Technical data

Chapter 8: Troubleshooting

8.2.19 Procedure S

If the green PWR LED is "ON," the yellow SYSTEM TROUBLE LED is "ON," and one of the

IN# LEDs (D55, D58, D62, D65, D75, D78, D84, or D87) are "ON," a DV Contact Closure

Wiring Trouble exists.

Perform the following:

1. If a particular Contact Closure is not being used, make sure nothing is on the

corresponding terminal block (TB7 or TB8) and the corresponding IN CC

Supervision is turned OFF at switch SW7.

2. If a particular Contact Closure is being used, make sure that a UL approved 10k Ohm

½ W EOLR is installed on the proper terminals.

8.2.20 Procedure T

If the unit is in normal standby mode yet excessive noise is being heard from the speakers, the

unit may not be properly grounded to the enclosure.

Perform the following:

1. Verify that the 4 metal standoffs are installed and securely fastened. Refer to figure

3-9 for location of the grounding standoffs.

2. Verify that the 4 screws are installed and securely fastened. Refer to figure 3-9 for

location of the grounding screws.

SP40S Multi-Function Facility Communication System Manual, Revision D