HP 750c Service Manual - Page 136

12 Nozzle Print Test ' page 8Ć32 The purpose of this test is to check if the cartridge nozzles function correctly. 13 Mono PQ Plot ' page 8Ć33 The purpose of this test is to check the print quality in monochrome at 600 dpi. 750C 14 Color PQ Plot ' page 8Ć34 750C Plus The purpose of this test is to check the line attributes in color. 755 CM 15 Area fill PQ Plot ' page 8Ć35 The purpose of this test is to check the performance between the ink and the media using area fills and to validate the media settings. 16 Pen Nozzle Detect ' page 8Ć36 The purpose of this test is to check the functionality of all the nozzles of the cartridges. 17 Drop Detector ' page 8Ć37 The purpose of this test is to: D Check the test signal. D Check if the drop detector is sensing ghost drops due to noise interference. D Verify that the drop detector senses correctly. 18 Edge Detect ' page 8Ć39 The purpose of this test is to verify the operation of the line sensor. 19 Pen Alignment ' page 8Ć40 The purpose of this test is to perform the pen alignment. 20 Ortho Wiper ' page 8Ć41 The purpose of this test is to check that the ortho wiper functions correctly. 21 Primer Test ' page 8Ć42 The purpose of this test is to: D Check if the primer sensor can initialize the primer motor. D Verify the ability of the primer to select individual cartridges and to prime them. 22 X Motion Control ' page 8Ć43 The purpose of this test is to determine the power required to move the drive roller. 23 Mark Position ' page 8Ć44 The purpose of this test is to verify that the mark encoder is detected. 8-18 Troubleshooting C4705-90000