HP LaserJet 5p/mp Service Manual - Page 68

HP LaserJet 5P Printer Service Supplement Troubleshooting Table 7. 57/58 Main Motor Failure LED Display ERROR CODE 57/58 Main Motor Failure Description and Recommendation The DC Controller has reported a general motor failure. The Main Motor is controlled by the DC Controller PCA, and seated into connector J601. Power-cycle the printer. If this doesn't clear the message: 1. Does the main motor rotate on power-up? If no: a. Reseat the Main Motor into the DC Controller connector. b. Inspect the Gear Train for debris that would block the free operation of the gears. c. The toner cartridge may not be rotating. Refer to "Drum Rotation Functional Check in the Combined Service Manual. d. Main Motor faulty. Power up the printer and observe if stacker rollers rotate. If not, replace the Main Motor. e. Replace the DC Controller PCA. If the main motor does rotate: 2. Does the fan turn during printing? If no: a. Power-cycle the printer. b. Check the fan to determine if it is blocked from operation. c. Reseat the fan connector on the Laser/Scanner Assembly. d. Replace the Fan. e. Replace the Laser/Scanner Assembly. f. Replace the DC Controller. g. Replace the connector between the scanner and DC Controller. 61