CHAPTER 6 DIRECT SUPPORT MAINTENANCE

TM 11-5895-555-24

CHAPTER 6

DIRECT SUPPORT MAINTENANCE

6-2. Troubleshooting Chart

6-1. Scope of Direct Support Maintenance

The following chart lists the control indicator

a. This chapter contains instructions covering

troubles by symtoms, suggest probable causes of

direct support maintenance for Control Indicator

each tremble, and suggests a logical procedure

C-8157/ARC and the MT-3802/ARC. The Con-

for isolating each trouble. The trouble symtoms

trol Indicator must be removed from the aircraft

are grouped into distinct classes of troubles such

if it fails during organizational maintenance, or

as retransmission, CIPHER, and ZEROIZE.

at anytime it proves to be faulty.

6-3. Tools and Test Equipment Required

b. When the control indicator has been re-

a. Tools. Tool Kit TK-105/G.

moved for bench testing, and the exact functional

failure is known (as indicated prior to removal),

b. Test Equipment.

use a multimeter, the schematic diagram (fig.

(1) Multimeter Electronic ME-26/U

8-1) and the troubleshooting chart (pars 6-4)

(2) Multimeter TS-352/U

to isolate the fault. Refer to figure 6-1 for parts

NOTE

identification.

All continuity checks are made with

c. With an ohmeter perform procedures in

POWER ON switch CB-1 in the ON

(up) position and power disconnected.

6-4. Troubleshooting Chart, Direct Support Maintenance

6-1