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DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127
Issue 1
August 1997
Maintenance Object Repair Procedures
Page 10-276CARR-POW (Carrier Port Power Unit) for DC-Powered Systems
10
FAIL
(cont’d.)
3. Unplug both port carrier power units, and wait about one-minute to
allow the port carrier power units to cool down. Plug in the port carrier
power units. If either port carrier power unit is operating properly (that
is, the status LEDs show green), then replace the defective port carrier
power unit(s). See "Port Carrier Power Unit Replacement Procedures"
in this section.
4. If the replaced port carrier power unit(s) still does (do) not operate
properly, then a circuit pack or a defective telephone connected to a
circuit pack in the affected carrier could be causing an electrical load
which is preventing the port carrier power unit from operating
properly. Unseat all the circuit packs in the carrier, and reissue the
recycle carrier command.
a. If the recycle passes, then the port carrier power units are healthy,
and the problem is with one of the circuit packs. Reinsert the circuit
packs one at a time. If the status LED shows red after reinserting a
circuit pack, replace the defective circuit pack. If the status LED
still shows red, remove the Amphenol connector on the back of the
slot containing this circuit pack and reissue the recycle carrier
command. If the status LED shows green, the problem is with one
of the telephones or the wiring to one of the telephones on this slot.
If the status LED still shows red, escalate the problem.
b. If either port carrier power unit still shows a red status LED, check
for bent pins and cable placement in the affected carrier. There are
failures that can occur on the Maintenance/Tape Processor,
Duplication Interface, and EPN Maintenance circuit pack that are
not detected by the respective maintenance, but that cause many,
if not all, environment tests to fail. If many environment tests are
failing, the suspect circuit pack, depending on the system
configuration, should be replaced and the test rerun. If no other
problems can be found, escalate the problem.
PASS Both port carrier power units in the tested carrier were found to be healthy
by the Maintenance/Tape Processor in a PPN for a High or Critical
Reliability system, the Duplication Interface circuit pack in a PPN for a
High or Critical Reliability system, or the EPN Maintenance circuit pack in
an EPN multicarrier cabinet system. If the status LEDs on both port carrier
power units are not showing green, the PR-MAINT (Maintenance/Tape
Processor), DUPINT (Duplication Interface) circuit pack, or the EPN MAINT
(Maintenance) circuit pack may have incorrectly reported the state of the
port carrier power units. Look for and resolve any alarms on these MOs.
Table 10-90. TEST #127 Power Unit Query Test — Continued
Error
Code
Test
Result Description/ Recommendation
Continued on next page