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HYDRA
Service Manual
vi
5A-30. Failure to Illuminate the Battery Led .......................................... 5A-31
5A-31. Failure to Write to Memory Card................................................ 5A-32
5A-32. Write/Read Memory Card Test (Destructive)............................. 5A-32
6 List of Replaceable Parts .................................................................. 6-1
6-1. Introduction ........................................................................................ 6-3
6-2. How to Obtain Parts ............................................................................ 6-3
6-3. Manual Status Information .................................................................. 6-3
6-4. Newer Instruments .............................................................................. 6-4
6-5. Service Centers .................................................................................... 6-4
7 IEEE-488 Option -05........................................................................... 7-1
7-1. Introduction ........................................................................................ 7-3
7-2. Theory of Operation ............................................................................ 7-3
7-3. Functional Block Description ......................................................... 7-3
7-4. IEEE-488 PCA Detailed Circuit Description (2620A Only) .............. 7-3
7-5. Main PCA Connector ...................................................................... 7-4
7-6. IEEE-488 Controller ....................................................................... 7-4
7-7. IEEE-488 Transceivers/Connector ................................................. 7-5
7-8. General Maintenance ........................................................................... 7-5
7-9. Removing the IEEE-488 Option ..................................................... 7-5
7-10. Installing the IEEE-488 Option ...................................................... 7-7
7-11. Performance Testing ........................................................................... 7-7
7-12. Troubleshooting .................................................................................. 7-8
7-13. Power-Up Problems ........................................................................ 7-8
7-14. Communication Problems ............................................................... 7-8
7-15. Failure to Select IEEE-488 Option ............................................. 7-8
7-16. Failure to Handshake on IEEE-488 Bus ..................................... 7-8
7-17. Failure to Enter Remote .............................................................. 7-8
7-18. Failure to Receive Multiple Character Commands .................... 7-9
7-19. Failure to Transmit Query Responses ........................................ 7-9
7-20. Failure to Generate an End or Identify (EOI) ............................. 7-9
7-21. Failure to Generate a Service Request (SRQ) ............................ 7-9
7-22. List of Replaceable Parts ..................................................................... 7-9
7-23. Schematic Diagram ............................................................................. 7-9
8 Schematic Diagrams.......................................................................... 8-1
9 Hydra Starter Calibration Software................................................... 9-1
Introduction ....................................................................................................... 9-3