Figure 2-31. Removal of BIAS control knobs.

TM 5-6675-250-34

Table 2-1. Troubleshooting - Continued

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

TS 006270

Figure 2-31. Removal of BIAS control knobs.

e. Unscrew BIAS control locking knob from BIAS control shaft remove.

f. Remove five screws (fig. 2-32) securing edge-lighted panel to control panel.

TS 006271

Figure 2-32. Removal of edge-lighted panel.

g. Using orangewood sticks, lift edge-lighted panel off control panel.

h. Install a new edge-lighted panel over connector and seat properly.

i. Install five mounting screws to secure panel in place.

5. TEST METER FAILS TO PROVIDE REQUIRED INDICATIONS DURING SELF-TEST OPERATION

Step 1. Check for defective gearbox assembly in SERVO and GYRO test modes by performing the following test.

Apply power and check operation as follows:

a. Place TEST SELECT switch to GYRO; verify that the TEST METER indicates a zero reading.

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