Brother S-7200C manual

S-7200C Please read this manual before making any adjustments. SINGLE NEEDLE DIRECT DRIVE STRAIGHT LOCK STITCHER WITH THREAD TRIMMER SER VICE MANUAL[...]

S-7200C This service manual is intended for S-7200C; b e sure to read the S-7200C instruction manual before this manual. Carefully read the “SAFETY INSTRUCTIONS” and the whole of t his manual to understand this product before you start maintenance. As a result of resear ch and improvements regar ding this product, some det ails of this manual m[...]

S-7200C i SAFETY INSTRUCTIONS [1] Safety indications and the ir meanings This service manual and the indications and sy mbols 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 belo[...]

S-7200C ii [2] Notes on safety DANGER Wait at least 5 minutes after turning off the power sw it ch and disconnecting the power cord from the wall outlet before opening the cover of t he control box. Touching areas where high volt ages are present can result in severe injury. CAUTION Environmental requirements Use the sewing machine in an area which[...]

S-7200C iii 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, ther e is the danger that if a needle break[...]

S-7200C iv [3] Warning labels The following warning labels appear on the sewing machine. Please follow the instructions on the labels at all times wh en using the ma chine. If the labels have been removed or are difficult to read, please contact your nearest Brother dealer. 1 2 Touching areas where high voltages are present can result in severe inj[...]

S-7200C[...]

S-7200C CONTENTS 1. MACHINE SPECIFICATIONS .............. 1 2. NOTES ON HANDLING ........................ 2 3. COMPARISON OF FUNCTIONS (G50 AND G10 OPERATION PANELS). . . 3 4. FUNCTION SETTINGS (G50 OPERATIO N PANEL) .................. 4 4-1. List of advanced functi ons ................................... 4 4-2. List of speci al functio ns when po [...]

S-7200C 9-10. Knee lifter leve r mechani sm .............................. 98 9-11. Needle bar and thread take-up mechanism ....... 99 9-12. Presser foot mechanis m .................................. 100 9-13. Feed rock s haft ................................................ 101 9-14. Feed mechanism (1) ........................................ 101 [...]

S-7200C 1. MACHINE SPECIFICATIONS 1 １ . MACHINE SPECIFICA TIONS 3 4 Quick reverse O O Thread wiper - O 0 3 5 Lubrication type Minimum lubrication Semi dry Complete dry S 3 5 Use For light-weight and difficult-to-sew materials For medium- weight materials For heavy-weight materials -33S, -43S -45S -453 -303, -403 -333, -433 -305 -405 Max. sewing s[...]

S-7200C 2. NOTES ON HANDLING 2 ２ . NOTES ON HANDLING 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 elec tronic interference from the sewing machine. ・ The sewing machine should be plugged directly into a[...]

S-7200C 3. COMPARISON OF FUNCTIONS (G50 AND G10 OPERA TION P ANELS) 3 ３ . COMP ARISON OF FUNCTIONS (G50 AND G10 OPERA TION P ANELS) G10 operation panel G50 operation panel Normal sewing (*1) ○ ○ Start backtack sewing ○ ○ End backtack sewing ○ ○ Continuous backtack sewing ○ ○ Fixed stitch sewing - ○ Name label sewing - ○ Pleat [...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 4 ４ . FUNCTION SETTINGS (G50 OPERA TION P ANEL) ４ - １ . List of advanced functions This section contains a list of advanc ed functions and the key operations which are used to call the setting mode for the functions. 1 Maximum sewing speed and start backtack sewing speed setting Refer to “4[...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 5 ４ - ２ . List of special functions when power is turned on This section contains a list of functions for the G50 operat ion panel and the key operations which are used to call the setting mode for the functions. 1 Memory switch setting mode (Advanced) Refer to “4-6. Memo ry switch se tting m[...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 6 ４ - ３ . Maximum sewing speed and start backtack sewing speed setting methods If the LOCK key icon (1) is on, release the lock before carrying out the following operations. 1 The main display (2) will change from an orange display to a green display. 2 Maximum sewing speed setting ・ The maxi[...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 7 ４ - ４ . Using the LOCK key When the power switch is turned on, the LOCK key (1) turns on. (The icon (2) is illuminated.) This causes all key op erations which hav e been set using th e prot ect settings featur e to become disabled, and you can use this feature to prevent setti ng values from [...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 8 ４ - ５ . Memory switch setting method (Standard) NOTE: ・ This cannot be set if DIP switch 1 has been set to ON, so set it to OFF. ・ If the LOCK key icon (1) is on, release the lock before carry ing out the following operations. ・ If the MAX key icon (2) is on, press the MAX ke y to retur[...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 9 Presser foot lifter oper ation and pedal operat ion settings (001-) No. Setting range Initial value Setting units Setting details 001 ON/OFF OFF - Presser foot status when treadle is re turned to neutral after thread trimming ON: Presser foot does not dro p OFF: Presser foot drops (Presser foot w[...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 10 Sewing machine mo tor settings (100-) No. Setting range Initial value Setting units Setting details 100 1-99 (needles) 2 (needles) 1 Number of slow start stitches 101 OFF/1-3 OFF 1 Pedal response switching settings i mmediately after sew ing has started OFF: No switch ing 1: Slow start only when[...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 11 Sewing program settings (400-) No. Setting range Initial value Setting units Setting details 400 2-6 2 1 Start backtack sewing pattern * If A=0, there is no A operation, and if B=0, there is no B op eration. 2: A-B 3: B-A-B 4: A-B-A-B 5: B-A-B-A-B 6: A-B-A-B-A-B 401 2-6 2 1 End backtack sewing p[...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 12 Standard device settings (500-) No. Setting range Initial value Setting units Setting details 500 OFF/1-3 1 1 Actuator switch function wh en sewing is stopped (*1) OFF: No operation 1: Correction sewing switch (*2) 2: Thread trimming switch (*3) 3: Cloth feed quick reverse switch (*4) 501 OFF/1-[...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 13 ４ - ６ . Memory switch setting method (Advanced) 1 Change to memory switch mode (While holding dow n the MAX key and the FUNC (function) key, press the power ON switch.) 2 Select a memory switch number (A) 3 Change the setting details (B) 4 The setting for the memory switch will be stored and[...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 14 Presser foot lifter an d presser foot lifter pedal settings (050-) No. Setting range Initial value Setting units Setting details 050 ON/OFF ON - Forward treadle operation interlock during thread trimming ON: Depressing treadle forward during thread trimming is disabled (After the treadle is retu[...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 15 No. Setting range Initial value Setting units Setting details 080 -7-7 0 1 Treadle back ward on (thread trimming) point (S7) 081 -5-5 0 1 Treadle back ward 1st step on (presser foot lifting) point (S6) 082 -5-5 0 1 Treadle for ward 1st step on (presser foot dropping) point (S1) 083 -5-5 0 1 Trea[...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 16 Sewing machine mo tor settings (150-) No. Setting range Initial value Setting units Setting details 150 ON/OFF ON - Slow stop control when treadle is returned to neutral ON: Slow stop control without step operation (Low speed operating time before sew ing stops is almost constant) OFF: Above con[...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 17 No. Setting range Initial value Setting units Setting details 180 150-300 (sti/min) 220 (sti/min) 10 Thread trimming speed (T RIM) (*1) 181 150-300 (sti/min) 220 (sti/min) 10 Inching speed (INCH) 182 500-2500 (sti/min) 1400 (sti/min) 100 Stop improvement speed (POS) [Do not change this setting.][...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 18 Panel operation settings (350-) No. Setting range Initial value Setting units Setting details 350 ON/OFF ON - Buzzer (electronic sound) during panel operation ON: Used OFF: Not used * The buzzer will always be ON when a warning or error is displayed. 351 0-10 (seconds) 0 (seconds) 1 Additional d[...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 19 Sewing program settings (450-) No. Setting range Initial value Setting units Setting details 450 ON/OFF OFF - Correction sewing using actuator switch after thread trimming * This is only enabled when No. 500 is set to “1”. ON: Enabled OFF: Disabled (switch operation disabled) 451 ON/OFF (*1)[...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 20 Standard device se ttings (550-) No. Setting range Initial value Setting units Setting details 550 0-1 0 (*1) 1 Automatic presser foot lifter type 0: Solenoid type (Duty during chopping can be changed using No. 565.) 1: Pneumatic type (Duty during chopping can be changed using No. 566.) 551 0-50[...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 21 Error processing se ttings (650-) No. Setting range Initial value Setting units Setting details 650 OFF/ 5-30 (seconds) OFF 1 Time until buzzer stops (seconds) OFF: Buzzer does not stop 5-30: Buzzer stops after the specified time 651 OFF/ 1-30 （ minutes ） 3 (minutes) 1 Overtime error display[...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 22 ４ - ７ . Data initialization function NOTE: When DIP switch 1 is se t to ON, set it to OFF and then carry out the following o perations. 1 Change to initialization mode (While pressing the RESET key, press the power ON switch.) 2 Select the item to be initialized Item No. Main display Details[...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 23 ４ - ８ . Error history checking method The past error history can be che cked by the following procedure. 1 Change to error history display mode (While pressing the MAX key , press the power ON switch.) 2 Changing the history number (A) 3 T urn off the po wer switch to ex it error history che[...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 24 ４ - ９ . Input checking method This is used at the following times. ・ When there is a problem with an oper ation panel key, PCB or sensor ・ When you would like to check for broken cords ・ When you would like to adjust a sensor position This lets you check if the CPU is reading si gnals [...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 25 <Input check list > The four characters on the left side of the main display on t he operation p anel show the item number/item name, and the four characters on the right side show the input status. Item No. Item name Input status Check item and checking method [ 1] [ PDL] [0.000]-[5.000] [...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 26 Item No. Item name Input status Check item and checking method [ 17] [ IN1 ] [ ON]-[ OFF] Option input 1 “ON” when the input signal is LOW, and “OFF” when it is HIGH. [ 18] [ IN2 ] [ ON]-[ OFF] Option input 2 “ON” when the input signal is LOW, and “OFF” when it is HIGH. [ 19] [ I[...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 27 <Resolver signal test> 1 Select the test number Test number T est name [ ALL] All tests (Test 1-Test 7) [TES1] Test 1 (Individual) [TES2] T est 2 (Individual) [TES3] T est 3 (Individual) [TES4] T est 4 (Individual) [TES5] T est 5 (Individual) [TES6] T est 6 (Individual) [TES7] T est 7 (Ind[...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 28 <Operation pan el key input> Key name Display Key name Display [ HUD] [ SBT] [CTUP] [ EBT] [CTDN] [ RBT] [RSET] [ FIX] [NTRM] [NAME] [A-UP] [PLET] [A-DN] [AUTO] [ATRM] [ WIP] [C-UP] [ POS] [C-DN] [CORR] [D-UP] [SLOW] [D-DN] [ENT] [SPDN] [FUNC] [SPUP] [SPED] [LOCK] 4161M-4166M, 41 68M, 4167[...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 29 ４ - １０ . Output checking method This is used at the following times. ・ When there is a problem wi th the operation panel PCB ・ When there is a problem with the drive mechanism ・ When you would like to check for broken codes. You can check whether the signal s being output by the CPU [...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 30 <Output che ck list > The four characters on the left side of the main display on the operation panel show the item number/item name, and the four characters on the right side show the output status. Item No. Item name Output status Check item and checking method [ 1] [ TRM] OFF Thread tri[...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 31 Item No. Item name Output status Check item and checking method [ 14] [BUZZ] OFF Buzzer When the treadle is depressed, the buzzer sounds for 1 second. [ 15] [ PNL] [****] Panel display When the treadle is depressed, checking of the operation panel indicators, main display, speed display and lowe[...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 32 ４ - １１ . Protection settings 1 Set the power switch to OFF, and then set D IP switch 1 to OFF. 2 Change to protect setting mode (While pressing the key and the start backtack key , press the power ON switch.) 3 Set the protection level (0 to 3) [If set to lev el 0 – 2] 4 Confirm the prot[...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 33 [If set to lev el 3] To make individual settings, select level 3. 4 Confirm the protection level 5 Select an individual setting number (1 – 6) Individual setting number Details of main operation disabled 1 MAX key 2 Memory switches (for administrator) 3 Correction key 4 Mainly keys with indica[...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 34 <Protection setti ng list> ○ : Enabled □ : Immediately after the power is turned on, the LOCK key icon will show the previ ous status. After this, the LOCK key can be used to change the enabled/disabled status. △ : Immediately after the pow er is turned on, the function is disabled ([...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 35 ４ - １２ . Software version checking method 1 Change to version display mode (While pressing the speed key (+), press the power ON switch.) 2 Select the softw are type (A) Software ty pe (A) Software V ersion (B) [1. MN] Main CPU [1.0| 00] [2. PL] Panel CPU [1.000] [3.IPL] Main IPL [1.000] 3[...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 36 ４ - １３ . Viewing maintenance information This allows you to check the informati on which is stored in the head detector unit. 1 Change to maintenance display mode (While pressing the keys, press the power ON switch.) 2 Select the item name No. Item name Item name (A) display Details (B) 1 [...]

S-7200C 4. FUNCTION SETTINGS (G50 OPERATION PANEL) 37 ４ - １４ . Adjusting the sewing machine reference position 1 Change to sewing machine reference position adjustment mode 2 Select the adjustment item * “1 Sewing machine reference position” is adjust ed at the time of shipm ent from the factory . * If you would like to change only the st[...]

S-7200C 5. FUNCTION SETTINGS (G10 OPERATION PANEL) 38 ５ . FUNCTION SETTINGS (G10 OPERA TION P ANEL) ５ - １ . List of special functions when power is turned on This section contains a list of functions for the G10 operat ion panel and the key operations which are used to call the setting mode for the functions. 1 Memory switch setting mode (Sta[...]

S-7200C 5. FUNCTION SETTINGS (G10 OPERATION PANEL) 39 ５ - ２ . Function setting method 1 Change to function setting mode (While pressing the end backtack ke y , press the power ON switch.) 2 Select the setting item (Refer to <Setting i tem list> (P.40)) 3 Change to the setting value display 4 Change the setting value. 5 Confirm the setting[...]

S-7200C 5. FUNCTION SETTINGS (G10 OPERATION PANEL) 40 <Setting item list> Display Setting item Setting item display Setting value display Setting value or operation when setting Default value [ UP] Needle up stop Needle up/down stop [UPDN] [ DN] Needle do wn stop [ DN] [ ON] Correction sewing Correction sewing [CORR] [ OFF] No correction sew [...]

S-7200C 5. FUNCTION SETTINGS (G10 OPERATION PANEL) 41 ５ - ３ . Data initialization function NOTE: When DIP switch 1 is se t to ON, set it to OFF and then carry out the following opera tions. 1 Change to initialization mode (While pressing the continuous backta ck key, press the power ON sw itch.) * The only initialization item is clear all. Disp[...]

S-7200C 5. FUNCTION SETTINGS (G10 OPERATION PANEL) 42 ５ - ４ . Error histor y checking method The past error history can be che cked by the following procedure. 1 Change to error history display mode (While pressing the MAX key , press the power ON switch.) 2 Change the error history number 3 Check the history details 4 [If checking the details [...]

S-7200C 5. FUNCTION SETTINGS (G10 OPERATION PANEL) 43 ５ - ５ . Input checking method This is used at the following times. ・ When there is a problem with an oper ation panel key, PCB or sensor ・ When you would like to check for broken cords ・ When you would like to adjust a sensor position This lets you check if the CPU is reading si gnals [...]

S-7200C 5. FUNCTION SETTINGS (G10 OPERATION PANEL) 44 <Input check list > The display on the operation panel shows the item number/item name, or the input status. Item No. Item name Input status Checking item and checking method [ 1] [ PDL] [0.000]-[5.000] [V] Treadle pedal voltage Depress the treadle forward/backward. [ 2] [ ENC] [ 0]-[ 359][...]

S-7200C 5. FUNCTION SETTINGS (G10 OPERATION PANEL) 45 Item No. Item name Input status Checking item and checking method [ 17] [ IN1] [ ON] ～ [ OFF] Option input 1 “ON” when the input signal is LOW, and “OFF” when it is HIGH. [ 18] [ IN2] [ ON] ～ [ OFF] Option input 2 “ON” when the input signal is LOW, and “OFF” when it is HIGH. [...]

S-7200C 5. FUNCTION SETTINGS (G10 OPERATION PANEL) 46 <Resolver signal test> 1 Change to test number display 2 Select the test number Number T est number T est name 1 [ ALL] All tests (Test 1-Test 7) 2 [TES1] Test 1 (Individual) 3 [TES2] Test 2 (Individual) 4 [TES3] Test 3 (Individual) 5 [TES4] Test 4 (Individual) 6 [TES5] Test 5 (Individual)[...]

S-7200C 5. FUNCTION SETTINGS (G10 OPERATION PANEL) 47 <Operation pan el key input> Key name Display Key name Display [A-UP] [D-UP] [A-DN] [D-DN] [B-UP] [ WIP] [B-DN] [C-UP] [ EBT] [C-DN] [ RBT] [SPED] 2024B, 2025B, 41 74M, 4161M-4163M, 2096B 2045B 2024B-2025B (A) (A) (B) (B) (C) (C) (D) (D)[...]

S-7200C 5. FUNCTION SETTINGS (G10 OPERATION PANEL) 48 ５ - ６ . Output checking method This is used at the following times. ・ When there is a problem wi th the operation panel PCB ・ When there is a problem with the drive mechanism ・ When you would like to check for broken cords You can check whether the signal s being output by the CPU are [...]

S-7200C 5. FUNCTION SETTINGS (G10 OPERATION PANEL) 49 <Output che ck list > The display on the operation panel shows the it em number/item name, or the output status. Item No. Item name Output status Checking item and checking method [ 1] [ TRM] OFF Thread trimming solenoid When the treadle is depressed, the solenoid operates for 2 seconds. W[...]

S-7200C 5. FUNCTION SETTINGS (G10 OPERATION PANEL) 50 Item No. Item name O utput status Checking item and checking method [ 14] [BUZZ] OFF Buzzer When the treadle is depressed, the buzzer sounds for 1 second. [ 15] [ PNL] [****] Panel display When the treadle is depressed, c hecking of the operation panel indicators and display will start. When the[...]

S-7200C 5. FUNCTION SETTINGS (G10 OPERATION PANEL) 51 ５ - ７ . Protection settings 1 Set the power switch to OFF, and then set DI P switch 1 to OFF. 2 Change to protect setting mode (While pressing the key and the start backtack key , press the power ON switch.) 3 Set the protection level (0 to 3) [If set to lev el 0 – 2] 4 Confirm the protect[...]

S-7200C 5. FUNCTION SETTINGS (G10 OPERATION PANEL) 52 [If set to lev el 3] To make individual settings, select level 3. 4 Confirm the protection level 5 Select an individual setting number (1-6) Individual setting number Details of main operation disabled 1 MAX key 2 Function setting 3 None (setting disabled) 4 Mainly keys with indicators 5 S titch[...]

S-7200C 5. FUNCTION SETTINGS (G10 OPERATION PANEL) 53 <Protection setti ng list> ○ : Enabled × : Disabled 3 (Individual setting) Level Setting function 0 1 2 All OFF 1 =ON 2 =ON 3 =ON 4 =ON 5 =ON 6 =ON Sewing speed ([MAX] setting) ○ ( × ) ○ ( × ) × ( × ) ○ ( × ) × ( × ) ( × ) ( × ) ( × ) ( × ) ( × ) Function setting ○ ([...]

S-7200C 5. FUNCTION SETTINGS (G10 OPERATION PANEL) 54 ５ - ８ . Software version checking method 1 Change to version display mode (While pressing the start backta ck key, press the power ON switch.) 2 Check the versions of each softw are If you press the buttons as sho wn in the table, you can check the various sof tware versions. Indicator Softw[...]

S-7200C 5. FUNCTION SETTINGS (G10 OPERATION PANEL) 55 ５ - ９ . Viewing maintenance information This allows you to check the informati on which is stored in the head detector unit. 1 Change to maintenance display mode (While pressing the and keys, press the power ON switch.) 2 Select the maintenance item No. Item name Item name display 1 Grease u[...]

S-7200C 5. FUNCTION SETTINGS (G10 OPERATION PANEL) 56 ５ - １０ . Adjusting the sewing machine reference position 1 Change to sewing machine reference position adjustment mode 2 Select the adjustment item * “1 Sewing machine reference position” is adjusted at the time of shipment from the factory . * If you would like to change only the stop[...]

6. SETTING THE DIP SWITCHES (G 50 AND G10 OPERATION P ANELS) S-7200C 57 ６ . SETTING THE DIP SWITCHES (G50 AND G10 OPERA TION P ANELS) DANGER Wait at least 5 minutes after turning off the powe r sw itch and disconnecting the power cord from the wall outlet before opening the face plate of the control box. Touching areas where high voltages are pre[...]

7. MECHANICAL DESCRIPTIONS S-7200C 58 ７ . MECHANICAL DESCRIPTIONS The mechanisms operate in the order of the numbers given in the illustrations. * <number> and [number] indicates the flo w of each operations given. * (number) indicates part names only. (T hey do not represent the flow of operations.) ７ - １ . Upper shaft and needle bar m[...]

7. MECHANICAL DESCRIPTIONS S-7200C 59 ７ - ２ . Lower shaft and rotary hook mechanism 1. Pulley 2. Motor shaft 3. Joint assembly 4. Timing pulley U 5. Timing belt 6. Timing pulley D 7. Lower shaft 8. Lo wer shaft gear 9. Rotar y hook shaft gear 10. Rotary hook shaft 11. Rotary hook assembly 4339M[...]

7. MECHANICAL DESCRIPTIONS S-7200C 60 ７ - ３ . Feed mechanism 1. Pulley 2. Upper shaft 3. Lower shaft (Feed dog up/down movement ) (Feed dog forward/back move ment) <4> Feed lifting eccentric wheel ass embly 4. Level fee d eccentric wheel assembly <5> Feed lifting feed shaft assembly 5. Level feed c onnecting rod <6> Feed bar 6[...]

7. MECHANICAL DESCRIPTIONS S-7200C 61 ７ - ４ . Quick reverse mechanism (quick back mechanism) 1. Actuator < 1> Reverse lever 2. Quick reverse solenoid <2> Reverse sewing shaft 3. Solenoid lever <3> Handle shaft arm assembl y <4> Feed regulator connecting rod 4. Eccentric pin 5. Feed regulator shaft arm 6. Feed regulator s[...]

7. MECHANICAL DESCRIPTIONS S-7200C 62 ７ - ５ . Lubrication mechanism (thread take-up and rotary hook) This sewing machine’s lubrication mec hanism is a dry head type using ta nk lubrication. The oil level c an be checked in the oil gauge window without needin g to tilt back the machine head or operate the se wing machine. Thread take-up minimu[...]

7. MECHANICAL DESCRIPTIONS S-7200C 63 ７ - ６ . Thread trimming mechanism ７ - ６ - １ . Thread trimming mechanism operation sequence The illustration belo w shows the mechanism with the high-s peed rotary hook removed. 1 ） When thread rimming sig nal is input 2 ） Rocking of movable knife ho lder 1. Solenoid plunger 2. Solenoid lever 3. Th[...]

7. MECHANICAL DESCRIPTIONS S-7200C 64 3 ） Thread trimming complete an d operation stopped 1. Extension spring <1> Thread tr immer lever [1] T hread trimmer lever 2. Thread trimmer cam lever <2> T hread trimmer connecting rod [2] Forked shaft 3. Solenoid lever <3> T hread trimmer holder [3] Slide block 4. Solenoid plunger <4&g[...]

7. MECHANICAL DESCRIPTIONS S-7200C 65 ７ - ６ - ２ . Upper and lower thread trimming sequence 1. The needle rises 1.8 mm fr om its lowest position and the rotary hook tip catches the loop made by the needle. (For heavy-weight materials, it rises 2.2 mm.) 2. The thread trimming signal turns on and the t hread trimming cam moves the movable knife.[...]

7. MECHANICAL DESCRIPTIONS S-7200C 66 ７ - ７ . Tension release mechanism (Presser foot is raised using the knee lifter plate (1)) (Presser foot is raised using the lifting lev er) (Thread trimming signal is input) 1. Knee lifter <1> Presser bar lifter lever [1] Thread trimmer solenoid 2. Knee lifter connecting rod [2] Solenoid lever 3. Kne[...]

7. MECHANICAL DESCRIPTIONS S-7200C 67 ７ - ８ . Thread wiper mechanism (option device) (Thread wiper signal is input) 1. Thread wiper solenoid 2. Thread wiper rod 3. T hread wiper crank assembly 4. Thread wiper (Thread wiper signal is turned off) <1> Thread wiper spring <2> Thread wiper solenoid (R eturns) 4350M[...]

8. DISASSEMBL Y S-7200C 68 ８ . DISASSEMBL Y DANGER Wait at least 5 minutes after turning off the po wer sw itch and disconnecting the po wer cord from the wall outlet before opening the cover of t he control bo x. Touching areas where high v olt ages are pre sent can result in sever e injury. CAUTION Disassembly should onl y be carried out by a q[...]

8. DISASSEMBL Y S-7200C 69 ８ - ２ . Cable tie 1. Cable tie (Cut) 2. Cable tie (Cut) 3. Cable tie (Cut) 4. Cable tie (Cut) ８ - ３ . Connector 1. Head detector unit connector 2. Operatio n panel connector 3. Resolver connector 4. Connector 5. Motor connector 6. Pins (1) Connector 4374M 4375M When pulling out the pin from the conn ector, use a p[...]

8. DISASSEMBL Y S-7200C 70 ８ - ４ . Operation panel and head detector unit 1. Screw [2 pcs] 2. Operation panel 3. Screw [6 pcs] 4. Side plate 5. Scre w [3 pcs] (Loosen) 6. Screw [2 pcs] 7. Head detector unit 8. Cord [2 pcs] 4376M[...]

8. DISASSEMBL Y S-7200C 71 ８ - ５ . Covers and bobbin winder unit 4377M 1. Screw [3 pcs] 2. Face plate assembly 3. Screw [5 pcs] 4. Motor cover 5. Screw 6. Cord holder 7. Bobbin winder fixed scre w [3 pcs] 8. Bobbin w inder unit[...]

8. DISASSEMBL Y S-7200C 72 ８ - ６ . Tension release wire and thread trimmer solenoid 1. Screw 2. Tension rele ase w ire 3. Screw 4. Wire holder D 5. Screw 6. Cord holder plate 7. Screw [3 pcs] 8. Thread trimmer solenoid 9. Tension releas e wire (Remov e from tension release plate) 10. Screw 11. W ire holder U 12. T ension release wire (Pull out)[...]

8. DISASSEMBL Y S-7200C 73 ８ - ７ . Wick holder and oil tube (-[]0[] specifications) 1. Wick (Unite the knot) 2. Screw 3. Wick holder 4. Screw 5. Cord holder 6. Vinyl tube (Remove from wire code holder) 7. Vinyl tube (Pull out) 4379M[...]

8. DISASSEMBL Y S-7200C 74 ８ - ８ . Oil tank, bed bottom cover and sub tank -[]0[], []3[] specifications only 1. Screw 2. Screw 3. Sub tank assembly (Pull out) 4. Vinyl tube (Pull out) 5. Vinyl tube (Pull out) 6. Screw [2 pcs] 7. Oil tank 8. Screw [9 pcs] 9. Bed bottom cover (1) Lubricatin g oil 4380M -[]0[] 、 []3[] specifications only 1) Hold[...]

8. DISASSEMBL Y S-7200C 75 ８ - ９ . Stand 1. Stand L [2 pcs] 2. Stand R [2 pcs] ８ - １０ . Safety switch and quick reverse solenoid 1. Screw 2. Tube holder 3. Vinyl tube (Pull out) 4. Screw 5. Washer 6. Safety switch 7. Screw [2 pcs] 8. Quick reverse solenoid 4381M 4382M[...]

8. DISASSEMBL Y S-7200C 76 ８ - １１ . Needle, presser foot and R-actuator 1. Set screw 2. Needle 3. Screw 4. Finger guard ８ - １２ . Thread tension mechanism 1. Pre-tension assembl y 2. Thread guid e 3. Screw 4. Arm thread guide R 5. Set screw 6. Thread tension bracket assembl y 7. Tension releas e pin 4384M 4383M Integrated finger gua rd t[...]

8. DISASSEMBL Y S-7200C 77 ８ - １３ . Needle plate, feed dog, etc. 1. Flat screw [2 pcs] 2. Needle plate 3. Slide plate 4. Screw [2 pcs] 5. Feed dog 6. Screw 7. Ruler plate 4385M[...]

8. DISASSEMBL Y S-7200C 78 ８ - １４ . Bobbin case, rotary hook a nd thread trimmer mechanism 1. Screw 2. Hook stopper 3. Bobbin case 4. Set screw [3 pcs] 5. Rotary hook 6. Flat screw [3 pcs] 7. Knife holder presser plate 8. Thread trimmer lever spring (Remove from hole) 9. Screw (Loosen) 10. T hread trimmer lever assembly 4386M 11. T hread trim[...]

8. DISASSEMBL Y S-7200C 79 ８ - １５ . Feed bar mechanism 1. Set screw (Loosen) 2. Feed lifting rock bar shaft 3. Screw [2 pcs] (Loosen) 4. Feed bar assembly (Open) 5. Set screw [2 pcs] (Loosen) 6. Feed lifting eccentric wheel assembly ８ - １６ . Feed rock shaft 1. Rubber cap 2. Screw (Loosen) 3. Feed rock arm (Open) 4. Set screw [2 pcs] (Lo[...]

8. DISASSEMBL Y S-7200C 80 ８ - １７ . Presser foot mechanism 1. Presser adjusting screw 2. Spring guide 3. Presser bar spring 4. Washer 5. Screw 6. Thread guide presser bar br acket 7. Screw 8. Presser bar guide bracket 9. Presser bar (Pull upward) 10. Retaining ring E 11. Presser bar lift er lever spring 12. Set scre w 13. Presser bar lift er [...]

8. DISASSEMBL Y S-7200C 81 ８ - １８ . Knee lifter lever mechanism 1. Shoulder screw 2. Knee lifter bar (Pull out) 3. Shoulder screw 4. Presser bar lifter lever assembly (R emove in the direction o f the allow) 5. Shoulder screw 6. Knee lifter lever ８ - １９ . Tension pulley 1. Bolt [2 pcs] 2. Tension pul ley unit 4390M 4391M[...]

8. DISASSEMBL Y S-7200C 82 ８ - ２０ . Needle bar and thread take-up mechanism 1. Rubber cap 2. Rubber cap [2 pcs] 3. Rubber cap 4. Rubber cap [2 pcs] 5. Rubber cap 6. Screw (Loosen) 7. Needle bar 8. Needle bar clamp 9. Needle bar guide slide bl ock 10. Set scre w (Loosen) 11. Need le bar bush U 12. Set scre w [3 pcs] (Loosen) 13. Need le bar cr[...]

8. DISASSEMBL Y S-7200C 83 ８ - ２１ . Pulley and motor 1. Screw [3 pcs] 2. Pulley washer [3 pcs] 3. Pulley 4. Screw [3 pcs] 5. Screw 6. Ground w ire 7. Set screw [Two at motor side] (Loosen) 8. Motor (Pull out) (1) Screw (2) Motor (a) Scre w hole 4393M If the motor will not pul l out … 1) Insert the two screws (1) which were removed from the [...]

8. DISASSEMBL Y S-7200C 84 ８ - ２２ . Timing belt 1. Timing belt (Remove from timing pulle y D) 2. Screw [3 pcs] 3. Fan 4. Flange 5. Timing belt (Remove from arm) ８ - ２３ . Feed mechanism (1) 1. Spring assembl y 2. Retaining ring C 3. Washer 4. Pin 5. Quick reverse sole noid plunger 4394M 4403M[...]

8. DISASSEMBL Y S-7200C 85 ８ - ２４ . Feed mechanism (2) 4395M 1. Set screw (Loosen) 2. Eccentric pin 3. Set screw (Loosen) 4. Set screw (Loosen) 5. Solenoid lever assembly 6. Dial lock lever (Raise) 7. Stitch length dial (Turn to the left and remove ) 8. Positioning pin 9. Notch spring 10. Set scre w [2 pcs] (Loosen) 11. Feed regulator shaft 1[...]

8. DISASSEMBL Y S-7200C 86 ８ - ２５ . Feed mechanism (3) 1. Set screw [2 pcs] (Loosen) 2. Set screw [2 pcs] (Loosen) 3. Feed regulator shaft (Pull out) 4. Spring hook arm assembly 5. Rubber cap 4396M 6. Rubber cap 7. Set screw [3 pcs] (Loosen) 8. Feed regulator support shaft 9. Feed regulator shaft L 10. F eed regulator assembly (Only the top c[...]

8. DISASSEMBL Y S-7200C 87 ８ - ２６ . Lower shaft, lower shaft gear and feed regulator unit 1. Set screw [2pcs] (Loosen) 2. Set screw [2pcs] (Loosen) 3. Set screw [2pcs] (Loosen) 4. Lower shaft assembly 5. Feed regulator assembly 6. Lower shaft gear 4397M[...]

8. DISASSEMBL Y S-7200C 88 ８ - ２７ . Plunger, rotary hook shaft, rotary hook shaft gear and thread trimmer cam 1. Rubber cap 2. Cap screw pump 3. Spring 4. Plunger 5. Set screw [2 pcs] (Loosen) ８ - ２８ . Reverse lever 1. Socket bolt (Loosen) 2. Screw [2pcs] 4398M 4399M 6. Set screw [2pcs] (Loosen) 7. Set screw [2pcs] 8. Spacer [2pcs] 9. R[...]

9. ASSEMBL Y S-7200C 89 ９ . ASSEMBL Y DANGER Wait at least 5 minutes after turning off the po wer sw itch and disconnecting the po wer cord from the wall outlet before opening the cover of t he control bo x. Touching areas where high v olt ages are pre sent can result in sever e injury. CAUTION Assembly should only be ca rried out by a qualified [...]

9. ASSEMBL Y S-7200C 90 Assemble each part in the order sho wn in the illustration. ■ Apply grease to the plac es marked with white arro ws in the illustrations. Use the “Grease kit (SA8837-001)” spec ified by Brother for the grease. ９ - １ . Stitch length dial and feed regulator mechanism 4087M With the positioning pin (a) set into the gr[...]

9. ASSEMBL Y S-7200C 91 ９ - ２ . Reverse lever 1. Handle shaft support 2. Reverse lever assembly 3. Screw [2 pcs] 4. Socket bolt (Tighten) 5. Spring (Attach to pin (a)) 4406M[...]

9. ASSEMBL Y S-7200C 92 ９ - ３ . Plunger, rotary hook shaft, rota ry hook shaft gear and thread trimmer cam 1. Rotary hook shaft (Insert) 2. Thread trimmer cam 3. Rotary hook shaft gear 4. Set screw (Align with screw stop) 5. Set screw (Tighten) 6. Set screw (Align with screw stop) 7. Set screw (Tighten) 8. Rotary hook shaft (Check that it rotat[...]

9. ASSEMBL Y S-7200C 93 ９ - ４ . Lower shaft, lower shaft gear and feed regulator unit 1. Lower shaft assembly 2. Feed regulator assembly 3. Lower shaft gear 4. Set screw (Align with screw stop) 5. Set screw (Tighten) 6. Set screw (Align with screw stop) 7. Set screw (Tighten) 8. Timing pulle y D 9. Set screw (Align with screw stop) 10. Set scre[...]

9. ASSEMBL Y S-7200C 94 ９ - ５ . Feed mechanism (1) 1. Feed regulator assembly 2. Feed regulator shaft L 3. Feed regulator support shaft 4. Set screw (Sharp tip .. align with hole in feed regulator shaft L and tig hten) 5. Set screw (Tighten) 6. Set screw (Tighten) 7. Rubber cap 8. Rubber cap 9. Set screw (Align with screw stop) 10. Set screw (T[...]

9. ASSEMBL Y S-7200C 95 ９ - ６ . Feed mechanism (2) 1. Feed regulator shaft (Insert) 2. Spring hook arm assembly 3. Set screw (Align with screw stop) 4. Set screw (Tighten) 5. Set screw (Align with screw stop) 6. Set screw (Tighten) 4410M Lastly, check that the feed regulator assem bly (a) moves smoothly.[...]

9. ASSEMBL Y S-7200C 96 ９ - ７ . Upper shaft mechanism 1. Upper shaft assembly (Insert) 2. Set screw [One at upper shaft side] (Align with screw stop) 3. Set screw [One at upper shaft side] (Tighten ) 4414M[...]

9. ASSEMBL Y S-7200C 97 ９ - ８ . Timing belt 1. Timing belt 2. Flange 3. Fan 4. Screw [3 pcs] ９ - ９ . Pulley, motor and ground wire 1. Motor (Insert) 2. Screw [3 pcs] 3. Pulley 4. Pulley washer [3 pcs] 5. Screw [3 pcs] 441 1M 6. Ground w ire 7. Screw 8. Set screw [One at motor side] (Align with screw stop) 9. Set screw [One at motor side] (T[...]

9. ASSEMBL Y S-7200C 98 ９ - １０ . Knee lifter lever mechanism 1. Knee lifter lever 2. Shoulder screw 3. Presser bar lifter lever assembly (Insert) 4. Shoulder screw 5. Knee lifter bar (Insert) 6. Shoulder screw 4413M[...]

9. ASSEMBL Y S-7200C 99 ９ - １１ . Needle bar and thread take-up mechanism 1. Washer 2. Thread take-up lever assembl y 3. Needle bar crank 4. Set screw (Align with screw stop) 5. Set screw [2 pcs] (Tighten) 6. Needle bar bush U 7. Set screw (Tighten) 8. Needle bar guide slide bl ock 9. Needle bar clamp 10. Needle bar 4415M Turn the machine pull[...]

9. ASSEMBL Y S-7200C 100 ９ - １２ . Presser foot mechanism 1. Presser bar lifter lever shaft (Insert) 2. Tension releas e plate 3. Washer 4. Presser bar lifter lever assembly 5. Retaining ring E 6. Presser bar lifter lever spring 7. Retaining ring E 8. Set screw 9. Presser bar (Insert) 10. Presser bar guide bracket 4416M 11. Scre w (Provisional[...]

9. ASSEMBL Y S-7200C 101 ９ - １３ . Feed rock shaft 1. Feed rock shaft (Insert) 2. Washer 3. Set screw co llar 4. Feed rock arm ９ - １４ . Feed mechanism (1) 1. Solenoid lever assembly 2. Eccentric pin 3. Retaining ring C 4417M 4418M 5. Set screw (Align with screw stop) 6. Set screw (Tighten) 7. Screw (Tighten) 4. Set screw (Tighten) 5. Set[...]

9. ASSEMBL Y S-7200C 102 ９ - １５ . Feed mechanism (2) 1. Quick reverse sole noid plunger 2. Pin 3. Washer ９ - １６ . Feed bar mechanism 1. Feed dog 2. Feed bar 3. Screw (Tighten) 4. Feed lifting eccentric wheel assembly 5. Set screw [2 pcs] (Tighten) 4419M 4420M 6. Feed bar assembly 7. Screw [2 pcs] (Tighten) 8. Feed lifting rock bar shaft[...]

9. ASSEMBL Y S-7200C 103 ９ - １７ . Tube holder, safety switch and quick reverse solenoid 1. Quick reverse solenoid 2. Screw [2 pcs] 3. Tube holder 4. Screw 5. Safety switch 6. Washer 7. Screw 4421M ■ Refer to “10-6. Quick reverse device” when carrying out assembly.[...]

9. ASSEMBL Y S-7200C 104 ９ - １８ . Thread trimmer mechanism 1. Forked shaft (Insert) 2. Thread trimmer cam lever shaft (Insert) 3. Rubber cushio n 4. Collar 5. Extension spri ng 6. Thread trimmer lever assembly 7. Retaining ring E 8. Washer 9. Cushion 10. Set screw (Tighten) 4422M 11. T hread trimmer lever spring 12. T hread trimmer lever asse[...]

9. ASSEMBL Y S-7200C 105 ９ - １９ . Oil tank, bed bottom cover and sub tank 1. Bed bottom cover 2. Screw [9 pcs] 3. Screw 4. Oil tank 5. Screw [2 pcs] 6. Vinyl tube (Insert) 7. Sub tank assembly (Insert) 8. Screw 9. Vinyl tube (Insert) 10. Rubber cap 4423M ■ Refer to “3-3. Lubrication (-[]0[], []3[] specifications)” in the Instruction Man[...]

9. ASSEMBL Y S-7200C 106 ９ - ２０ . Needle, presser foot and R-actuator 1. Presser foot 2. Finger guard 3. Washer 4. Screw 5. Needle 6. Set screw 7. Screw 8. Presser bar bracket thread guide 9. Screw 10. R-actuator Integrated finger guard type 4425M ■ Adjusting the pre sser foot height The standard lifting amount is 6 mm when the presser foot[...]

9. ASSEMBL Y S-7200C 107 ９ - ２１ . Thread tension mechanism 1. Thread guid e 2. Pre-tension assembl y 3. Arm thread guide R 4. Screw 5. Tension releas e stud 6. Tension releas e pin 7. Thread tension bracket assembl y 8. Set screw 9. Needle bar thread guide 10. Screw 4424M ■ Refer to “10-4. Adjusting arm thread guide R” when carrying out[...]

9. ASSEMBL Y S-7200C 108 ９ - ２２ . Tension release wire and thread trimmer solenoid 1. Tension releas e wire (Inser t into tension release plate) 2. Wire holder U 3. Screw 4. Tension releas e wire (Insert) 5. Thread trimmer solenoid 6. Screw [3 pcs] 7. Wire holder D 8. Screw 9. Tension rele ase w ire 10. Screw 11. Cord holder plate 12. Screw 1[...]

9. ASSEMBL Y S-7200C 109 ９ - ２３ . Wick holder and oil tube (-[]0[] specifications) 1. Vinyl tube (Insert) 2. Vinyl tube (Insert into wire cord holder) 3. Cord holder 4. Screw ９ - ２４ . Tension pulley 1. Tension pul ley unit 2. Bolt [2 pcs] 4427M 4432M 5. Wick holder 6. Screw 7. Wick (Clamp)[...]

9. ASSEMBL Y S-7200C 110 ９ - ２５ . Rotary hook 1. Rotary hook 2. Set screw [3 pcs] (Tighten) 3. Bobbin case 4. Hook stopper 5. Screw (Tighten) 4439M ■ Refer to “10-12. Adjusting the needle and rotar y hook timing” when carrying o ut assembly.[...]

9. ASSEMBL Y S-7200C 111 ９ - ２６ . Stand 1. Stand L [2 pcs] 2. Stand R [2 pcs] ９ - ２７ . Needle plate, feed dog, etc. 1. Needle plate 2. Flat screw [2 pcs] 3. Slide plate 4. Ruler plate 5. Screw 4381M 4433M[...]

9. ASSEMBL Y S-7200C 112 ９ - ２８ . Covers and operation panel (1) 4434M 1. Face plate assembly 2. Screw [3 pcs] 3. Cord holder 4. Screw 5. Motor cover 6. Screw [5 pcs] 7. Bobbin w inder unit 8. Bobbin winder fixed scre w [3 pcs][...]

9. ASSEMBL Y S-7200C 113 ９ - ２９ . Covers and operation panel (2) 1. Head detector unit 2. Screw [2 pcs] 3. Cord [2 pcs] 4. Screw [3 pcs] (Tighten) ９ - ３０ . Cable tie 1. Cable tie 2. Cable tie 4435M 5. Side plate 6. Screw [6 pcs] 7. Operation pan el 8. Screw [2 pcs] 3. Cable tie 4. Cable tie 4436M[...]

9. ASSEMBL Y S-7200C 114 ９ - ３１ . Connector 1. Head detector unit connector 2. Operation panel connector 3. Resolver connector 4. Connector 5. Motor connector 6. Pins ９ - ３２ . Knee lifter lever 14P Cord 14P Cord 1 (Ground) 8 － 2 － 9 － 3 T hread trimmer solenoid 10 Thread trimmer solen oid 4 Thread wiper 11 Thread wiper 5 Quick rev[...]

S-7200C 10. ADJUSTMENTS 115 １０ . ADJUSTMENTS CAUTION Maintenance and inspection of the sew ing 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-in[...]

S-7200C 10. ADJUSTMENTS 116 Sewing machine Table １０ - ２ . Adjusting the safety switch position The safety switch (1) is normally installed as shown in figure [A]. However, if the processing me thod 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 ([...]

S-7200C 10. ADJUSTMENTS 117 １０ - ３ . Adjusting the thread take-up spring <Thread take-up spring positio n> The standard position of the thr ead take-up spring (1) is 6-8 mm [4-6 mm for -[][]5 specific ations] above the surface of the thread guide (3) when the presser foot (2) is lowered. 1. Lo wer the presser foot (2). 2. Loosen the set[...]

S-7200C 10. ADJUSTMENTS 118 １０ - ４ . Adjusting arm thread guide R The standard position of arm thread guide R (1) is the position where the screw (2) i s in the center of the adjustable range for arm thread guide R (1). * To adjust the position, loosen the screw (2) and then move arm thread guide R (1). ・ When se wing thick material, move a[...]

S-7200C 10. ADJUSTMENTS 119 １０ - ６ . Quick reverse device 1. Turn the stitch length dial to the maximum setting. 2. Remove the side plate. 3. Tilt back the machine head. 4. Turn the stitch length dial to the maximum setting. 5. Loosen the two screws (1). 6. W ith the reverse lever (3) lowered as far as it w ill go, push quick reverse solenoid[...]

S-7200C 10. ADJUSTMENTS 120 １０ - ８ . Adjusting the feed dog height The standard height of the feed dog (1) when it is at its maximum height above the top of the needle plate is 0.8 mm for -[][]S / [][]3 s pecifications, and 1.2 mm for -[][]5 speci fica- tions. 1. Turn the pulley until the f eed dog (1) rises to the highest position. 2. T ilt [...]

S-7200C 10. ADJUSTMENTS 121 １０ - ９ . Adjusting the feed dog angle The standard angle for the feed dog (1) w hen it is at its highest position above the ne edle plate is when the “ ” mark (or V groove) on the shaft (2) is aligned w ith the feed rocker bracket arm (3). 1. Turn the machine pulley to move the feed dog (1) to its highest posit[...]

S-7200C 10. ADJUSTMENTS 122 １０ - １０ . Adjusting the needle bar height Reference line (a), which is the second line from the bottom of the needle bar (1) (fourth line from the bottom w hen using a DA x 1 needle) should be aligned with the lower edge of the needle bar bush D (2) as shown in the illustration when the needle bar (1) is at its l[...]

S-7200C 10. ADJUSTMENTS 123 １０ - １２ . Adjusting the needle and rotary hook timing The tip of the rotary hook (3) should be aligned with the center of the needle (4) when the needle bar (1) moves up from its lowest position to th e position w here reference line (b), which is the line at the bottom of the needle bar (1) (third line from the [...]

S-7200C 10. ADJUSTMENTS 124 １０ - １３ . Adjusting the thread trimming timing Remove the presser foot, needle plate and feed dog. < Thread trimming cam position adjustment > 1. Turn the machine pulley to raise the needle bar 5 mm from its lowest position (reference line (a) position) so that reference line (b) is aligned with the bottom [...]

S-7200C 10. ADJUSTMENTS 125 １０ - １４ . Adjusting the thread take-up amount (-[] []3 specifications) CAUTION Turn off the power switch before carrying out this operation. The machine may operate if the treadle is depress ed by mistake, which could result in injury. NOTE: Do not use this function with models that are not –[][]3 spe cificatio[...]

S-7200C 10. ADJUSTMENTS 126 １０ - １５ . Adjusting the needle up stop position <G50 operati on panel> 1 (While pressing the key (1), press the power ON sw itch.) “MorG xxx” will appear in orange in the main display (2). (xxx is the value at the time of shipment from the factory , and varies depending on the sewing machine.) 2 Selecti[...]

S-7200C 10. ADJUSTMENTS 127 <G10 operati on panel > 1 (While pressing the key (1), press the power ON sw itch.) “MorG” will appear in the display (2). 2 Selecting “UPoS” (Press once) 3 Needle up stop position setting ・ If you press the key, the setting value will increase and the needle up stop position will become lower. ・ If you[...]

S-7200C 10. ADJUSTMENTS 128 １０ - １６ . Adjusting the treadle <Forward depression sensiti vity adjustment> If the machine starts running at low speed when your foot is simply resting on the treadle, or if the treadle pressure is felt to be too weak, adjust the position (a to c) at w hich the treadle spring (1) is hooked onto the treadle[...]

S-7200C 10. ADJUSTMENTS 129 １０ - １８ . Adjusting the tension release wire If the tension discs remain open or if the upper thread pulls out from the needle hole after thread trimmi ng, carry out the following adjustment. * Lower the presser foot befor e carrying out the adjustment. A. If the upper thread pulls out of the needle hol e (The te[...]

S-7200C 10. ADJUSTMENTS 130 １０ - １９ . Adjusting the rotary hook lubrication amount (-[]0[], []3[] sp ecifications) CAUTION Be careful not to touch y our fingers or the lubrication amount check sheet against moving parts such as the ro tary hook or the feed mechanism when checki ng the amount of oil supplied to t he rotary hook, otherwise in[...]

S-7200C 11. REPLACING PARTS 131 １１ . REPLACING P ARTS CAUTION Replacement of parts shoul d only be carried out by a qualified technician. Use only the proper replacem ent parts as specified by Brother. Turn off the power switch and disconnect the pow er cord before replacing any parts. The machine may operate if the treadle is depressed by mist[...]

S-7200C 11. REPLACING PARTS 132 １１ - ３ . Motor and timing belt < Timing belt remov al > 1. Remove the side plate (1). 2. Remove the five screw s (2), and then remove the motor cover (3). 3. T ilt back the machine head. 4. While pushing the ti ming belt (4) in the d irection of the arrow , turn the machine pulley (5) forward to remove th[...]

S-7200C 11. REPLACING PARTS 133 < Timing belt installation > 1. Place the timing belt (4) onto timing pulley U (14). 2. Secure the m otor (12) with the three scre ws (11). * Insert the motor (12) so that the upper set screws (8) on the joint (7) are facing toward the front and also so that the notch (b) on the motor shaft (15) is facing towar[...]

S-7200C 11. REPLACING PARTS 134 < Timing belt installation check > 1. Check that the needle and rotary hook timing is correct. (Refer to “10-12. Adjusting the needle and rotary hook timing”.) * If they are correct, conti nue from step 5, otherw ise continue from step 2. 2. Check that the needle and feed mechanism timing is correct. Turn t[...]

S-7200C 11. REPLACING PARTS 135 １１ - ４ . Rotary hook RP If replacing the standard rotary hook with a rotary hook RP (l ubrication-free rotary hook) on s ub-class -40[] or -43[] machines , use the following parts. S52936-001 (ROTARY HOOK, W/BOX) SB0414001 (SCREW, CAP) NOTE: When using the rotary hook RP (lubrication-free rotary hook), set the [...]

S-7200C 11. REPLACING PARTS 136 １１ - ５ . Feed bar shaft, lifting feed shaft When changing over these parts, apply grease as described bel ow and then install the parts to the sewing machine. * Use Brother-specifi ed grease (SA8837-001). 1. Apply grease to the holes of each part as shown in the arrow until a small amount of grease overflows. 2[...]

S-7200C 12. APPLYING GREASE (-[]3[], []5[] SPECIFICATIONS) 137 １２ . APPL YING GREASE (-[]3[], []5[] SPECIFICA TIONS) １２ - １ . When “GrEASEUP” appears…When using the G50 operation panel 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. ([...]

S-7200C 12. APPLYING GREASE (-[]3[], []5[] SPECIFICATIONS) 138 1. Turn the pow er switch to “OFF”. 2. Remove the screws and the set screws. 3 . Apply grea se to each of th e holes until the grea se 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 b[...]

S-7200C 12. APPLYING GREASE (-[]3[], []5[] SPECIFICATIONS) 139 １２ - ２ . When “GrUP” appears ... W h e n u s i n g t h e G 1 0 o p e r a t i o n p a n e l If “GrUP” flashes in the display (1) and the b uzzer sounds when the power ON switch is pressed, it means that it is time to add grease. (The sewing machine will not operate at this [...]

S-7200C 12. APPLYING GREASE (-[]3[], []5[] SPECIFICATIONS) 140 1. T urn the pow er switch to “OFF” . 2. Remove the screw s and the set screws. 3. Apply grease to each of the holes until the grease overflows slightly. 4. T ighten the screws and the set screws in order to push the grease in. 5. T urn the machine pulley by hand to move the needle [...]

S-7200C 13. SETTING METHOD FOR STANDA RD DEPRESSION STROKES 141 １３ . SETTING METHOD FOR ST ANDARD DEPRESSION STROKES DANGER Wait at least 5 minutes after turning off the power sw itch 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 [...]

S-7200C 13. SETTING METHOD FOR STANDA RD DEPRESSION STROKES 142 5 Memorizing the maximum backward position “Pd-- ” will appear in the main display (1). (With the treadle depressed backw ard to the maximum backward position , press the thread trimming key.) 6 Completion of setting The buzzer will sound and “ End” will appear in the main disp[...]

S-7200C 13. SETTING METHOD FOR STANDA RD DEPRESSION STROKES 143 １３ - ２ . When using the G10 operation panel 1 Signal setting entry (Press the power OFF switch, and then set DI P switch No. 4 to ON.) 2 “FF x.x” will appear in the display (1). (x.x indicates the depression voltage.) (While pressing the key at C, press the powe r ON switch.)[...]

S-7200C 13. SETTING METHOD FOR STANDA RD DEPRESSION STROKES 144 6 Completion of setting The buzzer will sound and “ End” will appear in the display (1). NOTE: ・ If you do not press the thread wiper key (2), the settings will not be memorized. ・ If the treadle is not operated correctly , “E091” may be displayed. If this happens, after ?[...]

S-7200C 14. CONTROL BOX AND MOTOR 145 １４ . CONTROL BOX AND MOT OR １４ - １ . Checking the motor and power supply CAUTION Turn off the power switch and disconnect the pow er cord from the wall outlet before ca rry ing out these operations. The machine may operate if the treadle is depress ed by mistake, which could result in injury. If the p[...]

S-7200C 14. CONTROL BOX AND MOTO R 146 １４ - ２ . Checking the solenoids DANGER Wait at least 5 minutes after turning off the power sw itch 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. <Machine head > 1. D[...]

S-7200C 15. STANDING OPERATION PEDAL 147 １５ . ST ANDING OPERA TION PEDAL The foot plug assembly CDD (J04099-101) that is sold separately is required. １５ - １ . Installing the foo t plug DANGER Wait at least 5 minutes after turning off the power sw itch and disconnecting the power cord from the wall outlet before opening the face plate of t[...]

S-7200C 15. STANDING OPERATION PEDAL 148 １５ - ２ . Connectors <At foot plug> <At pedal> Variable speed pedal 2120B 2121B 1867M Standing operation pedal No. 9P connector 1 DC+8 V 2 High-speed switch 3 T hread trimmer switch 4 SOV 5 S pare 6 Low-speed switch 7 Presser foot sw itch 8 V ariable speed input 9 Ground NOTE: Connector type[...]

S-7200C 16. WIRING DIAGRAMS (X-7200C) 149 １６ . WIRING DIAGRAMS (X-7200C) 2122B[...]

S-7200C 17. CONNECTOR LAYOUT DIAGRAM (MAIN PCB) 150 １７ . CONNECT OR LA YOUT DIAGRAM (MAIN PCB) (Continued on next page.) 2123B[...]

S-7200C 17. CONNECTOR LAYOUT DIAGRAM (MAIN PCB) 151 <Li st of conn ecto r nu mber s> Connector No. Name Description P8 Head detector unit connector P12 Solenoid-type pressure lifter connector P13 Sewing machine connector P6 Resolver connector P7 Operation panel connector Connects to connector from machine head. P3 Relay connector P4 Coupler c[...]

S-7200C 18. COMBINATION OF TRANSF ORMER SPECIFICATIONS AND CONTROL DEVICE SPECIFICATIONS 152 １８ . COMBINA T ION OF TRANSFORMER SPECIFICA T IONS AND CONTROL DEVICE SPECIFICA T IONS “X” indicates accessory parts which are not used. 2116B[...]

S-7200C 19. TROUBLESHOOTING 153 １９ . TROUBLESHOOTING ・ Please check the following points before calling for repairs or service. ・ If the following remedies do not fix the problem, turn off the po wer switch and consult a qualifi ed technician or the place of purchase. D A N G E R Wait at least 5 minutes after turning off the power sw itch a[...]

S-7200C 19. TROUBLESHOOTING 154 Problem Possible cause Page 5 Skipped stitches at sew ing start Thread unravelling at sewing start ・ Is the thread take-up spring tension too stron g? Reduce the tension of the thread take-up spring. ・ Is the thread take-up spri ng operating range too large? Lower the position of the thread take-up spring. ・ Ar[...]

S-7200C 19. TROUBLESHOOTING 155 Problem Possible cause Page 8 Material slippage ・ Is the presser foot pressure too strong? Adjust the presser foot pressure. Instruction manual 9 Lower thread is tangled at the sewing start. Spinning of bobbin during thread trimming ・ Is the bobbin spinning direction correct when the lower thread is being pulled?[...]

S-7200C 19. TROUBLESHOOTING 156 Problem Possible cause Page 13 Broken needle s ・ Is the material being pushed or pulled w ith excessive force during sewing? ・ Is the needle properly installed? If it is incorrect, install the needle correctly. ・ Is the needle bent, is the needle ti p broken, or is the needle hole blocked? Replace the needle. ?[...]

S-7200C 19. TROUBLESHOOTING 157 Problem Possible cause Page 18 Nothing appears on the operation panel display ・ Is the power supply connector disconnected from the control box? Insert the connector securely. ・ Is the operation panel connector P7 inside the control box disconnected? Insert the connector securely. ・ Are the relay connector of t[...]

S-7200C 19. TROUBLESHOOTING 158 １９ - ２ . Error code displays If an error code appears on the operation panel display 1. Make a note of the error c ode and then turn off the power. 2. After the operation panel display has turned off, eliminate the c ause of the error and then turn the power back on. ・ For items with “ * ” appearing in th[...]

S-7200C 19. TROUBLESHOOTING 159 Error code Possible cause Page E090 Treadle connector is not connected. ・ Is the 4-pin treadle connector in side the control box disconnected? Press the power OFF switch, and then che ck that the 4-pin treadle connector is connected to connector P14 on the main PCB. If there is a broken wire in the cord of the trea[...]

S-7200C 19. TROUBLESHOOTING 160 Error code Possible cause Page E150 Motor is overheating. ・ This is displayed when the motor bec omes abnormally hot and the temperature protection has activated. After the temperature has dropped, pre ss the power ON sw itch and oper ate the sewing machine as normal. E151 Problem with motor overheating sensor. ・[...]

S-7200C 19. TROUBLESHOOTING 161 Error code Possible cause Page E452 Head detector unit connection error ・ Is the 6-pin head detector unit connector inside the control box disconnected? Press the power OFF switch, and then c heck that the 6-pin head detector unit connector is connected to connector P8 on th e main PCB. 150-151 Instruction manual E[...]

S-7200C 20. 7-SEGMENT DISPLAY 162 ２０ . 7-SEGMENT DISPLA Y 4268M[...]

S-7200C I8120941B 2009. 05. B (1) SER VICE MANUAL Printed in Japan[...]