Brother manual 195

					8. ELECTRIC MECHANISM
Error status		#18 The thread trimmer does not operate.
Probable causes				Check/ repair/ adjust		Parts to be replaced
3. Main circuit board defective				• With P5 (SOL) connectors plugged in on		Main circuit board
				the main circuit board, turn on the power,
				perform sewing, and measure the voltage
				across pins 1 and 2 in the connector on
				the cable.
				If there is a sudden voltage output at the
				end of sewing, it is OK.
Thread trimmer			3648Q
Error status		#19 Thread take-up lever does not operate.
Probable causes				Check/ repair/ adjust		Parts to be replaced
1. Home position sensor not				• Adjust the thread take-up mechanism
adjusted properly				(page 62–64).
				(If the solenoid does not work even after it
				is separated from the mechanical parts,
				perform the following items #19-2 and
				#19-3.)
2. Thread		take-up	solenoid	• Separate P4 (SOL2) connectors on the
defective				main circuit board, and then measure the
				resistance between pins 1 and 2 in the
				connector on the cable.
				If the resistance is 12–14 Ω, the solenoid
				is not defective.
			3649Q
3. Main circuit board defective				• With connector P4 (SOL2) on the main
				circuit board removed, turn on the power,
				perform sewing, and measure the voltage
				across pins 1 and 2 of connector P4.
				If there is a sudden voltage output at the
				end of sewing, it is OK.
3650Q	Thread take-up lever
4. Incorrect		memory	switch	• Set memo-17 to OFF.
setting				<KE-436B, 436C>
				• Set memo-28 to ON.
Error status		#20 The machine does not stop with the needle at the upper position.
		(“E-50” appears <“E.22” for the KE-436B and 436C>.)
Probable causes				Check/ repair/ adjust		Parts to be replaced
1. Poor adjustment				• See “5-25. Adjusting the needle up stop
				position,” for adjustment.
2. Synchronizer defective				• See #16-1.

KE-430B, 430C series 188