IBM 3270 Maintenance Manual page 159

If the first character of the error code is 4 or 5,
the failure is on the 128KB Memory-Printer
Adapter.
TESTING - XXXKB MEMORY
THIS TEST TAKES UP TO TWO MINUTES
PLEASE STAN D BY
XX:XX:XX
I
ERROR - XXXKB MEMORY 201 S
t
FAILING ADDRESS - SPACE/MODULE XXXXX XX
PRESS ENTER TO CONTINUE
IS THE FIRST CHARACTER OF YOUR
ERROR CODE A 4 or 5?
YES Replace the 128KB Memory-Printer
Adapter and rerun the diagnostics (see
page 3-200-55).
NO
3-200-34 Maintenance Information