8-2. Inside the control box and operation panel structure; 8-2. Inside the control box and operation panel structure ; Main P.C. board - Page 118

8. ELECTRICAL MECHANISM 

111

BAS-311G, BAS-326G

8-2. Inside the control box and operation panel structure 

Main P.C. board 

Secured to the side. This is the P.C. board that controls sewing machine operation. 

PMD P.C. board 

Secured to the base plate. This P.C. board drives the pulse motors and solenoids. 

Power supply motor 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 8 fuses on this P.C. board. 

DC fan motor 

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. 

Conversion transformer (Two types are used 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 (European destinations only) 

This eliminates the electrical interference that is generated by the power supply fan. 

Panel P.C. board 

Secured to the inside of the operation panel. This P.C. board is used for displaying the sewing machine status and for input 
operations. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Control box 

Operation panel 

DC fan motor 

NF P.C. board 

Power supply 
motor P.C. board 

Main P.C. board 

Conversion 
transformer 

PMD P.C. board 

Panel P.C. board 

4588Q 

5071Q