Table 8-3 C-Bit Failures Troubleshooting Chart - BENDIXKing XVUE TOUCH Installation Manual

• FPGA SPI Bus Monitor
• Ambient Light Sensor Monitor
Refer to Table 8-3 for troubleshooting of the C-BIT failures.
Symptom
PFD Data Stale
"KSD OVERTEMP"
Displayed
"COURSE DEVIATION
DATA OUT FAULT"
Displayed
"GLIDESLOPE
DEVIATION DATA OUT
FAULT" Displayed
"FPGA SPI BUS FAULT"
Displayed
"LIGHT SENSOR FAULT
MANUAL DIM REQ"
Display
NOTE 1: For directions how to retrieve the Event Log, refer to Section 6.3.1.
89000109-002
Rev 2
© Honeywell International Inc. Do not copy without express permission of Honeywell.
For Use in Non-Certified Aircraft

Table 8-3 C-BIT Failures Troubleshooting Chart

Fault Recorded
(NOTE 1)
"CBIT Heartbeat Fault"
"CBIT Over-Temperature
Fault"
"CBIT AFCS_CRS_ DEV
_OUT Loopback Fault"
"CBIT AFCS_CRS_ DEV
_FLAG_OUT Loopback
Fault"
"CBIT AFCS_GS_ DEV
_OUT Loopback Fault"
"CBIT AFCS_GS_ FLAG
_OUT Loopback Fault"
"CBIT FPGA SPI Bus
Fault"
"CBIT Light Sensor
Communication Fault"
Causes
KSD 100EXP Defective
KSD 100EXP Unit
Temperature Is Too
High
Data Mismatch
Data Corrupted
Data Mismatch
Data Corrupted
See "PBIT FPGA SPI Bus Fault" under ""Display
Hardware Error" on Screen" troubleshooting
procedure in Table 8-2 P-BIT Failures
Troubleshooting Chart.
See "PBIT Light Sensor Communication Fault"
under ""LIGHT SENSOR FAULT MANUAL DIM REQ"
Display" troubleshooting procedure in Table 8-2 P-
BIT Failures Troubleshooting Chart
xVue Touch Installation Manual
Corrective Action
• Reset KSD 100EXP
• If fault persists,
replace KSD 100EXP
• Turn KSD 100EXP off
to allow it to cool
down
• Check for adequate
ventilation
• Check airflow around
the KSD 100EXP for
any blockages
• Check Wiring from
Autopilot to KSD
100EXP
• Reset KSD 100EXP
• If fault persists,
replace KSD 100EXP
• Reset KSD 100EXP
• If fault persists,
replace KSD 100EXP
• Check Wiring from
Autopilot to KSD
100EXP
• Reset KSD 100EXP
• If fault persists,
replace KSD 100EXP
• Reset KSD 100EXP
• If fault persists,
replace KSD 100EXP
Page 8-6