8. ELECTRICAL MECHANISM - Page 133

8. ELECTRICAL MECHANISM 

126

BAS-311G, BAS-326G

Problem    #2    When the power is turned on, nothing is displayed in the PROGRAM No. display or the menu display. 

Cause

Inspection/Remedy/Adjustment

Replacement if a malfunction

Control program does not operate. 
 

Insert a CF card containing the control program, 
turn on the power switch and update the program 
version. (Refer to “3-11. Updating the control 
program”.) 

Main P.C. board 

Problem    #3    When the power is turned on, an error code is displayed. 

Cause

Inspection/Remedy/Adjustment

Replacement if a malfunction

1.  If [E025] or [E035] is displayed, 

the foot switch is still depressed. 

1)  Check if the foot switch is still depressed. 
2)  Check if there is a harness short-circuit. 
3)  Check that connector P6 (FOOT) is inserted 

into the main P.C. board. 

Treadle unit 
Two-pedal foot switch 

2.  If [E055] is displayed, there is a 

malfunction of the machine head 
switch. 

1)  Check that the machine head switch is OFF. 
2)  Check if there is a harness short-circuit. 
3) Check that connector P9 (HEAD-SW) is 

inserted into the main P.C. board. 

Machine head switch 

3.  If [E065] is displayed, one of the 

keys on the operation panel is 
still depressed. 

Check that connector P1 (PANEL) is inserted 
into the main P.C. board, and that connector 
CN2 (MAIN) is inserted into the panel P.C. 
board. 

Panel P.C. board 
Panel harness 

4.  If [E403] is displayed, there is a 

poor connection between the 
main P.C. board and the PMD 
P.C. board. 

1) Check that connector P17 (M-MOTOR) is 

inserted into the main P.C. board, and that 
connector P6 (MAIN) is inserted into the 
power supply motor P.C. board. 

2)  Check if there is a harness short-circuit. 

Harness 
Power supply motor P.C. 
board 
Main P.C. board 

5.  If [E401] is displayed, there is a 

poor connection between the 
main P.C. board and the power 
supply motor P.C. board. 

1) Check that connector P1 (MAIN) is inserted 

into the power supply motor P.C. board. 

2)  Check if there is a harness short-circuit. 

Main P.C. board 

6.  If [E450] or [E452] is displayed, 

the machine head memory 
cannot be verified. 

1) Check that connector P3 (HEAD-M) is 

inserted into the power supply motor P.C. 
board. 

2)  Check if there is a harness short-circuit. 

Machine head memory 

7.  If [E700] is displayed, there is an 

abnormal rise in the power 
supply voltage. 

1)  Check that the power supply voltage at the 

wall outlet is within the range of the 
specification voltage +/- 10%. 

2)  Refer to check items #1-2 and #1-3. 

8.  If [E705] is displayed, there is an 

abnormal drop in the power 
supply voltage. 

1)  Check that the power supply voltage at the 

wall outlet is within the range of the 
specification voltage +/- 10%. 

2)  Refer to check items #1-2 and #1-3. 

9.  If [E740] is displayed, there is a 

malfunction of the cooling fan. 

1)  Check if there are any thread scraps blocking 

the cooling fan. 

2)  Check that connector P22 (FAN) is inserted 

into the main P.C. board. 

DC fan motor assembly