RADIO SET TRANSMlTTER IS ENERGIZED BY REMOTE CONTROL UNIT BUT SIGNALS ARE NOT TRANSMITTED.

TM 11-5820-477-30

Table 2-4. Troubleshooting, Local Control Unit (cent).

Malfunction

Test or Inspection

Corrective Action

9. RADIO SET TRANSMITTER IS ENERGIZED BY LOCAL CONTROL UNIT BUT SIGNALS ARE NOT

TRANSMlTTED (cent).

Step 3. Check for defective transformer T102 by checking resistance of all transformer windings

If defective, replace (paragraph 2-13).

Step 4. Check for defective filter FL104 by checking resistance of filter (paragraph 2-5).

If defective, replace (paragraph 2-13).

Step 5. Check for defective connector PI 01 by checking continuity of connector (pin D).

If defective, replace (paragraph 2-14).

10. RADIO SET TRANSMlTTER IS ENERGIZED BY REMOTE CONTROL UNIT BUT SIGNALS ARE NOT

TRANSMITTED.

Step 1. Check for defective filter FL101 by checking resistance of filter (paragraph 2-5).

If defective, replace (paragraph 2-13).

Step 2. Check for defective relay K101 by checking continuity of relay (terminals 4 and 2).

If defective, replace (paragraph 2-13).

Step 3. Check for defective attenuator by checking for open resistor R114, R115, R116, R117, R118

or R119.

Replace defective resistor(s) (paragraph 2-13).

Step 4. Check for defective switch S102 by checking continuity of switch (section B rear, contacts

2 and 4).

If defective, replace (paragraph 2-14).

Step 5. Check for defective Transformer T102 by checking resistance of all transformer windings

If defective, replace (paragraph 2-13).

Step 6. Check for defective filter FL104 by checking resistance of filter (paragraph 2-5).

If defective, replace (paragraph 2-13).

Step 7. Check for defective RADIO connector P101 by checking continuity of connector (pin D).

If defective, replace (paragraph 2-14).

2-18