Lucent Technologies MERLIN LEGEND Release 5.0 Maintenance And Troubleshooting Manual page 93

MERLIN LEGEND Communications System Release 5.0
Maintenance and Troubleshooting 555-650-140
Control Unit Problems
Power Supply Problems
Checking the LED
If the power supply's LED is off, check the power switch. If it is off, turn on the
power switch for each power supply in the control unit. Start with the rightmost
carrier and end with the basic carrier. Watch for the following responses:
The green power LED should light on each power supply.
The red LED on the processor should turn on for 15 to 45 seconds and
then turn off.
All indicators on the 100D, 800 NI-BRI, and 400EM modules (if present)
should turn on and then off. They remain off when the modules are idle.
If any of these responses do not occur or if the console operator reports any
problems, continue with "Checking the Interlocking Post" below.
Checking the Interlocking Post
If the power supply is not working, follow the steps below to check the
interlocking post.
Follow Steps 1–4 in

chapter, to remove the power supply, then return to Step 2 below.
Check the small, cylindrical interlocking post on the carrier that

locks into the power supply (see
If the post is broken, replace the carrier.
''Replacing the Power
Figure
Supply'', later in this
4-1).
Issue 1
June 1997
Page 4-3