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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
2 KEYBOARD
3 TEST PATTERN 1
4 TEST PATTERN 2
Figure 12-2 SELF TEST menu