Ampex-MM1100-tape-sm1维修电路原理图.pdf

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1、AMPEX 4880321 . II I -j -opation . end maintenanca RadioFans.CN 收音机爱 好者资料库MM-ll00 Catalog No. 4890321-05 Issued: September 1975 MULTICHANNEL RECORDER/REPRODUCER OPERATION AND MAINTENANCE THIS PACKAGE CONTAINS ALL PAGES Requires Binder No. 4890321 To assemble a complete manual, proceed as follows: 1.

2、 Remove all pages from loose-leaf binder. 2. I nsert the puges contained in th is package. 3. Discard th is instruction sheet. . AMPEX CORPORATION AUDIOVIDEO SYSTEMS DIVISION . , RadioFans.CN 收音机爱 好者资料库MMll00 Catalog No. 489032105 Issued: September 1975 MULTICHANNEL RECORDER/REPRODUCER OPERATION AND

3、 MAINTENANCE AMPEX CORPORATION AUDIO-VIDEO SYSTEMS DIVISION LIST OF EFFECTIVE PAGES CATALOG NO. 489032105 Issued: September 1975 Pages Dash No. Pages Dash No. Title -05 6-59/60 -05 A. -05 6-61 thru 6-71/72 -05 i thru iv -05 6-73 thru 6-75/76 -05 1-0 thru 1-9/10 -05 6-77/78 -05 2-1 thru 2-2 -05 6-79

4、th ru 6-81/82 -05 3-1 thru 3-7/8 . -05 6-83/84 -05 4-1 thru 4-3/4 . -05 6-85 th ru 87/88 . -05 4-5/6 -05 6-89/90 -05 4-7 thru 4-13/14 . -05 6-91 thru 6-93/94 -05 4-15 thru 4-19/20 -05 6-95/96 -05 4-21/22 -05 6-97/98 -05 4-23 thru 4-25126 -05 6-99/100 . -05 4-27 thru 4-35/36 -05 6-101 thru 6-103/104

5、. -05 4-37/38 -05 6-105 thru 107/108 -05 5-1 thru 5-27/28 . -05 6-1 09 th ru 6-111 /11 2 . -05 6-i thru 6-vi . -05 6-113/114 -05 ) 6-1 thru 6-5/6 . -05 6-115/116 -05 6-7 thru 6-9/10 -05 6-117 thru 6-119/120 . -05 6-11/12 -05 6-121/122 -05 6-13 thru 6-23/24 -05 6-123/124 -05 6-25/26 -05 6-125 thru 6-

6、127/128 . -05 6-27 thru 6-31/32 -05 6-129/130 -05 6-33 th ru 6-41/42 -05 6-131/132 -05 6-43/44 -05 6-133/134 -05 6-45 th ru 6-47/48 -05 6-135/136 -05 6-49/50 . -05 6-137 thru 6-141/142 . -05 6-51 thru 6-53/54 -05 6-143 thru 6-145/146 . -05 6-55 thru 657/58 -05 6-147 thru 6-158 -05 Prepared By AVSD T

7、ECHNICAL PUBLICATIONS AMPEX CORPORATION 401 Broadway Redwood City, California 94063 ) A PRINTED IN USA ) AMPEX 4890321-05 INTRODUCTION This manual, Catalog No. 4890321-05, provides operation and maintenance instructions for the Ampex Model MM-1100 Multichannel Tape Recorder/Reproducer, Ampex Part No

8、. 4010210 versions -13 through -24. This manual supersedes earlier versions of the manual. TABLE OF CONTENTS SECTION NO . . TITLE PAGE NO. 1 DESCRIPTION 1-1 GENERAL. 1-1 TAPE TRANSPORT ASSEMBLY 1-2 Supply and Takeup Reel Assemblies 1-2 Capstan Drive Assembly . 1-2 Capstan Pinch Roller 1-3 Tension Se

9、nsor Assembly 1-3 End-of-Tape Arm 1-3 Tape Lifter Assembly. 1-3 Tape Timer Assembly . 1-3 TRANSPORT CONTROL ASSEMBLY 1-3 MOTOR DRIVE AMPLIFIER ASSEMBLY 1-3 HEAD ASSEMBLY. 1-3 ) ELECTRONICS ASSEMBLY. 1-4 CONTROL BOX ASSEMBLY 1-4 METER PANEL ASSEMBLY. 1-5 POWER SUPPLIES. 1-5 ACCESSORIES 1-5 SPECIFICAT

10、IONS 1-5 2 INSTALLATION 2-1 EQUIPMENT SITING. 2-1 UNPACKING 2-1 POWER REQUIREMENTS. 2-1 CABLE CONNECTIONS 2-1 3 OPERATION 3-1 CONTROLS AND INDICATORS 3-1 OPERATING PROCEDURES. 3-4 Making a Recording -Without Sel Sync 3-4 Making a Recording -With Sel Sync 3-5 Reproducing a Previously Recorded Tape 3-

11、6 Fast Winding 3-7 4 THEORY OF OPERATION 4-1 AUDIO ELECTRONICS. 4-1 Recording 4-1 Reproducing Without Sel Sync 4-7 ) ii AMPEX 4890321-05 TABLE OF CONTENTS (Continued SECTION NO. TITLE PAGE NO. 4 THEORY OF OPERATION (Continued) Reproducing with Sel Sync. 4-7 Metering Circuitry 4-7 Bias/Erase Amplifie

12、r 4-9 Record Amplifier 4-9 Reproduce Amplifier 4-10 TRANSPORT CONTROL 4-11 End-of-Tape/Stop Logic 4-11 Fast-Forward Logic. 4-12 Rewind Logic . 4-12 Play Logic 4-17 Record Logic 4-17 ) Drive-to-Stop Logic. 4-18 Tape-Lifter Logic 4-23 Tape-Tension Circuitry 4-24 Motor Drive Amplifiers 4-28 CAPSTAN SER

13、VO . 4-29 Block-Diagram Description. 4-29 Circuit Description . 4-30 POWER SUPPLIES. 4-33 39-Vdc Power Supply and Regulator. 4-33 24-Vdc Power Supply and 15127-Vdc Regulators 4-34 Bias/Erase Oscillator 4-34 5 MAINTENANCE. 5- TEST EQUIPMENT 5-1 CLEANING. 5-1 DEMAGNETIZATION 5-2 LUBRICATION 5-3 CAPSTA

14、N SERVO. 5-3 Speed Pair Selection 5-3 Variable Speed Tape Mode. 5-3 Servo Gain Adjustment 5-3 TRANSPORT CONTROL 5-4 Preliminary Procedure 5-4 Normalizing Reel Servos. 5-4 Tension Adjustments 5-4 15/27-VOLT AND 39-VOLT POWER SUPPLIES 5-9 Voltage Adjustment 5-9 AMPEX 4890321-05 iii SECTION NO. 5 6 iv

15、TABLE OF CONTENTS Continued) TITLE MAINTENANCE (Continued) Overcurrent-Protection Adjustment CONTROL BOX. . . . . . . . Bulb Removal. . . . . . . . . . . . . Remote Control and Transport-Only Control MDA ASSEMBLY . . . . . METER PANEL ASSEMBLY. HEAD ASSEMBLY. . . . . TAPE LIFTER ADJUSTMENT BRAKE ADJ

16、USTMENT. Takeup Reel Brakes Supply Reel Brakes. . . . CAPSTAN IDLER . . . . DASH POT ADJUSTMENT AUDIO ALIGNMENT PROCEDURES 7.5-15 In/s Reproduce Alignment 7.5-15 I n/s Record Alignment 15-30 In/s Reproduce Alignment 15-30 In/s Record Alignment . Overall Noise and Distortion Measurements Bias/Erase A

17、mplifier PWA Alignment for 8-or 16-Channel Systems. Bias/Erase Amplifier PWA Adjustment for 24-Channel Systems PARTS LISTS AND SCHEMATIC DIAGRAMS INDENTURED LIST OF ASSEMBLIES NUMERICAL LIST OF ASSEMBLIES NUMERICAL LIST OF SCHEMATICS. PAGE NO. 5-9 5-10 5-10 5-10 5-10 5-10 5-12 5-12 5-12 5-12 5-13 5-

18、14 ) 5-15 5-15 5-16 5-18 5-20 5-21 5-23 5-25 5-26 6-i 6-ii 6-iv 6-vi ) AMPEX 4890321-05 ) :; :; :; :; :; :; =a :; :; ,. MM-1100 Multichannel Recorder/Reproducer ) AMPEX 4890321-05 1-0 ) SECTIO N 1 DESCRIPTION GENERAL This manual contains operation and mainte-nance instructions for the Ampex model MM

19、-1100 Multichannel Tape Recorderl Reproducer, Ampex Part No. 4010210, versions -13 through -24. The standard model is avail-able in 8, 16, or 24 channels, with operating speed pairs of 7.5-15 inls or 15-30 inls and operating in either the NAB or I EC (CCI R) standard. These configurations are summar

20、ized in Table 1-1. The M M-11 00 records on reels up to 16 inches in diameter and uses one-inch-wide tape on the 8-channel version and two-inch-wide tape on the 16- and 24-channel versions. Any machine can later be converted to an alternate configuration (for example, 16 to 24 channels) by installin

21、g a conversion kit. Table 1-1. MM-1100 Configurations AMPEX PART NO. CHANNELS TAPE SPEED STANDARD 4010210 PAIRS -13 8 15-30 NAB -14 16 15-30 NAB -15 24 15-30 NAB -16 8 15-30 IEC (CCIR) -17 16 15-30 IEC (CCIR) -18 24 15-30 IEC (CCIR) -19 8 7.5-15 NAB -20 16 7.5-15 NAB -21 24 7.5-15 NAB -22 8 7.5-15 I

22、EC (CCIR) -23 16 7.5-15 IEC (CCIR) -24 24 7.5-15 IEC (CCIR) AMPEX 4890321-05 1-1 The MM-11 00 provides the capability of recording on one or more channels simultaneously or of monitoring a previously recorded channel while recording in synchronization on one channel or more. The selective synchroniz

23、ation (SE L SYNC*) feature is enabled by using the record head(s) of the prerecorded channel for playback. The MM-1100 Recorder/Reproducer consists of a tape transport assembly; a transport control assem-bly; a frame assembly; a motor drive amplifier assembly; a head assembly; four electronics assem

24、-blies (for 16-channel systems); a control box assembly; a meter panel assembly; two power supplies; a fan assembly; an input/output connec-tor panel assembly; an input/output adapter panel assembly; and a circuit breaker assembly. Connectors are used extensively between units to allow easy removal

25、of components and assemblies. TAPE TRANSPORT ASSEMBLY The tape transport assembly, Figure 1-1, consists of supply and takeup reel assemblies; a capstan drive assembly; a capstan pinch roller assembly; a tension sensor assembly; an end-of-tape arm and housing assembly; a tape lifter assembly; and a t

26、ape timer assembly. Also mounted on the tape trans-port, but not considered part of the tape transport, are the erase, record, and reproduce heads compris-ing the head assembly. Supply and Takeup Reel Assemblies The supply and takeup reel assemblies each consist of a split-phase, four-pole, ac torqu

27、e motor and brake assembly. The motors drive the tape reel turntables. A motor sense assembly is mounted on the bottom of the supply reel drive motor and shares the turntable shaft. These reel assemblies can be removed through the top of the transport deck for servicing. Capstan Drive Assembly The c

28、apstan drive assembly consists of a dc servo-controlled motor and a tachometer wheel. The shaft of the motor is the capstan for the tape transport. The tachometer wheel assembly consists of a pickup coil and inner and outer tachometer (gear) wheels mounted on the motor shaft and housing. The use of

29、inner and outer tachometer wheels minimizes flutter introduced by tachometer irregu larities. 12530-18 Figure 1-1. Tape Transport Assembly Trademark. Ampex Corporation 1-2 AMPEX 4890321-05 Capstan Pinch Roller The capstan pinch roller consists of a solenoid-operated, shaft-mounted arm. The arm suppo

30、rts a rubber pinch roller fitted with ball bearings at each end of the pinch roller shaft. An adjustable pressure spring is used to maintain the necessary force of the pinch roller against the capstan. Tension Sensor Assembly The tension sensor assembly, located near the supply reel, consists of two

31、 selenium photovoltaic cells and an incandescent lamp mounted on a fixed bracket. The three active components are wired to a connector plug that interconnects with the transport harness. A moving window that is fixed to a tension arm in the tape path passes an amount of light proportional to the tap

32、e tension from the lamp to the photocells. End-of-Tape Arm The end-of-tape arm, located near the takeup reel, is contained in a housing and consists of a spring-loaded tension arm assembly fitted with a tape post at the free end. The shaft to which the tension arm is attached extends through the tra

33、nsport chassis to an arm which is mechanically coupled to a dash pot to dampen the return motion of the spring-loaded arm. The arm is also equipped with an actua-tor that trips a microswitch to signal that there is no tape pressure against the tension arm. A latch plate is also . attached to the arm

34、 for ease of tape threading. When the operator places the tension arm in a full counter-clockwise position, the arm is held in place by a magnetic latch. Also the latch plate actuates a tape-threading switch which removes power from . both reel motors. Tape Lifter Assembly The tape lifter assembly i

35、s a solenoid-operated, spring-return pivoted assembly. The tape lifter pins extend up through the head assembly mounting block and are moved forward of the head assembly when the solenoid is actuated. Unless defeated by the operator, the tape lifters function during the fast forward and rewind modes

36、. AMPEX 4890321-05 Tape Timer Assembly The tape timer assembly consists of a tape-driven idler assembly attached to a mounting boss. The timer idler drives a gear train arrangement which, in turn, drives a mechanical time counter. The counter indicates tape travel time in hours, miniJtes,and seconds

37、 when the tape speed is 15 in/so At a tape speed of 30 in/s, the indicated time must be divided by two to obtain actual playing time. For 7.5 in/s operation, the indicated time must be multiplied by two to obtain actual playing time. TRANSPORT CONTROL ASSEMBLY The transport control assembly is an en

38、closed chassis with a hinged lift-up cover, which contains two separate printed circuit board assemblies and an extender board. The transport control board and the capstan servo board plug into 56-pin connection receptacles J 1 and J2, respectively. The extender board is stored in a spare receptacle

39、 (J3). The board receptacles are hard-wired to a connec-tor cable harness that interconnects with the transport assembly, the electronics assemblies, the remote control connector on the input power panel, the local control box, and the capstan tachometer. The transport control assembly is mounted at

40、 the rear of the meter panel assembly adjacent to the local control box assembly. MOTOR DRIVE AMPLIFIER ASSEMBLY The motor drive amplifier (MDA) is a completely enclosed chassis that mounts on the right side of the rear panel. The MDA assembly contains a printed circuit board mounted on the chassis

41、with six heatsinks for power transistors. A chassis connector is provided for interconnection of power and control signals. Three separate MDAs are enclosed; two for the reel motors and one for the capstan motor. HEAD ASSEMBLY Eight-track, 16-track, and 24-track head assemblies are available for use

42、 with the MM-1100. The 1-3 eight-track head assembly uses one-inch wide recording tape, and the 16-and 24-track heads use two-inch tape. Each head assembly contains three head-stack assemblies: the erase head, the record head, and the reproduce head. The record and reproduce head stacks are magnetic

43、ally shielded with laminated mu-metal. A hinged head-shield cover is block-mounted in front of the record and reproduce heads. I n addition, a precision tape guide is mounted adjacent to the erase head at one end of the assembly and adjacent to the reproduce head at the other end. The record and rep

44、roduce heads are identical and provide Sel-Sync response comparable to that of conventional reproduce heads. Figure 1-2 shows a 16-track head assembly. ELECTRONICS ASSEMBLIES Each electronics assembly (Figure 1-3) contains four bias, record, and reproduce amplifier printed wiring assemblies (PWAs) a

45、nd four audio switching PWAs. Each audio switching PWA contains three 24-pin PWA receptacles. The bias/erase amplifier, record amplifier, and reproduce amplifier PWAs plug into the receptacles on the audio switching PWA. A 3D-pin connector connects each audio switching PWA to the rest of the electro

46、nics. Three potentiometers and a switch on each audio switch-ing PWA are mechanically coupled by shaft extenders to the front panel to provide switching and adjustment of Sel-Sync, reproduce, and record levels. Normally, the exposed shafts are recessed and can only be turned with a screwdriver. Howe

47、ver, if desired, the shafts can be extended and knobs can be installed on them. Each record and reproduce PWA contains a 1O-pin PWA receptacle for a plug-in equalization PWA. The equalization PWAs plug in at right angles to the record and reproduce PWAs so that their adjustment controls are accessib

48、le at the front panel of the electronics assembly. The rear panel contains all necessary input/output connectors. Each electronics assembly (4 channels) has a 2A slow-blow fuse mounted on the rear of the assembly. This fuse protects the 39-volt supply. A line-bridging transformer is factory-installe

49、d in each input accessory socket on the rear panel of the electronics assembly. CONTROL BOX ASSEMBLY The control box assembly is a removable assembly that doubles as a remote control unit. The control box contains the controls and indicators for all operating functions of the recorder/reproducer. Th

50、e SAFE/READY rocker switches are used to select desired channels for recording. Other control box assembly switches are: SEL SYNC/REPRO, INPUT MON/NORM MON, TAPE SPEED, LIFTER DEFEAT, RECORD, PLAY, REWIND, FAST FORWARD, and STOP. When the control 12530-41 Figure 1-2. 16-Track Head Assembly 1-4 AMPEX