IBM 3270 Maintenance Manual page 197

Keyboard Diagnostic Error Codes
Error Code Corrective Action
301
Replace
Keyboard/Timer
Adapter
304-311
Replace the
Keyboard
312-316
Replace
Keyboard/Timer
Adapter
317-319
Replace Keyboard
320-321
Rerun the program
and verify the
operator actions.
If
the same error occurs
replace the keyboard.
322
Go to "Continuity
Check" on
page 3-300-15.
323-326
Replace
Keyboard/Timer
Adapter
332-333
Replace
Keyboard/Timer
Adapter
334-343
Replace
Keyboard/Timer
Adapter
344-366
Replace the device
attached to the serial
port.
3-300-14 Maintenance Information