Brother BAS-311G service manual Electrical Mechanism, 4885Q

8. ELECTRICAL MECHANISM

Problem		#7 When the foot switch is depressed, an error code is displayed.
		Cause		Inspection/Remedy/Adjustment	Replacement if a malfunction
1.	If the X feed moves slightly and		1)	Check that connector P20 (X-ENC) is	Pulse motor X assembly
	then [E200] is displayed, there is			inserted into the main P.C. board.
	a malfunction of the encoder.		2)	Check the encoder input while referring to
				“2-8. Input checking method”.
2. If the		X feed moves and then	1)	Check that connector P8 (SENSOR1) is	X home position sensor
	[E200] is displayed, there is a			inserted into the main P.C. board.
	malfunction of the X home		2)	Check the X home position sensor input
	position sensor.			while referring to “2-8. Input checking
				method”.
			3)	If a metallic object is brought close to the X
				home position sensor and the LED inside the
				sensor does not illuminate, there is a
				malfunction of the sensor.
			4)	If it illuminates, the home position dog is
				incorrectly adjusted.
				Switch to home position adjustment mode,
				and adjust the position of the home position
				dog. (Refer to “7-20. Adjusting the home
				position”.)
3.	If the feed mechanism does not		1)	Disconnect connector P10 (XPM) from the	Pulse motor assembly
	move and [E200] is displayed,			PMD P.C. board, and measure the resistance
	there is a malfunction of the			between pins 1-2 and 3-4 at the cord-side
	pulse motor or cord.			connector.
				OK if 2−3 Ω
				After measuring, insert P10.	PMD P.C. board
			2)	If 1) is OK, there is a malfunction of the PMD
				P.C. board.
		4885Q
Problem		#8 When the foot switch is depressed, an error code is displayed.
		Cause		Inspection/Remedy/Adjustment	Replacement if a malfunction
1.	If the Y feed moves slightly and		1)	Check that connector P4 (Y-ENC) is inserted	Pulse motor Y assembly
	then [E210] is displayed, there is			into the main P.C. board.
	a malfunction of the encoder.		2)	Check the encoder input while referring to
				“2-8. Input checking method”.
2. If the		Y feed moves and then	1)	Check that connector P8 (SENSOR1) is	Y home position sensor
	[E210] is displayed, there is a			inserted into the main P.C. board.
	malfunction of the Y home		2)	Check the Y home position sensor input
	position sensor.			while referring to “2-8. Input checking
				method”.
			3)	If a metallic object is brought close to the Y
				home position sensor and the LED inside the
				sensor does not illuminate, there is a
				malfunction of the sensor.
			4)	If it illuminates, the home position dog is
				incorrectly adjusted.
				Switch to home position adjustment mode,
				and adjust the position of the home position
				dog. (Refer to “7-20. Adjusting the home
				position”.)

128 BAS-311G, BAS-326G