Nortel DMS 100 Series Maintenance Manual page 118

5-8 RSC-M alarm clearing procedures
Ext RSC-M/RCO2
RSC-M cabinet with MSP shelf major
29
30
31
32
33
34
35
36
297-8223-550 Standard 04.02 November 2000
Determine if the pins in the backplane of the shelf are bent or short-circuited.
Note: The backplane is at the rear of the RSC-M cabinet.
If the pins
are not bent or short-circuited
are bent or short-circuited
Set the circuit breaker to OFF.
Replace the alarm module (NTRX41AA). Perform the correct procedure in
the Card Replacement Procedures . Complete this procedure and return to
this point.
Push up the power switch on the converter. Hold the power switch in the
RESET position while setting the circuit breaker to ON.
Release the power switch on the converter to the ON position.
If the CONVERTER FAIL LED
is not lit
is lit
Determine if the FRAME FAIL lamp on the MSP is lit.
If the FRAME FAIL lamp
is lit, and blown fuses are
present on the MSP
is lit, and blown fuses are not
present on the MSP
is not lit
Repair the cooling unit that has defects. Perform the correct procedure in the
Routine Maintenance Procedures . Complete this procedure and return to
this point.
Determine if the FRAME FAIL lamp on the MSP is lit.
If the FRAME FAIL lamp
is lit
is not lit
(continued)
Do
step 30
step 40
Do
step 34
step 40
Do
step 4
step 40
step 37
Do
step 2
step 37