JUKI HZL-K65 Service Manual Download Page 38

Page: 38 / 39

SERVICE MANUAL

Date:

2011/09/23

Page:

38/39

Model:

K65&K85

SEC. 16

Electronic components area

List of main circuit boards for K series

120V

230V

120V

230V

Transformer

87514

87519

87514

87519

CPU circuit board

Power supply circuit board

84120

84125

84120

84125

SW control circuit board

Stepping motors

K65

K85

84130

84123

84124

85522

CPU
board

AC board
For 100/120v
For 230v

SW board
For K-65

SW board
For K-85

Summary of Contents for HZL-K65

Page 1: ...SERVICE MANUAL Date 2011 09 23 Page 1 39 Model K65 K85 Original issued Sept 2011 ...

Page 2: ...t height SEC 07 Needle position SEC 08 Clearance between needle and shuttle hook SEC 09 Needle timing to feed dog SEC 10 Needle timing to shuttle SEC 11 Meshing condition of shuttle gear and lower gear SEC 12 Adjustment of thread tension SEC 13 Retaining bracket for bobbin case SEC 14 Origin point positioning of zigzag bight SEC 15 Origin point positioning of stitch length SEC 16 Electrical compon...

Page 3: ...SERVICE MANUAL Date 2011 09 23 Page 3 39 Model K65 K85 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 ...

Page 4: ...SERVICE MANUAL Date 2011 09 23 Page 4 39 Model K65 K85 4 Remove base cover 5 Remove screw for bottom cover 6 Remove the bottom cover ...

Page 5: ...SERVICE MANUAL Date 2011 09 23 Page 5 39 Model K65 K85 7 Lift the machine and remove screws on needle plate 8 Remove needle plate 9 Remove screw for face cover ...

Page 6: ...SERVICE MANUAL Date 2011 09 23 Page 6 39 Model K65 K85 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 ...

Page 7: ...VICE MANUAL Date 2011 09 23 Page 7 39 Model K65 K85 13 Lift the rear cover using screw driver and remove projection of the cover from machine body 14 Remover the rear cover 15 Remover screw from top cover ...

Page 8: ...8 39 Model K65 K85 16 Remove fixing screw inside the top cover Photo is left side Lamp cover side view 17 Position of the above screw is shown below with the top cover removed 18 Lift the top cover at side of hand wheel Foot of top cover ...

Page 9: ...SERVICE MANUAL Date 2011 09 23 Page 9 39 Model K65 K85 Lift the top cover at the side of face cover Remove the top cover by lifting it at the same time ...

Page 10: ...Date 2011 09 23 Page 10 39 Model K65 K85 19 Loosen screw of front cover at the side of hand wheel so that it may make it easier to re assemble it 20 Loosen screw of fixing foot of front cover at the side of hand wheel ...

Page 11: ...SERVICE MANUAL Date 2011 09 23 Page 11 39 Model K65 K85 21 Remove screw of front cover at the side of hand wheel 22 Remove tapping screw at needle bar as shown ...

Page 12: ...SERVICE MANUAL Date 2011 09 23 Page 12 39 Model K65 K85 23 Remove flat cable connected with circuit board from AC circuit board 24 Remove the front cover from machine body ...

Page 13: ...SERVICE MANUAL Date 2011 09 23 Page 13 39 Model K65 K85 SEC 02 Test mode Move bobbin winder shaft to operating position Press and hold the Reverse button Turn on sewing machine ...

Page 14: ... Page 14 39 Model K65 K85 Model K65 Release bobbin winder shaft by the time when LED of pattern select button is lit at lowest line Model K85 Release bobbin winder shaft by the time when LED display is lit at 00 as illustrate below ...

Page 15: ...feed center needle position Test mode 3 Function 2mm feed center position 11stitches forward and back ward Test mode 4 Function repeat 4mm feed forward and 3mm feed backward three needle positions L C R Test mode 5 Function stitch Darning pattern K65 K85 00 1 Model K85 Model K65 1 2 3 4 5 6 K65 K85 01 2 K65 K85 02 3 K65 K85 03 4 K65 K85 04 5 ...

Page 16: ... 6 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 K85 Model K65 K65 K85 05 6 ...

Page 17: ...e 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 Remove bottom cover Adjust feed dog with reference photo for vertical movement below Note When turning screw use driver only 0 9 1 1 mm Viewing from back side b c d e Mounting bracket of feed dog ...

Page 18: ...front cover and back cover as shown below for adjustment of screw d Adjust the height of feed dog by turning screw d at side of vertical movement control cam2 e until the height of feed dog obtains correct position After adjustment screw d be sure that gap between end b of screw a and vertical movement control cam 1 c is 0 1mm a b c b d e c b 0 1mm ...

Page 19: ... 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 Adjustment 1 Remove face cover 2 Loosen screw a of needle bar clamp using hex screw driver and adjust the h...

Page 20: ...e 20 39 Model K65 K85 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 a ...

Page 21: ...le threader lever check and see if hook is inserted into needle hole Adjustment 1 Remove face cover 2 Turning hand wheel by hand raise needle bar to its highest position 3 Loosen screw a of threader stopper b 4 Insert hook into the upper side of needle hole moving the needle bar c 5 While holding the above situation tighten the screw a attaching the threader stopper onto stopper pin d Insert the h...

Page 22: ...E MANUAL Date 2011 09 23 Page 22 39 Model K65 K85 7 If the direction of insert hook is deviated from correct position adjust the hook position with the small screw driver in the accessory d a c b Correct a c ...

Page 23: ...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 6 mm a ...

Page 24: ...d 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 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 a b ...

Page 25: ...ecking 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 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 mod...

Page 26: ...swing support Loosen two screws c located under bottom of support plate and adjust position of fulcrum b 3 After adjustment tighten two screws c securely b b C C b b If needle touches with shuttle at left side adjust position of fulcrum b for needle swing support to the right If it touches at right side adjust position of fulcrum b for needle swing support to the left ...

Page 27: ...l 2 Check to see if feed dog starts to move when needle starts to go down by turning hand wheel towards you Adjustment 1 Turn off the machine with feed amount set at maximum for adjustment 2 Loosen one of two screws b of timing belt gear a on main shaft Turn hand wheel by hand and stop it when needle tip arrives at the surface of needle plate Holding this position loosen the other screw so that th...

Page 28: ...r 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 ...

Page 29: ...e 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 Adjustment 1 Remove front cover and bottom cover Remove Drop feed control unit a by removing two screws a b on shuttle base 0 5 to 1 2 Needle plate Shuttle rac...

Page 30: ...en 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 3 Check to see if the distance is correct as illustrated above Tighten two screws securely after adjustment e ...

Page 31: ...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 with...

Page 32: ... 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 3 Pull out the inner dial b and turn adjustment nut d to adjust tension at approximately 60 g using span polyester thread No 60 and tension gauge a b c d ...

Page 33: ...nto position where it is around opposite side of pipe knock pin e 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 Knurled portion e b h ...

Page 34: ... aligned with 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...

Page 35: ...rew a b and adjust the position of retaining bracket until the projection c of bobbin case can be positioned against the plate spring 3 Place needle plate into position check clearance between projection of bobbin case when move bobbin case in reverse rotation Clearance is 1 to 2 mm Retainer for reverse rotation c Plate spring a b ...

Page 36: ... bight adjustment switch on operation panel and confirm if LED is lit 3 Loosen two screws fixing pinion of step motor onto motor shaft There is a dent on the pinion gear b as well as on operation gear a These dents are meshed at the position where they face each other Step motor is energized in this position Push start switch a few times for confirmation 4 Holding this situation turn the pinion ge...

Page 37: ...h feed adjustment switch on operation panel and confirm if LED is lit 6 Loosen two screws fixing pinion of step motor onto motor shaft There is a dent on the pinion gear b as well as on operation gear a These dents are meshed at the position where they face each other Step motor is energized in this position Push switch a few times for confirmation 4 Holding this situation turn the pinion gear b f...

Page 38: ... circuit boards for K series 120V 230V 120V 230V Transformer 87514 87519 87514 87519 CPU circuit board Power supply circuit board 84120 84125 84120 84125 SW control circuit board Stepping motors K65 K85 84130 84123 84124 85522 CPU board AC board For 100 120v For 230v SW board For K 65 SW board For K 85 ...

Page 39: ...SERVICE MANUAL Date 2011 09 23 Page 39 39 Model K65 K85 SEC 17 Wiring diagram ...

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