Removal and Installation Procedures
Circuit Boards
This procedure describes how to remove these circuit boards:
A6 CPU Board
A2 AWG Board
A11 D/A Board
A1 Clock Board
For Option 02: A2 AWG Board and A11 D/A Board
For Option 04: A25 Digital Data Out Board
For Option 05: A31 Clock Sweep Board
For Option 09: A7 Floating Point Processor Board
1.Assemble equipment and locate modules to be removed: No tools are needed; however, the maintenance kit includes an ejector that is useful in removing circuit boards from the chassis. Locate the modules to be removed in the locator diagram, Internal Modules, in Figure 6:4.
2.Remove the rear shield cover: Do the procedure, Rear Shield Cover, on page 6:35.
3.Orient instrument: Set the AWG2005 with the left side down on the work surface and the bottom facing you.
4.Remove board support: Remove the board support upward while push: ing its hook to the inside.
5.Remove A6 CPU board: This circuit board is installed in the second slot from the top.
CAUTION
To avoid permanent loss of waveform files, note the following: A lithium battery which maintains the nonvolatile memory during power+off time is located on the A5 Backplane board. The nonvola+ tile memory that contains the waveforms and their setup parameter data is located on the A6 CPU board. Removing either board will cause the waveform files, sequence files, and autostep files in nonvolatile memory to be permanently lost. Before removing either the A6 CPU board or the A5 Backplane board, save the waveform files, sequence files, and autostep files in the instrument nonvolatile memory to a floppy disk. Then, after reinstalling the board(s), reload the files into nonvolatile memory.
a.Disconnect the ribbon interconnect cable at J50 and J64 on the A69CPU board (see Figure 6:21).
WG Service Manual | 645 |