Janome 6260QC - Page 5 Service Manual Download

Page: 5 / 35

Condition

Cause

How to fix

Reference

6. Noisy

1. Backlash between shuttle

See mechanical adjustment

p.18

operation

hook gear and lower shaft

“backlash (lower shaft gear)”.

gear is too great.

2. Lower shaft gear is loose.

Eliminate the looseness.

3. Inappropriate belt tension.

See mechanical adjustment

p.28

“motor belt tension”.

4. Not enough oil.

Oil all moving parts.

5. Upper shaft is loose.

Eliminate the looseness.

7. Deformed

1. Inappropriate feed balance.

See mechanical adjustment

p.13

pattern

“stretch stitch balance”.

2. Inappropriate zigzag

See mechanical adjustment

p.27

synchronization.

“needle synchronization”.

3. Upper thread tension is too

See mechanical adjustment

p.10

strong.

“top tension”.

Summary of Contents for 6260QC -

Page 1: ...SERVICE MANUAL MODEL 6260QC ...

Page 2: ...to Hook 16 Clearance between Needle and Hook 17 Backlash between Hook Gear and Lower Shaft Gear 18 Replacement and Adjustment of Needle Threader Plate 19 Self Diagnostic Test 20 22 Replacing A Board and Fuse 23 Connector Diagram 24 Replacing Machine Socket 25 Replacing Transformer 26 Replacement and Adjustment of Upper Shaft Sensor 27 Replacing DC Motor 28 Replacing Slide Volume and F Board 29 Rep...

Page 3: ...e needle bar See mechanical adjustment p 15 height needle bar height 8 Inappropriate needle to See mechanical adjustment p 16 shuttle timing needle to shuttle timing 9 Inappropriate needle to see mechanical adjustment p 17 shuttle clearance needle clearance to shuttle 2 Fabric not 1 Presser foot pressure is too Adjust the presser bar level to moving weak make the pressure stronger 2 Incorrect f d ...

Page 4: ...bbin Thread bobbin correctly bobbin 2 Too much thread is on the Adjust the position of stopper thread bobbin 3 Lint is stuck inside the Clean the shuttle bobbin holder 4 Thread quality is too low Change to a high quality sewing thread 5 Thread is jamming around Clear out the jamming thread the bobbin 5 Needle 1 Needle is hitting the needle See mechanical adjustment p 12 breaks plate needle positio...

Page 5: ...Inappropriate belt tension See mechanical adjustment p 28 motor belt tension 4 Not enough oil Oil all moving parts 5 Upper shaft is loose Eliminate the looseness 7 Deformed 1 Inappropriate feed balance See mechanical adjustment p 13 pattern stretch stitch balance 2 Inappropriate zigzag See mechanical adjustment p 27 synchronization needle synchronization 3 Upper thread tension is too See mechanica...

Page 6: ... Service access 1 Face cover To remove 1 Remove the cap A 2 Remove the setscrews B and C 3 Lift up the top cover and unfasten the tab of the top cover from the face cover Remove the face cover To attach 4 Follow the above procedure in reverse Tab 4 ...

Page 7: ...A 2 pcs Handle Top cover Service Access 2 To remove 1 Remove the face cover see page 4 2 Remove the 2 setscrews A and remove the handle and top cover To attach 3 Follow the above procedure in reverse Top cover 5 ...

Page 8: ... Belt cover Service Access 3 Belt cover To remove 1 Remove the face cover and top cover see pages 4 and 5 2 Remove the cap 3 Remove the setscrews A B and remove the belt cover To attach 4 Follow the above procedure in reverse 6 ...

Page 9: ...Setscrew A Setscrew F Base Service Access 4 Base To remove 1 Remove the setscrews A to F Remove the base To attach 2 Follow the above procedure in reverse Setscrew B Setscrew C Setscrew E Setscrew D 7 ...

Page 10: ... 5 Front cover To remove 1 Remove the face cover top cover and belt cover See pages 4 6 2 Remove the setscrews A to E and loosen the setscrew F To attach 3 Follow the above procedure in reverse Setscrew B Setscrew E Setscrew D Setscrew F 8 ...

Page 11: ...ear cover To remove 1 Remove the face cover top cover and belt cover See pages 4 6 2 Remove the setscrews A B C D and remove the rear cover To attach 3 Follow the above procedure in reverse Setscrew D Setscrew B Setscrew A Setscrew C 9 ...

Page 12: ...th a 50 white polyester thread being pulled at approximately 50 mm sec If the tension is outside the standard range adjust it as follows Adjustment procedure 1 Remove the face cover 2 If the thread tension is too tight Turn the adjusting screw in the direction of A If the thread tension is too loose Turn the adjusting screw in the direction of B 3 Attach the front cover 10 ...

Page 13: ... is raised the clearance between the presser foot and the needle plate should be 6 0 mm When the presser foot is lowered the edge of the foot and the feed dog window on the needle plate should be parallel Remove the face cover and raise the presser foot Loosen the setscrew to adjust the presser foot height 6 0 mm and the presser foot alignment Tighten the setscrew firmly Attach the face cover Feed...

Page 14: ...re 1 Remove the front cover See page 4 2 Loosen the setscrews A and B Slightly tighten the setscrew A 3 Adjust the position of the stitch width adjusting plate so that the needle is in the center of the needle hole when the straight stitch is selected 4 Tighten the setscrews A and B 5 Check the needle drop position of the zigzag stitch with the maximum width Attach the front cover Mechanical adjus...

Page 15: ... procedure 1 Select the straight stretch stitch 2 Set the feed balancing dial at the standard position 3 Place a piece of paper on the machine and lower the presser foot Rotate the handwheel several turns and check the needle marks in the paper 4 Insert the screwdriver through the opening of the base to access the adjusting screw C If the forward feed is longer A B Turn the adjusting screw in the ...

Page 16: ...he foot 3 Loosen the setscrew A 4 Turn the handwheel to bring the feed dog to its highest position If the feed dog height is lower than 0 8 mm Turn the adjusting screw B in the direction of C If the feed dog height is higher than 0 9 mm Turn the adjusting screw B in the direction of D 5 Tighten the setscrew A Presser foot Feed dog 0 80 to 0 90 mm Needle plate surface Setscrew A Adjusting screw B C...

Page 17: ...le plate A and bobbin holder B 3 Turn the handwheel until the tip of the hook point meets with the right side of the needle 4 Remove the face cover and loosen the setscrew C 5 Adjust the needle bar height by moving the needle bar up or down 6 Tighten the setscrew C 7 Attach the face cover bobbin case and needle plate Note Be sure that the groove on the needle bar is facing right in the front Setsc...

Page 18: ...age 8 4 Turn the handwheel to bring the needle to its lowest position 5 Loosen the 2 setscrews C in the lower shaft gear 6 Turn the handwheel to raise the needle bar 3 4 mm from the lowest position 7 Rotate the lower shaft gear until the hook point meets with the right side of the needle while holding the handwheel in place 8 Tighten the setscrews C 9 Attach the front cover 10 Attach the bobbin ho...

Page 19: ...face cover See page 4 5 Turn the handwheel to bring the hook point just behind the test pin Loosen the setscrew C and adjust the clearance between the needle and hook point to 0 10 to 0 05 mm by moving the top end of the needle supporter back or forth 6 Tighten the setscrew C 7 Attach the face cover 8 Attach the bobbin holder and needle plate Replace the master needle with the sewing needle Needle...

Page 20: ...large Turn the lower shaft bushing in the direction of C If the rotary play is too small Turn the lower shaft bushing in the direction of D 5 Tighten the setscrew E 6 Attach the front cover 7 Attach the bobbin holder and needle plate Note After adjustment of the backlash check the needle timing to hook and feed dog height and adjust them if necessary Needle plate setscrew Nedle plate A Hook Bobbin...

Page 21: ...te holder with the pin B on the threader shaft Push the threader plate holder C up until it snaps in place To adjust 3 If the threader hook thrusts or hits against either left or right edge of the needle eye Loosen the setscrew E and adjust the position of the threader plate H See fig 2 4 If the threader hook thrusts against either top or bottom edge of the needle eye or misses the needle eye Remo...

Page 22: ...f the diagnostic test you require by pressing the needle up down button To begin Turn on the power switch If any of the following problems occur take the recommended actions in the order they are shown 1 The machine does not respond when the power switch is turned on Check each connector connection Replace the machine socket Replace the A board Replace the power transformer 2 The sewing machine la...

Page 23: ...LED does not blink on or off 1 Replace A board LED displays Button number is displayed when the button is pressed LED display is different from that shown to the left 1 Replace A board Button Button S1 S2 S3 S4 S5 S6 S7 S8 S1 S8 Press needle up down button LED displays 04 for one second Move the bobbin winder spindle to the right Return it to the left LED displays II Left Right LED display is diff...

Page 24: ...isplay is different from that shown to the left 1 Replace slide volume 2 Replace A board 10 Foot control Press the needle up down button The LED displays 10 for one second Depress the foot control down all the way and release it When the foot control is not depressed LED should display F0 to FF hexadecimal value When the foot control is fully depressed LED should display 05 to 2F When the foot con...

Page 25: ...ote Static electricity may damage the A board When handling the A board use a static dissipative wristband and anti static tabletop mat Setscrew A Setscrew B Setscrew B Board supporter Function button frame Setscrew B Setscrew A Setscrew B Setscrew B Setscrew A Setscrew B A board Setscrew C Setscrew C A board case Setscrew D Setscrew D Fuse A board F3 AC250V 2 5A 000144605 F2 AC250V 3 15A 00018290...

Page 26: ... Upper shaft sensor connector Machine socket connector secondary Zigzag motor connector Feed motor connector Slide volume Bobbin winder switch connector F board connector Lamp connector BH sensor connector Transformer connector secondary DC motor connector Transformer connector primary Machine socket connector primary Feed motor connector Zigzag motor connector Machine socket connector secondary U...

Page 27: ...e page 8 2 Remove the board supporter see page 23 and unplug the machine socket connectors both primary and secondary 3 Remove the 2 setscrews A and remove the machine socket To attach 4 Follow the above procedure in reverse Setscrew A Machine socket Setscrew A 25 ...

Page 28: ...o remove 1 Remove the front cover see page 8 2 Remove the board suppoerter see page 23 and unplug the transformer connectors both primary and secondary 3 Remove the 2 setscrews A and remove the transformer To attach 4 Follow the above procedure in reverse 26 ...

Page 29: ...hielding plate in the direction of A If the needle starts lateral movement lower than 7 4 mm Loosen the setscrew C and turn the upper shaft shielding plate in the direction of B 3 Attach the top cover To replace the upper shaft sensor 1 Remove the front cover see page 8 2 Remove the board supporter see page 23 and unplug the upper shaft sensor connector 3 Remove the 2 setscrews D and remove the se...

Page 30: ...d replace the DC motor To attach 4 Follow the above procedure in reverse To adjust motor belt tension 1 Slightly loosen the 2 setscrews A Move the motor to adjust the motor belt tension so that the belt is bent 7 9 mm when pressing the middle of the belt with approximately 300 grams of pressure 2 Tighten the setscrews Deflection 7 to 9 mm 300g loard Motor Setscrew A 28 ...

Page 31: ...ve the front cover see page 8 Unplug the slide volume connector 2 Remove the 6 CS rings and replace the slide volume Replacing the F board To remove 1 Remove the front cover see page 8 Unplug the F board 2 Remove the 5 CS rings 3 Remove the 3 setscrews A and replace the F board To attach 4 Follow the above procedure in reverse 29 ...

Page 32: ... 2 Unplug the zigzag motor connector 3 Remove the 2 setscrews A and replace zigzag motor To attach 4 Follow the above procedure in reverse Note After replacement check the needle drop position and adjust it if necessary see page 13 Setscrew A Zigzag motor Setscrew A 30 ...

Page 33: ...tor To remove 1 Remove the front cover see page 8 2 Unplug the feed motor connector 3 Remove the 2 setscrews A and replace feed motor To attach 4 Follow the above procedure in reverse Feed motor Setscrew A Setscrew A 31 ...

Page 34: ...stment procedure 1 Remove the top cover see page 8 2 Set the bobbin winder spindle in the sewing position and loosen the setscrew Adjust the clearance between the bobbin winder arm and the switch mounting to 0 7 1 3 mm 3 Tighten the setscrew 4 Attach the top cover Setscrew Switch mounting Bobbin winder arm 0 7 to 1 1 mm Sewing position Bobbin winding position 32 ...

Page 35: ...ft until the LED display changes from L to H 7 Next turn the adjusting screw to the right until the LED display changes from H to L 8 When the gap of the buttonhole foot is 1 4 mm the LED should display H When the gap is 1 8 mm the LED should display L 9 Turn off the power switch 10 Attach the face cover Note If there is any lint or dust in the buttonhole sensor slit clean it out with a swab To en...

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