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SERVICE MANUAL
S-7200C
Please read this manual before making any adjustments.
SINGLE NEEDLE DIRECT DRIVE STRAIGHT LOCK STITCHER
WITH THREAD TRIMMER
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This service manual is intended for S-7200C; be sure to read the S-7200C instruction manual before this manual. Carefully read the “SAFETY INSTRUCTIONS” and the whole of this manual to understand this product before you start maintenance. As a result of research and improvements regarding this product, some details of this manual may not be the same as those for the product you purchased. If you have any questions regarding this product, please contact a Brother dealer.
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SAFETY INSTRUCTIONS [1] Safety indications and their meanings This service 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 The instructions which follow this term indicate situations where failure to follow the DANGER instructions will result in death o
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[2] Notes on safety 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 Environmental requirements Use the sewing machine in an area which is free The ambient temperature should be within the from sources of strong electrical noise such as range of 5 °C to 35 °C during use. electrica
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CAUTION Sewing This sewing machine should only be used by Attach all safety devices before using the sewing operators who have received the necessary training machine. If the machine is used without these in safe use beforehand. devices attached, injury may result. The sewing machine should not be used for any Do not touch any of the moving parts or press any applications other than sewing. objects against the machine while sewing, as this may result in personal injury o
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[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 Touching areas where high voltages are present can Be careful not to get your hands 2 4 result in severe injury. Turn off the power before caught when returning the opening the cover. machine head to its
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S-7200C
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CONTENTS 7-6-1. Thread trimming mechanism operation 1. MACHINE SPECIFICATIONS.............. 1 sequence.................................................... 63 2. NOTES ON HANDLING........................ 2 7-6-2. Upper and lower thread trimming sequence ...65 7-7. Tension release mechanism................................ 66 3. COMPARISON OF FUNCTIONS 7-8. Thread wiper mechanism (option device)............ 67 (G50 AND G10 OPERATION PANELS)... 3 8. DISASSEMBLY............................
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9-10. Knee lifter lever mechanism ..............................98 10-19. Adjusting the rotary hook lubrication amount (-[]0[], []3[] specifications).............................. 130 9-11. Needle bar and thread take-up mechanism.......99 9-12. Presser foot mechanism .................................. 100 11. REPLACING PARTS........................ 131 9-13. Feed rock shaft................................................ 101 11-1. Fixed knife.......................................
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1. MACHINE SPECIFICATIONS １. MACHINE SPECIFICATIONS 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 For medium- For heavy-weight and difficult-to-sew weight materials materials materials -33S, -43S -453 -303, -403 -305 -45S -333, -433 -405 Max. sewing speed 4,000 sti/min 5,000 sti/min * 4,500 sti/min * Start backtacking and continuous 220 - 3,000 sti/min backtacking sp
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2. NOTES ON HANDLING 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 electronic interference from the sewing machine. ・ The sewing machine should be plugged directly into an AC wall outlet. Operation problems may result if extension cords are used. 2086M Carrying the machine ・ The machine should be carried by t
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3. COMPARISON OF FUNCTIONS (G50 AND G10 OPERATION PANELS) ３. COMPARISON OF FUNCTIONS (G50 AND G10 OPERATION PANELS) G10 operation panel G50 operation panel Normal sewing (*1) ○ ○ 1985B Start backtack sewing ○ ○ 1986B End backtack sewing ○ ○ 1987B Continuous backtack sewing ○ ○ Sewing pattern 3655M Fixed stitch sewing - ○ 0827M Name label sewing - ○ 0835M Pleat presser sewing - ○ 2163M Program sewing - ○
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4. FUNCTION SETTINGS (G50 OPERATION PANEL) ４. FUNCTION SETTINGS (G50 OPERATION PANEL) ４-１. List of advanced functions This section contains a list of advanced functions and the key operations which are used to call the setting mode for the functions. 1988B Maximum sewing speed and start backtack sewing speed setting 1 Release the lock ＋ Refer to “4-3. Maximum sewing speed and start backtack sewing 1989B speed setting methods”. Memory switc
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4. FUNCTION SETTINGS (G50 OPERATION PANEL) ４-２. List of special functions when power is turned on This section contains a list of functions for the G50 operation panel and the key operations which are used to call the setting mode for the functions. 1991B 1992B Memory switch setting mode (Advanced) Protect setting mode 1 6 [DIP switch 1 = OFF] (C) Refer to “4-6. Memory switch setting method (Advanced)”. Refer to “4-11. Protection settings”.
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4. FUNCTION SETTINGS (G50 OPERATION PANEL) 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. 2001B Maximum sewing speed Start backtack sewing speed 1 The main display (2) will change from an orange display to a green display. 2002B Maximum sewing speed setting 2 ・ The maximum sewing speed can be set to a speed from 220 sti/min to the maximum sew
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4. FUNCTION SETTINGS (G50 OPERATION PANEL) ４-４. Using the LOCK key Control box 2006B 4221M When the power switch is turned on, the LOCK key (1) turns on. (The icon (2) is illuminated.) This causes all key operations which have been set using the protect settings feature to become disabled, and you can use this feature to prevent setting values from being changed by accident. * For details on the protect settings feature, refer to “4-11. Protecting settings”.
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4. FUNCTION SETTINGS (G50 OPERATION PANEL) 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 carrying out the following operations. ・ If the MAX key icon (2) is on, press the MAX key to return the main display to stitch number display (orange). 2007B Change to memory switch mode 1 The memory switch number (A) and the setting details (B) for that
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4. FUNCTION SETTINGS (G50 OPERATION PANEL) Presser foot lifter operation and pedal operation settings (001-) Setting Initial Setting No. Setting details range value units Presser foot status when treadle is returned to neutral after thread trimming 001 ON/OFF OFF - ON: Presser foot does not drop OFF: Presser foot drops (Presser foot will not drop if No. 851 is set to OFF.) Presser foot status after treadle stops at neutral 002 ON/OFF OFF - ON: Presser foot lifts OFF: Presser foot d
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4. FUNCTION SETTINGS (G50 OPERATION PANEL) Sewing machine motor settings (100-) Setting Initial Setting No. Setting details range value units 1-99 2 100 1 Number of slow start stitches (needles) (needles) Pedal response switching settings immediately after sewing has started OFF: No switching 101 OFF/1-3 OFF 1 1: Slow start only when sewing starts after thread trimming 2: Slow start only when sewing starts after sewing has been paused 3: Slow start always when sewing starts Pe
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4. FUNCTION SETTINGS (G50 OPERATION PANEL) Sewing program settings (400-) Setting Initial Setting No. Setting details range value units Start backtack sewing pattern * If A=0, there is no A operation, and if B=0, there is no B operation. 2: A-B 400 2-6 2 1 3: B-A-B 4: A-B-A-B 5: B-A-B-A-B 6: A-B-A-B-A-B End backtack sewing pattern * If C=0, there is no C operation, and if D=0, there is no D operation. 2: C-D 401 2-6 2 1 3: C-D-C 4: C-D-C-D 5: C-D-C-D-C 6: C-D-C-D-C-D Conti
