Keysight E4982A Troubleshooting Manual page 26

1
Troubleshooting
24
Step 1.
Check fan operation and DC monitor LED.
If the rear panel fan (blower) doesn't run, a failure in power
supply is assumed. Remove the E4982A outer cover and
check if the following LEDs light:
• +3.3 V and +5 V DC monitor LEDs on A60 CPU module as
shown in Figure 4.
• LEDs on A51 DSP module as shown in
Figure 4 LEDs on CPU module
Figure 5 LEDs on DSP module
Figure 5.
LCR Meter