Keyboard Check 20 - IBM 3270 Maintenance Manual

Keyboard Check 20
If a 3XX or 03XX error is present, record the
error message exactly as it is shown on the
screen. This information is required to use the
error code chart on page 3-20-5.
XXXKB OK
0303
IS A POST 0303 ERROR DISPLAYED?
YES Replace the keyboard/timer adapter. See
Section 5, "Removal/Replacement and
Adjustments. "
NO
October
1984 3-20-1