Xerox DocuPrint P1202 Service Manual page 114

Seven diagnostic tests (00, and 05 - 12) (Table 5.4.5b) require no additional equipment, and indicate
results in two ways: by LEDs (Column 5), and/or by obvious activity--sound or movement--as the printer
responds (Column 4).
The results of most tests are indicated by the three LEDs to the right of the readout window. Two of the
LEDs are labeled ON and OFF, and the third is unlabeled. However, these labels can be ignored when
reading results, since it is the pattern of lit LEDs which indicates test results.
For example, consider test 08, the test of the Feed and Exit Sensors. If the feed sensor circuit is working
properly, the "unlabeled" LED, and only that LED, will be lit when the Feed Sensor is actuated. If either of
the other two LEDs light, or if the "unlabeled" LED fails to light, the Feed Sensor circuit is not operating
properly.
Three of the thirteen tests (04, 05, and 10) are multiple tests. After the first test in the series is started by
pressing [ENTER], the remaining tests in the series are initiated by pressing the UP key, once in
succession for each remaining test.
Three of the thirteen (07, 08, 09) are tests involving sensors. Pressing [ENTER] starts the tests.
Manually actuating and deactuating the sensor verifies the operation.
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General Procedures and Information 5-26 Xerox DocuPrint P1202 Service Manual