F. Fault Isolation Procedure
(1)
Re-load the HGS software. To re-load the software, do this task: Software Installation with the PDL, AMM TASK 34-36-01-470-802.
(2)
Do the Repair Confirmation.
(3)
If fault message HCAC03 shows (combiner display FC03), then check the HUD computer program pin configuration (WDM 34-36-11, 34-36-12, 34-36).
(a) Repair any problems that you find.
(4)
Do the Repair Confirmation.
EFFECTIVITY SIL 004, 005, 017, 018 34-36 TASKS 801-851
D633A103-SIL BOEING PROPRIETARY -Copyright # Unpublished Work -See title page for details Page 204 Jun 15/2010
G. Repair Confirmation
(1) Do
this
task:
Head
Up
Display
BITE
Procedure,
34-36
TASK
801.
If fault message HC01, HC02, HCAC03, or HC04 do not show (combiner display FC01, FC02, FC03, or FC04), then you corrected fault.
-------------------------END OF TASK ---------------------------
803. HUD Computer Problems -Fault Isolation
A. Description
(1)
The task is for this HUD maintenance message:
(a) HC10 through HC5F show on the HUD control panel.
(2)
The HUD computer has an internal failure.
B. Possible Causes
(1) HUD computer.
C. Circuit Breakers
(1) These are the primary circuit breakers related to the fault:
CAPT Electrical System Panel, P18-2 Row Col Number Name C 1 C01622 HEAD UP DISPLAY ANNUN DC C 5 C01619 HEAD UP DISPLAY SYS NORMAL DC C 6 C01620 HEAD UP DISPLAY SYS ALTN DC
D. Related Data
(1)
(SSM 34-36).
(2)
(SSM 34-36-11).
(3)
(SSM 34-36-12).
(4)
(WDM 34-36).
(5)
(WDM 34-36-11).
(6)
(WDM 34-36-12).
E. Initial Evaluation
(1) Do
this
task:
Head
Up
Display
BITE
Procedure,
34-36
TASK
801.
(a)
If the HUD fault code shows on the control panel, then do the Fault Isolation Procedure below.
(b)
If the HUD fault code does not show, then there was an intermittent fault.
F. Fault Isolation Procedure
(1)
Replace the HUD computer (AMM PAGEBLOCK 34-36-01/401).
(2)
Do
this
task:
Head
Up
Display
BITE
Procedure,
34-36
TASK
801.
EFFECTIVITY SIL 004, 005, 017, 018 34-36 TASK 803
D633A103-SIL BOEING PROPRIETARY -Copyright # Unpublished Work -See title page for details Page 205 Jun 15/2010
(a) If the HUD fault code does not show, then you corrected the fault.
-------------------------END OF TASK ---------------------------
804. Overhead Unit (OHU) Problems -Fault Isolation
A. Description
(1)
The task is for this maintenance message:
(a) OHU60 through OHU7F show on the HUD control panel.
(2)
The overhead unit (OHU) has an internal failure.
(3)
This indicates the OHU has video deflection (voltage) problems or the OHU is inactive.
(a)
Fault code OHU60 means the HUD computer is not receiving any activity from the OHU.
(b)
The OHU receives signals from the computer. Fault codes OHU61 through OHU76 are all OHU faults. These fault codes may coincide with a combiner fault when ALIGNHUD or BRTCTL is shown on the combiner screen.
B. Possible Causes
(1) OHU or combiner.
C. Circuit Breakers
(1) These are the primary circuit breakers related to the fault:
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