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.
2 Press 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.
4 Press 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).
6 Press 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.
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