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SEWING MACHINE

MODEL DC5100

CONDITION

CAUSE

HOW TO FIX

REFERENCE

3. BREAKING

UPPER

THREAD

1. INITIAL SEWING SPEED IS

TOO FAST.

2. THREAD PATH IS INCORRECT.

3. NEEDLE IS BENT OR DULL.

4. UPPER THREAD TENSION IS

TOO STRONG.

5. NEEDLE SIZE IS

INAPPROPRIATE FOR FABRIC.

6. NEEDLE EYE IS WORN.

7. NEEDLE HOLE IN NEEDLE

PLATE IS WORN OR BURRED.

START WITH MEDIUM SPEED.

USE THE PROPER THREAD PATH.

REPLACE WITH A NEW NEEDLE.

ADJUST NEEDLE THREAD TENSION

CORRECTLY.

USE APPROPRIATE NEEDLE FOR

FABRIC AND THREAD IN USE.

CHANGE THE NEEDLE.

REPAIR THE HOLE OR REPLACE

THE NEEDLE PLATE.

P. 27

4. BREAKING

BOBBIN

THREAD

1. INCORRECTLY THREADED

BOBBIN.

2. TOO MUCH THREAD IS

WOUND ON THE BOBBIN.

3. LINT IS STUCK INSIDE THE

BOBBIN HOLDER.

4. THREAD QUALITY IS

TOO LOW.

5. THREAD IS JAMMING

AROUND THE BOBBIN.

THREAD BOBBIN CORRECTLY.

ADJUST THE POSITION OF STOPPER.

CLEAN THE BOBBIN HOLDER.

CHANGE TO A HIGH QUALITY

SEWING THREAD.

CLEAR OUT THE JAMMING THREAD.

5. NEEDLE

BREAKS

1. NEEDLE IS HITTING THE

NEEDLE PLATE.

2. NEEDLE IS BENT OR WORN.

3. NEEDLE IS HITTING THE HOOK.

4. THE FABRIC MOVES WHILE

THE NEEDLE IS PIERCING

IT, OR THE NEEDLE ZIGZAGS

WHILE IN FABRIC.

5. FABRIC IS BEING PULLED TOO

STRONGLY WHILE SEWING.

SEE MECHANICAL

ADJUSTMENT “NEEDLE DROP

POSITION”.

CHANGE THE NEEDLE.

SEE MECHANICAL ADJUSTMENT

“CLEARANCE BETWEEN NEEDLE

AND HOOK”.

SEE MECHANICAL ADJUSTMENT

“ZIGZAG SYNCHRONIZATION”.

GUIDE THE FABRIC GENTLY

WHILE SEWING.

P. 18

P. 21

P. 24

Содержание DC5100

Страница 1: ...SERVICE MANUAL PARTS LIST DC5100...

Страница 2: ...GEAR AND HOOK GEAR 22 FEED DOG HEIGHT 23 ZIGZAG SYNCHRONIZATION 24 TENSION RELEASE MECHANISM 25 STRETCH STITCH FEED BALANCE ADJUSTMENT 26 NEEDLE THREAD TENSION 27 BUTTONHOLE LEVER 28 PRESSER FOOT HEI...

Страница 3: ...D CONTROL LEVER UP DOWN NEEDLE POSITION BUTTON AUTO LOCK BUTTON REVERSE STITCH BUTTON FEED BALANCING DIAL HOOK COVER PLATE RELEASE BUTTON HOOK COVER PLATE NEEDLE CLAMP SCREW NEEDLE PRESSER FOOT THUMBS...

Страница 4: ...INDLE TO THE LEFT AND CUT THE THREAD AS SHOWN INSERTING THE BOBBIN PLACE THE BOBBIN IN THE BOBBIN HOLDER WITH THE THREAD RUNNING OFF IN THE COUNTERCLOCKWISE 1 END OF THREAD GUIDE THE THREAD INTO THE N...

Страница 5: ...NNEL 2 DRAW THE THREAD AROUND THE CHECK SPRING HOLDER FROM RIGHT TO LEFT THEN PULL UP THE THREAD 3 FIRMLY DRAW THE THREAD FROM RIGHT TO LEFT AND PULL IT TOWARD YOU INTO THE EYE OF THE THREAD TAKE UP L...

Страница 6: ...EWING LIGHT C UPPER SHAFT SENSOR D FEED MOTOR E ZIGZAG WIDTH MOTOR F DC MOTOR G POWER TRANSFORMER PRIMARY CIRCUIT H POWER TRANSFORMER SECONDARY CIRCUIT I PRINTED CIRCUIT BOARD F J MACHINE PLUG PRIMARY...

Страница 7: ...G PROCEDURE MACHINE DOESN T WORK WELL IS NEEDLE SET OK IS POWER SUPPLY OK IS THREADING OK N G O K O K N G ELECTRIC QUICK CHECK END CORRECT IT START BASIC CHECK MECHANICAL ELECTRICAL CAN T JUDGE ELECTR...

Страница 8: ...GE THE NEEDLE RETHREAD USE THE RECOMMENDED SEWING NEEDLE AND THREAD USE A 11 BLUE TIP NEEDLE SEE MECHANICAL ADJUSTMENT NEEDLE BAR HEIGHT SEE MECHANICAL ADJUSTMENT NEEDLE TO HOOK TIMING SEE MECHANICAL...

Страница 9: ...RRECTLY THREADED BOBBIN 2 TOO MUCH THREAD IS WOUND ON THE BOBBIN 3 LINT IS STUCK INSIDE THE BOBBIN HOLDER 4 THREAD QUALITY IS TOO LOW 5 THREAD IS JAMMING AROUND THE BOBBIN THREAD BOBBIN CORRECTLY ADJU...

Страница 10: ...EN LOWER SHAFT GEAR AND HOOK GEAR ELIMINATE THE LOOSENESS SEE REPLACING DC MOTOR AND ADJUSTING MOTOR BELT TENSION DC MOTOR OIL ALL MOVING PARTS P 22 P 35 P 42 7 DEFORMATION PATTERN 1 INAPPROPRIATE FEE...

Страница 11: ...EN RESOLVED TURN ON THE POWER SWITCH IF ANY OF FOLLOWING PROBLEMS OCCUR TAKE THE RECOM MENDED ACTIONS IN THE ORDER THEY ARE SHOWN THE MACHINE DOES NOT RESPOND WHEN THE POWER SWITCH IS TURNED ON 1 CHEC...

Страница 12: ...OW qREVERSE STITCH BUTTON wAUTO LOCK BUTTON eUP DOWN NEEDLE POSITION BUTTON rMODE KEY tSTITCH WIDTH KEY ySTITCH WIDTH KEY uSTITCH LENGTH KEY iSTITCH LENGTH KEY PRESS THE REST OF KEYS IN ORDER FROM LEF...

Страница 13: ...NEEDLE FROM HIGHEST TO THE LOWEST POSITION SET THE SPEED CONTROL TO THE LEFTMOST POSITION THEN SLIDE THE SPEED CONTROL LEVER FROM LEFT TO RIGHT THEN RETURN TO LEFT DEPRESS THE FOOT CONTROL FULLY THEN...

Страница 14: ...ACE COVER REMOVE THE 2 SCREWS A AND REMOVE THE FACE COVER B TO ATTACH 2 FOLLOW THE PROCEDURE ABOVE IN REVERSE TOP COVER TO REMOVE 1 REMOVE THE 3 SCREWS C AND REMOVE THE TOP COVER D TO ATTACH 2 FOLLOW...

Страница 15: ...INE MODEL DC5100 SERVICE ACCESS 2 BELT COVER TO REMOVE 1 REMOVE THE 2 SCREWS A THEN UNHOOK THE RIB C AND REMOVE THE BELT COVER B TO ATTACH 2 FOLLOW THE PROCEDURE ABOVE IN REVERSE SCREW A BELT COVER B...

Страница 16: ...2 SCREWS A AND 4 SCREWS B 2 REMOVE THE BASE C TO ATTACH 3 REVERSE THIS PROCEDURE TO REMOVE 1 REMOVE THE 2 SCREWS D 2 REMOVE THE BED COVER E TO ATTACH 3 MOVE THE DROP LEVER TO THE LEFT AND ATTACH THE...

Страница 17: ...HE TOP COVER BELT COVER AND BED COVER 2 LOOSEN THE SETSCREWS A D E AND REMOVE THE SETCREWS B C AND F 3 REMOVE THE FRONT COVER TO ATTACH 4 FOLLOW THE PROCEDURE ABOVE IN REVERSE SETSCREW A SETSCREW B SE...

Страница 18: ...VE THE COVER DETACH THE PRESSER FOOT LIFTER SECTION FIRST WITH THE PRESSER FOOT LIFTER IN THE DOWN POSITION TO ATTACH 4 FOLLOW THE PROCEDURE ABOVE IN REVERSE SETSCREW A SETSCREW B SETSCREW C SETSCREW...

Страница 19: ...TO REMOVE 1 REMOVE SETSCREW A AND THE NEEDLE PLATE 2 REMOVE THE BED COVER SEE PAGE 14 3 REMOVE SETSCREW B AND THE FREE ARM COVER TO ATTACH 4 FOLLOW THE PROCEDURE ABOVE IN REVERSE NEEDLE PLATE SETSCREW...

Страница 20: ...2 IF THE NEEDLE DROP POSITION IS NOT IN THE CENTER OF THE NEEDLE PLATE HOLE WHEN THE STRAIGHT STITCH IS SELECTED OR IF THE CLEARANCE BETWEEN THE NEEDLE AND EDGE OF THE NEEDLE PLATE HOLE ON BOTH SIDE...

Страница 21: ...THE NEEDLE IN ASCENDING TRAVEL OF NEEDLE FROM ITS LEFT AND LOWEST POOSITION 1 REMOVE THE NEEDLE PLATE AND BOBBIN HOLDER TURN ON THE POWER SWITCH 3 SELECT THE PATTERN SIMPLE ZIGZAG MAXIMUM ZIGZAG WIDT...

Страница 22: ...STITCH PATTERN NO 2 LEFT NEEDLE POSITION 3 REMOVE THE BED COVER 4 TURN THE HANDWHEEL TOWARD YOU AND SET THE NEEDLE BAR AT THE LOWEST POSITION 5 LOOSEN THE SETSCREWS ON THE LOWER SHAFT TIMING GEAR 6 R...

Страница 23: ...S D AND E THEN LIGHTLY LOOSEN THE SETSCREW F 2 TURNING THE HANDWHEEL TOWARD YOU SLOWLY BY HAND MOVE THE HOOK SETPLATE UP OR DOWN TO ADJUST THE CLEARANCE BETWEEN THE TEST PIN C AND THE POINT OF THE HOO...

Страница 24: ...HOOK POINT IS WITHIN THE FEED DOG WIDTH IF THE PLAY EXCEEDS 0 8 MM ADJUST AS FOLLOWS ADJUSTMENT 1 REMOVE THE BED COVER SEE PAGE 14 2 LOOSEN THE SETSCREW 3 TURN THE LOWER SHAFT BUSHING ECCENTRIC BUSHIN...

Страница 25: ...AISED 1 LOWER THE PRESSER FOOT 2 TURN ON THE POWER SWITCH 3 REMOVE THE BED COVER 4 TURN THE HANDWHEEL TOWARD YOU TO SET THE FEED DOG AT THE HIGHEST POSITION 5 LOOSEN THE SETSCREW A AND NUT B 6 ADJUST...

Страница 26: ...T SHIELD PLATE IN THE DIRECTION OF A IF THE SWING POINT IS HIGHER THAN 7 5 MM B IF THE SWING POINT IS LOWER THAN 6 3 MM 4 POSITION THE UPPER SHAFT SHIELD PLATE AS CLOSE AS POSSIBLE TO THE LEFT IT SHOU...

Страница 27: ...A MOVE THE TENSION RELEASE PLATE 1 UNTIL IT TOUCHES TENSION DISK SUPPORTER IN THIS CONDITION TIGHTEN THE SET SCREW A 4 RAISE THE PRESSER FOOT LIFTER AND CHECK THE TENSION RELEASE MECHANISM 5 SET THE...

Страница 28: ...T AS FOLLOWS ADJUSTMENT PROCEDURE 1 TURN THE POWER SWITCH ON AND SELECT PATTERN NO 3 2 SET THE SLIT OF THE FEED BALANCING DIAL C AT THE STANDARD SETTING MARK ON THE FRONT COVER 3 PUT THE PAPER BETWEEN...

Страница 29: ...A 50 WHITE POLYESTER THREAD BEING PULLED AT APPROXIMATELY 110 MM SEC IF THE TENSION IS OUT OF THE STANDARD RANGE ADJUST AS FOLLOWS ADJUSTMENT PROCEDURE 1 REMOVE THE FRONT COVER UNIT SEE PAGE 15 2 PUL...

Страница 30: ...ND LOOSEN SETSCREW A 3 LOWER THE BUTTONHOLE LEVER POSITION THE BUTTONHOLE LEVER GUIDE SO THE SCREEN DISPLAYS L TIGHTEN SETSCREW A TO ADJUST THE BUTTONHOLE SENSOR POSITION 4 INSTALL THE BUTTONHOLE FOOT...

Страница 31: ...EN THE PRESSER FOOT IS RAISED THE CLEARANCE BETWEEN THE PRESSER FOOT AND THE NEEDLE PLATE SHOULD BE 5 7 TO 6 3 MM WHEN THE PRESSER FOOT IS LOWERED THE EDGE OF THE FOOT AND THE FEED DOG WINDOW ON THE N...

Страница 32: ...SEE PAGE 15 2 REMOVE SCREWS A AND B AND THE NEEDLE THREAD TENSION UNIT C TO ATTACH 1 REVERSE THIS PROCEDURE NOTE AFTER CHANGING THE NEEDLE THREAD TENSION UNIT CHECK THE MECHANICAL ADJUSTMENT TENSION R...

Страница 33: ...E NEEDLE THREADER 1 IF THE HOOK OF THE THREADER PLATE TOUCHES LEFT OR RIGHT SIDE OF THE NEEDLE EYE LOOSEN THE SCREW AND ADJUST THE HOOK POSITION FIG B 2 IF THE HOOK OF THE THREADER PLATE TOUCHES THE T...

Страница 34: ...NECTING THE MACHINE SOCKET AND POWER TRANSFORMER CONNECTORS PULL THEM WHILE PUSHING THEM TOWARD THE A BOARD TO UNLOCK THEM TO INSTALL 4 TO INSTALL FOLLOW THE ABOVE PROCEDURE IN REVERSE NOTE WHEN INSTA...

Страница 35: ...NTED CIRCUIT BOARD F SETSCREWS 2 TO REMOVE 1 REMOVE THE FRONT COVER UNIT 2 UNPLUG THE CONNECTOR OF THE PRINTED CIRCUIT BOARD F 3 REMOVE THE 2 SETSCREWS AND PRINTED CIRCUIT BOARD F TO ATTACH 4 FOLLOW T...

Страница 36: ...DISCONNECT THE SLIDE VOLUME CONNECTOR 3 REMOVE THE PRINTED CIRCUIT BOARD A 4 REMOVE THE CS RINGS 2 5 REMOVE THE SLIDE VOLUME TO ATTACH 6 FOLLOW THE PROCEDURE ABOVE IN REVERSE REPLACING SLIDE VOLUME SL...

Страница 37: ...NECTOR REMOVE THE TWO SETSCREWS THEN REMOVE THE DC MOTOR AND BELT TO ATTACH 3 SET THE MOTOR IN MACHINE AND REPLACE SCREW A AND B 4 INSERT THE MOTOR CONNECTOR INTO THE CONNECTOR POST E ON THE A BOARD 5...

Страница 38: ...A SCREWDRIVER NOTE 1 REPLACE THE PRINTED CIRCUIT BOARD A IF YOU NOTICE ANY BROWNING DISCOLORATION OR OTHER ABNORMALITIES 2 ONLY INSTALL FUSES WITH THE CORRECT RATING IF THE FUSE IS LOOSE BEND THE FUSE...

Страница 39: ...E MACHINE SOCKET TO INSTALL 3 TO INSTALL THE MACHINE SOCKET FOLLOW THE ABOVE PROCEDURE IN REVERSE NOTE PULL OUT THE CORD IN FRONT OF THE ARM TO PREVENT IT FROM CONTACTING WITH THE LOWER SHAFT OR OTHER...

Страница 40: ...L THE TRANSFORMER FOLLOW THE ABOVE PROCEDURE IN REVERSE NOTE PLACE THE REAR END OF THE TRANSFORMER ON THE TRANSFORMER SUPPORT SLIDE THE TWO TRANSFORMER WIRE TUBES TO THE SIDE OF TRANSFORMER AND SECURE...

Страница 41: ...GZAG WIDTH MOTOR FOLLOW THE ABOVE PROCEDURE IN REVERSE NOTE 1 THE SETSCREW OF ZIGZAG ROD SHOULD BE TIGHTENED TO 5 7 KGF OF TORQUE 2 CHECK TO ENSURE THAT THE UPPER SHAFT SENSOR MOUNTED ON THE ZIGZAG WI...

Страница 42: ...VE THE TWO SETSCREWS AND REMOVE THE FEED MOTOR CUT OFF THE CORD BINDER TO INSTALL TO INSTALL THE FEED MOTOR FOLLOW THE ABOVE PROCEDURE IN REVERSE NOTE ADJUST THE STRETCH STITCH PATTERNS SEE PAGE 26 RE...

Страница 43: ...ATE TO 0 7 TO 1 3 MM 3 TIGHTEN THE SETSCREW 4 INSTALL THE FRONT COVER TO CONFIRM TURN THE POWER SWITCH ON THE LED DISPLAYS WHEN THE BOBBIN WINDER SPINDLE IS SET THE BOBBIN WINDING POSITION AND DISPLAY...

Страница 44: ...UT YOU SHOULD STILL CHECK FOR POSSIBLE LUBRICATION NEEDS WHENEVER SERVICING MACHINES OIL USE GOOD QUALITY SEWING MACHINE OIL AT THE POINTS A B C D E F G H I J K INDICATED BY THE BLACK ARROWS GREASE US...

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