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Brother HE-800B Service Manual

Electronic direct drive lockstitch button holer.
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HE-800B
SERVICE MANUAL
Please read this manual before making any adjustments.
ELECTRONIC DIRECT DRIVE LOCKSTITCH BUTTON HOLER

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Table of Contents

Troubleshooting

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   Summary of Contents for Brother HE-800B

  • Page 1 HE-800B SERVICE MANUAL Please read this manual before making any adjustments. ELECTRONIC DIRECT DRIVE LOCKSTITCH BUTTON HOLER...
  • Page 2 This service manual is intended for HE-800B; be sure to read the HE-800B instruction manual before this manual. Carefully read the “SAFETY INSTRUCTIONS” below 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.
  • Page 3 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”.) HE-800B...
  • Page 4 Furthermore, do not excessively bend the cords or secure them too firmly Contact your Brother dealer or a qualified electrician with staples, otherwise there is the danger that fire or for any electrical work that may need to be done.
  • Page 5 If only one hand is used, the weight of the machine head Ask your Brother dealer or a qualified electrician to may cause your hand to slip, and your hand may get carry out any maintenance and inspection of the caught.
  • Page 6 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. *Safety devices...
  • Page 7 4730M Oil tank (accessory) 4731M 4732M HE-800B...
  • Page 8: Table Of Contents

    7-12-3. Adjusting the lateral position of the upper 5-10. thread scissors at the sewing start ....98 Lower thread trimmer mechanism ...... 47 7-12-4. Adjusting the longitudinal position of the 5-10-1. Lower thread clamp open at the sewing start upper thread scissors........98 Open ················································ 48 HE-800B...
  • Page 9 Upper thread breakage ........148 11-2. Skipped stitches..........149 11-3. Uneven seams (1)……At the sewing start ..151 11-4. Uneven seams (2)……Lower thread is lifted up at the sewing start ........152 11-5. Uneven seams (3)……Seam lifts up at the sewing start............152 HE-800B...
  • Page 10: Specifications

    SD memory card (No guarantees of operation can be given for any media.) Single-phase 100V / 220V, 3-phase 220V / 380V / 400V Power supply (For single-phase 100 V and three-phase 380 V/400 V, the trans box is required.) HE-800B...
  • Page 11: Standard Sewing Pattern List

    1. SPECIFICATIONS 1-2. Standard sewing pattern list Rectangle Radial Round Straight bar tack Rear tack Front tack Radial-rectangle Round-rectangle Eyelet-rectangle Rectangle-radial Round-radial Eyelet-radial Rectangle-round Radial-round Eyelet-round Rectangle-taper tack Radial-taper tack Round-taper tack Eyelet-taper tack Rectangle-tack Radial-tack Round-tack Eyelet-tack HE-800B...
  • Page 12: Notes On Handling

    * While supporting the arm with both hands, gently lower it. 0598D Returning the machine head to the upright position 1. Pack away any tools which are near the table. 2. While supporting the arm with both hands, gently return the machine head to its original position. 0599D HE-800B...
  • Page 13: Function Settings

    Software version display function 0602D 0605D Refer to “3-3. Setting memory switches (Advanced)”. Refer to “3-9. Confirming software version”. Input check function Error log display function 0603D 0606D Refer to “3-7. Input checking method”. Refer to “3-6. Checking the error history”. HE-800B...
  • Page 14 Version update 0611D 0608D Refer to “7-22. Standard settings for treadle Refer to “4-11. Updating the control program version”. depression stroke”. Upper shaft motor standard position adjustment mode 0609D Refer to “7-20. Adjusting the upper shaft motor reference position”. HE-800B...
  • Page 15: List Of Advanced Functions

    3-2. List of advanced functions This list shows the key operations for using advanced functions. 0612D Lower thread counter setting mode Production counter setting mode 0613D 0614D Refer to the CD Instruction Manual. Refer to the CD Instruction Manual. HE-800B...
  • Page 16: Setting Memory Switches (advanced)

    4794M To change the settings for other memory switch Nos., repeat the operations in steps 2 to 4 above. 4917M Press the TEST key to exit memory switch mode. Flashing Normal sewing machine operation will then be possible. 4857M HE-800B...
  • Page 17: List Of Memory Switches

    8: Returns to neutral when the work clamp switch is released, intermediate lowering enabled, and starting allowed when at neutral. *1 This is not initialized during initialization mode. Also not overwritten from SD card. HE-800B...
  • Page 18 Needle up stop position correction. -7 to 7 Setting can be carried out in units of 1°. -: Stopping position becomes earlier. +: Stopping position becomes later. HE-800B...
  • Page 19 1: Lower thread counter 2: Production counter 4926M Production counter operation by cycle sewing units during cycle sewing. ON/OFF OFF: Counts in units of individual programs (1 hole). ON: Counts in units of individual cycle programs. HE-800B...
  • Page 20 Number of stitches for upper thread breakage judgment. 2 to 7 * Displayed when No. 554 above is set to “ON”. An upper thread breakage error occurs when the upper thread breakage signal is continuously ON for the set number of stitches. HE-800B...
  • Page 21 * Thread winding is carried out at the speed specified at the operation panel. ON: Upper limit is limited to 2000 sti/min. * If the speed specified at the operation panel exceeds 2000 sti/min, thread winding will be limited to 2000 sti/min. HE-800B...
  • Page 22 (Width x Length) 6.8 x 47.0mm 4.0 x 40.0mm 5.4 x 40.0mm 7.3 x 24.5mm 4.0 x 20.0mm 6.0 x 20.0mm 7.3 x 36.0mm 4.0 x 32.0mm 6.0 x 32.0mm 7.3 x 47.0mm 4.0 x 40.0mm 6.0 x 40.0mm HE-800B...
  • Page 23: Pedal Operation Mode Setting Method

    Work clamp Work clamp Work clamp Work clamp maximum drop neutral intermediate raised + sewing drop position machine start Insertion and removal of the Sewing Normal position Buttonhole positioning material After sewing Raised Neutral Intermediate drop Maximum drop HE-800B...
  • Page 24 Work clamp + lifts neutral position maximum drop Sewing machine starts Work clamp maximum drop Work clamp Work clamp Work clamp + lifts neutral position intermediate drop Sewing machine starts * The start switch is enabled at statuses indicated by HE-800B...
  • Page 25: Checking The Error History

    While the FUNC key (3) is being pressed, the error codes will be removed from the display and the production counter when the error occurred will be displayed as 10 digits. 3. Press the TEST key (4) to return to the normal display. The sewing machine will switch to home position detection standby. HE-800B...
  • Page 26: Input Checking Method

    (1) or the key (2) to select the desired item number. 3. Refer to the input check list to check the key and sensor responses. 4. When returning to normal operation, turn power off and then on again. HE-800B...
  • Page 27 * When the power is turned on, the position will be “0”. Treadle analog value. Depress the treadle. 0 to 255 When depressed forward, the value increases. * Should normally display somewhere around 109 when at the neutral position. HE-800B...
  • Page 28 ON/OFF FUNC key. ON/OFF Option input 2. ON/OFF Option input 3. ON/OFF Option input 4. ON/OFF Option input 5. ON/OFF Option input 6. ON/OFF Option input 7. ON/OFF Option input 8. ON/OFF Option input 9. ON/OFF Option input 10. HE-800B...
  • Page 29: Output Checking Method

    5. For item numbers 54 and after, depress the treadle to the 2nd step. (Start switch for a triple pedal) * The operation for the item being checked will be carried out while the treadle is being depressed. 6. When returning to normal operation, turn power off and then on again. HE-800B...
  • Page 30 Option output 14 will turn on. Option output 15 will turn on. Option output 16 will turn on. Option output 17 will turn on. Option output 18 will turn on. Option output 19 will turn on. Option output 20 will turn on. HE-800B...
  • Page 31: Confirming Software Version

    (3) is pressed. 0622D Main control program Motor control program Panel control program Main IPL Motor IPL Panel IPL 3. Press the TEST key (5) to return to the normal display. The sewing machine will switch to home position detection standby. HE-800B...
  • Page 32: Protection Settings

    9. Repeat steps 6 to 8 above for each item, and then press the TEST key (2). * The protect setting mode will be exited and the sewing machine will change to home position standby. * To return to the protection level setting status (step 2 above), press the FUNC key (7). HE-800B...
  • Page 33 Protect setting mode can only be started using Method B. 3. Press the ENTER key (3) to store the starting method. 4. For the method of operation from this point onward, refer to steps 2 to 9 in “Method A” (previous page). HE-800B...
  • Page 34 × × × Production counter editing × × × Lower thread counter editing × × × Resewing after sewing is interrupted × × Home position adjustment Upper shaft motor reference position × × adjustment × × Treadle position adjustment HE-800B...
  • Page 35: Using Sd Cards

    SD memory card, change the name of the folder. memory switch Same as above ISMMSW.SEW data cycle program Same as above ISMCYC.SEW data Error log data \BROTHER\ISM\ISMLDT\ Stores the files which relate to error logs. HE-800B...
  • Page 36: Preparation For Reading And Writing Data

    All sewing machine data (program data, memory switch data and cycle program data) is read from the SD card. All sewing machine data (program data, memory switch data and cycle program data) is written to the SD card. Error log data is written to the SD card. HE-800B...
  • Page 37: Reading Program Data (parameters)

    • If you would like to read more data, press the key to select the read/write menu, and then read the data. 0804D Exit data read/write mode. Press any one of the following four keys to exit data read/write mode. 0662D HE-800B...
  • Page 38: Writing Program Data (parameters) To An Sd Memory Card

    • If you would like to read more data, press the key to select the read/write menu, and then read the data. 0806D Exit data read/write mode. Press any one of the following four keys to exit data read/write mode. 0662D HE-800B...
  • Page 39: Reading Memory Switch Data

    • If you would like to read more data, press the key to select the read/write menu, and then read the data. 0807D Exit data read/write mode. Press any one of the following four keys to exit data read/write mode. 0662D HE-800B...
  • Page 40: Writing Memory Switch Data To The Sd Card

    • If you would like to read more data, press the key to select the read/write menu, and then read the data. 0808D Exit data read/write mode. Press any one of the following four keys to exit data read/write mode. 0662D HE-800B...
  • Page 41: Reading Sewing Machine Data

    • If you would like to read more data, press the key to select the read/write menu, and then read the data. 0809D Exit data read/write mode. Press any one of the following four keys to exit data read/write mode. 0662D HE-800B...
  • Page 42: Writing Sewing Machine Data To An Sd Card

    • If you would like to read more data, press the key to select the read/write menu, and then read the data. 0810D Exit data read/write mode. Press any one of the following four keys to exit data read/write mode. 0662D HE-800B...
  • Page 43: Writing Error Log Data To An Sd Card

    • If you would like to read more data, press the key to select the read/write menu, and then read the data. 0811D Exit data read/write mode. Press any one of the following four keys to exit data read/write mode. 0662D HE-800B...
  • Page 44: Updating The Control Program Version

    • The buzzer will sound and updating of the program version will start. • While version updating is in progress, the progress status will be displayed. • When “Updated” is displayed on the screen, version updating is complete. 0640D Turn off the power switch. HE-800B...
  • Page 45: Mechanical Descriptions

    5-1. Needle bar and thread take-up mechanisms Rotation direction 0641D 1. Motor 2. Upper shaft 3. Needle bar crank 4. Needle bar crank 5. Thread take-up crank <5> Thread take-up assembly 6. Slide block 7. Needle bar clamp 8. Needle bar HE-800B...
  • Page 46: Upper Shaft, Lower Shaft And Rotary Hook Mechanisms

    5. MECHANICAL DESCRIPTIONS 5-2. Upper shaft, lower shaft and rotary hook mechanisms Rotation direction 0642D 1. Motor 2. Upper shaft 3. Joint assy 4. Timing belt 5. Timing pulley 6. Lower shaft 7. Rotary hook joint 8. Rotary hook HE-800B...
  • Page 47: Needle Zigzag Mechanism

    5. MECHANICAL DESCRIPTIONS 5-3. Needle zigzag mechanism 0643D 1. Pulse motor 2. Zigzag connecting rod 3. Zigzag lever 4. Zigzag lever F assembly 5. Needle bar bracket slide block 6. Needle bar bracket HE-800B...
  • Page 48: Presser Foot Lifter Mechanism

    4. Presser foot lifter connecting rod 5. Knee lifter lever 6. Upper thread trimmer driving link 7. Knee lifter lever 8. Presser bar guide bracket assembly 9. Presser bar 10. Presser roller bracket 11. Feed arm support 12. Work clamp HE-800B...
  • Page 49: Feed Mechanism

    <5> Length feed plate 6. Work clamp 0645D 5-6. Cutter mechanism 1. Cutter solenoid 2. Cutter link bracket 3. Slide block 4. Cutter driving arm 5. Cutter driving link 6. Driving shaft holder assembly 7. Cutter driving shaft 0646D HE-800B...
  • Page 50: Thread Breakage Detection Mechanism

    5. MECHANICAL DESCRIPTIONS 5-7. Thread breakage detection mechanism 0647D 1. Thread guide 2. Thread breakage perceiving shaft 3. Cutter bar fixed plate assembly 4. Sensor HE-800B...
  • Page 51: Tension Release Mechanism

    3. Presser driving arm 4. Presser foot lifter connecting rod 5. Knee lifter lever 6. Upper thread trimmer driving link 7. Tension release driving lever 8. Tension release shaft 9. Tension release cam 10. Tension release pin 11. Tension disc pressers 0649D HE-800B...
  • Page 52: Upper Thread Trimmer Mechanism

    After 1.5-2.5 mm of feed, the The upper thread is clamped upper thread scissors and cut. gradually start to open. After approximately 4.6mm of Sewing ends. The upper thread scissors feed, the upper thread move forward. scissors are fully open. 1739B HE-800B...
  • Page 53 3. Presser driving arm 4. Presser foot lifter connecting rod 7. Trimmer driving lever <7> Driving lever 5. Knee lifter lever 8. Longitudinal feed arm <8> Trimmer driving arm 9. Upper thread trimmer lever 10. Setting plate 11. Upper thread trimmer assembly HE-800B...
  • Page 54: Upper Thread Scissors Gradually Opens

    5. MECHANICAL DESCRIPTIONS 5-9-1. Upper thread scissors Gradually opens 0653D 0654D 1. Opening cam 2. Scissors M HE-800B...
  • Page 55: Upper Thread Scissors Open

    5. MECHANICAL DESCRIPTIONS 5-9-2. Upper thread scissors Open 0656D 0657D 0658D 1. Cam 4. Back stopper (1) Feed arm 2. Back plate 5. Upper thread trimmer lever (2) Extension spring 3. Stop plate 6. Upper thread trimmer assembly HE-800B...
  • Page 56: Lower Thread Trimmer Mechanism

    9. Lower thread trimmer link 10. Lower thread trimmer connecting rod 11. Knife driving lever 12. Collar <12> Fixed knife set 13. Lever 14. Lower thread retainer 15. Lower thread clamp plate 16. Lower thread presser 17. Fixed knife set 0659D HE-800B...
  • Page 57: Lower Thread Clamp Open At The Sewing Start

    5. MECHANICAL DESCRIPTIONS 5-10-1. Lower thread clamp open at the sewing start Open 0661D 1. Feed guide shaft B (1) Spring 2. Roller (2) Lower thread presser 3. Opening plat 4. Collar 5. Lower thread clamp plate HE-800B...
  • Page 58: Assembly

    Turn off the power switch before disassembly, Brother will not be held responsible for any accidents otherwise the machine may operate if the foot switch or problems resulting from the use of non-genuine is depressed by mistake, which may result in injury.
  • Page 59: Lower Shaft And Idle Pulley Mechanisms

    Refer to the detailed descriptions on the next page for details on A to G in the illustration. Gently push while installing. Insert as far as the bottom of the hole. Install so that there is no play. Set so that the worn surface is facing toward the bush. 0663D HE-800B...
  • Page 60 As a guide for the lubrication amount, the optimum position can be obtained if the screw (29) is tightened as much as possible and then loosened about two turns. Refer to “7-19. Adjusting the rotary hook lubrication” to check and adjust the lubrication amount. 0667D 0668D HE-800B...
  • Page 61: Lower Thread Trimmer Mechanism

    Refer to the detailed descriptions on the next page for details on A to C in the illustration. Apply the grease specified by Brother (Power Knock WB2 from JX Nippon Oil & Energy) in the places indicated by Tighten so that (11) moves smoothly with no play.
  • Page 62 (56). (61) and the edge of the bed is approximately 12.5 mm. Bobbin case Install so that the end of the bobbin presser (61) is at the center of the bobbin case. 0671D HE-800B...
  • Page 63: Feed Mechanism

    (48) is moved forward and back. Be careful to install so that the motor harness opening is facing correct way. Refer to C Tighten so that (6) moves back and forth smoothly. 0708D HE-800B...
  • Page 64 20. Set screws [2 pcs] 40. Plain washer 0673D 0772D Align reference line A on feed guide shaft B with the edge of the Assemble as shown in the illustration. feed arm support base, and then tighten the set screw (10). HE-800B...
  • Page 65 The belt tension gauge should be set to measure a unit weight of 0.25 gf/cm, a belt width of 10 mm and a span length of 169 mm. [Reference] If no belt tension gauge is available, use a push pull gauge to apply 98N of force to the notch in the motor mounting bracket (20) while tightening the three screws (23). HE-800B...
  • Page 66: Threading Mechanism

    Refer to the detailed descriptions on the next page for details on A to C in the illustration. Apply the grease specified by Brother (Power Knock WB2 from JX Nippon Oil & Energy) in the places indicated by Insert from the face plate side.
  • Page 67 L (28) to 0.5 mm or more opening amount is 0.5 to 1.0 mm when the tension when the needle bar is at its highest point at the maximum release link (11) is moved in the direction of B. right zigzag position (3 mm). HE-800B...
  • Page 68: Presser Lifter Mechanism

    Refer to the detailed descriptions on the next page for details on A to D in the illustration. Apply the grease specified by Brother (Power Knock WB2 from JX Nippon Oil & Energy) in the places indicated by Tighten the four socket...
  • Page 69 While pushing the tension release shaft (19) in the direction of the arrow A, and also pushing the tension release driving lever (16) in the direction of the arrow B, tighten the set screw (22) on the screw flat of the tension release shaft (19). HE-800B...
  • Page 70 6. ASSEMBLY Zigzag motor Screw stop side Presser lifter motor Index mark Screw stop side 0680D Direction of the harness Presser lifter motor Zigzag motor Index marks aligned 0681D 0691D HE-800B...
  • Page 71: Needle Zigzag Mechanism

    8. Felt 14. Wick 3. Zigzag lever 9. Fastening bands [2 pcs] 15. Motor lever shaft 4. Zigzag connecting rod 10. Zigzag lever shaft 16. Washer 5. Set screw 11. Thrust collar 17. Set screw 6. Wick 12. Zigzag lever HE-800B...
  • Page 72 * At this time, tighten so that there is no play in the thrust direction. Align the center of cutter groove and the tip of the 0683D needle. Motor bracket Motor lever Align the reference line on the motor bracket index hole the motor lever. 0684D HE-800B...
  • Page 73: Cutter Mechanism

    Refer to the detailed descriptions on the next page for details on A to E in the illustration. Apply the grease specified by Brother (Power Knock WB2 from JX Nippon Oil & Energy) in the places indicated by Check that the plunger of the cutter solenoid (18) moves easily along the full length of its stroke.
  • Page 74 * Lift up the cutter driving shaft by hand at this time and check that it moves by its own weight. If it does not move, loosen the socket bolt (27) and the screw (28) and readjust the cutter driving shaft so that it moves easily. 0689D HE-800B...
  • Page 75 6. ASSEMBLY 0690D 0688D HE-800B...
  • Page 76: Upper Shaft And Tension Pulley Mechanisms

    Align the screw at the front in the turning direction with the screw stop on (3), and then tighten the screw. Touch against edge of (10) and then tighten. Set so that the harnesses are pointing directly downward. 0713D HE-800B...
  • Page 77 If no belt tension gauge is available, use a push pull gauge to apply 98 N of force to the tension pulley plate (29) to push it in the direction of the arrow, and then 0694D tighten the two socket bolts (32). HE-800B...
  • Page 78: Lubrication Mechanism

    6. ASSEMBLY 6-9. Lubrication mechanism Refer to the detailed descriptions on the next page for details on A to H in the illustration. Carry out the steps from (1) through to (13) in “6-4. Threading mechanism”. 0714D HE-800B...
  • Page 79 (5), cover. screw (7) and washer (6). 2) Install the felt holder (2) with the screw (3), and then 2) Clamp the oil tube assembly (1) under the cord holder secure the oil tube assembly (1). (5). HE-800B...
  • Page 80 1) Pass the wick (20) through the tube support U (21) and push it firmly into the zigzag lever shaft lubrication hole. 2) Install the tube support U (21) with the screw (22). 3) Pass the oil tube (23) around the outside of the tube support U (21) as shown in the illustration. HE-800B...
  • Page 81 3) Pass the oil tube (24) around the outside of the tube support U (21) as shown in the illustration so that it does not touch the solenoid stopper, and then pass it in between the cutter solenoid and the arm. HE-800B...
  • Page 82 (38) with the fastening band (46). 10) Install the wick base support (38) with the two screws (47). 11) Insert the felt (48), and then install the cap (49) with the screw (50). HE-800B...
  • Page 83 9) Install the pump filter (63) to the oil filter bracket (66) with the two springs (64) and the two screws (65). 10) Insert the oil tube (54) that is connected between the plunger and the filter through the oil filter bracket (66). 11) Install the oil filter bracket (66) to the bed with the three screws (67). HE-800B...
  • Page 84: Needle Bar And Thread Take-up Mechanisms

    6. ASSEMBLY 6-10. Needle bar and thread take-up mechanisms Apply the grease specified by Brother (Power Knock WB2 from JX Nippon Oil & Energy) in the places indicated by Insert the needle bar (9) into the Tighten so that the...
  • Page 85 26. Stopper k. Felt 12. Needle bar clamp assembly 27. Screws [2 pcs] l. Wick 13. Needle bar guide 28. Needle bar thread guide m. Slide block 14. Set screws [2 pcs] 29. Needle 15. Screw 30. Set screw HE-800B...
  • Page 86: Presser Bar Mechanism

    Refer to the detailed descriptions on the next page for details on A to E in the illustration. Apply the grease specified by Brother (Power Knock WB2 from JX Nippon Oil & Energy) in the places indicated by Tighten so that the presser bar moves smoothly.
  • Page 87 3) While pushing the presser bar (12) down from above, tighten the set screw (21) so that the roller (4) is not at an angle to the V-shaped groove in the presser arm . 4) Remove the gauge and turn off the power. HE-800B...
  • Page 88: Upper Thread Trimmer Mechanism

    6. ASSEMBLY 6-12. Upper thread trimmer mechanism Apply the grease specified by Brother (Power Knock WB2 from JX Nippon Oil & Energy) in the places indicated by Align edges Attach larger hook of the spring to the pin on the arm.
  • Page 89: Thread Breakage Detector Mechanism

    11. Screws [2 pcs] (Temporarily 3. Plain washer tighten) 4. Plain washer 12. Sensor 5. Screw 13. Screw 6. Cutter bar fixed plate 14. Thread breakage sensor plate 7. Balancer 15. Screws [2 pcs] (Fully tighten) 8. Screw 0721D HE-800B...
  • Page 90: Rotary Hook Mechanism

    3. Rotary hook 5. Rotary hook holder 2. Set screw [2 pcs] (Provisionally 4. Set screw [2 pcs] (Provisionally 6. Screws [2 pcs] tighten) tighten) Adjust the needle clearance and timing. (Refer to “7-4. Adjusting the needle and rotary hook timing”.) HE-800B...
  • Page 91: Covers

    3. Main plate 9. Screws [6 pcs] 15. Wave washer 4. Screws [4 pcs] 10. Top cover 16. Shoulder screw 5. Eye guard assembly 11. Screws [6 pcs] 17. Knob screw 6. Washer 12. Slide cover 18. Screws [4 pcs] HE-800B...
  • Page 92: Adjustment

    Brother dealer or a qualified Use only the proper replacement parts as electrician to carry out any maintenance and specified by Brother.
  • Page 93: Adjusting The Home Position

    4441Q • When the sewing machine has switched to home position adjustment mode, the TEST indicator will flash. Flashing 0813D Select the home position menu. Press the key. 0630D HE-800B...
  • Page 94: Needle Zigzag (x) Motor Home Position

    End adjustment mode. Once home position adjustment operation is finished, press the TEST key. • Normal sewing machine operation will then be possible. Flashing → Illuminates To carry out home position adjustment for another motor Press the key. 0630D 0816D HE-800B...
  • Page 95: Feed (y) Motor Home Position

    End adjustment mode. Once home position adjustment operation is finished, press the TEST key. • Normal sewing machine operation will then be possible. Flashing → Illuminates To carry out home position adjustment for another motor Press the key. 0630D 0816D HE-800B...
  • Page 96: Work Clamp (p) Motor Home Position

    End adjustment mode. Once home position adjustment operation is finished, press the TEST key. • Normal sewing machine operation will then be possible. Flashing → Illuminates To carry out home position adjustment for another motor Press the key. 0630D 0816D HE-800B...
  • Page 97: Adjusting The Needle Bar Height

    9. Press the THREAD key. 4878M Note: If the installation positions are not correct, the needle bar (1) and the cutter may touch when the needle Cutter zigzags, which may result in noise or cause the needle to break. 4290Q HE-800B...
  • Page 98: Adjusting The Needle And Hook Timing

    Close the slide cover (2) and secure it. The inner pulley (5) rotates during sewing, so do not touch it, otherwise injury may occur. Mark 10. Gently return the machine head to its original position. 11. Press the THREAD key. 4882M 4883M HE-800B...
  • Page 99 7. ADJUSTMENT Needle plate thickness Application Gauge S13595-001 Gauge 815-2 Clothing (-2) Knitted wear 4294Q S13596-001 Gauge 815-3 Knitted wear (-3) 4292Q 4295Q S13597-001 Gauge 805-2 Thin knitted wear 4293Q 4296Q HE-800B...
  • Page 100: Adjusting The Clearance Between Needle And Hook Tip

    3. Gently return the machine head to its original position. 3977Q 7-6. Adjusting the work clamp pressure The standard distance A is 30 mm (approximately 30 N). Loosen the nut (1) and turn the adjusting screw (2) to adjust the work clamp pressure. 3978Q HE-800B...
  • Page 101: Adjusting The Work Clamp Lift Amount

    * Adjust the lift amount (including the play in the work clamp (1) and the pin (3) to 10 mm. If it is set to more than 10 mm, the work clamp will start lifting before lower thread trimming is complete, which may result in thread trimming errors. Furthermore, it may also cause the presser foot lifter pulse motor to go out of step. HE-800B...
  • Page 102: Adjusting The Work Clamp Lateral Position

    Loosen the screw (3), and then adjust the cutter sensor setting plate (4) so that there is a clearance of 4.5 ± 0.5 mm between the side of the cutter sensor (1) and the edge of the solenoid stopper (2). 4301Q HE-800B...
  • Page 103: Adjusting The Cutter Installation Position

    4. Check that the edge of the cutter holder (10) is touching the stepped section of the cutter driving shaft (11), and then tighten the bolt (9). 5. After adjusting, push the upper thread scissors (2) back to its original position (Fig. A). HE-800B...
  • Page 104: When Using The Special Needle Plate (needle Plate -rb)

    Note: ・When the cutter is driven by the solenoid, the movement will be approximately 2 mm greater than that shown in the illustration. ・If the cutter does not cut properly, the cutter may get stuck in the material and not return. If this happens, replace or sharpen the cutter. HE-800B...
  • Page 105: Adjusting The Upper Thread Trimming

    7-12-5. Adjusting the cutting depth of the upper thread scissors 0798D 7-12-6. Adjusting the installation height of the upper thread scissors 4317Q 7-12-7. Adjusting the upper thread scissors gradual opening timing 1775B 7-12-8. Adjusting the upper thread scissors opening timing 4319Q HE-800B...
  • Page 106: Adjusting The Longitudinal Feed Arm Assembly Position

    2. Check that the overlap between the stopper (2) fixed to the trimmer driving arm assembly (1) with the bolt and the stop plate (4) of the upper thread trimmer lever set (3) is 1 mm. 3. If adjustment is necessary, loosen the bolt (5) and move the trimmer driving arm assembly (1) back and forward to adjust. HE-800B...
  • Page 107: Adjusting The Lateral Position Of The Upper Thread Scissors At The Sewing Start

    2. Loosen the two screws (3), and then move the upper thread scissors assembly (2) back and forward to adjust so that the front ridge line of upper thread scissors U (4) is aligned with the edge of the needle hole. Note: If this adjustment is not carried out, it may result in thread trimming errors or needle breakages. HE-800B...
  • Page 108: Adjusting The Cutting Depth Of The Upper Thread Scissors

    (6) and the opening cam bracket (8) is 0 - 0.3 mm. Note: If the stopper (7) is adjusted so that it presses too firmly, it may cause the presser foot lifter pulse motor to go out of step. HE-800B...
  • Page 109: Adjusting The Installation Height Of The Upper Thread Scissors

    * If the tilting of the work clamp (6) causes skipped stitches to occur when sewing material joints, use the accessory auxiliary sheet (7) as shown in the illustration. HE-800B...
  • Page 110: Adjusting The Upper Thread Scissors Gradual Opening Timing

    (2) from opening when the work clamp is lowered. 4. Apply grease to the inclined face D of the opening cam (1). 5. Check that the upper thread scissors (2) gradually start opening after the material has been fed by 1.5 - 2.5 mm. HE-800B...
  • Page 111: Adjusting The Upper Thread Scissors Opening Timing

    2 mm. * If you would like the scissors to start opening earlier, make this clearance smaller. 4. Check the operation in test feed mode. * Refer to the operating procedure given in “5-9. Upper thread trimmer mechanism”. HE-800B...
  • Page 112: Adjusting The Overlapping Amount Of The Upper Thread Scissors And The Work Clamp

    * Make sure that the position (distance A) which was set in steps 1 and 2 does not change at this time. 6. Turn on the power, depress the treadle to move the feed mechanism to the home position, and then switch to test mode and check that the scissors D assembly (1) is always overlapping the work clamp (2). HE-800B...
  • Page 113: Adjusting The Lower Thread Trimming

    If the lower thread retaining amount is too great This can cause problems such as poor sealing at the sewing start, or wound lower thread sticking out of the rear tack. HE-800B...
  • Page 114: Adjusting The Lower Thread Clamp Opening Timing

    Note: After moving the lower thread trimmer cam lever (6) back in the direction of the arrow, move the feed mechanism. If the feed mechanism is moved when the lower thread trimming has been carried out, the mechanisms will press against each other, which may result in damage to the lower thread clamp (5) and the opening plate (4). HE-800B...
  • Page 115: Adjusting The Lower Thread Clamp Opening Amount

    4. Turn off the power, move the lower thread trimmer cam lever (6) by hand in the direction of the arrow to check that the bobbin presser (2) presses the bobbin firmly before the lower thread retainer (7) starts to hold the lower thread. Note: If this timing is reversed, it will cause problems such as an excess trailing length of upper thread. HE-800B...
  • Page 116: Adjusting The Thread Breakage Detector

    7. When the thread guide (3) is moved to position B and then released, check that it moves smoothly back to position A. 8. If the thread guide (3) does not move smoothly, check that the clearance between the thread breakage detection lever (2) and the arm is 0.1 - 0.5 mm. HE-800B...
  • Page 117: Adjusting The Thread Tension At The Tack Tension Control

    2. Loosen the set screw (1), and then move the tension stud bracket assembly (2) in and out to adjust so that the tension disc opening amount is 0.5 - 1.0 mm. 3. Check that the tension discs are fully closed when the power is turned off. 0745D HE-800B...
  • Page 118: Adjusting The Upper Thread Feeding Amount

    * Furthermore fine adjustments can then be made using the rotary hook joint screw (4). * If the lubrication amount has been reduced, run the machine for 200 - 300 sewing cycles and then check it again. Note: If lubrication stops, it will cause problems such as rotary hook seizure and thread breakages. HE-800B...
  • Page 119: Adjusting The Upper Shaft Motor Reference Position

    To exit without confirming the reference position, press the TEST key. • The display will return to the normal display and the sewing machine will change to home position standby. 0823D HE-800B...
  • Page 120: Standard Settings For Treadle Depression Stroke

    ENTER key. 0827D End the settings. “SUCCESSFUL COMPLETION” will be displayed on the screen. NOTE: If the operation of the treadle is incorrect, a buzzer will sound. Repeat the operation from step 2. 0828D Turn off the power switch. HE-800B...
  • Page 121: Installing The 3-pedal Foot Switch (option)

    4. Close the cord presser plate (5) in the direction of the arrow, and secure it by tightening the two screws (6). NOTE: ・ Make sure that the ground connections are secure in order to ensure safety. ・ Close the cord presser plate (5) securely so that no foreign objects, insects or small animals can get inside the control box. HE-800B...
  • Page 122: Electric Mechanism

    In such a case, be careful not to touch any place other than that for the measurement. In addition, always keep in mind that a high voltage remains for about 5 minutes after power is turned off. Injury When separating or rejoining connectors, and measuring something, be careful not to cut your fingers on metal parts such as heat sinks and covers. HE-800B...
  • Page 123: Components Inside And Outside The Control Box And In The Operation Panel

    Eliminates electrical noise that is transmitted along the power supply line. Panel PCB Secured inside the operation panel. This PCB controls indications of the machine status and the input operation Control box Operation panel Main PCB Motor PCB Panel PCB Cutter PCB Transformer box Power PCB NF box 0765D HE-800B...
  • Page 124: Fuse Explanation

    If a component on a PCB is damaged, the fuses may blow again soon even after they have been replaced. Part name Part code When a fuse has blown G Fuse 10A-250V The power indicator is not illuminated, and J04417-001 (glass tube fuse, 10A-250V) nothing operates. Motor PCB 2930B HE-800B...
  • Page 125: Connectors

    9-4-1. Connector positions Main PCB 0830D Motor PCB (Refer to the diagram in “9-3. Fuse explanation”.) HE-800B...
  • Page 126 9. ELECTRIC MECHANISM Power PCB 0831D Cutter PCB 0768D LCD panel PCB 0769D HE-800B...
  • Page 127: Contact Failure

    • Error E210 is displayed. 0834D • The feed mechanism moves back and forth but does not detect the home position correctly. • Problem with feed plate operation. • [E210] or [E211] is displayed. 0835D HE-800B...
  • Page 128 • Tension release does not operate (no error displayed). 0838D Cutter mechanism Problem Connector No. and position • Error E650 is displayed when the power is turned on. 0839D • Cutter does not operate. • [E651] is displayed. 0840D HE-800B...
  • Page 129 Connector No. and position • The power indicator is not illuminated, and nothing operates. • Machine operation is unstable. • [E130] or [E131] is displayed. 0841D • The main shaft motor does not operate correctly. • Error E130 is displayed. 0842D HE-800B...
  • Page 130 • After the power is turned on, [E015] or [E016] is displayed. 0843D • Error E055 is displayed after the power is turned on. 0844D • Error E452 is displayed after the power is turned on. 0845D (Continued on next page.) HE-800B...
  • Page 131 • Only the power indicator illuminates. • Nothing appears on the operation panel display. 2949B • The sewing machine does not operate when the foot switch is depressed. • Error E130 is displayed. 0848D • Error E131 is displayed. 0849D HE-800B...
  • Page 132: Troubleshooting

    Symbols and their meanings Set-up operation Switch operation condition procedure Yes-or-no follow continues on the decision-making process next page The error status number in the first column of the Turning-off table of “9-5-2. Problem power switch solution and measures” 2707B 0850D HE-800B...
  • Page 133 9. ELECTRIC MECHANISM 0851D HE-800B...
  • Page 134 9. ELECTRIC MECHANISM 0852D HE-800B...
  • Page 135 9. ELECTRIC MECHANISM 0853D HE-800B...
  • Page 136: Problem Solution And Measures

    1. While the power is turned off, check each connector is securely plugged in by referring to “9-4. Connectors”. 2. Find the error status number in the troubleshooting flowchart. 3. From the applicable part of the flowchart, take the reference number to find the correspondingly numbered details of the problem in the following table. HE-800B...
  • Page 137 LD2 (red) on the power PCB. OK if illuminated. After checking, turn off the power switch, wait for one minute or more, and then insert P1 into the main PCB and P4 and P6 into the motor PCB. (Continued on next page.) HE-800B...
  • Page 138 1 and 4 of P4. OK if approximately 24 V DC. 2713B 10. Malfunction of operation panel Check that connector P3 (PANEL) of the motor Operation panel assembly PCB is inserted. LCD panel PCB assembly Panel harness HE-800B...
  • Page 139 P2 (MAIN) is connected to the motor PCB. d. Check that connector (PANEL) connected to the motor PCB, and that connector P4 (MAIN) is connected to the panel PCB. e. Check if there is a broken wire in the harness. (Continued on next page.) HE-800B...
  • Page 140 Panel harness 2. Poor harness connection Refer to inspections 9 and 10 in #1. 3. Malfunction of PCB Check all of the LEDs while referring to step 1 in #1, and then refer to inspections 5 to 8 in #1 HE-800B...
  • Page 141 3-4 of connector P15 (PEDAL) of the main PCB. (Check between pins 5-6 if using a 3-pedal foot switch.) (Touch the ohmmeter against the lead wires without disconnecting the connector.) OK if the resistance is normally ∞ ohms but 0 ohms when depressed. 2716B HE-800B...
  • Page 142 “3-7. Input checking method”. of the motor PCB. OK if the signal turns on and off. b. If step a. (above) is OK, there is a malfunction Motor PCB assembly 800B of the motor PCB. HE-800B...
  • Page 143 1-2 and 3-4 of the cord connector. cord. OK if 2-3 ohms. b. If step a. (above) is OK, there is a malfunction Main PCB assembly 800B of the main PCB. 2719B HE-800B...
  • Page 144 1-2 and 3-4 of the cord connector. cord. OK if 2-3 ohms. b. If step a. (above) is OK, there is a malfunction Main PCB assembly 800B of the main PCB. 2721B HE-800B...
  • Page 145 1-2 and 3-4 of the cord connector. the pulse motor and cord. OK if 2-3 ohms. b. If step a. (above) is OK, there is a malfunction Main PCB assembly 800B of the main PCB. 2723B HE-800B...
  • Page 146 Error status #13 The feed mechanism does not move slowly one stitch at a time during test feeding. Probable causes Check/ repair/ adjust Parts to be replaced 1. Malfunction of foot switch and cord See #4. 2. Malfunction of feed mechanism See #7. HE-800B...
  • Page 147 OK if ∞ ohms. With main PCB connector P3 (SOL2) connected, turn on the power and carry out sewing, and measure the voltage between pins 1-2 of connector P3 (SOL2). OK if there is voltage output momentarily after sewing stops. 0651D HE-800B...
  • Page 148 2) If the area around the motor is warm, turn the pulley by hand and check that it is not stiff. If it is stiff, adjust while referring to “6-8. Upper shaft and tension pulley mechanisms”. If it is not stiff, there is a malfunction of the machine motor. HE-800B...
  • Page 149 Insert connector P2 (SOL) into the cutter PCB, turn on the power switch and carry out sewing, and measure the voltages between terminals 1 and 3 and terminals 2 and 4 of connector P2. OK if voltage is output momentarily at the sewing end. 0781D HE-800B...
  • Page 150 (Carry out 16-sector formatting.) 3. Malfunction of SD card Use a PC to check if the contents of the SD card can be read. 4. Malfunction of operation panel See #12. LCD panel PCB assembly Panel harness HE-800B...
  • Page 151: Table Of Error Codes

    Turn off the power, and then check that connector P12 on E045 connection is faulty. the motor P.C. board is properly connected. (Connector (Work clamp lifter switch if a triple pedal is P15 on the main P.C. board if a triple pedal is being used) being used) HE-800B...
  • Page 152 P11 on the motor P.C. board are properly connected. Turn off the power, and then check that synchronizer E131 Synchronizer is not connected correctly. connector P11 on the motor P.C. board is properly connected. HE-800B...
  • Page 153 Work clamp motor stopped due to a Turn off the power, and then move the work clamp up and E301 down and check that it moves smoothly. problem. HE-800B...
  • Page 154 P16 on the main P.C. board is properly connected. E453 Problem with machine head memory. Turn the power off and then back on again. [P.C. board and connector positions] <Control box> <Operation panel> Main P.C. board Motor P.C. board Panel P.C. board 4887M 4888M HE-800B...
  • Page 155 Turn off the power, and then check if there are any E710 motor. problems with the upper shaft motor. Turn off the power, and then check if there are any E711 Abnormal current detected in pulse motor. problems with the pulse motor. HE-800B...
  • Page 156 E887 program. control box which are to have their firmware versions updated. 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. HE-800B...
  • Page 157: Troubleshooting

    Loosen the thread take-up spring tension or lower the Thread take-up spring Thread take-up spring INSTRUCTION height to such a degree that does not cause double tension and height MANUAL CD hooking. Adjust it while checking bar tacking stitches. (Continued on next page) HE-800B...
  • Page 158: Skipped Stitches

    Polish with buff or replace the part. bobbin case bent * Use the HE-800B bobbin case. – bobbin holder spring, etc. 11-2. Skipped stitches Items with a “*” in the “Page” column should only be handled by a qualified technician.
  • Page 159 ・Replace with short work clamp that matches the means that material is not – sewing length. being clamped. ・Use the accessory auxiliary sheet. ・Process the work clamp assembly to match the joint – section. (Attach or remove rubber.) HE-800B...
  • Page 160: Uneven Seams (1)

    * Adjust lower thread retainer so that a 35 - 40 mm thread leader is left after trimming. 35 – 40 mm 4002Q Bobbin presser position Adjust the bobbin presser position. Bobbin insertion Insert the bobbin correctly. INSTRUCTION MANUAL CD HE-800B...
  • Page 161: Uneven Seams (2)

    Apply grease to the inclined face of the opening cam. operation Upper thread feeding Thread take-up amount Loosen the screw to decrease thread take-up amount so that upper thread does not pull out of trimmer assembly at the sewing start. Screw Increase Decrease 4000Q HE-800B...
  • Page 162: Uneven Seams (4)

    11-9. Uneven seams (7) …… Loose thread end at end backtack Cause Check Remedy Page Backtack shape Checking the number of Adjust the setting values for parameter numbers 51 end backtack stitches and 52. INSTRUCTION MANUAL CD Checking the end backtack width HE-800B...
  • Page 163: Uneven Seams (8)

    * Setting the vector shape to a rectangle can be MANUAL CD effective when the width is less than the bar tack width. Needle plate Needle plate ・When using knit material, replace with the -3 needle plate. – ・Replace with a needle plate with a smaller needle hole. HE-800B...
  • Page 164: Uneven Seams (10)

    MANUAL CD Bobbin case Damaged outside Polish with buff or replace the part. bobbin case bent * Use the HE-800B bobbin case. – bobbin holder spring, etc. Stitch patterns Purl stitch, whip stitch Set using parameter number 53. INSTRUCTION MANUAL CD...
  • Page 165: Upper Thread Run Out

    Cotton yarn #60 – Holding force approx. 2N 4006Q Opening cam position Adjust the position so that the trimmer does not touch the opening cam when the work clamp is lowered. Approx. 0.5 mm 4107M (Continued on next page) HE-800B...
  • Page 166 Use parameter numbers 10 to 13 to set the number of INSTRUCTION stitches and the speed for slow starting. MANUAL CD Bar tack thread Bar tack thread tension is Make the bar tack tension as weak as possible. INSTRUCTION tension too strong. MANUAL CD HE-800B...
  • Page 167: Unraveling Of Thread Trimmed By Upper Thread Trimmer Assembly

    (particularly ・ Adjust the bar tack tension discs opening amount to zigzag tension discs) 0.5 - 1.0 mm by removing the top cover and moving the tension release cam. Zigzag tension Tack tension 0.5 - 1 mm 4008Q HE-800B...
  • Page 168: Upper Thread Miss-trimming

    ・Bend the trimmer U or replace them so that the correct force is applied. ・Repair any damage from striking the needle. Cotton yarn #60 – Holding force approx. 2N 4006Q Trimmer driving arm Upper thread trimmer Adjust the position of the trimmer driving arm roller. cutting depth HE-800B...
  • Page 169: Needle Strikes Upper Thread Trimmer

    THREAD key to lower the work clamp, and then adjust the distance between the upper thread trimmer and the center of the needle to 5.5 - 6.0 mm. – 5.5 - 6.0 mm 4012Q (Continued on next page) HE-800B...
  • Page 170: Needle Breakage

    Install the cutter so that the clearance between the bar and cutter needle bar and the cutter is 0.3 mm. * The cutter release section of the needle bar should be at a right angle to the cutter. 0.3 mm 4016Q HE-800B...
  • Page 171: Imperfect Cutter Function (imperfect Material Cutting)

    If blade is worn or chipped, sharpen it or replace it. – Sticks in material Needle plate Replace with the special needle plate (optional). INSTRUCTION MANUAL CD Cutter bar guide Smoothness cutter Adjust the cutter bar guide so that the cutter operates operation smoothly with no play. HE-800B...
  • Page 172: Cutter And Upper Thread Trimmer Touch

    MANUAL CD cutter X position. Cutter Cutter play Adjust the cutter bar guide so that the cutter operates smoothly with no play. Cutter knife bending Use the cutter holder (option) to prevent the cutter knife from becoming bent. 4019Q HE-800B...
  • Page 173: Upper Thread Miss-winding

    Cord connection Check if there are any problems with the connection INSTRUCTION and contacts of work clamp motor connector P23 on MANUAL CD the main P.C. board. Work clamp motor drive Check if the drive gear screw is loose. gear HE-800B...
  • Page 174: Work Clamp Is Not Raised (2)

    ・ Buff this section A to reduce the thread retaining resistance. 4023Q Upper thread trimmer Upper thread trimmer Carry out opening timing adjustment for the upper operation thread trimmer. Presser lifter home Presser lifter home position Adjust the presser lifter home position. position HE-800B...
  • Page 175: Lower Thread Is Not Trimmed (pulls When Material Is Removed)

    * If the feed mechanism operates when the cam has not opened the stop plate, the cutter will bump against the upper thread trimmer. 4018Q Feed home position Feed home position Adjust the feed home position. Feed timing belt Feed timing belt tension Adjust the feed timing belt. HE-800B...
  • Page 176: Needle Does Not Zigzag Or Noise Occurs When Needle Zigzags

    P5 on the main P.C. board. INSTRUCTION ・ Check if there are any problems with the MANUAL CD connection and contacts of connector P2 and operation panel connector P3 on the motor P.C. board. HE-800B...
  • Page 177 MEMO HE-800B...
  • Page 178 SERVICE MANUAL HE-800B © 2014 Brother Industries, Ltd. All Rights Reserved. I3061003D 2014.03. D (1)

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