Bernina activa 130 Service Manual

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Instruction manual & sewing manual (58 pages)

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Service Manual

activa 130/140

virtuosa 150/160

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Summary of Contents for Bernina activa 130

Page 1 Service Manual activa 130/140 virtuosa 150/160...
Page 3 Safety Regulations Attention! All electrical and electronic components operate at dange- rous voltages. The mains plug must be withdrawn before making any adjustments to the machine. Wait about 30 seconds after removing the plug (capacitor discharge). This manual remains the property of our company. Reproduction, publication or information to a third party without our written approval is forbidden.
Page 4 Contents (mechanic) Contents (electronic) Page Page Removing covers 5,6,7 Description The needle Block diagram L-Print (single voltage type) Tensioning the belts Bobbin winder device L-Print (universal type) Presser foot fixation A/S-Print Presser foot height Electrostatic discharges Darning foot height Exchanging the A/S-print Distance needle/hook Exchanging the A/S-print (virtuosa-up) Needle plate position...
Page 5 Adjustment of BERNINA Activa 130/140 and Virtuosa 150/160 The service manual is intended to help with small repairs and adjustments. The instructions lay no claim to com- pleteness. They are not suitable for a complete assembly or disassembly procedure. Important:...
Page 6 Technical data cont’d. Operating controls: activa 130 activa 140 virtuosa 150 virtuosa 160 Buttons Rubber pad Rubber pad Rubber pad Rubber pad Screen 56 x 37,5 56 x 37,5 Size in mm 37,5 x 37,5 37,5 x 37,5 symbolic symbolic...
Page 7 Removing covers Top cover: · Remove 2 screws (1). · Remove top cover. Head cover: Removing L-print, back cover, front · Remove the screw (2). cover: · Remove head cover. · Remove balance button (3).
Page 8 Removing covers Refer to safety instructions on page 1! · Remove L-print cover screw (4). · Swing out the cover and disconnect the four encircled connections P-160/161/162/163. · Remove the complete L-print. · Disconnect the six encircled connections and remove ·...
Page 9 Removing covers Free-arm cover: · Remove screw (6), access through the base plate. · By snapping out remove the hinged front · Slide out the free-arm cover. cover. · Remove the cap (5). Base plate: · Remove 3 screws (7). ·...
Page 10 BERNINA uses the 130/705H needle system with scarf for the activa/virtuosa models. The needle size is measured in millimetres. Needle size ”100” means the needle stem thickness = 1 mm or Nm 80 (needle mm) = 0.8 mm dia.
Page 11 Tensioning the drive belt (base shaft) The belt tension is achieved automatically between the tension roller and the tension spring. · Loosen the screw (8) slightly of the tension roller holder. · Turn handwheel backwards and forwards. · Tighten the screw (8). Tensioning the drive belt (moter) ·...
Page 12 Checking the bobbin winder device The thread should be wound evenly with pre-tension and the bobbin should be correctly filled. Correction for one-sided winding: · Turn the adjustment screw (11) in or out as appropriate. Correcting the bobbin filling: · The flip-flop spring should be in the third tooth of the release lever.
Page 13 Checking the presser foot height · Lower the feed-dog. · Raise the lifter lever. · Check the height with 7.5 mm gauge. Correction: · Loosen screw (17) on the presser foot bar guide. · Place the presser foot on the gauge (7.5 mm). Keeping it parallel to the markings.
Page 14 Checking the needle position in the direction of feed (needle/hook distance) · Insert no. 80 needle (checked). The lateral distance between needle and hook (in the scarf) should be 0.01 mm to 0.05 mm. Correction (up to 0.2 mm): Correction (more than 0.2 mm): ·...
Page 15 Checking the needle position of the zig-zag stitch · Switch machine on. · Select zig-zag. · Set stitch width to maximum. · Turn the handwheel and observe whether the lateral spacing from the edge of the stitch hole is the same to the left and right.
Page 16 Checking the feed-dog position in the needle plate · The feed-dog must be equidistant to each side of the needle plate. Check: When lowering the feed-dog, it must drop by itself. Correction: · Loosen 3 screws (26). · Move the pivot points sideways to the correct position. ·...
Page 17 Checking the feed-dog height At their highest point the tips of the feed-dog teeth Example: should be 0.05 mm higher at front than at the back. - Front 0.95 mm, back 0.90 mm - Front 1.00 mm, back 0.90 mm - Front 1.00 mm, back 0.95 mm Correction: (rear of feed-dog) ·...
Page 18 Checking the position of the driver in the hook race · The hook driver (34) should be 0.1 - 0.15 mm behind the front edge of the hook race. Correction: · Loosen the screw (37) of the driver shaft. · Push the complete driver to the prescribed position. ·...
Page 19 Checking the hook adjustment loop lift (synchronization) · Remove the needle plate · Pin the stepping motor (needle position centre) · Pin the balance piece (42) of the needle drive (5.5 mm pin) and turn the handweel until the stop position is reached.
Page 20 Checking the needle height · Set needle position to the right. · Position the hook tip flush with the right-hand edge of the needle. · The lower edge of the hook tip should now be 0,2 mm above the needle eye. Correction: ·...
Page 21 Basic adjustment to the knee lifter lever The end of the knee lifter should be vertical under the right edge of the LCD. Correction: · Loosen the screw (53) of the feed-dog drop unit. · Insert knee lifter lever. · Adjust the lifter to the convenient position. ·...
Page 22 Lower thread tension For testing use synthetic thread No. 60/2 ply white, left twist. The lower thread tension is checked with the moveable setting weight No. 006 543 7001. The bobbin case is placed in the weight gauge just as in the hook. Checking: Hold the free end of the thread and suspend the bobbin case with the setting weight (without any additional...
Page 23 Thread regulator spring Checking weight : Correction tension: · 12 - 15 g(use BERNINA Tension spring 006 038 5000) · By turning screw (57) clockwise or anti-clockwise, the tension will become more or less. Checking Position: ·...
Page 24 Description of the electronics The electronics of the BERNINA activa/virtuosa are basi- cally contained in two modules (printed circuits), namely on the power L-print and the A/S print (see block dia- gram). Power L-print The power L-print is mounted at the rear of the sewing machine.
Page 25 Block Diagram Bobbin winder P-Print Foot control A/S-Print Ret-Print Buttonhole Print 0088357100 Motor power Main motor 30 V/DC L-Print Sewing light 12 V/5 W Mains...
Page 26 L-Print (single voltage type) Main motor Control signals for Power supply main motor for A/S-Print Sewing light Galvanically seperated Secondary fuse 3 A-flink low voltage (without sewing light) Transformer Main switch Circuits in this area operate at dangerous voltages Primary fuse (Mains)
Page 27 A/S-Print Blue Stepping motor 4-pin Stitch length Stepping motor Black Stitch width 4-pin Foot control Yellow Power supply 5-pin 30 V/5 V Blue Control signals 5-pin motor Black Position indicator 5-pin White bobbin winder motor 4-pin Potentiometer LCD Contrast Ret-Print Buttonhole...
Page 28 Diagnostic instructions Warning Dangerous voltage levels ! Mains voltage (refer to L-print page 24) The switch part of the L-print and mains cable carry dan- gerous voltages. For your own safety do not touch the L-print until about 30 seconds after the main voltage has been switched off. This is the time required for the capacitors to discharge.
Page 29 Replacing the A/S-print · Remove the top cover. · Remove the balance knob. · Remove the 6 cable connections on the A/S-print. · Remove the front cover. (see pages 5 and 6) · Disconnect the cable connection of the foot control unit (59).
Page 30 Service panel virtuosa Service panel activa...
Page 31 Test programme What is to be tested: >9< Page 1. Sewing-off 2. Forward/reverse feed equalization 3. Sewing >9< 29,30 4. Software version display 5. Number of hours the machine has been working 6. Speed equalisation 7. Pinning position of both stepping motors 8.
Page 32 Mechanical fine adjustment If the stitch formation is not absolutely closed after elec- tronic compensation, a fine adjustment can be made with the balance regulating shaft (62). Procedure: · Remove the balance button. · Turn the balance regulating shaft as required. ·...
Page 33 Test No. 6 Maximum speed equalisation (Service Panel) What is to be tested What to adjust Normal condition Maximum speed equalisation (s.p.m. Select service programme No. 6. The maximum speed appears on the stitch/minute) Press foot control until “OK” screen. The speed is set automatically.
Page 34 Test No. 15 Stepping motor SB (Service Panel) What is to be tested What to adjust Normal condition Stepping motor SB Select service programme No. 15. Stepping motor SB and the needle (See also service programme No. 8) bar must move to and fro. Test No.
Page 35 ‘config’ on the button and either the config - or screen. config + button, the number can be set to 1 through 4. activa 130 = 1 activa 140 = 2 virtuosa 150 = 3 virtuosa 160 = 4 virtuosa 150/160 Japan=5...
Page 36 L-Print (universal type) Control signals for Power supply Main motor main motor for S-print Sewing light Secondary fuse T-3A (without sewing light) Transformer Main switch Circuits in this area operate at dangerous voltages! Primary fuse (Mains)
Page 37 Replacing the A/S-print (virtuosa-up) · Remove the top cover. · Remove the balance knob. · Remove the 7 cable connections on the A/S-print. · Remove the front cover. (see pages 5 and 6) · Disconnect the cable connection of the foot control unit (59).
Page 38 Service panel (virtuosa-up)

This manual is also suitable for:

Activa 140 Virtuosa 150 Virtuosa 160