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S-7220C ENGLISH - Brother-ISM

1. 41 S 7220C 9 TROUBLESHOOTING 9 TROUBLESHOOTING e Please check the following points before calling for repairs or service e If the following remedies do not fix the problem turn off the power switch and consult a qualified technician or the place of purchase AXDANGER 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 result in severe injury CAUTION A Turn off the power switch and disconnect the power cord before carrying out troubleshooting The machine may operate if the treadle is depressed by mistake which could result in injury 9 1 Sewing Items with a in the Page column should only be checked by a qualified technician Problem Possible cause Page 1 Upper thread is not tight e Is the upper thread tension too weak or is the lower thread tension too strong Adjust the upper thread tension or lower thread tension y Uh Ul Ul UU O A AN A AN AANA AN N 0573M 2 Lower thread is not tight e Is the lower thread tension too weak or is the upper thread tension too strong Adjust the lower thread tension or upper thread tension 0574M 3 Loops appear in seam e Is the thread path not smooth enough Use a file with a fine grain or sandpaper to polish smooth the thread path e Is the bobbin n
2. 2 3 4 Ground wire Washer Spring washer Screw 4 Other cords Connect cords that match the voltage specifications lt Europe specifications gt 1 Filter box 2 Screws 4 pcs 3 Staples 7 pcs 4 Power cord 1 Attach an appropriate plug to the power cord 4 The green and yellow wire is the ground wire 2 Insert the power plug into a properly grounded electrical outlet NOTE Take care when tapping in the staples 3 to make sure that they do not pierce the cords Do not use extension cords otherwise machine operation problems may result 10 2 INSTALLATION lt 200 V system gt 1 Power switch L 2 Screws 2 pcs 3 3 pin power supply connector 4 Power cord 5 Staples 5 pcs 1 Attach an appropriate plug to the power cord 4 The green and yellow wire is the ground wire 2 Insert the power plug into a properly grounded electrical outlet NOTE Take care when tapping in the staples 5 to make sure that they do not pierce the cords Do not use extension cords otherwise machine operation problems may result Green and yellow wire ground wire 11 7220C 2 INSTALLATION lt 100 V 400 V system gt foe 1 Power switch 2 Screws 2 pcs Transformer box Transformer box plates 2 pcs Screw 4 pcs with washer 3 pin power supply connector Staples 6 pcs Cord clamps 2 p
3. 4168M 11 Sewing speed control display O This shows the sewing speed when the treadle is depressed to the maximum amount mT If all bars are illuminated it indicates that the maximum speed can be set milililll If all bars are switched off it indicates the minimum speed 220 sti min e ereevev eeeee 4169M Sewing speed control keys These keys let you adjust the sewing speed that is used when the treadle is depressed to the maximum amount The sewing speed can also be adjusted while sewing is in progress When the key is pressed the sewing speed becomes faster When the key is pressed the sewing speed becomes slower a i 4170M 13 14 Thread trimming lock key When this key is pressed so that the indicator illuminates the sewing machine stops in gt e the needle up position without thread trimming being carried out even if the treadle is depressed backward If the indicator of the AUTO key 10 is illuminated the sewing machine stops in the needle up position without thread trimming being carried out after the set number of stitches have been sewn 4171M I alf stitch key When the sewing machine is stopped the needle bar can be moved up and down by 2 pressing this key 4172M 15 Lower thread counter display This shows the lower thread counter value The counter is reduced by 1 for every ten stitches sewn 2154M Lower thread counter keys These keys a
4. In fixed stitch display E or F illuminates and the number of stitches for E or F are displayed 2136M 2 Setting keys These keys are used to set the number of backtack stitches for A B C and D and the ALIA IATA number of fixed stitches for E and F When the A key is pressed the setting increases from 0 up to 99 ViVi Vi lv When the V key is pressed the setting decreases from 99 down to 0 4160M_2138M_ 2139M 3 Start backtack key A When this key is pressed so that the indicator illuminates the number of start backtack O al 8 H stitches 0 99 in the A and B stitch number displays is sewn 4161M 4 End backtack key i When this key is pressed so that the indicator illuminates the number of end backtack O icp stitches 0 99 in the C and D stitch number displays is sewn When the treadle is Y depressed backward the end backtack stitches are sewn and then the thread is trimmed automatically If the treadle has not yet been depressed backward the end backtack function can be set to ON the number of stitches can be changed and the function can be set back to OFF 4162M 5 Continuous backtack key When this key is pressed so that the indicator illuminates the number of backtack stitches 0 99 in the A B C and D stitch number displays is sewn continuously After the sewing machine sews a full cycle of stitches set by A B C and D the thread is trimmed automatically LA O ABCD vv 4
5. S 7220C INSTRUCTION MANUAL Please note that the contents of this manual may differ slightly from the actual product purchased as a result of product improvements BROTHER INDUSTRIES LTD _http www brother com 1 5 Kitajizoyama Noda cho Kariya 448 0803 Japan Phone 81 566 95 0088 2013 Brother Industries Ltd All Rights Reserved S 7220C SB4251 001 E This is the original instructions 2013 04 D 1
6. K Turn the shaft 2 in the direction of the arrow within a l 4 S LL range of 90 with respect to the standard position Fig Lower the front C In order to prevent puckering lower the front of the feed dog 1 In order to prevent the material from slipping raise the front of the feed dog 1 Securely tighten the set screws 4 If you would like to tilt the feed dog 1 further turn the feed lifting rock bracket stud 5 while carrying out the above adjustment Fig D Refer to 8 4 Adjusting the feed dog height on the previous page for details of this operation The height of the feed dog 1 will change after the angle has been adjusted so it will be necessary to re adjust the height of the feed dog 1 Raise the front Parallel Needle plate 2 4 ee 2 Ks Lower the front 3769M mY Raise the front 2 2 Wy 4 2 Back is raised Lower the front 3770M S 7220C 38 8 STANDARD ADJUSTMENTS 8 6 Adjusting the needle and feed mechanism timing The standard timing is for the tip of the needle to be in the position given below when the machine pulley is turned forward to raise the feed dog 1 from its lowest position until it is flush with the top of the needle plate 2 At this time the mark on the lower shaft will be aligned with the center of the scale 4 O mark on the vertical cam 3 F lt 4 3 gt There is a gap of approximately 2 mm be
7. Securely tighten the nut 7 Loosen the nut 10 Turn the screw 11 until the distance between the end of the screw 11 and the knee lifter 12 is approximately 3 mm Turn the adjusting screw 11 to adjust so that the presser foot 6 is at the desired position within a distance of 16 mm of the needle plate when the knee liter plate 1 is fully pressed After adjustment is completed securely tighten the nut 10 2 INSTALLATION 2 3 Lubrication CAUTION Do not connect the power cord until lubrication has been completed otherwise 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 When cutting the nozzle of the oil tank hold the base of the nozzle securely If you hold the end of the nozzle injury from the scissors may result 1 T 8 line 7 S 7220C The sewing machine should always be lubricated and the oil supply replenished before it is used for the first time and also after long periods of non use Hold the base of the nozzle of the accessory oil tank 1 and use scissors to cut ab
8. Is the thread take up spring operating range too large Lower the position of the thread take up spring to as low a position as possible Is the presser foot pressure too strong Adjust the presser foot pressure Is the sewing speed too fast Use the sewing speed control keys to gradually reduce the sewing speed Is the angle of the feed dog correct Tilt the front of the feed dog down slightly 14 38 43 8 7220C 9 TROUBLESHOOTING Problem Possible cause Page 8 Lower thread is tangled at Is the bobbin spinning direction correct when the lower thread is the sewing start being pulled Spinning of bobbin during Set the bobbin so that it turns in the opposite direction to the thread trimming rotary hook Lower Is there too much thread thread wound onto the bobbin 80 a On The bobbin winding pee are amount should not be oe more that 80 2124M Is the anti spin spring attached Attach the anti spin spring Is the bobbin turning smoothly If the bobbin is not turning smoothly replace the bobbin Is a bobbin other that the light alloy bobbins specified by Brother being used Use only bobbins which are specified by Brother 0751M 9 Upper and lower threads Is the needle bent or is the needle tip broken are breaking Replace the needle if it is bent or broken Is the needle properly installed If it is incorrect install the needle correctly Is the machine properly threaded If it is incorr
9. Treadle connected to connector P14 on the main PCB 47 connector is not If there is a broken wire in the cord of the treadle connector replace the treadle i connected unit E09 The settings in Setting method for standard depression stroke may be incorrect Redo the settings in Setting method for standard depression stroke Problem with treadle unit Replace the treadle unit E E095 Was the power ON switch pressed while the treadle was still depressed Return the treadle to the neutral position When the treadle neutral position is detected the error will be cleared and normal operation will then be possible Is the power supply voltage too low Check the power supply voltage E1 lt The sewing machine could not stop correctly at the needle up stop position after thread trimming Remove any thread scraps that may be blocking the motor i Press the power OFF switch and then turn the machine pulley by hand and check that it turns easily Check that there are no problems with the thread trimming mechanism 2 E 2 The needle bar stops before the needle stop position needle up or needle down Turn the pulley by hand and check that it does not turn stiffly 5 Remove any thread scraps that may be stuck in the area around the rotary hook Abnormal needle up signal Press the power OFF switch and then check that the 10 pin resolver connector 9 is connected to connector P6 on the main PCB E1 3 Stopping could not
10. and end backtack key can be pressed to turn on the backtack sewing O al 8 function If changing the number of start and end backtack stitches in A B C and D press the name label i stitch key to turn off the name label function before making the change The ABCD display will 1 show the number of stitches and the settings can then be changed S 7220C 18 3 USING THE OPERATION PANEL BASIC OPERATIONS a a U aa 3 6 Sewing pleat presser stitches 4180M Example E 12 From 1 to 1999 stitches can be set If the treadle is continuously depressed and then you press the actuator switch while sewing is in progress the number of backtack stitches set in E is sewn and then normal sewing resumes N 0556D Thread trimming is carried out 25 2160M lt Automatic sewing and automatic thread trimming gt O These functions cannot be used AUTO lt Start and end backtack sewing gt The start backtack key and end backtack key can be pressed to turn on the backtack sewing ale function M If changing the number of end backtack stitches indicated in C and D press the pleat presser 1 sewing key to turn off the pleat presser sewing function before making the change The CD display O y will show the number of stitches and the setting can then be changed 19 S 7220C 3 USING THE OPERATION PANEL BASIC OPERATIONS 3 7 Using the lower thread counter e The
11. be confirmed This error is displayed when the machine could not be immediately stopped because of an abnormal load causing the machine speed to increase during a stopping operation Turn the pulley by hand and check that it does not turn stiffly i Remove any thread scraps that may be stuck in the area around the rotary hook E 30 The sewing machine or motor do not operate when the treadle is depressed Is the 4 pin motor connector inside the control box disconnected Press the power OFF switch and check the connection of the 4 pin motor connector 9 Has the sewing machine locked up Press the power OFF switch and then turn the machine pulley by hand and check that it turns easily Problem with control box Replace the control box x E 3 Is the 10 pin resolver connector inside the control box disconnected Press the power OFF switch and then check that the 10 pin resolver connector Problem with is connected to connector P6 on the main PCB 9 motor encoder signal Problem with motor or main PCB Replace the motor or the control box kk E132 Problem with motor operation Problem with motor Replace the motor Problem with drive PCB Replace the control box kk kk E140 Motor reverse operation Motor reverse operation was detected Replace the motor kk S 7220C 48 9 TROUBLESHOOTING Error code Possible cause Page E1 50 This is display
12. by two or more people Do not connect the power cord until installation is complete The machine may operate if the treadle is depressed by mistake which could result in injury Turn off the power switch before inserting or removing the plug otherwise damage to the control box could result Be sure to connect the ground If the ground connection is not secure you run a high risk of receiving a serious electric shock and problems with correct operation may also occur When securing the cords do not bend the cords excessively or fasten them too hard with staples otherwise there is the danger that fire or electric shocks could occur S 7220C If using a work table which has casters the casters should be secured in such a way so that they cannot move Secure the table so that it will not move when tilting back the machine head If the table moves it may crush your feet or cause other injuries 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 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 oi
13. higher C Needle plate B high Caer Becomes higher 3 Mae O to Becomes lower Becomes lower 3767M Pop The standard height of the feed dog 1 when it is at its maximum height above the top of the needle plate is 1 0 mm for 4 3 specifications and 1 2 mm for 405 specifications Turn the pulley until the feed dog 1 rises to the highest position Tilt back the machine head Loosen the screw 2 Turn the feed lifting rock bracket stud 3 within a range of 90 from the reference line 4 to adjust the vertical height of the feed bar 5 Fig A Tighten the screw 2 If you are worried about the angle of the feed dog 1 turn the shaft 6 while carrying out the above adjustment Fig B Refer to 8 5 Adjusting the feed dog angle on the next page for details of this operation 37 S 7220C 8 STANDARD ADJUSTMENTS 8 5 Adjusting the feed dog angle The standard angle is for the feed dog 1 to be parallel to the needle plate when the machine pulley is turned forward to raise the feed dog 1 from its lowest position until it is flush with the top of the needle plate lt a 1 Turn the machine pulley forward to raise the feed dog 1 Raise the front AN from its lowest position until it is flush with the top of the needle plate and stop turning the pulley at that point 2 LII M 2 Tilt back the machine head 4 a y Loosen the two set screws 4 NY Gs Q
14. in the oil window 1 70 ml of lubricating oil is added to the gearbox at the time of shipment from the factory Look at the oil window 1 from directly in front If the oil level is below the normal level add more lubricating oil as described in the following procedure lt Lubrication gt Remove the rubber cap 3 Add lubricating oil until the oil level is approximately 2 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 Insert the rubber cap 3 securely 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 28 6 CLEANING a 2 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 3 Carry out a test sewing 29 S 7220C 6 CLEANING 6 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 a
15. is returned to the neutral position and the sewing machine stops However after the treadle has been depressed backward and thread trimming has been carried out sewing using the treadle will no longer be possible 4 When the RESET key 2 is pressed the warning icon 1 will switch off and the display will return to showing the initial values Sewing using the treadle will then be possible S 7220C 20 4 USING THE OPERATION PANEL ADVANCED OPERATIONS 4 USING THE OPERATION PANEL ADVANCED OPERATIONS The operations described in this section should only be carried out by a technician 4 1 Names and functions 21 These are used for making advanced operating settings They should only be used by a technician 19 Slow start key When this key is pressed so that the slow start icon 20 illuminates the first two stitches sewn after the thread is trimmed are sewn at 700 sti min After this the sewing speed corresponds to the treadle depression amount If you press this key again while the icon 20 is illuminated the icon 20 will turn off 4186M 21 Correction key When this key is pressed so that the correction icon 22 illuminates correction sewing 4 can be carried out 4 If the sewing machine is stopped sewing will be carried out at slow speed 220 sti min while the actuator switch is being pressed NOTE If you press the actuator switch while sewing is in progress backt
16. qualified technician Turn off the power switch and disconnect the power cord from the wall outlet before replacing any parts otherwise the machine may operate if the treadle is pressed by mistake which could result in injury Secure the table so that it will not move when tilting back the machine head If the table moves it may crush your feet or cause other injuries 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 When replacing parts and installing optional accessories be sure to use only genuine Brother parts Brother will not be held responsible for any accidents or problems resulting from the use of non genuine parts 8 7220C lt Fixed knife gt 1 Tilt back the machine head 2 Remove the screw 1 and then remove the hook stopper 2 3 Remove the screw 3 and then remove the fixed knife 4 NOTE Carry out the above steps in reverse to install the fixed knife 4 Sharpening the fixed knife If the cutting performance deteriorates sharpen the fixed knife 4 on a whetstone 5 as shown in the illustration lt Movable knife gt 1 Remove the needle 2 Lift up the presser foot using the lifting lever 3 Remove the two screws 1 and then remove the needle plate 2 4 Turn the machine pulley to raise the needle b
17. the machine head may cause your hand to slip and your hand may get caught If an error occurs in machine operation or if abnormal noises or smells are noticed immediately turn off the power switch Then contact your nearest Brother dealer or a qualified technician If the machine develops a problem contact your nearest Brother dealer or a qualified technician A 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 Secure the table so that it will not move when tilting back the machine head If the table moves it may crush your feet or cause other injuries 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 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 Maintenance and inspection Maintenance and inspection of the sewing machine should only be carried out by a qualified technician Ask your Brother dealer or a qualified electrician to carry out any maintenance and
18. the neutral position the sewing machine will continue 2159M 4 End backtacking is carried out After it has finished the thread is trimmed automatically and ey o gt If the treadle is depressed backward before sewing of the set number of start backtack SSY stitches is complete end backtacking will not be carried out If the indicator of the thread trimming lock key is illuminated the sewing machine will 2160M 15 S 7220C 3 USING THE OPERATION PANEL BASIC OPERATIONS 3 3 Sewing continuous backtack stitches Example A gt 4 B gt 5 A IAIA JA C gt 5 D 4 V VJ LV Vv 0 99 0 99 0 99 0 99 4177M 2 If the treadle is simply depressed continuously the number of stitches set for A B C and D will be sewn in a single cycle the thread will be trimmed automatically and then the needle K bar will stop in the needle up position NOTE If the treadle is returned to the neutral position while continuous backtacking is being carried out the sewing machine will stop at the point where the treadle returns to the neutral position If the treadle is depressed again operation will resume from the point where it was interrupted If the indicator of the thread trimming lock key is illuminated the sewing machine will stop in the needle up position without thread trimming being carried out 2159M lt Automatic sewing gt When the AUTO key is pressed to turn on the automa
19. the trailing lengths of the upper threads too short after thread trimming Adjust the pretension Are the threads not being trimmed cleanly Sharpen the fixed knives or replace the fixed and movable knives if necessary Is the needle too wide Try using a needle with a count that is one lower than the current needle Is the length of thread trailing out from the bobbin case after thread trimming too short If the bobbin is spinning loosely replace the anti spin spring in the bobbin case Is the sewing speed too fast at the sewing start Use the slow start feature Is the needle up stop position too high Adjust the needle up stop position 32 21 22 6 Uneven seam 0473M 7 Large degree of puckering excess tension Jot x 0978M Is the presser foot pressure too weak Adjust the presser foot pressure Is the feed dog too low Adjust the feed dog height Is the bobbin scratched If the bobbin is damaged smooth it with an oiled grindstone or replace it Is the upper thread tension too strong Make the upper thread tension as weak as possible Is the lower thread tension too strong Make the lower thread tension as weak as possible Is the needle tip blunt Replace the needle if it is blunt Is the needle too thick Replace with as thin a needle as possible Are the thread take up spring tensions too strong Make the thread take up spring tension as weak as possible
20. to the machine 3 Warning labels The following warning labels appear on the sewing machine Please follow the instructions on the labels at all times when using the machine If the labels have been removed or are difficult to read please contact your nearest Brother dealer 1 AN BEERNS SNT AUVMEFSCEMHS MIRAE BD FREH BRED SPLOT OAN EIET TCE ENB Rohr AFAR ADANGER AGEFAHR A DANGER A PELIGRO Hazardous voltage will Hochspannung verletzungsgefahr Un voltage non adapte provoque Un voltaje inadecuado puede cause injury Turn off main Bitte schalten sie den hauptschalter des blessures Eteindre provocar las heridas Apagar el switch and wait 5minutes aus und warten sie 5 minuten l interrupteur et attendre 5 interruptor principal y esperar 5 before opening this cover bevor sie diese abdeckung ffnen minutes avantd ouvrir le capot minutos antes de abrir esta cubierta Touching areas where high voltages are present can 4 Be careful not to get your hands result in severe injury Turn off the power before caught when returning the opening the cover machine head to its original position after it has been tilted CAUTION _ Moving parts may cause injury Be careful to avoid injury from the moving thread take up Be sure to connect the ground If Operate with safety devices the ground connection is not installed secure you run a high risk of receiving a serious electric shock and problems with co
21. 1 3 mm for 405 specifications 1 Remove the presser foot 5 needle plate 6 and feed lt 4 3 gt 1 8 mm dog 7 lt 405 gt 2 2 mm 2 Set the stitch length dial as follows lt 4 3 gt Stitch length dial 0 setting lt 405 gt Stitch length dial 3 setting 3 Loosen two of the three set screws 9 which are securing the rotary hook 8 4 Turn the machine pulley to raise the needle bar 1 from its lowest position until the distance from needle plate mounting surface A to the bottom edge of the needle bar 1 is the same as the height of surface C on the lt 2 gt side of the accessory timing gauge 2 5 Loosen the remaining set screw 9 and align the rotary hook tip 3 with the center of the needle 4 There should be a gap of 0 0 1 mm between the rotary hook tip 3 and the needle 4 at this time Securely tighten the three set screws 9 Install the feed dog 7 needle plate 6 and presser foot 5 NO lt Presser foot including finger guard gt lt Clearance between rotary hook and hook stopper gt Check that the thread being used passes smoothly through the clearance between the rotary hook 8 and the hook stopper 10 The clearance is 0 4 to 0 7 mm for 4 3 specifications and 0 8 to 1 2 mm for 405 specifications lt A 3 gt 0 4 0 7 mm lt 405 gt 0 8 1 2 mm S 7220C 36 8 STANDARD ADJUSTMENTS 8 4 Adjusting of the feed dog height e ol Becomes
22. 163M 6 Fixed stitch key When this key is pressed so that the indicator illuminates the number of stitches 1 1999 in the E stitch number display is sewn and then the sewing machine stops automatically 4164M 13 S 7220C 3 USING THE OPERATION PANEL BASIC OPERATIONS Name label key pr When this key is pressed so that the indicator illuminates fixed stitch sewing of the number OE E of stitches 1 1999 in the E and F stitch number displays is carried out repeatedly t F 4165M Pleat presser sewing key When this key is pressed so that the indicator illuminates the number of backtack stitches 1 1999 in the E stitch number display can be sewn by pressing the actuator switch oO Ef v4 4166M 10 Thread trimming key This can only be set for use together with the fixed stitch key 6 or the name label key 7 When this key is pressed so that the indicator illuminates the set number of stitches start or end backtack stitches or fixed stitches are sewn and then the thread is trimmed automatically 4167M This can only be set for use together with the continuous backtack key 5 the fixed stitch key 6 or the name label key 7 When this key is pressed so that the indicator illuminates the set number of stitches start or end backtack stitches fixed stitches or thread trimming are sewn automatically simply by depressing the treadle once om O 4 gt O SOK x lt
23. CB connector is Power switch ON connected to connector P3 on the main PCB verification cannot Problem with drive PCB be carried out Replace the control box ne E71 0 Is the electrical equipment connector inside the control box disconnected Press the power OFF switch and then check that the drive PCB connector is Motor connected to connector P4 on the main PCB x overcurrent This is displayed if the machine pulley moves stiffly when it is turned by hand or if the sewing machine locks up and an abnormal current is flowing Press the power OFF switch and then turn the machine pulley by hand and check that it turns easily a This is displayed if there is some problem with the motor and an abnormal current is flowing Replace the motor x Problem with control box Replace the control box x E791 lt This is displayed when there is overcurrent in any of the solenoids thread trimming thread wiping quick reverse or presser lifter Solenoid Check the resistances of the solenoids overcurrent Problem with main PCB Replace the control box x E90 DIP switch No 4 inside the control box is set to ON Press the power OFF switch and set DIP switch No 4 to OFF 47 If an error code that is not listed above appears or if carrying out the specified remedy does not solve the problem contact the place of purchase 8 7220C 50 10 7 SEGMENT DISPLAY 10 7 SEGMENT DISPLAY 4268M S 7220C 51 MEMO
24. S 7220C INSTRUCTION MANUAL Please read this manual before using the machine Please keep this manual within easy reach for quick reference SINGLE NEEDLE DIRECT DRIVE NEEDLE FEED LOCK STITCHER WITH THREAD TRIMMER Thank you very much for buying a BROTHER sewing machine Before using your new machine please read the safety instructions and the explanations given in the instruction manual With industrial sewing machines it is normal to carry out work while positioned directly in front of moving parts such as the needle and thread take up and consequently there is always a danger of injury that can be caused by these parts Follow the instructions from training personnel and instructors regarding safe and correct operation before operating the machine so that you will know how to use it correctly S 7220C SAFETY INSTRUCTIONS 1 Safety indications and their meanings This instruction manual and the indications and symbols that are used on the machine itself are provided in order to ensure safe operation of this machine and to prevent accidents and injury to yourself or other people The meanings of these indications and symbols are given below Indications DANG ER The instructions which follow this term indicate situations where failure to follow the instructions will result in death or serious injury A WARNING The instructions which follow this term indicate situations where failure to follow the instructions could result in dea
25. a single outlet this may cause voltage drops which will in turn cause the reset function to activate and stop the machine even if the power supply itself is normal 17 45 8 7220C 9 TROUBLESHOOTING Problem Possible cause Page 17 Nothing appears on the Is the power supply connector operation panel display disconnected from the control box Insert the connector securely 11 12 Is the operation panel connector inside the control box disconnected 9 Insert the connector securely p7 4264M 18 GrEASEUP flashes in This display is to notify you that it is time to apply grease the panel display when the Apply grease 30 power switch is turned on S 7220C 46 9 TROUBLESHOOTING 9 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 then turn the power back on Items with a in the Page column should only be checked by a qualified technician For items with appearing in the Page column ask the place of purchase for advice lt Connector and DIP switch layout diagram gt Main PCB 4266M Error code Possible cause Page E050 The machine head was detected as being tilted b
26. ack stitches will be sewn Correction sewing cannot be carried out while the indicator of the pleat presser sewing key 8 is illuminated If you press this key again while the icon 22 is illuminated the icon 22 will turn off 4187M 23 Needle up down key Use this key to select whether the needle bar stops in the up position or the down position LA when the treadle is returned to the neutral position and sewing stops z When the needle up icon 24 is illuminated the needle bar stops in the up position When the needle down icon 25 is illuminated the needle bar stops in the down position 4188M 2207M 2208M 21 S 7220C 4 USING THE OPERATION PANEL ADVANCED OPERATIONS 4 2 Adjusting the needle up stop position 1 4189M 2138M While pressing the Z key 1 press the power ON switch MorG xxx will appear in orange in the main display 2 Selecting UpoS xxx xxx is the setting value for the needle up stop position and 0 is the default setting XXX Setting value Press once 4190M 3 Needle up stop position setting If you press the A key the setting value will increase and the needle up stop position will become lower If you press the key the setting value will decrease and the needle up stop position will become higher The setting range is from 5 to 10 A setting value of 10 corresponds to an angle of rotation of approximat
27. ack when the treadle was depressed Press the power OFF switch and then return the machine head to the upright position If tilting back the machine head to carry out any tasks press the power OFF switch first E05 lt The machine head was detected as being tilted back during sewing Turn the power off and then back on again E055 Was the power ON switch pressed while the machine head was still tilted back Press the power OFF switch and then return the machine head to the upright position Is the 14 pin machine connector inside the control box disconnected Press the power OFF switch and then check that the 14 pin machine connector is connected to connector P13 on the main PCB 9 E065 Was the power ON switch pressed while an invalid key was being pressed on the operation panel Press the power OFF switch and check that no operation panel keys are being pressed There is a malfunction of the operation panel Replace the operation panel x E066 Was the actuator switch being pressed when the power ON switch was pressed Press the power OFF switch and check that the actuator switch is not being pressed There is a problem with the actuator switch Replace the actuator switch 4 47 S 7220C 9 TROUBLESHOOTING Error code Possible cause Page E090 Is the 4 pin treadle connector inside the control box disconnected Press the power OFF switch and then check that the 4 pin treadle connector is
28. adjustment screw 4 so that there is no pressure applied to the presser foot Raise the lifting lever 2 The presser foot 1 will also rise Remove the oil cap 5 Loosen the bolt 6 and then move the presser bar 7 up or down until the presser foot 1 is at the standard height of 6 mm Tighten the bolt 6 Replace the oil cap 5 Adjust the presser foot pressure using the adjustment screw 4 and then tighten the nut 3 NOTE After adjusting check that the needle moves down into the center of the groove in the presser foot 40 8 STANDARD ADJUSTMENTS 8 9 Adjusting the rotary hook lubrication amount AXCAUTION A Be careful not to touch your fingers or the lubrication amount check sheet against moving parts such as the rotary hook or the feed mechanism when checking the amount of oil supplied to the rotary hook otherwise injury may result Use the following procedure to check the amount of oil being supplied to the rotary hook when replacing the rotary hook or when changing the sewing speed lt Checking the lubrication amount gt 1 Remove the thread from all points from the thread take up Approx 25mm to the needle 2 Use the lifting lever to lift the presser foot 3 Run the machine at the normal sewing speed for lag 1 approximately 1 minute without sewing any material Approx 70mm following the same start stop pattern as when actually sewing 4 Place the lubrication amo
29. ar to its highest position Tilt back the machine head Push the thread trimmer lever 3 by hand in the direction of the arrow until the two screws 4 can be seen 7 Remove the two screws 4 and then remove the movable knife 5 NOTE Carry out the above steps in reverse to install the movable knife 5 32 8 STANDARD ADJUSTMENTS CAUTION Q A A 33 Maintenance and inspection of the sewing machine should only be carried out by a qualified technician Ask your Brother dealer or a qualified electrician to carry out any maintenance and inspection of the electrical system If any safety devices have been removed be absolutely sure to re install them to their original positions and check that they operate correctly before using the machine Secure the table so that it will not move when tilting back the machine head If the table moves it may crush your feet or cause other injuries 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 A A S 7220C Turn off the power switch and disconnect the power cord from the wall outlet at the following times otherwise the machine may operate if the treadle is depressed by mistake which could result in injury When carrying out inspection adjustment and maintenance When replacing
30. consumable parts such as the rotary hook and knife If the power switch needs to be left on when carrying out some adjustment be extremely careful to observe all safety precautions 8 STANDARD ADJUSTMENTS 8 1 Adjusting the safety switch position The safety switch 1 is normally installed as shown in figure A However if the processing method used for the table leaves too much space between the machine head and the table hole it may adversely affect the operation of the safety switch 1 lt Adjustment method gt The standard amount of clearance between the machine head and the table hole is 1 5 mm If the clearance is 3 5 mm or more install the safety switch 1 so that the washer 2 is on the machine head side as shown in Figure B If the position cannot be satisfactorily adjusted in this way add more washers of the same thickness lt Safety switch operation gt 3691M If the spring stroke is to small the safety switch will not operate 3 5 mm or more Clearance is too large gt By changing the position of the safety switch the required spring stroke can be maintained Reduce the clearance S 7220C 34 8 STANDARD ADJUSTMENTS 8 2 Adjusting the needle bar height Adjust so that the distance from needle plate mounting surface A to the bottom edge of the needle bar 1 is the same as the height of surface B on the lt 1 gt side of the accessory timing gauge 2 w
31. cs Power cord ao nn eS OANDOARW Serer rrr a 1 Attach an appropriate plug to the power cord 9 The green and yellow wire is the ground wire 2 Insert the power plug into a properly grounded electrical outlet NOTE Take care when tapping in the staples 7 to make sure that they do not pierce the cords Do not use extension cords otherwise machine operation problems may result Green and yellow wire ground wire S 7220C 12 3 USING THE OPERATION PANEL BASIC OPERATIONS 3 USING THE OPERATION PANEL BASIC OPERATIONS 3 1 Names and functions The operation panel keys cannot be operated while sewing is in progress Select the keys and set the number of stitches before starting sewing In the case of keys with indicators the indicator illuminates when that function is operating and the indicator switches off when the key is pressed once more Power indicator 1 12 11 16 15 17 18 14 The power indicator illuminates when the power switch is turned on 1 Main display In start backtack display AB illuminates and the number of stitches for A and B are displayed In end backtack display CD illuminates and the number of stitches for C and D are displayed In continuous backtack display ABCD illuminates and the number of stitches for A B C and D are displayed
32. de 1 can be seen Apply grease to the slide block guide 1 in the places shown in the illustration 0561D Turn the power switch to OFF Remove the screws Apply grease to each of the holes until the grease overflows slightly The grease will be pushed in when the screws are tightened Turn the machine pulley by hand to move the needle bar up and down several times in order to disperse the grease Use a cloth to wipe away any excess grease from around the screws Carry out the reset procedure given below lt Resetting the grease consumption amount gt After the grease has been applied carry out the following procedure to reset the grease consumption amount While pressing the A key 3 and the 7 key 4 at the right end simultaneously press the power ON switch GuCt xxx will appear in the main display 1 xxx represents the amount of grease consumed For example 100 means that 100 of the grease has been consumed Press the RESET key 2 for two seconds or more The main display 1 will change to GuCt 0 Press the ENTER key 5 The main display 1 will change to stitch number display mode and treadle operation will be possible This completes the reset procedure 2138M 2139M 7 REPLACING THE FIXED KNIFE AND MOVABLE KNIFE 7 REPLACING THE FIXED KNIFE AND MOVABLE KNIFE A CAUTION Replacement of parts should only be carried out by a
33. dle tip broken or is the needle hole blocked Replace the needle e Is the needle and rotary hook timing correct Adjust the height of the needle bar Adjust the clearance between the needle and the tip of the rotary hook e Is the needle and feed mechanism timing correct Adjust to the standard timing Caution 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 whole of the needle is found again Furthermore we recommend that through steps be taken to account for such needles to comply with product liability regulations 35 36 39 13 Oil gauge 1 is not visible in oil gauge window 1 4262M e Is the oil tank empty Fill the oil tank with oil 14 Machine does not operate when power is turned on and treadle is pressed e Is the power supply connector disconnected from the control box Insert the securely connector 4263M 11 12 15 Machine does not operate at high speed e Is the sewing speed setting or backtack speed setting incorrect Use the sewing speed control keys to set the high speed 14 16 Machine sewing stops during e Is the fixed stitch key turned on Press the fixed stitch key so that the indicator turns off e ls the power supply voltage too low Check the power supply If the power cord is too long or too many appliances are being run from
34. e sure to connect the ground If the ground by mistake which could result in injury connection is not secure you run a high risk of receiving a serious electric shock and problems with correct operation may also occur 2 4 1 Opening the control box cover 1 Screw 2 Cover 2 4 2 Connecting the cords 1 Sewing machine cords S 7220C 8 2 INSTALLATION Push in securely until the tabs 6 engage lt Removal gt Press the tab lt Securing gt Cords A ON lt Closing the cover gt E Sele VO w S 7220C 1 6 pin head detector unit connector 2 12 pin operation panel connector 3 10 pin resolver connector 4 14 pin machine connector 5 4 pin motor connector 2 Binding the cords 1 Repeat cable tie NOTE Bind the cords in such a way that the connector does not get pulled out All cords that come out from the control box should be secured to the cord holder 2 using the repeat cable tie 1 otherwise vibration from the sewing machine may cause the cords to become disconnected which can cause problems with the operation of the control box 2 INSTALLATION Ground symbol Ground symbol lt Seen from underneath table gt Control box Green and yellow wire ground wire 8 7220C 3 Ground wire a
35. ect thread the thread correctly 29 Is the rotary hook sufficiently lubricated If the oil gauge is down to the lower reference line in the oil gauge window add more oil 7 Is the upper or lower thread tension too weak or too strong Adjust the upper thread or lower thread tension Is the upper thread may be loose because the thread take up spring operating range is too small Adjust the position of the thread take up spring Is the rotary hook feed dog or other part damaged If they are damaged smooth them with an oiled grindstone or replace the damaged parts Is the thread path damaged If the thread path is damaged smooth it with sandpaper or replace the damaged part 0471M 10 Incorrect thread trimming Is the fixed knife or movable knife damaged or worn Upper and lower threads Replace the fixed knife or the movable knife 32 are both not being trimmed 11 Incorrect thread trimming Is the needle properly installed Upper thread or lower If it is incorrect install the needle correctly thread is not being Is the fixed knife or movable knife blunt 32 trimmed Replace the fixed knife or the movable knife S 7220C 44 9 TROUBLESHOOTING Problem Possible cause Page 12 Broken needles 0469M e Is the material being pushed or pulled with excessive force during sewing e Is the needle properly installed If it is incorrect install the needle correctly e Is the needle bent is the nee
36. ed when the motor becomes abnormally hot and the temperature protection has activated Motor is After the temperature has dropped press the power ON switch and operate the overheating sewing machine as normal E 5 Is the connector inside the motor disconnected Press the power OFF switch and then check x Problem with that the connector is securely inserted motor overheating sensor Malfunction of motor overheating sensor Replace the motor 4267M E1 90 This appears on the display when the sewing machine has been operating continuously for 3 minutes or more Motor timeout Turn the power switch off and then back on again and then operate the sewing machine normally E 9 This is displayed if the sewing machine motor locks during thread trimming Remove any thread scraps that may be blocking the motor Thread trimming Check that there are no problems with the thread trimming mechanism solenoid timeout E41 0 Is the 12 pin operation panel connector inside the control box disconnected Press the power OFF switch and then check that the 12 pin operation panel Error connector is connected to connector P7 on the main PCB 9s communicating with operation panel E440 Problem with main PCB Replace the control box be Error writing data to main PCB E441 Problem with main PCB Replace the control box ty Error reading data from main PCB E442 The data on the main PCB is corrupted Corrupt data was initalized Turn the power of
37. eeees 8 10 7 SEGMENT DISPLAYV 0 eee 51 2 4 1 Opening the control box cover 8 2 4 2 Connecting the Cords 8 3 USING THE OPERATION PANEL BASIC OPERATIONS sssssssseee00 13 3 1 Names and functions 0 cceeeeeeeeeeeeeeeees 13 3 2 Sewing start and end backtack stitches 15 3 3 Sewing continuous backtack stitches 16 3 4 Sewing fixed stitches cccceeeeeseeeeereeeee 17 3 5 Sewing name labels ccceesseeeesesseeeeeeees 18 3 6 Sewing pleat presser stitches ccee 19 3 7 Using the lower thread counter 06 20 4 USING THE OPERATION PANEL ADVANCED OPERATIONS 21 4 1 Names and functions 0 ccceeeeeeeeeeeeeees 21 4 2 Adjusting the needle up stop position 22 4 3 LOGK KOY aoira aaao auena austell 23 4 4 Resetting all settings to their defaults 24 5 SEWING ia iena nni 25 5 1 Adjusting the presser foot floating amount minute lifting amount sssssssseeseeeeeesneeenenenenna 25 5 2 Sewing condensed stitches cc ccceeerees 26 6 CLEANING ssesstccissteitrniccnciscintannn 27 6 1 Daily cleaning procedures eceeeeeeeeees 27 6 2 Applying grease When GrEASEUP ADPCAMIS ss PEATE ETE ETT 30 7 REPLACING THE FIXED KNIFE AND MOVABLE KNIFE cccccsssssssseeeeeees 32 8 STANDARD ADJUSTMENTG 33 8 1 Adjusting the safety switch posit
38. ely 10 for the upper shaft Becomes higher Becomes lower 0557D 2138M 2139M The setting values will be memorized 4192M Normal sewing machine operation will then be possible 4198M For details on other adjustment items refer to the Service Manual S 7220C 22 4 USING THE OPERATION PANEL ADVANCED OPERATIONS 4 3 LOCK key When the power switch is turned on the LOCK key 1 turns ON The icon 2 is illuminated In this state the following three key operations are disabled so that the setting values cannot be changed accidentally FUNC key 3 This key is used to make settings for various functions san HH ENTER key 4 rf 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 23 S 7220C 4 USING THE OPERATION PANEL ADVANCED OPERATIONS 4 4 Resetting all settings to their defaults If the sewing machine stops operating normally the cause may be that an incorrect setting may have been made for the memory data by means of memory switches for instance In such cases it may be possible to restore normal operation by following the steps given below to initialize the memory setting data 1 Activating initialization mode 4195M 1 While pressing the RESET key press the power ON switch init ALL will appear in orange in the main dis
39. f and then back on again Problem with data on main PCB E450 Model selection could not be loaded from the head detector unit Check that the head detector unit specifications are correct rs E45 Problem with head detector unit Replace the head detector unit e Error writing data to head detector unit E452 Is the 6 pin head detector unit connector inside the control box disconnected Press the power OFF switch and then check that the 6 pin head detector unit Head detector unit connector is connected to connector P8 on the main PCB 9 connection error 49 S 7220C 9 TROUBLESHOOTING Error code Possible cause Page E453 There is a problem with the head detector unit counting data The counting data was initialized Abnormal head Turn the power off and then back on again detection counting data E70 Does the power supply voltage match the control box voltage specifications Check that the voltage matches Abnormally high Is the power supply voltage abnormally high power supply Check the power supply voltage voltage Problem with control box Replace the control box xx E705 Is the power supply voltage abnormally low Check the power supply voltage Abnormally low Problem with control box power supply Replace the control box voltage E709 Is the electrical equipment connector inside the control box disconnected Press the power OFF switch and then check that the drive P
40. hen the needle bar 1 is at its lowest position as shown in the illustration 1 Remove the presser foot 3 the needle plate 4 and the feed dog 5 2 Turn the machine pulley to set the needle bar 1 to its lowest position 3 Remove the rubber cap 6 from the face plate 4 Loosen the screw 7 5 Move the needle bar 1 up or down to adjust so that the distance from needle plate mounting surface A to the bottom edge of the needle bar 1 is the same as the height of surface B on the lt 1 gt side of the accessory timing gauge 2 Securely tighten the screw 7 Install the rubber cap 6 Install the feed dog 5 the needle plate 4 and the presser foot 3 OND lt Presser foot including finger guard gt 35 S 7220C 8 STANDARD ADJUSTMENTS 8 3 Adjusting the needle and rotary hook timing When the machine pulley is turned forward to raise the lt 4 3 gt needle bar 1 1 8 mm 2 2 mm for 405 specifications from 0 5 1 0mm its lowest position the rotary hook tip 3 should be aligned C lt 405 gt with the center of the needle 4 as shown in the illustration 0 8 1 3mm when the distance from needle plate mounting surface A to the bottom edge of the needle bar 1 is the same as the height of surface C on the lt 2 gt side of the accessory timing gauge 2 At this time the gap between the upper edge of the needle hole and the rotary hook tip 8 will be 0 5 1 0 mm 0 8
41. hook 403 433 405 Lubricated Lubricated for medium materials for heavy materials Lubricating oil 403 405 433 Rotary hook High speed spindle Needle bar High speed spindle Special Brother grease 1 S 7220C 2 INSTALLATION 2 INSTALLATION A CAUTION Machine installation should only be carried out by a qualified technician Contact your Brother dealer or a qualified electrician for any electrical work that may need to be done The sewing machine weighs approximately 46 kg 101 Ib The installation should be carried out by two or more people Do not connect the power cord until installation is complete The machine may operate if the treadle is depressed by mistake which could result in injury Secure the table so that it will not move when tilting back the machine head If the table moves it may crush your feet or cause other injuries 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 About the machine set up location Do not set up this sewing machine near other equipment such as televisions radios or cordless telephones otherwise such equipment may be affected by electronic interference from the sewing machine The sewing machine should be plugged directly into an AC wall outlet Operation problems
42. inspection of the electrical system Turn off the power switch and disconnect the power cord from the wall outlet at the following times otherwise the machine may operate if the treadle is depressed by mistake which could result in injury e When carrying out inspection adjustment and maintenance e When replacing consumable parts such as the rotary hook and knife If the power switch needs to be left on when carrying out some adjustment be extremely careful to observe all safety precautions Secure the table so that it will not move when tilting back the machine head If the table moves it may crush your feet or cause other injuries A G S S 7220C 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 When replacing parts and installing optional accessories be sure to use only genuine Brother parts Brother will not be held responsible for any accidents or problems resulting from the use of non genuine parts If any safety devices have been removed be absolutely sure to re install them to their original positions and check that they operate correctly before using the machine To prevent accidents and problems do not modify the machine yourself Brother will not be held responsible for any accidents or problems resulting from modifications made
43. ion 34 8 2 Adjusting the needle bar height 35 8 3 Adjusting the needle and rotary NOOK timing anaes nia 36 8 4 Adjusting of the feed dog height 4 37 8 5 Adjusting the feed dog angle eee 38 8 6 Adjusting the needle and feed mechanism inatin EAEE EE EA E thas caneeaaets 39 8 7 Adjusting arm thread guide R 5 40 8 8 Adjusting the presser foot height 40 8 7220C S 7220C 1 MACHINE SPECIFICATIONS 1 MACHINE SPECIFICATIONS 4 Quick reverse O Thread wiper O BROTHER INDUSTRIE 0 3 Lubrication type Minimum lubrication Semi dry 3 5 Use For medium weight For heavy weight materials vor materials 403 433 405 Max sewing speed 5 000 sti min 4 000 sti min 4 000 sti min Start backtacking and continuous backtacking speed 220 3 000 sti min End backtacking speed 1 800 sti min Max stitch length 4 5mm 5 5mm Presser foot Lifting lever 6mm height Knee lifter 16mm Feed dog height 1 0mm 1 2mm Needle DBx1 DPx5 11 18 19 22 Motor AC servo motor Control circuit Microprocessor When sewing at speeds of 4 000 sti min or higher set the stitch length to 3 5 mm or less 2 When sewing at speeds of 3 000 sti min or higher set the stitch length to 4 5 mm or less Rotary
44. ions 1 Rubber cushions 2 pcs 2 Nails 4 pcs 5 Knee lifter complying bar 3 Knee lifter complying bar 6 Machine head 1 Hinges 2 pcs 2 Machine head 3 Head rest NOTE Tap the head rest 3 securely into the table hole If the head rest 3 is not pushed in as far as it will go the machine head will not be sufficiently stable when it is tilted back S 7220C 4 2 INSTALLATION 7 Operation panel 1 Operation panel 2 Washers 2 pcs 3 Screws 2 pcs Use the washers 2 and the screws 3 which are secured to the side plate 8 Sticker Remove 1 Sticker 9 Cotton stand 1 Cotton stand NOTE Securely tighten the nut 4 so that the two rubber cushions 2 and the washer 3 are securely clamped and so that the cotton stand 1 does not move 5 S 7220C 2 INSTALLATION i Within 16 mm 0553D 10 Knee lifter plate 1 Knee lifter plate 2 Bolt Loosen the bolt 3 and the bolt 4 and then adjust the position of the knee lifter plate 1 so that it is easy to use lt Knee lifter adjustment gt 1 2 S 7220C Turn the machine pulley so that the feed dog is below the top of the needle plate Lower the presser foot 6 by using the lifting lever 5 Loosen the nut 7 Turn the screw 9 to adjust so that the amount of play in the knee lifter 8 is approximately 2 mm when the knee lifter plate 1 is gently pressed
45. k stitches in C and D press the fixed stitch key to temporarily turn off the fixed stitch function before making the change The CD display will show the number of stitches and the setting can then be changed 17 S 7220C 3 USING THE OPERATION PANEL BASIC OPERATIONS 3 5 Sewing name labels 4179M Example E gt 12 F gt 24 VIV V V 1219 1219 0 99 0 99 From 1 to 1999 stitches can be set for the E and F stitch numbers K After the set number of stitches in E fixed stitches have been sewn the needle bar stops in the position that has been set by the needle up down key refer to p 21 N 2159M After the set number of stitches in F fixed stitches have been sewn the needle bar stops in the position that has been set by the needle up down key refer to p 21 25 K Repeat steps 2 and 3 above D gt A Thread trimming is carried out Sve z lt Automatic thread trimming gt Press the thread trimming key to turn on the thread trimming function Thread trimming is carried out automatically after the second set of F stitches has been sewn lt Automatic sewing gt When the AUTO key is pressed to turn on the automatic sewing function the fixed stitches in E and F O are sewn respectively simply by depressing the treadle once without needing to depress it AUTO continuously lt Start and end backtack sewing gt A The start backtack key
46. l out of the reach of children Ay CAUTION Sewing This sewing machine should only be used by operators who have received the necessary training in safe use beforehand The sewing machine should not be used for any applications other than sewing Be sure to wear protective goggles when using the machine If goggles are not worn there is the danger that if a needle breaks parts of the broken needle may enter your eyes and 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 When threading the needle e When replacing the bobbin and needle e When not using the machine and when leaving the machine unattended If using a work table which has casters the casters should be secured in such a way so that they cannot move A A A A 0 Attach all safety devices before using the sewing machine If the machine is used without these devices attached injury may result 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 Secure the table so that it will not move when tilting back the machine head If the table moves it may crush your feet or cause other injuries 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
47. lower thread counter can be used to let you know approximately how much lower thread is remaining e The value displayed by the lower thread counter display is reduced by 1 from the initial setting value each time the sewing machine sews 10 stitches and a warning is given when the counter goes below 0 lt Initial value setting gt 1 After about 2 seconds the buzzer will sound and the lower thread counter display will show the initial value which was set previously 4182M 2 e When the key is pressed the setting increases e When the key is pressed the setting decreases e If you hold down the keys the setting will change more quickly e Ifa value of 0 is set the lower thread counter will not operate e The initial setting value will be accepted when sewing starts 4183M lt Lower thread counter operation gt Initial value Reduces by 1 Buzzer sounds for 5 seconds Sewing is possible for every 10 1 until thread trimming stitches sewn is carried out Sil Press the RESET key 2 1 When sewing is carried out the value shown in the lower thread counter display is reduced by 1 for every 10 stitches sewn When the value goes below zero 0 a minus sign appears and counting continues to a maximum of 999 2 When the value goes below 0 a warning icon 1 illuminates and an electronic buzzer sounds for 5 seconds 3 Sewing will be possible even after the treadle
48. may result if extension cords are used 2086M Carrying the machine The machine should be carried by the arm by two people as shown in the illustration Hold the motor cover A by hand also so that the pulley does not rotate Tilting back the machine head L Hold section B with your foot so that the table does not move and then push the arm with both hands to tilt back the machine head 2088M Returning the machine head to the upright position 1 Clear away any tools etc which may be near the table holes 2 While holding the face plate with your left hand gently return the machine head to the upright position with your right hand S 7220C 2 INSTALLATION 2 1 Table processing diagram The top of the table should be 40 mm in thickness and should be strong enough to hold the weight and with stand the vibration of the sewing machine Drill holes as indicated in the illustration below Cotton stand hole Cord hole I Head rest hole Control box mounting hole 2 2 Installation 1 Control box 1 Control box 2 Bolts 8 pcs 3 Nuts 3 pcs 4 Spring washers 3 pcs 5 Washers 3 pcs 2 Connecting rod 6 Connecting rod 7 Nut 3 S 7220C 2 INSTALLATION 3 Oil pan 1 Head cushions left 2 pcs 2 Head cushions right 2 pcs 3 Oil pan 4 Rubber cush
49. ne in an area which is free from sources of strong electrical noise such as electrical line noise or static electric noise Sources of strong electrical noise may cause problems with correct operation Any fluctuations in the power supply voltage should be within 10 of the rated voltage for the machine Voltage fluctuations which are greater than this may cause problems with correct operation The power supply capacity should be greater than the requirements for the sewing machine s power consumption Insufficient power supply capacity may cause problems with correct operation The ambient temperature should be within the range of 5 C to 35 C during use Temperatures which are lower or higher than this may cause problems with correct operation The relative humidity should be within the range of 45 to 85 during use and no dew formation should occur in any devices Excessively dry or humid environments and dew formation may cause problems with correct operation In the event of an electrical storm turn off the power and disconnect the power cord from the wall outlet Lightning may cause problems with correct operation Installation S Machine installation should only be carried out by a qualified technician Contact your Brother dealer or a qualified electrician for any electrical work that may need to be done The sewing machine weighs approximately 46 kg 101 lb The installation should be carried out
50. ot turning smoothly Pull out the lower thread to check that there is no slackness in the thread tension or replace the bobbin or bobbin case ISS SS SISIISTI i 0977M 4 Skipped stitches occur e Is the needle tip bent Is the needle tip blunt while sewing If the needle tip is bent or broken replace the needle e Is the needle properly installed See If it is incorrect install the needle correctly oe e Is the machine properly threaded se If it is incorrect thread the thread correctly 29 e Is the presser foot pressure too weak Adjust the presser foot pressure e Is the needle too thin Replace the needle with a needle that is one rank thicker e Is the presser foot too high Adjust the height of the presser foot 40 e Is the thread take up spring too weak Adjust the tension of the thread take up spring e Is the needle and rotary hook timing correct Adjust the height of the needle bar 35 Adjust the clearance between the needle and the tip of the 36 rotary hook 0470M S 7220C 42 9 TROUBLESHOOTING Problem Possible cause Page 5 Skipped stitches at sewing start Thread sewing start unravelling at ae x 0749M Is the thread take up spring tension too strong Reduce the tension of the thread take up spring Is the thread take up spring operating range too large Lower the position of the thread take up spring Are
51. out half way along the straight section A of the nozzle Loosen and remove the nozzle and then remove the seal 2 Tighten the nozzle Tilt back the machine head Remove the rubber cap 3 and pour 120ml of lubricating oil into the oil tank 4 Use the upper reference line 5 as a guide when pouring Replace the rubber cap 3 Return the machine head to its original position Check that the oil gauge 7 comes to the upper reference line in the oil gauge window 6 lt Lubrication oil replenishment interval gt If the oil gauge 7 drops below the lower reference line or if the oil level drops below the lower reference line 8 on the oil tank 4 be sure to replenish the oil 2 INSTALLATION 2 4 Connecting the cords A DANGER Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet before opening the cover of the control box Touching areas where high voltages are present can result in severe injury CAUTION Contact your Brother dealer or a qualified electrician Q When securing the cords do not bend the cords for any electrical work that may need to be done excessively or fasten them too hard with staples D t th d until all ds h otherwise there is the danger that fire or electric o not connect the power cord until all cords have shocks could occ r been connected The machine may operate if the treadle is depressed B
52. perations 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 Lubrication A Oil tank oil quantity Check the oil gauge window 1 and add more oil if the oil gauge 2 is below the lower reference line Refer to page 7 Upper reference Lower reference line 27 S 7220C ae a a Sy gt gt EROE Approx 2 mm q 1 2 1 2 S 7220C 6 CLEANING Gearbox oil quantity NOTE e 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 e 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 3 refer to page 4 lt Checking the oil quantity gt The oil level should normally be approximately 2 mm above the center reference line
53. play 1 Reference If the AV keys 2 are pressed at this time you can select the items to be initialized as shown below For details on initialization items other than init ALL refer to the Service Manual Main display Initialization items init ALL Clears all settings init MEM Initializes memory switches init SPd Initializes sewing speed init SEW Initializes programs 4196M 2138M 2139M Once initialization is complete the main display will return to green 4192M Initialization mode will be exited and normal sewing machine operation will then be possible 4193M S 7220C 24 5 SEWING 5 SEWING A CAUTION Turn off the power switch before carrying out this operation The machine may operate if the treadle is depressed by mistake which could result in injury Secure the table so that it will not move when tilting back the machine head If the table moves it may crush your feet or cause other injuries 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 5 1 Adjusting the presser foot floating amount minute lifting amount When sewing stretch materials and materials with long pile you can make minute adjustments to the floating amount for the pres
54. re used to set the initial value for the lower thread counter Refer to 3 7 Using the lower thread counter 4170M 17 RESET key S This key is used to return the lower thread counter to its initial value and to cancel warning 7 conditions Refer to 3 7 Using the lower thread counter RESET 4173M 18 Thread wiper key When this key is pressed so that the indicator illuminates the thread wiper operates When the indicator of the thread trimming lock key 13 is illuminated the thread wiper key 18 is disabled If you press the thread trimming lock key 13 so that its indicator illuminates while the indicator of the thread wiper key 18 is illuminated the indicator of the thread wiper key 18 will switch off Ge 4174M S 7220C 14 3 USING THE OPERATION PANEL BASIC OPERATIONS 3 2 Sewing start and end backtack stitches For example 3 stitches and 4 stitches A gt 3 B gt 4 4175M 2 Setting end backtack stitches Example C 13 D 12 the treadle remains depressed operating until the set number of start backtack stitches has been sewn the sewing machine stops in the needle up position NOTE stop in the needle up position without thread trimming being carried out C 0 99 D 0 99 4176M 3 a Start backtacking is carried out After it has finished normal sewing continues for as long as KY c gt NOTE 0 If the treadle is returned to
55. rrect Turn off the power before operation may also occur OVE 5 carrying out operations such Direction of operation as threading changing the 2 LAIN k needle bobbin knives or a l S3 PAN hook cleaning and adjusting Safety devices A Finger guard B Thread take up cover Lubricating Oil for Machining ACAUTION Lubricating oil may cause inflammation to eye and skin Wear protective glasses and gloves Swallowing oil can cause diarrhoea and vomiting Do not swallow Keep away from children FIRST AID Eye contact Rinse with plenty of cold water Seek medical help Skin contact Wash with soap and water If swallowed Seek medical help immediately A iv S 7220C Transformer box 100 V 400 V system only Control box S 7220C v CONTENTS 1 MACHINE SPECIFICATIONG 1 8 9 Adjusting the rotary hook lubrication AMOUM si cacissieecede anneo caved deadavapreeedt E oa eai 41 2 INSTALLATION EETEETELELETELELETELELETELELELELETELECET 2 9 TROUBLESHOOTING Ride vide tees hae ania 42 2 1 Table p ocSssIng AGTA i eee cr ae 3 9 1 SOWING enoa aa aR E 42 2 2 installation E E che nee ti rasee Arete ets 3 9 2 Error code displays cccccssssssssecsssssssssssseseeee 47 2 3 Lubrication 2 ee eeeececeeeeeeeeeeeeeeeeeeeetenennaeeeeees 7 2 4 Connecting the COrdS cccseseseseceseet
56. ser foot 1 in accordance with the material 1 Turn the sewing machine pulley by hand to move the feed dog 2 below the needle plate 3 1 2 Use the lifting lever to lower the presser foot 1 S 3 Loosen the nut 4 4 Use a screwdriver to turn the adjustment screw 5 to ULIT Floating amount adjust the floating amount To raise the presser foot 1 Turn the adjusting screw 5 clockwise To lower the presser foot 1 Turn the adjusting screw 5 counterclockwise 5 Tighten the nut 4 After making the adjustment sew a piece of material to check the floating amount 25 S 7220C 5 SEWING 5 2 Sewing condensed stitches l Sewing direction Condensed stitches 0567D lt lt 1 2 3 4 5 6 1 AON If you press the actuator switch 1 or the reverse lever 2 while sewing is in progress you can sew stitches forward direction with small stitch lengths Before carrying out sewing set the stitch length for condensed stitches as follows Setting gt Lift up the dial lock lever 3 to release the lock Turn the stitch length dial 4 to the stitch length to be used for condensed stitches Tilt back the machine head Loosen the nut 5 and then turn the bolt 6 until its head is touching the solenoid lever 7 Tighten the nut 5 to secure the bolt 6 Return the machine head to its normal position Sewing gt Return the
57. stitch length dial 4 to the stitch length for normal sewing Push down the dial lock lever 3 to engage the lock Start sewing At the position where you would like to start sewing condensed stitches press the actuator switch 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 S 7220C 26 6 CLEANING 6 CLEANING A CAUTION A 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 Secure the table so that it will not move when tilting back the machine head If the table moves it may crush your feet or cause other injuries 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 6 1 Daily cleaning procedures The followinig cleaning o
58. t this time even if the treadle is depressed Apply grease as required while referring to the following for details mI lt To continue sewing without applying grease gt 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 NOTE If you do not apply grease when the GrEASEUP notification flashes the notification will continue to 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 100 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 If you continue to use the sewing machine after carrying out the reset procedure but without applying grease problems with the sewing machine may result lt Applying grease gt Use Brother specified Grease unit SA8837 001 Using the tube ENN gt S amp S X S 7220C 30 6 CLEANING lt 403 405 433 specifications gt 1 2 oR 31 S 7220C lt 433 specifications gt grease Turn the pulley to raise the needle bar to a position where the slide block gui
59. th or serious injury A CAUTION The instructions which follow this term indicate situations where failure to follow the instructions may result in minor or moderate injury Symbols A oie sen This symbol A indicates something that you should be careful of The picture inside the triangle indicates the nature of the caution that must be taken For example the symbol at left means beware of injury S need a This symbol S indicates something that you must not do GE PEON ETE This symbol indicates something that you must do The picture inside the circle indicates the nature of the thing that must be done For example the symbol at left means you must make the ground connection S 7220C i 2 Notes on safety A DANGER Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet before opening the cover of the control box Touching areas where high voltages are present can result in severe injury A WARNING Do not allow any liquids to get onto this sewing machine otherwise fire electric shocks or operating problems may NY occur If any liquid gets inside the sewing machine machine head or control box immediately turn off the power and disconnect the power plug from the electrical outlet and then contact the place of purchase or a qualified technician A CAUTION Environmental requirements Use the sewing machi
60. tic sewing function operation will be carried out automatically from continuous backtack sewing through to thread trimming just by depressing the AUTO treadle once without needing to keep it depressed continuously S 7220C 16 3 USING THE OPERATION PANEL BASIC OPERATIONS a eee enna en een enn CE 3 4 Sewing fixed stitches Setting the number of fixed stitches 4178M oh ON Example E 120 From 1 to 1999 stitches can be set After the set number of stitches in E fixed stitches have been sewn the sewing machine stops in the needle position that has been set by the needle up down key refer to p 21 After Seu o gt this normal sewing is carried out if the treadle is depressed After the thread is trimmed fixed stitch sewing mode is enabled N 2159M OO e 2160M lt Automatic thread trimming gt Press the thread trimming key to turn on the thread trimming function When the treadle is continuously depressed thread trimming is carried out after the fixed stitches have been sewn lt Automatic sewing gt When the AUTO key is pressed to turn on the automatic sewing function the fixed stitches are sewn simply by depressing the treadle once without needing to depress it continuously O AUTO lt Start and end backtack sewing gt A The start backtack key and end backtack key can be pressed to turn on the backtack sewing a function If changing the number of end backtac
61. tween the tip of the needle and the top of the needle plate 2 Approx 4mm lt 405 gt There is a gap of approximately 4 mm between the tip of the needle and the top of the needle plate 2 Set the stitch length dial to the maximum setting Tilt back the machine head Loosen the two set screws 5 and then turn the vertical cam 3 sligtly to adjust the timing NOTE Use the standard needle and feed mechanism On timing If the timing is changed broken needles may occur 4 After adjustment is completed securely tighten the two screws 5 39 S 7220C 8 7 Adjusting arm thread guide R 8 STANDARD ADJUSTMENTS The standard position of arm thread guide R 1 is the position where the screw 2 is in the center of the adjustable Becomes greater Becomes less range for arm thread guide R 1 8 8 Adjusting the presser foot height 1 AU NO oO1 S 7220C To adjust the position loosen the screw 2 and then move arm thread guide R 1 When sewing thick material move arm thread guide R 1 to the left The thread take up amount will become greater When sewing thin material move arm thread guide R 1 to the right The thread take up amount will become less The standard height of the presser foot 1 is 6 mm when the presser foot 1 is raised by means of the lifting lever 2 Loosen the nut 3 of the adjustment screw 4 and then turn the
62. unt check sheet 1 underneath the rotary hook 2 and hold it there Then run the sewing machine at the normal sewing speed for 8 seconds Any type of paper can be used as the lubrication amount check sheet 1 5 Check the amount of oil which has spattered onto the sheet If adjustment is necessary carry out the following operations in lt Adjusting the lubrication amount gt Spattered oil NOTE If the lubrication amount does not match the correct Too much Correct Too little amount shown in the illustration at left if the amount of spattered oil is too much or none at all turn the adjusting screw 3 clockwise to fully tighten it turn it back counterclockwise by 2 1 2 turns and then carry out the following adjustment lt Adjusting the lubrication amount gt 1 Tilt back the machine head 2 Turn the adjusting screw 3 to adjust the lubrication amount If the rotary hook adjusting screw 3 is turned clockwise the lubrication amount becomes greater If the rotary hook adjusting screw 3 is turned Less oil More oil counterclockwise the lubrication amount becomes a S smaller 3 Check the lubrication amount again according to the procedure given in lt Checking the lubrication amount gt above Turn the adjusting screw 3 and check the lubrication amount repeatedly until the lubrication amount is correct 4 Check the lubrication amount again after the sewing machine has been used for approximately two hours

S-7220C ENGLISH - Brother-ISM

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