Epson EQUITY 386/33 PLUS - Manual (Page 144)

Note
Be sure to insert a blank diskette that has been formatted
before you run the Diskette format test. Then use that
diskette when you run any of the other destructive tests.
Check that you have inserted the correct diskette before you
press at the Proceed prompt.
You see the following prompt before the program performs a
test:
Diskette drive (A/B) ?
If necessary, type the drive identifier and press (If you
have only one diskette drive, drive A is already entered for
you.) Press and at the
Proceed
prompt to begin the
test. Press and to return to submenu.
Note
When you are finished running any of these tests on the test
diskette, you must reformat it before you can use it.
Floppy Disk Error Messages
The diagnostics program displays two types of error messages
while testing a diskette drive: messages the program generates
and those the controller generates.
The program may display the following error message during
the Disk change line test:
Warning - Change
line inoperational
This message appears if the line is not working properly and
may indicate a problem in the drive or its controller.
B-22 Performing System Diagnostics