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Chapter 2 Service
Troubleshooting the Counter
2-50 Assembly-Level Service Guide
2
To Run the Individual Self Tests
1 Press and hold Recall (Utility) key, then cycle POWER key.
NOTE
If power does not cycle or the display does not light, go to the section titled
“Power Supply Check” on page 2-45 of this chapter.
2Press Recall (Utility) key until
TEST LOOP:
is displayed.
3 Ensure that
TEST LOOP:OFF
is displayed.
Note that the DISP? and KEYPAD? tests are not available if
TEST LOOP:
is
ON
.
If
TEST LOOP: ON
is displayed, press any one of the arrow keys to set
TEST LOOP
to
OFF
.
4Press Recall (Utility) key until
TEST: ALL?
is displayed.
5 Press any one of the arrow keys to select the desired self test
(for example, the
DISP?
self test).
6Press Enter key to start the test.
After a test is completed, a pass or fail message will be displayed.
NOTE
After the DISP? (Display) test has cycled through each display segment
and annunciator, press the Enter key to stop the test and to display the
pass or fail message.
7 If you are asked to do something, press Enter key when you have
completed the requested task.
After a test is completed, a pass or fail message will be displayed.