IBM 3274 User Manual page 103

Procedure 11: IML Check
Notes:
1.
Pressing the IML pushbutton causes an interruption and
temporarily disables all displays attached to the 3274. If any
attached displays are in use, notify all operators before
proceeding.
2. Never attach a printer, an IBM 3270 Personal Computer
Attachment, or a 3290 display to port
O.
3. If the 3274 is locally attached, the Power/Interface switch
must be placed in the Local/Offline position and the
Local/Offline indicator must be lit. (If the Local/Offline
indicator does not light, record this fact on the
3274
Problem
Report Form, GX23-0203, and request appropriate service.)
Press and hold the IML pushbutton.
001
Do the
8 4 2
1 indicators light?
Y N
003
I
002
Record the status of the
8421
indicators on the 3274
Problem Report Form,
GX23-0203,
and request appropriate
service.
While observing the 8 4 2 1 indicators, release the IML
pushbutton.
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