Related Manuals for Singer 7285Q
Summary of Contents for Singer 7285Q
- Page 1 Original issue Service Manual May, 2014 1/38 Page Model 7285Q Original issue: May 2014 Jaguar International Corporation...
- Page 2 Original issue Service Manual May, 2014 2/38 Page Model INDEX 7285Q 1. Disassembling of covers 2. Adjustment of feed dog height 3. Needle bar height 4. Needle threader height 5. Presser foot height and direction 6. Needle position at zigzag stitching 7.
- Page 3 Original issue Service Manual May, 2014 3/38 Page Model 7285Q 1. Disassembling of covers (1) Face cover side Remove screw A. Remove screw B. (2) Bottom cover side Loosen five screws.
- Page 4 Original issue Service Manual May, 2014 4/38 Page Model 7285Q 1. Disassembling of covers –continued-- (3) Back cover side emove two self-tapping screws. emove two screws. emove self-tapping screw.
- Page 5 Original issue Service Manual May, 2014 5/38 Page Model 7285Q 1. Disassembling of covers –continued-- (4) Front cover side Loosen screw A. Push up front cover to open inserting small screw driver between front and back covers. Open back and front covers.
- Page 6 Original issue Service Manual May, 2014 6/38 Page Model 7285Q 1. Disassembling of covers –continued-- Pull out front cover. Open mating portion of front and back covers using small screw driver. Push back cover by small screw driver. Force front cover open by small screw driver.
- Page 7 Original issue Service Manual May, 2014 7/38 Page Model 7285Q 1. Disassembling of covers –continued-- Force front cover open by small screw driver. Lift up front cover as below.
- Page 8 May, 2014 8/38 Page Model Adjustment of feed dog height 7285Q Checking: 1. Move feed dog to its highest position by turning hand wheel. Check to see if feed dog height is as illustrated below. 0.9 – 1.1 mm Adjustment: 1.
- Page 9 Original issue Service Manual May, 2014 9/38 Page Model 7285Q 3. Needle bar height Note: Make this checking before checking “Needle timing to shuttle” and ”Feed-dog timing (vertical motion)”. Checking: 1. Select straight stitch at center needle position. 2. Remove presser foot and needle plate, and then remove bobbin case.
- Page 10 May, 2014 10/38 Page Model 7285Q 3. Needle bar height –continued-- 3. Tighten the screw (A) securely after adjustment. Replace needle gauge with normal needle #90/14. 4. Check to see if needle threader operates correctly and there is not interference in...
- Page 11 Model 7285Q 4. Needle threader height 1. Use needle Singer 90/14. 2. Select straight stitch at center needle position. 3. Raise needle to its highest position by turning hand wheel toward you. 4. Lowering needle threader lever, check and see if hook is inserted into needle hole.
- Page 12 Service Manual May, 2014 12/38 Page Model 7285Q 4. Needle threader height --continued-- 7. If the direction of insert hook is deviated from correct position, adjust the hook position with the small screw driver in the accessory. Needle hole Hook...
- Page 13 Original issue Service Manual May, 2014 13/38 Page Model 7285Q 5. Presser foot height and direction Checking 5.6 mm 1. Lower the feed dog below the needle plate. 2. Raise the presser foot lever. 3. Check and see if clearance between the needle plate and the presser foot is about 5.6 mm.
- Page 14 Service Manual May, 2014 14/38 Page Model 7285Q 6. Needle position at zigzag stitching Checking: 1. Select widest zigzag stitch. 2. Turn hand wheel by hand and see if needle leaves the same clearance at both right and left end of needle plate hole.
- Page 15 Original issue Service Manual May, 2014 15/38 Page Model 7285Q 7. Clearance between needle and shuttle Make this checking before checking “Needle timing to shuttle”. Checking: 1. Select widest zigzag stitch. 2. Remove needle plate, bobbin case and face cover.
- Page 16 May, 2014 16/38 Page Model 7285Q 7. Clearance between needle and shuttle --continued-- 2. If needle clearance to shuttle at right and left position is not same, adjust position of fulcrum for needle swing support . Loosen bolt (A) located under bottom of support plate and adjust position of fulcrum.
- Page 17 May, 2014 17/38 Page Model 7285Q 8. Needle timing to feed dog Note: After adjustment, be sure to follow “Needle timing to shuttle”. As horizontal and vertical feed motion is unitized on this model, adjustment of feed timing is as follows: Checking: 1.
- Page 18 Service Manual May, 2014 18/38 Page Model 7285Q 9. Needle timing to shuttle hook Check “Feed timing (vertical movement)” and “Needle height” beforehand. Checking 1. Select widest zigzag stitch. 2. Remove needle plate. Check to see if needle is not bent.
- Page 19 Service Manual May, 2014 19/38 Page Model 7285Q 9. Needle timing to shuttle hook --continued-- 2．Tighten screws securely after adjustment. Meshing condition of shuttle race gear and lower shaft gear 1. Check meshing condition of gear (A) after adjustment. Check play of the gear at 4 positions –each 90 degree angle of 1 rotation of shuttle race.
- Page 20 Service Manual May, 2014 20/38 Page Model 7285Q 10. Adjustment of thread tension Checking: 1. Set thread tension at the center of “AUTO” position. 2. Pull thread between tension discs and check thread tension value with two twisted Polyester #50 thread.
- Page 21 May, 2014 21/38 Page Model 7285Q 11. Tension of timing belt Note: This checking is needed before and after adjusting “Needle timing to shuttle”. 1. Timing belt is engaged with gears on main and lower shafts. Too weak tension may result in slippage between shuttle gear and lower shaft gear due to thread jamming, bunching and fabric snagging.
- Page 22 Service Manual May, 2014 22/38 Page Model 7285Q 12. Motor belt tension Adjustment: 1. Remove the front cover. 2. Loosen two nuts (A) and adjust belt tension so that belt may be bent about 5 mm when it is pushed by pressure of 100g between upper shaft and motor.
- Page 23 May, 2014 23/38 Page Model 7285Q 13. Retaining bracket for bobbin case 1. Remove needle plate and bobbin case. 2. Check to see if corner of plate spring aligns with inside of wall (A) of shuttle race as illustrated below.
- Page 24 24/38 Page Model 7285Q 13. Retaining bracket for bobbin case –continued -- 6. Loosen screw (C) and adjust the position of reverse rotation stopper so that there may be a clearance of 1 to 1.5 mm between the projection and plate spring while turning the bobbin case back and forth.
- Page 25 Service Manual May, 2014 25/38 Page Model 7285Q 14. Origin point positioning of zigzag bight Checking meshing position of gears This procedure is needed only when disassembling and re-assembling cams. Checking 1. Remove face cover and turn off power switch.
- Page 26 May, 2014 26/38 Page Model 7285Q 15. Stitch length (A) Checking meshing position of gears This procedure is needed only when disassembling and re-assembling cams. Rotate motor gear clockwise to touch it with stopper pin and mesh these gears so that...
- Page 27 Original issue Service Manual May, 2014 27/38 Page Model 7285Q 15. Stitch length –continued-- In case of large deviation, adjust as follows: Setting 1. Turn off power switch. 2. Loosen one of two screws on motor gear. 3. Turn on power switch and rotate hand wheel towards you, and this motor shaft will be held at one of exciting position continuously after motor for stitch width is held at exciting position.
- Page 28 Service Manual May, 2014 28/38 Page Model 7285Q 15. Stitch length --continued-- (C) Stitch balance If forward and reverse stitch pitch is not balanced, adjust by changing position of motor. *Check meshing of motor gears and origin point positioning before adjustment.
- Page 29 Service Manual May, 2014 29/38 Page Model 7285Q 15. Stitch length --continued-- 2. Turn position adjusting bolt (B) on motor bracket in either direction using 3.0 mm hex driver. Change Inclination of feed regulator and stitch pitch will be varied: *Lower motor unit to change reverse stitch pitch.
- Page 30 Original issue Service Manual May, 2014 30/38 Page Model 7285Q 15. Stitch length --continued-- b. Rotate bolt (B) counter clockwise when the top of buttonhole is shaped as (2) illustrated in the previous page Note: *Loosen screw (A) beforehand. *Don’t overshoot.
- Page 31 Service Manual May, 2014 31/38 Page Model 7285Q 16. Needle stop at highest position Needle always stops at its highest position. This is controlled by sensor cam and sensor located on main shaft. Adjustment: 1. Raise needle to its highest position.
- Page 32 Original issue Service Manual May, 2014 32/38 Page Model 7285Q 17. Electronic component area AC Power Board 87553 Transformer Secondary 5P Connector cord Connect with CPU LED lamp harness Main motor DC 230v Transformer Primary...
- Page 33 Service Manual May, 2014 33/38 Page Model 7285Q 17. Electronic component area -- continued -- CPU board and SW board are unitized and located on control panel in this model. Be sure to check number printed on board. 84084 Start/atop switch, reverse stitch switch and ndl.
- Page 34 Original issue Service Manual May, 2014 34/38 Page Model 7285Q 17. Electronic component area -- continued -- Harnesses are connected to red framed position of CPU board Reverse side of CPU /Switch board CN10 84082 LCD Unit p.no. not used...
- Page 35 Original issue Service Manual May, 2014 35/38 Page Model 7285Q 18. Wiring diagram...
- Page 36 Original issue Service Manual May, 2014 36/38 Page Model 7285Q 19. PART LIST FOR FEED CONTROL UNIT...
- Page 37 Service Manual May, 2014 37/38 Page Model 7285Q 20. Helpful messages 1. Helpful messages for user If an incorrect operation is made, a helpful message will be display. When a helpful Message is displayed; fix the problem following the instructions below.
- Page 38 May, 2014 38/38 Page Model 7285Q 20. Helpful messages –continued— 2. Helpful messages for system errors If the machine judges there are a system error in operation, it stops operation beeping for 5 seconds and continues to display detected error, until it is turned off.