16-11  Section 16 Failures and After-Sale Services 
 
 
 
 
 
 
Symptom  Cause  Action 
The trackball does 
cannot be moved 
smoothly. 
The trackball is dirty.  Clean the trackball. 
Although the power is 
supplied and the screen 
is displayed, the display 
is frozen, disabling 
display of the mode 
selection screen.   
The processing unit (NDC-1678) is 
abnormal.   
Make a request to the distributor for 
repair. 
Some menus cannot be 
selected on the mode 
selection screen.   
The device licence has not been 
installed. 
Request repair or additional 
arrangement to the supplier and 
install the licence.   
The cursor is not 
displayed correctly. 
The processing unit (NDC-1678) is 
faulty.   
Make a request to the distributor for 
repair. 
Characters/symbols are 
not displayed correctly. 
The processing unit (NDC-1678) is 
faulty.   
Make a request to the distributor for 
repair. 
Position information 
(GPS) is not displayed. 
 
The communication is not set 
correctly. 
Set the communication correctly. 
The power supply for the GPS 
equipment is not turned on. 
Turn on the power supply for the 
GPS equipment. 
The GPS equipment does not 
perform positioning. 
Check the state of the GPS 
equipment. 
The connection with the GPS 
equipment is abnormal. 
Check the connection with the GPS 
equipment. 
When GPS equipment is connected 
to the serial LAN interface circuit, 
check if the LED of the corresponding 
port is lit at data reception.   
The internal wiring is faulty. 
Make a request to the distributor for 
repair. 
The processing unit (NDC-1678) is 
faulty.   
Make a request to the distributor for 
repair. 
The power is not supplied to the 
serial LAN interface circuit 
(CMH-2370) inside of junction box 
NQE-1143. 
(Case where the GPS equipment is 
connected to junction box NQE-
Turn on the power supply for the 
serial-LAN interface circuit. 
The serial LAN interface circuit 
(CMH-2370) inside of junction box 
NQE-1143 is faulty. 
(Case where the GPS equipment is 
connected to 
circuit)   
Make a request to the distributor for 
repair.