Garmin 155XL Maintenance Manual - page 17
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)