ZM400 Series Indicators Service Manual
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13.13 Keypad overlay replacement procedure
Problems that arise due to the keypad being changed are not covered by any warranty, such as keys not functioning correctly or water ingress through the front panel.
The IP69K rating cannot be guaranteed when changing the keypad overlay. If you are in an environment that requires the IP69K rating, it is advised that you order the keypad/enclosure assembly instead of changing out the keypad.
13.13.1 To change the keypad you will need these tools:
l
A razor blade
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A container big enough to place the indicator case in
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Rubbing alcohol.
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A large wooden dowel or wooden kitchen rolling pin.
13.13.2 Process to remove and replace the keypad overlay
1.
Open the enclosure and remove all electronic P.C. boards, including the display board.
2.
Use the razor blade to remove the old overlay and remove as much of the glue as possible.
3.
Place some rubbing alcohol in the container, enough to be able to submerge the front of the enclosure where the keypad was. No more than ½ an inch should be needed.
4.
Place the enclosure face down in the rubbing alcohol and soak it for 30 minutes.
5.
Use the razor blade to remove all remaining glue.
6.
Let the enclosure dry for at least 5 minutes.
7.
Place new keypad on the enclosure; ensure that the keypad is aligned correctly.
8.
Use rolling pin on the overlay to ensure good contact between the enclosure and the keypad overla
