Download GE Infrastructure Sensing

November 2004
Replacing the LCD
Display
An optional LCD display may be included with the Model XGS868.
The LCD display normally provides years of dependable service, but
it is easily field-replaceable when necessary. To replace the LCD
display, see Figure 4-1 on page 4-13 for the component locations, and
complete the following steps:
1. Complete the steps in Removing the Circuit Board Assembly on
page 4-2.
2. Place the circuit board assembly on a flat surface with the LCD
display board facing upward. Refer to the FRONT VIEW (upper
right) in Figure 4-1 on page 4-13, and remove the three mounting
screws (with flat washers and lock washers) indicated.
3. Grasp the LCD display board at the top and bottom edges, and
carefully pull it straight upward until it comes free from the
interconnect board.
Note: The two circuit boards are attached by a connector located
beneath the top edge of the LCD display board (see the top
middle view in Figure 4-1 on page 4-13).
4. Place the new LCD display board directly over the interconnect
board and align the electrical connector on the rear of the LCD
display board with the P3 pins on the interconnect board. Firmly,
push the two boards together until the LCD display board contacts
the three standoffs on the interconnect board.
5. Secure the LCD display board to the interconnect board with the
three screws, flat washers and lock washers previously removed.
Note: The display contrast and backlight brightness are adjustable
via two potentiometers located on the LCD display board. See
Figure 4-1 on page 4-13 to locate these components and refer
page 2-1 in the Programming Manual for instructions.
Complete the LCD display board replacement by proceeding to
Installing the Circuit Board Assembly on page 4-11.
4-4
Parts Replacement