Sensidyne Sensalert Manual - Preliminary
PRELIMINARY
Sensidyne Document No. 7013227M (Rev H)
35
SENSALERT FOUR CHANNEL CONTROLLER
6.3
REPLACING THE DISPLAY PCB
The Display PCB is attached to four (4) metal stand-
offs in the controller enclosure. It should be replaced
when it is damged or is defective. Make certain all
power is removed from the controller when performing
this procedure.
Refer to Figure 1.1 and replace the Display PCB as fol-
lows:
1)
Unlatch and open the controller enclosure cover.
2)
Unscrew the four (4) mounting screws on the Dis-
play PCB.
3)
Partially remove the Display PCB.
4)
Disconnect the ribbon cable from the bottom of
the Display PCB.
5)
Remove the defective Display PCB.
6)
Connect the ribbon cable to the bottom of the
new Display PCB.
7)
Align the left hand mounting holes of the Display
PCB over the hinged standoffs.
8)
Install two (2) of the mounting screws. Make cer-
tain the screws are properly inserted into the
hinged standoffs.
9)
Swing the Display PCB closed and install the re-
maining two (2) mounting screws.
10) Close and latch the controller cover.
6.4
REPLACING THE BOTTOM PCB
The Bottom PCB is attached to four (4) metal stand-
offs in the controller enclosure. It should be replaced
when it is damged or is defective. Make certain all
power is removed from the controller when performing
this procedure.
Refer to Figure 1.1 and replace the Bottom PCB as fol-
lows:
1)
Unlatch and open the controller enclosure cover.
2)
Unscrew the four (4) mounting screws on the Dis-
play PCB.
3)
Partially remove the Display PCB.
4)
Disconnect the ribbon cable from the Bottom
PCB.
5)
Remove the terminal plugs from terminals J2
through J12 (as appropriate). Remove the ground-
ing wire and washers.
6)
Unscrew all four (4) standoffs. Remove the
lockwasher and flat washer from each post.
7)
Remove the defective Bottom PCB.
8)
Install the new Bottom PCB.
9)
Place a flat washer and lock washer over each
mounting post. Install the grounding wire and
washers.
0)
Install the four (4) standoffs. Make certain the
hinged standoffs are installed on the left side.
11) Replace the terminal plugs removed earlier.
12) Align the left hand mounting holes of the Display
PCB over the hinged standoffs.
13) Install two (2) of the mounting screws. Make cer-
tain the screws are properly inserted into the
hinged standoffs.
14) Swing open the Display PCB and connect the rib-
bon cable to the new Bottom PCB.
15) Swing the Display PCB closed and install the re-
maining two (2) mounting screws.
16) Close and latch the controller cover.