Installation guide

SENSORNET SINGLE-POSITION JUNCTION BOX (J-BOX) 8000-2573-21, REV. F
INSTALLATION GUIDE 8 of 10
Troubleshooting
Problem Possible Solution
No Power First check both fuses, then
look for open or loose wire
connections at TB1. If loose,
reconnect wires.
Measure voltage across 0
and 24V taps of secondary
winding on transformer. If
open, replace transformer.
See “Removing the
Transformer” opposite.
No Data Check for loose wires. If OK,
see “Testing for Power and
Data” on page 7.
Removing the Circuit Board
Follow steps to remove the circuit board. Reverse
steps to reassemble.
1. Loosen four captive screws to release cover.
2. Remove six screws to remove circuit board
(Figure 9).
Figure 9.
Removing the Transformer
Follow steps to remove the transformer. Reverse
steps to reassemble.
1. Loosen four captive screws to release cover.
2. As shown in Figure 10, loosen two screws shown
in and slide chassis in direction of arrows. Gently
lay chassis on inside front cover while working on
transformer. Slide PCB chassis out of box.
Figure 10.
3. Remove four nuts to remove transformer
(Figure 11).
Figure 11.
Screws (2)
Nuts (4)
Screws (6)
Screws (6)