120 5
Power Supply Troubleshooting
START HERE
START HERE
1. Check the Fan
Look at the fan on the rear panel. Check that the fan is rotating.
• If the fan is not rotating, continue with the FIND OUT WHY THE FAN IS NOT
ROTATING section in this chapter.
• If the fan is rotating, continue with Check the A50 SHUTDOWN LED.
2.Check the A50 SHUTDOWN LED
There is a LED, SHUTDOWN LED, on the A50 DC-DC Converter. Perform the following
procedure to check it. The SHUTDOWN LED is described in the next A50 SHUTDOWN
LED.
1. Turn the analyzer power off.
2. Remove the analyzer's top cover and shield plate.
3. Turn the analyzer power on.
4. Look at the A50 SHUTDOWN LED. The LED is normally on. The SHUTDOWN
LED location on A50 DC-DC Converter is shown in
Figure 5-2.
• If the A50 SHUTDOWN LED is off, continue with the FIND OUT WHY THE A50
SHUTDOWN LED IS OFF section in this chapter.
• If the A50 SHUTDOWN LED is on, continue with Check the A50 Five LEDs.
Figure 5-2 A50 SHUTDOWN LED and Five LEDs Location
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