HP 3150 Service Manual - Page 196

Other tests in extended service mode The chart below shows tests that can be performed in extended service mode and a brief explanation of each test: Table 16. Extended service mode tests Test Explanation Keypad test Tests all keypad keys by pressing in sequence. LCD test Tests the control panel display. Control panel test Tests the control panel lights Sensor states Shows current detector activation levels. The control panel display shows the percentage of time each detector is activated. All LCD characters Scrolls through the full list of control panel display characters. Scanner plots Tests and recalibrates the document scanner. Scanner LED After selecting this menu item, lift the document release door and verify that all of the LEDs in the contact image sensor are lit. ADF feed test Runs the document scanner pickup rollers once. ADF motor test Runs the document scanner motor. Individual diagnostics Run individual tests from the self-test sequence (see Table 15). Modem tone Generates tones with various frequencies from 300 Hz to 2425 Hz. Modem modulation Generates various fax identification signals. 194 Troubleshooting EN