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7.4 Display Unit Test
This test checks the ROM, RAM and keyboard for proper op-
eration.
1. Turn on the power while pressing and holding down the
MENU key. Release the MENU key when you hear a beep.
The SYSTEM menu appears as shown below.
**
SYSTEM MENU
SYSTEM SETTING
RANGE - SONAR MODE
RANGE - VERTICAL FAN MODE
RANGE/SHIFT - E/S
COLOR
LANGUAGE
DISPLAY TEST1 - ROM/RAM/KEY
TRAIN/TILT TEST
SCREEN ADJUSTMENT
TEST PATTERN
DISPLAY TEST2 - OPERATION
DEFAULT
EXIT: TURN OFF THE UNIT
Figure 7-2 System menu
2. Select DISPLAY TEST1 - ROM/RAM/ KEY with the arrow
keys on the sub panel 2.
3. Press the MENU key to start the test. The program no., Tx
frequency, and pitch and roll angles are displayed, and the
ROM, RAM, SI/O are checked.
4. Operate each key and control on the main panel, sub panel
and remote control box. A pressed key's on-screen indica-
tion changes to 1 when the key is pressed; 0 when it is
released.
5. To return to the SYSTEM menu, press the MENU key again.
6. To quit, reset the power.
**
7-3
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