Brother BAS-311E Sewing operation, Power supply and electrical parts adjustment, supply circuit

Chapter 6 Power supply and electrical parts adjustment

•The work clamp does not operate.

•(For BAS-311E solenoid type, there is no need to carry out wiring to air valves.)

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Main PCB

Air valve

3. Sewing operation

• The power lamp is not lit, and nothing operates.	�
		Power					supply circuit		board
• Machine operation is unstable.
			Conversion transformer
							Power switch
• The power lamp is not lit, and nothing operates.	�	Power					supply circuit board
• Machine operation is unstable.
• The feed mechanism does not operate.
• The work clamp and the presser foot do not operate.
• Error [E.A1] appears.
				Main PDB
• The machine motor does not run.	�	Power supply circuit								board
• Motor operation is unstable.
• Needle up stop position is not correct.
• Error [E.20] appears.
• Error [E.22] appears.
						Main PDB
• The machine motor does not run.	�	Power supply circuit						board
• Motor operation is unstable.
• Needle up stop position is not correct.
• Error [E.20] appears.
• Error [E.22] appears.
					Main PDB
• The machine motor does not run.	�
						Main PCB
• Motor operation is unstable.
• Needle up stop position is not correct.
• Error [E.20] appears.
• Error [E.22] appears.
							Synchronizer

BAS-311E.311EL.326E.326EL 79