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3-2 190-00067-25 Rev D
Table 3-1. Self-Test Failures
MESSAGE RECOMMENDED REPAIR
Battery low (optional battery) If battery/charger pack is not installed, change configuration to
Remote Battery: None
If battery is installed verify charge is set for ‘AUTO’ and allow
to charge for 1 hour
Verify connections to remote battery/charger pack
Replace remote battery pack (see section 4.3.10)
Configuration reset Replace CPU board (see section 4.3.5)
Data card failed
Replace NavData card
Replace interface board (see section 4.3.4)
Replace CPU board (see section 4.3.5)
EEPROM write fail Replace CPU board (see section 4.3.5)
Fuel/Air Input Failed Check connections to fuel/air data system
Replace CPU board (see section 4.3.5)
Memory battery low Replace memory battery (see section 5.3)
Osc needs adjustment Replace GPS receiver board (see section 4.3.6)
Replace CPU board (see section 4.3.5)
Power down and re-init Turn unit off and then back on again
Verify connection between CPU board and GPS receiver board
Replace GPS receiver board (see section 4.3.6)
Replace CPU board (see section 4.3.5)
RAM failed Replace CPU board (see section 4.3.5)
Receiver failed Replace CPU board (see section 4.3.5)
Replace GPS receiver board (see section 4.3.6)
Rcvr needs service Verify connection between CPU board and GPS receiver board
Replace GPS receiver board (see section 4.3.6)
Replace CPU board (see section 4.3.5)
Stored data lost Replace memory battery (see section 5.3)
Altitude Input Fail Verify connections to Altitude Serializer/Encoder
Replace Altitude Decoder Board (see section 4.3.3)
Replace CPU Board (see section 4.3.5)
No Altitude Input Replace Altitude Decoder Board (see section 4.3.3)
Replace CPU Board (see section 4.3.5)