Singer 9985 Service Manual
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Singer 9985 Service Manual

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SERVICE MANUAL
9985
9/10/2013

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Summary of Contents for Singer 9985

  • Page 1 SERVICE MANUAL 9985 9/10/2013...

  • Page 2: Table Of Contents

    3. Messages on LCD ................... 33 4. Test Pattern Screen / Erasing Memory ........... 34 5. Calibrating the screen ................35 6. Electrical Parts Connection ..............36 7. Function buttons of CPU board ............... 37 SINGER® is a registered Trademark of The Singer Company Ltd.

  • Page 3: Removing The Exterior Parts

    SERVICE MANUAL REMOVING THE EXTERIOR PARTS The exterior parts should be removed in sequence as followings. CAUTION: Always disconnect the main lead plug from electcrial outlet when removing the exterior parts. A. Light Cover 1. Loosen the light cover set screw (a). 2.

  • Page 4: Top Cover (Flap)

    SERVICE MANUAL C. Top Cover (Flap) 1. Open the top cover. 2. Push the right side of top cover backward and remove the hinge (a). 3. Slide the top cover to the right and remove the hinge (b). D. Hinge Cover 1.

  • Page 5: Side Enclosure

    SERVICE MANUAL F. Side Enclosure 1. Remove the screw (a). 2. Push the side enclosure slightly backward to come off the 2 hooks (b, c). 3. Pull the side enclosure to the right and remove it. G. Handle and Unit Cover 1.

  • Page 6: Needle Plate

    SERVICE MANUAL 4. Next, push the left side of unit cover backward and pull up it to come off from the thread guide cover. 5. Slide the handle and unit cover to the left and remove them. H. Needle Plate 1.

  • Page 7: Front Enclosure

    SERVICE MANUAL I. Front Enclosure 1. Loosen the screw (a). 2. Loosen the screw (b). 3. Tilt the machine backward. Push the left side of rear enclosure (c) and pull the front enclosure (hook-d will come off). 4. Pull up the front enclosure and come off the hook-e. Pull the enclosure to the left and come off the hook-f.

  • Page 8: Rear Enclosure

    SERVICE MANUAL J. Rear Enclosure 1. Lower the presser foot lifter. 2. Remove the 3 screws (a, b, c). (screw-c is longer than others.) 3. Pull the rear enclosure backward and remove it. K. Front panel (from Front Enclosure) 1. Disconnect the 2 connectors from the front panel (a: Start/Stop switch board) (b: Controller jack assy.) 2.

  • Page 9: Replacing The Exterior Parts

    SERVICE MANUAL REPLACING THE EXTERIOR PARTS The exterior parts should be replaced in reverse se- quence when removing. (K. to A.) K. Front panel (to Front Enclosure) 1. Place front enclosure and fit the hook (h) and retighten the 5 screws (c-g). 2.

  • Page 10: Front Enclosure

    SERVICE MANUAL I. Front Enclosure 1. Insert the cable into the connector (h) until stop. Push the both black part and lock the cable securely. 2. Replace the front enclosure so that the 4 hooks will fit in place. 3. Retighten the screw (a) and (b) with pushing the front enclosure to the machine frame.

  • Page 11: Handle And Unit Cover

    SERVICE MANUAL G. Handle and Unit Cover 1. Set the handle to the unit cover and insert the handle hinge pin into the left side hole of handle from left side. 2. Place the handle and unit cover onto the top of machine.

  • Page 12: Side Enclosure

    SERVICE MANUAL F. Side Enclosure 1. Replace the side enclosure so that the each hook fit into place. 2. Retighten the screw (a). E. Thread Tension Cover 1. Replace the thread tension cover so that the each hook fit into place. 2.

  • Page 13: Top Cover (Flap)

    SERVICE MANUAL C. Top Cover (Flap) 1. Slide the top cover to the left so that the hook (b) will fit onto the pin of unit cover. 2. Pull the right side of top cover and snap on the hook (a) onto the pin of unit cover.

  • Page 14: Light Cover

    SERVICE MANUAL A. Light Cover 1. Loosen the light cover set screw (a). 2. Replace the ligth cover so that the hook (b) will fit into place. 3. Retighten the screw (a).

  • Page 15: Check And Adjustment

    SERVICE MANUAL CHECK AND ADJUSTMENT 1. HEIGHT OF NEEDLE BAR Height of needle bar could be the cause for stitches to skip. Check as the following procedures. 1. Set the pattern to [Utility stitch No.1] which is straight stitch on center needle position. 2.

  • Page 16: Gap Between Needle And Hook

    SERVICE MANUAL 2. GAP BETWEEN NEEDLE AND HOOK If the needle hits against the hook, it may be the cause of needle and thread breakages. If the gap between needle and hook is too big, it will cause to skip stitches. Check and adjust as follows: Prior to make this adjustment, check that the needle is not bent and the needle is inserted correctly.

  • Page 17: Timing Of The Hook

    SERVICE MANUAL 3. TIMING OF THE HOOK Prior to making this adjustment, be sure that the needle bar is set at the correct height. (Sec. 1) Check the timing of hook as follows: 1. Remove the needle plate and bobbin holder. 2.

  • Page 18: Height Of The Feed Dog

    SERVICE MANUAL 4. HEIGHT OF THE FEED DOG If the feed dog does not come up over the needle plate enough, it will result in insufficient and/or uneven feed of fabrics. 1. The feed dog should come up over the needle plate (1.2-1.3 mm) when its highest position.

  • Page 19: Needel Center Position

    SERVICE MANUAL 5. NEEDLE CENTER POSITION 1. When the straight stitches is set at center needle position (Straight No.1), the needle should fall into the center position (align with the center line mark (a) of the general purpose foot (A)). If it is not so, adjust as follows: 2.

  • Page 20: Timing Of The Upper And Lower Shaft

    SERVICE MANUAL 6. TIMING OF THE UPPER AND LOWER SHAFT The upper and lower shaft must be positioned correctly as follows. 1. Remove the front enclosure. 2. Turn the handwheel toward you until the needle is its lowest point. At this time, the mark (a - very small molded line on edge) on the lower shaft timing pulley must be facing toward you.

  • Page 21: Adjusting The Forward Reverse Stitch

    SERVICE MANUAL 7. ADJUSTING THE FORWARD REVERSE STITCH When stretch stitch sewing, the lengths of the forward and reverse stitches should be the same. Check and adjust as follows. • We recommend checking “Height of the Feed-dog (Sec. 4)” before you make this adjustment. 1.

  • Page 22: Bobbin Winder

    SERVICE MANUAL 8. BOBBIN WINDER If bobbin winds unevenly, adjust as follows: 1. If bobbin winds as shown, turn the adjusting screw (a) to the left. 2. If bobbin winds as shown, turn the adjusting screw (a) to the right. 3.

  • Page 23: Height And Direction Of Presser Foot

    SERVICE MANUAL 9. HEIGHT AND DIRECTION OF PRESSER FOOT A. HEIGHT OF PRESSER FOOT The height of the presser foot from the needle plate should be 6.5 mm when it is lifted up. 6.5 mm B. DIRECTION OF PRESSER FOOT The edge of the presser foot is parallel with the feed dog slot on the needle plate.

  • Page 24: Height Of Needle Threader

    SERVICE MANUAL 10. HEIGHT OF NEEDLE THREADER If the height of needle threader is not correct, the hook on threader will not enter the needle eye. Adjust as follows: 1. Remove the light cover. 2. Raise the needle to its highest point by turning the handwheel.

  • Page 25: Adjustments For Buttonhole Lever Position

    SERVICE MANUAL 11. ADJUSTMENTS FOR BUTTONHOLE LEVER POSITION 1. If the machine dose not sew even with the buttonhole lever all the way down, it means that the buttonhole lever is not positioned properly. Also, if the buttonhole lever is not positioned properly, the machine will sew buttonhole as shown or incorrectly.

  • Page 26: Motor Belt Tension

    SERVICE MANUAL 12. MOTOR BELT TENSION If the motor belt tension is too tight or too loose, machine will not run smoothly. Adjust as follows: 1. Remove the front enclosure. 2. Loosen the 2 screws (a, b) 3. Move the motor up or downward and tentatively tighten the screws.

  • Page 27: Backlash Of Hook Gear

    SERVICE MANUAL 14. BACKLASH OF HOOK GEAR If there is too much play on the hook gear on the turning direction, it may be the cause for machine not to sew properly and/or making excessive sewing noise. 0.1-0.3 mm 1. Free play at the tip of hook may be 0.1-0.3 mm. If it is not so, adjust as follows.

  • Page 28: Upper Thread Tension Unit

    SERVICE MANUAL 15. UPPER THREAD TENSION UNIT The upper thread tension regulator unit has been adjusted to the best sewing conditions when pattern is selected. However, if you wish to change this, do it as follows: 1. Remove the thread tension cover, unit cover and front enclosure.

  • Page 29: Locating The Defected Electrical Part

    SERVICE MANUAL LOCATING THE DEFECTED ELECTRICAL PART 1. To turn off the audible beep You can turn off the audible beep. 1. Touch the setting button at home screen. 2. To turn off the beep, touch the left side of button (a). To turn on the beep, touch the right side of button (b).
  • Page 30 SERVICE MANUAL Condition of switches and sensors The condition of each switch and sensor is indicated as follows. a. BH-BackSW: Buttonhole lever switch -Rear OFF=Neutral ON=Lever is pulled. b. BH-FrontSW: Buttonhole lever switch -Front OFF=Neutral ON=Lever is pushed. Lower the buttonhole lever and check these switch by pulling or pushing this lever.
  • Page 31 SERVICE MANUAL j. Key: Response of each button By pressing each button, number will be indicated as illustration. k. FootController: Condition of Foot Controller Foot controller is not connected : the number 255 will appear. Connect the foot controller : the number will change to 75-73.
  • Page 32 SERVICE MANUAL Checking Starting point of each pulse motor 1. When self-diagnositic program is running; • By pressing the button (a), Z pulse motor (Z) will move to starting point. • By pressing the button (b), F pulse motor (F) will move to starting point.

  • Page 33: Messages On Lcd

    SERVICE MANUAL 3. Messages on LCD 1. Winding the bobbin. 2. Lower the buttonhole lever. 3. After sewing buttonhole, raise the presser foot lifter and set the frame of buttonhole foot to starting position. 4. Release the foot controller pedal. 5.

  • Page 34: Test Pattern Screen / Erasing Memory

    SERVICE MANUAL 4. Test Pattern Screen / Erasing Memory Test pattern screen is used at factory. But some patterns are useful for maintanance. 1. Turn off the power switch and push the bobbin winder spindle to the right. 2. Turn on the power switch with pressing the thread cutter button and touching the screen.

  • Page 35: Calibrating The Screen

    SERVICE MANUAL 5. Calibrating the screen If response of touch screen is not good, calibration may be needed as below. 1. Turn off the power switch and push the bobbin winder spindle to the right. 2. Turn on the power switch with pressing the needle up/ down button.

  • Page 36: Electrical Parts Connection

    SERVICE MANUAL 6. Electrical Parts Connection a. CPU Board (34726) r. Speed Control Board Assy. (34625) b. Power Circuit Unit (EU:33985/US:33940) s. LCD Board Assy. (34722) c. Transformer (EU33829/US33828) t. LCD (34724) d. Terminal Box Assy. (EU:33089/US:33083) u. Harnes (LD160) e.

  • Page 37: Function Buttons Of Cpu Board

    SERVICE MANUAL 7. Funciton buttons of CPU board Without the front cover unit, you can sew straight stitch (center needle position) or forward reverse adjusting pattern by using the function buttons of CPU board. Mode I: Before you turn on the power switch, turn the bobbin winder spindle to the left.

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