TM 10-8145-222-23
0078
REPAIR CONTINUED
Shielded Ribbon Cable J12 Replace
1. Disconnect the battery terminals.
2. Remove pin and swing temperature chart recorder out of the way of the microprocessor controller on the left
side of the MTRCS.
3. Remove two bolts and open microprocessor control panel on left side of refrigeration unit.
4. Locate the shielded J12-P12 cable (Figure 16, Item 1).
5. Remove the four outer acorn nuts on the MPC box.
6. Unplug UFR2 module (Figure 15, Item 3).
7. Remove the four interior hex bolts that hold the MPC board to the hinged door.
8. Tag and remove the six colored wires (Figure 16, Item 1) from the P2 connector on the micro (at the small red
connector at the lower corner of the microboard). Depress the connector retainers to allow the wires to pull out.
9. Remove nut and washer (Figure 16, Item 2) at the corner of the microboard and remove the two ground wires
(Figure 16,Item 3).
10. Remove the bulkhead fitting (Figure 17, Item 2) where the shielded cable passes through the microboard panel.
11. Remove the wire ties (Figure 16, Item 5) to free the large black cable at the microboard.
12. Pull the shielded cable (Figure 16, Item 6) through the microboard panel.
13. Tag the single black cable that is coming off of the shielded cable (Figure 17, Item 3).
14. Cut and remove the two butt splices at the two green wires (Figure 17, Item 4).
15. Unclip the black EMI suppression device off of the cable wire (Figure 17, Item 5).
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