ELNA E9020 Service Manual

E9020

SERVICE MANUAL

CONTENTS

[1] Product specifications for E9020....................................................................................................................1

[2] Technical explanation......................................................................................................................................4

[3] Index by troubles (mechanical troubles) .....................................................................................................11

[4] How to disassemble the frame components ...............................................................................................15

[5] Adjustment......................................................................................................................................................17

1. Main unit of sewing machine ................................................................................................................................................ 17

2. Embroidering device.............................................................................................................................................................. 40

3. Service mode .......................................................................................................................................................................... 43

[6] Circuit board connection diagram................................................................................................................49

1

[1] Product specifications for E9020

(1) Speed control device

™ Slide control system (soft start) and optional controller system

™ Straight stitching................................................. 115 to 850 rpm

™ Bobbin winding .....................................................Up to 600 rpm

™ Zigzag pattern ......................................................Up to 700 rpm

™ Bartacking on both sides of buttonholes ..............Up to 525 rpm

™ Large pattern sewing, making key

hole buttonholes, lateral feed pattern sewing...... Up to 300 rpm

™ Embroidering At high speed .................. 410 to 800 rpm

At medium speed ..............Up to 410 rpm

At low speed......................Up to 245 rpm

The maximum speed can be set in four stages according to the position of the
slide variable resistor. (800, 750, 600 and 410 rpm)
[In case of embroidering, the sewing speed (rpm) changes over according to the
travel anount of embroidering device STM (two : X and Y), and at medium speed
and low speed, the sewing speed is fixed regardless of the slide controller.]

™ Soft start ................... 115 rpm for approximately 1 second

(2) General mechanism

1. Thread take-up lever............... One-touch utility thread eyelet link thread take-

up lever

2. Hook........................................ Vertical-axis, full rotary hook. The inner hook

is equipped with an idling prevention device.

3. Drop feed ................................ Slide lever type

4. Lighting ................................... Built in the face plate cover and in the center of

main body.
Lamp ... Halogen lamp

5. Needle thread spool rest rod .. Horizontal type

6. Bobbin winder ......................... Slide-type bobbin winder shaft Starts and stops

using the start switch and the stop switch.

7. Needle thread eyelet............... One-touch utility thread eyelet

8. Presser foot............................. Exclusive transparent presser foot Exclusive

presser foot is denoted by the square frame .

9. Power switch........................... Exclusive to the power to the main unit

10. Lubrication .............................. No lubrication is required under the general

operating conditions.

11. Power cord.............................. The power cord is 1.9 m long from the red mark.

(3) Needle throwing mechanism

1. Needle bar rocking system ..... Pendulum + Circular arc

2. Straight stitching ..................... Center stitch base line and right stitch base line

3. Zigzag width............................ 7 mm

4. Zigzag width adjustment......... In increments of approximately 0.3 (0.333) of

0, 0.3, 0.6, 1.0, 1.3, 1.6, 2.0, 2.3, 2.6, 3, 3.3,

3.6, 4.0, 4.3, 4.6, 5, 5.3, 5.6, 6.0, 6.3, 6.6 and 7

5. Needle throwing motion .......... By a stepping motor

actuating method

2

(4) Feed mechanism

1. Feed amount........................... 0 to 5 mm (in increments of 0.1 mm in the range from 0.2 to 1.0 mm, and 1.5 mm, 2.0 mm, 2.3 mm, 2.5 mm, 3.0 mm, 3.5 mm, 4 mm, 4.5

mm and 5.0 mm)

2. Reverse stitching length.......... 0 to 5 mm (for straight stitch) Fixed at 0.5 mm (for the other patterns)

3. Feed amount adjustment ........ By the manual switch mounted on the LCD

Feed amount (pitch) is given on the LCD.

4. Reverse stitching .................... The machine performs reverse stitching at low speed (115 rpm) while the reverse stitching switch is ON.

5. Lateral feed............................. Fixed at 2 mm when a lateral feed pattern is specified.

6. Descending of feed dog.......... Automatically comes down when the embroidering device is set on the machine.

(5) Special-purpose mechanism

1. Automatic thread tension controller

By the thread-feeding stepping motor Manual switch for increasing/decreasing the amount of needle thread of the automatic thread tension controller by a material
thickness sensor (to increase/decrease the amount of thread in 8 steps)

2. Automatic thread trimmer

Lateral STM is actuated by pressing the thread trimming switch so as to bring the thread trimming mechanism in the standby state. Then the hook driving shaft turns one
and a half times (when the machine has stoped with its needle down) or two times (when the machine has stopped with its needle up) by the sewing machine drive motor
and the main shaft is disengaged at the first turn. The machine actuates the thread trimming knife to cut the thread (115 rpm) and stops with its needle up. Disengagement
of the main shaft is released before stop.

3. Automatic backtack sewing

By pressing key after selecting the pattern, backtack sewing is performed at beginning and end of sewing, and the needle and bobbin threads are cut finally.

4. Helpful pictograph

Operation lever, bobbin winder, buttonholing set, running out of needle thread, pattern selection display, inoperative key display, limit of pattern memory display, pattern
in storing, calling display (when the embroidering device is set), needle raising indication, embroidery frame installing indication, embroidery frame changing indication,
embroidery card inserting indication, difference of embroidery carc indication, pattern clearing indication, and bobbin thread remaining amount indication

5. Automatic needle threading mechanism

When setting thread to the thread retaining section of the thread transfer body, threading from the section to needle is automatically performed by pressing the key of
the operation panel.

6. Automatic buttonholing

Auto-return type fully-automatic buttonholing
Buttonhole size detection, automatic stop after backtacking at thge sewing end (backtacked (L ans S) key hole). Buttonholing plate is provided.

7. Bobbin thread remaining amount

Bobbin thread remaining amount is detected by the LED sensor when the bobbin thread is running out, and the message is shown on the LCD. Then the sewing
machine stops.

8. Limit sensor

In order to prevent the bobbin from being excessively wound when automatically winding bobbin, the sensor monitors during bobbin winding and detects that the bobbin
is wound more than the specified amount. Then bobbin winding automatically stops.

3

9. Pattern selection

Direct selection of patterns through a transparent touch panel and indication of selected pattern on LCD.

10. Number of patterns
Practical patterns 53, Continuous patterns 34, Adherence one point 34, One point 168, Lettering characters 4 fonts 450, large pattern 31, practical one point 51

11. Constant-position needle bar stopper
The machine stops with its needle up or down using the synchronizer shield plate and detector (photo-interrupter) mounted on the main shaft.
When the thread trimming presser is raised, when the embridering device is used or when the bobbin is to be wound, the machine stops with its needle up. In a case
other than those described above, the machine stops with its needle down.

12. Prevention of wrong-setting of needle
It is designed so as not to insert the needle in the wrong direction.

13. Operation guide
How to operate the sewing machine, advice and how to sew are indicated on LCD.

14. Prevention of overheat of motor
If the sewing machine motor shaft is locked, the power supplied to the motor is automatically turned OFF after 1 to 1.5 seconds.
If the motor becomes extraordinarily hot in such cases as the sewing machine cotinuously runs at high speed, the thermal sensor built in the motor detects and stops
the machine operation. (The power is turned ON again after the motor has cooled down.)

15. Automatic bobbin winder
When performing the embroidering, exclusive bobbin thread can be wound to bobbin without removing bobbin. In addition, after bobbin winding, threading to bobbin
thread tension spring and thread cutting are performed. Then sewing can continue.

(6) Microcomputer and ROM

32-bit microcomputer .......... 1

Gate array ........................... 1

Flash ................................... ROM 32MB

Flash (patterns)................... ROM 8MB

Embroidering card............... Available from 4MB to 128MB (Smart media)

* Gate array

A large scale and original circuit is necessary for the computer sewing machine. The circuit is built in the IC which is the exclusive one produced for this model only.

(7) Outer dimensions and weight

Main unit ............................. 47.9 cm (width) X 32.4 cm (height) X 21.5 cm (depth) Weight : 12.4 kg

Main unit with case ............. 49.5 cm (width) X 33.0 cm (height) X 23.5 cm (depth) Weight : 13.7 kg

Embroidering device ........... 33.5 cm (width) X 13.0 cm (height) X 32.0 cm (depth) Weight : 2.3 kg

(8) Power consumption

Sewing machinemain unit ... North America territory: 120V 60 Hz
(Lamp only) Mainly Europe territory: 230V 50 Hz

4

[2] Technical explanation

Sewing speed Max. sewing speed in high speed operation ................For straight stitching .........................................................850 ± 50 rpm

For embroidering (at high speed) .....................................800 ± 50 rpm

Low sewing speed in high speed operation .................For bobbin winding ...........................................................750 ± 50 rpm

Max. sewing speed in medium-high speed operation ..For zigzag pattern .............................................................700 ± 50 rpm

When bartacking buttonholes on both sides.....................525 ± 15 rpm

Max. sewing speed in medium speed operation ..........For embroidering (at medium speed) ...............................410 ± 10 rpm

Low sewing speed in medium speed operation ...........For key hole buttonholes, lateral feed patterns, etc. .........300 ± 10 rpm

For patterns which are to be sewn with the needle bar disengaged.

High sewing speed in low speed operation ..................For embroidering (at low speed).......................................245 ± 10 rpm

Low sewing speed in low speed operation..............................................................................................................115 ± 10 rpm

Extra low speed operation.........................................................................................................................................70 ± 10 rpm

™ In case of embroidering, the sewing speed automatically changes over according to travel amount of X-feed and Y-feed of embroidery STMs regardless of the slide

controller. (800, 750, 410 and 245 rpm) Max. sewing speed (800 rpm) is limited according to the position of slide variable resistor.

Start/stop of sewing machine by means of the start/stop switch

(Hereinafter the start/stop switch is called S/S SW.)

™ When a pattern has not been specified, the machine will not start even by turning ON the S/S SW. In this case, the relevant error message will be given with a buzzer.
™ When the S/S SW is used to stop the machine, the machine stops with its needle down in the normal stitching or with its needle up in embroidering.

Start/stop of sewing machine by means of the controller

™ Depress the controller to start the sewing machine. Release the controller to stop it.
™ When the controller is depressed for the first time after turning ON the powwer to the machine, the machine starts with the soft start function. When the controller is

depressed for the second time and beyond, the sofy start function does not work.

™ After the machine has started with the soft start function, the sewing speed gently increases according to the depressing depth of the controller.
™ The sewing machine stops with its needle down if detaching the controller from the receptacle while the sewing machine is turned by operating the controller.
™ While the controller is used, it is impossible to start the sewing machine using the S/S SW. (The switch can be used to stop the sewing machine.)
™ The controller is ineffective during embroidering.

850
750
525
375

115

Sewing speed

rpm

Soft

start

Sewing speed

gently increases.

(At the time of starting the machine)........................................................................ (At the time of stopping the machine)

Low speed (approx. 115 rpm)
Extra low speed

Stop

S/S SW

5

Automatic thread trimmer

™ In case of thread trimming, the machine stops with its needle up after turning the amount equivalent to make one and a half stitches (when the machine has stopped

with its needle down) or two stitches (when the machine has stopped with its needle up). (115 rpm)

™ Make the machine perform steps 1 through 2 using the lateral feed STM, then the sewing machine drive motor will rotate and the thread trimmer will cut the needle

and bobbin threads.

- STM operation steps ­First step 1 Disengage the drawing roller from the auxiliary roller.
Second step 2 Disengage the knife.

3 The sewing machine runs at low speed (115 rpm), and the moving knife cuts the needle and bobbin threads.
4 Disengagement of the main shaft is released and the sewing machine stops with its needle up.

Thread trimming cannot be performed while the sewing machine is in rotation or is ready to stop.

Bobbin winding

1 Set the bobbin winder shaft lever to the bobbin winding position, and the sewing machine motor rotates by turning ON the bobbin winding switch, turning ON the S/

S SW, or depressing the controller. The main shaft is disengaged at the fixed position of the first rotation. The sewing machine is in the state of stopping with its
needle up and only the bobbin winder shaft rotates. (The hook driving shaft rotates.) (Upper limit 600 rpm)

2 While the bobbin winding switch is ON, the relevant message is shown on the display. In this state, any switch other than the S/S SW is not accepted.

Presser foot lift

When the presser foot is raised and S/S SW is turned ON, the relevant message is shown on the display.
Turning ON the S/S SW makes the machine rotate by the amount equivalent to make a half stitch or one stitch and stop with its needle up. At this time, the relevant
message appears on the display.

Pattern selection

The pattern selector switch consists of the analog-type transparent touch-panel, and the range of switch is set tocorrespond with the LCD indication on the rear side.
Press the pattern selector switch, and a group of patterns which corresponds to the switch pressed is shown on the pattern LCD.
If the number of patterns contained in the group is too large to display all of them at a time, the patterns on the LCD can be changed by operating the pattern selector
key, previous screen key or next screen key.
The table below shows the acceptable conditions for embroidering key and selector keys other than the embroidering key.

™ When the utility key is turned ON, straight stitch patterns are selected and they are shown on the memory LCD.

At this time, the patterns stored in memory are cleared.

Effectiveness of the selector key

Effective

Ineffective

Effective
Ineffective
Ineffective
Ineffective

Effective

Effective

Kind of key

Embroidering key

Pattern selector keys
except embroidering key

Installation of embroidering device

£

X

£

X

£
£

X
X

Installation of memory card

£
£

X
X

£

X

£

X

6

Needle throwing

The needle throwing motion is controlled by transmitting an angle of rotation of the needle throwing STM shaft to the needle bar frame by way of link. The time to
compensate the origin of STM is when the needle throws to the left stitch base line as long as the power to the machine is ON.
When the STM is turned beyond the right stitch base line, the needle bar disengaging mechanism actuates.

[Performance of the needle throwing STM]

Material feed (longitudinal)

An angle of rotation of the longitudinal feed STM is transmitted to the cloth feed mechanism as an inclination of the feed adjuster shaft by way of a gear so as to cause
the feed mechanism to feed the material according to the feed amount programed for each kind of stitching pattern.
The feed mechanism is controlled also when the sewing machine is turned by hand.

[Performance of the longitudinal fedd STM]

Lateral feed

The machine performs lateral feed of the material by directly transmitting an angle of rotation of the lateral feed STM (commonly works to control thread trimming) to the
feed dog by way of a link.

[Performance of the lateral feed STM]

Reverse stitching

1) Regular patterns (excluding lateral feed straight stitch patterns, zigzag patterns and embroidery patterns)
Turn ON the reverse stitching switch, and the sewing machine rotates at low speed. The longitudinal feed STM moves the feed adjuster to the reverse stitching
position to move the feed backward. Turn OFF the switch, and the machine stops with its needle down.
The feed amount employed in reverse feed stitching for straight stitching is sama as normal feed stitching.
For a pattern other than straight stitch patterns, the reverse feed amount is fixed at -0.5 mm.

2) Lateral feed patterns (lateral feed straight stitch patterns and lateral feed zigzag patterns)
Turn ON the reverse stitching switch, and the sewing machine rotates at low speed. At this time, the longitudinal feed STM moves to the position at which the feed
mount is set to 0 mm. Now, the lateral feed STM actuates to feed the material in the reverse direction.

Thread tension release 1

Knife is disengaged.

Lateral feed

Origin

Thread tension

release 2

Right-hand side
of feed dog

Left-hand side of feed dog

-5 mm

+5 mm

Longitudinal feed

Origin

Needle throw

Main shaft is is

disengaged.

Left stitch base line (origin)

Right stitch
base line

7

Embroidring device

1) The machine is fed, when embroidering, by the X feed STM and Y feed STM. An angle of rotation of each STM is transmitted, by means of a gear and belt, to the
embroidery frame as a linear travel amount in X/Y direction. This causes the machine to sew an embroidery pattern.

2) When a large, medium or small embroidery frame is installed on the machine, three frame detection switches are turned ON or OFF, and the machine determinates
the possible range of layout of the patterns that can be sewn in accordance with the size of embroidery frame, i.e., large, medium or small, installed.
In addition, the number of patterns and letters that can be stored in memory is automatically restricted in accordance with the embroidery frame installed.

3) When the embroidering device is used with the machine, the controller is rendered ineffective and the reverse stitching switch is inoperative.
The maximum speed can be changed over in four steps with the slide variable resistor.

4) If the presser foot is in the lowest position after the power to the machine has been turmed ON, the pictograph "raise presser foot" will be given on the display. If the
needle is in the lowest position, the pictgraph "raise needle" will be shown. The S/S SW is rendered ineffective.

5) If you turn the machine by hand after having selected a pattern, the machine will not perform pattern sewing. Once the S/S SW is turned ON, you are allowed to turn
the machine by hand so as to make the machine perform pattern sewing until the machine completes the pattern. After the completion ofthe pattern sewing, it is
impossible to make the machine perform pattern sewing by turning the machine by hand.

6) The sewing speed automatically changes over, during embroidering, in accordance with the travel amount of the embroidery feeding frame. (800, 750, 410 and 245 rpm)

7) To move the needle by a distance as long as 11 mm (jump) during embroidering, the sewing machine is stopped and only the embroidery frame is moved by the
distance.

8) The micro-switch is used for the detection of the origin.

9) A micro-switch is mounted on the ejection lever, and it informs the micro-computer to cut the power supply to the embroidering device STM before the terminals of
the embroidery and the main unit are drawn. This is a protective circuit not to badly affect the electronic components when the terminals are improperly connected
or they are drawn during sewing.
In addition, when the ejection lever is improperly inserted, the embroidering device does not work. So, be careful.

Automatic thread tension control

1) The automatic thread tension control is carried out by the following.

1 Pattern data (Zigzag width and feed amount are automatically specified by making a choice of a pattern to be sewn.)
2 Material thickness detecting potentiometer
3 Thread drawing stepping motor

Based on the data provided by 1 and 2, the optimum drawing amount of needle thread for every rotation of the sewing machine is calculated by a microcomputer.
The set amount drawing stepping motor rotates, draws the needle thread put between the drawing roller and the auxiliary roller and controls the amount of thread to
be used for sewing the material.

2) Rotate the machine by the amount equivalent to the sewing of several stitches by turning ON the S/S SW or operating the machine by hand, and the slack of thread
will be removed. The automatic thread tension control function works when the thread breakage detection photo-sensor becomes open.

3) For overedging, embroidering, and two color stitching, the thread drawing amount is computed using the respective operation expressions to allow the machine to
adapt to the respective sewing patterns.

4) To correct error in the actual feed amount of the material feed mechanism, sew a straight stitch pattern with the feed amount indication set to 2 mm and measure the
actual feed amount. Then adjust the feed compensating switch in accordance with the difference between the specified amount and the measured feed amount. This
corrects the operation expression used by the microcomputer.

8

Memory

1) When a pattern or a letter is selected, it is automatically stored in memory.

2) The maximum number that can be stored in memory is 120. For the embroidery patterns, the number of patterns to be sewn changes in accordance with the size of
the frame or the size of the patterns stored in memory, and the limit ofthe number of patterns stored in memory is automatically computed and set.

3) The one-point pattern stitching pattern cannot be stored in memory or retained as the continuous pattern mode or the pattern mode.
Pattern selection + continuous key + pattern selection
Pattern selection + continuous key + retaining key
* For the retaining key, refer to the next page.

4) The vertical writing mode can be used for kana letters, Chinese characters and numerals. The embroidery patterns are effective for all patterns stored in memory.

File (save) and calling keys

1) The saving function saves a series of patterns stored in memory after the power to the machine is turned OFF. Once the power is re-turned ON, the saved patterns
can be called for sewing.

Turn ON the pattern case key to select and turn ON the save key. Then the patterns that have been stored in memory for the patterns other than embroidering
and the combined patterns for the embroidering are stored in the file of the specified No. in non-volatile memory (flash memory), and the data are saved even after
the power to the machine is turned OFF.
The condition of patterns which has been simultaneously stored in memory with the patterns such as inversion, increase, decrease, two colors, small letter, vertical
writing, vertical setting, rotation, letter interval, layout condition, etc. and the kind of embroidery frame are saved.
The file that has been saved once cannot save other patterns until the patterns saved in the file are erased.

2) If the embroidery frame installed on the machine, when calling the pattern with the calling key, is smaller than the one when it has been saved in the memory, editing
can be performed by the edit screen. Sewing cannot be performed, however, unless re-editing is peformed so that the pattern can enter inside the frame. In this case,
the error message will appear on the display.

3) Saving and calling under the embroidering mode is effective regardless of the patterns, kind of the embroidery card, built-in patterns or card patterns.

Disengagement of main shaft

1) Disengagement of the main shaft is performed by actuating the main shaft disengaging link by means of the needle throwing STM to disengage the rotation power
to the main shaft.

2) When the data of disengagement of main shaft occurs (70˚), the needle throwing STM starts driving from 287˚ and completes the motion by 0˚.

3) By the step 2) motion, the main shaft disengaging link moves to the disengaging position. (The STM completes the motion by 0˚.)

4) When the main shaft turns in the normal direction in the state that the main shaft disengaging link is in the disengaging position, the main shaft disengaging cam
slides by the main shaft disengaging link. The main shaft hand wheel and the main shaft are disengaged from each other, and the rotation power is cut.

: In this case, error message is given.

9

5) The main shaft which has been disengaged stops at 40˚ to 50˚ by the main shaft disengaging stopper.

6) Main shaft returns from disengagement when the data other than the disengagement of main shaft occur (70˚), the needle throwing STM starts driving at 287˚ and
the main shaft disengaging link moves to the waiting position.

7) The main shaft disengaging cam slides by the main shaft disengaging cam spring and comes in contact with the main shaft hand wheel.

8) When the main shaft rotates by 30˚ to 70˚ in the normal direction in the state that the main shaft comes in contact with the main shaft disengaging cam, the main shaft
disengaging cam slides further by the main shaft disengaging stopper and the main shaft hand wheel is joined together with the main shaft. As a result, the rotation
power is connected.

Automatic needle threading of machine head

1) Automatic needle threading mechanism is actuated by the exclusive threading stepping motor and the lateral feed stepping motor.

2) The automatic needle threading is carried out by the following.

1 Thread transfer body section ........transfers the needle thread from the waiting position located on the upper side of the sewing machine.

2 Needle eyelet threading section ...passes the needle thread which is drawn in front of the needle eyelet to the needle eyelet, and puts the thread on the needle

clamp thread guide.

3 Threading section of thread take-up spring .... puts the needle thread which is drawn by the thread transfer body to the thread take-up lever and the the thread

take-up spring.

3) The possible range of automatic needle threading is 36˚ to 54.5˚. When the needle threading key is pressed within this range, the automatic needle threading
mechanism starts working. A series of motions is as described below.
1 Interlocking with the rotation of the lateral feed stepping motor, the drawing roller and the auxiliary roller separate from each other.

At the same time, the drawing stepping motor is joined together with the threading body.

2 The thread transfer body comes down and rotates. (The threading STM starts rotating in the normal direction.)
3 The needle eyelet threading section comes down following the descending thread transfer body.
4 The thread transfer body stops in the state that the needle thread is drawn in front of the needle eyelet.

At this time, the needle threading hook stops descending at the position of needle eyelet as well.

5 The needle threading hook rotates and enters the needle eyelet. At the same time, the needle clamp thread hook arm catches the needle thread and pushes the

needle thread to near the entrance of the needle clamp thread guide.

6 By the rotation of the drawing STM, the threading body catches the needle thread and rotates. Then the threading body stops at the entrance of the thread take-

up spring. (The threading body detects the stop position by opening the needle thread breakage detection shield plate.) At this time, the needle thread is put to
the thread take-up lever and the drawing roller.

7 The threading STM starts rotating in the reverse direction. The thread transfer body rotates and goes up.

At the same time, a) the needle threading hook catches the needle thread and psasses it to the needle eyelet.

b) The needle clamp thread hook arm returns to its home position after leaving the needle thread in the needle clamp thread guide.

8 When the lateral feed stepping motor returns to its home position, interlocking of the threading body with the drawing stepping motor is released and the

threading body returns to its home position by means of the force of the spring. At this time, the needle thread is left in the the thread take-up spring.

9 The thread transfer body stops at the upper waiting position (origin) and the automatic needle threading completes.

10

Automatic bobbin winding

™ Automatic bobbin thread winding from the exclusive thread (for embroidering only)

Guide the exclusive bobbin thread which has been set to the front panel to the bobbin in the hook, rotate the bobbin and wind the thread. After completing the bobbin
winding, threading to the inner hook and cutting of the needle thread are performed by means of the reverse rotation of the outer hook. This is thread winding
exclusive for for embroidering, and the applicable thread is limited to SHAPPESPAN #90.

(1) Automatic bobbin thread winding (exclusive thread) is carried out by the following.

1 Driving section of thread retaining plate ........... This section catches needle thread and drives the thread retaining plate which guides the needle thread to

bobbin.

2 Transmitting section of rotation of bobbin ......... Change-over of transmission and release of joint of driving of rotation of bobbin.

3 Re-retaining section of thread retaining............ After completing winding, thread is stretched between the bobbin and the thread retaining plate when the thread

retaining plate travels backward up to the re-retaining position. This thread is pushed in the retaining section at
the top end of thread retaining plate by means of the inclined plane on the hook of outer hook. (For next bobbin
thread winding)

4 Threading section of inner hook ....................... After completing bobbin winding, threading to bobbin thread tension spring is performed with the hook of outer

hook which is fixed on the outer hook.

5 Bobbin thread utting section ............................. After completing threading the inner hook, bobbin thread is cut with the outer hook fixed knife which is fixed on

the outer hook.

6 Control section of amount of bobbin winding.... Setting of [S] or [M] of the amount of bobbin winding is controlled by the number of times of bobbin winding and

when [L] is set, bobbin winding is executed until the winding diameter sensor detects the amount. There is the
upperlimitation on amount of bobbin winding even when [L] is set, and bobbin winding stops before the sensor
detects when the limitation on amount is reached.

(2) Conditions of start of automatic bobbin winding

• Main shaft timing ......... 36˚ to 54.5˚

• Presser foot................. Lower position

(3) Performance

Operator performs threading to the thread retaining plate for the exclusive bobbin thread using the threading guide supplied as an accessory.
1 Press the bobbin winding start button and the sewing machine rotates after the main shaft has been disengaged. Then checking whether thread remains in the

bobbin is executed.

2 When bobbin thread does not remain, the thread retaining plate enters on the inner hook while retaining the exclusive thread.

Lift the bobbin driving gear to rotate bobbin. Then the exclusive thread which has been retained by the thread retaining plate is induced into the bobbin slit to be
wound in the bobbin.

3 When the specified amount of bobbin winding is reached, bobbin winding completes. The thread retaining plate travels backward and moves to the re-retaining

position.
At this position, the bobbin driving gear keeps the joined state.

4 Thread is stretched between the bobbin and the thread retaining plate, and the thread is pushed in the retaining section at the top end of of thread retaining plate

by means of the inclined plane of the hook of outer hook through the normal rotation of the outer hook.

5 Outer hook rotates in the reverse direction. The hook of outer hook catches the thread connecting from the bobbin to the thread retaining plate and draw it around

in the reverse direction of rotation. Then the thread is put on the inner hook thread guide.

6 At the timing when the inner hook threading is completed, the outer hook fixed knife which is attached to the outer hook cuts the thread between the hook of outer

hook and the thread retaining plate.

7 Bobbin thread winding completes in the state that it is possible to continue sewing.

11

Item to be checked
P-17 (2) Height of the presser foot P-20 (5) Inner hook detent
P-20 (6) Height of the feed dog P-21 (8) Base tensio P-46 W. Adjusting the material thickness
P-43, A Adjusting the actual feed amount P-26 (17) Bobbin thread tension

P-17 (2) Position of the presser foot P-18 (3) Height of the needle bar P-18 (3) Needle-to-hook timing
P-19 (4) Clearance between the needle and the hook P-26 (18) Timing belt

P-18 (3) Height of the needle bar P-18 (3) Needle-to-hook timing P-20 (5) Inner hook detent plate

P-17 (1) Needle entry

P-17 (2) Height of the presser bar P-20 (6) Height of the feed dog

P-17 (1) Needle entry P-19 (4) Clearance between the neeedle and the hook
P-26 (18) Timing belt

P-27 (20) Disengaging the main shaft P-45 E Longitudinal feed and lateral feed P-27 (21) Main shaft disengaging stopper

P-21 (8) Base tension P-23 (12) Adjusting the knife disengagement P-24 (13) Lateral position of the thread trimmer cam
P-24 (14) Moving knife guide (Upper) P-25 (15) Moving knife guide (Lower)
P-25 (16) Height of the looper P-26 (17) Bobboin thread tension P-26 (18) Timing belt

P-26 (18) Timing belt P-28 (22) Motor belt

P-27 (19) Buttonhole

P-33 (25) Automatic bobbin winding device

P-28 (23) Needle threader

P-40 1 Replacing procedure of the motor P-41 2 Adjusting the belt P-41 3 Adjusting the origin

[3] Index by troubles (mechanical troubles)

Phenomenon

Defective thread tension

Stitch skipping

Thread breakage

Hitched stitch

Defective feed of the material

Contact of the needle

Pattern shape

Automatic thread trimmer

Noise

Buttonhole

Bobbin winder

Needle threader

[Embroidering device]

12

Trouble
Needle thread comes off the
thread retaining section when
the transfer body rotates and
comes down.

Thread fails to pass the needle
eyelet.

Thread is not caught by the
needle clamp thread guide.
Needle thread fails to enter the
fork end.

The needle clamp thread guide
fails to catch thread.
Thread deflects to the inside of
the thread guide and cannot be
caught.

The needle clamp thread guide
fails to catch thread.
Thread deflects to the outside
of the thread guide and cannot
be caught.

1

2

3

-1

3

-2

3

-3

Automatic needle threading (trouble and corrective measure)

Cause
The set needle thread does not enter up
to the root of shaft and is narrowly retained
at the top end.

The retaining pressure does not become high.
Turn OFF the power, and turn the driving shaft
counterclockwise. The retaining pressure change­over plate works and the spring is compressed to
increase the retaining pressure.

Height of the threading hook is improper.
Thread tensed in front of needle is not in the center of needle eyelet at the
lower position of the transfer body.
Longitudinal position of the transfer body in terms of needle is not proper at
the lower position of the transfer body.
Thread retaining section is open at the lower
position of the transfer body.

The base tension is open when threading.
The base tension is open when threading.
The position of needle clamp threading arm is too high.

The transfer body is attached to the left side.
Longitudinal position of the transfer body is

improper. Front and rear

The transfer body is attached to the left side.
The position of needle clamp threading arm is too high.
The thread path control plate is attached to the left side.

The transfer body is attached to the right side.
The position of needle clamo threading arm is too low.
The thread path control plate is attached to the right side.

Corrective measure
Adjust the retaining pressure at the upper position referring to
(24)-1-3).

When the spring is not compressed, check the adjustment of the
retaining pressure change-over link referring to (24) -2-4).

Check the adjustment of the needle threader referring to (23).
Check the vertical adjustment of the lower position referring to
(24)-2-3).
Check the longitudinal adjustment of the lower position referring
to (24)-2-2).
Check the adjustment of the retaining pressure change-over link
referring to (24)-2-4.

Check the adjustment of the base tension referring to (8).
Check the adjustment of the base tension referring to (8).
Check the adjustment of the height of needle clamp threading
arm referring to (24)-3.
Check the lateral adjustment of the transfer body referring to
(24)-4.
Check the longitudinal adjustment of the lower position referring
to (24)-2-2).

Check the lateral adjudstment of the transfer body referring to
(24)-4.
Check the adjustment of the height of needle clamp threading
arm referring to (24)-3.
Adjust the thread path control plate referring to (24)-5.

Check the lateral adjustment of the transfer body referring to
(24)-4.
Check the adjustment of the height of needle clamp threading
arm referring to (24)-3.
Adjust the thread path control plate referring to (24)-5.

(a)

(b)

(a)
(b)

(c)
(d)

(e)
(a)
(b)

(c)
(d)

(a)
(b)
(c)

(a)
(b)
(c)

Front and rear

Needle thread

13

4

Cause

Malfunction of the threading body

Malfunction of the base tension
Malfunction of the mis-threading preventing plate
Rising amount of the auxiliary roller cover

Corrective measure

• Installing position of the face plate is improper.

• The face plate inside cover is moved to the right.
(The face plate installing plate is slantly attached.)

• Defective change-over of STM

• Check the motion of the base tension.

• Check the motion of the mis-threading preventing plate.

Trouble
Defective threading to the
thread take-up spring and
thread take-up lever

(a)

(b)
(c)
(d)

14

1

2

3

4

Cause
The hook cocer is not attached.
Threading to the thread retaining plate is not correct.

Retaining force of the thread retaining spring is too low.

After starting thread winding, the thread which has come out of the bobbin slit
passes the upper side of “U” letter at the top of thread retaining plate A and
comes off the thread retaining spring.
Bobbin fails to rotate.

There is a scratch on the inner hook and thread is caught with it.
Thread is caught with the inner hook detent plate and runs around.

Threading has not completed and the bobbin thread is removed by the needle
thread.
Threading has completed, but the thread cannot be drawn out since thread
end is drawn in and comes out from the entrance side.
There is a scratch on the inner hook and thread is caught with it.
Thread is caught with the inner hook detent plate and runs around.

The outer hook fixed knife is dull.
The bobbin thread tension is too low.
Tension on the side of spool for exclusive thread is too low.
Thread slackens when pushing the thread with the hook of outer hook.

A scratch on the hook of outer hook
Tension of thread retaining plate A is too high.

Corrective measure

• Attach the hook cover.

• Check whether threading to the thread retaining plate is as
shown in the threading diagram.

• Check whether threading is made to the lower side of thread
retaining plate hook.

• Adjust the height of thread retaining plate A referring to (25) -1.
Check the deflecion of thread retaining spring.

• Check the retaining force of thread retaining plate A (asm.) only.

0.64 to 0.88N (65 to 90g) wax coated thread #80.

• Check the position of thread retaining plate A hook.

• Malfunction of the gear connecting link

• Deformation of the gear connecting link plate spring.

• Correct the inner hook.

• Correct or replace the inner hook detent plate.

• Adjust the inner hook detent plate (longitudinal direction)
referring to (6). If it is excessively moved to the forward direction,
thread is caught with it.

• Same as (a) and (b) above.

• The hook cover pile is excessively tilted.

• Same as (a), (b) and (c) above.

• The feed bar pile fails to retain thread.

• Correect the inner hook.

• Correct or replace the inner hook detent plate.

• Adjust the inner hook detent plate (longitudinal direction)
referring to (6). If it is excessively moved to the forward direction,
thread is caught with it.

• Replace the outer hook fixed knife.

• Adjust the bobbin thread tension referring to (17).

• Check the thread winding tension plate or bobbin thread guide.

• The position of gear connecting link stopper is improper and
the bobbin driving gear is disengaged.

• Bobbin rises and the gear is disengaged.

• Check the inclined plane of the hook of outer hook.

• Check the retaining force of thread retaining plate A (asm.) only.

0.64 to 0.88N (65 to 90g) wax coated thread #80.

Trouble
Thread fails to be wound in
bobbin.

Thread is not caught by the
inner hook thread guide.

Bobbin thread fails to cut.

Thread is not retained to thread
retaining plate A after completing
thread winding.

(a)
(b)

(c)

(d)

(e)

(a)
(b)

(c)

(d)

(a)
(b)

(c)
(d)
(e)
(a)

(b)
(c)

Automatic bobbin winding (trouble and corrective measure)

Bobbin thread winding from the exclusive bobbin thread

15

D. Under cover

• Loosen screws 1 and 2.

B. Belt cover

• Remove screws 1, slantly insert
a thin screwdriver into the hook­ing section C and push in the di­rection of arrow mark to remove
the cover.

A. Face plate cover

• Loosen screws 1 and 2.

• Remove claw section A and B
using a thin screwdriver or the
like.

[4] How to disassemble the frame components

C. Free arm bottom cover

• Loosen screws 1 and 2.

E. Front panel

• Loosen screws 1 and remove the needle plate.

• Remove screws 2 and loosen screw 3.

• Drawing section A in the -> direction, insert a thin screwdriver into section C and
remove the claw.

• Applying force to section A in the -> direction, insert a thin screwdriver into section D
and remove the claw.

• Remove claw section E located at the jaw section while lowering the rear panel.

• Remove connectors 4, 5, and 6 connected from the front panel to the microcom­puter circuit board.

• When drawing out the flexible card connector 7, draw it out after lock of connector
6 has been released.

• Remove connector 8 connected to the inverter circuit board.

A

B

E

C

A

B

C

2

1

1

1

2

1

2

3

4

5

6

7

2

2

D

1

8

16

I. Frame of embroidering device

• Remove screws 1 through 7.
Pressing (a), pull (b).

H. Face plate cover

• Remove screws 1 and 2.

F. Rear panel

• Loosen screw 1 and
remove screw 2.

G. Bottom plate

• Remove screws 1 through 5.

• Remove screws 3 and 4.

• Lower presser lifting lever 5.

• Lift handle 6, draw section 7 and
remove the rear panel.

• Remove claw section 8 with the
under cover.

• Loosen 9 and tilt !0.

1

2

3

4

5

6

7

8

9

!0

1

2

3

4

5

1

2

(a)

(b)

1

2

3

4

5

6

7

17

[Height of the presser bar]
Loosen screw 1 and move the presser bar up or down to adjust so that a
clearance of 6.3 ± 0.2 mm is provided between the throat plate and the
presser foot when the presser bar lifting lever is raised.
(Note) • Do not make a scratch on the rack with the hexagon wrench

key.

• After the aforementioned adjustment, the material thickness
shoud be adjusted (see “service mode P-42, W).

• If the presser bar fails to smoothly go up and come down, pressure of
the presser foot applied to the material will will be reduced. As a result,
the specified feed amount cannot be obtained. Furthermore, the material
thickness cannot be detected, resulting in defective thread tension.

[Position of the presser foot]
The presser foot should be positioned in parallel to the feed dog and also
the slot in the presser foot should be almost aligned with the slot in the
throat plate.

• If the slot in the presser foot is not aligned with the slot in the throat plate,
the material will not be securely clamped. In this case, the material will
enter the slot in the throat plate when the needle penetrates the material.
(Defective feed of material : A cause of stitch skipping, hitched stitches,
etc.)

Specify the straight stitching. (Bring
the needle to the left stitch base
line.) Loosen 1 and turn 2 to
adjust.

• If the needle entry point shifts a
little to the left from the center of
the groove on the plate, hitched
stitches will be produced. So, do
not allow the needle to shift to the
left from the center of the groove.
(Fig. 1)

• Select the pattern shown in (Fig.

2). In this case, the needle should
not come in contact with the throat
plate when when it throws to the
rightmost end of its stroke.

A through E on page 15

(2) Height of the presser bar and the position of the presser foot

[5] Adjustment

1. Main unit of sewing machine

(1) Needle entry

How to adjust Disassembly

Location of components to be adjusted

Adjustment drawing

3.5 3.5

How to adjust Disassembly

Location of components to be adjusted

Adjustment drawing

H on page 16

2.5 mm
hexagon
wrench key

1

Groove on the plate

Straight
stitching

Fig. 1

Fig 2

Use service
mode H to select
the pattern.

Pattern
selection

Center

6.3 ± 0.2 mm

0.05 to 0.35

0.2 to 0.5

Initial state

1

2

Left Right

18

(3) Height of the needle bar and the needle-to-hook timing

[Confirming the timing between the main shaft and the hook driving shaft]

• Confim that the needle bar is positioned in the lowest dead point when the marker
dot on the thread cutter cam is aligned with the hook driving shaft ball bearing.

[Confirming the timing of the outer hook]

• In the aforementioned state, confirm that the marker dot of the outer hook (when
removing Mg sheet) faces just behind. (It is not necessary to check when the outer
hook is not removed.)

Adjustment drawing 1
Prepare two kinds of the jig needles of 29.1 mm and 32.7 mm long which have been
cut from the home use needles (SCHMETZ needle).
* Perfotrm the adjustment after adjusting the needle entry following the point of (1).

1. Attach the jig needle (29.1 mm) to the needle bar.

2. Set the needle to the left stitch base line, loosen needle bar connection screw

1 and adjust the height of the needle bar so that the jig needle (29.1 mm) is
aligned with the upper face of the race of outer hook when the needle bar is
positioned in the lowest dead ppoint.

Adjustment drawing 2
Replace the jig needle with that of 32.7 mm. Raise the needle bar and adjust so that
the center of the needle is aligned with the balde point of hook when the top end of
needle bar is aligned with the upper face of the race of outer hook. Then tighten
screw 2 in the hook driving shaft pulley.

29.1 mm

How to adjust Disassembly

Location of components to be adjusted

Adjustment drawing 1

Needle bar
connection

2 mm hexagon
wrench key

Free arm bottom cover and throat plate

Main shaft

Hook driving
shaft

Hook driving

shaft pulley

Adjustment drawing 2

32.7 mm

Thread cutter cam

Marker dot

Marker dot

Projection

1

2

1

2

19

(4) Clearance between the needle and the hook

• Confirm that the clearance is provided between the needle and blade point
of hook. Loosen screw 1 and finely adjust the clearance by turning
adjustment shaft 2. (It is possible only when the presser pressure is max.)

[Lateral balnce]
Adjust the balance between the right/left needle and the blade point of hook.

<Reference>

• Select the service mode P40, H (Needle throw to left, center and right)
Provide a sufficient clearance between the left or right needle and the hook,
and turn ON the start/stop switch.

• Gradually turning adjustment shaft 2, temporarily tighten screw 1 at the
position where the needle slightly comes in contact with the hook.

• Slightly moving lateral adjustment plate 4, adjust the lateral balance of
the needle bar depending on the noise which comes from the contact of
the left or right needle with the hook.

• Furthermore, turn adjustment shaft 2, and securely tighten screw 1 at
the position where the needle does not come in contact with the hook.

• Press 3 with your finger and when the noise comes from the contact of
the left or right needle with the hook, the clearance between the needle
and the hook is the best dimension.

How to adjust Disassembly

Location of components to be adjusted

Adjustment drawing

Shift 4 to the right when
the right is larger.

Shift 4 to the left when
the left is larger.

A to E on page 15

(At the time when adjusting the

balance of left and right)

0.03 to 0.07 mm

Right stitch
base line

Left stitch

base line

Right stitch
base line

Left stitch

base line

1

3

4

2 Adjustment shaft

20

[Longitudinal adjustment]

Loosen screw 1 in the inner hook detent, and align it with the
position in [Enlarged view of the related portion].

[Adjusting the direction of rotation of the inner hook]

Refer to the item of the automatic bobbin winding.

Confirm that a thread can come off the clearance provided between
the detent plate (left) of the inner hook and the inner hook , and the
clearance provided betweeen the hook cover support plate (right)
and the inner hook in terms of the direction of rotation of the sewing
machine.
(Perform the adjustment with thread #20 for jeans stitch when
installing the throat plate.)
Do not apply oil tp the race surface of outer hook and the race surface
of inner hook.
If they are applied with oil, the outer hook is closely fitted against the
inner hookbecause of oil. This will impair smooth slip-off of the thread
from the hook.

(5) Inner hook detent (longitudinal direction)

Center is when these lines are aligned
with each other.
Error : ± 0.3 mm

How to adjust Disassembly

Location of components to be adjusted

Adjustment drawing

Throat plate

[Enlarged view of the related portion]

How to adjust Disassembly

Location of components to be adjusted

Adjustment drawing

• Turn the handwheel until the feed dog projects the
most. Now, loosen 1 and turn screw 2.

• Set the feed amount to “0”.

• Confirm that the height of the feed dog is adjusted to

1.1 ± 0.1 (with no load applied) at the rear end of the
feed dog.

(6) Height of the feed dog

1.1 ± 0.1

Rear side of the
sewing machine

Protruding amount of the feed dog 1.1 ± 0.1
(with no load applied)

Free arm bottom cover

1

2

1

21

[Presser lifting lever] Adjustment drawing (A)
Loosen screw 1 and move 2 up or down. Then adjust
so that the extension amount between the drawing
roller and the auxiliary roller should be 3 to 5 mm when
the presser lifting lever is raised.

[Thread release cam] Adjustment drawing (B)
Loosen screw 4, turn 5, and adjust so that the
extension amount between the drawing roller and the
auxiliary roller should be 4 ± 0.5 mm when thread
release cam 3 is turned and the center rib is brought
to the highest position.

(7) Extension amount between the drawing roller and the auxiliary roller

How to adjust Disassembly

Location of components to be adjusted

Adjustment drawing (A)

3 to 5 mm

4 ± 0.5 mm

A to F on pages 15 and 16

When cam rib is hingest.

Adjustment drawing (B)

How to adjust

Disassembly

Location of components to be adjusted

Adjustment drawing

(8) Base tension

A to F on pages 15 and 16

Projection

Base tension floater

Marker line

Thread
release cam

• Connect the SW jig for testing to CN1 of
the microcomputer circuit board.

• Turn ON SW-C in the SW jig for testing on
P45, and the lateral feed STM rotates to move
the thread release cam to psition 2.
At this time, loosen screw 2 in the thread
release link adjusting plate, turn thread
release adjusting plate 1 and adjust so
that the projection of thread release cam
3 is positioned to the marker line on the
base tension floater as shown in the figure.

Observe from the lightning hole of the
drawing STM installing plate on the from side
of the sewing machine.

1

2

3

4

5

1

2

3

22

(9) Change-over of the drawing STM

How to adjust Disassembly

Location of components to be adjusted

Adjustment drawing

Connect the connector of the front panel only,
set the main shaft to 180˚, and turn ON “S”
of the service mode in the state that the front
panel and the rear panel are removed.
The lateral feed STM rotates and the thread
release cam turns.
At this time, loosen screw 3 and adjust with

4 so that the clearance provided between
1 and 2 should be 1 -2 mm.

(10) 1 stitch switch

A to F on pages 15 and 16

Adjust while looking from this hole.

This switch detects the UP state of the presser lifting lever.

• When the presser lifting lever is UP, the 1 stitch SW should be pressed.

• At this time, the clearance between the lever and is “0” and the lever should notpress the
switch excessively.

• When the presser foot is in DOWN position, the switch should not be pressed.

Loosen screw 1 and move the switch to meet these conditions.

A to F on pages 15 and 16

How to adjust

Disassembly

Location of components to be adjusted

Adjustment drawing

1 to 2 mm

1

2

3

4

1

23

(11) Position of the looper

Set the sewing machine to its highest dead point. In this state, loosen screw 3 and adjust so that the play provided between 1 and 2 should
be 0.5 to 1 mm. (Required value is 0.5.)

(12) Adjusting the knife disengagement

Disassembly

Location of components to be adjusted

Throat plate

How to adjust Disassembly

Location of components to be adjusted

Throat plate and free arm bottom cover

How to adjust

Pressing 4 in the direction of arrow, turn the hook
driving shaft pulley by hand to actuate the moving
knife. Loosen 1 and adjust 2 so that the clearance
provided between the looper and the moving knife
base should be 0 ± 0.2 mm when the moving knife
returns, and the end of the left slot of moving knife
base aligns with the corner section of looper as shown
in the illustration below.

<Confirm the looper operation.>
When the looper operation is wrong, loosen screw
3 and adjust so that the looper is located to the
smooth operating position.
* When 3 is loosened, re-confirm the clearance

provided between the moving knife and the looper.

3

4

Adjustment drawing

0 ± 0.2 mm

1

2

To align

24

(13) Lateral adjustment of the thread trimming cam

• Slightly loosen nut 1. • Turn 3 and adjust so that the clearance provided
between the moving knife base and the looper is 0.3 to
1 mm when the moving knife travels to the rightmost
end. After the adjustment, tighten nut 1.

• Keep pressing 2 with your
finger, turn the sewing
machine by hand.

How to adjust Adjustment drawing

0˚

0.5 to 1 mm
(Required value is 0.5)

1. Adjust so that the root of the blade section of the guide plate in terms of the root of the blade section of the moving knife enters to the rear by 0.5 mm when
the moving knife starts and travels backward from the rightmost end as shown in the figure.

2. Loosen screw 1 and adjust the longitudinal position so as to align the front end of the square hole in the moving knife guide plate (upper)
with the blade point of the moving knife.

3. Adjust so that the clearance provided between section A of the moving

knife support and the moving knife is 0.02 to 0.07 mm in the state that
the moving knife is fully protruded.
Then tighten screw 1.

(14) Moving knife guide plate (upper)

How to adjust Disassembly

Location of components to be adjusted

Adjustment drawing

Throat plate

A

Align

180˚

1

2

3

1

2

3

1

2

3

0.5 mm

1

A

Moving knife support

0.02 to 0.07 mm

0.3 to 1 mm

Position where moving knife
travels to the rightmost end.

25

Loosen screws 1 and 2 on the left stitch base line and tighten screw 2 to adjust so that the clearance provided between the needle and the
moving knife guide plate (lower) is 0.5 to 1 mm.

* When tightening screw 1, perform the adjustment of (14) Moving knife guide plate (upper).

(15) Moving knife guide plate (lower)

Moving knife
guide plate
(lower)

Needle

0.5 to 1

(16) Height of the looper

How to adjust Adjustment drawing

How to adjust Disassembly

Location of components to be adjusted

Adjustment drawing

Adjusting the height of the looper
(thread retaining at the time of thread trimming)

Loosen the setscrew to adjust so that the clearance provided
between the looper and the top end of the bobbin stopper is 0 to

0.1 mm when the looper is brought to the lowest position of its

stroke.
(Set a bobbin to the inner hook.)

Inner hook

Bobbin stopper

Throat plate

Setscrew

Looper

1

2

0 to 0.1 mm
(Clearance between looper and top end
of bobbin stopper)

26

(17) Bobbin thread tension

How to adjust

Disassembly

Location of components to be adjusted

Adjustment drawing

Level the
inner hook.

0.127 to 0.147 N (14 g ± 1 g)

A tension gauge is necessary to measure the bobbin thread tension.
Type of thread : SHAPPESPAN #60
Amount of thread to be wound round a bobbin : 40 to 50%
Remove the inner hook. Place the gauge as shown in the adjustment drawing and measure the
tension at a constant speed.

Throat plate

1) Adjust the longitudial position of 1 so that the

belt tension is 3 to 4 mm with 0.98 N (100g)
load, and tighten screw 2.

Note) When performing this adjustment,

confirm the needle-to-hook timing.

(18) Timing belt

How to adjust

Disassembly

Location of components to be adjusted

Adjustment drawing

Free arm bottom cover and belt cover

Draw the thread
out from this
plane through a
narrow clearance
made on it, and
measure the
bobbin thread
tension.

0.98 N (100 g)
3 to 4 mm

2

1

27

Slightly loosen screws 3 and 4. move the buttonholing switch (BH SW) in the direction of the
arrow to adjust so that, when the buttonholing change-over lever is pressed against the projection
of the buttonholing foot, the contact point on the stop side of the buttonholing switch (BH SW) is
spaced 0.1 to 0.3 mm from the stopper.

• The stitch made at the end of right-hand parallel sectionof a buttonhole should not go beyond

the first bartacks, or should not leave any space between the stitch end and the bartacks.

(19) Buttonholing

0.1 to 0.3

How to adjust

Disassembly

Location of components to be adjusted

Adjustment drawing

1) Provide a clearance of 1.6 mm between the main shaft hand wheel and the main shaft

disengaging cam.

2) Loosen adjustment screw 1 in the main shaft disengaging

stopper, make the top end of the main shaft disengaging
stopper come in contact with the stopper spring section of
the main shaft disengaging cam, and tighten adjustment
screw 1 in the main shaft disengaging stopper.

3) After the adjustment, apply grease to the sections below.

(1) Joint of the main shaft disengaging cam and the main

shaft hand wheel
(2) Cam section of the main shaft disengaging cam
(3) Top end section of the main shaft disengaging stopper

™ Relation of the position of the main shaft disengaging cam and the main shaft disengaging

link

1) Provide a clearance of 1.6 mm between the main shaft hand wheel and the main shaft
disengaging cam using a spacer or the like.

2) Loosen adjustment screw 1 (1 pc.) and setscrews 2 (3 pcs.) in the needle throwing STM
installing plate and move needle throwing STM installing plate 3 to the left or right to adjust
the dimension of main shaft disengaging cam 4 and main shaft disengaging link 5 to 2 mm.
Then tighten setscrews 2 (3 pcs.) in the needle throwing STM installing plate.

(Note) When this adjustment is performed, the needle entry point shifts. Perform again

the needle entry adjustment.

3) After this adjustment, perform (21) Main shaft disengaging stopper adjustment

(20) Disengaging the main shaft

(21) Main shaft disengaging stopper

Stopper

Cam

Main shaft

disengaging cam

1.6 mm

2 mm

How to adjust

Disassembly

Location of components to be adjusted

Adjustment drawing

How to adjust

A to E on page 15

Stopper

4

3

Contact

point of the

stop side

To make top end of the stopper
come in contact with the stopper
spring

Main shaft
hand wheel

1

2

3

4

5

2

2

28

Put the motor timing belt on the motor shaft pulley of the
sewing machine motor (asm.). Then adjust the belt
tension by moving the motor up or down and after the
adjustment, fix the belt with screws 1.

(22) Motor belt

How to adjust

Disassembly

Location of components to be adjusted

Adjustment drawing

A to F on pages 15 and 16

Check the needle thread using a #14 needle.

- Confirmation -

1) Clearance provided between the top end of the needle eyelet
and the hook is 0 to 0.05 mm.
Loosen screw 1 using a 2 mm hexagon wrench key, and
change the position at which needle threading lever stops.

2) The hook should protrude 1 to 1.5 mm from the front face of
the #14 needle.

3) When using a #11 needle, the needle threading guide (left)
should come in contact with the side face of the needle when
the needle threading lever is pressed down to the lowest
position of its stroke to make the needle threading hook rotate.
If the needle threader is installed to be excessively deflected
when using a #11 needle, it will deflect more when using a #16
needle. This prevents the hook from automatically returning to
its home position at the time of needle threading.
* Thehook can enter the needle eyelet as long as a needle of

which count is #11 through #16.

4) The needle threading lever should slide smoothly without being
pushed against the related components. Also, it should not
come in contact with the needle clamp, etc. when it returns to
its home position.

(23) Needle threader

How to adjust

Disassembly

Location of components to be adjusted

Adjustment drawing

1 to 1.5 mm

2 mm hexagon
wrench key

0.98 N (100g)

3 to 4 mm

0 to 0.05 mm

1

1

29

1) Loosen screw 2 and adjust with 1 so that the installing plane of the
transfer body is level when the clearance provided between the lower
face of the upper section of driving shaft installing plate !0 and the
upper face 9 of the external working body is 2 mm.

<When the adjustment cannot be performed>

When the adjustment cannot be performed within the range of
adjustment with 1, check the position of 3.

• The normal position of 3 is, when the aforementioned upper position

(2 mm) is obtained, the place where the 凹 (concave) mark is almost
in the level position.

[To correct the position of 3]

1. Turn the groove on the upper
section of driving shaft using a
screwdriver and lower external
working body 9 by approximately
12 mm.

2. Loosen screw 4 and remove
transfer body (asm.) 5.

3. Return external working body 9
to the upper position (2 mm) and
install 3 to the normal position.

4. Lower again external working
body 9 by approximately 12
mm, set 5 and tighten screw
4at the position of 30˚ in the
direction of deflecting the spring.

(24) Automatic needle threading mechanism

(24)-1 Adjusting the upper position of the transfer body

How to adjust Disassembly

Location of components to be adjusted

Adjustment drawing

3) Adjusting the thread retaining pressure at the upper position
Loosen screw 2 and turn 1 to adjust the thread retaining
pressure at the upper position (origin) as shown in the figure.

2) Adjusting the origin detection circuit board

• Loosen screw 6 and

move 8 up or down
to adjust so that the
aforementioned
upper position is
obtained at the origin
detection.

• Turn ON and OFF

the power to the
machine several
times to confirm.

* In addition, 8 and 7

should be pressed as
shown in the figure.

Up

Down

To be pressed

Spring

30˚

Groove

State which is not
open.
(Immediately before
opening)

Mettler No.100

Mettler No.100 should be set with a 0.05 to

0.15 N (5 to 15 g) load.

0.05 to 0.15 N

State which comes in
contact with each other

1

2

4

5

6

7

8

Level

1

2

6

7

Concave

mark

3

8

9

!0

Transfer
body
(asm.)

30

Set the main shaft to 40˚ (marker dot on the hand wheel comes right
above). Or, turn the groove on the upper section of the driving shaft
with a screwdriver to set the transfer body to the lower position.

1) Checking the change-over of the retaining pressure change-over
camConfirm that the retaining pressure change-ovrer roller has
moved from cam A of the transfer body cam to cam B when the
transfer body is in the lower position.

<When the rooler has not moved>
[Adjusting the change-over timing of
the retaining pressure change-over
cam]
Loosen screw 2 and move 1 up or
down to adjust the timing in the case
where the retaining pressure
change-over roller has not moved
from cam A to cam B when the
transfer body is in the lower position.
(At this time, be careful of the
backlash.)
* When performing this adjustment,

re-adjust 1), 2) and 3) of the upper
position adjustment of (24) - 1.

2) Longitudinal adjustment of the lower position

Loosen screw 3 and adjust the longitudinal position of 4 so that
the installing plane of the transfer body is level at the lower position
as shown in the figure.
At this time, the distance from the top end of the transfer body to
the front of the presser holder has to be 4 to 5 mm.

(24) - 2 Adjusting the lower position of the transfer body

3) Vertical adjustment of the lower position
When a thread is set to the transfer body and the transfer body is
placed in the lower position, loosen screw 2 and adjust the vertical
position so that the thread stretched tight in front of the needle is
in the center of the needle eyelet.

4) Adjusting the retaining pressure change-over link
Loosen screw 3 and move 4 up or down to adjust so that the
clearance provided between the thread presser plate and the top
end of the transfer body is 0.5 to 1 mm when the change-over
roller rides on release cam (C) on the way of returning motion of
the transfer body.

* When performing this adjustment, perform (24) -1 -3) Adjusting

the thread retainig pressure at the upper position.

How to adjust Adjustment drawing

C

Cam A

Cam B

Roller

0.5 to 1 mm

1

2

2

Thread

1

2

3

4

Level

4 to 5 mm

3

4

Transfer
body

31

Loosen screw 1 and move 2 up or down so that the clearance provided between the needle clamp thread guide and the top end of needle
clamp threading arm is 0.6 to 1 mm when pushing up the spring rack section of threading working body and turning the needle clamp threading
arm.

(24) - 3 Adjusting the height of the needle clamp threading arm

Loosen screw 1 and adjust so that the distance from the top end of transfer body to the needle is 4.5 to 5 mm at the lower positon of the
transfer body.

(24) -4 Lateral adjustment of the the transfer body

0.6 to 1
mm

How to adjust

Adjustment drawing

How to adjust Adjustment drawing

4.5 to 5

Needle

1

2

1

Loosen screw 1 and adjust the lateral position of thread path control plate 2 so that a thread is induced into the fork end at the top end of the
needle calmp threading arm when a thread is set to the transfer body and the transfer body is placed in the lower position.
(Required value is 2.5 )

(24) - 5 Adjusting the thread path control plate

How to adjust

Adjustment drawing

0

-0.2

1

2

0

-0.2

2.5

32

Loosen 2 and adjust the longitudinal position of face plate 1 so that the clearance provided between the threading body and the face
plate is 1 to 2 mm when threading body 3 rotates and comes down to the position of the thread take-up spring guide section of the face
plate.

(24) - 6 Adjusting the position of the face plate

How to adjust Adjustment drawing

1

3

2

1 to 2 mm

33

(25) Automatic bobbin winding

(25) - 1 Adjusting the height of thread retaining plate A

How to adjust Disassembly

Location of components to be adjusted

Adjustment drawing

• Adjust thread retaining plate A following the procedure of (25) - 2
Adjusting the inclination and the longitudinal position of thread
retaining plate A, temporarily determine the height and fix it.

• Turn the bobbin thread intermediate gear by hand to move thread
retaining plate A in the state that the throat plate and the hook cover
are attached. Then temporarily determine the height of thread
retaining plate A so that it can move from the forward end position
(above the inner hook) to the backward end position.

™ Insert a hexagon wrench key from the frame hole and loosen the

thread retaining plate C setscrew to adjust the height.

* Adjust the height so that the clearance provided between the upper

plane (rib which is higher) of the bobbin rib and the bottom end of
thread retaining plate A is 0 to 0.2 mm at the forward end position.

Thread retaining plate A

Thread retaining plate
C setscrew

Bobbin thread
intermediate gear

[Checking the working of thread retaining plate A]
After the adjustment, turn the bobbin thread intermediate gear by
hand to check the working of the plate A. Confirm that bobbin winder
driving plate is stretched by the twist of thread retaining plate A with
hook cover, throat plate, inner hook, etc. and thread retaining plate
A does not stop temporarily in the working range of thread retaining
plate A.

Free arm bottom cover and front panel

Hexagon wrench
key (2.5 mm)

Upper plane of bobbin rib

Forward end position of
thread retaining plate A

0 to 0.2 mm

34

[Adjusting the inclination]
Loosen the thread retaining plate A setscrew and adjust so that the
clearance provided between “U” letter section at the top end of thread
retaining plate A and the bobbin thread mechanism base is 7±0.2
mm.

(25) - 2 Adjusting the inclination and the longitudinal position of thread retaining plate A

How to adjust Disassembly

Location of components to be adjusted

[Adjusting the longitudinal position]
Adjust so that the narrowest clearance clearance provided between
the outer hook fixed knife installing base and the top end of thread
retaining plate A is 0.1 to 0.3 mm when making thread retaining plate
A work by hand (rotate Q in the figure).

* Loosen the thread retaining plate setscrew and simultaneously

adjust the inclination and longitudinal position.

Note) After the adjustment, confirm the working of thread

retaining plate A.

Thread retaining
plate A

Thread retaining
plate A setscrew
(2.5 mm)

Bobbin thread mechanism base

7 ± 0.2 mm

Thread retaining plate A

0.1 to 0.3 mm

Q

Outer hook fixed knife
installing base

Throat plate

35

(25) - 3 Adjusting the position of the needle thread catching plate

Loosen the needle thread catching plate setscrew and slide the needle thread catching
plate to and fro to adjust so that the clearance is 0.3 to 1 mm at the position where the
clearance provided between thread retaining plate A and the convex section of the needle
thread catching plate is minimized when making thread retaining plate A work by hand
(rotate Q in the figure).

(25) - 4 Adjusting the position of the inner hook and the thread retaining plate

Needle thread catching plate

Position where clearance
is minimized

0.3 to 1 mm

How to adjust

Adjustment drawing

Thread retaining plate A

Needle thread
catching plate
setscrew

Q

Needle thread

catching plate

• Make thread retaining plate A travel to the forward end position by

hand.

• In this state, turn the inner hook in the normal direction of rotation,

make it come in contact with the inner hook detent plate, loosen the
inner hook detenet plate setscrew and move the inner hook detent
plate to the right or left to adjust so that the clearance provided
between the inner hook and thread retaining plate A is 0 to 0.5 mm.

* At this time, the adjustment of (5) Inner hook detent (longitudinal

direction) should be satisfied.

How to adjust Adjustment drawing

Inner hook detent
plate setscrew

Inner hook detent
plate setscrew

Inner hook

detent plate

0 to 0.5 mm

36

(Caution) Be sure to turn OFF the power to the sewing machine up to steps 1 through 2.

1) Draw out the connectors of CN18 and CN32 mounted on the microcomputer circuit board.

2) Insert 5-pin connector of jig into CN18.
In addition, connect the connector drawn out from CN32 to 3-pin connector of jig.

3) Take out the bobbin.

(26) Easy adjustment procedure of bobbin thread detection (Perform this adjustment when replacing the microcomputer circuit board.)

1) Turn the hand wheel and turn ON the power to the sewing machine at 170˚ to 190˚. Connect the “–” side of the tester to the setscrew (GND)
located at the bottom on the right side of the microcomputer circuit board and connect the “+” side to 3-pin of CN-31 mounted on the
microcomputer circuit board. Then search the angle at which the voltage becomes highest.

2) Fix the hand wheel at the angle which has been searched and adjust VR1 so that the scale of the tester is 3.8V to 4.2V.

3) Return the hand wheel to its home position to complete the procedure.

(26) -1 Adjusting VR1 (variable resistor 1) (adjusting the bobbin thresad remaining amount detection sensor)

How to adjust Adjustment drawing

How to adjust Adjustment drawing

1) Turn the hand wheel and turn ON the power to the sewing machine at 170˚ to 190˚. Connect the “–” side of the tester to the setscrew (GND)
located at the bottom on the right side of the microcomputer circuit board and connect the “+” side to 1-pin of CN31 mounted on the
microcomputer circuit board. Then search the angle at which the voltage becomes highest.

2) Fix the hand wheel at the angle which has been searched and adjust VR2 so that the scale of the tester is 3.8V to 4.2V.

3) Return the hand wheel to its home position to complete the procedure.

(26) -2 Adjusting VR2 (variable resistor 2) (adjusting the limit sensor)

How to adjust

CN18

CN32

Microcomputer

circuit board

5-pin side

Connector

of jig

3-pin side

CN31

Setscrew

Tester

VR1 VR2

37

How to adjust

Location of components to be adjusted

Adjustment drawing

Loosen two screws and determine the position of the DF sensor circuit board (asm.) so that DF (drop feed) switch is turned ON with the DF link
when the DF knob moves to the right [feed dog DOWN].
At this time, tighten the screws after confirming that the clearance of section A is 1 mm.

* DF switch should not be turned ON when the DF knob is on the left (feed dog UP).

(27) Adjusting the DF detecting switch

1 mm

A

Screw

[Hook driving shaft support A (asm.)]

Loosen setscrew 1 in the hook driving
shaft support A installing plate from
the bottom surface of the bobbin thread
mechanism base, and make hook driving
shaft support A (asm.) 2 slightly come in
contact with hook driving shaft 3 to fix.

(28) Adjusting the hook driving shaft support A (asm.)

How to adjust

Hook driving shaft support B (asm.)

1

2

3

Silicon sealant

0.05 to 0.1

Make 2 slightly come in contact with
hook driving shaft to fix.

[Hook driving shaft support B (asm.)]

Adjust with nut A 4 and nut B 5 so that the
clearance provided between the bottom surface
of the bobbin thread mechanism base and lock
nut A 4 in the hook driving shaft support B
installing plate is 0.05 to 0.1 mm.
After the adjustment, fix two places with the silicon
sealant.

4

5

38

Press main shaft support 1 in the direction of P as shown in the illustration and fix it.
At this time, press main shaft 2 to such an extent that it bends upward by 0.05 mm.

(29) Adjusting the main shaft support

How to adjust Adjustment drawing

Fix driving gear cover 1 at the position where the groove for screwdriver
comes to the center of the opening portion of driving gear cover 1.

(30) Adjusting the position of the driving gear cover

How to adjust Adjustment drawing

Opening portion

1

2

1

39

Measure the voltage between ground and CN16-3 pin.

(31) Adjusting the needle thread breakage detection circuit board

Shielding plate OPEN → 4.5 to 5.2 V
Shielding plate CLOSE → 0 to 0.5 V
Loosen 1 and adjust 2 so that CLOSE is set when the jig of 0.2 mm is put between the thread breakage
shielding plate and the thread take-up spring cushion, and OPEN is set when the jig of 0.4 mm is put between
them.
After the completion of adjustment, apply the screw lock to 1 and 2.

(31) -2 Relation between shielding and sensor output

How to adjust Adjustment drawing

How to adjust

Adjustment drawing

CN16-3 (+)

Tester

CLOSE

0.2 0.4

(31) -1 Measurement of sensor output

Ground

1

2

OPEN

40

2. Embroidering device

1 Replacing procedure of the motor (STM)

1 Remove the side cover. (See page 17 F. Two screws)
2 Remove the top cover. (See page 17 F. Five screws)

(Trigger limiting plate and trigger pin will come off. So,
be careful.)

3 Remove the frame holder cover.
4 Remove the main frame. (Remove 4 pcs. each of the

main frame setscrew in Fig.-1 and Fig.-2.
Loosen the motor bracket setscrew B which is
connected to the earth and remove the earth wire.)

5 Bend the cord presser and remove the lead wire.

(Remove the respetive fixing tapes.)

6 Remove the motor bracket (asm.) from the main frame

(asm.).

7 Remove the motor (asm.). (Two screws)
8 Replace the motor with a new one. (Backlash in the

gear : 0 to 0.02 mm)

9 When the belt is removed (Y-STM), confirm that the

belt is adjusted properly referring to Adjusting the
belt” described on the next page.

!0 The X-Y drive components should not come in contact

with the main frame when detecting origin. If they come
in contact with the main frame, it is necessary to adjust
the position of the origin.

2

Fig.-2

Main frame setscrew

Fig.-1

Cord presser

X drive plate (asm.)

Y detecting

switch (asm.)

Main frame setscrew B

Main frame
setscrew C

Embroidering device Y-STM (asm.)

Embroidering
device X-STM

(asm.)

Y drive plate

X pulley (asm.)

Y pulley (asm.)

Y drive felt A

Frame detecting
switch circuit board
(asm.)

Frame holder (asm.)

41

2 Adjusting the belt

When the STM or the like has been replaced, it is necessary to adjust the belt tension. Perform the adjustment as shown in the figure below.

1 Remove the belt holder. (One screw)
2 For the proper belt tension, adjust the respective pulleys (asm.) so as to obtain the deflection described in the table below when a load of 0.98 N (100 g) is applied to the

midway of the belt, and tighten screws (two screws).

3 Adjusting the origin

[X origin]
Insert a gauge of 1 mm between the X drive felt B and the X drive shaft holder
presser, and adjust so that the X detecting switch (asm.) is turned ON when the X
drive plate (asm.) is shifted in the direction of the origin.

Clearance gauge of 1mm

X drive shaft

felt B

X detecting switch (asm.)

X drive drive shaft

holder presser

X drive plate (asm.)

Main frame (asm.)

A m/m

0.98 N
(100g)

Belt

Pulley (asm.)

Y belt

presser

Clearance gauge
of 1 mm

• If the belt is excessively tensed, the STM will step out.

• If the belt is insufficiently tensed, the belt will move lightly but skipping will occur.

• Before starting to adjust the belt, check the frame holder (asm.) and Y drive shaft, and X drive plate(asm.)
and X drive shaft. (Standard :The drive shafts need no lubrication. They automatically drop (slide)
when they are inclined by 45fl.)

Y detecting switch (asm.)

[Y origin]
Insert a gauge of 1 mm between the frame holder (asm.) and the Y drive shaft felt A,
and adjust so that the Y detecting switch is turned ON when the frame holder (asm.)
is shifted in the direction of the origin.

Components to be adjusted
X pulley (asm.)
Y pulley (asm.)
Y intermediate pulley (asm.)

X drive belt
Y drive belt
Y drive belt

A (deflection) mm

3.5 to 4.5

3.5 to 4.5

2.5 to 3.5

42

5 Connection block diagram

Embroidering device

Connector

2

24

4

42

1 Emboidering frame
2 X detecting SW
3 Y detecting SW
4 X direction STM
5 Y direction STM
6 Frame SW 1
7 Frame SW 2
8 Frame SW 3
9 Mode change-over SW

!0 Embroidering release SW

CN75

1

23

4

5

6

7

8

9

!0

2) Adjustment of the embroidering device removing/installing detection switch

• Adjustment of the embroidering device removing/installing detection switch
Insert a spacer of 1.7 mm to section A, and fully press the connecting slider in the
direction of the sewing machine main body side to turn ON the detection switch.
Securely tighten the setscrews in the detection switch plate at the position.

• Remove the spacer of 1.7 mm, fully move the connecting slider to the sewing machine
main body side, and make sure that the detection switch plate comes in contact with
the lever switch link and the lever switch link lightly moves with the spring pressure.

• Slowly return the connecting slider, and make sure that the reference line (the dotted
line) does not pass point B before the switch is turned OFF.

• Insert the spacer of 1.7 mm to section A again, slowly move change-over lever 1 to
the right-hand
side, and make
sure again that
the switch is
turned ON when
change-over
lever 1 is fully
moved to the
right-hand side.

4 Adjusting the respective switches

1) Adjusting the mode change-over switch

Adjust the position of the
mode change-over switch so
that the clearance provided
between the actuator of the
mode change-over switch
and the main body of the
switch is “0” when the mode
change-over contact is flush
with the reverse of the
bottom cover.

Clearance

should be “0”.

Actuator

Flush

Reverse of

bottom cover

Mode change-over switch (asm.)

Mode change-over contact

A click sounds when the switch is turned OFF.

1.7 mm

A

B

Reference

line

1

43

Description
Straight line is sewn by 50 stitches with feed 2.3 mm and actual feed is adjusted to internal signal. This setting
is related to thread tension.
For confirmation of sewing Tortoise shell pattern can be sewn continuously.
For confirmation of sewing Eyelet buttonhole can be sewn.
For confirmation of sewing Zig zag pattern can be sewn.
Longitudinal feed amount and lateral feed amount are adjusted.
Both adjustments can be simultaneously performed with one pattern.

Same as E

For confirmation of sewing Faggoting can be sewn. (it works even without thread)
Straight line can be sewn with feed 2.3 mm without thread.
Straight line can be sewn with feed “0” without thread.

Mechanical adjustment of longitudinal feed can be performed.

One point pattern (apple) is sewn.
When timing is adjusted, needle position moves to the left.
When timing is adjusted, needle position moves to the right.
When timing is adjusted, needle position moves to disengagement position.
When timing is adjusted, feed moves to “0”.
Thread trimming motion can be confirmed by rotating hand wheel by hand.

Adjusting position of touch panel and LCD screen
Material thickness reading can be adjusted. This setting is related to thread tension.
Sensor at memory card inserting hole can be confirmed.
Bobbin thread remaining amount detecting sensor and bobbin thread limit sensor can be confirmed.
Data in pattern case can be erased.

Item

Actual feed compensation

Tortoise shell pattern
Eyelet buttonhole
Z/Z
Adjusting pattern (star) of longitudinal
feed and lateral feed
Adjusting pattern

Not used.
Needle throwing pattern
Straight idle stitching
Idle stitching with feed “0”
Not used.
Not used.
Longitudinal feed adjusting pattern
(Darning stitching)
One point
Needle position (left)
Needle position (right)
Needle position (disengagement)
Feed “0” (STM)
Confirmation of thread trimming
Not used.
Not used.
Panel switch positioning
Adjusting material thickness
Confirmation of card switch
Bobbin thread sensor
Initialization of data in pattern case

Symbol on service mode setting screen

A

B
C
D
E

F

G

H

I

J
K
L

M

N

O

P

Q

R
S
T
U
V

W

X
Y
Z

3. Service mode

There is “service mode” (check item) on the LCD display of E9010. Confirmation and adjustment can be performed.

(1) Item and description of the service mode

44

(2) How to make the adjustment screen appear and how to complete the procedure

(2) -1 Positioning the panel switch

1. From the state that the power to the machine is turned OFF, pressing start/stop switch, reverse
stitching switch and thread trimming switch, turn ON the power switch.

2. Panel switch positioning screen is displayed.

3. Press the red point located at the bottom of the left side, and the point changes to the bottom of the
right side. Every time the red point is pressed, the red point changes from the top of the left side to
the top of the right side in order.

4. The service mode screen is displayed at the time when the point at the top of the right side is
pressed.

5. Press “Save” key and “Pictograph .....” is displayed.

Never turn OFF the power to the machine while this message is being displayed. (Setting will be
broken.)

6. When the message of “Pictograph” is displayed, turn OFF the power to complete the procedure.

7. Perform turning the power ON/OFF again under the main body mode. (In the state that the
embroidering device is removed)

(2) - 2 Service mode

1. From the state that the power to the machine is turned OFF, pressing reverse stitching switch and
thread trimming switch, turn ON the power switch.

2. Service mode screen is displsayed and press the corresponding switch.

3. Completing procedure is the same as that of the aforementioned positioning panel switch.
When “Save” key is pressed at the service mode setting screen, the data is stored in memory and
not stored in memory with “End” key.

<Service mode screen>

45

Symbol

A

B
C
D
E

F

H

I

J

M

N

(3) How to set and confirm under the respective service mode

Item

Actual feed compensation

Tortoise shell pattern
Eyelet buttonhole
Z/Z
Adjusting pattern (star) of
longitudinal feed and lateral feed

Adjusting pattern (box) of
longitudial feed and lateral feed
Needle throwing pattern
Straight idle stitching
Idle stitching with feed “0”
Adjusting pattern of londitudinal
feed (Darning stitching)
One point (apple)

Procedure

1. Sewing conditions

• Speed : VR : max. high speed

• Material : 2-ply of ELNA designated cloth

• Thread : Mettler No100 for both needle and bobbin threads

• Presser foot : Zigzag hinging presser foot

2. When start key is pressed, the machie sews 50 stitches with feed amount of 2.4 mm and automatically
stops.
(After completing sewing, it is better to perform automatic thread trimming.)
(Pattern is not displayed.)

3. Measure the length of 50 stitches, and select the number corresponding to the length.

4. The screen returns to the service mode setting screen with the return key.

5. Press save key if the procedure completes with this setting.

When start key is pressed, confirmation of sewing can be performed.
When start key is pressed, confirmation of sewing can be performed.
When start key is pressed, confirmation of sewing can be performed.

1. Sewing conditions

• Speed : VR : max. high speed

• Material : ELNA designated cloth with interlining

• Thread : Mettler No100 for both needle and bobbin threads

• Presser foot : Teflon presser foot

2. When start key is pressed, the machine sews one star pattern and stops. Perform adjustment of
longitudinal feed and lateral feed observing the deformation of pattern.

3. Adjust the deformation of pattern until separation of 0.5 mm and overlapping of 0.5 mm are obtained in
the longitudinal direction, and separation of 0.45 mm and overlapping of 0.4 mm are obtained in the
lateral direction.

4. The screen returns to the service mode setting screen with the return key.

5. Press save key if the procedure completes with this setting.

Same as E

Pattern of 7 mm needle throwing This setting is used to confirm adjudtment and sewing.
This setting can rotate the machine without thread and is used to check noise or the like.
This setting can rotate the machine without thread and is used to check noise or the like.
Pattern to mechanically adjust longitudinal feed This setting is used to confirm adjustment.

When start key is pressed, confirmation of one point pattern sewing can be performed.

Caution

46

Item

Needle position (left)

Needle position (right)

Needle position (disengagement)

Feed “0” (STM)

Confirmation of thread trimming

Panel switch positioning
Adjusting material thickness

Procedure

1. Press “O” key and “Turn hand wheel until “peep” sounds” is displayed.

2. When hand wheel is turned by hand and exceeds 287˚, “peep” sounds and needle shifts to the left stitch
base line.

1. Press “P” key and “Turn hand wheel until “peep” sounds” is displayed.

2. When hand wheel is turned by hand and exceeds 287˚, “peep” sounds and needle shifts to the right
stitch base line.

1. Press “R” key and “Turn hand wheel until “peep” sounds” is displayed.

2. When hand wheel is turned by hand and exceeds 287˚, “peep” sounds and needle shifts to the main
shaft disengagement position.

1. Press “R” and immediately the feed STM shifts to the position of feed “0” if timing (110˚ to 287˚) is within
the range of STM drive possibility.

2. If timing (287˚ to 110˚) is outside of STM drive possibility, “peep...” is displayed, and when hand wheel
is turned by hand and exceeds 110˚, “peep” sounds and the feed STM shifts to the position of feed “0”.

Press “S” at the lowest dead point and thread trimming roller enters thread trimming cam. Then moving
knife works by hand.
(If “S” is pressed below the lowest dead point, thread trimming roller comes in contact with thread trimming
cam and the lateral feed STM will step out. So, be careful.)
The procedure is described in (2)-1, page 41.

1. Set a zigzag hinging presser foot.

2. Lower completely feed dog below throat plate.
(Needle bar in the lowest point)

3. Lower presser foot and press “Setting end” key.

4. The screen returns to the service mode setting screen with the return key.

5. Press save key if the procedure completes with this setting.
Press “Setting end” to set this procedure.

CautionSymbol

O

P

Q

R

S

V

W

Value which is
set from now

Existing set
value

47

Item

Confirmation of card switch

Bobbin thread sensor

Initializing switch

Procedure

1. Press “X” and the display as shown in the figure on the right will appear.

2. Card with/without check
“0” is displayed if card is inserted and “1” is displayed if it is not inserted.

3. Card lid check
“0” is displayed if card lid is closed and “1” is displayed if it is open.

1. Press “Y” and the display as shown in the figure on the right will appear.

2. Press “Start” and the sewing machine rotates.
Press “

” to stop the sewing machine.

(Bobbin thread sensor does not work unless the sewing machine rotates.)

3. Limit sensor check
“0” is displayed when limit sensor is in ON state. “1” is displsyed when the sensor is in OFF (shield)
state.

4. Remaining amount sensor check
“1” is displayed when remaining amount sensor is in ON state. “0” is displayed when the sensor is in
OFF (shield) state.

1. Press “Z” and the data in the embroidery pattern case will disappear.

2. When initializing switch (Z) is operated, press “ ” and turn OFF the power switch.

Caution

Symbol

X

Y

Z

With/without card
With : 0
Without : 1

Card lid
Closed : 0
Open : 1

Limit sensor
ON : 0
OFF : 1

Remaining amount
sensor
OFF : 0
ON : 1

48

Test mode

Remove front panel and easy test can be performed by the operations below in the state that connector of switch jig for test is connected toCN1 mounted on the
microcomputer circuit board.

1. From the state that the power to the machine is turned OFF, shortcircuit the 1-2 pins of CN13 connector of the microcomputer circuit board and turn ON the power to the
machine.
Turn ON the switches below to perform the respective operations.

1 SW-A : Aging (Needle throwing pattern and disengaging pattern repeat.)
2 SW-B : Needle shifts to left position.
3 SW-C : Needle shifts to main shaft disengagement position.
4 SW-D : Right needle entry

2. From the state that the power to the machine is turned OFF, shortcircuit the 3-4 pins of CN13 connector of the microcomputer
circuit board and turn ON the power to the machine. Turn ON the switches below to perform the respective operations.

1 SW-A :Working of threading working body can be confirmed.
2 SW-B :Working of bobbin thread winding STM can be confirmed.
3 SW-C :Lateral feed STM shifts to the left position.

Feed STM shifts to the feed “0” position.

4 SW-D :Position of thread release 2

3. Tests below can confirm the functions on the microcomputer circuit board.
Turn OFF the power to the machine and from the state that 1-2 pins and 3-4 pins of CN13 mounted on the microcomputer circuit board are shortcircuited, turn ON the
power to the machine while the switches below are turned ON. Then tests below can be executed.

1 Turn ON the power while SW-A is ON.............................. Test of SDRAM

2 Turn ON the power while SW-B is ON.............................. Test of LCDRAM

3 Turn ON the power while SW-C is ON. ............................ Test of mask ROM

4 Turn ON the power while SW-D is ON. ............................ Test of flash memory

5 Turn ON the power while thread winding SW is ON......... Test of smart media

6 Turn ON while presser lifting SW is ON............................ Test of serial communication

Two kinds of tests below can be performed for the test of serial communication.

1 Connect 9-pin connector of jig to CN23 mounted on the microcomputer circuit board to perform the test. (Test of circuit board)
2 Connect serial communication relay wire to CN23 mounted on the mocrocomputer circuit board and connect D sub-connector of jig to sub-connector to perform the

the test. (Test of circuit board and relay wire)

The result of test is displayed by the color of emitting light of LED.

Testing Orange
OK Green
NG Red

Switch jig for test

SW–C

SW–D

SW–B

SW–A

CN1

49

[6] Circuit board connection diagram

[Microcomputer circuit board]

CN1

CN2

CN6

CN7

CN8

CN9

CN3

CN4
CN5

CN11

CN12

CN13

CN14

CN21

CN29CN35

CN30

CN31

CN32

CN33

CN34

CN26 CN25

CN24

CN20

CN19

CN18

CN16

CN23

Table of microcomputer circuit board connector

Connector No.

CN-1

CN-2
CN-3
CN-4
CN-5
CN-6
CN-7
CN-8

CN-9
CN-11
CN-12
CN-13
CN-14
CN-16
CN-18

CN-19

Connection
S/S, thread trim, reverse feed, with/without exclusive bobbin thread,
etc.
Potentiometer
Buttonholing SW
Motor pulse
Presser lifting SW
Disengagement detecting circuit board
Needle throw STM
Threading STM relay lead wire, transfer body detecting circuit board
With/without needle thread detecting circuit board
Thread wind SW
Motor thermistor
Terminal used at the time of production
Display circuit board relay lead wire
Needle thread breakage detecting circuit board
Bobbin thread origin sensor circuit board, thread retaining plate cover
sensor circuit board
Bobbin thread supply STM

Check
9PIN 3.3V ; 12PIN 5V ; 3.11PIN GND ;
14PIN 270Ω
1PIN 3.3V ; 3PIN GND
2PIN GND
1PIN 5V ; 3PIN GND

1PIN 5V ; 3PIN GND
1-2PIN, 3-4PIN 4.2Ω
1-2PIN, 3-4PIN 10Ω ; 5PIN 5V ; 7PIN GND
1-2PIN, 3-4PIN 4.2Ω

1PIN-GND
For assembling
2PIN 20 to 24V ; 7PIN GND ; 6PIN 5V
1PIN 5V ; 2PIN-GND 270Ω
1,5PIN GND ; 3PIN 5V

1-3PIN, 2-4PIN 20Ω

Connector No.

CN-20
CN-21
CN-22
CN-23
CN-24
CN-25
CN-26
CN-27
CN-28
CN-29

CN-30
CN-31
CN-32
CN-33
CN-34
CN-35
CN-36

Connection
Feed STM relay lead wire
Embroidery card connector
ROM adaptor
Serial communication connector
Touch panel connecting wire
Driver binding wire A
Driver binding wire B
ROM adaptor
ROM adaptor
Controller socket, card lid SW circuit board, light and shade VR circuit
board
Power circuit board connecting wire
Remaining amount sensor circuit board (receiving light)
Remaining amount sensor circuit board (emitting light)
Lateral feed STM relay lead wire
Main shaft detecting circuit board
Power supply connecting wire
DF sensor circuit boad

Check
1-2PIN, 3-4PIN 4.2Ω
1, 10, 11, 18, 23PIN GND
25PIN 3.3V ; 15, 34PIN GND

1PIN GND
7, 9PIN GND

5PIN 5V ; 1, 3, 7PIN GND

1-3PIN 16.8V
2PIN 5V
2PIN GND
1-2PIN, 3-4PIN 10.5Ω
2PIN 5V ; 5PIN-GND
2-1PIN 5V ; 4-3PIN 30V ; 6-5PIN 34V

Replacing the microcomputer circuit board

CN36

• Be to turn the power OFF when inserting /
drawing out the connector of [CN14].

• Securely insert the connector until it will
go no further when inserting it.
LCD will be caused to break.

50

[Mocrocomputer circuit

board block diagram]

1

CN1

CN29

CN16

CN5
CN2

CN11
CN13

CN31
CN32
CN34

CN20

CN24 CN14 CN22 CN27 CN28

CN35

CN30
CN4

CN12

CN21
CN25
CN26

CN33

CN8 CN18

CN19 CN9CN6

CN7

13

7

3

2
3

2
3
4
3
3

6

CN101

CN102

7

3

2

3

2

3

3

7

544

415 4855

6

5
3

2

26
10
10

2

CN76

CN77

CN79

2

44

4

2

2

4

2

2

2

4

CN78

4

4

CN73

22

CN74

CN72

CN75

CN71

1

2

CN51

1

2

AC120V

or

AC230V

CN50

TE2
TE1

1

CN63CN62

CN65

CN67

CN66

CN64

CN61

AC13.5V 2

6

2

5

2

4

2

AC28V,AC24V,
AC12V

+24V,+28V
+5V

CN3

CN23

9

1 SW circuit board

Start/stop SW
Reverse SW
Thread trimming SW

2 With/without bobbin thread sensor circuit board
3 Slide VR
4 Controller socket
5 Card lid SW circuit board
6 Light/shade VR circuit board
7 Needle thread breakage detecting circuit board
8 Presser lifting SW
9 Potentiometer

!0 Thread winding SW
!1 Buttonholing stop SW Buttonholing start SW
!2 Used at the time of production
!3 Remaining amount sensor circuit board

(emitting light)
Bobbin thread remaining amount sensor
Limit sensor

1

2

3

4

5

6

7

8

9

!0

!1

!2

!3

!4

!5

!6

!7

!8

!9

@0

@1

@2

@3

@4

@5

@6

@7

@8

@9

#0

#1

#3

#4

#5

#6

#8

#9

$0

$1

$2

$3

$4

$5

$68

$7

$8

$9

!4 Remaining amount sensor circuit board

(receiving light)
Bobbin thread remaining amount sensor
Limit sensor

!5 Feed STM
!6 Needle throw STM
!7 Disengagement detecting circuit board
!8 Main shaft detecting circuit board

Up/down stop
Needle throw, feed timing
Needle threading timing
Bobbin thread winding timing
Lateral feed timing

!9 Display circuit board

LCD 320 x 240 dots

@0 Touch panel
@1 Lateral feed STM
@2 Threading STM
@3 Transfer body detecting circuit board

@4 CFL (backlighting)

Cold cathode valve

@5 ROM adaptor circuit board
@6 Bobbin thread supply STM
@7 Drawing STM
@8 Bobbin thread origin sensor circuit board
@9 Thread retaining plate cover sensor circuit board
#0 Inverter circuit board

Power for backlighting (CFL)

#1 Memory card
#2 DF sensor circuit boad
#3 Serial communication connector
#4 Power circuit board
#5 Sewing machine lamp
#6 Power SW
#7 Filter circuit board
#8 Power transformer (asm.)
#9 Motor pulse detecting circuit board
$0 Main motor

Microcomputer circuit board

$1 Thermistor
$2 Embridering device detecting SW
$3 Y origin detecting SW
$4 X origin detecting SW
$5 Frame SW 1 Frame SW 2 Frame SW 3
$6 Embroidering device
$7 Embroidery Y STM
$8 Embroidery X STM
$9 Eject lever detecting SW

CN36

2

#5

#2

#7

51

[Power circuit board]

Replacing the power circuit board

Be sure to remove the power plug before starting to
replace the power circuit board.
A) Remove three setscrews in the power circuit board

(asm.).

B) Gradually pull backward the power circuit board

and draw out the connector of the power circuit
board.

Power circuit board

[Inverter circuit board]

CN67

CN66

CN64

CN62

CN65

CN61

CN63

F2
F3
F4

CN102

CN101

To the power
circuit board

To the
back light

Replacing procedure of the fuse

C) Remove the belt cover.
D) Remove two setscrews of the power box (asm.).
E) Draw out the power box (asm.)
F) Replace the blown fuse with a new one.

F4, F3 : 3.15A fuse
F2 : 5A fuse

Connector No.

CN-61
CN-62
CN-63
CN-64
CN-65
CN-66
CN-67

Connection
Lamp (asm.)
Main motor
Transformer
Inverter binding wire (asm.)
Power circuit board connecting cord (asm.)
Power supply connecting cord (asm.)

Check (AC120)

1 – 2 ≒ 13.5VAC

1 – 314.5V

+24V-GND, +28-GND
+5V-GND

Location of disassembly

A to F on pages 15 and 16

Locstion of disassembly

A to F on paged 15 and 16

52

[Filter circuit board]

Replacing procedure of F1 fuse

G) Draw out the related

connectors after performing
the work of disassembling
described on page 15 B,
loosen the inlet cover
setscrew to remove the inlet
cover. Then replace the fuse
with a new one.

Replacing procedure of the power box

H) Remove the bottom plate

after performing the work of
disassembling described on
page 15 C and D, and
remove the connectors of the
cord reel and the power box.

[Transformer]

Replacing the transformer

I) Draw out the related

connectors after performing
the work of disassembling
described on pages 15 and
16, A to F, remove three
screws in the transformer
(asm.) and replace it with a
new one.

[Main motor]

Replacing the main motor

J) Remove the rear panel.
K) Remove CN2 mounted on the

power board.

L) Remove CN4 mounted on the

microcomputer circuit board.
(Mp detecting circuit board)

M) Remove CN12 mounted on

the microcomputer circuit
board. (Thermistor (asm.))
Remove the setscrew in the
main motor installing plate
and replace the motor with a
new one.

F1

Setscrew

Screw

53

[Display circuit board]

[Switch circuit board and slide VR (variable resistor) circuit board]
(To CN1 on the microcomputer circuit board)

No

1
2
3
4
5
6
7
8

9
10
11
12
13
14

Wire color
BROWN
ORANGE
BLACK
YELLOW
WHITE
GRAY
PURPLE
BLUE
RED
BROWN
BLACK
RED
BLACK
WHITE

Point of end
CN1-1
CN1-2
CN1-3
CN1-4
CN1-5
CN1-6
CN1-7
CN1-8
CN1-9
CN1-10
CN1-11
CN1-12
CN1-13
CN1-14

Remarks
S/S
SLED1
GND
SLED2
REV (reverse)
STRBO (common wire)
HARF
TRM (thread trimming)

3.3V
SLVOL (slide VR)
GND
5V
GND
VOUT (with/without bobbin thread)

(To the microcomputer circuit board)

(To the microcomputer
citcuit board)

CN24

CN102

CN101

Copyright C 2004 ELNA

All Rights Reserved Throughout the World

Printed in JAPAN

Part No. 293-66606

041001 (E)