ETI NETCOM ADH Replacement Procedure page 14

4. Remove and retain the four mounting
screws from the four corners of the
protective front cover, then slowly lift
the front cover, carefully flip it over,
then set it down, upside down, to rest
on the inside of the enclosure door.
Be careful as there are still many wires
connected between the enclosure
and the front cover and there isn't a
lot of slack. Note that the two upper
front cover mounting screws are
located in plain sight in the top
corners of the front cover, while the
two lower
mounting screws are located down in
the front "well" of the unit. Use the
long Phillips screwdriver to remove
them.
An Electro-Static Discharge (ESD) wrist
5.
strap and mat are required to handle a
PC board and perform this procedure
safely. If you haven't already done so,
put on an ESD wrist strap and work on
an ESD mat.
Disconnect the "Smart Switch" cable, if
6.
your unit has one, and the RS232 cable
from the two receptacles on the right
side of the circuit board. Refer back to
Figure 1b on page 5. The "Smart
Switch" cable is the upper one on the
right side; the RS232 cable is the lower
one. Disconnect the Alarm Relay
cable from the receptacle on the left
side of the board. Gently fold back
the release handles and the cable will
disconnect.
Disconnect the two AC power supply
7.
module leads (black and red) from the
left side of circuit board terminal block
J4. Refer to Figure 2 below. Press in
on the orange release tabs under each
lead, then carefully remove the leads
from terminal block J4.
South Bend, Indiana USA | networketi.com
front cover corner
8. Disconnect the two pairs of white
and red LED leads (4 total) from the
four terminals on the right side of
terminal block J4. Refer to Figure 2.
Power
Supply
Press in gently on orange release tabs using flat
blade screwdriver to replace leads.
Figure 2. TERMINAL BLOCK J4.
9. From circuit board terminal block J17,
carefully remove the two yellow leads
coming from the humidity sensor.
Refer to Figure 3. Use a flat blade
screwdriver to gently press in on either
orange release tab, then gently
remove the lead from the terminal.
Repeat for the second lead.
To remove leads,
gently press in on
orange release
tabs using flat
blade screwdriver.
Figure 3. TERMINAL BLOCK J17.
14
ADH INSTRUCTION MANUAL | PART NO.
Green Red
LED LED
24097 REV B