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.