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Husqvarna 1100 CD, Service Manual

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Husqvarna 1100 CD Service Manual Download Page 19

 104 72 30-26 Husqvarna  service manual   19

Lower thread indicator

When the lower thread is almost at an end the machine gives a warning signal and a bobbin
flashes on the information display.
The lower thread indicator consists of an IR-diode that is reflected against a mirror on the
hub of the bobbin case, if the upper part of the bobbin is out of thread, and is received by a
photo transistor.
If the indicator does not work, it may be due to the indicator or the bobbin case being dirty
which makes it impossible for the IR-light to pass.
If the indicator still doesn’t work it should be replaced.
The fault may also be found on the circuit board, its connections or in some cases on the
LCD board.
You can check the indicator if you connect it to the circuit board (but don’t mount it) and
hold a mirror in front of it.

Photo transistor
(receiver)

IR-diode
(emitter)

Mirror

SEWKNITWORLD

Summary of Contents for 1100 CD

Page 1: ...104 72 30 26 Husqvarna service manual 1 SERVICE MANUAL MODEL 1200 1 1100 1090 1070 1050 SEWKNITWORLD ...

Page 2: ...over 9 Hook 10 Driver 10 Main switch and feed dip button 10 Foot control 11 Cog belt short 12 Cog belt long 12 Wiring diagram 13 Service casette 14 17 Switch for presser foot lift 18 Buttonhole meter 18 Lower thread indicator 19 Stepmotors Thread tension sewing head guide side motion 20 Transformer 1050 1070 1090 21 Transformer 1100 1200 22 Electronic board 1050 1070 1090 21 Electronic board 1100 ...

Page 3: ...llelism of the feed dog 34 16 The sideways setting of the feed dog 34 17 The feed dog height 34 18 The lengthwise movement of the feed dog 35 19 The bobbin winding device 35 20 The balance of the stitch length 36 40 21 Pre setting of the step motor of the guide 41 22 Pre setting of the step motor of the side motion 42 23 The sideways setting of the feeding mechanism 43 Dismounting and mounting ins...

Page 4: ...4 Husqvarna service manual 104 72 30 26 SETTINGS SEWKNITWORLD ...

Page 5: ...s settings which must be maintained to ensure that the machine functions satisfactorily The third section covers dismantling and mounting instructions The fourth section contains a fault finding diagram The diagrams only give indication as to where the detail or mechanism is located in the machine For more detailed information regarding the construction etc refer to the diagrams in the spare parts...

Page 6: ...ervice men or service workshops should be equipped The needle is often used as a setting gauge The setting ratings are adapted to needle size 90 and when setting in the feed direction the needle should be set in the middle of the needle hole Page 29 Be sure to use an undamaged needle 2 Gauge for setting the timing of the hook in relation to the needle P 30 Ref No 411 17 52 01 3 Gauge for the gap b...

Page 7: ...No 411 66 89 01 2 5mm for the timing of the hook in relation to the needle P 30 and for the gap between the hook cover and the driver P 24 Ref No 411 86 01 01 5 Shortened adam key 2 5mm for the setting of the presser foot P 25 and of the needle in relation to the presser foot P 27 Ref No 412 27 65 01 6 Key to set the stitch length balance P 36 40 Ref No 412 27 66 01 7 Magnetic screwdriver with two...

Page 8: ...ch plate Setting to needle P 29 Presser foot Requirements There should be no scratches on the underneath of the presser foot Action Exchange a damaged presser foot Comments How the fabric is held between the presserfoot and the stitch plate plays an important role in the stitch formation Refer to all presser feet See Operating Manual Feed dog Requirements The top side of the feed dog must not be d...

Page 9: ... spindle should be carefully cleaned with the brush in the accessory box At the same time make sure that pieces which may have become wound around the spindle are removed Thread tension of the bobbin case P 32 The hook cover Requirements The inside of the hook cover must not be damaged Action Damaged hook cover must be exchanged Regarding the gap between the hook cover and the driver P 24 Comments...

Page 10: ...The surface of the driver against the hook must not be damaged worn or uneven in any way which might hinder the passage of the thread Action Damaged hook is to be exchanged P 52 The main switch and feed dip button If the main switch or the feed dip button doesn t work satisfactorily remove the rear cover and front panel P 44 Exchange the complete unit or spring A SEWKNITWORLD ...

Page 11: ...t 2 The cable should be easily extractable from the cord device of the foot control and after pulling the cable slightly it should be rewound on the cord device Action The foot control or the cord device are to be exchanged Dismantling P 49 The foot control Requirements The speed should be continuously controllable from the lowest r min to full speed Action Test the foot control on a machine that ...

Page 12: ...uired tension is obtained Comments The motor is driven by direct current DC 24 V whereby the demands on insulation clearance are less than by 220 V The cog belt long Requirements The belt tension should not be so loose that it permits slipping when the machine is locked and the foot control is depressed A tighter tension makes more noise The belt must not be damaged Adjustment Loosen the nut A by ...

Page 13: ... 1 THREAD TENSON MOTOR 2 PRESSER FOOT SWITCH 3 LAMP LENGHT SENSOR 4 LAMP 5 MAIN MOTOR 6 NEEDLE MOTOR 7 LOW THREAD INDICATOR 8 FEEDING MOTOR 9 SIDE MOTION MOTOR BE SURE THAT CABLES TO DRIVE BOARD ARE CORRECTLY CONNECTED BEFORE SWITCHING ON MAIN SUPPLY MODEL 1050 1090 MODEL 1070 MODEL 1100 1200 1 SEWKNITWORLD ...

Page 14: ...o the casette terminal in the front cover Get into the service mode of the machine by holding the back feeding button and stitch length pressed while turning on the main switch Service program model 1050 1070 1090 To facilitate the control and setting of the different functions of the machine there is a service program Handling Get into the service program of the machine by holding the back feedin...

Page 15: ...g no 5 P 26 The setting of the needle in relation to the presser foot Setting no 6 P 27 Key 7 Is used when setting the step motor of the thread tension Setting no 13 P 33 The step motor now takes its calibration position Key 8 Is used when checking the setting above The thread tension pulley shall set at 5 5 normal position Key 9 Is used when pre setting the step motor of the guide Setting no 21 P...

Page 16: ...calibration position Setting no 5 P 26 Key 6 Is used when setting the step motor of the sewing head Setting no 5 P 26 The setting of the needle in relation to the presser foot Setting no 6 P 27 Key 7 Is used when pre setting the step motor of the guide Setting no 21 P 41 The step motor now takes its calibration position Key 37 Is used when setting the stitch length balance Setting no 20 P 37 The m...

Page 17: ...t mentioned keys are not used at service or are withoutfunction Functions of the service program 1090 Key 1 Code letter of the program memory Key 2 Display test where all symbols light up on the display Key 4 Check that the arm shaft sensor stop right function works The latter looks after when the step motors have to be reset it reads the speed and the stop right functions The function is correct ...

Page 18: ... are correct the fault is inside the circuit board or the connection between the circuit board and the LCD board Exceptionally the fault can also be inside the LCD board Buttonhole meter Check the functions according to directions for use Inside the buttonhole meter there is a potentiometer that is influenced by the measuring wheel A The function of the buttonhole meter can be checked by a multi r...

Page 19: ... is out of thread and is received by a photo transistor If the indicator does not work it may be due to the indicator or the bobbin case being dirty which makes it impossible for the IR light to pass If the indicator still doesn t work it should be replaced The fault may also be found on the circuit board its connections or in some cases on the LCD board You can check the indicator if you connect ...

Page 20: ...ing head or step motor In some rare cases the fault can be in the LCD board The step motor of the guide feeding The setting of the feeding direction from forward to backward between long and short stitches is done by a bipolar step motor with 7 5 steps If this setting doesn t work despite checking of setting no 21by means of the service casette Check the circuit board by means of gauge 412 02 56 0...

Page 21: ... 1090 The guide board is in the front cover and contains light emitting diodes and a micro chip Foil keyboard 1050 The machine has one foil keyboard which is placed in the upper part of the front cover with among other things buttons for stitch width and stitch length adjustment Foil keyboard 1070 1090 The machine has 2 foil keyboards one of them elliptically is placed in the upper part of the fro...

Page 22: ...ing buzzer The key functions are checked by means of the service casette Guide board The guide board is in the front cover and contains among other things light emitting diodes and contacts carbon pressure for the keys to the sewing guide Check by means of the service casette Foil keyboard The foil keyboard is in the bottom of the casette terminal of the front cover and contains keys from the case...

Page 23: ...must always be set so that the screwdriver slot is to the left of the centre of the hole see illustration The same play in the hook gear can be obtained by turning the shaft a half turn but the hook will then lie eccentrically in relation to the hook cover The shaft is also shiftable Check therefore that the gap between the hook cover and the driver has not been altered P 24 Comment II Too little ...

Page 24: ...d be such that when the hook is exchanged for the gauge 411 16 49 01 the gauge should have no play but must be turnable Adjustment Undo the screws which hold the hook cover Exchange the hook for the gauge and replace the hook cover Undo the screw A for the hook shaft and shift the shaft B without turning it to the correct position Tighten the screw Comment The shaft B is eccentrically mounted and ...

Page 25: ...Requirements The sewing head should be set in such a way that the needle hole of the presser foot is in accordance with the needle hole of the stitch plate Adjustment Undo the screws D turn the pulley for the presser foot pressure so that the right one becomes available and the nut E Shift the sewing head until requirement is obtained Tighten the screws first the left one and the nut Comments On t...

Page 26: ...ndwheel until the feed dog reaches its highest position Press button no 5 on the service casette program calibration position Check the distance 1 2mm between the calibration wing A and the calibration stop C with the distance gauge 412 27 60 01 Adjust by loosening the screw of the calibration wing A and set distance Press button no 6 on the service casette program centre position Check the distan...

Page 27: ... seen from the side Adjustment Switch on the mainswitch Keep the machine set at straight stitching centre position alt service mode program button no 6 Undo the screws A by means of an adam key 412 27 65 01 Put the adam key into the hole B and move the needle Needlepoint bar until requirement obtains Tighten the screws Check the setting by switching mains on and off a couple of times Thereafter ch...

Page 28: ...between the hook and the driver a certain axial play must be possible Contact between needle and hook can therefore result and cause a sound which can be heard when the machine is running without thread This contact damages neither the hook nor the needle as long as a needle with a groove according to system 705 H is used Adjustment The position of the needle is adjusted by moving the sewing head ...

Page 29: ...t the stitch plate to the correct position Fix the stitch plate by hand and tighten the nut Comments Needle 120 The gap between the centre line of the needle and the Needle 80 flat part of the needle base varies with the thickness of Stitch plate the needle To enable the needle 120 to move freely from the front edge of the underneath of the needle hole set the stitch plate so that the needle 90 is...

Page 30: ...as now moved up 2 5mm from the turning position the distance for forming the loop Hold the hook back so that it is pushed downward and backward The tip of the hook shall now be in the centre of the needle Adjustment Remove the pointed screw B and undo the other two screws Repeat the checking points 1 2 and 3 Hold the arm shaft and turn the hook and the driver by pulling the short cog belt in towar...

Page 31: ...en the tip of the hook and the needle eye with the needle at the centre position 1 5mm is the starting measurement but as this is difficult to estimate use the corresponding measurement with the needle at the right hand position instead Adjustment Set the machine for zig zag right hand position 6mm Move the needle upward by pulling the short cog belt in toward the machine until the tip of the hook...

Page 32: ... model 1100 1200 When the sewing guide of the machine is set at non elastic normal and straight stitching resp zig zag a correct take up should be obtained when the catch of the thread tension pulley 5 5 is right in front of the index Comment 1 The sewing guide adjusts the thread tension to the fabric resp to the sewing at which the machine is set This is done by means of the computer and the step...

Page 33: ...ngth buttons while switching on the main switch Loosen the screw in the cog wheel B of the step motor Turn the thread tension pulley to 0 Press button n 7 on the service casette Tighten the screw Check according to requirements 14 The setting of the thread take up spring Requirements The casing C should be set in such a way that the thread take up spring has finished its movement when the needle e...

Page 34: ...og is positioned correctly in the stitch plate 16 II The sideways setting of the feed dog Requirements B model 1050 1070 1090 1100 The feed dog should move freely in the grooves of the stitch plate sideways Requirements B model 1200 At side feeding the feed dog should move freely in both side positions goes for all 4 feed dog rows Adjustment Turn the nut B until requirements is reached 17 III The ...

Page 35: ...w Check according to requirements NOTE Check that the stitch setting fork B is parallel with the connecting rod C after tightening 19 The bobbin winding device Limiting when bobbin winding Requirements When bobbin winding the machine shall stop when the bobbin is full with thread up to approx 1 mm from the edge of the bobbin Adjustment Loosen the locking ring A by means of a tool Thereafter turn t...

Page 36: ...ngth buttons while turning on the main switch Select menu D Press button no 7 The machine will now sew a pre programmed stitch D7 whose left and right side must not differ in length with more than 2 mm the see illustration Coarse adjustment Select menu D Press button no 6 feeding 0 Turn the nut A until the feed dog comes to a stand still when the foot control is pressed down Fine adjustment Select...

Page 37: ...utton no 41 The machine will now sew a pre programmed stitch 41 whose left and right side must not differ in length with more than 2 mm the see illustration Press button no 37 The machine will now sew the signs C D B P S T 8 which should have the correct aspect Coarse adjustment Press button no 40 feeding 0 Turn the nut A until the feed dog comes to a stand still when the foot control is pressed d...

Page 38: ...utton no 39 The machine will now sew a pre programmed stitch 41 whose left and right side must not differ in length with more than 2 mm the see illustration Press button no 24 The machine will now sew the signs C D B P S T 8 which should have the correct aspect Coarse adjustment Press button no 38 feeding 0 Turn the nut A until the feed dog comes to a stand still when the foot control is pressed d...

Page 39: ...chine will now sew stitch A 38 of the A casette whose left and right side must not differ in length with more than 2 mm the see illustration The length of the stitch is pre programmed Press button n13 The machine will now sew the signs C D B P S T 8 which should have the correct aspect Coarse adjustment Press button n11 on the service casette feeding 0 Turn the nut A until the feed dog comes to a ...

Page 40: ... and stitch length buttons while turning on the main switch Press button no 12 on the service casette The machine will now sew stitch L 48 the rabbit of the L casette The chin of the rabbit must not show much difference in height Press button n13 The machine will now sew the signs C D B P S T 8 which should have the correct aspect Coarse adjustment Press button no 11 on the service casette feeding...

Page 41: ...ements 0 6 mm is reached Tighten the screw and check Thereafter set The balance of the stitch length P 36 40 21 Pre setting of the step motor of the guide version 2 Get into the service mode of the machine by pressing the reverse feeding button and stitch length while the main switch is turned on For 1200 use the service casette and press button no 9 For 1050 1070 1090 press button no 7 Requiremen...

Page 42: ...dwheel in such a way that the step motor changes between its 2 positions The distance between the pin B and the side of the segment shall be equally large in both positions see fig 1 Adjustment Turn on the mains switch of the machine Choose a side feeding stitch from casette L Loosen screw A and place the cog segment in such a way that pin B arrives in the middle of the opening of the cog segment ...

Page 43: ...bearing bearing clamp B and link C of the feeding device and in the other side feeding position between bearing bearing clamp D and link E of the feeding device Adjustment Loosen screws A and push the step motor unit with the feeding device sideways Tighten the screws Check the play according to requirements NOTE The spherical bearings B and D must be trued so that the feeding device can move easi...

Page 44: ... four screws C Press the buttons for On Off and for the feed dip Push the cover carefully upward Remove the two cables that are connected to the circuit board The parts of the front cover Loosen the three cords from the LCD board A Loosen the screws that hold the LCD board and the printed circuit for the guide B The LCD board may now be removed and thereafter the guide board Mounting Fit in the 3 ...

Page 45: ... P 44 Insert the extractor tool into the socket so that its plastic part comes to rest against the surface of the socket See ill 1 Cautiously press the pliers together See ill 2 Check that the pliers lift the chip straight out of the socket See ill 3 Put the memo chip into the ESD package Put the new memo chip into the socket Check that its bevel is correctly positioned See ill 4 Push the memo chi...

Page 46: ... LCD board and guide board P 44 Dismount code spring A Dismount foil keyboard C Remove glue residues from the surface Remount in reverse order NOTE When mounting code spring A an interlayer B is to be used between the code spring and the foil keyboard in order to avoid to damage the contact surfaces SEWKNITWORLD ...

Page 47: ...ws A holding together the upper part and the lower part of the transformer Use the tin solder from the 7 connections of thetransformer to the circuit board by means of a soldering pencil and tin exhauster Remove the circuit board Solder the circuit board into the transformer Remount the upper part and lower part of the transformer Try the transformer by means of the transformer tester which is par...

Page 48: ...ing P 35 Circuit board 1100 1200 Dismounting Remove the rear cover P 44 Remove the front cover P 44 Loosen all cables rearwisen from the circuit board Loosen screw A at the lower edge the screw B holding the plate for the transistors and the screw C holding the arm shaft transmitter Loosen the cable D for the transformer from the board Wiring instruction P 13 Circuit board 1050 1070 1090 Dismounti...

Page 49: ...otentiometer can now be dismounted Carefully bend aside the two pegs D holding the cord device in place and push the cord device out of the foot control Mount in the reverse order The foot control Dismounting Turn it upside down Insert a screwdriver between the sections and carefully bend the pins A out of their positions Part the sections Push the plug B device out of the potentiometer C The pote...

Page 50: ... nut A on the screw and remove it Remove the screws B The feeding guide can now be removed Mounting Fit the block C into the guide D see illustration Push aside the stitch regulator fork E Mount the feeding guide into the machine and thread the stud of the fork into the hole of the block Tighten the screws B Tighten the nuts A Connect the cables to the circuit board Mount the cable groove Thereaft...

Page 51: ...ook off the spring A Loosen the screws B for the rear and front bearing clamps Remove the feeding mechanism compl and the stitch regulator fork Mounting Insert the feeding mechanism in such a way that the two bearings C come into their place and that the link at the front edge is placed under the lifting clamp D of the feed dog Tighten the screws B Thread the spring E onto its studs between the th...

Page 52: ...ount in the reverse order NOTE Connecting the cables see wiring diagram P 13 The driver Dismounting Remove the bobbin case Loosen the 4 screws of the hook cover and remove the hook Set the slot of the driver under the feed dog Undo the locking screw A of the driver which is accessible through the base plate Push out the driver by pressing on the shaft B from the rear Mount in the reverse order NOT...

Page 53: ... lower shaft can be removed Mount in the reverse order Adjust the axial play of the lower shaft by means of stop ring C The must not exceed 0 05 mm Therafter set The cog play of the hook gear P 23 The gap between the hook cover and the driver P 24 The gap between the hook and the needle P 28 The setting of the stitch plate in relation to the needle P 29 The timing of the hook in relation to the ne...

Page 54: ...he sewing head outward carefully and release it first from the pivot C of the thread take up lever and then from the pivot D of the needle bar Use the handwheel Mounting First insert pivot D of the needle bar and then pivot C into their bearings Put the sewing head in position Use the handwheel Tighten the screws B and the nut A Mount the lamp holder Connect the cords to the circuit board Wiring d...

Page 55: ...Remove the arm shaft Note Do not damage the arm shaft transmitter Mount in the reverse order NOTE The axial play of the arm shaft is adjusted by means of belt wheel E The play must not exceed 0 005 mm Thereafter set The setting of the presser foot at right angles to the feeding direction P 25 The gap between the hook and the needle P 28 The setting of the stitch plate in relation to the needle P 2...

Page 56: ...evice and the side feeding mechanism by pushing it downwards Loosen screws A and remove the side feeding mechanism The step motor is connected to the circuit board according to the wiring plan Mount in the reverse order Thereafter set The pre setting of the step motor of the side feeding P 42 The sideways setting of the feed dog P 34 The stitch length balance P 40 SEWKNITWORLD ...

Page 57: ...d If not exchange code spring P 46 4 Try a new front cover compl with foil keyboard or just foil keyboard P 46 C All or some of the keys below the panel do not function 1 Check that none of the keys of the machine stays pressed 2 Try a new LCD board P 44 D All or some of the keys of the sewing advisor do not function 1 Check that none of the keys of the machine stays pressed 2 Check the connection...

Page 58: ...o switch of the sewing head P 18 5 Try a new motor P 48 6 Try a new circuit board P 48 K The machine races when switched on or by pressing the foot control 1 Try a new circuit board P 48 2 Try a new LCD board P 44 L The zig zag movement of the machine does not work correctly 1 Check that the symbol for twin needle does not blink on the display 2 Check by means of the service cassette that the arm ...

Page 59: ...y a new LCD board P 44 5 Try a new circuit board P 44 Q One or all of the diodes of the sewing advisor do not work 1 Check the connection between the guideboard and the LCD board 2 Try a new guideboard P 48 R The machine does not alarm when the lower thread ends CHECK Insert the bobbin case without bobbin and let the machine run about 10 revs It should now alarm Insert a full bobbin into the bobbi...

Page 60: ... the lamp glass and the circuit board are correct Replace the lamp glass if necessary V The side motion of the machine does not work at all 1 Check the pre setting of the step motor of the side motion P 42 2 Check the sideways setting of the feeding mechanism P 43 3 Check the smooth running of the feed dog in the stitch plate P 34 4 Check that the cable connection between the step motor and the ci...

Page 61: ...104 72 30 26 Husqvarna service manual 61 SEWKNITWORLD ...

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