Technical data

Troubleshooting 4
4000 X-Series Oscilloscopes Service Guide 85
CAUTION
USE AN EXTERNAL FAN TO AVOID OVERHEATING COMPONENTS !
When you remove the oscilloscope cover and main shield, use an external fan to
provide continuous air flow over the heat sinks. Air flow over the heat sinks is
reduced when the cover and main shield are removed, which leads to higher than
normal operating temperatures. Have the fan blow air across the system board
where the heat sinks are located. Otherwise, damage to the components can
occur.
If the cabinet of a 4000 X-Series oscilloscope is removed but the main power
supply shield remains installed and the bottom holes are not blocked, the
instrument will cool properly.