Brother BAS-311G service manual Electrical Mechanism

				8. ELECTRICAL MECHANISM
Problem	#12 Work clamp does not drop.
	Cause		Inspection/Remedy/Adjustment	Replacement if a malfunction
1. Incorrect work clamp home		1)	Adjust the home position while referring to
position adjustment			“7-20. Adjusting the home position”.
		2)	Check if the thread wiper or work clamp are
			touching something else.
2. Incorrect mechanism adjustment		Check if the movement of the work clamp arm is		Work clamp arm assembly
		stiff.
Problem	#13 TEST indicator does not illuminate when the TEST key is pressed.
	Cause		Inspection/Remedy/Adjustment	Replacement if a malfunction
1. Malfunction of panel P.C. board		Check that connector P1 (PANEL) is inserted		Panel P.C. board
		into the main P.C. board, and that connector		Panel harness
		CN2 (MAIN) is inserted into the panel P.C.
		board.
2. Malfunction of main P.C. board		Replace the main P.C. board.		Main P.C. board
Problem	#14 The feed mechanism does not move one stitch at a time during test feed.
	Cause		Inspection/Remedy/Adjustment	Replacement if a malfunction
1. Malfunction of foot switch or		Refer to inspection #5.
cord
2. Incorrect memory switch setting		1) Set memory switch No. 200 to OFF.
		2) Set memory switch No. 252 to OFF.
Problem	#15 Feed mechanism does not move fast during test feed.
	Cause		Inspection/Remedy/Adjustment	Replacement if a malfunction
Malfunction of foot switch or cord		Refer to inspection #5.
Problem	#16 Feed mechanism does not follow program during test feed.
	Cause		Inspection/Remedy/Adjustment	Replacement if a malfunction
Malfunction of foot switch or cord		Refer to inspection #5.
Problem	#17 Intermittent presser foot does not drop during sewing.
	Cause		Inspection/Remedy/Adjustment	Replacement if a malfunction
1. If the presser foot does not		Remove fuse F2 from the power supply motor		Fuse
operate and [E300] is displayed,		P.C. board and check the continuity.		6A-250V
there is a blown fuse.		OK if continuity
		(If there is no continuity, carry out the inspections
		in 2.)

BAS-311G, BAS-326G 131