Ecom j2kn pro - Instrument Control and Status Monitoring

Page 33
15.4 How to Change NO, NO2, SO2, and High CO
Sensors (continued)
Step 5:
Use T-10 torx
wrench to
remove screws
shown here
Remove O2/CO
cover plate
Remove O2
sensor by
disconnecting
lead wires and
unscrewing
counter
clockwise
If necessary, break
wire tie mounted
in upper left corner
of base unit (see
arrow)
Step 6:
Remove
cradle as
shown here
(notice O2
sensor
removed)
Do not force
cradle—it
should swing
out without
too much
force
Step 7:
View of the
uncovered
sensor
manifold
To change the
sensor, remove
ribbon cable,
turn 45 deg-
rees counter
clockwise, and
pull directly out
Pry from beneath
the dried glue so
the PTC does not
separate from the
board—failure to
do so may destroy
PTC
Step 8:
Remove the
board from
the sensor
using a small
screwdriver
Warning:
PTC
embedded
in glue!
(continued on next page)