User's Manual

Alarms Testing
68P09255A69-3
Aug 2002
1X SC4812ET Lite BTS Optimization/ATP Software Release 2.16.1.x
PRELIMINARY
3-110
Rectifier Over Temperature Alarm
Table 3-63 gives instructions on testing the rectifier over-temperature
alarm system.
CAUTION
Do not attempt to remove the MAP from the front of the frame
to perform the following procedure, even if the frame is equipped
with a MAP cable tray. MAP removal from the front requires
complete site shut-down to avoid accidently shorting 27 Vdc to
ground during the removal process.
Table 3-63: Rectifier Over-Temperature Alarm
Step Action
1
Remove the 14 tamper-resistant TORX fasteners securing the rear access panel to the rear of the
frame (Figure 2-1), and remove the rear access panel.
NOTE
Panel fastener type can be either T-27 button head or T-30 pan head.
2 Looking up through the frame rear access opening, locate the rear of the MAP.
3 Remove the jumper plug from connector J8 on the rear panel of the MAP (Figure 3-25). The
following conditions should occur:
- Contacts on K1 and K2 change states (K1 now closed and K2 open).
- The LMF reports an alarm condition as BTS Relay #26 contacts.
4 Reinstall the jumper plug in connector J8, and verify that all alarm conditions have cleared.
5 Reinstall the frame rear access panel, securing it with the 14 tamper-resistant TORX fasteners
removed in step 1.
Figure 3-25: MAP Connector J8 (Rear of MAP)
J4
J5 J1
J12
J3 J8 J9 J7
J2
CONNECTOR J8
SC4812ETL0021-2
Before Leaving the Site
If no further operations are required after performing the alarm tests,
complete the requirements in Table 5-8 before leaving the site.
3