NorthStar 951X Installation Manual page 42

SECTION TWO - Installing the unit
Table 2: Troubleshooting the installation (continued)
Problem Area Symptom
DISPLAY (cont'd) The display screen dims, either slightly or
more, after the unit has been on for a cer-
tain time.
SYSTEM Software-related:
System lock-ups
System locks up under certain conditions,
such as when configuring screens, routes,
waypoints, or tide data.
Displays error message
System always freezes at one particular
screen.
SYSTEM Hardware-related:
System lock-ups
The system locks up on a random basis with
no apparent pattern.
The system locks up when using a chart
card.
System fails any initial self-tests other than
ROM NO GOOD.
SYSTEM No GPS or DGPS
Configuration
Page 32
Possible Solutions/Reasons
•
•
•
ROM NO GOOD
.
•
•
•
•
•
•
951/952 INSTALLATION MANUAL Revision B
The unit may be implementing its
auto-dimming mode. Auto-dimming
helps maintain the integrity of the dis-
play and reduce power consumption
when the unit is on and running too
hot for its current environment. In this
case the display screen may dim to
half its intensity.
Install the latest software version; to
order, call the Northstar Service
Department.
Install the latest software version; to
order, call the Northstar Service
Department.
Internal software failure; call your
Northstar dealer or the Northstar Ser-
vice Department.
Internal hardware failure; call your
Northstar dealer or the Northstar Ser-
vice Department.
Possible bad chart card. Remove the
card, and inspect the pin area of the
card and the unit for damage. If the
pins in the unit are bent or damaged,
to prevent further damage, don't
insert another card. If you're sure that
the card pins aren't bent, try inserting
a new card.
Internal hardware failure; call your
Northstar dealer or the Northstar Ser-
vice Department.
Possible incorrect installation of the
AS110/AS105 splitter cables; they
may be reversed at the splitter for the
GPS and differential output ports.
For verification and troubleshooting of
the antenna system, see Table 3,
"Troubleshooting the GPS/DGPS
antenna installation," on page 35.