Figure 2-14. Removal of MODE SELECT switch.

TM 5-6675-250-34

Table 2-1. Troubleshooting - Continued

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

TS 006253

Figure 2-14. Removal of MODE SELECT switch.

(10). Install new switch in panel assembly and secure with attaching parts. Connect and solder

electrical leads to switch in accordance with the identification tags on the electrical leads.

CAUTION

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

(11). Install printed circuit board, but do not tighten mounting screws. Connect the two electrical

connectors and secure by tightening two screws. Fasten ten screws that secure printed circuit

board to mounting brackets.

(12). Place edge-lighted panel (fig. 2-13) over connector, seat properly and secure with five mounting

screws.

(13). Install BIAS control locking and BIAS knob on switch shaft. Secure BIAS knob by tightening

(14). Install TEST SELECT knob on shaft with pointer at source voltage position. Install MODE

SELECT knob on shaft with pointer at GC position. Secure each knob by tightening setscrews

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

2. MODE SELECT SWITCH CAN BE ROTATED COUNTERCLOCKWISE FROM GC, BRAKE OR PWR OFF POSITIONS

Step 1. Knob rotates on switch shaft. Knob setscrews loose or switch shaft worn. Tighten two setscrews in knob.

Replace switch.

a. Loosen the eight captive screws (fig. 2-15) and lift the electronic control panel assembly from

the case.

2-11