Bernina 780 Service And Maintenance Manual
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Bernina 780 Service And Maintenance Manual

Bernina 780 Service And Maintenance Manual

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Service- and Maintenance Manual
BERNINA 780
BERNINA 750 QE
BERNINA 710
BERNINA International AG
Seestrasse 161
CH-8266 Steckborn
Switzerland
Page 1 von 172

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  • Page 1 Service- and Maintenance Manual BERNINA 780 BERNINA 750 QE BERNINA 710 BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 1 von 172...

  • Page 2: Table Of Contents

    2.16 PCBA-Presser-Foot Height Sensor ..................... 23 2.17 Sensor Support ABC (Presser Foot Recognition) ................24 2.18 Cable Harness ............................. 25 2.19 BERNINA 780 Block Diagram (B750 / B710)..................26 2.20 Handling of Electronic Components ....................27 2.20.1 Returning Defective Electronic Components................27 2.20.2 Repairs of Electronic Components (PCBA's) ................
  • Page 3 3.2.17 PCBA-Dual Feed Sensor ......................49 3.2.18 PCBA-Accessories-Interface ....................... 49 3.2.19 Embroidery Module Interface (BERNINA 780 and 750) .............. 50 3.2.20 PCBA-Lower-Thread-Sensor ....................... 51 3.3 Mechanical Components ........................52 3.3.1 Hook And Hook Driver ........................52 3.3.2 Thread-Cutter Unit ......................... 55 3.3.3 Thread-Tension Unit ........................
  • Page 4 1b Machine Soft- and Firmware Data ....................109 1c Machine Operating Time Data ......................110 1d Machine Stitch Counter Data ......................110 1e BSR (BERNINA Stitch Regulator) Data ................... 110 1f Machine Servicing Data ........................111 1g Saving / Loading Customer Data ..................... 112 1h Customer Data ..........................
  • Page 5 8.5.1 Measures to be taken before the Maintenance ................168 8.5.2 Measures to be taken after the Service ..................168 8.5.3 Functional Check ......................... 169 8.5.4 Maintenance Checklist BERNINA 780 / 750 / 710............... 170 8.5.5 Embroidery Module ........................171 Document Revision History ..................172...

  • Page 6: Chapter 1 - General Information

    This service manual is only available in electronic format. It can be downloaded from BERNINA Infogate at http://infogate.bernina.com under 'Service Manual' in the 'Tech. Service' register. If you don't have access to Infogate, contact your local BERNINA importer. They'll be glad to be of assistance.

  • Page 7: Warning: Dangerous Voltage Levels

    The capacitors require 30 seconds to discharge after the power supply has been switched off. We recommend waiting for the complete discharging of the capacitors before starting any servicing work on the PCBs. Caution! High voltage BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 7 von 172...

  • Page 8: Esd-Related Note: Electrostatic Discharge (Esd)

    4. Only use conductive ESD-capable plastic/foil pouches and ESD transport boxes for dispatching electronic components – even if the components might be faulty. Electrostaticdischarge_ESD 5. To prevent consequential damage or harm, treat faulty PCBs in the same manner as new ones. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland...

  • Page 9: Tools And Gauges

    1.4 Tools and gauges Commercially available (not available from BERNINA): Vernier caliper, multimeter, TORX screwdriver no. 6, 8, 10 and 10 with 200mm blade length; 15, 20 and 20 with 200mm blade length, 25, and angular TORX nos. 6 and 10, 10mm ring wrench, 6mm flat wrench.
  • Page 10 Checking amount of bobbin fill 033958.50.00 (for 1.5) C-clip holder set 033958.50.01 3-teilig, Ø1.5, 2.3, 3.2 Assembly C-clips (for 2.3) (to order as soon as 033958.50.02 available! (for 3.2) BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 10 von 172...
  • Page 11 • Voltage tests 398022030 Feeler gauge 0.3mm Distance measurements 398111030 Feeler gauge 0.15mm Usual in trade Feeler gauge 0.6mm Adjusting tool for feed-dog 007993.50.00 Angular torx 8 height at back BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 11 von 172...
  • Page 12 Allows for more precise Commercially magnifier 2.5x adjustments in the hook-/needle available (magnification area approx. 4x) Gauging thread DMC Setting of the upper- and lower- 652010.20.++ 50 in white thread tension BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 12 von 172...

  • Page 13: Handling Adjustments

    1.6 Abbreviations / Names used Throughout the whole manual the following abbreviations have been used. We have reserved the right not to explain individual abbreviations within the text. Abbreviation: Stands for: BERNINA Dual Feed BERNINA Stitch Regulator Direct Current EMBroidery Free Hand System...
  • Page 14 Toothed belt drive and motor pulley. • Hook drive mechanism. • Dual and sideways motion feed transmission. Area of electronics: • All sensors / light barriers / switches / electronic group of parts. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 14 von 172...

  • Page 15: Technical Details By Model

    DC / 36 Volt Stitching speed, min./max. 100 - 1000 SPM 100 - 1000 SPM 100 - 1000SPM Sideways Motion BERNINA Dual Feed (BDF) BERNINA Stitch Regulator (BSR) connector Embroidery module connector Automatic thread cutter Embroidery speed, max. 1000 SPM...

  • Page 16: Chapter 2 - Electronics And Wiring

    PCBA-front-cover, right X-2111 black sideways-motion motor white PCBA-module X-42 blue stitch-length motor X-24 white PCBA-detection X-42 X-15 white embroidery module X-40 black PCBA-lower-thread sensor X-24 X-15 EEPROM X-40 BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 16 von 172...

  • Page 17: Pcba-Cpu-Module (Arm9) - General Information

    CPU-module from the 'old' PCBA and add to the • Data new. Connectors • According to picture 2.2.1 PCBA-CPU-Module / ARM9 (B780, B750, B710) X-1 PCBA-Base X-28 TFT screen Contacts of PCBA-Base BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 17 von 172...

  • Page 18: Pcba

    • According to picture Task • Manual control of sewing speed • Registering of signals for: Needle up/down (S-1) only 780 Seam securing (S-2) Pattern end (S-3) Pattern begin (S-4) only 780 • Connecting PCBA left front cover with PCBA-RET and PCBA right front cover.

  • Page 19: Pcba Right Front Cover (B710, B750, B780)

    (S-3) and right needle Key-function foil position (S-4). PCBA-Base • Supply for LCD backlighting connector • Supply for LED freearm lighting Touch screen connector LCD backlighting connector BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 19 von 172...

  • Page 20: Pcba-Power (B710, B750, B780)

    The cause must be identified and removed. Only a replacement fuse of the correct rating must be used. It is essential to test the functions on replacing the fuse. BERNINA International AG Seestrasse 161...

  • Page 21: Pcba-Threader (B710, B750, B780)

    The hook track signal (light barrier 3) together with the initializing signal defines the moment at which the hook may swing out or in, depending on the position of the needle bar on switching the machine on. This is essential to avoid collision with the needle. BERNINA International AG Seestrasse 161 CH-8266 Steckborn...

  • Page 22: Pcba-Ret (B780, B750, B710)

    2.1.13 PCBA Feed-Dog Drop Detection (B780, B750, B710) The PCBA-detection contains: • Light barrier • Connector Connecting • According to picture Task • Reporting feed-dog status (up/lowered) to CPU via PCBA-base BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 22 von 172...

  • Page 23: Pcba-Lower-Thread Sensor

    The upper and lower position of the presser foot bar is recognized via light barriers and the presser foot pressure via the hall sensor and the magnetic strip. Light barrier Hall sensor BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 23 von 172...

  • Page 24: Sensor Support Abc (Presser Foot Recognition)

    The ABC sensors support contains: • harness Infrared (IR) LED's • Photo transistors Connecting • According to picture Task • Recognition of presser feet and buttonhole foot signal via Sensors sensors. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 24 von 172...

  • Page 25: Cable Harness

    6 Accessories connector white X 38 / / PCBA-Base 7 Dual Feed sensor white X 38 / / PCBA-Base 8 ABC sensor support white X 38 / / PCBA-Base BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 25 von 172...

  • Page 26: Bernina 780 Block Diagram (B750 / B710)

    2.19 BERNINA 780 Block Diagram (B750 / B710) BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 26 von 172...

  • Page 27: Handling Of Electronic Components

    Electronic components that have been manipulated or repaired by oneself are excluded from the repair/replacement process. They will be disposed of. BERNINA International AG reserves the right to charge the original price (of the new component) for electronic components that have been manipulated, repaired by oneself or improperly packaged.

  • Page 28: Chapter 3 - Removal And Refitting Of Components

    • Press cover down into the locks. • Refit screw b (T20 M4x66). • Refit and retighten the 4 screws a (T20 M4x16). • Retighten screw b (T20 M4x66). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 28 von 172...

  • Page 29: Front Cover

    • Rehook front cover at top, taking care not to pinch any cables in the duct. • Insert cover bottom into base plate, ensuring that the belt cover latches sit properly. • Refit and retighten screws c. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 29 von 172...

  • Page 30: Free Arm Cover

    • Slide casing back under freearm, taking care not to catch the lower-thread sensor cable. • Refit screw a (T20 M4x16). • Refit and retighten 2 screws b (T15). • Retighten screw a (T20 M4x16). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland...

  • Page 31: Free Arm Cover Plate

    • Refit base casing and bobbin door. Warning! Take care not to interfere with the lower-thread sensor wires to avoid damaging them. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 31 von 172...

  • Page 32: Base-Plate Cover

    • Refit and retighten 3 screws b (T10 3x10). • Retighten screw a (T10 3x10 and u-washer 3.3x7.0.8). Warning! Take care not to interfere with the lower-thread sensor wires to avoid damaging them. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland...

  • Page 33: Belt Cover

    • Secure belt cover with 2 screws a (T10) on fixing plate. • Tilt sewing machine to refit and tighten fastening screw b (T20) on the base plate underside. • Refit handwheel 1 to main shaft. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 33 von 172...

  • Page 34: Electronics And Sensors

    Note: Take care not to interfere with the SSU plastic pin. • Reconnect front left PCBA-Cover/front right PCBA-Cover ribbon cable properly. • Replug PCBA-RET/front left PCBA-Cover properly. • Refit the covers (see 3.1). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 34 von 172...

  • Page 35: Stitch-Length And Stitch-Width Adjusting Knobs

    • Tigthen the right screw (T20) to fasten the winder carrier, taking care that the bobbin pin doesn't touch the cover. • Rewind the winder wires around the wire harness. Then reconnect the PCBA-Base plug. • Refit the covers (see 3.1). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 35 von 172...

  • Page 36: Winder Motor

    • Refit microswitch on the lugs and secure with the fastening screw (T6). • Refit cable duct strap, taking care that the wires can still be moved. • Refit complete winder unit (see 3.2.3). • Refit the covers (see 3.1). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 36 von 172...

  • Page 37: Lc Display / Touchscreen

    • Stick self-adhesive copper foil tape over the severed copper foil to bridge the cut. • Refit front right and front left PCBA-Cover to front cover (see 3.2.1). • Refit the covers (see 3.1). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 37 von 172...

  • Page 38: Pcba-Ret / Rubber Key Pad / Ribbon Cable

    • Bring PCBA-RET and bridge into correct position and tighten fastening screws to secure. • Reconnect PCBA-RET ribbon cable to front left PCBA- Cover. • Refit the covers (see 3.1). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 38 von 172...

  • Page 39: Pcba-Base

    • Reconnect all plugs (note the color coding, see next page). Note: Ensure that no wires are within the FHS light barrier area 3. Important! Is the EEPROM attached? BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 39 von 172...
  • Page 40 PCBA-lower-thread sensor X-103 black wireless module * For connector details see 2.18 cable harness X-1701 X-1503 X-1700 1702 X-17 X-3112 X-38 X-3111 X-30 X-2111 X-42 X-24 X-15 EEPROM X-40 BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 40 von 172...

  • Page 41: Pcba-Cpu-Module

    The current state of the firmware must be checked after assembly of the new PCBA-CPU- module. If it is not the latest version, the firmware must be updated (via updating procedure). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 41 von 172...

  • Page 42: Eeprom (Electrically Erasable Programmable Read-Only Memory)

    • Attach EEPROM 2 to base. • Take care to fit EEPROM in the correct position (markings must match) and avoid bending the contacts. EEPROM fitting position Markings must match. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 42 von 172...

  • Page 43: Freearm Led Sewing Light

    • Remove freearm LED sewing light from front cover. Assembly: • Slide freearm LED sewing light into front cover. • Replug freearm LED sewing light on front right PCBA-Cover. • Refit the covers (see 3.1). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 43 von 172...

  • Page 44: Pcba-Power Including Pcba Housing

    • Refit PCBA cover, PCBA housing and air duct, taking care not to interfere with the main switch and power supply plug. • Refit the covers (see 3.1). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 44 von 172...

  • Page 45: Pcba-Power

    1. • Tighten the 3 fastening screws a (T10) to secure PCBA-Power in the housing. • Refit PCBA-Power and housing (see 3.2.11). • Refit the covers (see 3.1). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 45 von 172...

  • Page 46: Head Frame Led Sewing Light

    • Fit the left LED sewing light into the socket a and use small screwdriver (T10) 030475.50.00 to tighten the fastening screw 1. • Refit the covers (see 3.1). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 46 von 172...

  • Page 47: Presser-Foot Height Sensor

    1.6mm. • Retighten screw 3. • Reconnect plug 1. • Refit covers. max 1.6mm BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 47 von 172...

  • Page 48: Pcba-Threader

    Caution: Risk of Breakage! Take care that sensor support 2 doesn't catch edges while fitting it. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland...

  • Page 49: Pcba-Dual Feed Sensor

    • Remove 2 screws a (T10 M3x6). Tip: For access to screws see film. • Remove PCBA-Accessories-Interface 1. • Disconnect plug 2. Assembly: • Lower dual feed. • Position PCBA-Accessories-Interface 1. • Retighten 2 screws a. • Refit covers. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 49 von 172...

  • Page 50: Embroidery Module Interface (Bernina 780 And 750)

    3.2.19 Embroidery Module Interface (BERNINA 780 and 750) Disassembly: • Remove base plate cover (see 3.1.6). • Remove PCBA-EMB connector a. • Remove the two collar screws 1 (T8) using the angled torx. • Disconnect PCBA-EMB plug b. • Remove insulation foil c.

  • Page 51: Pcba-Lower-Thread-Sensor

    • Insert guiding pin on the left of the lower thread sensor into guiding rail. • Click lower thread sensor into place on hook race cover holder pin c. • Close bobbin door. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 51 von 172...

  • Page 52: Mechanical Components

    • Insert the setting hook including gauge shaft and fitted pressure spring into hook race ring. Then slide the 5.0mm thick end of gauge shaft through the hook race bearing up BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland...
  • Page 53 • Insert hook and close hook race cover. • Insert bobbin case. • Test run the machine. If it runs smoothly and quietly, all the fitting and adjusting work has been carried out properly. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland...
  • Page 54 Replace hook if it is badly scratched or has broken hook tips. • For lubrication of hook refer to lubrication diagram (see BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 54 von 172...

  • Page 55: Thread-Cutter Unit

    • When servicing the machine, the thread cutter must always be removed for cleaning purposes. • The blade is a wear part and therefore available as an individual part. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 55 von 172...

  • Page 56: Thread-Tension Unit

    The clutch gear must still be movable smoothly and without clamping on the shaft. • Adjusting is carried out via the Service Program (see 6j). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 56 von 172...

  • Page 57: Clutch Carriage

    • Reposition pull solenoid cable properly, replug plug a and refit clamp 3. • Refit the connecting strap between clutch carriage and cutting unit release lever 2 (2 X T10) BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 57 von 172...
  • Page 58 With the lever in this position, retighten the two screws (T10) on the connecting strap between clutch carriage and cutting unit release lever. • Rehook tension spring 1. • Refit sideways-motion stepping motor carrier (see 3.3.18). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 58 von 172...

  • Page 59: Threader Head

    • Push threader head c onto threader bar in correct position. • Release needle threader holder b. • Insert needle. • Functional check • Adjust threader if necessary (see 4.9). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 59 von 172...

  • Page 60: Needle Bar Support

    7. • Slide needle bar support 12 to front, then to the left and out of thread take-up crank. • Remove seating 13 that sits behind needle bar support. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 60 von 172...
  • Page 61 • Refit zigzag support with screw f and spring 8. • Rehook spring 8. • Remove pinning tool 14. • Adjust needle distribution (see 4.4.2). • Refit covers. build-in BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 61 von 172...

  • Page 62: Needle Bar

    • Rough-set the needle bar guide and secure the setscrew b (T6 M3x4). • Rehook spring 1. • Refit needle bar support (see 3.3.7). • Adjust threader (see 4.9). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 62 von 172...

  • Page 63: Needle Clamp

    • Use feeler gauge 8 to press spring 3 down, then slide needle clamp 5 over needle bar 7 in direction of arrow as indicated. • Retighten needle positioning pin b. • Refit needle clamp screw a. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland...

  • Page 64: Threader Mechanism

    • Reposition dowel 8 so that pressure spring sit’s in the groove of the dowel (see picture a). • Rehook tension spring 10. • Rehook tension spring 9. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 64 von 172...

  • Page 65: Main Motor

    • Position motor back into motor bracket. • Retighten screw a including u-washer and serrated washer. • Refit drive belt and ventilation fan. • Adjust belt tension (see 4.1.2). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 65 von 172...

  • Page 66: Dual Feed

    3. • Reconnect all plugs, lay cable in duct and close. • Refit right LED housing. • Adjust dual feed in X-direction (see 4.6.2). • Refit covers. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 66 von 172...

  • Page 67: Thread Take-Up

    • Refit link shaft 4 with bushing support and screw a. • Retighten setscrew b on the surface of crank 5 so that there is no play or clamping. • Refit needle bar support, thread tension unit and covers. BERNINA International AG Seestrasse 161 CH-8266 Steckborn...

  • Page 68: Restraint Guided Advance Link Lever

    • Loosen screw 9 (T8) of bearing pin, then remove bearing pin. • Pull lift-/advance 16 link out, pulling it away from yourself and taking care not to lose the pressure spring. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 68 von 172...
  • Page 69 734562.50.00. • Refit circlip 8. • Turn handwheel and check for ease of running. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 69 von 172...

  • Page 70: Stitch-Length Crankshaft

    • Slightly push small belt pulley and white plastic washer against circlip and retighten setscrew b (T8). • Adjust mechanical basic setting (balance) of feed-dog (see 4.6.3 service program • Refit the covers (see 3.1). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 70 von 172...

  • Page 71: Base Shaft

    • Use 3.0mm pinning tool 007937.5.00 to pin base shaft against lift cam. • Slide drive belt over belt pulley. Check belt tension (see 4.1.1). • Check loop lift (see 4.5.3). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 71 von 172...

  • Page 72: Stitch-Length Stepping Motor

    • Place 0.3mm feeler gauge 9 under stop 7 of drive gear pinion 6. • Set stop 7 of drive gear pinion 6 against rubber buffer 8 and retighten setscrew b. • Remove feeler gauge 9. • Refit stepping motor. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 72 von 172...

  • Page 73: Sideways-Motion Stepping Motor (B780)

    1 until lever 5 sits opposite of guiding 7 without play or pressure. • Retighten screw a. • Main feed-dog: Adjust position within stitch plate in X direction (see 4.6.1) BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 73 von 172...

  • Page 74: Presser-Foot Pressure Stepping Motor

    • Refit front head plate 2 and screws a and b. • Refit needle bar support. • Refit front cover, start Service Program and carry out (test 6h). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 74 von 172...

  • Page 75: Stitch-Width Stepping Motor

    8. • Retighten setscrew c. • Complete test • Remove pinning tool 6 and feeler gauge 7. • Adjust needle distribution (see 4.4.2). • Refit covers BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 75 von 172...

  • Page 76: Presser-Foot Pressure - Toothed Rack Bearing

    • Position entire toothed rack bearing at rear head plate and retighten three screws a. • Slide pinion 5 over shaft. • Refit wheel 3 including washer and circlip 4. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 76 von 172...

  • Page 77: Chapter 4 - Settings

    For servicing, we recommend that you always use the accessories included with the machine or purchased specifically for it. These are the following: power cable, foot control, buttonhole foot, embroidery module and hoop, BSR foot, and other accessories. BERNINA International AG Seestrasse 161 CH-8266 Steckborn...

  • Page 78: Belt Tensions

    • Untigthen screw b (T20), then use adjusting spanner # 733019.70.00 to turn the bearing until the specified tension value has been reached. • Retighten screw b. Note: Clockwise turning: belt tension tightens. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 78 von 172...

  • Page 79: Drive Motor

    4.2.1 Position of Head-Frame Plate/Stitch Plate in Y Direction Check Adjustment Check: • 18mm rough setting (picture 4.2.1) between frame and head plate. 4.2.1 Disconnect PCBA-Threader Sensor to clear access to the screw. 18mm BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 79 von 172...

  • Page 80: Position Of Head Frame Plate/Stitch Plate In X-Direction

    • Ensure that presser foot and stitch plate are parallel. • Retighten screw b. Note: The presser foot height is read by the PCBA-Dual feed sensor and does therefore not require mechnical adjustment as with previous models. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland...

  • Page 81: Presser-Foot Fixation

    • Ensure that presser foot sole and stitch plate are parallel - align if required. • Use 3/8' markings on stitch plate for reference. • Retighten screw c. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 81 von 172...

  • Page 82: Needle Adjustment

    The adjusting screw g must only be used for the parallel setting of the needle bar and presser foot bar. It mustn't be used for the setting of the needle/hook distance! Setting of needle/hook distance (see 4.5.4). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 82 von 172...

  • Page 83: Needle Distribution

    • Retighten screw b. Test: • Attach presser foot 1D. • Set to maximum stitch width. • Needle mustn't touch the right or left side of the stitch plate. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 83 von 172...

  • Page 84: Zigzag Stitch Width Limiter

    • Needle bar support mustn't touch the zigzag stitch width limiter a (picture 4.4.3 4.4.3). Adjustment: • Loosen screw b (T10). • Position limiter a. • Retighten screw b. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 84 von 172...

  • Page 85: Hook, Needle Drive And Feed-Dog Movement Synchronization

    3.0mm pinning tool 007937.50.00. • Retighten first screw d (T10) on belt pulley. • Remove gauges. • Retighten second screw d (T10) on main shaft belt pulley in rotating direction. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 85 von 172...

  • Page 86: Loop Lift

    (no play, no clamping). • Use gauge to remove clamp. • Retighten second screw in rotating direction. • Check again and repeat setting if required. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 86 von 172...

  • Page 87: Needle / Hook Distance

    A Needle 130/705H Nm 120 should, in position BDC, touch the stitch hole, but must not being pushed aside Note: We recommend to use a magnifying glass to ensure accurate setting. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 87 von 172...

  • Page 88: Needle Height

    Available size of Art.-No. Ø in mm identification (colour) 032667.50.00 1,50 black (phosphated) 032667.50.01 1,85 galvanised 032667.50.02 2,20 Nicke-plated 032667.50.03 2,55 black (phosphated) 032667.50.04 2,90 galvanised = Ø BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 88 von 172...

  • Page 89: Feed-Dog Settings

    Withoug sideways motion feeding (B750, B710) • Turn handwheel until feed-dog is switched on. • Untighten screws e (T6). • Move feed-dog into the specified position. • Retighten screws e. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 89 von 172...

  • Page 90: Dual Feed: X-Direction Positioning Against Main Feed-Dog

    Without sideways motion feeding • Untighten screw c (T10). • Use eccentric key 001361.70.00 in eccentric engagement bore d to adjust the lateral positioning. • Retighten screw c. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 90 von 172...

  • Page 91: Main Feeding Balance - Mechanical Basic Setting

    • The first tooth d of drive gear b must gear into the first gap of the toothed segment e. • Use spring pressure to reposition spherical bearing h to the left into the motor holding plate. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland...
  • Page 92 • Retighten screw g to fix drive gear b at stop c. • Remove pinning tools. • Refit PCBA-base. To fine adjust, refer to Service Program, Test BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 92 von 172...

  • Page 93: Dual Feed Balance - Basic Mechanical Setting

    Turn adjusting screw a until the distances between the drive belt flange and the adjusting hub are even. • Carry out BDF Balance fine adjustment in Service Program 6b BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 93 von 172...

  • Page 94: Main Feed-Dog Height 0.9-1.0Mm

    • Retighten screw d (T8) and check the height using gauge 398024.03.1+. • Repeat adjustment if necessary. Note: Turning clockwise > feed-dog sinks. Turning counterclockwise > feed- dog raises. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 94 von 172...

  • Page 95: Feed-Dog/Dual Feed Synchronization

    • The dual feed should lie flush against point e at Synchroplate f without play or clamping. Setting: • Loosen screw g (T10). • Move dual feed into the specified position. • Retighten screw g. • Remove Synchroplate and pinning tools. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 95 von 172...

  • Page 96: Clutch Carriage / Thread Cutter

    • With the lever in this position, retighten the two screws (T10) on the connecting strap between clutch mechanism and cutting unit release lever. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland...

  • Page 97: Thread Cutter

    Refit and rtighten screw c (T8 angled torx) and nut d (open-end or ring wrench 5) on thread guide plate/thread stop. • Carry out a manual functioning check. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 97 von 172...

  • Page 98: Synchrinising Disc

    (BDC = 0°). • Place synchronizing disc against circlip. • Retighten screw a slightly. • Remove loop lift gauge. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 98 von 172...

  • Page 99: Threader

    734101.50.00 • The threader head can be properly adjusted by moving it up, or down. • Retighten needle bar guide adjusting screw 17 (T8). Refit basting solenoid housing. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 99 von 172...

  • Page 100: Basting Device

    Loosen needle bar guide adjusting screw 17. • Center needle bar bore within clutch-bolt clearance 4. • Retighten needle bar guide adjusting screw 17 (T8). Refit basting solenoid housing. 734101.50.00 BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 100 von 172...

  • Page 101: Checking The Timing Of Disengagement

    • Run machine at highest speed to test basting magnet in left and right needle positions Note: If functional test fails in one, some or all needle positions, recheck the setting of the cushioner position and the needle bar guiding and adjust as required. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland...

  • Page 102: Thread Regulator

    Check tension: • Thread thread regulator with a 30cm long bit of thread. • Attach the two thread ends to the BERNINA tension spring scales (006038 50.00). • Slowly move the scales up. • On moving the regulator spring, the tension value must be 12 – 15 g.

  • Page 103: Thread Tension

    The machine must be switched on in order to use the Service Program. Refer to the safety instructions please. 4.12.1 Upper-Thread Tension 6j Automatic Upper Thread Tension: • Use a DMC 50 BLANC cotton thread (recommended by BERNINA, also refer to Service Info, Ref-# 18249, in Infogate) to thread the machine.

  • Page 104: Lower Thread Tension (Basic Setting)

    Note: Incorrectly or unevenly filled bobbins can affect the stitch quality and impair the functioning of the lower thread sensor. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 104 von 172...

  • Page 105: Lower-Thread Sensor Position

    Functioning check in service program menu 3 (item Correction: The position of the lower thread sensor is given and cannot be adjusted. • For removal and fitting refer to chapter 3 (item 3.3.20). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 105 von 172...

  • Page 106: Chapter 5 - Service Program

    2 = Screen Menu 3 = Sensors Menu 4 = Signals Menu 5 = Motors Menu 6 = Settings Menu 7 = Embroidery Module 11 = Check-Out (only BERNINA 780/750) BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 106 von 172...
  • Page 107 2 = Screen 3 = Sensors 4 = Signals 5 = Motors 6 = Settings 7 = Embroidery Module 11 = Check-Out (only BERNINA 780/750) BERNINA 710 1 = Service-Info 2 = Screen 3 = Sensors 4 = Signals 5 = Motors...
  • Page 108 Selecting a keyboard a: Upper case letters b: Lower case letters c: Numbers, special characters and punctuation marks d: Special marks BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 108 von 172...

  • Page 109: Menu 1 - Service Information

    Technical data (1 – 10). Note: • Using the virtual keyboard, technical data can be entered in the page. • The entered data gives the technician information on already made improvements. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 109 von 172...

  • Page 110: Machine Operating Time Data

    Total number of stitches using BSR • Total number of embroidery stitches • Stitches since last lubrication • Stitches since last service 1e BSR (BERNINA Stitch Regulator) Data What to test: The BSR foot must be attached and connected. • Serial Number • Chassis Number •...

  • Page 111: Machine Servicing Data

    Service interval • The stitch counter triggers a reminder after 3,000,000 stitches: Please take your machine to a BERNINA dealer for servicing. Important: • Remember to always reset the counter (cleaning interval) after servicing or repairing.

  • Page 112: Saving / Loading Customer Data

    BERNINA USB memory stick. • Load the Customer settings Loading of customer data to the machine. Note: Connect BERNINA USB memory stick and select required button. Remove the stick after saving of data has been confirmed. 1h Customer Data What to test: •...

  • Page 113: Dealer Data

    • Dealer data can now be entered. • Dealer data can also be read and entered in .txt format from a BERNINA USB memory stick. Important: The file must be named "dealerdata.txt" (see example below). • The dealer-related data will automatically appear on the screen when a maintenance reminder is triggered.

  • Page 114: Touchscreen Calibration

    2a Touchscreen Calibration What to test: • Touch 'Calibrate' to start the test. • To calibrate the touchscreen, use the BERNINA stylus to touch the 3 crosses as required • Touch to save and return. • Touch to close without saving.

  • Page 115: Lc Display (Screen)

    To return to menu 2, touch Repair notes: • Clean LCD and touchscreen. Attention! Never use alcohol, petrol, spirits or any corrosive fluids, or abrasive pastes or abrasive cleaners! BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 115 von 172...

  • Page 116: Rgb (Red, Green And Blue) Screen

    To return to menu 2, touch Repair notes: • Check cables for deformation and/or wear and tear. • Replace PCBA-RET if any of the buttons don’t light up. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 116 von 172...

  • Page 117: Led's And Brightness

    Check all connectors. • Check cables for deformation and/or wear and tear. • Check connectors P-38 and P-3111 on the PCBA-Base. • Replace the LED’s. • Replace the PCBA-Base. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 117 von 172...

  • Page 118: Menu 3 - Sensors (Mounting Locations In The Machine)

    Check correct positioning of PCBA Threader. The PCBA Threader is held in position with a pin and fastening screw 007752.50.34 (T10) in the needle bar support. • If the sensor doesn't respond, replace the PCBA Threader Sensor (see 3.2.15). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 118 von 172...

  • Page 119: Overlift Presser Food Switch (Presser Foot Height Sensor)

    • Check the basic setting of the presser foot height in Service program (see 6h). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 119 von 172...

  • Page 120: Lower-Thread Sensor

    Repeat the test using a new bobbin. • Check on correct position of PCBA-Lower-Thread-Sensor. (see 3.2.15) • Check cables for deformation and/or wear and tear. • Replace PCBA-Lower-Thread-Sensor (see 3.2.20). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 120 von 172...

  • Page 121: Feed Dog Drop

     Unplug PCBA-Base connector.  Replace PCBA-Detection.  Replug PCBA-Base connector.  Refit PCBA-Detection in required position and retighten fastening screw (T20).  Refit the covers (see 3.1). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 121 von 172...

  • Page 122: Dual Feed Recognition Sensor

    • If the sensor doesn't respond, replace the PCBA Dual Feed Sensor (see 3.2.17). • The support ABC sensor (presser foot recognition) might also be affected (see 3.2.16). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 122 von 172...

  • Page 123: Winder Microswitch

    The color of the bar changes from yellow to green. • Press to return to menu 3. Repair notes: • Check cables for deformation and/or wear and tear. • Replace winder • Replace PCBA-Base (see 3.2.7). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 123 von 172...

  • Page 124: Free Hand System Fhs

    • Check cables for deformation and/or wear and tear. • Check if in the area of the sensor on the PCBA-Base no cables are exposed. • Replace the sensor if it doesn't respond. BERNINA International AG Seestrasse 161 CH-8266 Steckborn...

  • Page 125: Menu 4 - Signals

    Stitch width and stitch length knob(s) b) Functions of keys and buttons on machine c) Start-/stop slide (SSU) d) Foot control e) open Upper thread sensor g) BERNINA Stitch Regulator (BSR) h) PCBA-Position Speaker USB ports k) Basting solenoid Presser foot recognition...

  • Page 126: Functions Of Keys And Buttons On Machine

    The bar will fill accordingly. • Press to return to menu 4. Repair notes: • Check cables for deformation and/or wear and tear. • Replace PCBA Left Front Cover (see 3.2.1). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 126 von 172...

  • Page 127: Foot Control

    Check if the regulator is properly hooked and if it actuates the actuating lug. • Check if the regulator spring is properly set (see 4.11). • Replace PCBA-RET (see 3.2.6). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 127 von 172...

  • Page 128: Bernina Stitch Regulator (Bsr)

    4g BERNINA Stitch Regulator (BSR) What to test: • Attach BSR foot. • Select test 4g. • Lower presser foot. • Press the icon to start the test. • Place fabric under the presser foot. • Move the fabric in different directions.

  • Page 129: Mechanical Fine-Adjustment Of Synchronization Disk

    Turn synchronizing disk until signal 1 blanks. Position: between 25° and 27,5°. • Retighten screw a (not too hard). Attention: Don't tighten screw a of synchronizing disk too tight. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 129 von 172...

  • Page 130: Speaker

    If 'Test Failed' message appears: • Repeat the test using another USB cable. • Check the client and host ports on the machine. • Replace PCBA-Base (see 3.2.7). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 130 von 172...

  • Page 131: Basting Solenoid

    Press to return to menu 4. Repair notes: • Check plugs and cables for deformation and/or wear and tear. • Replace basting solenoid. • Replace PCBA-Base (see 3.2.7). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 131 von 172...

  • Page 132: Presser-Foot Recognition

    1C, 20C, 40C 5.5mm feet e.g.: Feet 2A, 5, 16, 18 Straight stitch foot Darning foot e.g.: Feet 13, 35, 38, 43, 53 5.5mm Dual feed foot BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 132 von 172...
  • Page 133 Press the presser foot indicator (marked in red) at top left. • The currently attached presser foot will be displayed in the box top left, along with all other feet on further 6 pages. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland...

  • Page 134: Bsr Foot Interface

    Repair notes: • Check BSR plug and connector. • Check cables for deformation and/or wear and tear. • Replace BSR foot. • Replace PCBA Accessories Connector (see 3.2.18). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 134 von 172...

  • Page 135: Menu 5 - Stepping Motors (Mounting Locations In The Machine)

    Swap connectors with the presser-foot pressure stepping motor to check if the fault is with the motor or the PCBA-Base. Caution! Disconnect from the power supply. Do not disconnect or reconnect when the machine is powered. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 135 von 172...

  • Page 136: Presser-Foot Pressure Stepping Motor

    Do not disconnect or reconnect when the machine is powered. Do not connect the stepping motor to the stitch length or the dual feed stepping motor, as these two motors work with higher amperage! BERNINA International AG Seestrasse 161 CH-8266 Steckborn...

  • Page 137: Pinning Positions Of All Stepping Motors

    5. Repair notes: • Check plugs and cables for deformation and/or wear and tear. • Replace the winder motor (see 3.2.4). • Replace PCBA-Base (see 3.2.7). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 137 von 172...

  • Page 138: Stitch Length Stepping Motor

    Swap connectors with the dual feed stepping motor to check if the fault is with the motor or the PCBA-Base. Caution! Disconnect machine from the power supply. Do not disconnect or reconnect when the machine is powered. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 138 von 172...

  • Page 139: Sideways Motion Stepping Motor

    Swap connectors with the console stepping motor to check if the fault is with the motor or the PCBA- Base. Caution! Disconnect machine from the power supply. Do not disconnect or reconnect when the machine is powered. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 139 von 172...

  • Page 140: Menu 6 - Adjustments

    Note: In order to ensure the carrying out of all crucial adjustments and calibrations, follow the check list in menu Note: Do not run a threaded machine without fabric! BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 140 von 172...

  • Page 141: Balance

    • The basic value is 0, the setting ranges from +4 to -4. • Press to save the value. Note re feed-direction adjustment: • button = forward, button = backward BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 141 von 172...

  • Page 142: Fine-Adjustment

    • The “9” must be stitched without gaps between the stitched lines. What to adjust: • Turn balance cam a (T10) to adjust until the “9” is stitched properly. Turn CW Turn CCW BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 142 von 172...
  • Page 143 Note re rotating direction when adjusting: • Rotate the balance cam a clockwise = the leaf pattern pulls together • Rotate the balance cam a counterclockwise = the leaf pattern pulls apart.  BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland...

  • Page 144: Fine-Adjustment (Sideways Feed)

    • Turn balance cam a CW or CCW to adjust until the pine is stitched properly. • Points 1 and 2 must be flush. End point 2 may however be 1mm above level Turn CW  Turn CCW BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 144 von 172...

  • Page 145: Bdf Balance

    • Lower the presser foot. Press the permanent reverse button on the screen. • Sew the second set of 6 repeats in reverse. • The difference in length between the two stitch rows should not be larger than 12mm. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland...
  • Page 146 • Turning adjusting screw a counterclockwise will shorten the left side of the diamond stitch pattern while the right side of the diamond pattern will be lengthened. BERNINA International AG Seestrasse 161 CH-8266 Steckborn...

  • Page 147: Buttonhole Calibration

    • Check foot recognition in test 4l. • Replace presser foot. • Check plugs and cables for deformation and/or wear and tear. • Replace PCBA-ABC Sensor (see 3.2.16). • Replace PCBA-Base (see 3.2.7). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 147 von 172...

  • Page 148: Thread Cutter Clamping Mechanism (Magnet)

    Move to intermediate position and cut 185° thread. Move to needle stop position up. 220° Test Done 220° • The information 'Test Done' appears. • Press to return to menu 6. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 148 von 172...

  • Page 149: Upper-Thread Tension Reset To Default

    6. • If 'No', press to return to menu 6. The tension values remain unchanged. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 149 von 172...

  • Page 150: Resetting To Factory Settings (Reset All)

    6. The sewing settings remain unchanged. IMPORTANT: It is essential to save all the customer’s data on a BERNINA USB data stick before resetting to factory settings! See data saving in test 6h Presser-Foot Height And Presser-Foot Pressure...

  • Page 151: Automatic Upper-Thread Tension

    • Select the thread used for the thread tension adjustment (DMC 50, Belfil, Mettler or Amann). • A 'Successful!' message will appear on successfully completed adjustment. • Press to return to menu 6. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 151 von 172...

  • Page 152: Start-/Stop Unit (Ssu) Slide Control Calibration

    Repair notes: • Check slider for dust or dirt and smooth mechanical running. • Replace PCBA Front Cover (see 3.2.1). • Replace PCBA-Base (see 3.2.7). BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 152 von 172...

  • Page 153: Bsr Sewing Mode

    Repair notes: • Check BSR foot for dust or stains. • Check BSR plug and PCBA Accessories Connector. • Replace PCBA Accessories Connector (see 3.2.18). • Replace BSR foot. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 153 von 172...

  • Page 154: Menu 7 - Embroidery Module (Emb)

    Y-direction belt tension o) X-direction belt tension A detailed description of the embroidery module service program can be found in the Embroidery Module Service- and Maintenance Manual. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 154 von 172...

  • Page 155: Menu 11 - Check Out

    5) Buttonhole calibration, menu 6c 6) Cleaning and servicing intervals, menu 1f After completion and confirmation of the last test, the check-out program will return to the main service menu. BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 155 von 172...

  • Page 156: Chapter 6 - Lubrication Diagram

    Chapter 6 – Lubrication Diagram = Klüber OY 100 (002779.70.01) = Velocite 6 (033567.50.01) = Klübersynth UH1 14- 1600 (002779.72.02) Head frame Dual feed BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 156 von 172...
  • Page 157 Threader mechanism / Needle drive BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 157 von 172...
  • Page 158 Toothed-segment needle-bar support Dual feed crank shaft Dual feed main shaft lift and advance cam BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 158 von 172...
  • Page 159 Hook shaft / hook race / hook Feed-dog fork BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 159 von 172...
  • Page 160 Base shaft / feed-dog lift and advance cam Feed-dog crank shaft BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 160 von 172...

  • Page 161: Chapter 7 - Firmware Update

    Update files are available for downloading from Infogate. • The update files for BERNINA 780, 750 and 710 can be downloaded to one BERNINA USB stick but must be saved on the first level of the memory directory (root directory).
  • Page 162 USB memory. level of the USB memory (root No valid Updates on USB Stick directory). Defective or incompatible USB Use a BERNINA USB stick. stick. Check functioning of USB stick on a pc. Is the USB stick connected?

  • Page 163: Update - Alternative Access

    After the machine has been switched on, the update process will start and check the data on the USB stick. Note: On completion of the manual update procedure, the machine must be started manually. BERNINA International AG Seestrasse 161 CH-8266 Steckborn...

  • Page 164: Chapter 8 - Maintenance Guidelines

    • Defined wear-and-tear parts are subject to a charge; the parts declared in the spare-parts-warranty extension (Bernina warranty provision) are excepted. • Compliance with maintenance intervals allows system functioning to be ensured and increases the service life of the sewing and embroidery machines.

  • Page 165: Implementation Of The Maintenance Intervals

    • Service entries must be made by the technician in the Service Program after maintenance or repair work – if not, the maintenance stitches will not reset to zero. • The same holds true for the cleaning-stitch reset. BERNINA International AG Seestrasse 161 CH-8266 Steckborn...

  • Page 166: Wear-And-Tear-Parts Definition

    • In the case of intensive use for which the machine was not designed, increased wear-and-tear of parts cannot be ruled out. • In order to ensure continuously defect-free operation of the sewing and embroidery machine, BERNINA recommends replacing the parts according to the table (9.4.2) once the tenth maintenance interval is reached. •...

  • Page 167: Operating-Time-Related Parts

    8.4.2 Operating-Time-Related Parts BERNINA 780 / 750 / 710 Art. # Article maintenance Remarks interval: 033734.7X.01 Crankshaft (complete) 10 / 19 033460.7X.00 Crankshaft (complete) 10 / 19 Dual feed 10 / 19 033772.5X.00 Drive belt Dual feed 034393.7X.00 Hook guidway spare parts set 10 / 19 033455.7X.00...

  • Page 168: Maintenance Checklist

    • Read out the stitch and hour counter and enter on the Service Report. Customer data backup in BERNINA 780 Service Program 1g. Connect BERNINA USB memory stick and select required button. Remove stick after confirmation by the machine. • Save the customer settings = Customer data saved onto the storage medium •...

  • Page 169: Functional Check

    • Needle bar support / needle bar Smooth running of the machine – mechanical • Swing bearing ease of movement • Bevel gears • Bobbin carrier / hook • Drive belt tensions BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Page 169 von 172...

  • Page 170: Maintenance Checklist Bernina 780 / 750 / 710

    8.5.4 Maintenance Checklist BERNINA 780 / 750 / 710 Front and rear cover Covers to be removed Base casing Stitch plate Hook Parts that must be removed Bobbin carrier Recommended parts according to Tear-and-Wear Parts Definition Free-arm area Needle bar / needle bar support...

  • Page 171: Embroidery Module

    Check /calibrate tests in Service Program For X/Y test pattern assessment refer to Service and Maintenance Manual of Embroidery Module. Sewing-off Cleaning Covers Final check Is the set of accessories complete? BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Seite 171 von 172...

  • Page 172: Document Revision History

    Document Revision History Date Version Description Author May 2012 First release in German Dieter Uhmeier BERNINA International AG Seestrasse 161 CH-8266 Steckborn Switzerland Seite 172 von 172...

This manual is also suitable for:

750 qe710

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