Ametek 241CE II Operator's Manual page 143

4. To replace the push-buttons and Window Housing Assembly:
a. Remove all of the M10 screws that secure the enclosure door (ana-
lyzer housing) to its housing and open the door.
b. Take appropriate precautions to avoid causing electrostatic dam-
age to the circuit board. Remove the (6) screws that secure the
circuit board to the enclosure door.
Remove the board and carefully allow the board to hang by its
wiring inside the Electronics Enclosure.
c. Remove the (2) M4 x 16 screws that secure the Push-Button Re-
tainer to the enclosure door.
When removing the Push-Button Retainer, tilt it upward slightly
to ensure the Return Springs remain in the retainer when it is
removed. These parts can be re-used if they are not damaged.
Remove the Push-Button Actuators from the analyzer housing.
Clean the holes in the analyzer housing.
d. Insert (1) new Push-Button into each push-button hole in the ana-
lyzer housing. Place (1) spring into the end of each push-button.
Align the holes in the Push-Button Retainer with the four push-
buttons/springs and slowly place it over the push-buttons/springs,
making sure they are properly enclosed in the retainer.
Replace the (2) M4 x 16 screws that secure the Push-Button Re-
tainer to the enclosure door. Alternate turns on each screw while
observing the springs to ensure they do not bind as you tighten
the retainer. Tighten the screws only until they are snug. Do not
overtighten them.
e. Take appropriate precautions to avoid causing electrostatic dam-
age to the circuit board and position the circuit board in its original
mounting location. Remove the (6) screws that secure the circuit
board to the enclosure door. Tighten the screws only until they are
snug. Do not overtighten them.
f. Close the enclosure door and replace all of the M10 screws that
secure the door to the Electronics Enclosure. The torque specifica-
tion to fasten M10 screws is 9.0 Nm, ±0.7 Nm (80 in.-lb, ±9 in.-lb).
Maintenance and Troubleshooting
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