Brother S 7200 Manual

 
 
S-7200A 
10. TROUBLESHOOTING 
35
10. TROUBLESHOOTING 
y Please check the following points before calling for repairs or service. 
y If the following remedies do not fix the problem, turn off the power switch and consult a qualified technician or the place of 
purchase. 
    DANGER 
 
Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet 
before opening the face plate of the control box. Touching areas where high voltages are present can...

 
 
S-7200A 
10. TROUBLESHOOTING 
36
 
Problem Possible cause Page 
5  Skipped stitches at sewing 
start 
Thread unravelling at 
sewing start y Is the thread take-up spring tension too strong? 
Reduce the tension of the thread take-up spring. 
y Is the thread take-up spring operating range too large? 
Lower the position of the thread take-up spring. 
y Are the trailing lengths of the upper threads too short after thread 
trimming? 
Adjust the pretension. 
y Are the threads not being trimmed cleanly?...

 
 
S-7200A 
10. TROUBLESHOOTING 
37
 
Problem Possible cause Page 
9  Lower thread is tangled at 
the sewing start. 
Spinning of bobbin during 
thread trimming y Is the bobbin spinning direction correct when the lower thread is 
being pulled? 
Set the bobbin so that it turns in the opposite direction to the 
rotary hook. 
y Is there too much thread 
wound onto the bobbin? 
The bobbin winding 
amount should not be 
more that 80 %. 
y Is 
the anti-spin spring attached? 
Attach the anti-spin spring. 
y Is...

 
 
S-7200A 
10. TROUBLESHOOTING 
38
 
Problem Possible cause Page 
13 Broken needles y Is the material being pushed or pulled with excessive force during 
sewing? 
y Is the needle properly installed? 
If it is incorrect, install the needle correctly. 
y Is the needle bent, is the needle tip broken, or is the needle hole 
blocked? 
Replace the needle. 
 
 
y It is extremely dangerous to leave any pieces of broken 
needle sticking in the material. If the needle breaks, search 
for all pieces until the...

 
 
S-7200A 
10. TROUBLESHOOTING 
39
 
Problem Possible cause Page 
19  “GREASEUP” flashes on 
the operation panel when 
the power is turned on. y This display is to notify you that it is time to apply grease. 
Apply grease. 
 
  
33* 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
10-2. Error code displays 
If an error code appears on the operation panel display 
1.  Make a note of the error code and then turn off the power. 
2.  After the operation panel display has turned off, eliminate the cause of the error and...

 
 
S-7200A 
10. TROUBLESHOOTING 
40
 
Error code Possible cause  Page 
Err    4 y Is the motor connector disconnected from the 
control box? 
Insert the connector securely. 
 
 
 
 
 
y Has the machine locked up? 
Turn off the power and then turn the machine pulley by hand and check that it 
turns easily. 
  
 
11 
Err    5 y Is the machine connector inside the control 
box disconnected? 
Insert the connector securely. 
 
 
 
 
y Is 
the machine head tilted back? 
Return the machine head to its normal...

 
 
 
 
INSTRUCTION MANUAL       □ 
 
 
 
 
 
 
877-S20
SA2016-001
2003.02.B(1)