ELNA 7200 User manual

Service Manual

1
7200
<TO REMOVE>
REMOVE THE SETSCREW (A) TO REMOVE THE
FACE PLATE.
<TO ATTACH>
ATTACH THE FACE PLATE WITH THE SETSCREW (A).
FACE PLATE
TOP COVER
<TO REMOVE>
1. REMOVE THE SETSCREWS (B) AND (C).
2. PULL OUT THE CONNECTOR (D) OF THE
BOBBIN WINDER AND REMOVE THE TOP COVER.
<TO ATTACH>
1. CONNECT THE CONNECTOR (D) AS SHOWN
ABOVE.THEN ATTACH THE TOP COVER.TIGHTEN
THE SETSCREWS (B) AND (C).
TO REMOVE FACE PLATE AND TOP COVER
SETSCREW (A)
FACE PLATE
TOP COVER
SETSCREW (B)
SETSCREW (C)
CONNECTOR (D)
CONNECTOR CASE
PRESSURE DIAL

2
7200
MACHINE BASE
[TO REMOVE]
REMOVE THE 5 SETSCRWS (A), (B), (C), (D) AND
(E).
[TO ATTACH]
ATTACH THE MACHINE BASE WITH
RUBBER PLUGS, WASHERS AND THE 5
SETSCREWS (A), (B), (C), (D) AND (E).
SETSCREW (B)
SETSCREW (A)
SETSCREW (C)
SETSCREW (D)
MACHINE BASE
TO REMOVE BELT COVER AND MACHINE BASE
BELT COVER
[TO REMOVE]
1. REMOVE THE SETSCREWS (A), (B) AND (C).
2. REMOVE THE BELT COVER.
[TO ATTACH]
3. ATTACH THE BELT COVER BY INSERTING THE
PROJECTIONS (D), (E) AND (F) ANDTIGHTEN THE
SETSCREWS (A), (B) AND (C).
SETSCREW (A)
SETSCREW (C)
BELT COVER
SETSCREW (B)
PROJECTION (F)
PROJECTION (E)
RUBBER
FOOT
WASHER
SETSCREW (E)
○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○
MACHINE REST
(2 CM HIGH)
PROJECTION (D)

3
7200
TO REMOVE AUTO THREAD CUTTER COVER
[TO REMOVE]:
LOOSEN THE SETSCREW (A) AND PULL OFF THE
AUTO THREAD CUTTER COVER.
[TO ATTACH]:
REPLACE THE AUTO THREAD CUTTER COVER AND
TIGHTEN THE SETSCREW (A).
SETSCREW (A)
AUTO THREAD
CUTTER COVER

4
7200
1REMOVE 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.
[TO ATTACH]
4PROCEED WITH THE ABOVE PROCEDURE IN
REVERSE.
SETSCREW (A)
SETSCREW (C)
TO REMOVE FRONT COVER
[TO REMOVE]
SETSCREW (B)
SETSCREW (D)
FRONT
COVER
[VIEW FROM BELT COVER SIDE]
[VIEW FROM FACE PLATE SIDE]
INSULATION PAPER
CORDS
WHEN ATTACHING THE FRONT COVER, ENSURE THAT
THE CORDS SHOWN IN THE PHOTO ON THE LEFT DO
NOT GET CAUGHT BETWEEN THE COVER AND THE
PARTS.

5
7200
TO REPLACE CIRCUIT BOARD A AND FUSE
[TO REMOVE]
1REMOVE THE FRONT COVER
(REFER TO PAGE 4).
2REMOVE THE 4 SETSCREWS (A).
REMOVE THE CIRCUIT BOARD A TOGETHER
WITH THE MOUNTING BRACKET.
3REMOVE THE 2 SETSCREWS (D).
4 REMOVE THE 2 SETSCREWS (B) AND 2 SET
SCREWS (C).
5REMOVE THE CIRCUIT BOARD A AND LID.
[TO ATTACH]
REVERSE THE ABOVE PROCEDURE.
*THE SHINY SIDE OF THE INSULATION PAPER
SHOULD FACE THE CIRCUIT BOARD A.
TO REMOVE THE INSULATION PAPER,
REMOVE THE BOTH LEFT SIDE OF SET
SCREWS (B) AND (D) ON THE CIRCUIT
BOARD A.
[TO CHANGE THE FUSE]
1. REMOVE THE 2 SETSCREWS (B) AND
2 SETSCREWS (C).
2. REMOVE THE CIRCUIT BOARD A AND LID.
3. PRY THE FUSE OUT WITH A SCREWDRIVER
AS SHOWN.
IF THE FUSE IS LOOSE, BEND THE FUSE
HOLDER WITH YOUR FINGERS.
REPLACE THE FUSE WITH THE SAME PART # AS
SHOWN ON THE ILLUSTRATION.
CIRCUIT BOARD A
SETSCREW (A) SETSCREW (A)
SETSCREW (A)
MOUNTING
BRACKET
INSULATION
PAPER
SETSCREW (B) SETSCREW (B)
SETSCREW (C)
SETSCREW (A)
A BOARD CASE
LID
SETSCREW (B)
SETSCREW (D)
SETSCREW (D)
(F1) 3.15A
PART NO. 00182904
(F2) 2.5A
PART NO. 000144605
(F2) 2.5A
PART NO. 000144605
SETSCRW (C)
SETSCREW (C)
LID

6
7200
TO REPLACE CIRCUIT BOARD K
[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.
SETSCREWS SETSCREWS
SETSCREW
CIRCUIT BOARD K

7
7200
TO REPLACE 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.
[TO ATTACH]
REVERSE THE ABOVE PROCEDURE.
MAKE SURE THAT THE BUTTONS ARE PLACED IN
THE CORRECT PLACES AND DIRECTION (FIG. 1).
CIRCUIT BOARD FCS RING
SETSCREW (A)
AUTO THREAD CUTTER BUTTON
UP/DOWN NEEDLE POSITION
BUTTON
LOCK STITCH BUTTON
REVERSE STITCH BUTTON
START/STOP BUTTON (FIG. 1)

8
7200
CONNECTION OF CONNECTORS
CIRCUIT BOARD F
(BLACK 7 PINS)
ZIGZAG STEPPING
MOTOR (WHITE 7 PINS)
FEED STEPPING
MOTOR (BLACK 7 PINS)
LAMP (WHITE 2 PINS)
DROP FEED SWITCH
(BLUE 2 PINS)
DC MOTOR
(WHITE 5 PINS)
FOOT CONTROL
(WHITE 2 PINS)
LOWER SHAFT SENSOR
(BLACK 5 PINS)
BOBBIN WINDER
(BLACK 4 PINS)
BH SENSOR (RED 2 PINS) CIRCUIT BOARD K
(BLACK 32 PINS)
PRESSER BAR
SWITCH
MOTOR FOR THREAD
TENSION RELEASE
(RED 7 PINS)
AUTO THREAD
CUTTER SWITCH
(RED 2 PINS)
SEPARATION SOLENOID
(RED 2 PINS)
BOBBIN SOLENOID
(BLACK 2 PINS)
TRANSFORMER
(SECONDARY)
(RED 6 PINS) TRANSFORMER
(PRIMARY)
(BLACK 2 PINS)
MACHINE SOCKET
(WHITE 2 PINS)
CIRCUIT BOARD A
AUTO THREAD CUTTER
SOLENOID (WHITE 2 PINS)
CONNECTOR TO
CIRCUIT BOARD K
CIRCUIT BOARD F
CIRCUIT BOARD K

9
7200
TO ADJUST NEEDLE DROP POSITION
[TO ADJUST]:
1REMOVE THE FACE PLATE.
CHECK THE NEEDLE DROP POSITION ON THE
STITCH PATTERN ( ) AND ZIGZAG STITCH ( )
WITH MAXIMUM WIDTH.
2LOOSEN THE HEXAGONAL SOCKET SCREW (A)
JUST ENOUGH TO TURN THE ECCENTRIC PIN
(B). ADJUST THE NEEDLE DROP POSITION BY
TURNING THE ECCENTRIC PIN. THE DIRECTION
OF THE ECCENTRIC PIN (B) SHOULD BE AS
SHOWN IN FIG. 1.
3TIGHTEN THE HEXAGONAL SOCKET SCREW (A).
4ATTACH THE FACE PLATE.
HOLE OF NEEDLE PLATE
0.2 MM OR
MORE
0.2 MM OR
MORE
A=B
FIG. 2
HEXAGONAL
SOCKET SCREW (A)
ECCENTRIC PIN (B)
FIG. 1
THREADER
LEVER
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. 2.

10
7200
ADJUSTMENT OF HOOK TIMING
[TO ADJUST]:
1REMOVE THE MACHINE BASE (REFER TO PAGE 2)
2TURN THE POWER SWITCH ON AND SELECT
STITCH PATTERN NO. 2 ( ) IN MODE 1.
3 SET THE ZIGZAG WIDTH AT 0 AND TURN THE
POWER SWITCH OFF.
4REMOVE THE PRESSER FOOT, NEEDLE PLATE AND
BOBBIN HOLDER.
5 TURN THE HANDWHEEL TOWARD YOU TO SET
THE NEEDLE BAR AT ITS LOWEST POSITION.
6LOOSEN THE HEXAGONAL SOCKET SCREWS (A)
AND (B) ON THE LOWER SHAFT GEAR (C).
7MOVE THE NEEDLE BAR 3.4 MM FROM THE
LOWEST POSITION.
8TURN THE LOWER SHAFT GEAR (C) UNTIL THE TIP
OF THE HOOK MEETS THE RIGHT SIDE OF THE
NEEDLE WHILE HOLDING THE HANDWHEEL.
9 TIGHTEN THE HEXAGONAL SOCKET SCREW (A)
AND (B).
10 ATTACH THE BOBBIN HOLDER, NEEDLE PLATE AND
PRESSER FOOT.
11 ATTACH THE MACHINE BASE.
HEXAGONAL SOCKET SCREW (A)
HEXAGONAL SOCKET
SCREW (B)
LOWER SHAFT GEAR (C)
3.25—3.55mm
LOWEST POINT
NEEDLE SIZE 14 TIP OF HOOK
NEEDLE
PLATE
BOBBIN
HOLDER
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.

11
7200
ADJUSTMENT OF NEEDLE BAR HEIGHT
[TO ADJUST]:
1TURN THE POWER SWITCH ON AND SELECT
STITCH PATTERN NO. 2 ( ) IN MODE 1.
2 SET THE ZIGZAG WIDTH AT 0 AND TURN THE
POWER SWITCH OFF.
REMOVE THE TOP COVER (SEE PAGE 1).
3REMOVE THE PRESSER FOOT, NEEDLE PLATE
(A), BOBBIN HOLDER (B) AND FACE PLATE.
4REMOVE THE SETSCREW (C), AND REMOVE
THE LAMP SET PLATE.
5REMOVE THE ARM THREAD GUIDE BY
REMOVING THE SETSCREWS (SEE FIG. I.)
REMOVE THE FACE PLATE GUIDE BY
REMOVEING THE SET SCREWS (D), (E) AND
(F).
6TURN THE BALANCE WHEEL TOWARD YOU
UNTIL THE TIP OF THE HOOK MEETS THE
RIGHT SIDE OF THE NEEDLE.
7LOOSEN THE HEXAGONAL SOCKET SCREW
(G).
8MOVE THE NEEDLE BAR TO ADJUST THE
NEEDLE BAR HEIGHT, AND TIGHTEN THE
HEXAGONAL SOCKET SCREW (G). BE
CAREFUL NOT TO TURN THE NEEDLE BAR.
9FIX THE ARM THREAD GUIDE AND FACE PLATE
GUIDE.
10 ATTACH THE FACE PLATE.
NEEDLE
PLATE (A)
BOBBIN
HOLDER (B)
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
MEETS RIGHT SIDE OF THE NEEDLE IN THE LEFT NEEDLE POSITION ( ) AS THE NEEDLE
ASCENDS FROM ITS LOWEST POSITION.
HEXAGONAL SOCKET
SCREW (G)
SETSCREW (C)
SETSCREW (D)
LAMP SET PLATE
SETSCREW (E)
SETSCREW (F)
FACE PLATE
GUIDE
SETSCREWS
FIG. I
ARM THREAD GUIDE
TIP OF HOOK
HOOK RACE
NEEDLE
SIZE 14
1.6–2.0 mm
UPPER EDGE OF NEEDLE EYE

12
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 II]
1. REMOVE THE MACHINE BASE (REFER TO
PAGE 2).
2. TURN THE POWER SWITCH ON, AND SELECT
THE STITCH PATTERN . SET THE ZIGZAG
WIDTH AT “7”,
3. REMOVE THE PRESSER FOOT, NEEDLE PLATE
AND BOBBIN HOLDER.
4. LOOSEN THE SETSCREWS (E) AND (F).
LOOSEN THE SETSCREW (G) JUST ENOUGH TO
MOVE THE HOOK BASE PLATE (H).
5. TURN THE HANDWHEEL TOWARD YOU UNTIL
THE TIP OF HOOK COMES JUST BEHIND THE
MASTER NEEDLE.
ADJUST THE CLEARANCE BETWEEN THE
NEEDLE AND THE TIP OF THE ROTARY HOOK,
BY MOVING THE HOOK BASE PLATE UP OR
DOWN, TO WITHIN –0.1 TO +0.05 MM AT THE LEFT
AND RIGHT NEEDLE POSITIONS.
6. TIGHTEN THE SETSCREWS (E), (F) AND (G)
FIRMLY.
7. CHECK THE BACKLASH BETWEEN THE HOOK
DRIVE AND LOWER SHAFT GEARS.
REFER TO PAGE 13 FOR THE ADJUSTMENT.
8. ATTACH THE MACHINE BASE, BOBBIN HOLDER,
NEEDLE PLATE AND PRESSER FOOT.
SETSCREW (G)
SETSCREW (F)
SETSCREW (E)
HOOK BASE
PLATE (H)
MASTER NEEDLE (I)
TIP OF HOOK (J)
-0.10 — +0.05MM
[ADJUSTMENT I]
1.REMOVE THE FACE PLATE, AND ATTACH A
MASTER NEEDLE (I).
2. TURN THE POWER SWITCH ON.
3. SELECT THE STITCH PATTERN AND SET THE
ZIGZAG WIDTH AT “7”.
4. REMOVE THE PRESSER FOOT, NEEDLE PLATE
AND BOBBIN HOLDER.
5. LOOSEN THE HEXAGONAL SOCKET SCREW (A)
AND ADJUST THE CLEARANCE BETWEEN THE
NEEDLE AND TIP OF ROTARY HOOK (J) BY
MOVING THE NEEDLE BAR SUPPORTER.
CHECK THE CLEARANCE (D) BETWEEN THE
NEEDLE AND THE EDGE OF NEEDLE PLATE HOLE.
IF THE CLEARANCE (D) IS LESS THAN 0.15 MM,
FOLLOW THE PROCEDURE BELOW
[ADJUSTMENT II].
HEXAGONAL
SOCKET
SCREW (A)
NEEDLE BAR
SUPPORTER (B)
HOLE OF NEEDLE
PLATE (C)
CLEARANCES
MUST BE 0.15 mm
(D) OR MORE
(CLEARANCES
MUST BE EVEN)

13
7200
TO ADJUST THE BACKLASH OF HOOK DRIVE AND LOWER SHAFT GEARS
1REMOVE THE MACHINE BASE (REFER TO PAGE 2)
2REMOVE THE NEEDLE, NEEDLE PLATE AND
BOBBIN HOLDER.
3LOOSEN THE HEXAGONAL SOCKET SCREW (D).
4IF THE BACKLASH IS TOO MUCH, TURN THE LOWER
SHAFT BUSHING IN DIRECTION A.
IF THE BACKLASH ISTOO LITTLE, TURN THE LOWER
SHAFT BUSHING IN DIRECTION B.
5TIGHTEN THE HEXAGONAL SOCKET SCREW (D).
6ATTACH THE NEEDLE, NEEDLE PLATE AND BOBBIN
HOLDER.
7ATTACH THE MACHINE BASE.
NOTE: AFTER ADJUSTING THE BACKLUSH, BE SURE
TO CHECK AND ADJUST THE “HOOK TIMING”
AND THE “FEED DOG HEIGHT” (REFER TO
PAGES 10 AND 15).
LOWER SHAFT BUSHING
HEXAGONAL SOCKET SCREW (D)
WIDTH OF THE FEED DOG (C)
TIP OF HOOK (E)
A
B
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.
0.8 MM OR LESS

14
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. 2.
[TO ADJUST]:
1 REMOVE THE FACE PLATE (REFER TO PAGE 1)
2LIFT THE PRESSER BAR.
LOOSEN THE HEXAGONAL SOCKET SCREW (A).
ADJUST THE DIRECTION AND HEIGHT OF THE
PRESSER BAR.
3. ATTACH THE FACE PLATE.
HEXAGONAL SOCKET SCREW (A)
ZIGZAG FOOT
6 MM
SLOTS FOR FEED
DOGS
TO BE PARALLEL
WITH SLOTS FOR
FEED DOGS
HEXAGONAL
SOCKET
SCREW (A)
PRESSER BAR LIFTED
FIG. 1
FIG. 2

15
7200
TO ADJUST THE FEED DOG HEIGHT
NUT (F)
SETSCREW (E) SETSCREW (G)
ZIGZAG FOOT (A)
0.80—0.90mm
SURFACE OF NEEDLE PLATE
FEED DOG (B)
HEXAGONAL SOCKET SCREW (I)
SETSCREW (H)
THREADED HOLE (J)
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).
[TO ADJUST]:
1. REMOVE THE MACHINE BASE AND AUTO-
THREAD CUTTER COVER.
2. SET THE PRESSURE ADJUSTING DIAL AT “3”
WITH THE PRESSER FOOT LOWERED.
3. TURN THE BALANCE WHEEL TOWARD YOU TO
GET THE HIGHEST POSITION OF THE FEED DOG.
4. LOOSEN THE SETSCREW (E).
5. LOOSEN THE NUT (F).
6. ADJUST THE FEED DOG HEIGHT TO 0.85 MM BY
TURNING THE ADJUSTING SCREW (G).
7. TIGHTEN THE NUT (F) AND SET SCREW (E).
8. ATTACH THE BED COVER.
[PARALLEL OF THE FEED DOG]
IF THE FEED DOG IS NOT PARALLEL TO THE SUR-
FACE OF THE NEEDLE PLATE AT ITS HIGHEST PO-
SITION, MAKE THE ADJUSTMENT AS FOLLOWS:
*FOR THIS ADJUSTMENT, A HEXAGONAL SOCKET
SCREW (I), PART NO. 000111108 IS REQUIRED.
1. INSERT A HEXAGONAL SOCKET SCREW, PART
NO. 000111108 INTO THE THREADED HOLE (J)
UNTIL IT STOPS.
2. TURN THE SETSCREW (H) CLOCKWISE TO
LOOSEN IT.
3. TURN THE HEXAGONAL SOCKET SCREW (I)
UNTIL THE FEED DOG IS PARALLEL WITH THE
SURFACE OF THE NEEDLE PLATE.
4. TIGHTEN THE LEFT-HANDED SETSCREW (H).
5. REMOVE THE HEXAGONAL SOCKET SCREW (I).
6. ATTACH THE AUTO-THREAD CUTTER COVER
AND MACHINE BASE.
SETSCREW (G) HEXAGONAL
SOCKE T
SCREW (I)
SETSCREW
(E)
SETSCREW (H)

16
7200
TO REPLACE NEEDLE THREAD TENSION UNIT
[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).
REMOVE THE NEEDLE THREAD TENSION UNIT (G).
[TO ATTACH]:
REVERSE THE ABOVE PROCEDURE.
SETSCREW (A)
HEXAGONAL SOCKET
SCREW (D)
THREAD GUIDE
COVER (C)
SETSCREW (B)
TENSION RELEASE PLATE (F)
TENSION RELEASE ARM (E)
NEEDLE THREAD TENSION UNIT (G)

17
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.)
1SET THE THREAD TENSION DIAL (A) TO “4”.
2PULL OUT THE TENSION DIAL (A).
3LOWER THE PRESSER FOOT.
4ADJUST THE TENSION BY TURNING THE DIAL (B).
TO LOOSEN THE TENSION, TURN IT COUNTER-
CLOCKWISE.
TO TIGHTEN THE TENSION, TURN IT CLOCKWISE.
5. PUSH IN THE TENSION DIAL (A) ALIGNING THE “4”
WITH THE SETTING MARK (C).
WHITE POLYESTER THREAD
SIZE 50
TENSION DIAL
(A)
SETTING MARK (C)
DIAL (B)

18
7200
TO REPLACE NEEDLE THREADER PLATE
[TO REMOVE]:
1REMOVE THE FOOT HOLDER.
2PULL OUT THE THREADER PLATE UNIT (A).
[TO ATTACH]:
3PUSH THE THREADER PLATE UNIT (A) UP TO
SNAP IT WITH THE PIN (B) AS SHOWN IN FIG. I.
4ATTACH THE FOOT HOLDER
TO ADJUST THE POSITION OF THE
THREADER PLATE (C)
IF THE THREADER HOOK THRUSTS OR HITS
AGAINST EITHER LEFTOR RIGHT EDGE OF THE
NEEDLE EYE:
LOOSEN SCREW (D) AND ADJUST THE POSITION
OF THE THREADER PLATE (C).
IF THE THREADER HOOK THRUSTS AGAINST
EITHER TOP OR BOTTOM EDGE OF THE NEEDLE
EYE, OR MISSES THE NEEDLE EYE:
REMOVE THE FACE COVER AND LOOSEN THE
HEXAGONAL SOCKE SCREW (F). MOVE THE SET-
TING PLATE (G) UP OR DOWN TO ADJUST THE
HOOK POSITION. THEN TIGHTEN THE SETSCREW
(F).
SETSCREW (D)
(X)
(X) VIEW
HEXAGONAL
SOCKET SCREW (F)
THREADER PLATE (C)
SETTING
PLATE (G)
(FIG. II)
(FIG. III)
(FIG.I)
THREADER PLATE
UNIT (A)
PIN (B)
NEEDLE BAR
SETSCREWS (E)

19
7200
TO REPLACE AUTO THREAD CUTTER
[TO REMOVE]:
1REMOVE THE NEEDLE PLATE, MACHINE BASE AND
AUTO THREAD CUTTER COVER (REFER TO PAGE 2
AND 3).
2REMOVE THE 2 SETSCREWS (A) AND REMOVE THE
AUTO THREAD CUTTER.
[TO ATTACH]:
3INSERT THE PIN (B) INTO THE HOLE OF THE AUTO
THREAD CUTTER.
INSERT THE PIN (C) INTO THE HOLE OF THE
DRIVING ARM (1).
TIGHTEN THE 2 SETSCREWS (A).
[TO CHECK THE AUTO-THREAD CUTTER]
SET THE NEEDLE BAR AT THE LOWEST POSITION.
INSEET THE PIN (C) INTO THE GROOVE OF THE
CUTTER DRIVING CAM BY PUSHING DOWN THE DRIV-
ING ARM (1).
TURN THE HANDWHEEL TOWARD YOU TO MOVE THE
SLIDING PLATE BACK AND FORTH.
WHEN THE SLIDING PLATE RETURNS FROM THE
RIGHTMOST POSITION, THE DRIVING ARM (1) SHOULD
BE RELEASED AND RETURNS TO THE “UP” POSITION.
* AFTER INSTALLING THE AUTO THREAD CUTTER,
ADJUST THE POSITION OF THE SLIDING PLATE
(REFER TO PAGE 20).
SETSCREW (A)
SETSCREW (A)
PIN (B)
HOLE
PIN (B)
DRIVING ARM (1)
AUTO THREAD CUTTER
DRIVING ARM (1)
PIN (C) GROOVE OF THE
SLIDING CAM