HP LaserJet 3052 Service Manual - Page 268
To perform a half self-test check, To perform other checks, Drum-rotation functional check
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To perform a half self-test check 1. Print a self-test page. (See Troubleshooting tools on page 259.) 2. Open the print-cartridge door after the paper advances halfway through the printer (about 5 seconds after the motor begins to rotate). The leading edge of the paper should have advanced past the print cartridge. 3. Remove the print cartridge. 4. Open the print cartridge drum shield to view the drum surface. If a dark and distinct toner image is present on the drum surface, assume that the first three functions of the image-formation process are functioning correctly (through the development stage). Troubleshoot the failure as a transfer or fusing problem. To perform other checks If, during the half self-test check, no image appears on the photosensitive drum, perform these checks: 1. Make sure that you removed the entire length of the sealing tape from the print cartridge before you installed the cartridge. 2. Perform a drum-rotation functional check. (See Drum-rotation functional check on page 248.) 3. Perform a high-voltage power-supply check. (See High-voltage contacts check on page 249.) If the issue is a transfer problem, replace the transfer roller. If the issue is a fuser problem, check the two wire-harness connectors (J102 and J204; callout 1) on the power supply. Drum-rotation functional check The photosensitive drum, located in the print cartridge, must rotate in order for the print process to work. The photosensitive drum receives its drive from the main drive assembly. NOTE This test is especially important if refilled print cartridges have been used. 1. Open the print-cartridge door. 2. Remove the print cartridge. 3. Mark the drive gear on the cartridge with a felt-tipped marker. Note the position of the mark. 4. Install the print cartridge and close the print-cartridge door. The startup sequence should rotate the drum enough to move the mark. 5. Open the print-cartridge door and inspect the gear that was marked in step 3. Verify that the mark moved. If the mark did not move, inspect the main drive assembly to make sure that it is meshing with the printcartridge gears. If the drive gears appear functional and the drum does not move, replace the print cartridge. 248 Chapter 6 Troubleshooting ENWW