Download
Share
Print this page
Singer XL-420 Service Manual
  1. Manuals
  2. Brands
  3. Singer Manuals
  4. Sewing Machine
  5. XL-420
  6. Service manual

Singer XL-420 Service Manual

Hide thumbs Also See for XL-420:

Advertisement

Quick Links

Download this manual
Original issue
Service Manual
May 2014
Page 1／64
Model
XL-420
| 1
XL-420
First issue: May, 2014

Advertisement

loading

Related Manuals for Singer XL-420

Summary of Contents for Singer XL-420

  • Page 1 Original issue Service Manual May 2014 Page 1／64 Model XL-420 XL-420 First issue: May, 2014...
  • Page 2 Original issue Service Manual May 2014 Page 2／64 Model Contents XL-420 Disassembling covers SEC.1 Test mode with warning function deactivated SEC.2 Needle clearance to shuttle SEC.3 Alignment of needle plate to shuttle SEC.4 Presser foot height and direction SEC.5 Origin point positioning of zigzag bight SEC.6...
  • Page 3 Original issue Service Manual May 2014 Page 3／64 Model XL-420 SEC.1-1 Disassembling covers (1) Ａ．Disassembling face cover Pull out cap (not shown) in the center and remove screw. 2. Loosen the screw behind. 3. Remove face cover Ｂ．Disassembling bed cover...
  • Page 4 Original issue Service Manual May 2014 Page 4／64 Model XL-420 SEC.1-2 Disassembling covers (2) 2. Loosen M4 screw. 3. Slide out bed cover. Ｃ．Disassembling bobbin winder unit. 1. Remove M3 screw at bobbin winding latch. 2. Remove bobbin winding latch.
  • Page 5 Original issue Service Manual May 2014 Page 5／64 Model XL-420 SEC.1-3 Disassembling covers (3) 3. Remove M4 screw at bobbin winder cover. 4. Remove two hooks at the side of the cover from rear cover. Ｄ．Removing switch cover １．Removing M4 screws at the side of the cover.
  • Page 6 Original issue Service Manual May 2014 Page 6／64 Model XL-420 SEC.1-4 Disassembling covers (4) ２．Remove switch cover. Ｅ．Removing base cover １．Remove three M4 screws behind the sewing machine. ２．Lay the machine and remove two M3 tapping screws.
  • Page 7 Original issue Service Manual May 2014 Page 7／64 Model XL-420 SEC.1-5 Disassembling covers (5) ３．Remove two M4 screws on the right. ４．Remove two M4 screws on the center. Ｆ．Remove front and rear covers. 1. Remove two M4 tapping screws near the handle at the top of rear...
  • Page 8 Original issue Service Manual May 2014 Page 8／64 Model XL-420 SEC.1-6 Disassembling covers (6) 2. Remove M4 screw at rear cover. 3. Remove M3 screw and washer at the front cover. You can only loosen a screw but if you do so, be careful of a position of washer when re-assembling.
  • Page 9 Original issue Service Manual May 2014 Page 9／64 Model XL-420 SEC.1-7 Disassembling covers (7) Ａ Ｂ Ｂ Ｃ Ｃ 5. Insert small screw driver into clearance between front and rear covers and then lift up the front cover to remove two covers as shown at left.
  • Page 10 Original issue Service Manual May 2014 Page 10／64 Model XL-420 SEC.1-8 Disassembling covers (8) | 10 7. Lower the presser foot lever and then remove rear cover by lifting up and passing it under the presser foot taking care not to interfere with each other.
  • Page 11 Original issue Service Manual May 2014 Page 11／64 Model XL-420 SEC.2 Test mode with warning function deactivated | 11 This test mode is used to operate machine without threading, while sensors for thread breakage, presser foot lever and bobbin thread are deactivated.
  • Page 12 Model SEC.3-1 Needle clearance to shuttle (1) XL-420 | 12 Note: Select any of stitch number 33 to 36 and then set Zigzag width to the maximum of 7mm and then check needle clearance to shuttle at both left and right sides of needle positions.
  • Page 13 Original issue Service Manual May 2014 Page 13／64 Model XL-420 SEC.3-2 Needle clearance to shuttle (2) | 13 2． If needle clearance to shuttle at right and left position is not same, adjust position of fulcrum (B) for needle swing support.
  • Page 14 Original issue Service Manual May 2014 Page 14／64 Model XL-420 SEC.4 Alignment of needle plate to shuttle | 14 Checking 1. After adjusting needle clearance to shuttle, attach needle plate. At this time, make sure to check the needle is correctly positioned to the needle hole as shown below.
  • Page 15 Original issue Service Manual May 2014 Page 15／64 Model XL-420 SEC.5-1 Presser foot height and direction (1) | 15 Checking-1 Lower the feed dog below the needle plate. Raise the presser foot lever. Check and see if clearance between needle plate and presser foot is about 5.6 mm.
  • Page 16 Original issue Service Manual May 2014 Page 16／64 Model XL-420 SEC.5-2 Presser foot height and direction (2) Adjustment-1 | 16 1． Remove the face cover, and set the feed-dog at down position. 2． Lower the presser foot lever. 3． Loosen screw (B) through hole (A) by using hexagon socket screw driver (2mm).
  • Page 17 Original issue Service Manual May 2014 Page 17／64 Model XL-420 SEC.5-3 Presser foot height and direction (3) Adjustment-2 | 17  When needle ditch on the presser foot and needle hole at the needle plate do not match towards fabric feed direction.
  • Page 18 May 2014 Page 18／64 Model SEC.5-4 Presser foot height and direction (4) XL-420 Adjustment-3 | 18  When the presser foot and ditch of feed dog on the needle plate is not equally balanced to left and right direction 1. Loosen 3 screws at F, G and H at rear part of board (E).
  • Page 19 Original issue Service Manual May 2014 Page 19／64 Model XL-420 SEC.6-1 Origin point positioning of zigzag bight | 19 Adjustment: 1. Turn off the main power and remove face cover. 2. Loosen two screws (1&2) fixing pinion gear by rotating pinion gear (A). Position of screw (1) and screw (2) will be located as shown in fig.
  • Page 20 Original issue Service Manual May 2014 Page 20／64 Model XL-420 SEC.6-2 Origin point positioning of zigzag bight (2) | 20 Checking (2): Turn on the machine and set at straight stitch. Loosen screw (2) by using hexagon socket screw 1.5 at the Zigzag gear lever (D) and rotate eccentric axis (3) in either direction to find a position of eccentric axis located on the right and fix it.
  • Page 21 Original issue Service Manual May 2014 Page 21／64 Model XL-420 SEC.7-1 Needle bar height (1) | 21 Checking: Turn on the machine, Select straight stitch at center needle position. Remove presser foot and needle plate, and then remove bobbin case.
  • Page 22 Original issue Service Manual May 2014 Page 22／64 Model XL-420 SEC.7-2 Needle bar height (2) Adjustment: | 22 Remove face cover. Loosen hexagonal socket screw (1) and adjust needle bar height. Tighten the screw securely after adjustment. Needle bar Check to see if needle threader operates correctly and there is not interference in vertical...
  • Page 23 Original issue Service Manual May 2014 Page 23／64 Model XL-420 SEC.8-1 Needle threader height (1) | 23 Checking 1. Raise needle to its highest position by turning hand wheel toward you. 2. Lowering needle threader lever, check and see if hook is inserted into needle hole.
  • Page 24 Original issue Service Manual May 2014 Page 24／64 Model XL-420 SEC.8-2 Needle threader height (2) | 24 Adjustment 1. Remove face cover. 2. Turning hand wheel by hand, raise needle bar to its highest position. 3. Loosen screw (C) of threader stopper (B).
  • Page 25 Original issue Service Manual May 2014 Page 25／64 Model XL-420 SEC.8-3 Needle threader height (3) | 25 7. If the direction of insert hook is deviated from correct position, adjust the hook position with the small screw driver in the accessory.
  • Page 26 Original issue Service Manual May 2014 Page 26／64 Model XL-420 SEC.8-4 Needle threader height (4) | 26 Remove screw (K) and outer pipe (J). Pull down the threading lever to its lowest position. Check and see if hook protrudes approx. 1.5mm from needle.
  • Page 27 Original issue Service Manual May 2014 Page 27／64 Model XL-420 SEC.8-5 Needle threader height (5) | 27 Instruction for replacing needle threader hock portion 1. Remove Outer pipe (J) 2. Remove Stopper ring (E) 3. Loosen the lower part of nut by 4.
  • Page 28 Original issue Service Manual May 2014 Page 28／64 Model XL-420 SEC.8-6 Needle threader height (6) | 28 9. If twin thread guide (H) is located much higher or lower than hook portion, needle is not threaded. After checking hook position, adjust position of outer pipe (J) so that there may be a clearance 0.4 to 0.6 mm between screw (K) and bottom of long hole.
  • Page 29 Original issue Service Manual May 2014 Page 29／64 Model XL-420 SEC.9 Adjustment of feed dog height Checking: | 29 1. Move feed dog to its highest position by turning hand wheel. Check to see if feed dog height is as illustrated below.
  • Page 30 Original issue Service Manual May 2014 Page 30／64 Model XL-420 SEC.10 Tension for timing belt | 30 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 31 Original issue Service Manual May 2014 Page 31／64 Model XL-420 SEC.11 Needle timing for feed dog Note: After adjustment, be sure to follow “Needle timing to shuttle”. | 31 As horizontal and vertical feed motion is unitized on this model, adjustment of feed timing is...
  • Page 32 Original issue Service Manual May 2014 Page 32／64 Model XL-420 SEC.12-1 Needle timing to shuttle hook (1) | 32 Check “Feed timing (vertical movement)” and “Needle height” beforehand. Checking 1. Select any of stitch number 33 to 36 and then set Zigzag width to the maximum of 7mm.
  • Page 33 Original issue Service Manual May 2014 Page 33／64 Model XL-420 SEC.12-2 Needle timing to shuttle hook (2) | 33 Meshing condition of shuttle race gear and lower shaft gear 1. Check meshing condition of gears after adjustment. Check play of the gear at 4 positions –each 90 degree angle of 1 rotation of shuttle race.
  • Page 34 May 2014 Page 34／64 Model SEC.13-1 Adjustment of timing of take-up lever to XL-420 shuttle (1)  Make sure to adjust needle timing of shuttle after this adjustment. | 34 Checking 1. Thread through thread guide of take-up lever and then move the take-up lever to the position where tip of the lever may catch thread.
  • Page 35 Service Manual May 2014 Page 35／64 Model SEC.13-2 Adjustment of timing of take-up lever to XL-420 shuttle (2) | 35 Adjustment 1. Remove front cover. 2. Loosen two hex screws on main shaft gear (A) which is engaged with take-up operating gear (B).
  • Page 36 May 2014 Page 36／64 Model SEC.14 Adjustment of meshing position of gears XL-420 for take-up lever Checking | 36 1. If excessive noise is generated from take-up lever, there should be a problem in meshing of take-up operating gear (A) with main shaft gear.
  • Page 37 Original issue Service Manual May 2014 Page 37／64 Model XL-420 SEC.15 Retaining bracket for bobbin case 1. Remove needle plate and bobbin case. | 37 2. Check to see if lower side of plate spring and lower side of projection (A) of bobbin case align with alignment line D as illustrated below.
  • Page 38 Original issue Service Manual May 2014 Page 38／64 Model XL-420 SEC.16 Origin point positioning of feed “zero” Adjustment: | 38 1. Remove front cover. 2. Turn off main power. Loosen screw (1) and (2) at pinion gear (A) which is fixed with stepping motor axis for feeding.
  • Page 39 May 2014 Page 39／64 Model SEC.17-1 Stitch length (1） XL-420 | 39 Adjustment 1. Set machine at “Button sewing” or “Zero feed” 2. Loosen fixing bolt (A) on motor bracket using hexagon socket screw driver 2.5. 3. Turn position adjusting bolt (B) on motor bracket in either direction using hexagon socket screw driver 3.0 running machine with a little thick paper placed under presser...
  • Page 40 Original issue Service Manual May 2014 Page 40／64 Model XL-420 SEC.17-2 Stitch length (2） Adjustment: | 40  This is a case of adjusting stitch length without front cover removed but with only base plate removed. 1. Remove base plate.
  • Page 41 Original issue Service Manual May 2014 Page 41／64 Model XL-420 SEC.18-1 Ajustment of upper thread tension (1) | 41 Checking 1. Remove face cover 2. Remove adjustment dial (A). Making sure to remember the default “S” position 3. Rotate Knurled part (B) to adjust tension to be set. Standard is 55-65gr at “S” position.
  • Page 42 Original issue Service Manual May 2014 Page 42／64 Model XL-420 SEC.18-2 Ajustment of upper thread tension (2) | 42 4. Fit the dial to knurled part after adjustment. It is needed to fit the dial at same position as it used to be.
  • Page 43 Original issue Service Manual May 2014 Page 43／64 Model XL-420 SEC.19 Adjustment of CAM sensor | 43 Zigzag timing of needle is controlled by sensor cam and sensor located on main shaft. Adjustment: 1. Loosen two screws (1& 2) on collar (A) fixing sensor cam.
  • Page 44 Original issue Service Manual May 2014 Page 44／64 Model XL-420 SEC.20-1 Check the Knee Lifter (1) | 44 Adjustment 1. Remove front cover and back cover. And remove AC board.(picture.1) 2. Loosen two screws (A) at the picture 2. If the screws (A) are loosened, lever (B) will be pulled up due to spring.
  • Page 45 Original issue Service Manual May 2014 Page 45／64 Model XL-420 SEC.20-2 Check the Knee Lifter (1) | 45 3．The parts (E) and (F) can be tightened by screw (G) at the center of oblong hole. And regarding the parts (F), keep tilling up about 10 degrees from a vertical line and tighten two screws (H,J).
  • Page 46 Original issue Service Manual May 2014 Page 46／64 Model XL-420 SEC.21-1 Sewing machine test mode (1) | 46 Put bobbin onto bobbin winder shaft. Set bobbin winder latch. Press and hold the “Reverse button”. Turn off the machine on this condition above Release bobbin winder latch and “reverse button”, when you see sand clock...
  • Page 47 Service Manual May 2014 Page 47／64 Model SEC.21-2 Sewing machine test mode (2) XL-420 ＊If embroidery unit is attached, this will be a test mode for embroidery unit. | 47 No.7 Contents of Test mode Mode 1 Needle position：LeftCenterRightLeft Feed：Zero Mode 2 Needle position：Center...
  • Page 48 Original issue Service Manual May 2014 Page 48／64 Model XL-420 SEC.22-1  Removing top cover and carriage cover of embroidery unit (1) | 48 Removing top cover 1. Lay embroidery unit upside down and then remove accessory drawer and three tapping screws at drawer side (1, 2, 3,4 and5). And also remove another four screws...
  • Page 49 Original issue Service Manual May 2014 Page 49／64 Model SEC.22-2 Removing top cover and carriage cover XL-420 of embroidery unit (2) | 49...
  • Page 50 May 2014 Page 50／64 Model SEC.22-3 Removing top cover and carriage cover XL-420 of embroidery unit (3) Removing carriage cover | 50 1. Remove a screw on side of carriage cover. 2. Remove two screws on the back of carriage cover.
  • Page 51 May 2014 Page 51／64 Model SEC.23 Adjustment of stop position of XL-420 embroidery carriage along X & Y axis | 51 Adjustment: X axis 1. Loosen screw (1) and adjust position of braking plate (B) which passes through sensor (A). Then check the position again.
  • Page 52 Original issue Service Manual May 2014 Page 52／64 Model XL-420 SEC.24-1 Embroidery unit test mode | 52 Same setting in SEC.21 is needed to operate embroidery unit test mode. Contents of test mode Mode1 Move to original point Mode2 Move diagonal from upper rightlower left, and stop.
  • Page 53 Original issue Service Manual May 2014 Page 53／64 Model XL-420 SEC.24-2 Embroidery unit test mode | 53 Mode2 Mode1 Mode4 Mode3 Mode8 Mode6 Mode7 Mode5...
  • Page 54 Original issue Service Manual May 2014 Page 54／64 Model XL-420 SEC.25-1 Trouble contents with LED on panel (1) | 54...
  • Page 55 Original issue Service Manual May 2014 Page 55／64 Model XL-420 SEC.25-2 Trouble contents with LED on panel (2) | 55...
  • Page 56 Original issue Service Manual May 2014 Page 56／64 Model XL-420 SEC.25-3 Trouble contents with LED on panel (3) | 56 Name of al code Way of detect Solution If exceed amount of electric current has followed to bobbin winder motor more than...
  • Page 57 Original issue Service Manual May 2014 Page 57／64 Model XL-420 SEC.25-4 Trouble contents with LED on panel (4) | 57 Name of al Way of detect Solution code Replace switch of HP signal is not turn to "ON" at initial movement...
  • Page 58 Original issue Service Manual May 2014 Page 58／64 Model XL-420 SEC.25-5 Trouble contents on display (5) | 58 Name of al Way of detect Solution code Problem in Hoop movement Needle position became lower position before The embroidery data is...
  • Page 59 Original issue Service Manual May 2014 Page 59／64 Model XL-420 SEC.26-1 Wiring diagram (part1) CPU circuit board | 59...
  • Page 60 Original issue Service Manual May 2014 Page 60／64 Model XL-420 SEC.26-2 Wiring diagram (part2) | 60...
  • Page 61 Original issue Service Manual May 2014 Page 61／64 Model SEC.27-1 Main circuit board and functions of each XL-420 connector (1) | 61 CN17 CN16 CN18 CN15 CN19 CN14 CN13 CN20 CN12 CN11 CN10...
  • Page 62 Original issue Service Manual May 2014 Page 62／64 Model SEC.27-2 Main circuit board and functions of each XL-420 connector (2) | 62 AC circuit board Main motor Step motor for needle zigzag with lever switch Not use Not use Step motor for feed material with lever switch...
  • Page 63 Original issue Service Manual May 2014 Page 63／64 Model SEC.27-3 Main circuit board and functions of each XL-420 connector (3) | 63 Control switch panel circuit board Operation Switch-panel (start/stop) Speed control CPU board...
  • Page 64 Original issue Service Manual May 2014 Page 64／64 Model SEC.27-4 Main circuit board and functions of each XL-420 connector (4) | 64 Power supply circuit board (AC board) CPU circuit board Power switch...