Brother 1240, HL-1030, 1250 service manual Faulty registration, Poor fixing

CHAPTER 6 TROUBLESHOOTING

I-11

Faulty registration

Possible cause	Step	Check	Result	Remedy
Excessive paper	1	Is the paper loaded in the	Yes	Instruct the user to keep paper
load		paper cassette more than		loads below 27mm in depth.
		27mm high?
Print paper	2	Is the specified weight of the	No	Recommend to use the specified
		recommended paper being		types of paper.
		used?
	3	Is the first printing position	Yes	Adjust the Y offset by using the
		within ±1mm of the tolerance		utility software supplied.
		specification?
Rear resist	4	Is the position of the rear	No	Reposition the sensor to the
sensor position		registration sensor normal?		correct position.
incorrect

I-12

Poor fixing

Possible cause	Step	Check	Result	Remedy
Print paper	1	Is thick paper of more than	Yes	Recommend to use the specified
		43lb being used?		types of paper.
Toner sensing	2	Is the problem solved by	Yes	1) Toner is empty.
failure		replacing the drum unit or the		2) The toner sensing is
(When printing		toner cartridge?		defective. Clean the toner
is faint.)				sensor.
				3) If the wiper in the toner
				cartridge is broken, replace
				the toner cartridge with a new
				one.
Thermistor	3	Is the thermistor fitted	No	Fit the thermistor correctly.
failure		correctly?
Low-voltage	4	Is the problem solved by	Yes	Replace the low-voltage power
power supply		replacing the low-voltage		supply PCB.
PCB failure		power supply PCB?

6-32