Table 2-1. Troubleshooting - Continued
TEST OR INSPECTION
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.
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.