Brother HL-1260 service manual Poor fixing, Faulty registration

I-13

Faulty registration

Possible cause	Step	Check	Result	Remedy
Top margin	1	Does self test printing have no problem?	Yes	Check again the top margin
setting error				setting in the printing data.
Paper load in	2	Is over-amount of paper than specified load	Yes	Reduce the paper load below
the cassette		on the cassette?		the specified limit.
Paper failure	3	Does print quality improve when	Yes	Use recommended paper.
		recommended paper is used?
Paper failure	4	Is paper curled?	Yes	Use recommended fresh
				paper without curl.
Improper Y	5	Does print quality improve when Y offset	Yes	Ajust Y offset setting to an
offset setting		setting is changed?		appropriate value.
Jam remove	6	Is the jam remove cover deformed?	Yes	Replace the jam remove
cover failure				cover.
Failure in	7	Does the regist sensor actuator operate	No	Reassemble the actuator
regist sensor		smoothly?		and, if the problem is not
actuator motion				resolved, replace the actuator.
Regist sensor	8	Is the voltage at the pin 5 of the connector P3	No	Replace the paper feed/size-
failure		of the main PCB 5V when no paper passes		sw PCB assy or the harness
		and 0V when paper passes?		and, if the problem remains,
				replace the main PCB assy.
Paper feed
			Yes	Replace the paper feed roller
roller failure				assy.

I-14

Poor fixing

Possible cause	Step	Check	Result	Remedy
Fixing unit release	1	Is the fixing unit release spacer removed?	No	Remove the fixing unit
spacer not				release spacer.
removed
MEDIA TYPE	2	Is the MEDIA TYPE set to TRANSPARENCY?	Yes	Set the MEDIA TYPE to
setting				REGULAR or THICK PAPER.
Paper failure	3	Is thick paper over than 36lb (135g/m2) used?	Yes	Instruct the user to use the
				paper whose thickness is
				less than the recommended
				value.
Thermistor	4	Is the voltage at the pin 3 of the connector	No	Replace the fixing unit.
failure		P11 of the main PCB is controlled within
Fixing unit		1.80±0.10V during continuous printing?
			Yes	Replace the fixing unit.
failure

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