HP 3015 Service Manual - Page 254
To perform other checks
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2. Open the print cartridge door after the paper advances halfway through the printer (about 5 seconds after the motor begins rotation). 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 imageformation process are functioning (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 is present 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 .) 3. Perform a high-voltage power-supply check. (See High-voltage contacts check.) 236 Chapter 6 Troubleshooting ENWW