Troubleshooting
TDS 340A, TDS 360 & TDS 380 Technical Reference
6–35
8. Press the side menu button Display Log to display the diagnostics error log.
The error log contains summary data gathered over the life of the oscillo-
scope and descriptions of the last 200 errors encountered (see Figure 6–20).
The last error in the list is the most recent and/or most important; record this
information and continue on to the Troubleshooting Procedure in the next
section to verify the failure and pinpoint the faulty module.
Figure 6–20: The error log
Enabling Calibration Menus
The Voltage, Timing, and External Trigger calibration menus are disabled at the
factory. To enable the calibration menus, perform the following steps.
1. Remove the Line Cord as described on page 6–8.
2. Remove the Rear Cover and Cabinet as described on page 6–11.
3. Set the oscilloscope so its top side is down on the work surface and its front
is facing you.
4. Remove cal jumper J609 from the main board (see Figure 6–21). Save the
jumper. Reinstall the jumper after calibration to protect the calibration
settings.
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