Brother HL-1070 - B/W Laser Printer Service Manual page 6

4. PACKING ........................................................................................................................ III-24
CHAPTER IV MAINTENANCE AND TROUBLESHOOTING........................... IV-1
1. INTRODUCTION...............................................................................................................IV-1
1.1 Initial Check .................................................................................................................................IV-1
1.2 Basic Procedure...........................................................................................................................IV-2
2. CONSUMABLE PARTS ....................................................................................................IV-2
2.1 Drum Unit.....................................................................................................................................IV-2
2.2 Toner Cartridge............................................................................................................................IV-2
2.3 Periodical Replacement Parts......................................................................................................IV-3
3. IMAGE DEFECTS .............................................................................................................IV-4
3.1 Image Defect Examples ...............................................................................................................IV-4
3.2 Troubleshooting Image Defects ...................................................................................................IV-5
3.3 Location of High-voltage Contacts and Grounding Contacts .....................................................IV-19
3.4 Location of Feed Roller Shaft and Grounding Contacts ............................................................IV-20
4. PAPER JAM....................................................................................................................IV-21
5. TROUBLESHOOTING MALFUNCTIONS .......................................................................IV-22
6. INSPECTION MODE.......................................................................................................IV-27
6.1 Incorporated Inspection Modes..................................................................................................IV-27
6.2 Error Codes...............................................................................................................................IV-29
APPENDICES
1. Serial No. Descriptions ......................................................................................................A-1
2. Connection Diagram ..........................................................................................................A-2
3. Main PCB Circuit Diagram, (1/5)........................................................................................A-3
4. Main PCB Circuit Diagram, (2/5)........................................................................................A-4
5. Main PCB Circuit Diagram, (3/5)........................................................................................A-5
6. Main PCB Circuit Diagram, (4/5)........................................................................................A-6
7. Main PCB Circuit Diagram, (5/5)........................................................................................A-7
8. Driver PCB Circuit Diagram ...............................................................................................A-8
9. Switch Panel/Solenoid, Bin/Relay PCB Circuit Diagram ....................................................A-9
10. Low-voltage Power Supply PCB Circuit Diagram (110 - 240V) ........................................A-10
11. Low-voltage Power Supply PCB Circuit Diagram (220 - 240V) ........................................A-11
12. High-voltage Power Supply PCB Circuit Diagram ............................................................A-12
13. SR PCB Circuit Diagram ..................................................................................................A-13
iii