
Troubleshooting document for Hp Laserjet 4345mfp printer series, contain gude to Resolving control-panel messages, SCANNER TESTS in the DIAGNOSTICS menu to test this motor. See Scanner tests. Run the ADF input motor test and the ADF input motor reverse test. You can use the MANUAL SENSOR TEST to test the operation of this switch (SW102). See Manual sensor test. In the diagnostic test, this switch is represented by the letter “S.” If the control-panel display shows “S3,” then A4-size media is installed, “S5” indicates that letter-size media is installed, and “S7” indicates that no tray is installed. The Digital Sending Service at

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