RADIO SET SIGNALS ARE NOT RECEIVED BY REMOTE CONTROL UNIT HANDSET EARPIECE.

TM 11-5820-477-30

Table 2-3. Troubleshooting, Remote Control Unit (cont).

Malfunction

Test or Inspection

C o r r e c t i v e Action

7. RADIO SET SIGNALS ARE NOT RECEIVED BY REMOTE CONTROL UNIT HANDSET EARPIECE.

Step 1. Check for defective audio line transformer T201 by checking resistance of all transformer

If defective, replace transformer T201 (paragraph 2-13).

Step 2. Check for defective capacitor C214.

If defective, replace (paragraph 2-13).

Step 3. Check for defective switch S202 by checking continuity of switch (section A, contacts 4, 2, 3,

and 12,10,11).

If defective, replace (paragraph 2-14).

Step 4. Check for defective filter FL201 by checking resistance of filter (paragraph 2-5).

If defective, replace (paragraph 2-13).

Step 5. Check for defective VOLUME control potentiometer to determine if it is open.

If defective, replace (paragraph 2-14).

Step 6. Check for defective connector P201 or J204 by checking continuity between connectors

(pins B, D, F, E).

Replace defective connector (paragraph 2-13).

Step 7. Check for defective audio driver Q203 by checking for presence of operating voltage at

terminals 6 and 4 of component board A202.

If defective, replace (paragraph 2-13).

Step 8. Check for defective transformer T202 by making resistance measurements of transformer

If defective, replace (paragraph 2-13).

Step 9. Check for defective relay K201, by checking continuity of relay (terminals 7 and 8).

If defective, replace (paragraph 2-13).

8. RADIO SET SIGNALS ARE NOT RECEIVED BY REMOTE CONTROL UNIT INTERNAL LOUDSPEAKER.

Step 1. Perform all tests/inspections listed in malfunction 6.

Step 2. Check for defective transformer T202 by making resistance measurements between terminals 5,

6 and 7 of transformer (paragraph 2-5).

If defective, replace (paragraph 2-13).

2-11