Diagnostic Test - Furuno FR-2105 Operator's Manual

Echo stretch ineffective (Neither
ES1 nor ES2 is displayed)
Only 2 parallel index lines when
6 lines are wanted
Range rings are not displayed
Poor discrimination in range
True motion presentation not
working correctly
Target nor tracked correctly
6.3

Diagnostic Test

A diagnostic test program is provided to enable testing of major circuit boards in the radar
display unit. Note that the normal radar picture is lost during this test.
Proceed as follows to execute the diagnostic test:
Proceed as follows to execute the diagnostic test:
1. Press the RADAR MENU key to show the FUNCTIONS 1 menu.
2. Press the [0] key three times to show the FUNCTIONS 4 menu.
3. Press the key [3] to select menu item TEST. Then, press the ENTER key.
Program numbers appear. The diagnostic test is executed and the screen shows test results
as shown on the next page. OKs appear for normal operation. If NG (No good) appears,
corresponding components may be defective. Consult your dealer.
4. Small squares displayed at the right bottom of the test result screen are for testing the
control and keys on the operator control panel. As you operate these controls and keys,
corresponding squares are highlighted, indicating that your control/key operations are
properly recognized.
5. To terminate the diagnostic test, press STBY/TX key once or twice.
1 SPU board
1 Incorrect setting of index
line intervals
1 Adjust the brilliance of
range rings at the
BRILLIANCE 1 menu to
see if intensity is
increased.
2 SPU board
1 Sea clutter control not
functioning properly
1 Poor contact of MODE
key
2 Selection not accessed
3 Speed entry incorrect
4 TM display inaccurate
1 Poor definition of targets
in sea clutter
-6.4-
1 Replace SPU board.
1 Set index line interval referring to section
1.26.
1 Replace associated circuit board if
unsuccessful.
2 Replace SPU board.
1 Improper setting of A/C SEA control. If
A/C SEA is seen only at very close
range, suspect inaccurate frequency of
reference oscillator.
1 Try to press MODE key a little harder.
2 Press MODE key until TM appears.
3 Enter correct own ship speed referring to
section 1.24.
4 Make sure that speed and compass
inputs are accurate.
1 Adjust A/C SEA and A/C RAIN controls
referring to section 1.13 and 1.14.