Light pen check, D-20 – Epson 10020 User Manual

Page 177

If all eight pages are correct, press Y and

Enter.

any page is

filled with an incorrect number, press N and Enter co display

the error message.

Light Pen Check

To check the function of a light pen connected to the color

graphics adapter card, press

and then

Enter.

This test checks

that a light pen connected to the color graphics adapter is
performing accurately. When you select this check, you see

these prompts:

Enter Y to start light pen check.

Enter N to return to the menu.

If you do not have a light pen attached,

press N

and

Enter.

T o

begin the test, press Y and

Enter. You see this

prompt:

PLACE LIGHT PEN ON CENTER OF WHITE BLOCK

Touch the center of the white block on the screen with the

light pen. When the light pen is correctly positioned, the block
moves to another part of the screen for a second teat. After
three successful tests, the check ends.

An error occurs if:

The light pen is not connected properly

You touch the screen at the wrong point

The light pen is malfunctioning

You do not touch the square within a certain amount of
time (which is dependent on the current CPU speed).

D-20

Performing System Diagnostics