User's Manual

Lucent Technologies — Proprietary
See notice on first page
401-660-100 Issue 11 August 2000
22-45
Continuous Register 1 and Register 3 Processor Alarms:
Symptoms:
1. Continuous LINEARIZER LED.
1. Numerous Processor alarms.
Suspect:
1. A blown fuse on the AYG3 circuit pack.
2. A blown FCA fuse on the front panel of the Linearizer.
Procedure:
1. Before checking any fuses, inhibit call processing and turn off all radios on
the LAC. Open all 5 breakers which feed the LAC.
2. For Register 3 alarms, check the FCA fuse on the front of the Linearizer.
Replace it with a 32V/10A AGC style fuse if blown.
3. On newly built LACs, there is a window on the left side of the Linearizer
sheet metal which allows access to a row of fuses in the AYG3 circuit
pack.Remove the screws holding the LAC in the frame and carefully pull it
out on the slides. Carefully pry off the spring-loaded fuse cover on the side
of the AYG3 pack, exposing a row of seven fuses in sockets.
4. Use a pair of needle-nose pliers to pull out F8, the second fuse from the
top, and F7 the third fuse from the top. They are both 3A Buss PC fuses
with part number BK/PCB-3. If either of these fuses is blown, replace
both
of them with Bussman BK/PCE-5 fuses.
Be careful not to drop a fuse
into the casting.
5. Reset the circuit breakers (with all radios off).
Reset the breaker
supplying the Linearizer first.
6. Turn on 2 radios and wait 2 minutes to allow the LAC to adjust.
7. Exercise the LAC with various numbers of radios, as described in the Radio
Control Procedure to confirm that the alarm condition does not re-occur.
!
CAUTION:
The other AYG3 fuses should not be replaced in the field. If one of these
fuses blows, it may have been caused by a short circuit inside the
Linearizer. If any of these fuses fails, the LAC should be replaced.
Other Continuous Processor Alarms:
Symptoms:
1. Continuous LINEARIZER LED.