Brother HL-1030, 1240, 1250 service manual Dark

CHAPTER 6 TROUBLESHOOTING

I-2

Dark

User Check

(1) Check the paper used meets the recommended paper specifications.

(2)Check the printer’s environment. High temperature and high humidity conditions can increase the amount of background shading.

(3)Clean the corona wire with the wire cleaner.

(4)Try installing a new toner cartridge or drum unit.

Possible cause	Step	Check	Result	Remedy	Ground
					contacts
Corona failure	1	Are the charge electrodes	Yes	Clean both electrodes.	➂
(contact failure)		between the printer body and
		the drum unit dirty?
Drum unit failure	2	Is the problem solved after	Yes	Replace the drum unit
		replacing the drum unit?		with a new one.
Toner cartridge	3	Is the problem solved after	Yes	Replace the toner
failure		replacing the toner cartridge?		cartridge with a new
				one.
High-voltage	4	Is the connections of the	Yes	Replace the high-
power supply		connector between the high-		voltage power supply
PCB failure		voltage power supply PCB and		PCB.
		the engine PCB secured
		correctly?
Main PCB failure	5	Are there any disconnected	No	Replace the main
		connectors?		PCB.
Engine PCB	6	Are there any disconnected	No	Replace the engine
failure		connectors?		PCB.

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