Table 1. Radio Circuits Troubleshooting Procedures.

TM 9-2320-303-24-1

Table 1. Radio Circuits Troubleshooting Procedures.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Power Source For 24 VDC Radio Does Not 1. Check 24 VDC 25A radio fuse. If defective, replace 25A fuse (WP

Operate.

0072 00).

2. Remove 24 VDC 25A radio If +24 VDC is present, go to step

fuse. Check for +24 VDC at 3. If no voltage is present, repair

lead 421W fuse connector.

lead 421W to 24 VDC constant

power bus.

3. Check for continuity between If continuity is indicated, go to

ground lead and ground.

step 4. If no continuity is

indicated, repair ground lead.

4. Check for +24 VDC at lead If defective, replace 10A fuse (WP

421R from radio power source 0072 00).

connector.