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1、AMPEX .4890301-03 AG-440 B / AG-445 B Recorder/Reproducer Operation and Maintenance Manual ISSUED: FEBRUARY 1969 CHANGED: AUGUST 1971 AO 01 I LIST OF PAGES PAGE CHANGE IN PAGE CHANGE IN PAGE CHANGE IN NUMBER EFFECT NUMBEA EFFECT NUMBEJ EFFECT Title 8/71 6-4B 8/71 A 8/71 6-4C 8/71 6-4D 8/71 i -xvi 1/
2、70 6-4E/F 8/71 6-5 8/71 Section 1 6-6 8/71 8 pages 6-7 8/71 6-8 8/71 Section 2 6-10 8/71 8 pages 6-11 8/71 6-12 8/71 2-5/6 1/70 6-13 1/70 2-7/8 1/70 6-14 8/71 6-15 8/71 Section 3 6-16 8/71 6 pages 6-17 8/71 6-18 8/71 Section 4 6-19 8/71 54 pages 6-20 8/71 6-21 8/71 4A-1 8/71 6-22 1/70 4B-5 1/70 6-23
3、 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 16-27 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-ll 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
4、8/71 Section f 6-38 8/71 9 pages 6-?9 8/71 6-40 8/71 Section ( 6-41 8/71 45 pages Section 6-1 8/71 16 pages 6-2 8/71 6-3 8/71 7B-1 8/71 6-4 8/71 7B-2 8/71 6-4A 8/71 7B-3 8/71 NOTE: For listing of separable components and accessories, see pages 6-2, 6 . 3, 6-4, and 1-5. A PAGE CHANGE IN NUMBEJ EFFECT
5、 ISSUE: August 1971 4890301 A002 AG-440 Series Recorder/Reproducer (Frontispiece) AMPEX i 4890301 COMMUNICATING WITH AMPEX SERVICE INFORMATION AND PARTS FIELD ENGINEERING BULLETIN SERVICE (See note below) Ampex provides a continuous technical support program for its products. This program is partial
6、ly implemented through field engineering bulletins, which are published by the Ampex Technical Support Group. Approved modifications, information on special tools and acces- sories, and improved operating and maintenance techniques are typical of the information distributed in these bulletins. If th
7、e installation of your system or accessory was supervised by an Ampex Field engineer, you will be sent these bulletins automatically. If this is not the case, contact the nearest Ampex field office or write to: Ampex Corporation Audio Technical Support Group 401 Broadway Redwood City, California 940
8、63 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 offi
9、ce. Alternatively, write to the Technical Support Group at the address shown above. NOTE In order for the technical support program to function properly, the user must ensure that his communication is addressed to the proper depart- ment, and that it includes the following informa- tion, most of whi
10、ch can be obtained from the system identification nameplate on the equipment. 1. System name 2. Model number (including revision number) 3. System number 4. Serial number 5. Power requirements 6. System modifications and special accessories 7. Date of purchase 8. Name and address of your organizatio
11、n 9. Job function to which communication should be addressed 10. Physical location of equipment u AMPEX 4890301 COMMUNICATING WITH AMPEX INSTRUCTION MANUAL CHANGES Another part of the Ampex program of technical support for its products is the continuous revision and modification of instruction manua
12、ls as the equipment is improved or modified. In order to ensure that you always receive this information, write to: Ampex 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
13、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 6. Approximate date of purchase 7. Name and address of your organization
14、 8. Job function to which communication should be addressed AMPEX iii 4890301 SAFETY quipment. Mounting Units . . . . . Console Front Panel Removal . Interconnecting Units . Connecting Signal Lines . . . Connectors . . . . . Signal Input Connections. Signal Output Connections . Restrapping Output .
15、. . Connecting Power . . . . Installing Accessories or Dummy Plugs Input Transformer or Microphone Preamplifier Remote Control Unit . Console Rear Covers . Scrape-Flutter Idler . . . Checking Cables and Components Initial Lubrication . . . OPERA TING INSTRUCTIONS Operating Controls and Indicators Ta
16、pe Transport . . . . . Record/Reproduce Electronic Unit . Reproduce Electronic Module Pre-Operating Procedures Applying Power . . . . Selecting Tape Speed . Selecting Reel Hub Size . Threading Tape . Monitoring Facilities . Recording . Without Sel-Sync* With Sel-Sync*. Reproducing. Fast-Winding . .
17、* Registered, Ampex Corporation JAN. 1970 AMPEX 4890301 Page 1-1 1-1 1-2 1-2 1-4 . . . . 1-4 1-4 2-1 2-1 2-1 2-2 2-2 2-2 2-2 2-2 2-2 2-2 2-4 2-4 2-4 2-4 2-4 2-4 . . . . 2-4 2-5 2-5 2-5 3-1 3-1 3-2 3-2 3-4 3-4 3-4 3-4 . . . . 3-4 3-4 3-4 3-4 3-4 3-5 3-5 V 4890301 3.6 Section 4. 4.1 4.2 vi 4A.1 4A.2 4
18、A.2.1 4A.2.2 4A.2.3 4A.2.4 4A.3 4A.4 4A.4.l 4A.4. 2 4A.4.3 4A.5 4A.6 4B.1 4B.1.1 4B.1.2 4B.1. 3 4B.2 4B.3 4B. 3.1 4B.3.2 4B.3.3 4B.3.4 4B.4 4B.4.1 4B.4.2 4B.4.3 4B.4.4 4B.4.5 4B. 4.6 4B.4.7 4C.1 4C.2 4C.2.1 4C.2.2 4C.2.3 4C.2.4 4C.2.5 4C.2.6 Editing . MAINTENANCE Introduction Contents . PART A. CONV
19、ERSION Turntable Repositioning Tape-Width Conversion General . Rotating Tape Guides. Changing Heads . . . Changing Head Cable Box . Scrape-Flutter Idler Addition. Channel Addition . . . . General. . . Record/Reproduce Unit Installation Reproduce Module Installation. Console Rear Cover Installation .
20、 Record and Reproduce Conversion . PART B. PREVENTIVE MAINTENANCE Eighth-Hour Cleaning . . . Heads . . Tape Guide Elements. Scrape-Flutter Idler . Eighth-Hour Demagnetizing Lubricating . . . . . . . General . . Drive Motor Initial Lubrication . Motor/Idler Three-Month Lubrication Idler Yearly Lubric
21、ation Performance Checkouts General. . Test Equipment . Test Conditions . Frequency Response Checkout. Overall Signal-to-Noise Check Overall Distortion Check . Flutter Check . . . . . . PART C. ADJUSTMENT AND ALIGNMENT General . Tape Transport Adjustments . Test Equipment . . . Different Tape Sizes
22、. Tape Tension Brakes Capstan Idler Tape Lifter AMPEX 3-6 4-1 4-1 4A-1 4A-1 4A-1 4A-1 4A-2 4A-2 4A-2 4A-3 4A-3 4A-3 4A-4 4A-4 4A-4 4B-1 4B-1 4B-1 4B-1 4B-1 4B-2 4B-2 4B-2 4B-2 4B-3 4B-3 4B-3 4B-3 4B-4 4B-4 4B-6 4B-7 4B-7 4C-1 4C-1 4C-1 4C-1 4C-l 4C-.3 4C-5 4C-5 JAN. 1970 4C.3 4C.3.1 4C.3.2 4C.3.3 4C
23、.3.4 4C.3.5 4C.3.6 4C.3.7 4C.3.8 4C.3.9 4C.3.10 4C.4 4C.4.1 4C.4.2 4C.4.3 4C.4.4 4D.1 4D.2 4D.2.1 4D.2.2 4D.2.3 4D.3 4D.4 4D.4.1 4D.4.2 4D.5 4E.1 4E.2 4E.2. l 4E. 2. 2 4E.2.3 4E. 2.4 4E.3 4E.3.l 4E.3.2 4E.3.3 4E.4 4E.4.1 4E.4.2 4E.4.3 4E.4.4 4E.4.5 4E.4.6 4E.4.7 4E.4.8 4E.4.9 Electronic Alignment. .
24、 . Standard Test Tapes Test Equipment . . Test Conditions . . Alignment Procedures Introduction . Power Supply . . . . . . . Reproduce-Head Azimuth . Reproduce/Record Alignment Record-Head Azimuth. . . . Low-Frequency Reproduce Equalization. Record Equalization Sel-Sync* Adjustments . Test Equipment
25、 . . Test Conditions . . Sel-Sync* Level Adjustment . Sel-Sync* Bias Trap Adjustment . PART D. HEAD MAINTENANCE General . . Adjusting Head Height . . . . Record/Reproduce Heads Quarter-Track Record/Reproduce Heads Erase Heads . . . . . . . Adjusting Tape Wrap and Zenith . Changing Head Stacks . . .
26、. . 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
27、 Takeup and Rewind Assemblies General . . Replacing Takeup or Rewind Assembly Reel Drive Plate Replacement . Turntable Pad Replacement Brake Assembly Removal Brake Band Replacement Brake Solenoids Replacement Brake Installation and Adjustment Motor Capacitor Replacement . * Registered, Ampex Corpora
28、tion JAN. 1970 AMPEX 4890301 4C-6 4C-6 4C-6 4C-7 4C-7 4C-7 4C-7 4C-8 4C-10 4C-11 4C-11 4C-12 4C-12 4C-12 4C-12 4C-13 4D-1 4D-1 4D-1 4D-2 4D-2 4D-2 4D-2 4D-2 4D-3 4D-3 4E-1 4E-1 4E-1 4E-1 4E-1 4E-2 4E-2 4E-2 4E-2 4E-2 4E-2 4E-2 4E-2 4E-3 4E-3 4E-3 4E-3 4E-3 4E-4 4E-4 vii 4890301 4E.5 4E.5.1 4E.5.2 4E
29、.5.3 4E.5.4 4E.6 4E.6.l 4E.6.2 4E.6.3 4E.6.4 4E.6.5 4E.6.6 4E.7 4E.7.1 4E. 7. 2 4E. 7.3 4E.7.4 4E.7.5 4E.8 4E.8.l 4E.8.2 4E.8.3 4E.8.4 4E.8.5 4E.9 4E.9.l 4E.9.2 4E.9.3 4E.10 4E.ll 4E. ll.1 4E.11.2 4E.11. 3 4E. ll.4 4E.11.5 4E.11. 6 4E.11. 7 4E. ll.8 4E.ll.9 4E.11.10 4E.11.11 4E. ll.12 Drive Motor. .
30、 . . . . . . . . . . Lubrication . . . . . . . . . Fan and Flywheel Replacement. Drive Motor Replacement . . Motor Capacitor Replacement Reel Idler . . Tape Guide Replacement Pulley Replacement . Idler Tension Adjustment Arm Assembly Replacement. Reel Idler Replacement . . Ball Bearing Replacement .
31、 Takeup Tension Arm . . . . . Arm Spring Adjustment . . Safety Switch Adjustment . Tape Guide and Hook Replacement Tension Spring Replacement . Takeup Tension Arm Replacement Capstan Idler . . . . . . . . . Lubrication and Adjustment Parts Not Removable . Idler Positioning . . . . . Idler Replacemen
32、t . . . . 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 .
33、Solenoid Actuation Check Drive Motor Check . Takeup Motor Check . . Rewind Motor Check . . Power Lamp Replacement . Switch Replacement . Record Circuit Check. . . PART F. ELECTRONIC CORRECTIVE MAINTENANCE 4F. 1 General . . . . . . . . . . . 4F. 2 Extender Boards Use. . . . . . 4F. 3 Input Power and
34、Indicators Check 4F.3.l Recorder/Reproducer. 4F . 3. 2 Reproducer ( only) 4F. 4 Record Relay Check 4F. 5 Power Supply Check 4F. 6 Bias Check vm AMPEX 4E-5 4E-5 4E-5 4E-5 4E-5 4E-5 4E-5 4E-5 4E-6 4E-6 4E-6 4E-6 4E-7 4E-7 4E-7 4E-7 4E-7 4E-7 4E-8 4E-8 4E-8 4E-8 4E-8 4E-8 4E-9 4E-9 4E-9 4E-10 4E-10 4E-
35、10 4E-10 4E-10 4E-ll 4E-11 4E-12 4E-12 4E-15 4E-15 4E-16 4E-17 4E-17 4E-17 4F-l 4F-1 4F-1 4F-1 4F-2 4F-2 4F-3 4F-3 JAN. 1970 4F.7 4F.7.1 4F.7.2 4F. 7.3 4F.8 4F.9 4F.9.1 4F.9.2 4F.9.3 4F.10 Section 5. 5.1 5.1.1 5.1. 2 5.1.3 5.1.4 5.1.5 5.1. 6 5.1.7 5.1.8 5.2 5.2.1 5.2.2 5.2.3 5.2.4 5.2.5 Section 6. 6
36、.1 Section 7. 7A.1 7A.2 7A.2.1 7A.2.2 7A.2.3 7B.l 7B.2 7B.3 7B.4 7C.1 Record/Reproduce Check. General . Record Check . . Reproduce Check. Reproduce Check . . . Parts Replacement . . Indicator Lamps . Circuit Board Components Other Components Response Curve Check THEORY OF OPERATION Tape Transport .
37、. . . . . . . . . General . . Tape Supply and Takeup Systems. Tape Drive System . . Reel Idler . . Takeup Tension Arm . Tape Lifter . . . . Control Circuit . . Tape Scrape-Flutter Electronic Circuits . . . Power Supply . . . Bias Oscillator and Amplifier Circuits . Record Amplifier Circuit . . Repro
38、duce 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 Di
39、rectly from the Record Mode Modification to Defeat all, or any, of the Edit Functions . . . . . Modification to Enter the PLAY /EDIT Mode by pressing the EDIT Pushbutton (when Tape is Stopped) Even When the Safety Switch is Open . . PART B. EXTERNAL MOTOR DRIVE AMPLIFIER ADDITION General . . Interna
40、l Wiring . . . . . . . . . Connecting Motor Drive Amplifier. Preparing Dummy Plug . . . . . PART C . SEL-SYNC* REMOTE CONTROL Description. . . . * Registered, Ampex Corporation JAN. 1970 AMPEX 4890301 4F-4 4F-4 4F-4 4F-4 4F-4 4F-5 4F-5 4F-5 4F-5 4F-5 5-1 5-1 5-1 5-2 5-2 5-2 5-3 5-3 5-6 5-6 5-6 5-7 5
41、-7 5-8 5-9 6-1 7A-1 7A-1 7A-1 7A-1 7A-2 7B-1 7B-1 7B-2 7B-2 7C-1 ix 4890301 X 7C.2 7C.2.1 7C. 2. 2 7C.2.3 7C.3 7C.3.l 7C.3.2 7C.3.3 7C.4 7C.4.l 7C. 4. 2 7C.4.3 7C.4.4 7C.5 7C. 5.1 7C.5.2 7C.5.3 Switching Unit. General. Mounting . Connecting Control Unit . General . Mounting . Connecting Remote Opera
42、tion . . Recording Reproducing . Fast-Winding Edit Mode Adjustments . General . Sel-Sync* Level Adjustment. Sel-Sync* Bias Trap Adjustment. AMPEX 7C-1 7C-1 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 4890301 LIST OF I
43、LLUSTRATIONS Figure TITLE Page Frontispiece Ampex Model AG-440B Recorder/Reproducer. i 1-1 Tape Transport . . 1-2 1-2 Record/Reproduce Unit 1-2 1-3 Printed Circuit Boards 1-4 1-4 Reproduce Electronic Module . 1-4 2-1 Mounting Dimensions 2-2 2-2 Front Panel Mounting Details . 2-2 2-3 Tape Transport C
44、onnector Panel. 2-3 2-4 Record/Reproduce Unit (Rear) 2-3 2-5 Record and Reproduce Modules 2-5 3-1 Controls and Indicators. . 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 Sup
45、ports 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 Power Supply Box Interior 4C-7 4C-6 Head Azimuth Adjustments . 4C-
46、8 4D-1 Head Height and Zenith Adjustments . 4D-2 4F-1 Record Response Check Setup . 4F-6 4F-2 Reproduce Response Check Setup 4F-6 5-1 Tape Transport 5-2 5-2 Block Diagram 5-6 JAN. 1970 AMPEX xi 4890301 Figure 5-3 6-1 6-2 6-3 6-4 6-5 6-6 6-7 6-8 6-9 6-10 6-11 6-12 6-13 6-14 6-15 6-16 6-17 6-18 6-19 6
47、-20 6-21 6-22 6-23 6-24A 6-24B 6-25 6-26 6-27 6-28 xii LIST OF ILLUSTRATIONS (Continued) TITLE Strapping Circuit, Simplified. Head Assembly, Record/Reproduce, 1/4-inch Tape Head Assembly, Reproduce-only, 1/ 4-inch Tape . . Head Assembly, Record/Reproduce, 1/2-inch Tape Head Assembly, Reproduce-only,
48、 1/2-inch Tape . Head Connector Assembly Head Cable Box Assembly Scrape-Flutter Idler Assembly . Tape Transport Assembly, Front. Tape Transport 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 1 input impedance) Console Rear Cover Electronics Assem
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