metal Within each type there are differences between tapes from different manufacturers even the same type of tape from the same manufacturer can differ between production lots Because of these fairly wide differences setting the TAPE selector so as to obtain a factory preset value of bias and using the standard reference recording level may not result in recordings of a consistent quality The TASCAM 122 Mk II allows fine adjustment of bias to exactly match the tape being used also the reference recording level can be precisely adjusted to compensate for differences sensitivity so that a flatter recording playback frequency response can be obtained By adjust ing calibrating to obtain precisely the correct levels for every tape performance is optimized e Before starting adjustment be sure to clean the heads tape guides rollers etc and demagnetize the heads and all metal parts in the tape path using the TEAC Recorder maintenance kit and E 3 Head Demagnetizer e f you make adjustment while monitoring through speakers turn down the volume of the amplifier to avoid possible damage t
24. ric voltage specified on the unit or packing carton 3 1 4 When you are pleased with the recorded NOTE This voltage conversion is not possible 4 tape you have just finished make sure to re on models sold in the U S A Canada U K 5 move the safety tabs of the cassette With Australia or Europe the safety tabs removed the 122 cannot 9 record on the tape This will ensure that you For general export units if it is necessary to 9 do not inadvertently erase previously re change the voltage setting of the 122 to 9 corded material match your area use the following procedures 0 ALWAYS DISCONNECT THE POWER LINE 1 BEFORE MAKING THESE CHANGES 2 1 Locate the voltage selector on the rear panel 3 of the 122 Mk II 4 safety tab 2 Using a regular slot blade screwdriver turn 7 safety tab the selector until the numerals corresponding 7 to the voltage requirements for your area 9 Before recording we recommend that you appear smooth out the tape pack by fast winding rewinding the cassette once gt 6 Always make sure the transport is STOP mode before attempting to open the cassette holder door Note for U K Customers Due to the variety of plugs being used in the U K this unit is sold without an AC plug Please request your dealer to install the correct plug to mach the mains power outlet where your unit will be used as per these instructions IMPORTANT The wires i
25. s t 0 5 96 12 96 0 04 NAB weighted 0 08 peak DIN IEC ANSI weighted 90 seconds for C 60 1 FG servo direct drive capstan motor 1 DC reel motor and 1 DC ancillary 3 heads erase playback and record 482 x 133 x 297 mm 19 x 5 1 4 x 11 11 16 7 7 kg 16 94 Ibs net 40 k ohms balanced 4 dBm 1 23 V 4 dBm 0 49 V 30 k ohms unbalanced 10 dBV 0 3 V 18 dBV 126 mV 10 ohms or more balanced 100 ohms 4 dBm 1 23 V 12 dBm 3 1 V 10 k ohms or more unbalanced 100 ohms 10 dBV 0 3 V 2 dBV 0 8 V 100 mW channel maximum at 8 ohms 100 kHz 3180 us 70 us Metal CrO 3180 us 120 us Normal 160 nWb m 0 VU Dolby reference 200 nWb m 3 VU 25 Hz 20 kHz 3 dB at 20 VU Metal 25 Hz 19 kHz 3 dB at 20 VU CrO 25 Hz 17 kHz 3 dB at 20 VU Normal 1 at 0 VU 400 Hz 160 nWb m Metal 59 dB NR OUT WTD 68 dB DOLBY B NR IN over 5 kHz 78 dB DOLBY C NR IN over 1 kHz Better than 45 dB at 1 kHz Better than 65 dB at 1 kHz reference 10 VU 120 V AC 60 Hz 220 V AC 50 Hz 240 V AC 50 Hz 100 120 220 240 V AC 50 60 Hz 24W In these specifications dBV is referenced to 1 0 Volt Actual voltage levels are also given in parenthesis To calculate the 0 dB 0 775 Volt reference level i e 0 dBm in 600 ohm circuit add 2 2 dB to the listed dB value 10 dB re 1 V 7 8 dB re 0 775 1 Specifications were determined using TEAC Test
26. s a long cable from the low impedance mic to remain balanced for rejection of hum and buzz The male XLR con nector on the end of the cable farthest from the mic is then connected to the 109B and the 109B s phone plug is connected to the 1 4 phone jack This approach is far superior to simply wiring a phone plug onto a 3 wire cable from the mic The 109B not only maintains the noise rejection of the balanced low impedance mic it also properly loads the mic to preserve correct frequency response lf you have an unbalanced input and a professional mic the 109B is the ideal transformer E 3 Head Demagnetizer e y The E 3 is essential for eliminating the residual magnetism that builds up on the heads as well as other metal parts along the tape path De magnetization is part of regular recorder main tenance and the TEAC E 3 is the right tool for the job E 2A Bulk Eraser The E 2A allows you to erase cassettes as well as 7 and 10 reels of tape quickly and complete ly It comes with a pilot light and integral circuit breaker to protect against overheating HC Head Cleaner amp RC Rubber Cleaner U S Only Using the right chemicals is important because strong solvents can dissolve the binder that holds the head laminations together Isopropyl alcohol can leave a residue and is not always adequate for cleaning desposits from modern tape formula tions Beware of rubbing alcohol while it is isopropyl it also contain
27. s oil and water that leave a heavy film on the heads TEAC HC head cleaner is formulated to clean tape heads tape guides and capstans without leaving a film or damaging head integrity Since pinch rollers are made of special rubber compound not metal a different solvent is needed for cleaning them Even a mild solvent like alcohol can cause drying and cracking of pinch rollers TEAC RC rubber cleaner con tains no alcohol Its special solvents wipe off tape oxide and other chemicals in RC actually rejuvenate the rubber This increases its re siliency and enhances its ability to pull tape without slippage HC and RC can be purchased with swabs in a tape recorder cleaning kit part amp TRC TZ 261 Cleaning Kit All Except U S TASCAM Cables Cable because of its inherent capacitance and resistance is an active component in an audio system There are vast differences in cable design and performance that have significant effect on the sound quality you ll get from your equipment TASCAM Professional Audio Cables are the best available Our cables feature very low capacitance under 15 picofarads foot so they don t act as low pass filters and roll off high frequencies The capaci tance is also consistent it doesn t change when the cable is bent or compressed You don t get noise or degraded results when the cable has been used a while Our cable s long term stability is provided by a special insulator that is as flexib
28. to initiate re cording by pressing the PLAY but ton alone If this one key method is used the OUTPUT select switch need not be set to INPUT for level adjust ments since engaging RECORD PAUSE by itself enables the input signal to be monitored Press the STOP button to release the record mode or press the PAUSE button to stop temporarily the process of recording To re sume recording from Record Pause mode press the PLAY button alone PLAYBACK T set the DOLBY NR system depending on the tape being used Set the OUTPUT control knob to a reason able position The nominal position is between 7 and 8 on the knob scale you are using the headphones adjust the PHONES volume control to a reasonable position If necessary press the ADJustment switch Making sure that the OUTPUT select switch is in the REPRO position start playback by presing the PLAY button Re adjust the OUTPUT control knob and or the PHONES volume as required Stop playback by pressing the STOP button or stop temporarily by pressing the PAUSE button If PAUSEd playback will restart by pressing the PLAY button ERASING A TAPE A previously recorded tape is automatically erased when new recording is made on it If an entire tape is required to be erased use the op tional Bulk Eraser TEAC E 2A not recommend able for use with metal tapes Another way to erase is to record with the INPUT level con trols turned fully c
29. tor signals during BIAS and or LEVEL adjustment VU Meters with PEAK LEDs These meters indicate the input signal level when the OUTPUT INPUT REPRO select switch is in the INPUT down position When the OUTPUT select switch is in the REPRO up position with the ADJ button in the off up position the meters will indicate the output levels of the reproduced signals which have been adjusted with the OUTPUT level control When the OUTPUT select switch is in the RE PRO up position with the ADJ button in the on down position they will indicate the levels of the reproduced signals regardless of the setting of the OUTPUT level control eee For the metering logic see item OUT PUT INPUT REPRO Select Switch The PEAK LED provided in each meter lights to warn you of overload at 8 dB input level which could result in distorted recording D INPUT L R Level Controls These controls adjust the level of signals from their respective channel s INPUT jack either on the front or the rear panel and are used for recording level adjustments The left and right controls are geared together to allow simulta neous adjustment of the record level to both channels This function is useful for fade in and out Each channel can be adjusted independent ly by holding one knob and turning the other OUTPUT Level Control This knob is used to adjust the signal level sent to the OUTPUT jacks on the rear panel Both channels are adj
30. usted together The OUTPUT level control does not affect the listening level in the headphones D OUTPUT INPUT REPRO Select Switch This switch selects the signals fed to the head phones PHONES jack and the OUTPUT jacks nected to the INPUT jacks front or rear Since in STOP the input can also be registered by the VU meters this position is useful for calibration or re cording level adjustments before you start the actual recording select the reproduce signal As play back or cueing starts the metering phones circuits will switch to the tape The OUTPUT circuits follow the same logic This position is the one used most and can be considered the normal posi tion Signals Sent to the PHONES and OUTPUT Jacks B Transport Mode RECORD RECORD SOURCE PUT Selector SOURCE SOURCE TAPE 9 INPUT REAR FRONT Select Switch Line souces can be plugged either into 1 4 phone jacks on front the RCA jacks on rear or XLR type jack on rear and this switch selects either front or rear inputs to feed the recording circuit REAR down position select the RCA or XLR type jacks on the rear panel select the 1 4 phone jacks on the front panel FRONT up position D NORMAL CrQ METAL Selector Three switches are provided to select the proper amount of bias current and to match the equal ization characteristics necessary for the type of tape being used S
31. which in turn causes more uneven wear This begins a vicious circle that cannot be stopped once it gets a good start The only solution to this will be to replace not only the heads but the tape guides as well Being conscientious about cleaning the tape path on your 112 will more than double the life of the heads and tape guides Capstan Shaft Playback Head Record Head Erase Head Pinch Roller Cleaning the Heads and Tape Guides All heads and metal parts in the tape path must be cleaned after every 6 hours of operation or before starting and after ending a recording session 1 Open the cassette door pull gently upwards 3 Using a good head cleaning fluid and a cotton swab clean the heads and tape guides until the swab comes off clean Wipe off any excess cleaning fluid with a dry swab Cleaning the Pinch Roller Clean the pinch roller at least once each day the deck is used Use a good rubber cleaner 1 Push up the transport protection lever as illustrated Press the PLAY button to engage the pinch roller and capstan shaft while holding the protection lever up 2 Lightly press a cotton swab moistened with rubber cleaner to the pinch roller on the right hand side of the capstan shaft This will prevent the swab from becoming en tangled Clean it until there is no visible residue on the pinch roller or coming off onto a clean swab 3 Using a clean cotton swab wipe off all excess rubber cleaner from the
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