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Cleaning Procedure
WARNING: Be sure that the monitor's power cable is un-
plugged before cleaning.
•
Clean the cabinet with a lint-free cloth, lightly dam-
pened and with a mild cleaning solution; do not
spray liquids directly on the monitor or use a wet,
saturated cloth.
•
•
Clean the monitor's screen with a good quality glass
cleaner.
Be sure that the monitor is completely dry before ap-
plying electrical power.
Performance Tests
A Zenith Z-100, Z-100 PC, or equivalent computer is re-
quired 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 version
and does not contain the test routines.
In this situation, use the BASIC pro-
gram.
Z-100 PC:
Press the CTRL, ALT, and INS keys
and then enter "TEST" and press RE-
TURN.
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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 char-
acter and if the width and height of the display are
correct.
6.
Make any necessary adjustments (see Alignments
and Adjustments in this section).
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 out-
put connector of a Z-100 with color capaf>ility 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 capabil-
ity 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 adjust-
ments have to be made. (See Alignments and Adjustments
in this section.)
1.
2.
Turn on the computer.
Z-100:
When the hand prompt appears, press
C to obtain the color bar pattem. If the
color bar pattern does not appear, 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 dur-
ing 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.
Servicing
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Troubleshooting
