Janome MC9900 - Switching Power Supply Unit

10
Switching power supply unit
To remove:
1. Remove the belt cover (see page 1).
2. Loosen the setscrew A. Remove the cord guide plate.
(see fig. 1)
3. Disconnect the relay connector between the printed
circuit board A and the switching power supply unit
(see fig. 2).
4. Disconnect the power supply connector from the
switching power supply unit (see fig. 3).
5. Remove the setscrews B, C and D (see fig. 3).
Remove the switching power supply.
To attach:
1. Follow the above procedure in reverse.
Replacing electronic components
Switching power supply unit
Fig. 1 Fig. 2
Relay connector
Setscrew A
Cord guide plate
Fig. 3
Power supply connector
Switching power
supply unit
Setscrew B
Setscrew C
Setscrew D