Husqvarna Viking Designer I Service Manual
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Husqvarna Viking Designer I Service Manual

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SERVICE MANUAL
Printed in Sweden
Made in Sweden
March 1999
104 72 47-26
Replaces 104 72 45-01

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Summary of Contents for Husqvarna Viking Designer I

  • Page 1 SERVICE MANUAL Printed in Sweden 104 72 47-26 Made in Sweden March 1999 Replaces 104 72 45-01...

  • Page 2: Table Of Contents

    Contents Directions for use Service tools Service program Upper thread tension - Functions of the service menu 3. Sensor check - Functions of the service menu 2. Calibration of the touch panel Update of the memory Covers Upper rear cover Lower rear cover Front cover Parts of the front cover...
  • Page 3 Dismantling and mounting Base Plate Transformer Circuit board - Circuit diagram Stop right circuit board Sewing head The step motor of the needle The step motor of the presserfoot lifter The thread tension compl. The hook cover compl, step motor house. Parts of the hook cover compl.

  • Page 4: Directions For Use

    Directions for use These service instructions are intended to be used by service workshop personnel, or by salesmen who carry out servicing their own districts. They assume a thorough knowledge of the handling of precision appliances and accessibility to service tools. The manual is divided into two sections and covers all service operations and checks which should be carried out when making a complete overhaul of a sewing machine.

  • Page 5: Service Tools

    Service tools A reasonable requirement in a domestic sewing machine is that it should able to sew all types of fabrics used in the home. The settings made when assembling and sewing-in the machines are those most suited to give the best results in the majority of fabrics and fabric combinations.

  • Page 6: Service Program

    Service Program Service program In order to facilitate the checking and setting of the different functions of the machine there is a service program. Press Handling Get into the service program of the machine by pressing the reverse feed button and the sensor foot pivot button while the main switch (A) is switched on.
  • Page 7 Service Program Service program Functions of the service menu 1. On the top of menu The revision of the program Service Menu 1 Row 1 Toucharea Needle/Feed Cal 0 Upper needle position - Checking the centre position of the needle step motor.
  • Page 8 Service Program Service Menu 1 Row 3 Toucharea Servo-sewing head On/Off Sewing heads Servo function ON and OFF. Servo - sewing head Servo takes its calibration position. Embroidery Unit Is used to check the sideways and lenghtwise movement of the embroidery unit. Embroidery Unit Cent The embroidery hoop sensor arm takes its centre position.

  • Page 9: Upper Thread Tension - Functions Of The Service Menu 3

    Service Program Sensor check - Functions of the service menu 2. Operation Get into the service program. Touch Sensor- , row 3. Active square is filled Check of armshaft's first sensor (stop right function) Check of armshaft's second sensor (stop right function) Check of needle Check of pressarfoot's first sensor Check of pressarfoot's second sensor...

  • Page 10: Calibration Of The Touch Panel

    Service Program Calibration of the touch panel How to synchronize the touch area of the touch panel with the symbols on the screen. Get into the service program of the machine. Press the needle stop button or touch Touch ,row 2 in the service menu 1. 1.

  • Page 11: Update Of The Memory

    Service Program Update of the memory The Designer 1 has a memory in which the characteristics and stitches of the machine are stored. In order to update the memory the machine has an update mode. Revision of the program The revision of the program can be seen in the lower right side of welcome screen or checked in the service program menu 1 How to update...

  • Page 12: Covers

    Covers Upper rear cover 1. Remove the five screws (A). 2. Remove the two screws (B). 3. Remove the screw (C). Lower rear cover 1.Remove the screw (D). 2. Remove the lower rear cover pulling it backwards on the right-hand side and at the same time push the front covers upper and lower side of the free arm together.

  • Page 13: Front Cover

    Covers Front cover Dismounting 1. Dismount the rear covers. 2. Remove the button for the bobbin winding sensor stop, by pulling it straight out. 3. Remove the two screws (B) from behind. 4. Remove the two screws (C) in the base plate. 5.

  • Page 14: Parts Of The Front Cover

    Covers Parts of the front cover Dismounting 1. Dismont the rear covers 2. Dismount the front cover. 3. Remove the LCD frame from the front cover by dismouning the 4 screws (A). 4. Remove the LCD light cable (E) 5. Remove the LCD by dismounting the 4 screws (C). Mounting Mount in reverse order.

  • Page 15: Settings

    SETTINGS 104 72 47-26...

  • Page 16: The Play Of The Hook Gear

    Settings 1. The play of the hook gear It is impossible to obtain an equally large play in one rotation of the cog wheel, but it should be as small as possible at the tightest spot during the revolution. Check 1.

  • Page 17: Setting The Hook In Relation To The Feeding Eccentric (After Feeding)

    Settings 2. Setting the hook in relation to the feeding eccentric (after feeding) Check 1. The needle shall be in its centre position, straight stitching. 2. Set the needle in its lowest turning postion. 3. The tip of hook (A) shall now be centred behind the needle, and the tap of the worm gear should be positioned according to fig.

  • Page 18: Belt Tension, Arm/Lower Shaft Belt

    Settings 3. Belt tension, arm/lower shaft belt 1. Dismount rear cover and front cover. 2. Dismount the bobbin winding device. 3. Loosen the two screws (A) of the bearing clamps. 4. The belt tension can now be adjusted by turning bearing (B) which is eccentric. NOTE! The hole (C) should always be on the front half.

  • Page 19: Setting The Feeding Unit Sideways

    Settings 5. Setting the feeding unit sideways Check 1. The distance A and B shall be equal between the screw (C) and the edge of feeding device shaft (D). Adjustment 1. Loosen the 2 screws in the feeding device. 2. Move the feeding device sideways until the distance A and B is equal between the screws (C) and the edge of feeding device shaft (D) 3.

  • Page 20: Basic Setting - The Step Motor Of The Needle

    Settings 6. Basic setting - the step motor of the needle Check 1. Insert a new needle 90 in the machine. 2. Set the needle in its upper turning position. 3.The needle should always get to the centre position, when the main switch is turned on repeatedly.
  • Page 21 Settings Adjustment Get into the service program of the machine. The needle should be in its highest position. Touch Needle - , row 1. Loosen screw (E) in the cog wheel (D) on the step motor shaft. Turn the cog wheel until the needle is in the centre of the presser foot.

  • Page 22: Setting Of The Needle In Relation To The Presser Foot

    Settings 7. Setting of the needle in relation to the presser foot Check Insert a new needle 90 in the machine. When the machine is set at straight stitching centre position, the needle bar shall be set in such a way that a needle 90 passes through the centre of the needle hole in the presser foot.

  • Page 23: The Gap Between The Needle And The Hook

    Settings 8. The gap between the needle and the hook Check 1. Set the machine on straight stitching. 2. Insert a new needle 90 in the machine. 3. Rotate hand wheel until the tip of the hook arrives behind the needle. Check the gap by pressing a small screw driver against the needle.

  • Page 24: The Timing Of The Hook In Relation To The Needle

    Settings 9. The timing of the hook in relation to the needle Check - Set a new needle 90 into the machine - Dismount the stitch plate, bobbin case holder and the bobbin case. - Set machine on straight stitching. - As the needle is moving upwards, the tip of the hook should pass behind the centre of the needle, when the needle is 2.5 mm above its lower turning position.

  • Page 25: The Needle Height

    Settings 10. The needle height Check 1. Bring the needle into its lower turning position. 2. The gap between the upper end of the needle and the surface (B) of the hook ring should be 29.15 ± 0.2 mm. The check is executed with a polished needle 90 which is 29.15 mm long. Order nr.

  • Page 26: Presser Foot Parallelism To The Feed Dog

    Settings 11. Presser foot parallelism to the feed dog Check The presser foot (A) should be parallel to the feed dog (B) . Adjustment 1. Loosen screw (C) and turn the presser foot until it is parallel to the feed dog. 2.

  • Page 27: Setting The Stitch Plate (The Hook Cover) In Relation To The Needle In The Feeding Direction

    Settings 13. Setting the stitch plate (the hook cover) in relation to the needle in the feeding direction. Check 1. Insert a new needle 90 in the machine. 2. In the feeding direction the needle should descend right into the middle of the needle hole of the stitch plate.

  • Page 28: The Height Of The Hook

    Settings 15. The height of the hook Is checked between the bobbin case and the case holder Check The distance between the bobbin case and the case holder should + 0.1 be 0.5 -0,05 The check is carried out at the tightest spot between the bobbin case and the case holder.

  • Page 29: Pre-Setting Of The Step Motor For The Side Feeding

    Settings 16.Pre-setting of the step motor for the side feeding Check 1.Dismount the circuit board. 2. Dismount the side feeding unit. 3. Mount the circuit board. 4.Connect the side feeding unit. Hold the side feeding unit in your hand. 5.Touch Side-M - ,row 2.

  • Page 30: Setting The Feeding Mechanism Sideways

    Settings 17.Setting the feeding mechanism sideways Check 1. Get into the service program 2. Touch Side-M ,row 2. Turn the handwheel in such a way that the step motor changes between its 2 positions. The feed dog should not at any point touch the stitchplate.

  • Page 31: Feed Dog Height

    Settings 18. Feed dog height Check 1. Bring the feed dog to its highest position. 2. The top of the feed dog should be 0.9-1.1 mm above the stitch plate. Check with setting gauge 411 49 93-01 Adjustment 1. Bring the feed dog to its highest position. 2.

  • Page 32: Threading Device

    Settings 19.Threading device Check 1. Insert a new needle. 2. Bring the needle to its highest turning position. 3. The threader hook shall go smoothly into the needles eye. See Fig 1 and Fig 2. Adjustment 1. Loosen the the two screws (A) on the back of the threader head (B). 2.

  • Page 33: Stitch Length Balance Basic Setting

    Settings 20.Stitch length balance basic setting Check Get into the service program. Touch Feed- ,row 1, the feed dog shall now stand still when the foot control is pressed (0-feeding). Adjustment 1. Touch Feed- ,row 1.Loosen the screw (A) of the cog wheel and turn it until the feed dog comes to a stand-still when the foot control is pressed.

  • Page 34: Pre-Setting The Step Motor Of The Feed Dog

    Settings 21. Pre-setting the step motor of the feed dog Check 1 Set the needle in its lower turning position. The feed dog should after turning the mains switch several times on and off always reach such a position that 2.5 mm straight stitching will be obtained. Check 2 Get into the service program.

  • Page 35: Stitch Length Balance

    Settings 22.Stitch length balance Check A Both columns of the buttonhole should be of the same density. B The machine should sew a motif according to the symbol. C The mending stitch should look according to the illustration. (Use the mending stitch in the service menu - touch , row 5 ) Fine adjustment Touch...

  • Page 36: Lower Thread Tension (Thread Tension Of The Bobbin Case)

    Settings 23. Lower thread tension (thread tension of the bobbin case) Check 1. Insert a full bobbin into the bobbin case. 2. The thread tension spring of the bobbin case shall give a resistance of 12 - 20 g when pulling the thread slowly. Adjustment 1.

  • Page 37: Upper Thread Tension - Normal Position

    Settings 24.Upper thread tension - Normal position Check A correct take-up should be obtained on straight stitch and zig-zag when the sewing advisor is set on woven medium. Comment 1 The sewing advisor adjusts the thread tension according to the selection of fabric and sewing technique.

  • Page 38: Upper Thread Tension - Embroidery Position

    Settings 25.Upper thread tension - Embroidery position Check A correct take-up should be obtained on at embroidery stitch (e.g.embroidery stitch No 1, menu 4 on Disk 100 Designer 1 Sampler). Comment The following embroidery threads shall be used: Upper thread :Thread thickness No 40 ( e.g. Sulky No 40) Lower thread: Thread thickness No 70 ( e.g.

  • Page 39: Upper Thread Guard Sensor

    Settings 26. Upper thread guard sensor Check When the upper thread is finished or breaks the machine will stop. This is done by means of a photo-diode (B) on the push button board which reads the movement on the screen (C) which moves simultaneously with the thread take-up spring (D).

  • Page 40: Setting The Thread Take-Up Spring

    Settings 27. Setting the thread take-up spring Check The thread take-up spring should have completed its movement when the needle eye reaches the fabric. The check has to be carried out in straight stitching in cotton. Adjustment 1. Remove the thread tension cover by taking a firm grip on the top of the cover and then carefully pulling it away from the front cover.

  • Page 41: Disconnection When Winding The Lower Thread

    Settings 28. Disconnection when winding the lower thread Check When winding up the lower thread onto the bobbin the machine should stop when there is a min. of 1 mm between the edge of the bobbin and the thread. Adjustment Turn by means of a screwdriver torx the disconnection (A) until the correct amount of thread is obtained.

  • Page 42: Dismantling And Mounting

    Dismantling and mounting Base Plate Dismounting 1. Dismount the upper and lower rear cover. 2. Dismount front cover. 4. Dismount the 2 screws (A) for the transformer. 3. Dismount the 3 screws (B). 104 72 47-26...

  • Page 43: Transformer

    Dismantling and mounting Transformer Dismounting 1. Dismount upper rear cover. 2. Loosen the two screws (A) of the transformer from below in the base plate. 3. Push the transformer to the right so that the mains switch part is exposed from the base plate and lift it upwards.

  • Page 44: Circuit Board - Circuit Diagram

    Dismantling and mounting Circuit board - Circuit diagram Dismounting 1. Dismount rear cover . 2. Dismount front cover . 3. Loosen the 3 screws (A) holding the circuit board and the cooling plates and lift out the board from the machine. 4.

  • Page 45: Stop Right Circuit Board

    Dismantling and mounting Stop right circuit board Dismounting 1. Dismount rear cover . 2. Dismount front cover . 3. Disconnect the stop right board cable from the circuit board 3. Dismount the screw (A) thats holds the stop right circuit board. 4.

  • Page 46: Sewing Head

    Dismantling and mounting Sewing head Dismounting 1. Dismount rear covers and front cover. 2. Dismount the cable from the main circuit board to the sewing head connection board. 3. Loosen the screw (A) 4. Loosen screw (B) and remove the block (D) by pushing the screw (B) down. 5.

  • Page 47: The Step Motor Of The Needle

    Dismantling and mounting The step motor of the needle Dismounting 1. Dismount rear covers . 2. Dismount front cover . 3. Dismount the step motor by removing the 2 screws (A) . 4. Dismount the step motor cable on the sewing head connection board. Mounting 1.

  • Page 48: The Step Motor Of The Presserfoot Lifter

    Dismantling and mounting The step motor of the presserfoot lifter Dismounting 1. Dismount rear covers . 2. Dismount front cover . 3. Dismount the lamp of the sewing head by removing the screw (A) 4. Dismount the cable from the sewing head connection board. 5.

  • Page 49: The Thread Tension Compl

    Dismantling and mounting The thread tension compl. Dismounting 1. Dismount rear covers. 2. Dismount the front cover. 3. Dismount the thread tension cover by taking a firm grip on the top of the cover and then carefully pulling it away from the front cover. 4.

  • Page 50: The Hook Cover Compl, Step Motor House

    Dismantling and mounting The hook cover compl, step motor house. Dismounting 1. Dismount the rear covers and the front cover . 2. Move the presser bar to its highest position. 3. Remove the needle. 4. Dismount the presser foot holder. 5.

  • Page 51: Parts Of The Hook Cover Compl

    Dismantling and mounting Parts of the hook cover compl. Changing the thread cutter knife Dismounting 1. Dismount the stitchplate. 2. Snap away the thread cutter cover. 3. Dismount the thread cutter knife arm (B). 4. Dismount the thread cutter holder (D) . 5.

  • Page 52: Feeding Unit

    Dismantling and mounting Feeding unit Dismounting 1. Dismount rear and front covers. 2. Dismount the hook cover. 3. Dismount the needle and the presser foot holder and set the feeding eccentric straight backwards (Needle in the highest position). 4. Unhook spring (A) from the feed carrage and disconnect the draw bar from the feed dog frame.

  • Page 53: Feed Dog

    Dismantling and mounting Feed dog. Dismounting 1. Dismount the feeding unit. 2. Dismount the feed dog frame from the feed unit . 3. Dismount the feed dog by removing the 2 screws (A). Mounting 1. Press the feed dog and the feed dog frame against a straight sureface. See Fig 1. 2.

  • Page 54: The Side Feeding Mechanism Cpl

    Dismantling and mounting The side feeding mechanism cpl. Dismounting 1. Dismount rear cover and front cover 2. Dismount the main circuit board 3. Disconnect the draw bar (C) from the side feeding mechanism by removing the screw (A) and the clip (B). 4.

  • Page 55: The Step Motor Of The Feeding Unit

    Dismantling and mounting The step motor of the feeding unit Dismounting 1. Dismount rear cover and front cover. 2. Dismount the circuit board. 3. Dismount the base plate. 4. Unhook spring (A) at the end of the segment shaft. 5. Disconnect the draw bar from the side feeding mechanism. 5.

  • Page 56: Hook Compl

    Dismantling and mounting Hook compl. Dismounting 1. Dismount rear cover and front cover . 2. Dismount the feeding unit . 3. Loosen the screw (A) and lift hook compl. (B). Note! The hook can be dismounted without removing the feeding unit. Mounting 1.

  • Page 57: Bobbin Winding Device

    Dismantling and mounting Bobbin winding device Needle- and feeding movement should be disengaged when the ”bobbin shaft with its rubber ring” is pushed against the ring (B), and engaged when it is pushed back. Dismounting 1. Dismount rear covers and front cover . 2.

  • Page 58: Cover Y-Slide

    Embroidery Unit Cover Y-slide Dismounting Cautiously bend the cover so that the 5 snaps (A) are exposed and lift the cover upwards. Mounting Place the cover over the plate and press the snaps. Step motor cover Snap off the step motor cover by pushing in the snap (A) in the direction of the arrow. 104 72 47-26...

  • Page 59: Cover Upper Part

    Embroidery Unit Cover upper part Dismounting Move the Y-unit to its leftmost position Remove the 3 screw's (A) underneath the lower cover. Push the cover in the direction of the arrow to unhook the guides (B) from the embroidery unit. Mounting in reversed order.

  • Page 60: Embroidery Unit - X-Unit

    Embroidery Unit Embroidery unit X-unit Belt tension Check The belt should be adjusted in such a way that it should be possible to push in the belt approx. 4,5 mm with a force of 0,2 kg. Adjustment Adjust by loosening the screw (A) and move the plate (B) until a good belt tension is obtained.

  • Page 61: Embroidery Unit - Y-Unit

    Embroidery Unit Embroidery unit Y-unit Belt tension Check The belt should be adjusted in such a way that it should be possible to push in the belt approx. 5 mm with a force of 0,2 kg. Adjustment Adjust by loosening the screw’s (A) and move the plate (B) until a good belt tension is obtained.

  • Page 62: Hoop Holder

    Embroidery Unit Hoop holder Dismounting Remove locking washer (A), pull out the shaft (B) and remove the hoop holder. Remove the two screws (C), pull out the spring (D) and remove the plate. To remove the button, push out the pin (E) from the backside. To remove the hoop sensor snap off the spring (F).

  • Page 63: Step Motor, Y-Unit

    Embroidery Unit Step motor, Y-unit Dismounting Dismount the Y-slide cover. Dismount the step motor cover. Dismount the upper cover. Dismount the calibration stop (A) by pulling it up. Dismount the cable from the connection board. Dismount the step motor by removing the 2 screws (B). Mounting in reversed order.

  • Page 64: Fault Finding Diagram

    Fault finding diagram Fault finding diagram. Always update the flash memory to the latest version before doing any checking or adjustments, even if the flash memory already is of the latest version! The touch panel does not function. 1. Calibrate the touch panel. 2.
  • Page 65 Fault finding diagram The machine does not work when the foot control is pressed, but works when pushing the start button. 1. Check that the contact of the cord device of the cord is correctly pushed into the potentiometer. 2. Check by means of a new foot control (potentiometer, cord device). 3.
  • Page 66 Fault finding diagram The machine does not alarm when the lower thread ends. Before doing any service clean both diodes of the lower thread sensor and remove all fluff 1. Check the lower thread sensor in the service menu by rotating the hand wheel slowly 2.
  • Page 67 Fault finding diagram The buttonhole sensor does not work. 1. Make sure that the contact of the buttonhole sensor is correctly inserted and check its function by using the service menu 2. 2. Try a new buttonhole sensor and check its function by using the service menu 2. 3.

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