IBM 3279 2A Maintenance Information page 29

3279 MIM Chapter 2. Maintenance Aids 2-8
2.6.2.3 Interactive Test
This test permits a visual display of the operation of
the keyboard, selector pen. and MR C with the
control unit or IDPA.
Action
1. Ensure that the A,a/ A
switch is set to A.a.
2. Move the cursor under the
C of the CK field.
3. Press the insert (II) key.
4. Press keys J K
L.
5. Press RESET.
6. Test the Sel Pen feature.
(You may simulate the Sel
Pen by using the cursor and
the cursor select key):
a. Touch the pen on ?SEL PEN
field on the second line.
(If )( -f appears in OIA,
press RESET and retry with
increased brightness.)
b. Repeat step a.
c. Touch the pen on >SEL PEN
field on the third line.
d. Repeat step c.
7. To test the MRC feature:
Move the cursor to the
first position in the
fifth line (line below
the test pattern), and
pass the MRC test card
through the reader.
Results
A
appears in the OIA.
)( *
>
appears in OIA and the field
in the fourth line becomes j k£K •
)( *
>
and
A
are erased.
The second line becomes: >SEL PEN SEL PEN
The second line becomes: ?SEL PEN SEL PEN
The third line becomes: &SEL PEN ?SEL PEN
The third line becomes: &SEL PEN >SEL PEN
If the read operation is successfUl, the cursor
moves a number of positions equal to the number
of characters on the MRC test card; the green
light on reader turns on, and )( -f is displayed
in the OIA.
If the read operation is unsuccessful, the red
light on the reader turns on; press the reset
key and repeat the test from Step 7.
Read MAP 0000 Page 2
Failure In
Then Go to MAP
Keyboard
0700 Entry Point A
Sel Pen
0800 Entry Point DO
MRC
0800 Entry Point EE