JRC JMR-92 Series Field Service Manual page 860

Symptom
The trackball does
cannot be moved
smoothly.
Although the power is
supplied and the screen
is displayed, the display
is frozen, disabling
processing to advance
up to display of the task
menu.
Some task menus
cannot be selected.
The cursor is not
displayed correctly.
Characters/symbols are
not displayed correctly.
Position information
(GPS) is not displayed.
Cause
The trackball is dirty.
The CCU (NDC-1590) is abnormal. Make a request to the distributor for
The device license has not been
installed.
The CCU (NDC-1590) is faulty.
The CCU (NDC-1590) is faulty.
The communication is not set
correctly.
The power supply for the GPS unit
is not turned on.
The GPS unit does not perform
positioning.
The connection with the GPS unit is
abnormal.
The power supply for the SLC
(CMH-2370) is not turned on.
(Case where the GPS unit is
connected to the SLC)
The SLC (CMH-2370) is faulty.
(Case where the GPS unit is
connected to the SLC)
The internal wiring is faulty.
The CCU (NDC-1590) is faulty.
7-37
Action
Clean the trackball.
repair.
Install the license of the device to be
used.
Make a request to the distributor for
repair.
Make a request to the distributor for
repair.
Set the communication correctly.
Turn on the power supply for the
GPS unit.
Check the state of the GPS unit.
Check the connection with the GPS
unit.
If a GPS unit is connected to the
SLC, check that the LED of the
corresponding port is lit during data
reception.
Turn on the power supply for the
SLC.
Make a request to the distributor for
repair.
Make a request to the distributor for
repair.
Make a request to the distributor for
repair.
Chapter 7 Troubleshooting