Brother S 7200 Manual

							 
 
S-7200A 
6. USING THE OPERATION PANEL (ADVANCED OPERATIONS)
25
6-2. Adjusting the needle up stop position 
1. While pressing the needle up/down key (1), turn on the 
power switch. 
2.  “n.0 xx” will appear in the main display (2). 
(“xx” is the setting value for the needle up stop position, 
and “0” is the default setting.) 
3. Press the rightmost    or    key (3) to change the 
setting value for the needle up stop position. 
• If you press the    key, the setting value will increase 
up to 10 and the needle up stop position will become 
lower. 
• If you press the      key, the setting value will decrease 
down to -10 and the needle up stop position will 
become higher. 
4.  Press the ENTER key (4) for two seconds or more. 
A long buzzer will sound and the main display (2) will 
change to stitch number display mode. (This completes 
the needle up stop position setting.) 
 
 
*  A setting value of “10” corresponds to an angle of rotation 
of approximately 10° for the upper shaft (5). 
 
 
 
 
 
 
 
 
 
 
6-3. LOCK key 
At the time of shipment from the factory, the LOCK key (1) is 
set to ON. (The icon (2) is illuminated.) 
In this state, the following three key operations are invalid so 
that setting values cannot be changed accidentally. 
 
FUNC key (3) 
This key is used to make settings for various functions. 
ENTER key (4) 
This key is used to accept function settings. 
MAX key (5) 
This key is used to change the maximum sewing speed.
 
 
*  Refer to the Service Manual for details on using these 
keys. 
 
 
 
 
 
 
 
 
 
 
            
6-4. Resetting all settings to their defaults 
While holding down the RESET key, turn on the power switch. 
If you press the ENTER key, the settings will then be reset. 
Once the settings have been reset, “iniT ALL” appears in the display and the operation panel settings are reset to their factory 
default settings. 
Once the above display appears, normal operation will then be possible. 
 
2210M
2211M
2138M  2139M
Becomes higher
Becomes lower
2212M
(–10 – 10) 
						

							 
 
S-7200A 
7. SEWING 
26
7. SEWING 
     CAUTION 
 
Attach all safety devices before using the sewing machine. If the machine is used without these devices attached, 
injury may result. 
Turn off the power switch at the following times. 
The machine may operate if the treadle is depressed by mistake, which could result in injury. 
y When threading the needle 
y When replacing the bobbin and needle 
y When not using the machine and when leaving the machine unattended 
Do not touch any of the moving parts or press any objects against the machine while sewing, as this may result in 
personal injury or damage to the machine. 
Use both hands to hold the machine head when tilting it back or returning it to its original position. If only one hand 
is used, the weight of the machine head may cause your hand to slip, and your hand may get caught. 
7-1. Sewing 
1.  Press the ON power switch (1). 
The power indicator (2) will illuminate. 
2. Use the operating panel to carry out the programming 
which is necessary for sewing. 
(Refer to the chapter on using the operating panel.) 
3.  Depress the treadle to start sewing. 
 
 
 
 
 
 
 
 
 
 
 
 
7-2. Backtacking 
When the actuator (1) or the reverse lever (2) is pressed 
during sewing, the feed direction will be reversed. When it is 
released, the feed direction will return to normal. 
 
 
 
 
 
 
2115M2114M 
2176M 2175M 
						

							 
 
S-7200A 
7. SEWING 
27
7-3. Sewing condensed stitches 
y If you press the actuator (1) or the reverse lever (2) while 
sewing is in progress, you can sew stitches (forward 
direction) with small stitch lengths. 
y Before carrying out sewing, set the stitch length for 
condensed stitches as follows. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1.  Lift up the dial lock lever (3) to release the lock. 
2. Turn the stitch length dial (4) to the stitch length to be 
used for condensed stitches. 
3.  Tilt back the machine head. 
4.  Loosen the nut (5) and then turn the bolt (6) until its head 
is touching the solenoid lever (7). 
5.  Tighten the nut (5) to secure the bolt (6). 
6.  Return the machine head to its normal position. 
 
 
1. Return the stitch length dial (4) to the stitch length for 
normal sewing. 
2.  Push down the dial lock lever (3) to engage the lock. 
3. Start sewing. 
4. At the position where you would like to start sewing 
condensed stitches, press the actuator (1) or the reverse 
lever (2). 
(Condensed stitches are sewn while the actuator (1) or 
reverse lever (2) is being pressed.) 
 
 
*  To stop sewing condensed stitches, tighten the bolt (6) so 
that its head is not touching the solenoid lever (7). 
 
 
 
2213M
2214M
2215M
Sewing direction 
Condensed stitches 
Unlocked 
Locked  
						

							 
 
S-7200A 
8. THREAD TENSION 
28
8. THREAD TENSION 
8-1. Adjusting the thread tension 
     CAUTION 
 
Turn off the power switch before removing or inserting the bobbin case.   
The machine may operate if the treadle is depressed by mistake, which could result in injury. 
 
Good even stitches 
 
       Upper thread     
       Lower thread     
 
    
 
Upper thread tension too weak or 
lower thread tension too strong  
Increase the upper thread tension. 
Decrease the lower thread tension. 
    
 
Upper thread tension too strong 
or lower thread tension too weak  
Decrease the upper thread tension. 
Increase the lower thread tension. 
 
 
Adjust by turning the adjustment screw (1) until the bobbin 
case drops gently by its own weight while the thread end 
coming out of the bobbin case is held. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
After the lower thread tension has been adjusted, adjust the 
upper thread tension so that a good, even stitch is obtained. 
1.  Lower the presser foot. 
2. Adjust by turning the tension nut (2). 
 
 
 
0572M 
0573M 
0574M 
Becomes weaker 
Becomes stronger 
2177M
2178M
Becomes weaker
Becomes stronger  
						

							 
 
S-7200A 
8. THREAD TENSION 
29
8-2. Adjusting the presser foot pressure 
 
Correct stitches 
 
       Upper thread     
    
 
Skipped stitches occur   
   
Increase the pressure. 
  Uneven stitch length     
    
 
Stitches are puckered  
Decrease the pressure. 
 
The presser foot pressure should be as weak as possible, 
but strong enough so that the material does not slip. 
1. Loosen the adjusting nut (1). 
2.  Turn the presser adjusting screw (2) to adjust the presser 
foot pressure. 
3.  Tighten the adjusting nut (1). 
 
 
 
 
 
 
 
 
 
 
8-3. Adjusting the trailing length after thread trimming 
y At the time of thread trimming, the thread tension is 
loosened and tension is applied by the pretension (1) only. 
y The standard trailing length for the upper thread is 35–40 
mm. 
y If the tension of the pretension (1) is increased, the 
lengths of the threads trailing from the needle tips will be 
reduced; if the tension is reduced, the lengths will be 
increased. 
Adjust by turning the pretension (1). 
 
 
 
 
 
 
 
 
0894M 
0895M 
0896M 
0897M 
Becomes stronger  Becomes weaker 
2179M
2180M
2181M 
Longer Shorter  
						

							 
 
S-7200A 
9. CLEANING 
30
9. CLEANING 
     CAUTION 
 
Turn off the power switch before carrying out cleaning.   
The machine may operate if the treadle is depressed by mistake, which could result in injury. 
Be sure to wear protective goggles and gloves when handling the lubricating oil and grease, so that they do not get 
into your eyes or onto your skin, otherwise inflammation can result. 
Furthermore, do not drink the oil or eat the grease under any circumstances, as they can cause vomiting and 
diarrhea. 
Keep the oil out of the reach of children. 
Use both hands to hold the machine head when tilting it back or returning it to its original position. If only one hand 
is used, the weight of the machine head may cause your hand to slip, and your hand may get caught. 
 
9-1. Daily cleaning procedures 
The followinig cleaning operations should be carried out each day in order to maintain the perfomance of this machine and to 
ensure a long service life. 
Furthermore, if the sewing machine has not been used for a long period of time, carry out the following cleaning procedures 
before using it again.
 
1. Cleaning
 
1.  Raise the presser foot. 
2.  Remove the two screws (1), and then remove the needle 
plate (2). 
3.  Use a soft wire brush to clean any dust from the feed dog 
(3). 
4.  Install the needle plate (2) with the two screws (1). 
 
 
 
 
 
 
 
 
 
 
5.  Tilt back the machine head. 
6.  Remove the bobbin case (4). 
7.  Wipe off any dust from the rotary hook (5) with a soft cloth, 
and check that there is no damage to the rotary hook (5). 
8.  Remove the bobbin from the bobbin case (4) and clean 
the bobbin case (4) with a cloth. 
9.  Insert the bobbin into the bobbin case (4), and then place 
the bobbin case (4) back into the machine. 
 
 
 
 
 
 
2182M
2126M 2183M
2184M 
						

							 
 
S-7200A 
9. CLEANING 
31
2. Lubrication 
A. Gearbox oil quantity 
NOTE: 
y Check the quantity of oil in the gearbox immediately 
after tilting back the machine head. 
When the machine head is left for long periods in the 
tilted-back position, the amount of oil in the felt inside 
the gearbox drops and the oil level seen from the oil 
window (1) rises, so that it becomes impossible to 
measure the actual oil level accurately. 
y The position of the oil level in the oil window (1) will 
vary depending on the angle of the machine head. 
Tilt back the machine head while the head rest (2) is 
installed in the correct position as shown in the table 
processing diagram on page 4 (refer to page 6). 
 
 
The oil level should normally be approximately 1 mm above 
the center reference line in the oil window (1). (70 ml of 
lubricating oil is added to the gearbox at the time of shipment 
from the factory.) 
1.  Look at the oil window (1) from directly in front. 
2. If the oil level is below the normal level, add more 
lubricating oil as described in the following procedure. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Use only the lubricating oil (Nisseki Mitsubishi Sewing Lube 
10N; VG10) specified by Brother. 
1.  Remove the rubber cap (3). 
2.  Add lubricating oil until the oil level is approximately 1 mm 
above the center reference line in the oil window (1). 
Do not pour all of the lubricating oil in at once at this time. 
Pour the lubricating oil 10 ml at a time while checking the 
oil window (1). 
NOTE: 
Do not pour too much lubricating oil into the specified 
location. 
If too much oil is added, oil leaks may result. 
3. Insert the rubber cap (3) securely. 
4.  Return the machine head to its original position. 
 
NOTE: 
The rubber cap (3) has a hole in it for adjusting the air 
pressure. 
When replacing the rubber cap (3) use only the 
replacement part specified by Brother. 
2185M
2186M
2187M
2188M
Approx. 1 mm Approx. 1 mm  
						

							 
 
S-7200A 
9. CLEANING 
32
B. Oil tank oil quantity (-40[], 43[] specifications) 
Check the oil gauge window (1), and add more oil if the oil 
gauge (2) is below the lower reference line. 
(Refer to page 8.) 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3. Checking 
1.  Replace the needle if it is bent or if the tip is broken. 
2. Check that the upper threads have been threaded 
correctly. (Refer to page 15.) 
3.  Carry out a test sewing. 
 
 
 
 
 
2190M
2189M
Upper reference 
line
Lower reference 
line 
						

							 
 
S-7200A 
9. CLEANING 
33
9-2. Applying grease (When “GREASEUP” appears) 
If “GREASEUP flashes on the main display (1) and a buzzer sounds when the power switch is turned on, it means that 
grease needs to be applied. (The sewing machine will not operate at this time, even if the treadle is depressed.) 
Apply grease as required, while referring to the following for details. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1.  Press the RESET key (2). 
2.  The main display (1) will change to stitch number display mode, and sewing will be possible when the treadle is depressed. 
(The power indicator (3) will flash.) 
 
NOTE 
・ If you do not apply grease when the “GREASEUP” notification appears, the notification will continue to appear and the 
power indicator (3) will flash each time the power is turned on until you reset the notification by carrying out the 
procedure on the following page. 
・ If you continue to use the sewing machine after the “GREASEUP” notification appears without applying grease (or 
without carrying out the reset procedure), “Err100” will appear after a certain period of time and the sewing machine will 
be forcibly prevented from operating for safety reasons. 
If this happens, apply grease and carry out the reset procedure. 
 
 
Use Brother-specified grease (SA2355-001). 
 
2191M
Using the tube 
2216M 
						

							 
 
S-7200A 
9. CLEANING 
34
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1.  Turn the power switch to “OFF”. 
2.  Remove the screws and the set screws. 
3.  Apply grease to each of the holes until the grease overflows slightly. 
4.  Tighten the screws and the set screws in order to push the grease in. 
5.  Turn the machine pulley by hand to move the needle bar 
up and down several times in order to disperse the 
grease. 
6.  Use a cloth to wipe away any excess grease from around 
the screws and set screws and from underneath needle 
bar bush D. 
7.  Carry out the reset procedure given below. 
 
 
 
 
 
 
 
After the grease has been applied, carry out the following procedure to reset the cumulative time between grease 
applications. 
1.  Turn the power switch to “ON”. “GREASEUP” will flash in the main display (1) and the buzzer will sound. 
2.  Press the RESET key (2). The main display (1) will change to stitch number display mode. 
3.  Press the FUNC (Function) key (4). “n.134 xxx” will appear in green in the main display (1). 
(xxx represents the time between grease applications.) 
4. Press the rightmost   key (5). The “xxx” will change to “0”. 
5.  Press and hold the ENTER key (6) for two seconds or more. 
The buzzer will make a long beep, and then the main display (1) will change to stitch number display mode. (This 
completes the reset procedure.) 
 
    
Marked red 
2194M
2139M
 2192M
2193M