Ampex-MM-1100-Operation-Maintenance-1972.10.20 电路图 维修手册.pdf

c .: ! ( ,/ . . 0 . . . . . : : / - ,. . . . . . -. . : -,. . . . _. . . tfl t . - - , nrR E p pqr.J3r - _. -1 ; . . f I . . .:.: L . - ._ . . , . TABLE OF CONTENTS DESCRIPTION . . GENERAL . TAPE Tf,lANSPORT ASSEMBLY . SUPPLY AND TAKEUP REEL ASSEMBLIES. CAPSf .A.N DRIYE ASSEMBL y. CAPSTAN PINCH ROLLER . . TENSION SENSOR .ASSEMBLY END-OF-TAPE ARM . . . . . TAPE LIFTER ASSEMBLY . TAPE TIMER ASSEMBLY (OPTIONAL) . TRANSPORT CONTROL ASSEMBLY . . . MOTOR .DRIVE AMPLIFIER ASSEMBLY HEAD ASSEMBLY . ELEC_ TRONICS ASSEMBLIES CONTROL BOX ASSEMBLY METER PANEL ASSEMBLY pQWER SUPPLIES. SPECIFICATIONS . INST:ALLATION EQUIPMENT SITING ,UNPACKING . . . . POWER REQUIREMENTS CABLE COIINECTIONS OPERATION . . . . . _ .CONTROLS AND INDICATORS . OPERATING PROCEDURES iii Page 1 1 1 2 2 2 2 3 3 3 3 4 4 4 6 6 7 .7 11 11 11 11 12 13 13 17 TABLE OF CONTENTS (Continued) OPERATION (Cootir;-iued). MAKING A RECORDING -WITHOUT SEL SYNC MAKING A RECORDING -WITH SEL SYNC . REPRODUCING A PREVIOUSLY RECORDED TAPE FAST WINDING SEL SYN QPERATION , MAINT.ENANCE . . cLANING . . . : DEMAGNETIZATION LUBRICATION . . . . CAPSTAN SERVO . . . SPED PAIR SELECTION VARIABLE SPEED TAPE MODE SERVO GAIN ADJUSTMENT TRANSPORT CONTROL . SETUP PROCEDURE . Preliminary Procedure . Normalizing Reel Servos TENSION ADJUSTMENTS Stop Tension . Play Tension . . . . . . Shuttle Tension . . . . . 15/27-VOLT AND 39-VOLT POWER SUPPLIES. VOLTAGE ADJUSTMENTS CONTROL BOX . . . . . . . . . . . . . . BULB REMOVAL . . . . . . . . . . REMOTE CONTROL AND TRANSPORT-ONLY CONTROL . MDA ASSEMBLY . . . . . . METER PANEL ASSEMBLY HEAD ASSEMBLY . . . . . TAPE LIFTER ADJUSTMENT . TEST EQUIPMENT . . . BRAKE ADJUSTMENT . . . . iv - j ; - Page 17 18 20 21 21 23 23 24 24 25 25 25 25 - 26 26 26 26 , 27 27 28 28 28 29 29 29 31 31 31 31 32 32 33 .-, 55 dB; peak record level to unweighted (30Hz to 18 kHz) olse; iciudes bias, erase, ad reproduce amplifier noise. (Peak:record level corresponds-to a tape flux of 370 nWb/mf . . 30 or 15 in/s: 1000 Hz 1. Using Ampex 496 tape or equivalent, .1.0% at recorded flux level 3 dB above 185 nWb/m Ampex , operating level). 2. Using Ampex _404 tape or equivalent, 1.0% at recorded flux level of 185 nWh/m (Ampex operating level). Even Order Harmonic Distortion At 1000 Hz, 0.3% at a:recorded level corresponding to 6 dB above a tape flux of 185 Wb/m. -; - Bias/Erase Frequency 150 kHz 2% Erase Depth At 1000 Hz, pea record level signal erased to -75 dB minimum on channel(s) selected 8 ,.t Table 1. Specifications (Continued) PARAMETER SPECIFICATION Flutter 15 and 30 in/s: 0.08% peak weighted per ANSI S4.3/DIN 45507, in a band 0.5 to 200 Hz, while reproducing a 3150 Hz signal. (0.08% NAB unweighted; 0.1% peak unweighted.) Crosstalk -50 dB minimum for 8 or 16 channels at 500 Hz -45 dB minimum for 24 channels at 500 Hz Timing Accuracy 0.1 % ( 1.8 seconds in a 30-minute record time) for tape recorded, rewound, and reproduced on the same unit Tape-Position Index Reads hours, minutes, and seconds, with repeat accuracy of 0.1% at 15 ips. Tape Speed Accuracy Within 0.05% from beginning to end of reel. Tape . speed unaffected by line voltage or line frequency fluctuations (per NAB Standrd on Magnetic Recording and Reproduction, 1965, Section 2.02.01) Reference Osei I lator 0.01 %, 0 degrees C to 65 degrees C Heads 8, 16, and 24 tape stacks are non-adjustable precision- mounted - Start Time Full speed within 0.5 seconds at 15 ip_ Rewind Time 2.0 minutes for 10.5-inch reel of 1.5-mil tape - Power Requirements 105 to 125 vac, 48 to 62 Hz ., MM-1100:8 0.8.0 kVP:fuaximum 1 , . MM-1100-16 1.0 kV A maxmum .withou-accessories MM-1100-24 1.2 kV A maximum - . 9 INSlALLA:TION EQUIPMENT SITING The inallation sit for the MM-1100 should be free of strong electromagnetic and elec:tr9static fields :which, could interfere with . or degrade .system operation. The environment ,;huld . be _ resenably dust-fre; ambielt temperature should be from 32 to 122 degrees F (0 ito !JO degrees C);:_ relative h_ umidity should be 10 to. 90 . percent; and no less than six inches of vetilaj Jon spaj:e: :sbold ;b left behind the machine. The system requires 28 by 27 inches of flor space, . plus. access ahd reel clearances. UN P : A CK I NG Upon receipt, examine the shipping crate for any signs of damage. Unpack the equipment and inspect for. physic!. gamage. Check the pac:king list to determine that al I items have been received lmmediately,.-,report any damages (retain the shipping carton) aod shortages-to the Ampex distributor and the tr.ansportti(?n company. Remove all materials (adhesive tape , rubber bands, etc.) used to secure faphandling and other moving componenJs during . shipment. POWER REQUIREMENTS The MM-1100 requires 115 volts at 50 or 60 Hz. Power is connected by a grounding-type (three-prong) pll:19 CAUTION BE SURE THE . POWER PLUG IS PROPERLY GROUNDED BY MEANS OF THE CENTER PRONG. 11 CABLE CONNECTIONS Audio signals are connectd to and from the MM-1100 by the rear panel connectors shown in Figure 5. The connectors are three-conductor XLR-type; females are used for the input con- nections, while males are used for the output connections. The mating plugs are user-supplied, XLR-type, and should be used with shielded-pair audio cable to provide inpu_ t arid output con- nections to the. MM-1100. Refer to Table 1 for input and output level and impedance specifications. .UOIO INPUTS AUDIO OUTPUTS AUDIO INPUTS AUDIO OUTPUTS Figure 5. MM-1100 Input and Output Connectors 12 f. OPERATION CONTROLS AND INDICATORS Operator controls and indicators are provided on the system control box, the individual electronics assemblies, and the meter panel. (Refer to Figure 6.) The control box is shown in Figure 7 and described in Table 2. The electronics controls are shown in Figure 8 and described in Table 3. TAPE TRANSPORT SYSTEM CONTROL 2:;= BOX - METER PANEL - POWER _ PANEL ELECTRONICS ASSEMBLIES Figure 6. Location of System Components 13 FIG. 7 INDEX NO. 1 2 3 0 Figure 7. System Control Box, Controls and Indicators Table 2. System Control Box, Controls and Indicators NAME READY/SAFE rocker switches SEL SYNC/REP RO rocker switch INPUT MON/NORMAL MON rocker switch FUNCTION Permit channel selection for recording. In READY, enable recording on the corresponding channel. In SAFE, no recording is permitted on the corres- ponding channel. In SE L SYNC, causes al I channels to reproduce from the record heads. In REPRO, causes all channels to reproduce from the reproduce heads. (Sel Sync operation is described later in this section.) In INPUT MON, causes the audio input to be con- nected directly to the audio output of those channels with their READY /SAFE switches set to READY. In NORMAL MON, causes all audio outputs to be derived from off-tape only. 14 , . Table 2. System Control Box, Controls and Indicators (Continued) FIG. 7 INDEX!(). 4 5 6 7 8 9 10 , NAME FUNCTIOIJ t . T:Ag SPEED 15/30 Permits selection of tape speed . rocker switch LIFTER DEFEAT push-Defeats operation of the tape lifters so that the button switch tape may be monitornd during the fast forward and rewind modes, and lifted from the heads in play and stop modes STOP pushbutton switch Stops the transport from any operating mode. Also used to halt the recording of all channels without stopping the trim.sport if the RECORD pushbutton is held while the STOP pushbutton is momentarily pressed FAST FORWARD pushbutton Causes the tape to move forward in the fast mode REWIND pushbutton Causes the tape to reverse in the fast mode switch PLAY pushbutton switch Places the system in the reproduce mode RECORD pushbutton Pressed simultaneously with th, PLAY pushbutton switch to place the system in the recofd mode. Only .those channels with their READY/SAFE. switches set to READY will record; those with .the switch in the . . SAFE position will repr_odLJ.ce uing:thehect selected by the SEL SYNC/NORMAL switch 15 Figure 8. Electronics Module Controls Table 3. Electronics Module Controls FIG. 8 NAIVIE FUNCTION INDEX NO. 1 NORMAL/SET UP/BIAS In NORMAL, vu meter monitors the reproduce out- switch put; in the record mode, vu meter monitors the input. In SET UP, causes the system to reproduce while in the record mode with the reproduced audio output connected to the vu meter. In BIAS, connects the output of the bias amplifier to the vu meter. 2 RECORD control Adjusts the level of the signal being recorded 3 SEL SYNC control Adjusts the level of the reproduced signal when the SEL SYNC/REPRO switch is in the SE L SYNC position (Sel Sync mode). 4 R EPRO control Adjusts the level of the reproduce signal when the SEL SYNC/REPRO switch is in the REPRO position (normal reproduce mode) 16 r j I j i I , r I I i i + OPERATING PROCED ORES MAKING A RECORDING -WITHOUT SEL SYNC To make a recording without using the Sel-Sync feature, proceed as follows: 1. If necessary, clean and demagnetize the tape path as described in the Maintenance section. 2. To apply power to the system, open the cabinet front doors and place the POWER switch (in the upper right corner) to ON. 3. If not previously done, calibrate the reproduce amplifier levels as described in the Maintenance section. 4. Thread a bulk-erased reel of tape onto the transport as shown in Figure 9, and close the head gate. , NOTE It is . good practice to bulk-erase all tape prior to using it for recording. SUPPLY REEL TAKE-UP REEL Figure 9. Tape Threading Path 17 5. On the system control box: a. Set the TAPE SPEED switch to the desired recording speed. b. Set ,the lNPUT MOIJ/NORM MON switch to NORM MON. c. Set the SEL SYNC/REPRO switch to REPRO. d. Se! the READY/SAFE switches of those channels to be . recorded to the READY position; all others to SAFE. 6. Open-the front cabinet doors and set the NORMAL/SET UP/BIAS switch of the channelt to be recorded to the SET UP position. 7. With the audio sources connected to the appropriate chan!lel inputs, perform a test or rehe.;:irsal run by simultaneously pressing the PLAY and RECORO switches. During rfhis test run, adjust the appropriate individual RECOt4D level cqntrols-(oh the electronics assemblies) to obtain audio peaks of O vu . on the corresponding vu meters. 8. When each of the RECORD level controls has been properly adjusted, press the STOP switch to halt the transport. 9. On the electronics modules, set the NORMAL/SET UP/BIAS switches to NORMAL. 10. Re-cue the tape at the beginning and initiate the record mode by pressing the PLAY and RECORD switches simultaneously. 11. The record mode can be halted by any of the following methods: a. If it is desired to halt recording on all channels without stopping the transport, hold the RECORD switch and momentarily press the STOP switch. b. If it is desired to halt recording on a selected channel(s), place the corresponding READY/SAFE switch(es) in the SAFE position. c. If it is desired to halt the transport, press the STOP switch. MAKING A RECORDING -WITH SEL SYNC To make a recording using the Sel-Sync Feature, proceed as follows (Sel-Sync operation is described later in this section). 18 d I 1. If necessary, clean and demagnetize the tape path as described . in the Maintenance section. 2. To apply power to the system, open the cabinet front doors, and place the POWER switch (in the upper right corner) to ON. 3. If not previously done, calibrate the reproduce amplifier levels as described in the Maintenance section. 4. Thread the master tape onto the transport as shown in Figure 9 and close the head gate. 5. On the system control box: a. Set the TAPE SPEED switch to the desired recording speed. b. , c. d. Set the INPUT MON/NORM MON switch to NORM MON. Set the SEL SYNC/REPRO switch to SEL SYNC. Set the READY/SAFE switches of the channel(s) to be recorded to. the READY position; all others to SAFE. 6. Connect monitoring facilities (headphones or loudspeaker) to the outputs of the channel(s) to be monitored. Refer to Table 1 for output specifications. 7. Open the front cabinet doors and set the NORMAL/SET UP/BIAS switches of the channel(s) to be recorded to the SET UP position. 8. With the audio sources connected to the appropriate channel inputs, perfom a test or rehearsal run by sirrioltaneously pressing the PLAY and _ ;B!:CORD switches. During this test run, adjust the appropriate individual RECORi:5 -level controls (on . -, the electronics assemblies) to obtain audio peaks of O vu on the corresponding vu . meters. 9. When each of the RECORD level controls has been properly adjusted, press the STOP switch to halt the transport. 10. On the electronics assemblies, set the NORMAL/SET UP/BIAS switches to NORMAL. 11. Re-cue the tape at the beginning of the master tape and initiate the recording mode by simultaneously pressing the PLAY and RECORD switches. In this mode, the audio reproduced is in exact sync with that being recorded. 19 12. The record mode can be halted by any of the following methods: a. If it is desired to halt recording on all channels without stopping the tranport, hold the RECORD switch and momentarily press the STOP switch; b. If it is desired to halt recording on a selected channei(s), place the corresponding READY /SAFE switch(es) in the SAFE position. c. If it is desired, to halt the transport, press the STOP switch. :,_ REPRODUCING A PREVIOUSLY RECORDED TAPE . i Repr,oduce tape as fol lows: 1. If necessary, clean and demagnetize the tape path as described in the Maintenance sectiotl:- 2. To apply power to the system, open the cabinet front doors and place .the POWER switch (in the upper right corner) to the ON position. 3. Thread the tape to be reproduced onto the transport as shown in Figure 9, and close the head gate. 4. On the system control box: a. Set the TAPE SPEED switch to the required tape speed. b. Set the INPUT MON/NORM MON switch to NORM MON. c. Set the SEL SYNC/REPRO switch to REPRO. d. Set all READY/SAFE switches to SAFE. e. Press the PLAY switch. 5. Adjust the appropriate REPRO level controls (on the electronics assemblies) to obtain the desired audio level. 6. Press the STOP switch to terminate the reproduce operation. If the tape supply is exhausted before the operator halts operation, the transport will automatically halt. 20 FAST WINDING For tape editing or cueing, the tape is rapidly wound by pressing the REWIND or FAST FORWARD switch. The switches can be pressed alternately without first stopping tape motion . . When the desired point on the tape is reached, press the STOP switch to halt the tape. If the tape runs off either reel, the transport will automatically stop. The REWIND and FAST FORWARD -switches can be pressed wh