Enable the service menu
Before performing the adjustment procedure, enable the Service menu as follows
(read through all the steps one time to understand the procedure):
1. Power on the oscilloscope.
2. Push and hold the front-panel Utility button for five seconds.
3. While continuing to hold the Utility button, push and hold the front-panel
Function button for five seconds.
4. While continuing to hold the Utility and Function buttons, push and hold the
front-panel Measure button for about three seconds, or until a message
appears in the lower left corner of the screen showing "Service mode ON."
5. Release all the buttons being pushed.
6. Push the front-panel Utility button.
7. Push the More option button until the menu lists a Service option.
8. Push the Service option button to display the service menu.
At completion of the Adjustment procedure, disable the "Service" menu by
selecting the Utility front panel button, the Service option button, and the
Service Mode Off option button.
Figure 1: DC voltage setup 1
Adjustments
TBS1000C Series Oscilloscope Service Manual 9
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