IBM 3270 Maintenance Manual page 161

The failing 64/256KB Memory Expansion Option
is the one with the switch settings that match
those for your error code.
When the sixth and seventh characters of the
error code are 00, 01, 02, 04, 08, 10, 20, 40, or 80,
the failure is one of the 64K memory modules.
ENTER THE NUMBER(S) OF OPTIONS TO TEST
OR PRESS ENTER TO SELECT ALL OPTIONS
?2
TESTING - XXXKB MEMORY
THIS TEST TAKES UP TO TWO MINUTES
PLEASE STAND BY
XX:XX:XX
ERROR - XXXKB MEMORY 201 SVV
FAILING ADDRESS - SPACE/MODULE XXXXX XX ««I!@jp-----
PRESS ENTER TO CONTINUE
ARE THE SIXTH AND SEVENTH
CHARACTERSOF·THE.ERROR CODE 00,01,
02, 04 08, 10, 20, 40, OR 80?
NO
Go to page 3-200-19.
YES
3-200-36 Maintenance Information