9.1    FAULT FINDING 
9ņ4 
9 
y 
yyyy 
yyyy 
9.1.2    Operation Checking 
 
When the system is operating, the operation status (located at the upper right of the screen) is changing 
pictures. 
If picture freeze occurred, turn off the system and restart the system. 
 
Operation status
 
 
 
 
9.1.3    Fuse Checking 
 
Melted fuses are caused by any clear cause. When a fuse is replaced, it is necessary to check the related 
circuits even if there is no trouble. In checking, note that there is some dispersion in the fusing 
characteristics. Table 9-6 shows a list of fuses used in the equipment. 
 
 
Table 9-6    Fuse List 
Location  Parts No.  Current Rating  Type  Protection Circuit  Scanner Unit 
Radar processing circuit  F2  6.3A 
ST4-6.3AN1 
I/F circuit 
NKE-2043 (4kW) 
for 12V DC 
Radar processing circuit 
F2  3.15A 
ST4-3.15AN1 
I/F circuit 
NKE-2043 (4kW) 
for 12V DC 
Radar processing circuit 
F2  6.3A 
ST4-6.3AN1 
I/F circuit 
NKE-2063A(6kW) 
for 12V DC 
Radar processing circuit 
F2  3.15A 
ST4-3.15AN1 
I/F circuit 
NKE-2063A (6kW) 
for 24V DC 
Radar processing circuit  F3  5A  ST4-5AN1  I/F circuit  NKE-2063A(6kW) 
Radar processing circuit  F2  5A  ST4-5AN1  I/F circuit  NKE-2103 (10kw) 
Radar processing circuit  F3  10A  ST6-10AN1  I/F circuit  NKE-2103 (10kw) 
Radar processing circuit  F2  10A  ST6-10AN1  I/F circuit  NKE-2254 (25kw) 
Radar processing circuit  F3  10A  ST6-10AN1  I/F circuit  NKE-2254 (25kw)