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TM 55-1905-223-24-18-2
Table 3-2. Troubleshooting-CONT
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Message
Cause
Possible Remedy
Buss "A" shorted
Data cable is damaged
Repair/replace CPU 3-125
Buss "B" shorted
Data cable is damaged
Repair/replace CPU 3-125
Bad master
Master card is defective
Replace, 3-125
Bad memory
Defective memory circuitry
Cycle power
RUDDER ANGLE INDICATOR
52. Rudder Angle Indicator does not operate.
STEP 1. Check for defective rudder angle indicator.
Replace/repair rudder angle indicator (para. 3-118).
STEP 2. Check for defective junction box assembly.
Replace/repair junction box assembly (para. 3-119).
AUTOPILOT
53. Autopilot system does not operate or operates erratically.
STEP 1. Check for incorrect or disconnected wiring.
Tighten all wiring connections.
STEP 2. Check for defective autopilot assembly.
Replace/repair autopilot assembly (para. 3-117).
FIRE DETECTION SYSTEM
54. Constant alarm on fire detection control panel.
STEP 1. Check for defective thermostatic switch.
Replace/thermostatic switch (para. 2-119).
STEP 2. Check for defective fire detection control panel.
Repair/replace fire detection control panel (para. 3-139).
STEP 3. Check for defective switchboard alarm panel.
Repair/replace shipboard alarm panel (para. 3-115).
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