Maintenance
4-14
TDS3000C Series S ervice Manual
2. Install the communication module guide into the chassis. Make sure that the
four pins on the module guide align with the four holes on the main board.
Gently lift the rear chassis and insert the small tab in the chassis slot.
3. Install the feet into the front case if you removed them in a previous step.
4. Place the rear case over the oscilloscope chassis and lower it. The rear case
should fit over and capture the feet.
5. Press the rear case downward so that it is seated completely.
6. Install the T-15 screw above the power connector.
NOTE. The screw installed above the power connector is 0.25 inches long. Make
sure you use the correct-length screw when attaching the rear cabinet to the rear
chassis.
7. Install the communication module cover or a communication module.
You will need a TORX T-15 screwdriver to remove the rear chassis.
NOTE. You must remove the handle assembly and the rear case before you can
remove the rear chassis.
Removal. Use this procedure to remove the rear chassis, battery board, power
supply, power supply bracket, line filter, fan, and rear USB cable.
1. Place the oscilloscope face down on soft surface (such as an anti-static mat),
with the bottom facing you.
2. Disconnect the following cables (see Figure 4--5):
a. Line trigger cable from main board connector J980.
b. DC power cable from main board connector J900.
c. Display backlight power cable from the battery board.
3. Turn the oscilloscope around so the top is facing you, and disconnect the
following cables (see F igure 4--5):
a. Rear USB cable from main board connector J815.
b. Ethernet cable from main board connector J920.
Rear Chassis
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