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5
ADJUSTMENTS....................................................................................................................................5-1
5-1.
Introduction ..............................................................................................................................5-1
5-3.
Safety Considerations ..............................................................................................................5-1
5-5.
Recommended test equipment ...............................................................................................5-1
5-7.
Factory Selected Components ................................................................................................5-1
5-9.
Adjustment Procedures............................................................................................................5-2
5-11.
Reference Temperature Adjustments ......................................................................................5-2
5-14.
Preliminary Procedure..............................................................................................................5-2
5-17.
Laser Tube Current Adjustment ...............................................................................................5-4
6
REPLACEABLE PARTS ........................................................................................................................6-1
6-1.
Introduction ..............................................................................................................................6-1
6-4.
Exchange Assemblies..............................................................................................................6-1
6-6.
ABBREVIATIONS AND REFERENCE DESIGNATIONS ...........................................................6-1
6-8.
ORDERING INFORMATION .....................................................................................................6-1
6-11.
DIRECT MAIL ORDER SYSTEM...............................................................................................6-2
6-14.
Exploded View........................................................................................................................6-11
7
MANUAL CHANGES ............................................................................................................................7-1
7-1.
Introduction ..............................................................................................................................7-1
7-3.
Newer Instruments ...................................................................................................................7-1
8
SERVICE ..............................................................................................................................................8-1
8-1.
Introduction ..............................................................................................................................8-1
8-3.
Theory of Operation .................................................................................................................8-1
8-5.
Recommended Test Equipment ..............................................................................................8-1
8-7.
Service Aids..............................................................................................................................8-1
8-9.
Schematic Diagram Symbols and Reference Designations....................................................8-1
8-12.
Safety Considerations ..............................................................................................................8-3
8-14.
Safety Symbols ........................................................................................................................8-4
8-16.
Before and After Service Product Safety Checks ....................................................................8-5
8-18.
LASER HEAD BLOCK DIAGRAM DESCRIPTION ....................................................................8-5
8-26.
Laser Tuning ............................................................................................................................8-7
8-29.
Warmup Mode Tuning .............................................................................................................8-7
8-34.
Optical Mode Tuning................................................................................................................8-9
8-40.
Laser Assembly Optics ..........................................................................................................8-12
8-42.
Reference Receiver ................................................................................................................8-12
8-44.
Shutter Mechanism ................................................................................................................8-12
8-46.
8-47.
REAR PANEL LED INDICATORS ...........................................................................................8-12
8-52.
ASSEMBLY REMOVAL INSTRUCTIONS ...............................................................................8-14
8-62.
TROUBLE ISOLATION ...........................................................................................................8-19
8-63.
Quick Tuning Checkout Procedure .......................................................................................8-19
8-67.
Testing the Liquid Crystal Switch...........................................................................................8-21
8-70.
HP5501B Trouble Isolation Procedures.................................................................................8-23
8-72.
Procedure...............................................................................................................................8-24
8-73.
A1 CONNECTOR BOARD CIRCUIT THEORY........................................................................8-26
8-76.
High Voltage Power Supply Switch (A1Q3 and A1Q4)..........................................................8-26
8-79.
Power Distribution ..................................................................................................................8-26
8-83.
A1 CONNECTOR BOARD TROUBLESHOOTING..................................................................8-27
8-85.
Rear Panel LED Operational Check.......................................................................................8-27
8-87.
A2 HIGH VOLTAGE POWER SUPPLY CIRCUIT THEORY.....................................................8-29
8-89.
HIGH VOLTAGE POWER SUPPLY TROUBLESHOOTING ....................................................8-29
8-91.
8-92.
Introduction ............................................................................................................................8-32
8-95.
Clock Ⓐ..................................................................................................................................8-32
vi
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