Brother BAS-311E service manual Chapter, After a few, Presser

Chapter 7

Error status			Probable causes						Check/repair/adjust	Parts to be replaced
	1. With error code [E.40], a floppy								• When a floppy disk is inserted into the FDD, check	Drive device
		disk is not inserted.							the sound of the motor.
#3
After a few	2.	With error code [E.41] or [E.4F],							• When error code [E.40], [E.41], or [E.4F] appears,	Floppy
seconds
after the		the floppy disk is defective.							insert other floppy disk into the FDD.
R/W switch									If the FDD reads the floppy disk, the original disk
is pressed,
									is defective.
an error
code
appears.
	3.	Panel circuit board defective								Panel circuit
										board
	1.	Foot switch and code defective							(Make sure that the power is turned off.)	Foot switch
									• Remove the connector for foot switch connected
	1 - 2 Presser foot								to the outside of the control box, and check the
									continuity between pins 1 and 2, and pins 7 and 8
					Connector on the co			rd
									in the connector on the cord. (For pneumatic
									specification, check the continuity between pins 3
									and 4.)
									The continuity in each case should be normally ∞
									Ω or 0 Ω when the switch is stepped on.
	7 - 8 Start
				3	- 4 Second switch		Presser
					(Pneumatic only)
#4
	2.	Any cord in the control box is							• Insert the connector checked above, open the	Foot switch code
The work
clamp does		defective.							control box, and check the continuity between	assembly
not move									pins 1 and 2, pins 3 and 4, pins 5 and 6 in
up and
									connector P19 (FOOT) on the PCB.
down
									(Without removing the connector, put a tester
when the
foot switch									from the lead side.)
is stepped									The continuity in each case should be normally ∞
on.
									Ω or 0 Ω when the switch is stepped on.
		Start		Presser		Second switch
				foot		Presser
						(Pneumatic only)
	3.	Fuse blown							• Remove fuse no.1 and check the continuity.	(Quick melting
									(If there is no continuity, go to the next item.)	type 5A-250V

106 BAS-311E.311EL.326E.326EL