Tektronix DPO3000 Series, Service Manual

Page: 49 / 79

Maintenance
Attenuator Board Follow these steps to remove the attenuator board. You need to have previously
removed the rear case assembly, rear chassis, power supply, I/O board, and main
board. Use a TORX T15 screwdriver tip. (See Figure 5-5 on page 5-13.)
1. Remove the six T15 screws that connect the main board shield to the chassis.
Note that there are two lengths; the shorter ones go through the side rail.
When reinstalling torque these screws to 8.0 in/lb.
2. Remove the main board shield and set it aside.
3. Remove the nine T15 screws that connect the attenuator board to the chassis.
Note that there are two lengths; the shorter ones go through the side rail.
When reinstalling torque these screws to 8.0 in/lb.
4. Remove the attenuator board and place it on a static-free surface.
Front Chassis Follow these steps to remove the front chassis. You need to have previously
removed the rear case assembly, rear chassis, power supply, I/O board, main
board, and attenuator board. Use a TORX T15 screwdriver tip. (See Figure 5-6
on page 5-15.)
1. Disconnect the cables connected to J101 and J103 on the front panel board.
2. Remove the eight T15 screws that connect the front chassis to the front case.
When reinstalling torque these screws to 8.0 in/lb.
3. Lift the front chassis from the front case and place it on a static-free surface
with the LCD assembly facing up.
MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 4–11