Control Box Internal Configuration - Brother Z-8550A Service Manual

11. ELECTRICAL MECHANISM

11-2. Control box internal configuration

Main P.C. board
Secured to the side. This is the P.C. board that controls sewing machine operation.
There is 1 fuse on this P.C. board.
PMD P.C. board
Secured to the base plate. This is the P.C. board that drives the needle zigzag pulse motor.
Power supply P.C. board
Secured to the rear. This P.C. board generates the voltages that are required for control, and drives the main shaft motor.
There are 3 fuses on this P.C. board.
Cooling fan
This fan cools the inside of the control box.
The filters at the air intake slots in the cover and base plate should be cleaned about once a month.
Transformer (Two types are available depending on the power supply voltage specifications.)
This breaks down the power supply voltage into the voltages that are required for control operations.
NF P.C. board (Models for Europe only)
This eliminates the electrical interference that is generated by the power supply fan.
Control box
0160B
89
Z-8550A, 8560A
(1) Main P.C. board
(2) PMD P.C. board
(3) Power supply P.C. board
(4) Cooling fan
(5) Transformer
(6) NF P.C. board