ELNA 7200 Service Manual
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ELNA 7200 Service Manual

ELNA 7200 Service Manual

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Summary of Contents for ELNA 7200

  • Page 2: To Remove Face Plate And Top Cover

    7200 TO REMOVE FACE PLATE AND TOP COVER SETSCREW (B) TOP COVER SETSCREW (C) PRESSURE DIAL CONNECTOR (D) CONNECTOR CASE FACE PLATE SETSCREW (A) FACE PLATE <TO REMOVE> REMOVE THE SETSCREW (A) TO REMOVE THE FACE PLATE. <TO ATTACH> ATTACH THE FACE PLATE WITH THE SETSCREW (A).

  • Page 3: To Remove Belt Cover And Machine Base

    7200 TO REMOVE BELT COVER AND MACHINE BASE PROJECTION (F) BELT COVER [TO REMOVE] BELT COVER 1. REMOVE THE SETSCREWS (A), (B) AND (C). 2. REMOVE THE BELT COVER. [TO ATTACH] SETSCREW (A) 3. ATTACH THE BELT COVER BY INSERTING THE PROJECTIONS (D), (E) AND (F) AND TIGHTEN THE SETSCREWS (A), (B) AND (C).

  • Page 4: To Remove Auto Thread Cutter Cover

    7200 TO REMOVE AUTO THREAD CUTTER COVER [TO REMOVE]: LOOSEN THE SETSCREW (A) AND PULL OFF THE AUTO THREAD CUTTER COVER. SETSCREW (A) [TO ATTACH]: REPLACE THE AUTO THREAD CUTTER COVER AND TIGHTEN THE SETSCREW (A). AUTO THREAD CUTTER COVER...
  • Page 5 7200 TO REMOVE FRONT COVER [TO REMOVE] SETSCREW (A) 1 REMOVE THE FACE PLATE, TOP COVER AND BELT COVER (REFER TO PAGES 1 AND 2). 2 LOOSEN THE SETSCREWS (A), (B), (C) AND (D). 3 PULL OUT THE CONNECTORS (REFER TO PAGE 22) AND REMOVE THE FRONT COVER.
  • Page 6 7200 TO REPLACE CIRCUIT BOARD A AND FUSE MOUNTING CIRCUIT BOARD A BRACKET SETSCREW (D) [TO REMOVE] SETSCREW (A) SETSCREW (A) 1 REMOVE THE FRONT COVER SETSCREW (D) (REFER TO PAGE 4). 2 REMOVE THE 4 SETSCREWS (A). REMOVE THE CIRCUIT BOARD A TOGETHER WITH THE MOUNTING BRACKET.
  • Page 7 7200 TO REPLACE CIRCUIT BOARD K CIRCUIT BOARD K SETSCREWS SETSCREWS [TO REMOVE] 1. REMOVE THE FRONT COVER (REFER TO PAGE 4). PULL OUT CONNECTORS FROM CIRCUIT BOARD A. 2. REMOVE THE 6 SETSCREWS AND CIRCUIT BOARD K. [TO ATTACH] REVERSE THE ABOVE PROCEDURE.
  • Page 8 7200 TO REPLACE CIRCUIT BOARD F CS RING CIRCUIT BOARD F [TO REMOVE THE CIRCUIT BOARD F] 1. REMOVE THE FRONT COVER (REFER TO PAGE 4) 2. PULL OUT THE CONNECTOR FROM THE CIRCUIT BOARD A. 3. REMOVE THE 3 SETSCREWS (A), 2 CS RINGS AND CIRCUIT BOARD F.

  • Page 9: Connection Of Connectors

    7200 CONNECTION OF CONNECTORS LOWER SHAFT SENSOR (BLACK 5 PINS) CIRCUIT BOARD F BOBBIN WINDER (BLACK 7 PINS) (BLACK 4 PINS) PRESSER BAR SWITCH LAMP (WHITE 2 PINS) BH SENSOR (RED 2 PINS) CIRCUIT BOARD K (BLACK 32 PINS) AUTO THREAD...

  • Page 10: To Adjust Needle Drop Position

    7200 TO ADJUST NEEDLE DROP POSITION WHEN THE STRAIGHT STITCH IS SELECTED, THE NEEDLE SHOULD BE AT THE CENTER OF THE HOLE OF THE NEEDLE PLATE. WHEN THE MAXIMUM ZIGZAG WIDTH IS SELECTED, THE DISTANCE BETWEEN THE NEEDLE AND THE EDGE OF THE HOLE OF THE NEEDLE PLATE AT THE RIGHT AND LEFT NEEDLE POSITIONS SHOLD BE 0.2 MM OR MORE AS SHOWN IN FIG.

  • Page 11: Adjustment Of Hook Timing

    7200 ADJUSTMENT OF HOOK TIMING THE AMOUNT OF ASCENDING TRAVEL OF THE NEEDLE BAR FROM ITS LOWEST POSITION TO THE POSITION WHERE THE TIP OF THE ROTARY HOOK EXACTLY MEETS THE RIGHT SIDE OF THE NEEDLE SHOLD BE 3.25 TO 3.55 MM.

  • Page 12: Adjustment Of Needle Bar Height

    7200 ADJUSTMENT OF NEEDLE BAR HEIGHT BEFORE PROCEEDING WITH THIS ADJUSTMENT, CHECK THE HOOK TIMING (REFER TO PAGE 10). THE DISTANCE BETWEEN THE UPPER EDGE OF THE NEEDLE EYE AND THE TIP OF THE HOOK SHOULD BE IN THE RANGE OF 1.6 –2.0MM WHEN THE TIP OF THE HOOK...

  • Page 13: Adjustment Of Clearance Between Needle And Rotary Hook

    7200 ADJUSTMENT OF CLEARANCE BETWEEN NEEDLE AND ROTARY HOOK THE CLEARANCE BETWEEN NEEDLE AND THE TIP OF THE ROTARY HOOK (J) SHOULD BE BETWEEN –0.1 AND +0.05 MM [ADJUSTMENT I] 1.REMOVE THE FACE PLATE, AND ATTACH A HEXAGONAL MASTER NEEDLE (I).
  • Page 14 7200 TO ADJUST THE BACKLASH OF HOOK DRIVE AND LOWER SHAFT GEARS THE GEARS TURNS SMOOTHLY AND ROTARY PLAY OF THE HOOK SHOULD BE 0.8 MM OR LESS (F) WHEN THE TIP OF HOOK (E) IS WITHIN THE WIDTH OF THE FEED DOG (C) AS SHOWN BELOW.
  • Page 15 7200 ADJUSTMENT OF DIRECTION OF PRESSER BAR AND ITS HEIGHT WHEN THE PRESSER FOOT IS LIFTED, THE DISTANCE BETWEEN THE SURFACE OF THE NEEDLE PLATE AND THE BOTTOM OF THE ZIGZAG FOOT SHOULD BE 6 MM AS SHOWN IN FIG. 1. WHEN THE PRESSER BAR IS LOWERED, THE PRESSER FOOT SHOULD BE PARALLEL WITH THE SLOTS FOR THE FEED DOGS AS SHOWN IN FIG.

  • Page 16: To Adjust The Feed Dog Height

    7200 TO ADJUST THE FEED DOG HEIGHT WHEN THE PRESSURE ADJUSTING DIAL IS AT “3” AND THE PRESSER FOOT (A) IS LOWERED, THE HIGHEST POSITION OF THE FEED DOG (B) SHOULD BE 0.80 TO 0.90 MM (C) FROM THE SURFACE OF THE NEEDLE PLATE (D).
  • Page 17 7200 TO REPLACE NEEDLE THREAD TENSION UNIT SETSCREW (A) [TO REMOVE]: 1. REMOVE THE FACE PLATE. 2. REMOVE THE SETSCREWS (A) AND (B). REMOVE THE THREAD GUIDE COVER (C). 3. LOOSEN THE HEXAGONAL SOCKET SCREW (D). 4. REMOVE THE TENSION RELEASE PLATE (F) FROM THE TENSION RELEASE ARM (E).

  • Page 18: To Adjust The Upper Thread Tension

    7200 TO ADJUST THE UPPER THREAD TENSION THE UPPER THREAD TENSION SHOULD BE 65–80 GRAMS WHEN PULLING THE THREAD (WHILE POLYESTER THREAD SIZE 50) AT THE SPEED OF 110 MM/SEC WITH THE TENSION DIAL AT “4” (MAKE SURE THE FOOT IS LOWERED.) 1 SET THE THREAD TENSION DIAL (A) TO “4”.

  • Page 19: To Replace Needle Threader Plate

    7200 TO REPLACE NEEDLE THREADER PLATE [TO REMOVE]: 1 REMOVE THE FOOT HOLDER. PIN (B) (FIG.I) 2 PULL OUT THE THREADER PLATE UNIT (A). THREADER PLATE UNIT (A) [TO ATTACH]: 3 PUSH THE THREADER PLATE UNIT (A) UP TO SNAP IT WITH THE PIN (B) AS SHOWN IN FIG. I.
  • Page 20 7200 TO REPLACE AUTO THREAD CUTTER PIN (B) SETSCREW (A) [TO REMOVE]: 1 REMOVE THE NEEDLE PLATE, MACHINE BASE AND AUTO THREAD CUTTER COVER (REFER TO PAGE 2 AND 3). 2 REMOVE THE 2 SETSCREWS (A) AND REMOVE THE SETSCREW (A) AUTO THREAD CUTTER.
  • Page 21 7200 ADJUSTMENT OF POSITION OF SLIDING PLATE 1 SET THE NEEDLE BAR AT THE LOWEST SLIDING PLATE (D) POSITION. INSERT THE PIN (B) INTO THE GROOVE OF THE CAM (A) BY PUSHING DOWN THE DRIVING ARM (1). IN THIS STATE, TURN THE HANDWHEEL TO SET THE SLIDING PLATE (D) AT THE RIGHTMOST POSITION.

  • Page 22: To Replace Driving Motor

    7200 TO REPLACE DRIVING MOTOR [TO REMOVE] 1 REMOVE THE FRONT COVER. (REFER TO PAGE 4) 2 REMOVE THE MOTOR BELT. 3 PULL OUT THE CONNECTOR FROM THE CIRCUIT BOARD A. 4 REMOVE THE 2 SETSCREWS (A) AND PULL OUT THE DRIVING MOTOR.

  • Page 23: To Adjust Zigzag Timing

    7200 TO ADJUST ZIGZAG TIMING WHEN THE MACHINE IS SET FOR ZIGZAG STITCH- ING, THE NEEDLE SHOULD START TO ZIGZAG 8.0 MM TO 8.4 MM (C = HEIGHT OF ZIGZAG FOOT) ABOVE THE SURFACE OF THE NEEDLE PLATE. 1 SET THE MACHINE FOR ADJUSTING MODE BY...
  • Page 24 7200 ADJUSTMENT OF STRETCH STITCH FEED BALANCE WHEN THE NUMBER 8 IS SHOWN 5 TIMES WITH THE STRETCH STITCH BALANCE DIAL (C) AT THE SETTING MARK (D), THE MEASUREMENT SHOULD BE BETWEEN 32 AND 38 MM AS SHOWN IN FIG. 1.

  • Page 25: Diagnosis Chart

    NOTE: 1. THIS DIAGNOSIS DEVICE IS PROVIDED FOR THE PURPOSE OF CHECKING THE CIRCUIT BOARDS A AND K AND THE FUNCTIONS OF 7200. 2. THE POWER SWITCH MUST BE TURNED OFF WHEN REPLACING PARTS. 3. THE LANGUAGE ON THE LCD IS ENGLISH ONLY.
  • Page 26 7200 1.STEP 1 (FUNCTION OF BUZZER, LCD AND LED) [FAULTY CONDITION] [CORRECT CONDITION] BUZZER DOES NOT SOUND. 1) BUZZER SOUNDS Step1 THE STEP 1 SCREEN DOES NOT 2) LCD AND LED BLINK AT APPEAR. 1 SECOND INTERVAL. LCD AND LED DO NOT BLINK.
  • Page 27 7200 [CORRECT CONDITION] [FAULTY CONDITION] 4.STEP 4 (PHOTO SENSOR) THE DISPLAY SHOWS [H] OR [L]. THE SCREEN DOES NOT CHANGE. Step4 BH PULL THE BUTTONHOLE LEVER TOWARD YOU-[H] –REMEDY– Sensor RELEASE THE BUTTONHOLE ADJUST THE POSITION OF THE Csen Fsen Bsen LEVER-[L] SHIELD PLATE.
  • Page 28 7200 [CORRECT CONDITION] [FAULTY CONDITION] 8. STEP 8 THE DRIVING MECHANISM DOES PRESS A NUMBER (SOLENOID) CORRESPONDING TO THE NOT FUNCTION. Step8 Solenoid SOLENOIDS Sol1 Sol2 Sol3 1) FOR AUTO-THREAD CUTTER –REMEDY– SET THE NEEDLE BAR AT THE LOWEST POSITION.
  • Page 29 7200 10. STEP 10 (DRIVING AND BOBBIN WINDING MOTORS) [FAULTY CONDITION ] [CORRECT CONDITION] Step10 THE DISPLAY SHOWS “error”. WHEN THE PRESSER BAR IS Sewing Motor LOWERED AND THE FOOT CONTROL IS DEPRESSED, THE Spool Motor DRIVING MOTOR RUNS. WHEN THE BOBBIN WINDING –REMEDY–...

  • Page 30: To Adjust Buttonhole Lever Position

    7200 TO ADJUST BUTTONHOLE LEVER POSITION 1 WHILE PRESSING THE NEEDLE UP/DOWN AND LOCK STITCH KEYS, TURN THE POWER SWITCH ON. PRESS THE NUMBER “4” BUTTON WITHIN 3 SECONDS. 2 REMOVE THE FACE PLATE (REFER TO PAGE 1). LOWER THE BUTTONHOLE LEVER (C).
  • Page 31 7200 ADJUSTMENT OF PRESSER BAR LIFTER SWITCH POSITION 1 WHILE THE PRESSING THE NEEDLE UP/DOWN AND LOCK STITCH BUTTONS, TURN THE POWER SWITCH ON. PRESS THE NUMBER “9” BUTTON IN 3 SECONDS. 2 REMOVE THE FACE PLATE AND TOP COVER PLATE (REFER TO PAGE 1).
  • Page 32 7200 TO ADJUST THE AUTO THREAD CUTTER SWITCH POSITION 1 WHILE PRESSING THE NEEDLE UP/DOWN AND LOCK STITCH BUTTONS, TURN THE POWER SWITCH ON. PRESS THE NUMBER “9” BUTTON WITHIN 3 SECONDS. 2 REMOVE THE MACHINE BASE AND AUTO THREAD CUTTER COVER (REFER TO PAGES 2 AND 3).
  • Page 33 REFERENCE TO REMOVE FACE PLATE AND TOP COVER ...............1 TO REMOVE BELT COVER AND MACHINE BASE ..............2 TO REMOVE AUTO THREAD CUTTER COVER ..............3 TO REMOVE FRONT COVER ....................4 TO REPLACE CIRCUIT BOARD A AND FUSE ..............5 TO REPLACE CIRCUIT BOARD K ..................6 TO REPLACE CIRCUIT BOARD F ..................7 CONNECTION OF CONNECTORS ..................8 TO ADJUST NEEDLE DROP POSITION ................9...

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