TB 11-5825-291-30
APPENDIX B
PLGR RTOK PROCEDURES
Introduction
There are several conditions that can make the PLGR appear to be malfunctioning when
in fact it is operating properly. If returned for repair, these units represent an
unnecessary cost to the PLGR program and the user. The PLGR should be reviewed for
the following common problems before returning the unit for repair. For a complete list
of common problems, check with the PLGR Technical Information Bulletin (TIB), TB 11-
5825-291-13-1.
Low Memory Battery:
While there are some valid failure modes for this problem, it's always a good idea to
check the memory battery. The battery that should be used is a3.6 volt lithium battery
which is identical to a AA battery. Its common for a returned PLGR to contain a AA
battery. To inspect for the wrong memory battery, first install a prime battery or apply
external power to the PLGR. This will preserve the fault logs if the failure is valid.
Remove the memory battery and look for the value printed on the battery. If it is not
3.6V, replace with the correct battery. If the battery is 3.6V, replace with a new one. If
the unit is on, turn it off by pressing the OFF key twice. Turn the PLGR back on and
watch the screen as the PLGR powers up. If the PLGR displays a message about the
memory battery being low, it is a valid failure and should be returned to for replacement.
If the LOW MEM BATT screen does not appear, then no failures exist with the memory
battery.
PLGR Won't Turn Off
This problem is characterized by the PLGR turning itself on after having been shut off.
This is almost never a true error. There is an AUTOMARK feature in the PLGR menu
that can inadvertently get turned on. This will cause the PLGR to power up after a
period of time to get a position fix. By going into the SETUP menu and paging through
until the AUTOMARK page is reached, the AUTOMARK function can be turned off. Set
the AUTOMARK mode to OFF, being sure to exit the screen properly so the change is
saved.
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