Flash Technology VANGUARD FTS 370d, Reference Manual

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80 Revision 10 – 1/09/2015 FTS 370d/w/r
Table 5-5 – Troubleshooting – Marker Interface Box
Step Check/Test/Action Action
5.a Is the correct voltage present at TB1 in the Marker
Interface box?
Measure at TB1 DC+ & DC- (60 VDC). Yes
No Go to Step 5.b
Check flashhead cable between
SC 370 and Marker Interface
Box.
5.b Are any marker alarm indicators (1-4) lit on the
marker interface PCB located in the marker
junction box? Yes
No Go to Step 5.e
Go to Step 5.c
5.c Is the correct voltage present on J5?
Measure at J5 DC+ & DC- (60 VDC). Yes
No Go to Step 5.d
Check/repair wiring between TB1
and the marker interface PCB.
5.d Are the operational voltage status LEDs lit on the
marker interface PCB?
See Figure 1-7 for location. Yes
No Go to Step 5.e
Replace the marker interface
PCB.
5.e Is the correct voltage present on the output(s) for
the failed marker(s)?
Measure DC+ to DC- (24 VDC) on the marker
output(s) (J1 – J4) corresponding to the Marker
Alarm (1-4). Yes
No
Check wiring for an open
connection. Replace LED
marker fixture(s) if no wiring fault
is found.
Go to Step 5.f
5.f Is the correct voltage present on the output(s) for
the failed marker(s) with the marker connections
(J1-J4) disconnected from the marker interface
board?
With the system powered down, unplug the marker
connections (J1 – J4) from the marker interface
board. Apply power to the system and measure
DC+ to DC- (24 VDC) on the marker output(s) (J1
– J4). Yes
No.
Check marker output wiring for a
possible short. Replace marker
fixture(s) and wiring if necessary.
Replace the marker interface
PCB.
Table 5-6 – Troubleshooting – GPS Synchronization
Step Check/Test/Action Action
6.a Are there any obstructions that could block the
GPS antenna from receiving satellite signal? Yes
No
Remove obstruction(s) or
relocate the GPS antenna.
Go to step 6.b.
6.b Is the “Ant. Open” or “Ant. Short” LED lit on PCB
3?
Both LED’s are located in the GPS section of
PCB3 (see Figure 1-5). Yes
No
Inspect antenna cable. Replace
cable and/or antenna if
necessary.
Go to Step 6.c
6.c Does “GPS Comm.” show “Fault”?
Navigate through the Information Display to “GPS”
in the “Local Diagnostics” menu (See Section3). Yes
No Replace PCB 3
Go to Step 6.d
6.d Are at least 3 satellites visible to the controller?
Navigate through the Information Display to “GPS”
in the Local Diagnostics menu (See Section3). Yes
No Replace PCB3
Reposition antenna.
Note: Table 5-6 is written with the assumption that “Status: GPS Alarm” is present on the unit
programmed as System 1.