User`s guide

6-22 User’s and Service Guide
Service
Troubleshooting and Block Diagram
Troubleshooting the Front Panel Board
Turn the instrument power on and check the following:
Step 1. Check the condition of each of the switching paths by issuing
commands to switch each of the paths to either the transmission or
reflection path. Ensure that the LCD indicates the appropriate path.
Step 2. If the LCD indicates a wrong path, the problem can lie either with the
front panel board or with the main switch board. Measure the RF path
to determine where the problem is.
Step 3. If the LCD does not display the proper path, check to see if the RF path
has indeed been switched. If the problem lies with the front panel
board, replace it
Troubleshooting the Controller and Switch Driver
Boards
Turn the instrument power on.
Step 1. Check the condition of each of the switching paths by issuing
commands to switch each of the paths to either the Transmission or
Reflection path.
Step 2. Check each of the RF paths for connection.
Step 3. If an RF path is not connected to the necessary port or terminated in
50 Ω, replace the controller and switch driver board.