Rack Mount Lcd Display Replacement - GE DigitalFlow GC868 Service Manual

April 2008
Rack Mount LCD Display
Replacement
B-6
The Model GC868 measurements are displayed on a two-pane LCD
graphic display panel. The LCD display normally provides years of
dependable service, but it is field-replaceable when necessary.
To replace the LCD display, refer to Figure B-2 on page B-11 and
complete the following steps:
1. After disconnecting the main power to the meter, remove the top
panel from the enclosure by removing the four screws indicated.
The main power to the Model GC868 must be
disconnected before proceeding.
2. Using a 3/16" nutdriver, remove the four nut/washer sets that
secure the display shroud to the inside of the front panel. Pull the
display shroud off its mounting studs.
3. Using a 1/4" nutdriver, remove the four standoffs that secure the
LCD display assembly to the front panel. Pull the LCD display
assembly off its mounting studs.
4. Place the new display in the enclosure and replace the circuit
board connections of the data and power cables of the old display
with those of the new display. Be sure to orient the new cables in
the same way as the old ones, when making the connections to the
printed circuit board. Remove and discard the old LCD display.
5. Place the new LCD display assembly over the mounting studs on
the front panel and fasten it in place with the four standoffs. Make
sure that the LCD display assembly is oriented with the cables
pointing toward the left side (away from the keypad) of the meter.
Do not overtighten the standoffs or the display assembly
6. Position the LCD display cables between the two mounting studs,
and install the display shroud over the mounting studs. The top
and bottom edges of the shroud are bent at a 90° angle to the main
surface, and these edges must face inwards toward the display
assembly.
Note: One edge of the display shroud is covered with a piece of
black electrical tape. This side of the shroud should be over
the cables to protect them against abrasion.
!WARNING!
Caution!
may be damaged.
Optional Enclosures