Printed Circuit Board A - Janome MC400E Service Manual

Setscrews (B)
Setscrew (B)
Printed circuit board A connection
Bobbin thread winding
Program (master)
Phase sensor
X-motor
Thread tension motor
DC motor
Replacing the Printed Circuit Board A
Setscrews (A)
Printed circuit
board A
Case
Disconnecting LCD Module Flexible PCB
USB
To remove:
1. Remove the face cover, bed cover and front cover (refer
to pages 1, 3 and 4).
2. Disconnect all the connectors from the printed circuit
board A.
3. Remove the 3 setscrews (A) and remove the printed
circuit board A with the case.
4. Remove the 4 setscrews (B) and remove the printed
circuit board A from the case.
To attach:
1. Follow the above procedure in reverse.
NOTE:
Refer to the following diagram when connecting the
connectors.
Flexible PCB
Lift up the clamp to unlock.
Close the clamp to lock.
Touch panel (Black)
Printed circuit
board L3(Red)
Printed circuit board F(Black)
Presser foot lifter sensor(Black)
Thread detection sensor (White)
Switching power supply (White)
Bobbin thread
detecting sensor (Green)
Y-motor
Switching power supply (White)
Thread cutter motor (White)
18
Program (slave)(Black)
Printed circuit board L2 (White)
Printed circuit
board L1(Black)
MC450e