Brother BAS-311E Service Manual page 86

Chapter 6 Power supply and electrical parts adjustment
Contact failure
The connectors functions are divided into four categories. Some connectors may belong to more than one group. Be
sure to investigate another category if a problem is not found in one category.
Ffor the details of connections, refer to the control circuit block diagram at the end of this manual.
1. Feed mechanism
Home position is not properly detected.
Error [E.A1] appears.
Forward feed does not operate correctly.
Error [E.A1] appears.
Sideways feed does not operate correctly.
Error [E.A1] appears.
2. Work clamp lifter and thread trimmer mechanisms
The work clamp does not operate.
The machine does not operate.
The work clamp does not operate. BAS-311E (Solenoid type)
Thread trimming is not performed.
Thread wiper does not operate.
The work clamp does not oeprate.
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Problem
BAS-311E.311EL.326E.326EL
Connector No. and position
Main PCB
X home Y home
position position
sensor sensor
Main PCB
Y pulse motor
Main PCB
X pulse motor
Main PCB
Control
box
Foot switch
Main PCB
Presser
Thread Sewing
Wiper
trimming clamp foot
solenoid
solenoid solenoid
solenoid