Nortel DMS-100 Series Maintenance Manual page 673

Adjust the rectifier voltage until the voltage is in specification (-52.0 Vdc, ± 0.3
2
V) and the currents from the two rectifiers are balanced. If the rectifier voltage
is low before adjustment, wait 24 h before you proceed with battery capacity
tests.
At the MAP terminal
3 To access the OPMPES MAP display level, type
>MAPCI;MTC;PM;PES
and press the Enter key.
4 To post the appropriate alarm, type
>POST alarm_state
and press the Enter key.
where
alarm_state
is RED or AMBER
5 To disable the audit facility, type
>AUDIT DISABLE
and press the Enter key.
6 To measure the voltage of the load bus, type
>MEASURE LOADB
and press the Enter key.
7 Repeat step 6 two more times. Make sure the voltage measurement is always
-51 or -52 V.
If LTU voltage measurements
are -51 V or -52 V
are not -51 V or -52 V
8 To enable the audit facility, type
>AUDIT ENABLE
and press the Enter key.
9 To replace the LTU, use the procedure for the NT2X10 or NT2X11 in Card
Replacement Procedures .
10 The procedure is complete.
OPM routine maintenance procedures
Rectifier voltage adjustment
DMS-100 Family OPM Maintenance Manual XPM14 and up
Do
step 10
step 9
13-71
OPM
(end)