Checking The Display Specification; Test Pattern Sequence - Wyse WY-120 Maintenance Manual

Section 3
7 Call the font size/character attribute test pattern by
simultaneously pressing
I
Ctrl
I
and
m .
8 Press
I
Enter
I
to return to the "walking" RAM character test
screen.
Figure 3-1 shows the test pattern sequence for both 60-Hz and
78-Hz modes.
Figure 3-1 Test Pattern Sequence
SELF TEST
"Walking" RAM
Character Test
I
Spacebar
I
60 Hz
l
•
"m" Pattern
Pincushion
Pattern
Attribute
Pattern
(80 Column)
CHECKING THE DISPLAY
SPECIFICATION
--
78 Hz
132 Column
j_
"m" Pattern
Pincushion
Pattern
Attribute
Pattern
(80 Column)
132 Column
1 Bring up the pincushion test pattern (Figure 3-2). For
instructions, see "Setting Up the Test Patterns."
2 Measure the margins on the top, bottom, and both sides of
the pincushion test pattern. Each margin should measure 11
mm ±2 mm. If you have a reticle, see Appendix A for
instructions.
3-3