Online Tests (Ol Ts) - IBM 3277 Troubleshooting Manual

3. Press TEST REQ key. INPUT INHIBITED indicator
should come on.
4. The desired pattern shoUld appear within 15 seconds. If
iNPUT INHIBITED indicator slays on and the pattern
does not appear, proceed as follows:
a. Repeat the request while ensuring that steps 1-3 are
performed correctiy.
b. Check that the operating system and the BTAM
application program are stili executing.
c. Check that the BTAM application program is set up
for online test reQuests. (The customer's system
programmer can provide this information.)
2.2.3 Online Tests (OL Ts)
Online tests may be available, at the customer's option, to
aid in maintaining 3277 Display Stations. Detailed descrip-
tions and instructions for using OL Ts are contained in the
diagnostic program binder that is shipped with each control
unit. Control unit ML TGs also contain this information.
Most OL T routines apply to control units. The following
three routines apply to display stations:
1. KEY - This routine handles manually generated inter-
rupts from the keyboard, selector light-pen, and program
function keyboard. The results of the interrupts are
presented on the display station screen, informing the
CE of the success or failure of the interrupt operation.
Th is routine also reads back data entered from the
keyboard to check lowercase character codes.
2. MAG - This routine tests the operator identification card
reader and identification cards.
3. PAT - This routine displays the test patterns described in
paragraph 2.2.1. The 'test patterns appear in sequence on
the CRT after they are initially called in. An explanatory
message containing instructions for running the test
pattern sequence precedes Test Pattern 1.
Tools and Diagnostic Programs 2-9