Furuno GP-3300, GD-3300 Diagnostic Tests, Self test at power on, Memory circuits, I/O ports, 12-2

12.2 Diagnostic Tests

The display unit incorporates several diagnostic tests which check the system for proper operation.

Self test at power on

Each time you turn on the power all devices and the internal battery are checked for proper operation. The display shows the results of the check as OK (normal) or NG (No Good). In the sample results shown in Figure 12-1, all devices and the internal battery are operat- ing normally.

START UP TEST
ROM	= OK
SRAM	= OK
VRAM	= OK
INTERNAL BATTERY	= OK

Figure 12-1 Sample start up test results

If NG is shown for the internal battery, press any key, save display to a memory card, and then turn off the power. Request replacement of the internal battery.

Memory circuits, I/O ports

This test continuously checks the memory circuits and I/O ports. Fur- ther, it can check ROM and RAM cards for proper operation, by in- serting them before executing the test. (If no card(s) is inserted, NG appears as the results for the card check.)

1.Press the [MENU] key.

2.Press the [9] key to select MISC.

3.Press the [9] key to display the SELF TEST menu.

9-9 SELF TEST

1 MEMORY ∙ I/O PORT

2KEYBOARD

3TEST PATTERN 1

4TEST PATTERN 2

Figure 12-2 SELF TEST menu

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