HP C7769B Service Manual - Page 81
Enter, If This Test Passes, Do Not Replace The Drive, Roller Encoder-sensor.
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Service Tests and Utilities 3 If the test fails while checking the Paper-Axis Motor, then the following message will be displayed: Paper Advance test System error 41:10 Paper-axis motor failed In this case, to resolve the problem, replace the Paper-Axis Motor ⇒ Page 8-84. 4 If the Paper-Axis Motor test passes, the Printer will try to read the Drive Roller Encoder-Sensor while moving the Paper-Axis Motor. If the Printer can read the signals from the Encoder-Sensor, then the test has passed and the following message will be displayed (press Enter to continue to the next stage of the test): Paper Advance test Menu Roller encoder sensor test passed. Press ENTER to continue Back Enter WARNING IF THIS TEST PASSES, DO NOT REPLACE THE DRIVE ROLLER ENCODER-SENSOR. 5 If the Printer has problems reading the signal from the Drive Roller Encoder-Sensor, then the test has failed and the following message will be displayed: Paper Advance test System error 56:10 Roller encoder sensor failed In this case, to resolve the problem, replace the Drive Roller Encoder Sensor ⇒ Page 8-38. HP DesignJets 500 and 800 Series Printers Service Manual 4-11