manualshive.com logo in svg

Ampex AG-440 B, Operation And Maintenance Manual

Share
Download

Summary of Contents for AG-440 B

Page 1: ...www SteamPoweredRadio Com AG 440B AND AG 445B RECORDER AND REPRODUCER OPERATION ANO MAINTENANCE MANUAL 4B9D301 ...

Page 2: ...redRadio Com AMPEX r s _50D 82 se1s 4890301 03 A U 41 5 7 T BO 111 i spih i z 2 1 o fety StW u AG 440 B AG 445 B Recorder Reproducer Operation and Maintenance Manual ISSUED FEBRUARY 1969 CHANGED AUGUST 1971 A 001 I ...

Page 3: ...1 4A 1 8 71 6 22 1 70 4B 5 1 70 6 23 8 71 4B 8 1 70 6 24 1 70 4B 9 10 1 70 6 25 8 71 4C 1 8 71 6 26 1 70 4C 2 1 70 j6 27 8 71 4C 3 8 71 6 27A B 8 71 4C 4 8 71 6 28 1 70 4C 5 8 71 6 29 8 71 4C 11 1 70 6 30 8 71 4C 12 1 70 6 31 1 70 4E 2 8 71 6 32 8 71 4E 3 8 71 6 33 1 70 4E 4 8 71 6 34 8 71 4F 1 1 70 6 35 8 71 4F 2 1 70 6 36 8 71 6 37 8 71 Section f 6 38 8 71 9 pages 6 39 8 71 6 40 8 71 Section E 6...

Page 4: ...www SteamPoweredRadio Com 4890301 AG 440 Series Recorder Reproducer Frontispiece MPEX i ...

Page 5: ...ood City California 94063 USA SERVICE AND REPLACEMENT PARTS See note below For service and replacement parts contact your nearest Ampex field office If the installa tion of your system or accessory was supervised by an Ampex field engineer you will be sent information regarding the location of the nearest field office Alternatively write to the Technical Support Group at the address shown above ii...

Page 6: ...pex Corporation Audio Video Technical Publications Department 401 Broadway Redwood City California 94063 USA NOTE In order to be sure that you always receive information applicable to your equipment please include the following information when you write to us 1 System name 2 Model number including revision number 3 Serial number 4 Power requirements 5 System modifications and special accessories ...

Page 7: ... three principal degrees of burns recognizable as follows 1 A first degree burn reddens the skin 2 A second degree burn blisters the skin 3 A third degree burn chars the flesh and frequently places the victim in a state of shock accompanied by respiratory paralysis Respiratory paralysis in the victim can cause death within seconds by suffocation For this reason it is imperative that the approved m...

Page 8: ...s Signal Input Connections Signal Output Connections Restrapping Output Connecting Power Installing Accessories or Dummy Plugs Input Transformer or Microphone Preamplifier Remote Contr ol Unit Console Rear Covers Scrape Flutter Idler Checking Cables and Components Initial Lubrication OPERATING INSTRUCTIONS Operating Controls and Indicators Tape Transport Record Reproduce Electronic Unit Reproduce ...

Page 9: ...our Cleaning 4B l 4B l l Heads 4B l 4B l 2 Tape Guide Elements 4B l 4B l 3 Scrape Flutter Idler 4B l 4B 2 Eighth Hour Demagnetizing 4B l 4B 3 Lubricating 4B 2 4B 3 l General 4B 2 4B 3 2 Drive Motor Initial Lubrication 4B 2 4B 3 3 Motor Idler Three Month Lubrication 4B 2 4B 3 4 Idler Yearly Lubrication 4B 3 4B 4 Performance Checkoots 4B 3 4B 4 l General 4B 3 4B 4 2 Test Equipment 4B 3 4B 4 3 Test C...

Page 10: ...d Reproduce Heads Quarter Track Record Reproduce Heads Erase Heads Ad lsting Tape Wrap and Zenith Changing Head Stacks Record or Reproduce Stack Erase Head Stack Tape Skew Checkout PART E TRANSPORT MAINTENANCE General Servicing Units Brake Bands Solenoids Relays Capstan Idler Head Cable and Power Supply Boxes Replacement Head Cable Box Power Supply Removal Power Supply Installation Takeup and Rewi...

Page 11: ...ension Arm Replacement Capstan Idler Lubrication and Adjustment Parts Not Removable Idler Positioning Idler Replacement Capstan Solenoid Replacement Tape Lifter Adjustment Procedure Solenoid Replacement Tape Lifter Replacement Safety Switch Servicing Procedures General Control Box Bottom Cover Removal Control Box Removal Power Checks Relay Actuation Check Solenoid Actuation Check Drive Motor Check...

Page 12: ...rcuits Record Amplifier Circuit Reproduce Amplifier Circuit Sel Sync Circuit PARTS LISTS AND DRAWINGS See List of Illustrations Introduction MODIFICATION PROCEDURES PART A TAPE TRANSPORT MODE ALTERATIONS General Modification Procedures Modification to Enter any Other Mode Directly from the Record Mode Modification to Defeat all or any of the Edit Functions Modification to Enter the PLAY EDIT Mode ...

Page 13: ...ing 7C 3 3 Connecting 7C 4 Remote Operation 7C 4 l Recording 7C 4 2 Reproducing 7C 4 3 Fast Winding 7C 4 4 Edit Mode 7C 5 Ad lstments 7C 5 l General 7C 5 2 Sel Sync Level Adjustment 7C 5 3 Sel Sync Bias Trap Adjustment X AMPEX 7C l 7C l 7C 1 7C 1 7C 2 7C 2 7C 2 7C 2 7C 2 7C 2 7C 3 7C 4 7C 4 7C 4 7C 4 7C 4 7C 4 Registered Ampex Corporation JAN 1970 ...

Page 14: ...s 3 3 3 2 Tape Threading Path 3 3 4A 1 Head Assembly Overlay Removed 4A 2 4A 2 Head Cable Box 4A 2 4A 3 Scrape Flutter Idlers Installed 4A 3 4A 4 Record Reproduce Unit Supports 4A 4 4B 1 Noise Filter Schematic 4B 6 4B 2 ASA A Curve Filter Schematic 4B 6 4C 1 Tape Tension Adjustments 4C 2 4C 2 Brake Adjustments 4C 3 4C 3 Capstan Idler Adjustment 4C 4 4C 4 Capstan Idler Force Measurement 4C 5 4C 5 P...

Page 15: ... Assembly Rear Tape Transport Adjustments Tape Lifter Assembly Takeup Assembly Rewind Assembly Brake Assembly Reel Idler Assembly Drive Motor Assembly Control Box Assembly Top Control Box Assembly Inner Printed Wiring Assembly Record Tape Lift Delay Tape Transport Schematic Transport Power Supply Diagram Power Supply Schematic Record Reproduce Power Supply Schematic Reproduce only Electronics Sche...

Page 16: ...0 LIST OF ILLUSTRATIONS Continued TITLE Capacitor Mounting Bracket Electronics Optional Remote Control Optional Microphone Preamplifier Response Curves Sheet 1 Response Curves Sheet 2 Cable Electronics Cable Power AMPEX 4890301 Page 6 39 6 40 6 41 6 42 6 43 6 44 6 45 xiii xiv ...

Page 17: ... Level Setting 4B 5 4B 2 Reproduce Signal Noise from Peak Record Level 4B 8 4B 3 Rotational Rates 4B 9 4C 1 Tension Adjustments 4C 3 4C 2 Main Brake Force 4C 3 4C 3 Capstan Idler Force 4C 6 4C 4 Standard Alignment Tapes 4C 7 4C 5 Reproduce Equalization Level 4C 9 4C 6 Record Equalization Level 4C 12 JAN 1970 AMPEX xv xvi ...

Page 18: ...www SteamPoweredRadio Com SECTION I DESCRIPTION z 0 t a w 0 ...

Page 19: ... frontispiece mounted in portable cases or un mounted for vertical or horizontal installation in TM Ampex Corp 4890301 01 SlctiOI 1 DESCRIPTION a rack or custom console The basic system consists of a tape transport a head assembly and one record reproduce electronic unit for each channel Each record reproduce unit con tains a built in Sel Sync circuit for recording added channels in perfect synchr...

Page 20: ...board modules Front panel controls are RECORD and REPRODUCE LEVEL RECORD SELECTOR and OUTPUT SELECTOR Pilot lamps light to indic ate that the associated channel is ready to record or is recording A large VU meter monitors levels of the record reproduce and bias plug in modules The modules removable tbroogh a front panel cutout are guided to printed circuit board receptacles when inserted in the ch...

Page 21: ...www SteamPoweredRadio Com 4890301 01 1 o1 Fig 1 1 Tape Transport tfCO tcto Fig 1 2 Record Reproduce Unit Fig 1 3 Printed Circuit Boards Fig 1 4 Heproctuce Electronic Module AMPEX 1 3 ...

Page 22: ...e or four channel recorder using 1 2 inch tape to a one or two channel recorder using 1 4 inch tape Since the AG 445 reproducers contain only reproduce heads a post is substituted in the erase head position to maintain correct tape a lignment One or two track heads are available for 1 4 inch tape The two track assembly has the normal two track head and a 1 4 track head with a switch for selecting ...

Page 23: ...ng Portable Case for two electronic units for 3 4 electronic units Blank Panel for unused case spaces Support Electronic Unit used in pairs Reel 10 1 2 1 4 Tape identical to reel supplied Reel 10 1 2 1 2 Tape Supplied with all required installation hardware AMPEX 4890301 01 Ampex Part No 4010066 4010080 4580200 02 4040982 4040984 4010076 01 contains 4040982 and 4040984 4010076 02 contains 4040982 ...

Page 24: ... 600 ohms balanced or unbalanced with nominal output levels of 4 dBm or 8 dBm Automatically switched by transport speed selector All Solid state Plug in printed circuit boards for record reproduce and bias amplifiers Built in Sel Sync selective synchronization circuit Power supply and bias oscillator for AG 440B power supply only for AG445B on separate plug in printed circuit board in tape transpo...

Page 25: ... override on remote control Second harmonic distortion of a 500 Hz signal recorded at peak level is less than 0 2 Measuring all wavelengths from O 5 Hz to 200 Hz according to ASA Z57 1 1954 At 15 ips Maximum 0 08 rms 7 1 2 ips Maximum 0 1 rms 3 3 4 ips Maximum 0 15 rms Attains speed in O 1 second stable tape motion within 3 5 seconds motion within Flutter and Wow specification Specifications are b...

Page 26: ...or Reproduce Input and Bias positions Toggle switches Power Tape Speed and Reel 2 Mode Control Pushbuttons Play Fast Forward Rewind Record Stop and Edit Edit modes available are Stop Edit Play Edit and Fastwinding Edit All modes except Stop Edit and Play Edit can be remotely controlled 105 125 vac 60 Hz 50 Hz system available Systems 1 channel 2 channel 3 channel 4 channel AMPEX Amps Approx 2 3 2 ...

Page 27: ...www SteamPoweredRadio Com SECTION II INSTALLATION z 0 j Iii z ...

Page 28: ...tape trans port 4890301 01 Sectiu 2 INSTALLATION Remove all materials adhesive tape rubber bands etc used to secure tape handling and other moving components during shipment 2 1 2 Console Mounted Equipment Equipment ordered with the console is shipped mounted in the console with interconnec tions completed The console is shipped lying on its back with the tape transport rotated 90 to the horizonta...

Page 29: ...nsole is interconnected at the factory however always insure that cable connectors are firmly seated and cables are un damaged Portable equipment connections must be made each time the recorder is set up in the field Always route power and control cables as far as possible from the input output cables and the head cables to avoid electricai interference Open the rear covers for access and then mak...

Page 30: ... 2 00 L l PACE REQUIRED BEHIND MOUNTING INCLUDING CONNECTORS TRANSPORT 10 50 INCHU ELECTRONICS 9 50 INCHES Fig 2 1 Mounting Dimensions UPT1t11CIIWS Fig 2 2 Front Panel Mounting Details Fig 2 3 Tape Transport Connector Panel Fig 2 4 Record Reproduce Unit Rear AMPEX 2 3 ...

Page 31: ...The output is adjusted to the de sired level by means of the LEVEL control 2 6 CONNECTING POWER Connect the power cable from AC POWER receptacle J601S on the tape transport control box to the power source 2 7 INSTALLING ACCESSORIES OR DUMMY PLUGS See Figure 2 4 2 7 1 Input Transformer or Microphone Preamplifier The equipment is shipped with a dummy plug Catalog No 4030034 30 in the INPUT ACCESS re...

Page 32: ...ly box on the tape transport to J606S on the tape transport control box e The record reproduce unit plug in printed circuit boards Especially check that the bias amplifier board the record board and the reproduce board are firmly in position f Reproduce modules mounted in tray behind a solid front cover secured by captive thumbscrews Especially check printed circuit board in each module g Equalize...

Page 33: ...etscrew side in d Align setscrew to the flat and place flywheel on shaft End play must be 0 003 0 005 inch to avoid damaging the ball bearings e Check the end play by firmly holding the pulley down in the housing and checking with a feeler gauge between the pulley and the housing at the side opposite the arm f To this measurement add 0 004 inch and select feeler gauge leaves equal to the total g I...

Page 34: ...www SteamPoweredRadio Com SECTION Ill OPERATING INSTRUCTIONS r IJ z 0 j a ti z z a w ...

Page 35: ...ied Selects slow v or fast W speed Equalization is automatically switched in accordance with speed selection Used to select correct tension for large 0 or small o reel hubs One switch for each turntable Sets the equipment in the record mode Tape motion must first be started by pushing the PLAY µ ishbutton with the RECORD SELECTOR at READY Changes equipment to stop edit or play edit mode from respe...

Page 36: ...dule LEVEL screwdriver control rM Ampex Corp 3 2 Used to adjust reproduce level VU meter indicates reproduce record or bias level as selected at the OUTPUT SELECTOR switch Meter lights when power is applied Selects one of three conditions SAFE Channel cannot be placed in the recor d_mode READY Channel ca n be placed in the record mode SEL SYNC Channel will operate in the Sel Sync condition refer t...

Page 37: ...www SteamPoweredRadio Com 4890301 01 0 v AM ID PQWER SPEED REEL PLAY REWIND FAST FWD STOP EDIT Tape Transport Record Reproduce Unit Fig 3 1 Controls and Indicators AMPEX 3 3 ...

Page 38: ...all tape slack and hold the takeup tension arm oot of contact with the safety switch 3 2 5 Monitoring Facilities For audio monitoring plug headsets or an amplifier speaker into the record reproduce unit PHONES jack on the front panels 3 3 RECORDING 3 3 1 Without Sel Sync Step 1 Switch POWER to ON Step 2 Thread blank tape on transport then close head gate NOTE Always bulk erase any tape that was re...

Page 39: ...ape on trans port then close head gate On two channel equip ment with the normal two track head and a 1 4 track head push the switching knob down to select the two track head or up to select the 1 4 track head 4890301 01 Step 4 Select tape speed correspond ing to speed at which tape was recorded Set REEL toggle switch on each turntable for the size of the reel hubs in use Step 5 Set OUTPUT SELECTO...

Page 40: ...www SteamPoweredRadio Com SECTION IV MAINTENANCE w 0 z z w 1 z ...

Page 41: ...econd tape scrape flutter idler and the console rear covers adding more channels and convert ing from a reproducer to a recorder reproducer 4890301 01 Section 4 MAINTENANCE FOREWORD Part B PREVENTIVE MAINTENANCE including cleaning demagnetizing lubricating and overall performance checkout Part C ADJUSTMENT ALIGNMENT contains normal mechanical electronic adjust ment and adjustment procedures to cor...

Page 42: ... far as possible from the cent er of the transport 4890301 Section 4 MAINTENANCE Part A Conversion Step 3 Check that reel guard flats are parallel to transport top edge and that turntables are centered in the guards then tighten the nuts 4A 2 TAPE WIDTH CONVERSION 4A 2 1 General Changing between 1 2 inch and 1 4 inch magnetic tape is easily accomplished on the tape transport by rotating the two ta...

Page 43: ...nversion to handle 1 4 inch tape using the four stack head or re conversion to handle 1 2 inch tape To remove the head cable box for inspection head removal is unnecessary just remove the head overlay and disconnect the heads from the recept acles Change the head cable box as follows Step 1 Remove the head assembly per paragraph 4A 2 3 Step 2 Disconnect all head cables from receptacles Step 3 Manu...

Page 44: ...duce unit in position next to the installed units Mounting di mensions are shown in Fig 2 1 2 The two portable cases for the re cord reproduce units are a two unit case Cata log No 4150330 and a four unit case Catalog No 4150331 Two two unit cases may be used for three or four channel portable systems and stacked on top of each other during use For one channel or three channel equipment a blank pa...

Page 45: ...n the tray and secure it with three No 6 self tapping screws inserted up through the bottom of the tray Step 4 Mate the equalizer connector to the receptacle at the front of the reproduce board Step 5 Slide the reproduce board into the chassis on the guides until it mates with its receptacle Step 6 Connect the reproduce module to the tape transport according to paragraphs 2 4 through 2 7 4A 5 CONS...

Page 46: ...astic fin ishes and the capstan idler tire Do not use metal tools which might scratch the heads 4890301 01 Section 4 MAINTENANCE Part B Preventive Maintenance 4B 1 2Tape Guide Elements Use iso propyl alcohol to clean all tape guiding elements the capstan and the capstan idler CAUTION Do not use head cleaning solution on these components it will dam age the idler rubber tire and cause tape slippage...

Page 47: ...n paragraph 4B 3 4 4B 3 2 Drive Motor Initial Lubrication When the equipment is first received or a replacement motor is installed the motor bearing might have dried out even with oil in the reservoir Running the motor may result in bearing damage before the oil reaches it so lubrication before operation is required as follows Step 1 Use a knife blade or similar tool to gently pry the cone shaped ...

Page 48: ...jewel er s rouge or equal After polishing re clean the roller ultrasonically Step 6 Lubricate each jewel bearing with one drop of jewel oil or Ampex precision instrument oil No 087 239 applied with a No 21 gauge hypodermic needle 4890301 01 4 B 3 4 2 Reassembly Assemble the idlers with great care as follows Step 1 Align the scribe marks with the centerline of the setscrews as shown in Fig 6 7 Step...

Page 49: ... a standard tape per paragraph 4C 3 7 steps 2 through 9 keeping in mind the low frequency limitations given for this tape 4B 4 4 2 AG 440B Checkout The following procedure gives a pre cise indication of overall frequency response using external meters an alternate checkout accurate within approximately 1 dB using the equipment VU meters is described in paragraph 4B 4 4 3 Step 1 Apply power and thr...

Page 50: ...8 Bias level adjust per para graph 4C 3 7 Reproduce equalization ad just per paragraphs 4C 3 7 and 4C 3 9 f g h Record calibration adjust per paragraph 4C 3 7 Record equalization adjust per paragraph 4C 3 10 Tape tensions adjust per paragraph 4C 2 3 4B 4 4 3 Frequency Response Check A check of frequency response ac curate to approximately 1 1 dB can be made using an Ampex Standard Alignment Test T...

Page 51: ...ally from a peak record level at 6 dB above normal operating level There fore on equipment strapped for a 8 dBm opera ting level the vtvm noise indication must be in creased in magnitude by 14 dB i e a vtvm read ing at 46 becomes 60 dB On equipment strapped for a 4 dBm operating level output the vtvm indication must be increased in magnitude by 10 dBm When an A weighted curve noise measurement is ...

Page 52: ...istortion are affected by tape noise and modulation noise Also to avoid error use a signal generator with less than 0 1 distortion To check distortion record a 500 Hz signal on blank tape at normal operating level then reproduce the signal The second harmonic content should not exceed O 2 and the third should be 0 6 to 1 1 Check reproducer distortion with a tape recorded on a U lit that is correct...

Page 53: ...ns should be followed Check tape flutter as follows on any correctly aligned reproduce channel Step 1 Set RECORD SELECTOR on all record reproduce units to SAFE to avoid accidentally entering the record mode whichwill erase the flutter test tape Step 2 Connect reproduce channel OUTPUT connector to the flutter meter EXT SIGNAL SIGNAL INPUT connector Step 3 On the flutter meter set FLUTTER WEIGHTING ...

Page 54: ...r tire bearing defective or needs lubrication pressure incorrectly adjusted e Reel idler bent shaft flywheel not balanced damaged bearing f Head assembly poor tape guiding g Tape scrape warped or damaged reels 4B 4 7 2 Flutter Troubleshooting Aids As an aid in troubleshooting a sound and vibration analyzer such as General Radio Type 1564 can be used to isolate flutter to certain frequencies by con...

Page 55: ...Sectio n MAINTENANCE Part C Adjustment and Ali1nment 4 Technician tools 4C 2 2 Different Tape Sizes Tape transports for one or two channel equipment are adjusted at the factory for use with 1 4 inch tape Transports for three or four channel equipment are adjusted for use witheither 1 4 inch or 1 2 inch tape so the quick conversion feature can be used If only one tape width is to be used make adjus...

Page 56: ...or 8 to 9 oz e Press STOP Press the PLAY button and adjust R605 for the scale reading given in Table 4C l in the PLAY TENSION col umn for the tape width used Switch the REEL HUB switches to the LARGE REEL HUB position and check for the scale r eading given in Table 4C l in the PLAY TENSION column for the tape width used It may be necessary to switch be tween LARGE REEL HUB position and SMALL REEL ...

Page 57: ...d maintains tape tension An edit brake system partially releases the brake bands to reduce braking force Wilen the stop edit mode is selected Torrington clutches on both brake drums eliminate CW braking of the supply reel and CCW braking of the takeup reel Braking is applied only to the reel supplying the tape at the time STOP mode is initiated Required adjustment are made with the nuts shown in F...

Page 58: ...BRAKE ADJUST MAIN BRAKE ADJUST Fig 4C 2 Brake Adjustments Fig 4C 3 Capstan Idler Adjustment 1 Dl 1 AT INSTANT IT LOVES CArSTAN 90 LOOP Of TWINE UOUNO SHAFT I I t 1 I c ____ _ sHm Fig 4C 4 Capstan Idler Force Measurement Fig 4C 5 Power Supply Box Interior 4C 4 AMPEX AUG 1971 ...

Page 59: ...solenoid temperature rises its resistance also rises When power line regula tion is poor allow 30 minutes or more for warm up operating in the reproduce mode before ad justing the capstan idler force At the factory the solenoid is checked to be sure it will bottom at line voltages of 90 volts cold and 105 volts hot Step 1 Apply power to equipment Use pressure sensitive tape or a rubber band to hol...

Page 60: ...emove test tapes from equipment only after a normal play run never after a fast winding mode 4C 3 1 1 Tape Degradation After extensive use high frequency tones may drop as much as 2 dB and flutter in dications may rise even though actual flutter re mains unchanged Flutter increase is caused by demagnetization of the recorded signal from re peated runs tape deformation due to tape tension changes i...

Page 61: ...pin 5 of any of the four receptacles J701 through J704 on the power supply box With the equipment operating in the reproduce mode the voltmeter shoold indicate 39 1 2 1 volts If adjustment is necessary open the cover on the power supply box see Fig 4C 5 WARNING Full line voltage is present in the box Do not touch the fuse post or transformer leads while the system is energized With the voltmeter c...

Page 62: ...e REPRODUCE LEVEL control to the full clockwise position Step 8 The second tone on the test tape is the azimuth adjustment tone As this tone reproduces adjust the reproduce head azi muth adjustment nut not the screw for a maxi mum output indication on the VU met era or vtvm On multi channel equipment if all heads do not peak at the same setting adjust for optimum output of all the heads NOTE If th...

Page 63: ...ging effect produces invalid response at frequencies below 700 Hz 15 and 7 1 2 ips or 500 Hz 3 3 4 ips This effect which results in high indications in the lower frequen cies does not occur when tapes are recorded and reproduced 111111 l tllll HII IIPIHICI l tllll l tll 4890301 01 Fig 4C 6 Head Azimuth Adjustments with heads mounted in the same configuration Step 9 For tests at 7 1 2 or 3 3 4 ips ...

Page 64: ... Record Head Azimuth See Figure 4C 6 This adjustment similar to the repro duce head azimuth adjustment is made while si multaneously recording and reproducing The record head azimuth is adjusted to coincide with the reproduce head previously adjusted to a re ference position This procedure doesn t apply to a reproducer CAUTION Do not adjust any head assembly nut or screw except the nut for a zi mu...

Page 65: ...minal 1 volt rms level Step 3 Apply power to equipment Set tape speed and set REEL switches for the reel hub sizes ment 4890301 Step 4 Thread blank tape on equip Step5 SetOUTPUTSELECTOR switch to INPUT and adjust the RECORD LEVEL control as necessary for a normal record level 8 dBm or 4 dBm depending on equipment out put strapping as indicated on the vtvm Step 6 Set OUTPUT SELECTOR switch to REPRO...

Page 66: ...e proced ure for each additional channel 4C 4 SEL SYNC ADJUSTMENTS Both adjustments require access to the record reproduce unit back panels Sel Sync ad justments are not applicable to the reproducer 4C 4 1 Test Equipment Obtain the following equipment 1 Ampex Standard Alignment Tape see Table 4C 4 2 Technician s tools 4C 4 2 Test Conditions Check for the following test conditions 1 LINE TERMINATIO...

Page 67: ...reel 4C 4 4 Sel Sync Bias Trap Adjustment When operating with Sel Sync the bias from one recording channel could leak into another Nothing would be recorded on the latter channel but VU meter monitoring could be mask ed so a trap is provided to minimize the leakage The bias trap adjusted at the factory usually requires no readjustment If the bias from recording channels affects VU meter indic atio...

Page 68: ... Step 2 Thread tape on transport and initiate the play mode at the highest speed available Section 4 MAINTENANCE Part D Head Maintenance Step 3 Loosen two nuts items 42 and 43 Fig 6 1 approximately 1 4 turn Step 4 Turn the two hex socket set screws see Fig 4D 1 clockwise the same nwn ber of turns until the head laminations barely appear at the tape bottom edge Step 5 Carefully count the turns whil...

Page 69: ...d bottom this checks bead zenith If tape wrap adjustment is indicated remove the head housing cover by disengagingthe captive screw on the angled back surface Loosen the large cross head screw item 40 Fig 6 1 or 31 Fig 6 3 Beneath the mounting screw there is a smaller cross head screw in a hole Loosen the small cross head screw and care fully use a screwdriver to pry at the side of the head stack ...

Page 70: ...ews in the head stack holes and tighten them firmly Step 10 Secure the head stack and shield in the head assembly with the large cross head screw removed in Step 2 Check through 4890301 01 the bottom of the casting that the head stack shield is aligned with the head shield and is parallel to the casting top front edge then tighten the mounting screw Step 11 Turn in the two hex socket bead setscrew...

Page 71: ... 37 Fig 6 1 or item 29 Fig 6 2 so they will maintain the guide position but can be moved Step 2 Adjust the tape guide very slightly up or down then repeat the tape skew check If the high frequency drop is still not within tolerance move the tape guide in minute increments until tape skew is corrected Tighten the guide mounting screws then adjust head azi muths per paragraphs 4C 3 6 and 4C 3 8 llCI...

Page 72: ...per 4 O grit orfiner Do nQ t use emery cloth or carborundum coated paper 4890301 01 Section 4 MAINTENANCE Part E Transport Maintenance 4E 2 2 Solenoids A corroded solenoid plunger which doesn t slide freely can be renovated by rotating it in a drill press while holding crocus cloth against it CAUTION Do not lubricate plungers since oil can eventually cause sticking 4E 2 3 Relays To visually check ...

Page 73: ... of the turn table also prevents removal of the motor flange If any of these three components are damaged beyond use the complete motor assembly must be replaced The takeup and rewind assembly draw ings are shown in Figs 6 12 and 6 13 Adjustment of tape tension motor tor ques and braking force are given in paragraphs 4C 2 3 and 4C 2 4 4E 4 2 Replacing Takeup or Rewind Assembly The takeup and rewin...

Page 74: ...A band link clamp will also be released 4890301 Step 3 Loosen do not remove the two socket head cap screws at the other end of the brake band Take care not to lose the leaf spring then slide the brake band end from between the clamp and the screws and remove the brake band Step 4 Insert the new brake band through the holes in the housing with the slotted end toward the solenoids Step 5 Secure the ...

Page 75: ...he plunger protru sion from the solenoid in its bottomed position Step 4 Check that the brake band is correctly aligned to the drum Slide the slotted end of the band see Fig 6 10 into its clamp until the main brake solenoid plunger is 5 32 to 3 16 inch from the fully bottomed position meas ured in Step 3 solenoid not actuated Secure the band in that position by tightening the two socket head capsc...

Page 76: ... idler so that the top of the rubber tire is 1 32 1 64 inch below the capstan shaft end 4E 5 4 Motor Capacitor Replacement See Figure 6 9 and 6 10 The drive motor capacitor item 13 Fig 6 9 is secured by two screws to the capstan sole noid mounting plate item 43 Fig 6 9 Slide the plastic sleeving from the solderless connectors on the capacitor leads and disconnect the wires Use a short screwdriver ...

Page 77: ... be ordered separately Contact Ampex Audio Technical Support Department if replacement is required The tension spring can easily be replaced by unhooking it from two pins one on the arm and the other on the mount To install the arm assembly insert it in the housing with the arm in the upper left slot Install the two screws loosely then check and adjust arm tension per paragraph 4E 6 3 Re place the...

Page 78: ...the transport back Remove the connectors for drive and takeup motors from the transport con 4890301 01 trol box Hold other wires aside so the safety switch item 23 Fig 6 9 is accessible Use long nose pliers to bend the safety switch spring actuator out from the switch to actuate with the takeup tension arm higher and toward the switch for a lower position Reconnect the drive motor and takeup motor...

Page 79: ...item 9 Fig 6 9 Slide the stop to the position that provides cor rect clearance then tighten the screws Check and adjust the capstan idler pressure per para graph 4C 2 5 4E 8 4 Idler Replacement See Figure 6 8 The rubber tired idler item 4 5 Fig 6 8 is held on the idler arm item 39 Fig 6 8 by a setscrew item 75 Fig 6 8 To remove the idler loosen the setscrew and slide the idler shaft from the arm I...

Page 80: ...ve tape lifter spring hook to the next hole in the bracket Then repeat step 3 4890301 01 Step 5 Manually move solenoid plunger to fully bottomed position Tape lifter arm should move to 1 16 inch from other end of slot Step 6 ll clearance is not 1 16 inch reposition the tape lifter solenoid stop from the 21 32 inch clearance set in step 1 move stop far ther from solenoid face for more arm travel or...

Page 81: ... the transport casting by two screws and wash ers items 70 and 82 Fig 6 9 Remove these screws and the switch along with the shield item 30 Fig 6 7 To install the safety switch place the shield over the switch then use the removed two screws and washers to secure them to the cast ing Connect the leads to the switch as shown in Fig 6 10 Check and adjust safety switch actuation per paragraph 4E 7 2 C...

Page 82: ...cedures Check for correct connect ion of leads to the solenoids drive motor capac 4890301 01 itor and safety switch as shown on Fig 6 10 4E 11 4 Power Checks 4E 11 4 1 General In the following procedures it is as sumed that a sound power cord is correctly in stalled between the transport and the required power source 4E 11 4 2 Input Power Check Set power switch to ON the power lamp should light If...

Page 83: ...lay if the relay doesn t actuate proceed as follows Step 1 Turn power OFF and remove the relay Use an ohmmeter to check across the relay coil relay pins 13 and 14 for approximately 650 ohms resistance If the coil is open or shorted replace the relay If a replacement is not immed iately available the relays may be interchanged for emergency play record operations Step 2 If the coil seems sound in s...

Page 84: ...ward mode then the rewind mode resistance should be zero or low 3 Check from the neg ative A lead to the negative side of C609 without actuating the relays 4890301 01 d If the tape lift er solenoid actuates in only one fast winding mode but both modes otherwise operate normally it indicates incor rect making of the relay contacts in the failed mode or poor wiring connections to the relay contacts ...

Page 85: ... rewind relay and then the fast forward relay resistance should be zero or low when each relay is actuated Check from the positive lead to the positive side of C614 without actuating any relay resistance should be zero or low c If the takeup main brake solenoid actuates in the play mode but the rewind main brake solenoid doesn t turn power OFF then disconnect the rewind motor cable from the con tr...

Page 86: ...ty switch is operating correctly If not 1 adjust the safety switch actuation per paragraph 4E 7 2 and or 2 adjust the spring force of the takeup arm per para graph 4E 7 1 and or 3 replace the safety switch per paragraph 4E 10 4890301 01 b Disconnect the drive motor cable from the control box Set the speed switch to HIGH turn power ON and check voltage with an ac vtvm across receptacle pins 4 and 5...

Page 87: ...actuation of the main brake solenoid If it fails to actuate check it per paragraph 4E 11 6 4 If it actuates disconnect the takeup motor cable from the con trol box Remove any tape threaded on the equip ment and hold the takeup tension arm away from the safety switch Press the fast forward push button and use an ac vtvm to check voltage a cross motor receptacle pins 1 and 2 full line power should b...

Page 88: ...abling connections are shown on Fig 6 13 4E 11 10 Power Lamp Replacement To r eplace the power lamp remove the two screws item 61 Fig 6 8 securing the escutcheon over the pushbuttons and remove the released parts Remove the two screws items 61 and 65 Fig 6 8 securing the escutcheon over the toggle switches and remove the released parts Remove the lamp from the socket with a lamp extracting tool if...

Page 89: ...en install ed between a circuit board and its receptacle moves the circuit board outside the chassis so all 4890301 01 Section 4 MAINTENANCE Part F Electronic Corrective Maintenance components are accessible for testing adjustment the extended circuit boards must be mechanically supported Extender board catalog numbers are as follows reproduce 4020151 record 4020152 bias amplifier 4020153 and powe...

Page 90: ...4F 4 RECORD RELAY CHECK The record relay the only one used in a record reproduce unit is identical to the four relays on the tape transport a If the record relay is suspected to be inoperative remove the dust cover from the relay Hold the takeup tension arm away from the safety sWitch set the record selector to READY and initiate the play mode Press and release the record pushbutton if the relay a...

Page 91: ...ts two channels 66 volts three channels 60 volts and 4890301 01 four channels 54 volts d U voltage is absent or is excess ively low turn power OFF and use an ohmmeter to check CR706 CR705 and R707 on the power supply board U component values are correct remove the transport power supply box per para graph 4E 3 On the box mounting side check capacitor C707 resistor R706 and the diodes CR701 through...

Page 92: ... that the dummy plug or accessory is in the input accessory sock et on the record reproduce unit back panel To check the bias voltage initiate the record mode and set the output selector to BIAS if the bias voltage is not normal check it per paragraph 4F 6 Check the record relay per paragraph 4F 4 4F 7 2 1 Servicing Hints Servicing hints which should prove helpful follow a Signal voltages and de v...

Page 93: ...t in the mounting holes Insert the leads through the holes then bend them flat against the foil path Use the soldering pencil and low melting point rosin core solder to solder the joints Do not overheat the junction or nearby junctions Remove excess rosin from the jointwith a clean lint free clothmoistened with alcohol 4890301 01 Alter replacing a diode or transistor allow the board to cool approx...

Page 94: ...redRadio Com 4890301 01 4F 6 MICIIATOII HC0 1D O C 1 1 CON NI CTOI Fig 4F 1 Record Response Check Setup N MIIIA 10I ftfH OOUCI MUii co flllCTOtt I INC TllltltlNATION TCM Fig 4F 2 Reproduce Response Check Setup AMPEX ...

Page 95: ...www SteamPoweredRadio Com SECTION V THEORY OF OPERATION z 0 i a w u 0 a 0 w c ...

Page 96: ...ise and the takeup turntable counterclockwise 4890301 01 Slct111 5 THEORY O F OPERATION In the play or record modes of opera tion the capstan controls tape speed it p ills tape from the supply reel whose opposing torque helps to maintain tape tension and delivers it to the takeup reel which also helps maintain correct tape tension The motor torque and therefore tape tension is adjustable at resist...

Page 97: ...r is ON and a tape is correctly threaded When the recorder reproducer is in the play or record mode solenoid K610 ener gizes and moves the capstan idler to clamp the tape against the rotating capstan The mainbrake solenoids K605 and K607 energize to release the brakes The capstan then drives the tape across the head assembly at the selected speed 5 1 4 Reel Idler A reel idler assembly on the trans...

Page 98: ... assumes that the tape coasts about 250 milliseconds before stopping This allows the tape biasing rf current to completely decay before tape motion ends which avoids the loud noise that results from the tape 4890301 01 stopping while bias current is still present in the record head The delay circuit for the tape return to head function involves terminals E7 throogh E13 and Q606 on the small circui...

Page 99: ...ape lifter action in the rewind mode as in the fast forward mode can be de feated by pressing the EDIT pushbutton 5 1 7 4 Edit Modes The negative return for the edit rewind and fast forward relays is through trans istor Q601 which must conduct to allow those modes to actuate refer to record mode para graph 5 1 7 5 When the edit relay is energized in either the stop edit or the play edit mode con t...

Page 100: ...0 WYO SP O fltOM SPC O swm 39 voe LOW SKEO SfL SYNC TltAP 1PUSH l UI L I IIAS lfl lt LI bw l AMPLll l lt _ _________________ IIAS CAL IICPIIOOUCC N A D AWUf l lt e OIi TIME Dl L t t ST 104 AMPUrElt I0Z Clllll lt lra Lowu IOS I I I _L I I I I awur u lfl lt IOG vu MU lt I R I I I _J __ j_ _J PU11 PUS OUTPUT AM l i llt 107 1 IOIM l tOhl L IN TEIIM ltCPIIOOUCC 04 IMOll 7 Fig 5 2 Block Diagram 11 UT OU...

Page 101: ... Hz This and the addit1011al drop in volume practically nullifies tape scrape flutter 5 2 5 2 1 ELECTRONIC cmcUITS See Figure 5 2 Power Supply Components for the regulated power supply in a recorder reproducer are mounted on the same printed circuit board as those for the bias oscillator see Fig 6 22 For the repro ducer the bias oscillator is omitted see Fig 6 23 In either case the printed circuit...

Page 102: ...ch and then to the VU meter A contact set on the out put selector sWit ch shorts the bias calibrate 4890301 01 resistor 3R44 except when the sWitch is at BIAS this removes the rf signal from the line to re duce rf induction into other circuits during the record or reproduce modes 5 2 3 Record Amplifier Circuit A schematic diagram of the record amplifier circuit is given in Fig 6 24 The re cord amp...

Page 103: ...r record reproduce units and reproduce modules is essen tially the same except that no VU meter is supplied with the latter Refer to schematic dia grams 6 24 recorder reproducer and 6 25 re producer A monitor jack for reproducers is mounted on the back panel of the module From the reproduce head the re produced signal goes throogh the record selector switch to the reproduce circuit board and trans...

Page 104: ...rough a strapping circuit for a 8 dBm or a 4 dBm nor mal operating level see Fig 5 3 Equipment strapped for a 8 dBm output has resistors 8R34 and 8R35 connected as a voltage divider across the transformer with 8R36 connected to their junction for the VU meter input Strapping for 4 dBm has resistors 8R34 and 8R35 connected in parallel on one side of the line and series resistor 8R36 in the input ci...

Page 105: ...www SteamPoweredRadio Com SECTION VI PARTS LISTS AND DRAWINGS ...

Page 106: ...890301 PARTS LISTS AND DRAWINGS c Transport d Transport Control e Electronics f Accessories and Miscellaneous A numerical index of main components is given below TITLE Mic Preamplifier Remote Control Transport 1 inch Recorder Reproducer 1 channel Recorder Reproducer 2 channel Recorder Reproducer 4 channel Reproducer 1 channel Reproducer 2 channel Reproducer 4 channel Reproduce Module Electronics R...

Page 107: ...ower Supply Aesy 4020274 03 2 2 2 2 Knob Assy editing 4030145 10 2 2 2 2 2 2 2 2 Knob Assy reel 4040492 10 1 1 1 1 Panel Assy backing 4040945 01 1 1 l 1 1 1 1 l 1 l 1 1 Idler Assy scrape nutter 4040955 01 1 1 1 1 1 1 1 1 1 1 1 1 Cable Aesy power 4050416 02 1 1 1 1 1 1 1 1 1 1 1 1 Cable Assy electronics Interconnect 4050442 01 1 1 1 1 1 1 1 1 1 1 1 1 Mounting Box Assy head cable 4050447 06 2 2 2 2 ...

Page 108: ...20272 02 l l l 1 1 1 l 1 1 1 l l Power Supply Assy 4020274 03 2 2 2 2 Knob Assy editing 4030145 10 2 2 2 2 2 2 2 2 Kno Assy reel 4040492 10 1 1 1 1 Panel Assy backing 4040945 01 1 1 1 1 1 1 1 1 1 1 1 1 Idler Assy scrape flutter 4040955 01 1 1 1 1 1 1 1 1 l 1 l 1 Cable Assy power 4050416 2 1 1 1 1 l 1 1 l l l 1 l Cable Assy electronics interconnect 4050442 0l l 1 1 1 1 1 1 l l 1 1 l Mounting Box As...

Page 109: ...l l 1 l 1 l Head Assembly Two Track 4020272 02 l l l l l l l 1 1 l l l Power Supply Asay 4020274 03 2 2 2 2 Knob Assy Editing 4030145 10 2 2 2 2 2 2 2 2 Knob Assy Reel 4040492 10 l l l l l l l l 1 l l 1 Scrape Flutter Idler Asay 4040955 01 l 1 l 1 1 l l 1 l 1 1 l Cable Asay Power 4050416 02 2 2 2 2 2 2 2 2 2 2 2 2 Cable AHy Electronics Interconnect 4050442 01 l l l 1 1 l 1 l l l l 1 Box ABSy Head ...

Page 110: ...l l Head Assembly 4 Posltion 4020272 03 1 l l l l 1 l l l l l l Power Supply Assy 4020274 03 2 2 2 2 Knob Asay Editing 4030145 10 2 2 2 2 2 2 2 2 Knob Asay Reel 4040492 10 1 l l l l 1 l 1 l l l l Scrape Flutter Idler Asay 4040955 01 l l l 1 l 1 1 1 l 1 1 1 Cable Assy Power 4050416 02 2 2 2 2 2 2 2 2 2 2 2 2 Cable ABBy Electronics lntercoMect 4050442 01 l l l l l l l 1 l 1 1 1 Box Assy Head Cable M...

Page 111: ...Track 4020273 05 l l l l 1 1 Power Supply Asay 4020274 03 2 2 Knob Assy Editing 4030145 10 2 2 2 2 Knob Asay Reel 4040492 10 1 1 1 1 1 1 Scrape Flutter Idler Assy 4040955 01 l 1 1 l 1 1 Cable Assy Power 4050416 02 4 4 4 4 4 4 Cable Assy Electronics lntercoMect 4050442 01 l l l l l l Box Assy Head Cable M unUng 4050447 09 l 1 Case Assy Transport 4150329 01 1 1 Case Assy 3 4 Electronics 14 4150331 0...

Page 112: ... full track 4020272 04 l l l 1 l l l l Head Asay 2 track 4020272 05 l l l l l l 1 l l l l 1 l l 1 l Power Supply Assy 4020274 04 2 2 2 2 2 2 2 2 Knob Asay edilil g 4030145 10 l 1 1 l l 1 l l l l 1 l l l l l Tray Assy reproducer 4040346 02 l l l 1 1 1 1 1 1 1 1 1 1 1 1 1 Panel Assy facing 4040347 01 2 2 2 2 2 2 2 2 Knob Assy reel 4040492 10 1 1 1 1 1 1 1 1 1 1 1 1 l l l l Idler Assy scrape Uutter 4...

Page 113: ... 1 1 1 Shield Resistor Control Box 4290643 01 l 1 1 1 Shield Resistor Control Box Uncased 4290659 01 2 2 2 2 2 2 2 2 Shield P B Head Connector 4600008 10 2 2 2 2 2 2 2 2 Connector Plub female 3 pln 144 003 l 1 1 1 1 1 1 1 Nutdrlver Modified 493 504 01 TYPE AND AG 445B FOUR CHANNEL DASH NUMBER TAPE REPRODUCER ll ll CODE P Portable Ampex 4010144 Ref C U Uncased 0 0 0 0 II II II II II 1 I I I 9 9 9 9...

Page 114: ...d Resistor Control Box Screw 18 32 x 1 Pan Head Cross Recessed Washer f8 Flat Lockwasher f8 Spring Nut f8 32 Keps Jif Bag f7 14 X 20 cab e Assembly Power Packaging Assembly Tape T ransport Assembly 7 1 2 15 GO Hz Tape Transport Assembly 7 1 2 15 50 Hz Tape Tran sport Assembly 3 3 4 7 1 2 60 Hz Tape Transport Assembly 3 3 4 7 1 2 50 Hz AMPEX 4890301 l mpex Part No 4040955 01 4290659 01 471 084 501 ...

Page 115: ...www SteamPoweredRadio Com SECTION VI HEADS ...

Page 116: ...0831 02 HEAD STACK ASSEMBLY Erase 2 channel 1 4 28 1350068 01 HEAD STACK ASSEMBLY 1 4 Track Stereo playback 29 4350025 01 SHTM Erase Head 010 thick 10 4 350025 02 SHIii Erase Hen cl 002 thick 31 4350025 03 Sllll l E1 asc IIend 003 thick 32 4350025 04 SHIM Erase Head 005 thick 33 4210193 30 TAPE GUIDE 38 4350017 03 BASE Head Mounting 49 4270167 30 SPRING Head 55 4350068 02 HEAD STACK ASSEMBLY 1 4 T...

Page 117: ...JTTED 7 13 FtJR DWG CLARITY 25 Sc OETAIL 4 4890301 01 IZ EC HO 0 0 15LK 15LK euse HD UASE MO 3 2 l J AC S BRW RED BRIii BLK I BLK P 15 HE O P e 1 lEAO 1 4 TeAC SLK 5L K SU I IZED BIZIJ FULL TIZACK 2 TfACK 114 TrlACK WI ft JG DIAGltAM Fig 6 r Head Assemhly Reproduce only inch Tape 6 6 ...

Page 118: ...10 4350038 01 4350017 03 4350019 20 4350022 02 4350024 02 4350029 09 4350033 01 4350033 02 4350035 01 4350029 10 4210136 01 1231888 03 4040558 06 4040558 05 4350025 01 4350025 02 4350025 03 4350025 04 4210193 40 401 008 403 006 470 425 471 481 473 098 492 008 493 001 502 062 600 001 4020273N 6 7 4 0 0 0 N O T E S PAQT NO ro B l AS SY 4020 7 3 xx THE GAP BEf YEEN TH TOP Ol 1E 1 11 A D GA T ANO THE ...

Page 119: ...www SteamPoweredRadio Com JAN 1970 14 4 F0 2 03 FOl2 o4 GA TE A SSY I TEM 3 0 V1ITTEO FOQ DWG C LARI TY 4890301 34 0 3 781 3 TAP Gl 1D S Fig 6 4 Head Assembly Reproduce Only Inch Tape 6 8 ...

Page 120: ...tor assembly 4 track head Standoff head connector Handle head connector Connector male rect 9 pin Rollpin 062 dia x 187 Jg Ampex Part No 4050446 01 4050446 02 4050446 03 4050446 04 4220243 01 4350031 02 143 300 406 272 AUG 1971 ASSY NO A roso 01 1aso oz 4QSQ4111i 0 3 405a44 04 l C Oilil6 05 4890301 0 I SHOWN B Y L YEi TERM NAL LEITER C D ORN BLK 0 fN S LK O N E F Ji J K i 1 Bl NEC eJL BRN K BLK RE...

Page 121: ...l reproduce only Head Cable Box Assembly 2 channel reproduce only Bracket head cable mounting Clamp Assembly cable Clamp Assembly reproduce cable Head Cable Assembly reproduce Rod Switch Cover head cable bracket Wire retaining Switch slide Connector receptacle female 9 socket Marker Strip No 1 Marker Strip No 2 Marker Strip No 3 Marker Strip No 4 Terminal Strip Al Al 0 Bracket head switch Shield h...

Page 122: ...www SteamPoweredRadio Com SECTION VI TRANSPORT l a 0 II a I ...

Page 123: ...on Holder Assembly Idler Scrape Flutter Idler Scrape Flutter Yoke Screw Set cup point 2 56 x 1 8 AMPEX I I I I 4890301 Ampex Part No 4040953 01 4250207 01 4250207 02 4230239 02 477 215 6 11 j__ B 0002 1 JAI A 0002 Tl I 1 B 0002 IN N F0 2 02 FOR OJ 8 t 40 64G MIN 4890301 t F 4 2 PLCS Fig 6 7 Scrape Flutter Idler Assembly 6 11 ...

Page 124: ...bly no replaceable parts Escutcheon assembly left Drive Motor assembly 7 1 2 and 15 ips 60 Hz see Fig 6 18 Drive Motor assembly 3 3 4 and 7 1 2 ips 60 llz see Fig 6 16 Drive Motor assembly 7 1 2 and 15 ips 50 l z see Fig 6 16 Drive Motor assembly 3 3 4 and 7 1 2 ips 50 Hz see Fig 6 16 Capacitor assembly takcup and rewind motors C617 C618 Safety Switch assembly Pushbutton white Pushbutton yellow Pu...

Page 125: ...www SteamPoweredRadio Com 0 0 0 0 d 0 I Fig 6 8 T ti T are ranstiort A bl r ssem y Front Ilo Fig 6 9 AUG 1971 4890301 30 8 PLCS C 4 P L C S Tape Transport Assembly Rear 6 13 ...

Page 126: ...REF E 01 r SOLEIJOIO Bl ACICET I I T 6KE UP AND SUPPL Y BRAKE AD_lUSTME NT 4890301 0l C ONTROL BOX K N ll E D15C0 INE CT CO JlsJE C TIOt 1 t NFOQMATION HAQ Jt 5S WIRE COLOQ BR 1 WHT VtO B1 U l Hr YEL YE L wHT VIO WHT Q E0 2 V O Or 2 REF K1o09 K o09 K o l O l IQ IO CGOI C oOI SC 03 S o0 3 TEl M PAQT DESCRIPTION COI OQ SOLE No o TAPE L I FTER 6LK SOL E NO I O T APE LIICTER BL K 50L E JOIO CAP5rA 1 B...

Page 127: ... hand 2 Link 1 Bracket 1 Spring 2 Pin Clevis 1 8 inch dia Spring Clip Tape Plastic Foam 0 063 thk x 0 187 wide Tape Polyvinyl Foam 0 125 thk x 0 375 wide Items of standard hardware not listed AMPEX Ampex Part No 4030259 03 4040965 03 4040966 03 4230244 01 4260384 01 4270254 01 400 005 4030278 01 225 275 225 298 CHANGEOJAN 1970 Fig 4890301 11 Tape Lifter Assembly Tape Transport 6 15 ...

Page 128: ...ble Drive Plate Connector plug 8 pins male Solderless Connector Motor Assembly Ashland Items of standard hardware wire etc not listed AMPEX Ampex Part No 4030297 01 4030297 02 4030297 03 4030264 03 4040768 02 4040768 08 4130163 02 4320128 10 145 013 171 008 4040768 04 AUG 1971 9 3 PLAC 5 WIRING I II i H 10 4890301 DIAGRAM I 2 3 4 s o 7 8 OQN t 50LE N0l O SRAK c Q B L SoLDvo o E o r TA Kt LJP CONNc...

Page 129: ...turntable Drive Plate Connector plug 8 pins male Solderless connectors Motor Assembly Ashland Items of standard hardware wire etc not listed AMPEX Ampex Part No 4030298 01 4030298 02 4030298 03 4030264 04 4040768 01 4040768 07 4130163 02 4320128 10 145 013 171 008 4040768 03 AUG 1971 flHT 6lK 9 3 PLACE S I 2 3 s 12N G L 7 8 LV WIRING AGRAM 4890301 4 16 RE WINO CONNe CTiON 5 CONNe Cr KNll E CONNE C...

Page 130: ... dng edit brake return Spring compression Cross Head brake Anchor brake Housing brake Clamp band link Anchor spring edit solenoid Bolt spade Solenoid brake K605 thru K607 Cwmector solderless BRAKE ASSEMBLY CATALOG NO 4030264F See Fig 6 14 DESCRIPTION Items of standu d hardware not listed Ampex Part No 4030264 03 4030264 04 4040414 10 4220141 10 4230161 10 42 10162 10 4230163 10 4260183 10 4260386 ...

Page 131: ... guide mounting Washer 003 thick Washer 025 thick Spring compression Bearing ball Retaining ring Internal NOTE Items 2 5 and 8 not replaceable separately Contact Ampex Technical Support Professional Audio for information if replacement is required Ampex Part No 4040970 02 4040408 80 4200121 10 4210311 01 4230245 01 4270160 20 4290272 10 4290273 10 4400593 01 4440282 01 4440282 02 352 084 421 116 4...

Page 132: ... drive Connector plug 6 pins male Screw set hex socket cup point 10 32 X 1 4 Flywheel NOTE Capstan hard chrome plated drive motor Ampex Part No 4040993 01 4040993 02 4040993 03 4040993 04 4250113 10 4590120 01 4590120 02 4590121 01 4590121 02 145 012 477 336 4250114 10 AUG 1971 1 Vl ilrE wH1ra SLAC K Bt U VI IIr 0tfl WHIT G O QANG jQ N BL LI IILACX AAIGt Q v Nll ING DIAGlcAM R EF I 2 3 4 5 G 48903...

Page 133: ...www SteamPoweredRadio Com SECTION VI TRANSPORT CONTROL J 0 a 1 z 0 u l a 0 Q I z ct a I ...

Page 134: ...607 Resistor adjustable wirewound 150 ohm 55W R604 606 R608 Transistor Q606 Lamp 120V 025 amp DS601 Fuse 3 amp slo blo F601 F602 Fuseholder short body Capacitor electrolytic 150mFd 180 vdcw C614 Resistor virewound 40 ohms 20W R609 Resistor fixed comp 47 000 ohm lW R611 Socket relay Washer mica transistor mounting Washer shoulder nylon Clamp capacitor Clamp cable plastic 7 16 ID Connector power mal...

Page 135: ...amPoweredRadio Com See OET 4 L DETAIL II SCAt G NONE 2 PLACES 2PLCS b ScE OcTAIL IJ DETAIL SCALe NONI SEE 0 TAIL II DBJ L I SC f e 2 PlfCeS VIEW I I OcTA1L It SCAL VONe 4890301 Fig 6 18 Control Box Inner 6 22 ...

Page 136: ...www SteamPoweredRadio Com SECTION VI ELECTRONICS I z 0 a 1 w J w ...

Page 137: ...mposition 680 ohm l 4W 10 Resistor Composition 33K ohm l 4W 10 Resistor Composition 47K l 4W 10 Resistor Variable 500K ohm Transistor Silicon Capacitor Tantalum 330µF 6V Schematic Schematic Transistor Transistor Mounting Pad AMPEX Ref No CR613 619 622 Q605 C619 C621 R625 RG20 R618 R616 621 622 R617 R624 R623 R619 QG03 C620 Q604 Q605 4890301 Ampex Part No 4500035 01 013 678 014 247 031 939 031 940 ...

Page 138: ...Safety Boot Solderless Connectors Capacitor tantalum 330 mfd 6 vdcw Same as C617 for rewind motor Oiode silicon large signal rectifier Same as CR601 Same as CR601 Same as CR601 Same as CR601 Same as CR601 Same as CR601 Same as CR601 Same as CR601 Same as CR601 Same as CR601 Same as CR601 Same as CR601 Same as CR601 Same as CR601 Same as CRf 01 Lamp incandescent 120 volts 025 amp Fuse slo blo 3 amp...

Page 139: ...11 oov I L _____J iL EDIT K REWI I 4890301 C617 08602 I 1 l K O 1 6 vlc lv L 7 9 I I I RI I CROl4 4 13 fC i 2 14 I I O ll 1 III t t H r T oil 8 1 t MlL t 1ci J 60 3 t 5 i 3 J ICA A r EI P602PIJ602S f P603P TOR TOR 2 VAC 1 i A_K_E_ _pSY_MO_T_OR_I cHr u t i o i 0 l h lr Di I I l l l l 9 9 i rtT7R610 4 R613 1_7 t 1 HIG 4 I 5 180 I 1_1 100 I 1 CA609 14 OW I 5 l 1 C I_ _ ___ HIGH S l 20W R6II C6II I OW...

Page 140: ...CONTROL I I 606S I P706 I r 1 I I I I I I HI 2 3 6 _ _ _ _J 2 3 6 CAPTIVE CABLE VOLTAGE REGULATOR 7 7 7 39 1 t 9 9 5 5 I F101 J101 o J704 l__ELECTRONIC POWER SUPPLY _j 4890301 7 1 6 6 TO ELECTRONICS 9 9 5 5 r i4JII I ELECTRONICS ASSEMBLY L_ _ _ _ _ A 139 Fig 6 21 Schematic Diagram Transport Power Supply 6 26 ...

Page 141: ...me As R710 Resistor fixed comp 100 ohms 10 l 2W RC20GF101K Coil bias oscillator Transformer power supply Diode silicon zener 13 volt 5 Diode silicon zener 24 volt 5 Card Guide Fuse holder short body Pad transistor for Q703 Q704 NOTE All items except those marked with are on printed circuit board Catalog No 4050432 05 AMPEX 4890301 Ampex Part No 056 108 034 507 034 994 055 106 031 945 4550147 03 03...

Page 142: ...2W 10 Resistor Fixed 2 2K ohm l 2W 10 Resistor Fixed 3 9K ohm l 2W 10 Resistor Fixed 22K ohm l 2W 10 Resistor Fixed 1 2K ohm lW 10 Resistor Fixed 24 ohm 1 2W 5 Resistor Variable lK ohm 1 l0W Capacitor Mylar lµF l 0OV 10 Capacitor Mica 6800PF 500V 5 Resistor 1 ohm 5W 5 Resistor 20K ohm l 2W 5 Transistor Pad Resistor Fixed 100 ohm l 2W 10 AMPEX 4890301 Ampex Ref No Part No 4500105 02 T701 CR705 707 ...

Page 143: ...omp 100 ohm 10 l 2W RC20GF101K Transformer power supply Diode silicon zener 24 volt 5 Card Guide Fuse holder short body Pad transistor for Q703 Q704 NOTE All items except those marked with are on printed circuit board catalog no 4050432 06 AMPEX Ampex Part No 031 945 4550147 03 055 106 031 205 013 678 013 599 070 075 146 018 145 013 014 704 014 590 014 796 014 653 041 158 041 529 041 048 059 016 0...

Page 144: ...ASSEMBLY 1 1 17 4050440 02 BRACKET ASSEMBLY Capacitor l lountlng 1 1 l 19 4220245 01 SPACER Chassis l l 1 20 4230133 02 GUIDE Printed Wiring Board 6 6 6 21 4290187 01 SHIELD Enclosure rear 1 1 1 22 4290188 01 SlllELD Selector Switch l l 1 23 4290661 01 COVER Module Enclosure l l 1 24 4290661 02 COVER Module Enclosure 1 1 1 25 6000035 02 LABEL Identification 1 1 1 26 4050468 01 JUMPER PLUG ASSEMBLY...

Page 145: ...0 280 131 43 034 180 80 4840209 S2 4840169 4050435N AUG 1971 VENDOR OR MIL ND SCHEMATIC REFERENCE PART DESCRIPTION R26 RESISTOR Composition 510 ohm 1 2W 5 TRANSISTOR Pad 200 diameter Cl9 CAPACITOR Mica 500V 39PF 5 SCHEl 1ATIC SCHEMATIC I SHEET 2 OF 2 I NHA 4020260 QUANTITY REQUIRED PER VERSION 03 05 1 1 3 3 1 REF REF G 32A B ...

Page 146: ...W 10 R90 91 Resistor 22 ohm l 2W 10 R87 Resistor 51 ohm l 2W 5 R83 Resistor fixed 1 6k ohm lW 5 R86 Resistor 3k ohm 1 2W 5 R84 85 Resistor 20k ohm 1 2W 5 R88 89 Capacitor mylar lmFd l00V 10 C41 43 Resistor wirewound 180 ohm SW 5 R82 Transistor pad 200 diameter Screw 4 40 x 1 4 pan head Nut lex 1 4 32 Nut hex 3 8 32 Washer flat 114 Washer lock 1 4 Washer flat internal tooth 1112 Washer flat interna...

Page 147: ...0pF Capacitor Trimmer 300 1180pF Capacitor tantalum 3 3µF 35V 20 Schematic Capacitor mylar 0022µF 50V IO Resistor fixed 18k ohm 1 4W 5 REPRODUCE EQUALIZER PRINTED WIRING ASSEMBLY 4020270 Revision C See Figs 6 24 and 6 25 Description Printed Wiring Board reproduce equalizer Potentiometer 30k ohm Potentiometer 2 5 megohm Resistor 220k ohm 1 8 V 10 Resistor 2 2k ohm 1 SW 10 Capacitor 0047mFd mylar Sc...

Page 148: ...TH A HIGH IMPEDANCE VTVM INDICATES VOLTS R M S MEASURED WITH A HIGH IMPEDANCE VTVM AT OPERATING LEVEL OF IOOOHZ INDICATES VOLTS R M S MEASUREO WITH A HIGH IMPEDANCE VTVM AT BIAS FREQUENCY JAN 1970 I 9Rl7 I I5K READYI I I 514 L 7 II I I 9C9 I 35 50V I I 0 4CR9 10 8 4JII r ___ TABLE I t FOR FIELD SERVICE ONLY TRANSISTORS MAY USE IOI 102 209 THRU 2013 2N3117 OR 2N5088 103 104 2N4946 105 2N3906 106 20...

Page 149: ...41 067 041 068 041 069 041 070 041 072 041 078 041 080 041 082 041 241 041 361 041 377 041 898 280 131 475 006 501 008 4030270 01 4840169 4110270 01 6 31 r 7 I I 5J1ol 2 ny1 I SJ10 4 l l I ____ ____ 2R52 b I I IIOK 5 ill I I I I 2C24 2R48 I IM 5 l IOOV m i I I 2R50 100 2C28 10 25Y 2R51 IIOK 5 2R57 IOOK r IIC52 0 IIRI08 6 fill RI09 L ASSY NO 4020269 XX _ J 2C25 2C26 68 47 2R64 IOOK 2C30 l IOOV 2R59...

Page 150: ...446 CG 14 CAPACITOR Tantalum 15MF 15V 20 2 2 19 037 494 Cl 5 CAPACITOR Tantalum 47MF 6V 20 2 2 20 041 012 R4 RESISTOR Composition 4 3K ohm 1 2W 5 1 1 21 0H 5 33 R30 31 RESISTOR Fixed 24 ohm 1 2w 51 2 2 22 0ll 273 R27 RESISTOR Fixed 270 ohm 1 2W 5 l l 23 041 046 RG 28 RESISTOR Fixed 680 ohm l 2W JO 2 2 24 041 048 Rl RESISTOR Fixed lK ohm 1 2 V 10 l 1 25 011 010 R29 RESISTOR Fixed 2 OK ohm 1 2W 5 1 ...

Page 151: ...U WASHER Flat 4 WASHER 3 8 flat LOCKWASHER 3 8 flat internal tooth ISHEET 1 OF 2 INHA 4010141 44 QUANTITY REQUIRED PER VERSION 03 05 l 1 1 1 J 1 1 1 1 1 1 l 1 1 1 1 1 1 1 1 1 1 1 IA R A R A R A R l I 2 2 1 1 1 l 1 1 2 2 2 2 1 1 1 I 1 1 1 1 2 2 2 2 4 4 12 12 2 2 2 2 2 2 1 1 2 2 l l 10201501 J5 MONITOR I 1 7 h c c 1a 02 f J3 500V I r cl _________ 1 I I I I J31 C2 3 3 35V L_______ NOTE I UNLESS OTHE ...

Page 152: ...lon A R IA R 10 i15 002 WffiE 1122 AWG bare A R A R 11 0 10 001 CI8 CAPACITOR 02µF SOOV 1 l 12 0 11 0 IO n 1 1 RESISTOR Fixed 220 ohm 1 2 V 10 1 1 13 118 015 J5 JACK Phone with Hardware 1 1 1 1 61 l 021 CABLE Shielded Jacketed white 1126 AWG AIR A R 15 501 186 WASHER l4 flat 2 2 IG 502 101 LOCKWASIIER lt4 2 2 18 1050 l l5 07 PRINTED VlRING BOARD Reproduce Amplifier 1 50 60000 15 02 LABEL Identific...

Page 153: ...USE HOLDER 4050439 SWITCH Rotary l Pole 2 throw CONNECTOR Receptacle 3 contact male CONNECTOR Receptacle 2 contact male CONNECTOR Receptacle 1 contact male CONNECTOR Audio Receptacle 3 socket CONNECTOR Audio Receptacle 3 pin KNOB Black w Pointer CAPACITOR Ceramic 02µF 500V CAPACITOR Mica 1500PF 500V RESISTOR Composition 180 ohm 1 2W 10 RELAY 24V 650 ohm 4P2T SPRING Relay holddown DIODE RELAY Reed ...

Page 154: ...ANEL Facing SWITCH Lever KNOB Pointer CAPACITOR 02MF ceramic 500V CAPACITOR 220PF mica 5 300V RESISTOR 560 ohm 2W 10 RESISTOR Variable carbon 2W l00K ohm 10 RESISTOR Variable carbon 2W l0K ohm 20 CHOKE 5MH SOCKET Light LIGHT Indicator amber LIGHT Indicator red LIGHT Indicator clear PHONE JACK SWITCH Selector RETAINER C Lite TERMINAL STRIP Al G Al Al Al BRACKET Meter Lamp CLIP Lamp KNOB Black Skirt...

Page 155: ...AUG 1971 CATALOG NO 4050441 PART DESCRIPTION PANEL Right Side TRANSFORMER Output RESISTOR Composition 4 3K ohm l 2W 5 RESISTOR Fixed 220 ohm l 2W 10 RESISTOR Fixed 2 4K ohm l 2W 5 RESISTOR Composition 9 IK ohm I 2W 5 TIE POINT Al Al G Al Al Al I SHEET I OF 1 rNHA 4020260 QUANTITY REQUIRED PER VERSION 03 04 l 1 l l l 1 l l I 1 1 1 2 2 4050441C KEO 8 lN R 32 4890301 01 0 Fig 6 28 Right Hand Panel El...

Page 156: ... 013 678 CR3 4 8 AUG 1971 CATALOG NO 4050440 ISHEET 1 OF 1 I NHA 4020260 PART DESCRIPTION QUANTITY REQUIRED PER VERSION 02 BRACKET Capacitor Mounting 1 CAPACITOR 350 750 250MF 35 25 25V 1 CAPACITOR 1500MF 40V 1 CAPACITOR 100 100 35 35MF 50V 1 RESISTOR OK ohm l 2W 10 2 RESISTOR 15K ohm l 2W 10 2 RESISTOR 750 ohm lW 5 1 RESISTOR 4700 ohm l 2W 10 1 DIODE 3 4050440C j I Ii u CR8 0 R78 Fig 6 4890301 01...

Page 157: ...www SteamPoweredRadio Com SECTION VI ACCESSORIES AND MISCELLANEOUS ...

Page 158: ...light Light indicator amber Light indicator red Light indicator green Clip lamp holder Resistor fixed comp 180 ohms 10 l 2w RC20GF181K Strain Relief Cable assembly remote control captive Connector plug 12 pins male Cable 12 conductor Pushbutton green play Ampex Part No 4040997 01 4040999 01 410Cl83 0l 4100183 02 4100183 03 4110274 01 4620144 10 4620144 20 4620144 30 132 098 132 099 132 100 060 338...

Page 159: ...sistor metal film 22 100 ohms 1 l 4w Resistor fixed comp 620 ohms 5 1 2w RC20GF621J Resistor fixed comp 9 100 ohms 5 1 2w RC20GF912J Resistor fixed comp 1 3 megohms 5 1 2w RC20GF135J Same as Rl Resistor metal film 47 500 ohms 1 1 4w Resistor fixed comp 1 800 ohms 5 l 2w RC20GF182J Resistor fixed comp 22 000 ohms 5 l 2w RC20GF223J Transformer microphone Sockets transistors Can plug in Ampex Part No...

Page 160: ... 3 i S 120 ISIC 1 ills NAB 15 1 s NAB 4890301 01 REPRODUCE 20 r r TU T _ r r r r nn r r i n l l 1 r r _ _ _l I FE _E _ 1 t _____ _ r 10 0 __ 10 f 20 r 30 t 20 1 10 f 1 _ _ _ 0 I 0 0 I 10 D I _ P t t 1 f tt bo f f t I 1 _ r I I f I I REPRODUCE 1 1 f r r _ __ ___ _ _ 1 r 1 1 __ 1 t r 1 f I 1 10000 1 1 l t _ _1 _ l _ iH _ t l 1 r 20 I 1 I I f 0 i _ 30 20 10 f _ I f 0 I 1 10 t _ I 20 I 30 1 1 I I 11 1...

Page 161: ... f 10000 0 20 _ _ e 10 __ 0 _ I t 7 ips CCIR 10 I 20 t _ I 30 _ 20 10 0 15 ips CCIR o 20 30 1 r I t t _ f E r _ f _ __ E _ i r r r L T J 100 r I I I tl REPRODUCE __ __ _ _ i __ 1 __ I I 1 _t _ I r I _ _ J I 1 I t I 1000 UPIODUCE I _ I 1 1 1 _ I I I I __ _ I _ 4890301 01 _ __ c _ i 1 _ _ l I f I 0 I ____ _ 1 I c r __ __ l t 1 t 11 100 r i __ I _ t _ t_ _ 1 f _ 1 _ __ I L _ __ I C 1000 Fig 6 33 Resp...

Page 162: ...www SteamPoweredRadio Com r __ 6 00 TNRU WO WHT 4890301 0l 0 0 SCIIEMAT C Z ACRAM Fig 6 34 Cable E ectronicc 6 44 ...

Page 163: ...www SteamPoweredRadio Com PART NQ 40 ScJ4 0 4890301 01 cO WHIT BLAC I SCf lEMAT C DIA JRAM Fig 6 35 Cable Power 6 45 ...

Page 164: ...www SteamPoweredRadio Com MODIFICATION PROCEDURES ...

Page 165: ... stopping tape motion a Connect a jumper wire fromQ601 emitter to the negative side of diode CR605 b Disconnect the base lead of Q601 to protect the transistor AMPEX 7A 2 2 MODIFICATION TO DEFEAT ALL OR ANY OF THE EDIT FUNCTIONS The three edit modes of the AG 440 AG 445 are stop edit play edit and fastwinding edit a To defeat the stop edit mode disconnect the lead connected to pin 6 of edit relay ...

Page 166: ...h two normally open contacts Licon 79 2920 or equivalent b Connect the two wires discon nected from the normally open contacts of the original switch to either open contact of the new switch Solder the ends of the other two disconnected wires to gether and tape the connection this forms the same circuit as the jumper wire connected in step c of the preceding paragraph c Connect the other open cont...

Page 167: ...l V DC CONTROL __ AC CONTROL 401718A 115 V 1 l I_____ m II o IP L A Y 1 _ 7 o tc 607 SUPPLY K608 SUPPLY 115 voe CONTROL 7A 2 3 IZ 8 F W0 4 IZ NEW EDIT SWITCH L Z V K60Z 9 PLAY 5 S608 PLAY S605 REWIND K60l OIT K601 REWIND RELAY 24 voe CONTROL 4890301 01 S606 STOP 1 EITTONICS 7 I SAFE I 7A 2 2c 7A 2 2d Fig 7A 1 Tape Transport Mode Alterations 7A 3 ...

Page 168: ...mPoweredRadio Com N C EDIT SWITCH S611 401719A tPl cs 1 1 Ci 8 DeTAIL 13 SC AL NONC CR605 I 0 I 2 3 4 5 6 7 8 9 10 11 12 EDIT RELAY K603 Ji c e 4890301 01 I tP csE 6ACS P C Fig 7A 2 Control Box Components 7A 4 ...

Page 169: ...AL WIRING ADDITIONS AND CHANGES Proceed as follows to modify internal wiring of the transport control box Step 1 Remove transport control box as directed in paragraph 4E 11 2 of this instruction manual Section 4 Step 2 Locate SPEED switch S602 and receptacle J 607S Step 3 Locate the white violet wire between terminal A of switch S602 and pin 3 or 4 of receptacle J607S Note that there are two white...

Page 170: ...of ac line of MDA mating plug This connection assigns power control to the tape transport POWER switch and safety switch Step 2 Connect MDA precision fre quency power output to return to the tape trans port through pins 7 low and 8 hot of MDA mating plug Step 3 Verify that wiring is correct then insert MDA mating plug in receptacle J 604S Connection of MDA is complete 7B 4 PREPARING DUMMY PLUG For...

Page 171: ...irTt26 Eif I ALL RESISTOR VALUES ARE IN OHMS 1 2 WATT 10 y I j 1 ycR61 Zv CR622l I LAST REF DES USED 2 ALL cAPAc1ToR vALUEs ARE 1N M1cROFARAOs AT wl Ml 1 1 3 CA 0 PE 013 678 i f 7 iit621r mI r I 4 FOR FIELD SERVICE ONLY CR62 iR617 l C620tR616 I OK i I MICOR0 TOP R62O w1 I f bO 5611 C62 1 Tfl02 CH622 0 6 0 t IJ r ro1 JW7S 1 610 P607P 0606 Rfi2 REF DES r T USED Cllf 07 CR610 J t C 606 014 6l0 _J UP ...

Page 172: ...for a recorder reproducer with up to four channels or No 4850111 02 for a 4890301 01 Section 7 MODIFICATION PROCEDURES Part C Sel Sync Remote Control 7C 2 7C 2 1 recorder reproducer with from five to eight channels SWITCHING UNIT GENERAL One switching unit is required for recording up to four channels and two identical units are required for five to eight channels The following instructions descri...

Page 173: ...ng plug on the power jumper cable to J3 POWER SUPPLY receptacle Step 7 Connect the Catalog No 4050467 02 cable supplied between the switching unit J2 ELECTRONICS receptacle and each re cord reproduce unit J14 four pin receptacle 7C 3 7C 3 1 CONTROL UNIT GENERAL The two versions of the control unit are Catalog No 4020294 01 for equipment with up to four channels and Catalog No 4020294 02 for equipm...

Page 174: ...the tape and align heads to the beginning of the recording At the recorder reproducer set OUTPUT SELECTOR switches for the recorded channels to REPRO Step 3 At remote control set READY SAFE switch es for the recorded chan nel s to SA FE 4890301 01 Step 4 For the channel s to record the second run set READY SAFE switch es to SAFE Step 5 Press the SYNC REPRO pushbutton pushbutton lights and PLAY REP...

Page 175: ...pex Standar d Alignment Tape listed on Table 1 7C 5 2 SEL SYNC LEVEL ADJUSTMENT Step 1 Set each record reproduce unit RECORD SELECTOR switch and all READY SAFE switches to SAFE Step 2 Thread the correct Stan dard Alignment Tape on the tape transport Step 3 Set all record reproduce unit OUTPUT SELECTOR switches to REPRO Step 4 Move the alignment tape to the operating level tone the first tone on 15...

Page 176: ... 1 Instru tion pamphlet 4890301 01 TYPE OF ALIGNMENT TAPE EQUALIZATION 1 4 inch NAB 01 31311 01 CCIR 01 31313 01 NAB 01 31321 01 CCIR 01 31323 01 120 micro sec 01 31331 01 200 micro sec 01 31334 01 Table 7C 1 Standard Alignment Tapes REMOTE CONTROL SEL SYNC FOUR CHANNELS System Catalog No 4010129 01 REMOTE CONTROL SEL SYNC EIGHT CHANNELS System Catalog No 4010130 01 AMPEX 1 2 inch 01 31311 05 01 3...

Page 177: ...ale 2 pins JS X Same as J4 J6 X Same as J4 J7 X Same as J4 J8 X Same as J4 J9 X Same as J4 Jl0 X Same as J4 JU X Same ae J4 J12 Connector receptacle male 3 pin Jl3 X Same as Jl2 J14 X Same as Jl2 JlS X Same as Jl2 Jl6 X Same as Jl2 Jl7 X Same as Jl2 Jl8 X Same as Jl2 Jl9 X Same as Jl2 Kl 4 Relay K2 X same as Kl K3 X Same as Kl K4 X Same as Kl Ql l Transistor silicon npn power type Q2 4 Transistor ...

Page 178: ...s Rl Switch dpdt READY SAFE Same as Sl Same as Sl Same as Sl Same as Sl Same as Sl Same as Sl Same as Sl Switch pushbutton SYNC REPRO Same as S9 PLAY REPRO Switch momentary normally open REWIND Same as Sll FAST FORWARD Switch momentary normally open RECORD Same as Sll PLAY Switch momentary normally closed STOP Same as SlS EDIT Bracket relay Bracket switch Button PLAY REPRO Button SYNC REPRO Button...

Page 179: ...redRadio Com 4890301 01 8 CHANNEL 4 CHANNEL il 2 iFlfWDj ___ ill il 3 1 o jl LAYj 14 STOP 1 l S15 CIU CR3 013 678 2 0 0 READY t SAFE OS3 OS4 Pl 5THRU8 I I 2 READY l SAFE 0S7 DSB Fig 7C l Control Unit Schematic 7C 8 ...

Page 180: ...I 330ul t R2 5K Cl 1400 306 PF llllAPI t 9 CZ PF 300V Oi6P3 CRT CR8 0 3 599 2 R7 1 ZW ClO 2 2ul 35V A a BOTTOM VIEW 03 Dl8P3 CR2 013 678 L2 330uh C3 1400 CR9 CRIO 013 599 2 K3 04 Dl6P3 CR3 013 678 llllAPI S 4890301 01 CRII CAIZ 013 599 2 K4 Q5 018 5 CR4 013 1178 ITRAPI Fig 7C 2 Switching Unit Schematic 7C 9 ...

Reviews:

No comments

Brands by name

Popular brands

Load more brands