Troubleshooting guide

61186003L1-1D 7-35
DLP-506
Connect MX2820 Wire-Wrap Posts
INTRODUCTION
This procedure provides step-by-step instructions to connect the wire-wrap posts on the
MX2820 backplane.
The wire-wrap posts for the MX2820 system include the following:
• AUX1, AUX2, AUX3 for external (environmental) alarms
The AUX3 wire-wrap posts can be used as a fan alarm also.
• ACO for an alarm acknowledgment and audible alarm cutoff switch
• Critical (CRIT), Major (MAJ), and Minor (MIN) alarm relays
•CHAIN
•CLKA and CLKB
Figure 7-6 shows the wire-wrap posts locations on the MX2820 backplane.