Brother International HL 1240 Service Manual - Page 7

TABLE OF CONTENTS CHAPTER 6 TROUBLESHOOTING 6-1 1. INTRODUCTION ...6-1 1.1 Initial Check ...6-1 1.2 Warnings for Maintenance Work 6-2 1.3 Identify the Problem ...6-3 2. OPERATOR CALLS & SERVICE CALLS 6-4 2.1 Operator Calls...6-4 2.2 Service Calls ...6-4 3. ERROR MESSAGES 6-6 3.1 Error Messages in the Status Monitor 6-6 3.2 Error Message Printouts 6-8 4. PAPER PROBLEMS 6-9 4.1 Paper Load Problems ...6-9 4.2 Paper Jams...6-10 4.2.1 Clearing the jammed paper 6-10 4.2.2 Causes & countermeasures 6-11 4.3 Paper Feeding Problems 6-12 5. SOFTWARE SETTING PROBLEMS 6-14 6. MALFUNCTIONS 6-18 7. IMAGE DEFECTS 6-23 7.1 Image Defect Examples 6-23 7.2 Troubleshooting Image Defect 6-24 7.3 Location of Grounding Contacts 6-41 7.3.1 Drum unit ...6-41 7.3.2 Printer body & paper cassette 6-41 8. INCORRECT PRINTOUT 6-42 9. INSPECTION MODE 6-45 9.1 Test Print Mode...6-45 9.2 Inspection Mode...6-46 APPENDICES 1. SERIAL NO. DESCRIPTIONS A-1 2. DIAMETER / CIRCUMFERENCE OF ROLLERS A-3 3. PRINT SPEEDS WITH VARIOUS SETTINGS A-4 4. HOW TO KNOW DRUM UNIT LIFE & PAGE COUNTER A-5 5. HOW TO USE THE SELF-DIAGNOSTICS TOOLS A-10 6. NVRAM DEFAULT VALUE A-14 7. PAPER CASSETTE INFORMATION (FOR EUROPE ONLY A-15 8. CONNECTION DIAGRAM, HL-1240 A-16 9. CONNECTION DIAGRAM, HL-1250 A-17 10. MAIN PCB CIRCUIT DIAGRAM, HL-1240 (1/2 A-18 v