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16 Pelco Manual C1488M-B (2/99)
5.0 TROUBLESHOOTING
Symptom: LED does not light.
If the red power LED on the door of the interconnect circuit board in the back box
does not light:
1. Turn off power.
2. Open the door to the interconnect circuit board and check the fuse. Refer to
Figure 10 for the location of the fuse. If the fuse is bad, replace it. To order a
replacement fuse from Pelco, specify the part number FUS1.6-5X20FAST. This
is a 1.6-ampere fuse, 5 x 20 mm, fast blow.
3. If the fuse is good, turn on power and use a voltmeter to check if 24 VAC is
getting to the power connector on the interconnect circuit board. Refer to Fig-
ure 10 for the location of the AC power connector.
4. If there is 24 VAC to the power connector, turn off the power and return the
back box electronic assembly to the factory for repair.
To remove the back box electronic assembly:
a. Turn off power.
b. Open the interconnect door and disconnect all wiring to the back box.
c. Use an 11/32-inch socket driver to remove the three 8-32 washers and
nuts that hold the electronic assembly to the back box. When the screws
are removed, the interconnect back box receptacle will drop down. It may
be necessary to move the open interconnect door past 90° vertical to-
ward the side of the back box to release the door from built-in grounding
strip (and free the interconnect back box receptacle).
d. Remove the interconnect back box receptacle with the electronic compo-
nents from the back box.
5.1 SERVICE MANUAL
If you need to service your unit, obtain a service manual in on of the following ways:
•Go to Pelco’s web site at ftp://www.pelco.com and find service manual
C1455SM.
• Contact Pelco’s Literature Department and request service manual C1455SM.