Furuno FR-8062 Operator's Manual page 94

Problem
Range changed but
radar picture does not
change
Interference rejector
is not working (inter-
ference rejection
level not displayed)
Echo stretch is not
working (Neither
ES1, ES2 or ES3 is
displayed)
Range rings are not
displayed
Poor discrimination in
range
True motion presen-
tation not working
properly
Target not tracked
correctly
Advanced-level troubleshooting
Probable cause or
check points
1) Defective range key
2) SPU board
3) Video freeze-up
1) SPU Board
1) SPU Board
1) Adjust their brilliance on the
Brill/Color menu.
2) SPU Board
Sea clutter control not func-
tioning properly
1) Poor contact of MODE key.
2) TM display accurate
Poor definition of targets in sea
clutter
6. MAINTENANCE & TROUBLESHOOTING
Remedy
1) Try to operate the RANGE key. If unsuc-
cessful, replacement of the keypad may
be necessary.
2) Replace SPU board.
3) Turn radar off and on.
1) Replace SPU Board.
1) SPU Board
1) Replace associated circuit board if unsuc-
cessful.
2) Replace SPU Board.
Improper adjustment of SEA control.
1) Try to press the key a little harder.
2) Make sure that speed and compass
inputs are accurate.
Adjust SEA and RAIN controls.
6-7