BIXOLON SRP-270 service manual Rev

SRP-270

Phenomenon	Condition	Cause	Level	Check point & Method	Repair Method
2. No dot	Motor rotates	⑤Defective	B	·Observe by	·If input pulse is
printing	normally but no	input charge		oscilloscope	not generated or
is performed	dot printing is	pulse		to check if the input	if such pulse is
	performed			charge pulse is within	outside rated values
				rated values	repair the driving
				·Pulse rating:	control circuit
				For voltage and pulse
				width refer to the
				specifications for
				SMP-710/710N
		⑥Positional	B	·Check if the gap	·If incorrect, perform
		relations-hip		between the Platen	repair according
		between		and the tip of	to "Adjustment"
		head and		head is correct
		the platen		correct value :
				0.51±0.1mm
3. Missing	Only specific	①Damaged	B	·Check the conductivity	·If there is no
of Head dots	dots are never	lead in head		between the pertinent	conductivity,
	printed	FPC		common lead of the	replace the head
				head FPC and other
				terminal
		②Lead	B	·Check the conductivity	·Replace the main
		breakage		between the pertinent	circuit board Assy if
		between		terminals	these is no
		connector and			conductivity
		FPC terminals
		③Damaged	B	·To check if the	·If the resistance is
		lead of a dot		resistive value of the	outside rated
		driving coil		pertinent dot driving	values, replace the
				coil is within rated	head
				values, measure the
				resistance of the
				terminal between
				connectors Rated
				value : 20Ω±10%
		④Defective	B	See cause ④ of	phenomenon 2
		timing detector
		sub Assy
		⑤Defective	B	See cause ⑤ of phenomenon 2
		input charge
		pulse
4. Missing of	All of date are	①Defective	A	See cause ① of phenomenon 3
Dot Head	not printed	contact of the
		Head FPC
		②Malfunction	B	·Check if paper dust is	·If the paper dust is
		of the Head		caught in the tips of	caught, remove it
		unit		the head pin
		③Defective	B	See cause ④ of	phenomenon 2
		Timing detector
		Assy
		④Defective	B	See cause ⑤ of phenomenon 2
		input charge
		pulse

Rev. 3.02 - 69 -