Figure 2-63. Removal of printed circuit board.

TM 5-6675-250-34

Table 2-1. Troubleshooting - Continued

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

TS 006302

Figure 2-63. Removal of printed circuit board.

b. Unfasten ten screws securing the printed circuit board to 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 tbe

connectors.

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

d. Use an ohmmeter and check continuity of MODE SELECT switch (2A2S3) in BRAKE ON position between

pins A and A6, B and B6, and C and C6.

If continuity is not present, replace a bad MODE SELECT switch.

(1) Place MODE SELECT switch to GC position (fig. 2-64).

2-53