SERVICE MANUAL
Contents
1. KEYN O EL C DSI pe N dci PU position sensor se Een AN Zico seco A lise unn PRO Bre Start stop LED Ga P Ts ee I Seem T ERN BEN d DER nr EL yf an Botton hole sensor SW io DERE RST QN PES amt z EA 0 8 ms 3 a Fm tet AN fal ono dae e S E N Td ss se eem TS ETENE fa ORE Button hole sensor CEE per CPU PCB K Een 1 Td crm P N 84130 Perms i Helens Gap T xe Erw Tn s deseos 7 E EA Yate lt r S EN a TTT Es BEIM Es Ese 7 SN rss Esos R Xp ses Er 0560 SN P ET our R BST 95 nasa 2 ED speres RE SE PIER 1 essere 0520442845 c 28FE ST VK N FFC TU CN3 CN4 SW control board K 65 K 85 A3963WV2 2P A3963WV2 5P CO P N 84123 84124 LED LAMP 22P vH ibo vt E i LD Kap D BES ren 4 Ln Reg O EETA O Ara A2502WV2 2P anga 1 Transformer 100 120V and 200 230V PLEO A iens P N 87514 87509 87519 LL USS o B T A39863WV2 3P D FAAN B2P3 VH ite AC PCB 100 120V 200 230V is P N 84120 84125 ue s Tr o Ema p ha Power supply 2 no II CND B2P3 VH BK A3963WV2 4P Main motor O O T N B4P VH2. Model Sec 16 Origin point positioning of Zigzag bight Revised TA This section is to explain how to restore meshing position of pinion gear and operation gear of step motor for zigzag bight 1 Remove face and front covers 2 When mesh gear a with pinion gear b concave holes are meshed at the positio where they face each other as shown below 3 Loosen two screws fixing pinion of step motor onto motor shaft 4 Turn on the machine and set test mode at 06 see section 02 LED light of zigzag adjustment switch on operation panel is lit Concave hole Step motor is energized in this position Concave hole Push start switch a few times for confirmation 5 Holding this situation turn the pinion gear b fully clockwise until the projection c touches with rotation stopper d and tighten the screw on the pinion gear Date 2011 09 23 Rev 2012 02 14 Page 40 42 SERVICE MANUAL Model SEC 17 Origin point positioning of stitch length Revised KERK This section is to explain how to restore meshing position of pinion gear and operation gear of step motor for feed 1 Remove face and front covers 2 When mesh gear a with pinion gear b concave holes are meshed at the position where they face each other as shown below 3 Loosen two screws fixing pinion of step motor onto motor shaft 4 Turn on the machine and set test mode at 06 see section 02 Push stitch length adjustment switch on operati
3. to adjust position of needle Turn to clockwise direction needle moves to left side Turn to counter clockwise direction needle moves to right side 3 After adjustment secure screw a SERVICE MANUAL Page 26 42 Model SEC 08 Clearance between needle and shuttle Note Set machine at test mode and select test mode 1 for needle at L C R positions Make this checking before checking Needle timing to shuttle Checking 1 Remove needle plate bobbin case and face cover 2 Shift shuttle hook at the rear of needle by turning hand wheel Check to see if needle clearance to shuttle is within 0 05 to 0 15 mm 0 05 0 15mm 0 05 0 15mm TN 9 NU At right position Adjustment 1 Turn screw a to either direction as illustrated and adjust needle position by moving support shaft back and forth To decrease clearance turn screw to counter clockwise Note Set machine at test mode and select test mode 1 for needle at L C R Date 2011 09 23 SERVICE MANUAL 21142 Model K65 amp K85 2 If needle clearance to shuttle at right and left position is not same adjust position of fulcrum b for needle swing support Loosen two screws c located under bottom of support plate and adjust position of fulcrum b If it touches at right side adjust position of fulcrum b for needle swing support to the left If needle touches with shuttle at left side adjust position of fulcrum b for need
4. 7 Lift the machine and remove screws on needle plate Date 2011 09 23 SERVICE MANUAL 6 42 Model E 10 Remove screw on rear cover 11 Remover screw on rear cover which is located near face cover 12 Remover cover fixing screw near face cover y Date 2011 09 23 SERVICE MANUAL 7 42 Model ist 13 Lift the rear cover using screw driver and remove projection of the cover from machine body lamad 14 Remover the rear cover 15 Remover screw from top cover rr Date 2011 09 23 SERVICE MANUAL Page Model MARS B 16 Remove fixing screw inside the top cover Photo is left side Lamp cover side view 7009 p y a m i mm 9 Foot of top cover SERVICE MANUAL 9 42 Model K65 amp K85 Lift the top cover at the side of face cover 3 Remove the top cover by lifting it at the same time Date 2011 09 23 SERVICE MANUAL lt Model ist 19 Loosen screw of front cover at the side of hand wheel so that it may make it easier to re assemble it a Date 2011 09 23 SERVICE MANUAL 11 42 Model it 21 Remove screw of front cover at the side of hand wheel 22 Remove tapping screw at needle bar as shown ete Date 2011 09 23 12 42 Model 5 23 Remove flat cable connected with circuit board from AC circuit board 24 Remove the front cover from machine
5. span polyester thread No 60 and tension gauge Date 2011 09 23 Rev 2012 02 14 35 42 Model K65 amp K85 4 Insert the inner dial b into place after adjustment Fix wall portion h of the inner dial into position where it is around opposite side of pipe knock pin e pU Though tension value may be deviated a little from the one adjusted on section 3 Re adjust it in last step 5 Outside surface of inner dial b is knurled and inside surface of outer dial a is partly knurled The knurled portions of both dials are meshed each other E 0 Knurled portion Date 2011 09 23 SERVICE MANUAL ing Model 5 6 Make sure where indicator of the front cover is to be positioned on thread guide plate beforehand Insert the outer dial a so that the center position may be aligned wit indicator on front cover 7 Re confirm tension value using the tension gauge in the position above If adjustment is needed slide the outer dial a to outside to release knurled portion and turn it either way and mesh it again After adjustment is completed insert plate spring f into V groove on the outer dial a and tighten screw securely This position is the one for the indicator of the front cover Date 2011 09 23 Rev 2012 02 14 SERVICE MANUAL E Model SEC 14 Retaining bracket for bobbin case Revised 1 Remove needle plate 2 Loosen screws a amp b and adjust the p
6. CE MANUAL Page 30 42 E Model SEC 10 Needle timing to shuttle K65 amp K85 Check Feed timing vertical movement and Needle height beforehand Checking 1 Set machine at test mode and select mode 1 2 Remove needle plate Check to see if needle is not bent 3 Move needle to left position by turning hand wheel Raise needle from its lowest position slowly and check if distance is as illustrated below when point of shuttle hook aligns with right side of needle Needle plate point of shuttle hook Shuttle race 0 5 to 1 2 Adjustment 1 Remove front cover and bottom cover Remove Drop feed control unit a by removing two screws a amp b on shuttle base SERVICE MANUAL Page 31 42 Model K65 amp K85 2 While needle is placed around the lower area loosen a screw but not the one d which can be touched for adjustment Holding this position adjust needle timing shuttle by turning hand wheel with a tool inserted into the screw hole as illustrated below wo Eo Ls ES 3 Check to see if the distance is correct as illustrated above Tighten two screws securely after adjustment Date 2011 09 23 Rev 2012 02 14 Page SERVICE MANUAL Model SEC 11 Meshing condition of shuttle gear and lower 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 No play on 2 position
7. SERVICE MANUAL nu C Model K65 amp K85 alli HZL K85 65 Original issued Sept 2011 Revesed Feb 2012 SERVICE MANUAL Page 2 42 Model CONTENTS K65 amp K85 SEC 01 Disassembling outer covers SEC 02 Test mode SEC 03 Adjustment of feed dog height Revised SEC 04 Needle bar height SEC 05 Needle threader height SEC 06 Presser foot height SEC 07 Needle position SEC 08 Clearance between needle and shuttle hook SEC 09 Needle timing to feed dog Revised SEC 10 Needle timing to shuttle SEC 11 Meshing condition of shuttle gear and lower gear SEC 12 Motor belt tension Addition SEC 13 Adjustment of thread tension SEC 14 Retaining bracket for bobbin case Revised SEC 15 Stitch balance Addition SEC 16 Origin point positioning of zigzag bight Revised SEC 17 Origin point positioning of stitch length Revised SEC 18 Electrical components SEC 19 Wiring diagram Date 2011 09 23 SERVICE MANUAL Pago Model SEC 01 Disassembling outer covers 1 Lay the machine on its back 2 Remove screw for rubber feet 3 Remove rubber foot for adjustment by hand Lg u c Date 2011 09 23 SERVICE MANUAL Page Model MARS 4 Remove base cover Date 2011 09 23 SERVICE MANUAL 5 42 Model E
8. body Date 2011 09 23 SERVICE MANUAL Page Model Move bobbin winder shaft to operating position Press and hold the Reverse button Turn on sewing machine Date 2011 09 23 Rev 2012 02 14 nw SERVICE MANUAL Ee K65 amp K85 Model K65 Release bobbin winder shaft by the time when LED of pattern select button 1s lit at lowest line FTTTI JDEBE Release bobbin winder shaft by the time when LED display is lit at 00 as illustrate below DS ils ol AVS SERVICE MANUAL Page 15 42 Model K65 amp K85 Function Zero feed three needle positions L C R Test mode 2 K65 gt 2 K85 gt 01 Function Zero feed center needle position Test mode 3 K65 3 K85 02 Function 2mm feed center position 11stitches forward and back ward Test mode 4 K65 gt 4 K85 gt 103 Function repeat 4mm feed forward and 3mm feed backward three needle positions L C R Test mode 5 K65 5 K85 104 Function stitch Darning pattern Model K65 Model K85 BEN MEN Date 2011 09 23 SERVICE MANUAL 16 42 Model 5 Function origin point positioning of zigzag bight and stitch length Zigzag width manual adjustment button LED lit when select 6 button first For origin point positioning of stitch length push stitch length manual adjustment button Model K65 Model K85 SERVICE MANUAL Page 17 42 Model SEC 03 Adjustment of feed dog height Rev
9. eedle bar height K65 amp K85 Note Make this checking before checking Needle timing to shuttle and Feed dog timing vertical motion Use needle 90 14 Checking 1 Select straight stitch at center needle position 2 Remove presser foot and needle plate and then remove bobbin case 3 Replace needle with special needle gauge L 29 mm 4 Lower the needle gauge to its lowest position by turning hand wheel by hand Check to see if the bottom of the needle gauge aligns with shuttle race pushing the needle lightly as shown by arrow mark Lowest position of Needle gauge Shuttle race Adjustment 1 Remove face cover 2 Loosen screw a of needle bar clamp using hex screw driver and adjust the height of needle bar Date 2011 09 23 SERVICE MANUAL 21 42 Model ist 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 vertical movement of needle bar SERVICE MANUAL L CM i Model SEC 05 Needle threader height Cheking 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 t E 9 Adjustment 1 Remove face cover Turning hand wheel by hand raise needle bar t
10. ised K65 amp K85 Checking 1 Setstitch length at zero feed 2 Move feed dog to its highest position by turning hand wheel Check to see if feed dog height is as illustrated below Adjustment 1 Remove needle plate and remove bottom cover Open front cover and back cover Adjust feed dog with reference photo for vertical movement below Note When turning screw use driver only Mounting bracket of feed dog Viewing from back side Date 2011 09 23 SERVICE MANUAL am oo Se T Revised K65 amp K85 Open front cover and back cover as shown below for adjustment of screw a Move feed dog to its highest position by turning hand wheel Loosen screw a to get gap between end b of screw a and vertical movement control cam 1 c The gap is more than 0 5mm enough Viewing cam amp screw from back side of machine Adjust the height of feed dog by turning screw d at side of vertical movement control cam2 f until the height of feed dog obtains correct position Viewing cam amp screw from back side of machine SERVICE MANUAL Page 19 42 Model Revised K65 amp K85 After adjustment screw d turning screw a until end b of screw a touches to control cam c at highest position of feed dog and under this condition loosen screw a about 45 degrees in reverse direction for obtaining gap Date 2011 09 23 Rev 2012 02 14 Page SERVICE MANUAL Model SEC 04 N
11. le swing support to the right 3 After adjustment tighten two screws c securely SERVICE MANUAL Page 28 42 Model SEC 09 Needle timing to feed dog Revised K65 amp K85 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 Set stitch length at maximum feed pitch 2 Lower needle bar to needle plate and stop it when top of feed dog comes up to surface of needle plate 3 At this condition check to see if distance between end of thread hole of needle and the surface of needle plate is within zero to 1 8mm Feed dog 1 Loosen one of two screws b of timing belt gear a on main shaft Adjustment Turn hand wheel by hand and stop it when needle arrives at the surface of needle plate mentioned above Holding this position loosen the other screw so that the gear may be perfectly freed from the main shaft SERVICE MANUAL Page 29 42 Model K65 amp K85 Revised 3 Holding such condition turn belt gear at the side of lower shaft by hand so that teeth of feed dog may be at the same level of needle plate Holding this position tighten one of screws of belt gear on the main shaft 4 Turning the machine by hand check to see if feed timing is approximately as explained above 5 Tighten two screws b on the belt gear securely after adjustment SERVI
12. o its highest position Loosen screw a of threader stopper b Insert hook into the upper side of needle hole moving the needle bar c While holding the above situation tighten the screw a attaching the threader stopper onto stopper pin d oF N 90 14 80 11 70 9 Insert the hook into the Hook upper side of needle hole SERVICE MANUAL L CM m Model K65 amp K85 C 7 f the direction of insert hook is deviated from correct position adjust the hook position with the small screw driver in the accessory hh Correct Date 2011 09 23 SERVICE MANUAL ine Model SEC 06 Presser foot height Checking 1 Lower the feed dog below the needle plate 2 Raise the presser foot lever 3 Check and see if clearance between needle plate and presser foot is about 5 6 mm Adjustment 1 Remove the face cover and raise the presser foot lever 2 Loosen the screw a and adjust the presser foot height moving the presser bar 3 Tighten the screw securely after checking the presser foot is parallel with the holes for feed dog on the needle plate Date 2011 09 23 Rev 2012 02 14 Page SERVICE MANUAL Model SCE 07 Needle position K65 amp K85 Checking 1 Set test mode at 2 2 Turn hand wheel by hand and see if the position of needle is at center of needle hole on needle plate Adjustment 1 Remove face cover 2 Loosen screw a and turn plastic nut b
13. on panel and confirm if LED is lit Step motor is energized in this position Push start switch a few times for confirmation 4 Holding this situation turn the pinion gear b fully clockwise until the projection c touches with rotation stopper d and tighten the screw on the pinion gear SERVICE MANUAL Co m Model SEC 18 Electronic components area List of main circuit boards for K series T 120V 230V 120V 230V 87514 87519 87514 87519 84120 84125 84120 84125 Stepping motors 85522 AC board For 100 120v For 230v SW board vr SW board For K 65 ann For K 85 ET X RT fw k bi t og 4 L i geb mm E te ant Se Le mm L L PB 1 NY i P E n tw l an i oD N TES O O T T O CN Date Rev 2012 02 14 SERVICE MANUAL Page Stepping motor for material feed Stepping motor for zigzag swing Sensor cams on main shaft Ye CO CAM3 oe Nr Nr os NI 20 EEEE FEE EE Pd N aD Y CN3 A2001WR2 3P gt Speed control S38 PH K 5 aw S spon Start stop SW m 5 4 3 2 1 Reverse stitch SW A2001WR2 6P a lt afn in windi 68 Pie S Pisas aa o 2B PHK S SA HTS amp 5 amp E SESS SW 2 KEY DEG4B SHREE SISI ra 0 9 d i250 sperm a mm TT 4 kev oeco Kev mo 24 i kevmno A2501WV2 5P A2501WV2 4P A2001WV2 5P Presser foot B voan _
14. osition of retaining bracket c until the lower side 1 of projection d of bobbin case aligns with alignment line 2 on lower side of plate spring 3 Tighten screws temporarily and then place needle plate into position check clearance between projection d of bobbin case when move bobbin case in reverse rotation Clearance is 1 to 2 mm Retainer for reverse rotation Plate spring 4 After checking clearance tighten screws securely Date 2011 09 23 Rev 2012 02 14 Page 38 42 SERVICE MANUAL Model SEC 15 Stitch balance Addition K65 amp K85 Checking 1 Check forward and backward feed balance of actual patterns under following conditions Fabric Cotton broard cloth two layers Thread Spun polyester thread 60 Actual patterns to be checked For model K 85 Pattern no 39 Chain like stitch For model K 65 Set test mode and select mode 5 Darning pattern Stitch four rows at darning pattern and check to see if the difference between ends of first row and fourth row is within 1mm J J J J J J timm gt dm C C C C C C C C Adjustment 1 Remove bottom cover for adjusting feed balance 2 Lay down the machine back and adjust screw a until feed balance is obtained Turn screw a clockwise to increase forward feed Turn screw a counter clockwise to decrease forward feed Adjustment of screw without removal of bottom SERVICE MANUAL Page 39 42
15. s to save too loose condition play on other 2 positions to save too tight condition 2 Adjustment of play between shuttle gear and lower shaft gear is made by turning eccentric ball bushing f loosen screw g on pressing plate so that the ball bushing f may be turned Turn the ball bushing f in either way by using concave portion The ball bushing is to be placed with mark h positioned at upper side within angle of 180 degrees 3 Tighten the screw C securely after adjustment SERVICE MANUAL Page 33 42 Model SEC 12 Motor belt tension Addition K65 amp K85 Adjustment 1 Remove the front cover 2 Loosen two screws and adjust belt tension so that belt maybe bent about 5 mm when it is pushed by pressure of 100g between belt pulley and motor 3 Tighten the two nuts after checking the belt tension a 4 namq Q Socket screws Move up or down motor bracket with motor until motor belt obtain correct tension Date 2011 09 23 SERVICE MANUAL i Model SEC 13 Adjustment of thread tension Adjustment of needle thread tension is explained below 1 Remove face and front covers 2 Pull out outer dial a on needle thread tension mechanism Remove star shaped plate spring c on inner dial b i E i OQ j x s bT A v A D R l 7 3 Pull out the inner dial b and turn adjustment nut d to adjust tension at approximatel 60 g using
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