Table of Contents
Advertisement
With P1 in the lower-vertical position and P2 in the
upper- vertical position, the display is narrower and
will not fill the screen when used on a Zenith computer.
Monitor Performance Tests
A Z-100 Series, Z-100 PC Series, or equivalent com-
puter is required for these tests.
FILL THE SCREEN TEST
The screen can be filled by using the Monitor ROM.
1. Turn on the computer.
2. Z-100:
When the hand prompt appears (you
may have to defeat the autoboot by
pressing the ESC key during the auto-
boot sequence to get this), press the
T key to obtain the test menu from the
Monitor ROM. If the test menu does
not appear and the computer beeps,
then the Monitor ROM is an early ver-
sion and does not contain the test
routines. In this situation, use the
BASIC program.
Z-100 PC: Press the CTRL, ALT, and INS keys
and then enter TEST and press RE-
TURN.
3. Select the Keyboard Test by pressing the 2 key.
4. Choose any character to fill the screen by pressing
it. The capital Z is recommended.
5. Check to see if the screen is filled with the test
character and if the width and height of the display
are correct.
6. Make any necessary adjustments (see Monitor
Alignments and Adjustments in this chapter).
Servicing
7. When you are finished using the display, press
the DELETE key to return to the test menu.
8. Press the 5 key to return to the hand prompt.
COLOR BAR TEST
The pattern will be eight different colors from the RGB
output connector of a Z -100 with color capability or
a gray scale (eight shades of a single color) from the
composite output connector of a Z-100 Low-Profile
Computer with color capability. A Z-100 that does not
have color capability will not produce a color bar or
gray scale. Instead, one side of the screen will be dark
and the other side will be light.
Use the color bar to determine if any of the color ad-
iustments have to be made (see Monitor Alignments
and Adjustments in this chapter).
1. Turn on the computer.
2. Z-100:
When the hand prompt appears,
press C to obtain the color bar pattern.
If the color bar pattern does not ap-
pear, then the Monitor ROM is an
early version and the BASIC program
in Listing 1 will have to be used.
NOTE: The autoboot may have to be
defeated by pressing the ESC key
during the autoboot sequence to get
the color bar pattern.)
Z-100 PC: Press the CTRL, ALT, and INS keys
simultaneously. Press the C key and
then the RETURN key.
3. The hand prompt will continue to be seen at the
bottom of the color bar.
4. When the necessary adjustments have been
made, press the DELETE key to return to the test
menu.
Page 4-9
Advertisement
Table of Contents
