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HP8904A Table of Contents
TABLE
OF
CONTENTS
Section
8
Service
Introduction To This Section
............................................
8-1
How The Section
Is
Organized
...........................................
8.1
Safety Considerations
................................................
8.1
Service Tools, Helps, and Information
.......................................
8.1
Schematic Symbology and Schematic Diagram Notes
..............................
8.3
Principles of Operation
..............................................
8-15
Overall
.....................................................
8-15
A2 Digital Assembly
..............................................
8-23
A3 Output Assembly
..............................................
8-24
Troubleshooting
..................................................
8-29
General
.....................................................
8-29
A2 Digital Assembly To A3
(or
A10) Output Assembly Interface
.....................
8-30
A2 Digital Assembly
To
A1 Keyboard Assembly Interface
.........................
8-38
A2 Digital Assembly
To
A5 Display Assembly Interface
..........................
8-41
A3
or
A10 Output Assembly
.........................................
8-42
Phase Synchronization (Option 005)
....................................
8-42.1
How To Restore the Serial Number In
a
Replacement A2 Digital Assembly
.................
8-43
How To Restore Options 001. 003. and
005
In A Replacement A2 Digital Assembly
.............
8-46
How To Replace the Memory Backup Battery
.................................
8-48.1
Service Sheet
1
(Output Assembly)
........................................
8-51
Service Sheet 2 (Output Assembly
........................................
8-53
Service Sheet
3
(Output Assembly)
........................................
8-53
Service Sheet 4 (Output Assembly)
........................................
8-55
Service Sheet 5 (High Power Output Assembly
.................................
8-57