HP LaserJet 4 Service Manual - Page 10
Troubleshooting - error 14
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Page 10 highlights
Removing the High Voltage Contact Assembly and Feed Guide Assembly 6-67 Replacing the High Voltage Contact Assembly/Feed Guide Assembly 6-68 Interconnect PCA Removal 6-69 7 Troubleshooting LaserJet 5 Error Map 7-A Pre-Troubleshooting Procedures 7-1 Preliminary Operating Checks 7-1 Printer Message Troubleshooting 7-2 Printer Message Summary Table 7-2 Clearable Warnings 7-10 Printer Message Troubleshooting Procedures 7-12 Blank Display 7-12 MP/PC/LC (Tray 1/2/3) LOAD Message 7-13 Cassette Size Switches (SW603, SW604, SW605) Functional Check 7-15 Paper Size Sensing Lower Cassette 7-16 PC Empty Sensor (PS2) Functional Check 7-17 PS4 Check (MP Tray Empty Sensor 7-17 12 Printer Open Message 7-18 SW601 Functional Check 7-19 13 PAPER JAM Message 7-20 PS1 (Input/Registration Sensor) Check 7-22 PS3 (Exit Sensor) Check 7-23 Pickup Motor Functional Test (M2 7-23 Lower Cassette Functional Check 7-24 14 NO EP CART Message 7-25 16 Toner Low Message 7-25 41.X ERROR Message 7-27 50 SERVICE Error - Fuser Malfunction 7-29 51 ERROR Message 7-31 52 ERROR Scanner Malfunction 7-32 Laser/Scanner Assembly Functional Checks . . . . . 7-32 57 (or 57.1) SERVICE Message (Main Motor Failure 7-33 Main Motor Functional Checks 7-33 58 (or 57.2) SERVICE (Fan Failure 7-34 Image Defect Summary 7-35 PS5 Check (MP Tray Paper End Sensor) Functional Test 7-44 Image Formation Troubleshooting 7-49 Half Self-Test Functional Check 7-49 Contents-6