CHAPTER 2 TROUBLESHOOTING
– 176 – NWA-008847-001 Rev.3.0
a6ch2001.fm
Remedial Action on Each Lamp Status
Continued on next page
CARD NAME
LAMP
STATUS
FAULT
CONTENT
REMEDIAL ACTION
PN-4BRTA-A
(BRT)
RUN lamp is not
flashing
Abnormal opera-
tion of BRT card
Confirm the programming data:
CM05 Y=0/Y=1.
Check to see if the SENS switch is
set as per the AP Number (04-15,
20-31) assigned by CM05, CM07
Y=2.
Reset the MB switch.
(Down Up Down)
If the fault cannot be cleared,
replace the card.
ALM3 lamp is on No.3 circuit trans-
mission line fault
Confirm No.3 circuit line status.
Confirm PSTN line status.
ALM2 lamp is on No.2 circuit trans-
mission line fault
Confirm No.2 circuit line status.
Confirm PSTN line status.
ALM1 lamp is on No.1 circuit trans-
mission line fault
Confirm No.1 circuit line status.
Confirm PSTN line status.
ALM0 lamp is on No.0 circuit trans-
mission line fault
Confirm No.0 circuit line status.
Confirm PSTN line status.
1
2
3
4
1
2
1
2
1
2
1
2
FAULT DIAGNOSIS AND TROUBLESHOOTING
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