IBM 3270 Maintenance Manual page 168

You have only 64/256KB Memory Expansion
Options.
1. Use the table below to find the first character
of your error code and the corresponding
switch settings.
2.
Compare these switch settings with those of
all the 64/256KB Memory Expansion
Option(s) in your system unit. The failing
option is the one with the switch settings that
match those in the table.
First Character
of Error Code
iJ~, 5,6,
or
7
8or9
64/256KB
Expansion Option
Switch Settings
1 2 3 4
On Off On On
Off On On On
5-8
N/A
N/A
DOES YOUR SYSTEM HAVE A 64/256KB
MEMORY OPTION WITH SWITCH
SETTINGS THAT MATCH THOSE OF YOUR
ERROR CODE?
NO Compare your switch settings with the
switch settings in the chart above. Make
the necessary corrections, and go to page
3-200-1 and follow the PIC again.
YES
October 1984 3-200-43