Test Pattern - IBM 3151 Manual To Operations

Using the Test Pattern
Test Pattern
The test pattern is used to help identify video element and keyboard problems.
When you press and hold the
etrl
and
Shift
keys, then press the
Hold
key, the test
pattern appears.
4
3
0123456789
ABCDEFGHIJKLMNOPQRSTUVWXYZ
abcdefghijklmnopqrstuvwxyz
AAAAAAAA
~
CCCCCCCC DDDDDDDD EEEEEEEE
~
i
~
10111111 10111111
•
0 0000
o
0 0 0
o
000 000
0000000000000
ElO 000
o
0 00
0 000000000000 0 000 0000
0 00000000000 ElO 0000
DB
0000000000
EIJ
0
o
0 0 0
0 0
0
0 0 000
BOGEl
TEST
(013,015)
1a
1b
2
1. High-intensity check pattern
la: These characters are brighter than others.
Ib: These characters blink.
2. Key-to-display test pattern
This pattern represents the keyboard keys. Boxes marked by
asterisks (*) are not changed and are dependent on the keyboard
type.
Note: If you are using the Model 11, the test pattern that
represents the numeric keypad is not displayed.
3. Cursor function test pattern
The cursor is block style.
Chapter 5. Solving Problems
5-17