The Classic LaserJet Troubleshooting Manual Contents - Section 3 Booklet Organisation Service Notes; SXEngine Re~rbishment Kits; Service Test Tool; Power Supply /Error 12 Troubleshooting Flow Diagram. Faults with Error Nnmbers. Miscellaneous Problems. Print Quality Problems. Paper Path Problem. PostScript Problems. Manual Paper Feed Problems. LJIIIIIID Powered Envelope Feeder Problems. ! 3-1