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9. MAINTENANCE
9.11.4
Test pattern
The test pattern test checks for proper display of colors. Select [Test Pattern] from the
[Test] menu to do this test. Use the MODE key to change the test pattern.
9.12
How to Raise the Transducer from the Hull Unit
If the transducer cannot be raised with the switches on the control unit, because it is
tangled in the net or its shaft is bent, try to raise it from the hull unit, automatically or
manually, whichever works.
This procedure is intended for the service technician.
9.12.1
How to raise the transducer automatically
If the message "TRANSDUCER NOT RETRACTED" appears, and the transducer
cannot be retracted from the control unit, do as follows:
1. Check the LEDs on the hull unit.
When the L.SW_LED on the raise/lower control box flashes, the raise/lower func-
tion may be abnormal. Do the following steps to raise the transducer, then contact
your dealer. When you can not check the LEDs, go to step 2.
2. Turn off the switchboard, transceiver unit and hull unit from the ship's mains
breaker.
To force a system shut-down, press and hold the POWER ON (I) switch for ap-
prox. 10 seconds.
3. Check if the net or other object is caught in the transducer.
4. Look through the lid on the raise/lower control box in the hull unit to check if the
motor breaker is OFF. If it is midway between ON and OFF, open the lid and turn
it off and then on.
Note: From Step 5 to Step 7 is procedure for service technician.
9-16
PRESS MENU KEY TO QUIT TEST MODE.
PRESS MODE KEY TO CHANGE TEST PATTERN.
WHITE
BLACK
Black
RED
GREEN
BLUE
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