BELL LABS INNOVATIONS Lucent Technologies 3B21D, Routine Maintenance Tasks

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Tasks Maintenance Routine
Units Cooling and Power Processor Verify
between measure voltage the does unit, power the on jacks test the At 1.2.
V? +5.1 and V +4.9
If yes Step to go , 1.4.
If no Step to continue , 1.3.
Step from repeat and tested, being unit power the Replace 1.3. 1.1.
NOTE:
254-303-102, to Refer Tasks Clearing Trouble Computer 3B21D ,
unit. power the replace to how on details for
tested? been 20-1 Table in listed units power equipped the all Have 1.4.
If yes, THIS COMPLETED HAVE YOU STOP!
SUBPROCEDURE.
If no Step from repeat , 1.1 20-1. Table in listed item next the for
less been has it If months. 6 every replace and filters air unit fan cooling the Check 2.
filters. new with filters dirty the replace dirty, are filters the and months 6 than
FILTERS AIR UNIT FAN COOLING CABINET PROCESSOR REPLACE
PROCEDURE:
NOTE:
cooling J5D003FH-2 the in filters air two contains cabinet processor The
fan the below directly one and unit fan the above directly one unit, fan
filters. both replacing for is subprocedure This unit.
!
CAUTION:
replaced be should filters air used The filters. air used the vacuum not Do
pack circuit the into getting from filings metal prevent to filters air new with
area.
be can retainers and (filters equivalent or apparatus following the Obtain 2.1.
Louis, St. East 853, Box P.O. Company, Filter Air Universal from ordered
62203): IL
(comcode filters air replacement 252A1 UAF Model Two
407277193)
407580513). (comcode retainers filter air type label Two
1999 April 3 Issue 254-303-101 20-3