TM 10-8145-222-23
0078
REPAIR CONTINUED
Replace MPC Circuit Board
1. Remove bolt (Figure 9, Item 1) securing ground wires (Figure 9, Item 2) to MPC panel (Figure 9, Item 3).
2. Remove three bolts (Figure 9, Item 4) securing panel (Figure 9, Item 3) to door (Figure 9, Item 5).
3. Remove four captive nuts (Figure 9, Item 18) securing panel (Figure 9, Item 3) to door (Figure 9, Item 5).
NOTE
The panel will remain attached to the door with the wiring attached to the panel and
components located on the front of the panel.
Before touching the logic board with hand or tool, attach a grounding wrist strap
between wrist and solid frame ground. The grounding strap must be worn during the
entire replacement process
4. Carefully remove panel (Figure 9, Item 3) with MPC circuit board (Figure 9, Item 6) attached.
5. Disconnect electrical connector P2 (Figure 9, Item 12) from MPC circuit board (Figure 9, Item 6).
6. Cut tie wrap (Figure 9, Item 14) securing P2 cable (Figure 9, Item 12) to MPC circuit board (Figure 9, Item 6).
7. Remove one nut (Figure 9, Item 8), washer (Figure 9, Item 9), and nylon washer (Figure 9, Item 10) securing
ground wires (Figure 9 Item 13) to MPC circuit board (Figure 9, Item 6).
8. Remove two screws (Figure 9, Item 15) and washers (Figure 9, Item 16) securing two electrical connectors
(Figure 9, Item 17) and wiring (Figure 9, Item 7) to MPC circuit board (Figure 9, Item 6).
9. Disconnect two electrical connectors (Figure 9, Item 17) from MPC circuit board (Figure 9, Item 6).
10. Remove seven remaining nuts (Figure 9, Item 8), washers (Figure 9, Item 9), nylon washers (Figure 9, Item 10),
and eight spacers (Figure 9, Item 11) securing MPC circuit board (Figure 9, Item 6) to panel (Figure 9, Item 3).
11. Remove MPC circuit board (Figure 9, Item 6) from panel (Figure 9, Item 3).
NOTE
The 8 10mm nuts must be tightened in the following pattern to avoid board pressure that could damage
circuitry. Do not over-tighten the nuts.
7
4
5
1
2
8
3
6
0078-13
