HP LaserJet Pro 400 Service Manual - Page 32

Post-service tests After service has been completed, perform the following tests to verify that the repair or replacement was successful. Test 1 (print-quality test) 1. Verify that you have completed the necessary reassembly steps. 2. Make sure that the input tray contains clean, unmarked paper. 3. Attach the power cable and interface cable, and then turn on the product. 4. Verify that the expected start-up sounds occur. 5. Print a configuration page, and then verify that the expected printing sounds occur. 6. Print a demo page, and then verify that the print quality is as expected. 7. Send a print job from the host computer, and then verify that the output meets expectations. 8. If necessary, restore any customer-specified settings. 9. Clean the outside of the product by using a damp cloth. Test 2 (copy-quality test) 1. Verify that you have completed the necessary reassembly steps. 2. Make sure that the input tray contains clean, unmarked paper. 3. Attach the power cable, and then turn on the product. 4. Verify that the expected start-up sounds occur. 5. Print a configuration page, and then verify that the expected printing sounds occur. 6. Place the configuration page in the document feeder. 7. Print a copy job, and then verify the results. 8. Clean the outside of the product by using a damp cloth. Test 3 (fax-quality test; fax models only) 1. Place the configuration page in the document feeder. 2. Type a valid fax number and send the fax job. 3. Verify that the send quality and receive quality meet expectations. 6 Chapter 1 Removal and replacement ENWW