Honeywell UDC2500 Manual page 5

Table 4: How to Remove the Display/Keyboard from the Chassis
Step
1 Remove the chassis from the case as shown in Figure 1.
2
Remove the Boards from the chassis as shown in Figure 3.
3 The Display/Keyboard is held in place by four slots in the Chassis as shown in Figure 4.
Using a small flat-blade screwdriver, lift up the two top slots one at a time while pulling
on the Display/Keyboard until it comes out of the slots. Rotate the Display/Keyboard
downwards until it can be pulled out of the bottom two slots.
4 Slots
Step
1 Remove the chassis from the case. (Figure 1)
2 Remove the printed wiring boards from the chassis. (Figure 3 and Figure 4)
3 Lay the boards flat and identify the board you are replacing. (Figure 2)
4 If present, the Output option board and the Option Input Board are held onto the
MCU/Input board with three posts. Locate these posts under the MCU/Input board.
5 Use small pliers and squeeze the ends of each post together and push it up through the
board.
6 Replace the board with the one from this kit. If the white ground lead on the old board
has a ferrite sleeve on it, remove the sleeve and place it onto the ground lead on the
new board.
7 Reinstall the Output Option and Option Input boards.
January 2017
Action
Top of Display
Figure 4: Removing Display/Keyboard
Table 5: Board Replacement Procedure
Action
51-52-33-137
Bottom of Display
5