Replacing The Lcd Display/Keypad - GE AquaTrans AT868 User Manual

September 2004
Replacing the LCD
Display/Keypad
Removing the Old LCD/
Keypad Board
Installing a New LCD/
Keypad Board
7-2
The LCD display/keypad assembly normally provides years of
dependable service, but it is easily field-replaceable when necessary.
To replace the LCD display/keypad, see Figure 7-1 on page 7-7 and
Figure 7-2 on page 7-8 for the component locations, and complete the
following steps.
1. Disconnect the power to the AT868 and move the electronics
enclosure to a flat service.
The main power to the Model AT868 must be disconnected
2. Loosen the six set screws on the front cover. Remove the front
cover.
3. Remove the four mounting screws on the LCD/keypad board.
Make sure you remove the flat and lock washers with the screws.
4. Grasp the LCD/keypad board by the side edges and carefully pull
it straight upward until it comes free from the Channel 1 board
below it.
5. Disconnect the keypad ribbon on the board below by sliding the
tabs on the connector upward and pulling the ribbon cable out.
1. Insert the keypad ribbon from the new board into the connector
and re-lock the connector by sliding the tabs downward. Make
sure the cable is not twisted.
2. Place the new LCD/keypad board in position over the Channel 1
board making sure to align the connector on the bottom of the
LCD/keypad board with the pins on the Channel 1 board. Firmly
push the two boards together.
3. Secure the LCD/keypad board to the Channel 1 board with the
four screw, flat washers and lock washers previously removed.
4. Replace the cover and tighten the six set screws.
The meter is now ready to be placed back into service.
Before powering up the AT868, make sure all the flat and
lock washers have been reinstalled. Washers or other
metal components left inside the enclosure may cause
electrical problems.
!WARNING!
before proceeding.
!WARNING!
Parts Replacement