Brother BAS-311G service manual Electrical Mechanism, 4886Q, 4884Q

				8. ELECTRICAL MECHANISM
Problem	#8	When the foot switch is depressed, an error code is displayed.
		Cause	Inspection/Remedy/Adjustment	Replacement if a malfunction
3. If the feed mechanism does not			1) Disconnect connector P8 (YPM) from the	Pulse motor Y assembly
move and [E210] 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 P8.	PMD P.C. board
			2) If 1) is OK, there is a malfunction of the PMD
			P.C. board.
		4886Q
Problem	#9	When the foot switch is depressed, an error code is displayed.
		Cause	Inspection/Remedy/Adjustment	Replacement if a malfunction
1. If the work clamp 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.)
2. If the work clamp does not			1) Disconnect connector P9 (POWER1) from	PMD P.C. board or power
operate and [E300] is displayed,			the PMD P.C. board and measure the	supply motor P.C. board
there is a malfunction of the			resistance between pins 1-2 at connector P9.
PMD P.C. board or of the power			OK if ∞ Ω; if 0 Ω, there is a malfunction of the
supply motor P.C. board.			PMD P.C. board.
			2) Measure the resistance between the fuse F2
			terminal that is close to P6 (MAIN) and pin 2
			of connector P7 (PMD) on the power supply
			motor P.C. board. (D10 check)
			OK if ∞ Ω
			3) Disconnect connector P9 (POWER1) from
			the PMD P.C. board, and then measure the
			voltage between pins 1-2 of the cord-side
			connector.
			OK if approx. +100 V
			After measuring, turn off the power, wait 5
			minutes or more and then insert P9.
			4) Disconnect connector P2 (POWER2) from
			the PMD P.C. board, and then measure the
			voltage between pins 1-2 of the cord-side
			connector.
			OK if approx. +16 V
			After measuring, turn off the power, wait 5
			minutes or more and then insert P2.
			5) Check that connector P1 (MAIN) is inserted
			into the PMD P.C. board.
		4884Q

BAS-311G, BAS-326G 129