Table 5-1. Troubleshooting Procedures (cont)

TM 55-6605-263-14&P

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Step 2. Check for stable and proper drift bias voltage.

Make proper voltage adjustment.

Step 3. Check drift bias adj. for smooth operation.

Replace defective component.

Erroneous heading displayed by Angle Position Indicator.

Step 1. Check Gyro position in case.

Rotate Gyro to correct heading.

Step 2. Check Gyro cable connection and drift bias voltage.

Replace defective component.

Angle Position Indicator does not track input data or is immobile at one angle.

Step 1. Check all cables and connections.

Replace defective component.

Angle Position Indicator continuously runs or displays large angular errors.

Step 1. Check all cables and connections.

Replace defective component.

10. One or more Angle Position Indicator numbers are always on or partially on.

Replace Angle Position Indicator.

5-5