40:20 Maintenance - IBM 4381 Manual

A local/remote switch function is also supported for ROCF when the optional
keylock feature is present on the operator console display for the 4381 Processor.
When the 4381 operator console is locked, its keyboard is disabled and the screen
remains blank. Console input can be entered into the 4381 Processor only via the
ROCF console at the host location when the ROCF line is active. In addition, the
screen of the 4381 Processor operator console remains blank. Any messages for
the operator console are sent to the console of the host location, if one is
connected.
When the 4381 operator console is unlocked, console input to the 4381 Processor
can be entered via the 4381 operator console and the console at the host location,
if a console is connected. Messages to the console are displayed on the 4381
operator console and the console at the host location, if a console is connected.
40:20 Maintenance
The IBM 32 78 Model 2A Display Console Problem Determination Guide
(GA23-0020), 3279 Color Display Station Problem Determination Guide
(GA33-3094), or 3205 Color Display Console Operator Reference and Problem
Determination Guide (GA18-2399), depending on the type of console installed, is
provided with each 4381 Processor. These guides contain problem determination
and abbreviated operating and reference information. The IBM 4381 Processor
Operations Manual (GA24-3949) also contains problem determination procedures.
If the operator console malfunctions, the operator can take the steps outlined in the
guides before calling the customer engineer.
Section 40: Operator Console
93