Furuno GP-3300 - Manual (Page 119)

12-3
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
*ROM = OK
SRAM = OK
VRAM = OK
MEMORY CARD =
INTERNAL BATTERY = OK
CARD BATTERY =
SIO (DATA IN/OUT) = *2
SIO (AUTOPILOT) = *2
GPS = OK
PRESS ANY KEY TO EXIT.
UPPER
LOWER
UPPER
LOWER
OK
OK
OK
OK
Asterisk marks
item currently
being tested.
1* "NG" displayed when chart card is inserted.
*2 Special test connectors required to check "SIO."
*1
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.
Figure 12-4 Keyboard test display