HP 4300 Service Manual - Page 310
Ep Motor Rotation Error, Printer Error, Tray 3 Lifter Motor Failure, Replace The Ep Motor. See
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Table 42. Numerical printer messages (continued) Message Description Action 59.4 EP MOTOR ROTATION ERROR (LJ 4300 only) The print-cartridge drive motor (LJ 4300 only) is not functioning properly. 1. Turn the printer off and then on. 2. Replace the print cartridge. 3. Reconnect the EP-motor wire-harness on the DC controller PCA (location J86). 4. Replace the EP motor. See "Print-cartridge motor (HP LaserJet 4300 series printer only)" on page 175. 5. Replace the DC controller PCA. See "DC controller PCA" on page 181. 60.2 PRINTER ERROR The tray 2 lifter-motor is not functioning. 1. Turn the printer off and then on. 2. If the error persists. turn the printer off. 3. Verify that the tray 2 lifter wire-harness is full seated in its connector on the DC controller PCA (location J93). 4. Replace the tray 2 lifter-driver assembly. See "Tray 2 lifterdrive assembly" on page 179. 5. Replace the DC controller PCA. See "DC controller PCA" on page 181. 60.3 The tray 3 lifter-motor is not TRAY 3 LIFTER MOTOR FAILURE functioning. Tray 3 can be a 500-sheet feeder or 1,500-sheet feeder accessory. 1. Turn the printer off and then on. 2. If the error persists. turn the printer off. 3. Verify that the tray 3 lifter wire-harness is fully seated in its connector on the sheet feeder PCA. 4. Replace the tray 3 lifter-driver assembly. See "500-sheet feeder lifter-drive assembly" on page 209 or "1,500-sheet feeder lifter-drive assembly" on page 222. 5. Replace the tray 3 feeder controller PCA. See "500-sheet feeder control PCA" on page 207 or "1,500-sheet feeder control PCA" on page 220. 290 Troubleshooting Q2431-90912