Keyboard Test - Furuno GD-3300 Operator's Manual

4. Press the [1] key to select MEMORY•I/O PORT. Then, the unit
checks each memory circuit and I/O port one by one, displaying
the results after each checking each item.
9-9-1 MEMORY TEST
Asterisk marks
*ROM
item currently
SRAM
being tested.
VRAM
MEMORY CARD
INTERNAL BATTERY
CARD BATTERY
SIO (DATA IN/OUT)
SIO (AUTOPILOT)
GPS
PRESS ANY KEY TO EXIT.
1* "NG" displayed when chart card is inserted.
*2 Special test connectors required to check "SIO."
Figure 12-3 Sample memory circuit, I/O port test results display
5. To escape from the test, press any key.

Keyboard test

1. Press [MENU], [9], [9] and [2] to select KEYBOARD TEST.
The display should look like Figure 12-4.
9-9-2 KEYBOARD TEST
PRESS KEYS ONE BY ONE TO TEST.
PRESS CLR 3 TIMES TO RETURN TO MAIN MENU.
= OK
= OK
= OK
UPPER
=
LOWER
= OK
UPPER
=
LOWER
= *2
= *2
= OK
Figure 12-4 Keyboard test display
OK
*1
OK
OK
OK
12-3