3.3Diagnostic test
The
LED/KEY/ROM/RAM test
1.Disconnect the power cable from the equip- ment.
2.While pressing the [AUTO] key, reattach the power cable.
The test sequence is as below.
AUTO TRUE CALIB STATUS
LED lights one by one from the
Blink twice.
All LEDs go off.
: On
: Blinking
: Off
Figure 22 Sequence of LED test
3. Press each key one by one.
LED corresponding to the key lights if the key is normal.
[AUTO] key: AUTO LED
[TRUE] key: TRUE LED
CALIB LED | |
[+] key: | STATUS LED |
4.Press the [AUTO] and [TRUE] keys to- gether more than two seconds after check- ing all keys. Then, the ROM and RAM are checked.
AUTO LED lights: RAM is normal.
TRUE LED lights: ROM is normal.
5.Press the [AUTO] and [TRUE] keys to- gether more than two seconds to escape from the test. The STATUS LED blinks while the equipment is being calibrated and lights when the calibration is completed (re- turn to normal mode). Do not operate the sensor while the LED is blinking; calibra- tion will be incomplete.
EEPROM/Sensor test
This test checks the EEPROM and sensor. All default settings (navigation setting, output sen- tence, output interval, etc.) are restored at the completion of the test. Do this test after dis- mounting the equipment.
1.Disconnect the power cable off from the equipment.
2.While pressing the [TRUE] key, reattach the cable. All LEDs go off.
3.After AUTO LED lights, turn the equipment through a circle slowly instead of ship's movement until TRUE LED lights. The test proceeds in the sequence shown below.
When the equipment finds error, LEDs do not light.
AUTO TRUE CALIB STATUS
Start
EEPROM:
OK
Mag. sensor: OK
Angle sensor: OK
Rate sensor: OK
: On (normal)
: Off (error)
Figure 23 EEPROM/Sensortest sequence
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