Figure 2-35. Removal of ECU panel assembly.

TM 5-6675-250-34

Table 2-1. Troubleshooting - Continued

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

TS 006274

Figure 2-35. Removal of ECU panel assembly.

b. Unfasten ten screws securing the printed circuit board to the mounting brackets and loosen the board

to obtain access to electrical connectors.

CAUTION

To avoid damage to the electrical connectors, alternately back-off each of the two attaching screws when removing the

connectors.

c. Disconnect two electrical connectors (2A2J5 and 2A2J6) by unfastening two screws at each connector.

d. Inspect printed circuit board for visual evidence of cracked circuits, corrosion, burns, or other

evidence of defects.

Replace a bad printed circuit board.

CAUTION

To avoid damaging the electrical connectors, alternate tightening each of the two screws during assembly.

(1). Install a good printed circuit board, but do not tighten mounting screws. Connect the two

electrical connectors and two electrical connectors and secure by tightening two screws. Fasten

ten screws that secure printed circuit board to mounting brackets.

(2). Install electronic control panel assembly in case and secure with eight captive screws.

Step 4. Check for defective PRESS TO TEST switch (2A1S2, MODE SELECT switch (2A1S3), or TEST SELECT switch

(2A1S1).

a. Loosen the eight captive screws and lift the electronic control panel assembly from the case (fig. 2-36).

2-28, Change 1