User manual HP LASERJET 1000

[. . . ] hp LaserJet 1000 series service hp LaserJet 1000 series printer service Copyright Information © 2001 Hewlett-Packard Company All Rights Reserved. Reproduction, adaptations, or translation without prior written permission is prohibited except as allowed under copyright laws. Part number Q1342-90901 First edition, August 2001 Printed in USA Trademark Credits Microsoft, Windows, and MSDOS are U. S. registered trademarks of Microsoft Corporation. [. . . ] See "ECU pan" on page 56. Note Do not remove the gear shield instead of the right plate assembly. The gear shield retains some of the gears. Removing the gear shield can cause loose gears and springs to be misplaced. 2 3 4 Unwind the optic paper sensor and solenoid cables from the cable guides (callout 1) on the paper-feed mechanism. If necessary, remove one screw (callout 2) from the paper sensor PCB assembly and remove the sensor PCB. Remove the two mounting screws (callout 3) from the paper-feed mechanism. 2 3 2 1 Figure 49. Remove wire harnesses 60 Chapter 2 - Removal and replacement Q1342-90910 5 Apply slight pressure to disengage the paper-feed assembly bushings from the roller shaft (callout 4). Lift the paper-feed assembly up and out of the printer. 2 4 2 6 2 5 Figure 50. Hint Remove the paper-feed assembly When replacing the paper feed assembly, insert the two tabs (callout 5) on the paper-feed assembly into the provided recesses (callout 6) near the roller. Insert the bottom of the sensor flag into the hole in front of the paper-feed roller shaft and verify that the sensor flag moves freely. Q1342-90910 Bottom assemblies 61 6 7 Use needle-nose pliers to push the two tabs away from the end of the paper-feed roller shaft. Pull the paper-feed roller shaft away from the gear end and remove it. Figure 51. Release the paper-feed roller 62 Chapter 2 - Removal and replacement Q1342-90910 3 Troubleshooting Chapter contents Basic troubleshooting . 88 Q1342-90910 Chapter contents 63 Basic troubleshooting Table 7. Basic troubleshooting # Verification steps Does the printer turn on successfully? When the product is connected to a grounded power source, the printer motor should continuously rotate for about six seconds. Possible problems Power is not being supplied to the printer. There are pinched or frayed wire harness wires. The motor or ECU has failed. Solutions 1. Verify that the power cable is functional and the cable is plugged into the correct power source (110 V or 220 V ac). Verify that FU102 (the ECU PCB fuse) on the ECU is not open. Verify that the fuser levers are in the up position. Verify that the motor connector is seated into the ECU. Verify that the motor is correctly mounted on the printer chassis. Check for and replace pinched or frayed wire harness wires. The engine-test was successful. 1 2 Do engine tests print? Print an engine test. (See page 79. )The engine test should print without paper-feed problems or print-quality problems. The printed page is filled with evenly spaced horizontal lines (approximately 1 mm apart). [. . . ] Parts that have no reference designator or part number are not fieldreplaceable units and cannot be ordered. While looking for a part number, pay careful attention to the voltage listed in the description column to make sure that the part number selected is for the correct printer model. Common hardware The printer has three common fasteners. See table 18 for a description of these screw types. Common fasteners Example Description Screw, machine, truss head Screw, star Screw, self-tapping Hint The left-cover retaining screw is slightly longer than similar screws used in the printer. [. . . ]