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RUNNING DIAGNOSTICS
Before you run diagnostics, you'll need to put paper in your printer. Use two sheets so that
the paper covers the width of the platen, and turn on the printer. The On/Off switch is on
the front of the 620 printer (20 CPS) and on the back of the 630 printer (4-0 CPS).
As the test runs, you'll need to watch the screen for error messages. You may want to read
through the information below before you start the test to become familiar with the
messages.
PRESS
the RESET switch on the front of the printer.
PRESS
the RESET button on the back right corner of the screen.
REMOVE
any disks from the disk drives.
CHECK
the 820-11 Diagnostic Exerciser disk write protect tape (shown on page 15-
3). The 5Y4" disk should have no tape over the notch and the 8" disk should
have a tape in place.)
INSERT
the 820-11 Diagnostic Exerciser disk in the left disk drive (drive A) and
close the drive.
INSERT
an initialized disk in the right disk drive (drive B) and close the drive.
Note: The 820-11 Diagnostic Exerciser disk must be used to run the diagnostic test, if
you use the 820 Diagnostic Exerciser disk, a false error indication will occur.
TYPE
the letters LA and press the RETURN key.
The 820-11 Diagnostic Exerciser disk will begin to check out the sy'stem. Be careful
not to touch any keys on the keyboard while the test is running. Touching a key can
stop the test. Note:
If
there is an error during the test, holding down CTRL while
pressing C will run the remaining tests.
WATCH
the screen for the results of the first memory test. In about 30 seconds,
the screen should show:
PASSES COMPLETE
=
0001; COUNT OF ERROR BYTES
=
0000
PASSES COMPLETE
=
0001 ; COUNT OF ERROR BYTES
=
0000
If
the COUNT OF ERROR BYTES does not equal 0000, your system needs to be
serviced.
WATCH
the screen for the results of the second memory test. The screen
should show:
PASSES COMPLETE
=
0001 ; COUNT OF ERROR BYTES
=
0000
PASSES COMPLETE
=
0001 ; COUNT OF ERROR BYTES
=
0000
DIAGNOSTICS
15-5
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