Nortel DMS-100 Series Maintenance Manual page 247

Basic troubleshooting procedures for the Star Module, accessed at the MAP
terminal through the remote line drawer (RLD) level alarms, are listed in the
following table.
Table 8-2 Star Module alarm clearing
Alarm condition
Critical (when the
CRIT light emitting
diode [LED] on the
Star Module
Controller (SMC)
card is lit)
Major (when the
MAJ LED on the
SMC card is lit)
Possible cause
The +15 V power converter has failed.
Both fans are not operating.
Talk battery fuse is blown.
Fans and heater, LTU, or ISDN power
supply fuse is blown.
No ac power input available.
The ac to dc converter failed.
LTU failure
The power converter has failed and
does not supply Coin voltage.
Low ringing voltage output from the
power converter.
One fan is not operating.
Cabinet front door is open.
DMS-100 Family NA100 Star Remote System XPM15 and up
Troubleshooting chart 8-5
Action
Identify and post the SysB RLD.
Busy the RLD with faults.
Test and RTS the RLD with faults.
Check for blown fuses, tripped circuit
breakers, or disconnected cables in
the Star Module.
Replace cards in card list, if displayed.
Use the correct card replacement
procedures.
If an RTS fails, load the RLD with
faults.
RTS the RLD.
Identify and post the ISTb RLD.
Identify fault indicators with
QUERYPM FLT command.
If the RLD is CBsy, identify C-side
links to Star Hub.
Post Star Hub for P-side links with
faults.
Busy, test, and RTS the P-side links
with faults.
Post, busy, test, and RTS the Star
Hub with faults.
If the RLD is SysB, busy and test the
RLD with faults.
If the test fails with no card list, retest
and RTS the Star Hub unit with faults.
If the RLD is ManB, test the RLD with
faults.
If the test fails with a card list, replace
any faulty cards. Test and RTS the
RLD.
RTS the RLD.