Replacing The Liquid Crystal Display (Lcd) Board; Step-By-Step Instructions - ABB XSeries G4 6200 User Manual

4.10 Replacing the Liquid Crystal Display (LCD) board

The LCD board is mounted inside of the G4 EX front end cap. To access and
remove the display board, perform the following procedures.

4.10.1 Step-by-step instructions

1) Collect data from the unit.
2) Back up the configuration files following the instructions listed previously in
3) Verify that the "LL" battery alarm is not being displayed on the G4 EX LCD.
4) Gain access to the rear termination board by loosening the countersunk hex
5) Disconnect the power connector (J16) from the board mounted connector
6) Gain access to the LCD assembly by loosening the countersunk hex socket
7) After the end cap has been removed, gently pull the graphic overlay plate
8) Using a small flat head screw driver, remove the four screws that hold the
9) Gently disconnect the LCD board from the G4 EX board, J2 connector (see
10) To reinstall the LCD board, repeat steps 8 through 9 in reverse order. Do
11) Once the LCD board is reinstalled, apply power to the G4 EX (step 5), and
12) Adjust the contrast potentiometer, R1, for optimum display.
13) Replace the graphic overlay plate that was removed earlier.
2104349 rev. AD
Do not remove the lithium battery, since it provides power to
the RAM. It is recommended that historical flow data be
downloaded before accessing and removing the LCD board
to prevent the potential loss of stored data.
this chapter.
Remove power from the device, or insure the area is known to
be non-hazardous before removing any enclosure cover. For
further information, refer to the certification drawing indicated
on the device's nametag and national and local electrical
codes.
socket locking set screw in the rear end cap. Use a 1/16" hex wrench to
perform this task. Upon completion, unscrew the end cap.
(see Figure 4–5).
locking set screw in the front end cap. Use a 1/16" hex wrench to perform
this task. When completed, unscrew the end cap.
away from the snap on standoffs.
LCD board to the G4 EX device.
Figure 4–6). Lift the board from the device.
not over tighten screws.
verify that the information displayed on the LCD is correct.
To adjust the display contrast, use an extra small screwdriver
to turn the potentiometer, R1, completely clockwise. After
completing this, turn the screw back counter clockwise until
the screen is readable.
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