Brother HL-820, HL-1020, HL-1040 manual Chapter IV Maintenance and Troubleshooting

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-3
	2.1	Drum Unit	IV-3
	2.2	Toner Cartridge	IV-3
	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, HL-820/1020		A-2
3.	Connection Diagram, HL-1040		A-3
4.	Connection Diagram, HL-1050		A-4
5.	Main PCB Circuit Diagram, (HL-820/1020/1040), (1/2)		A-5
6.	Main PCB Circuit Diagram, (HL-820/1020/1040), (2/2)		A-6
7.	Main PCB Circuit Diagram, (HL-1050), (1/5)		A-7
8.	Main PCB Circuit Diagram, (HL-1050), (2/5)		A-8
9.	Main PCB Circuit Diagram, (HL-1050), (3/5)		A-9
10. Main PCB Circuit Diagram, (HL-1050), (4/5)			A-10
11. Main PCB Circuit Diagram, (HL-1050), (5/5)			A-11
12. Panel Sensor PCB Circuit Diagram			A-12
13. Low-voltage Power Supply PCB Circuit Diagram, HL-820/1020/1040 (110 - 120V)			A-13
14. Low-voltage Power Supply PCB Circuit Diagram, HL-820/1020/1040 (220 - 240V)			A-14
15. Low-voltage Power Supply PCB Circuit Diagram, HL-1050 (110 - 120V)			A-15
16. Low-voltage Power Supply PCB Circuit Diagram, HL-1050 (220 - 240V)			A-16
17. High-voltage Power Supply PCB Circuit Diagram			A-17
18. How to Know Drum Unit Life & Page Counter			A-18
19. Diameter / Circumference of Rollers			A-20

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