Elna 3210 Sewing Machine Service Manual

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ELNA
3210 - 3230
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SERVICE MANUAL
07/03 Printed in Switzerland 395 903-12

All manuals and user guides at all-guides.com
Elna International Corps. SA 3210 / 3230 Service manual
Contents
What to do when 1-3
Service Access
Face Cover 4
Top Cover 4
Belt Cover 5
Base 5
Front Cover 6
Rear Cover 7
Mechanical Adjustment
Needle Thread Tension 8

Presser Bar Height and Alignment 9
Needle Swing in Straight Stitch Sewing 10
Needle Swing 11
Needle Position Misalignment 12
Needle Drop Position 13
Stretch Stitch Feed Balance 14
Feed Dog Height. 15
Needle Bar Height 16
Needle Timing to Hook 17
Clearance between Needle and Hook 18
Backlash Between Hook Gear and Lower Shaft Gear 19
Zero Feeding 20
Needle Stop Position (3230 only) 21
Buttonhole Feed Balance . 22
Buttonhole Length 23
Auto-Stop Buttonhole (Model 3230) 24
Replacement and Adjustment of Needle Threader Plate 25
Motor Belt Tension 26
B-Board and Connector Location (Model 3230) 27
Replacement of B-Board and Fuse (Model 3230). 28
Wiring of Terminal in Machine Socket 29
Content
CONDITION CAUSE HOW TO FIX REFERENCE

1. Skipped 1. Needle is not inserted Insert the needle properly.
stitches
properly. Change the needle.
2. Needle is bent or worn.
3. Incorrectly threaded. Rethread.
4. Needle or thread is Use the recommended
inappropriate for fabric sewing needle and thread.
being sewn. Use a #11 blue tip needle.
5. Sewing on stretch fabric. Adjust the presser bar level
6. Presser foot pressure is to make the pressure
too weak. stronger.
7. Inappropriate needle bar See mechanical

height. adjustment
"Needle Bar Height". Page 16
8. Inappropriate needle to See mechanical
hook timing. adjustment
"Needle Timing to Hook". Page 17
9. Inappropriate needle to See mechanical
hook clearance. adjustment "Clearance Page 18
Between Needle and Hook
2. Fabric not 1. Presser foot pressure is Adjust the presser bar level
moving
too weak. to make the pressure
stronger.
2. Incorrect feed dog See mechanical adjustment
height. ''Feed Dog Height". Page 15
3. Feed dog is in down Raise the Feed dog level.
position.
4. Thread on bottom side of Make sure to bring both
fabric is jammed up needle and bobbin thread
under the foot when
starting sewing.
5. Feed dog teeth are worn. Change the feed dog.
Page 01

3 Needle thread 1. Initial sewing speed is Start with medium speed
breaks too fast.
2. Thread path is incorrect. Use the proper thread path.
3. Needle is bent or dull. Replace with a new needle.
4. Upper thread tension is Adjust needle thread
too strong. tension correctly.
5. Needle size is Use appropriate needle for
inappropriate for fabric. fabric and thread in use.
6. Needle eye is worn. Change the needle.
7. Needle hole in needle Repair the hole or replace
plate is worn or burred. the needle plate.
4 Bobbin thread 1. Incorrectly threaded Thread bobbin correctly
breaks. bobbin.
2. Too much thread is on Adjust the position of
the bobbin. stopper.
3. Lint is stuck inside the Clean the shuttle.
bobbin holder.
4. Thread quality is too low. Change to a higher quality
sewing thread.
5. Thread is jamming Clear out the jamming
around the bobbin. thread.
5. Needle breaks. 1. Needle is hitting the See mechanical adjustment
needle plate “Needle Drop Position” Page 13
2. Needle is bent or worn. Change the needle
3. Needle is hitting the See mechanical adjustment
shuttle. “Clearance between Page 18
Needle and Hook”
4. The fabric moves while See mechanical adjustment
the needle is piercing it, “Needle Swing”. Page 11
or the needle zigzags Guide the fabric gently
while in fabric. while sewing.
5. Fabric is being pulled too
strongly while sewing.
Page 02

6. Noisy 1. Backlash between See mechanical adjustment
operation shuttle hook gear is too “Backlash between Hook Page 19
great. Gear and Lower Shaft
Gear”.
2. Lower shaft gear is Eliminate the looseness.
loose.
3. Inappropriate belt See mechanical adjustment
tension. “Motor Belt Tension”. Page 26
4. Not enough oil. Oil all moving parts.
5. Upper shaft is loose. Eliminate the looseness.
7. Deformed 1. Inappropriate feed See mechanical adjustment

pattern. balance. ”Stretch Stitch Balance” Page 14
2. Inappropriate zigzag See mechanical adjustment
synchronization. “Needle Swing”. Page 11
3. Upper thread tension is Adjust the needle thread
too strong. tension correctly.
8. Improper 1. Buttonhole stitch balance See mechanical adjustment
buttonhole is not correct. “Buttonhole Feed Balance”. Page 22
results. 2. Changing to bar tack is See mechanical adjustment
too early or will not work. “Buttonhole Length”. Page 23
Page 03
FACE COVER
To remove:
1. Remove the cap A and the screw B.
2. Remove the face cover C.
To attach:
1. Follow the above procedure in reverse.
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TOP COVER
To remove:
1. Remove the face cover (see here above).
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2. Remove the two screws A

3. Remove the screws B and C
4. Remove the handle with the top cover.
To attach:
5. Follow the above procedure in reverse.
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Page 04
BELT COVER
To remove :
1. Remove the face and top cover (see page 4).
2. Remove the cap A.
3. Remove the screw B
4. Pull out the stitch selector D
5. Remove the screw C and remove the belt cover.
To attach: Follow the above procedure in reverse.
BASE
To remove :
1. Remove the screws A to F.
2. Remove the base G.
To attach : Follow the above procedure in reverse.
Page 05
FRONT COVER
To remove :
1. Remove the face and belt cover (see pages 4 and 5)
2. Loosen the screw A and F
3. Remove the screws B, C, D and E.
4. Remove two connectors for model 3230.
5. Remove the front panel.
To attach : Follow the above procedure in reverse.
Page 06
REAR COVER
To remove:
1. Remove the face cover, top cover and belt cover (see pages 4 and 5)
2. Loosen the screw A
3. Remove the screws B, C and D.
Page 07
Needle Thread Tension
The standard tension should be 75 to 90 grams when the tension dial is set at "A" (Auto) for Model
3230 or at "4" for Model 3210, measured with a #50 white polyester thread being pulled at
approximately 50 mm/sec. If the tension is outside the standard range, adjust it as follows.
(Make sure the foot is lowered.)
Adjustment procedure:
1. Remove the face cover (see page 4).
2. If the thread tension is too tight: Turn the adjusting screw C in the direction of A.
3. If the thread tension is too loose: Turn the adjusting screw C in the direction of B.
4. Attach the front cover.
Page 08
PRESSER BAR HEIGHT AND ALIGNMENT

To check:
When the presser foot is raised, the clearance between the presser foot and the needle plate should
be 6.0 mm.
When the presser foot is lowered, Th edge of Th foot and Th feed dog Windows on Th needle plate
should be parallel.
1. Remove the face cover (see page 4).
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2. Raise the presser foot lifter A and loosen the screw B.
3. Adjust the distance between the presser foot C and the needle plate D to 6 mm.
4. Tighten the screw B securely.
5. Attach the face cover.
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Note: When tighten the screw B, make sure that both sides of the presser foot are parallel to the
feed dog windows on the needle plate D.
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Page 09
NEEDLE SWING IN STRAIGHT STITCH SEWING

To check:
If the needle swings when running the machine with zigzag stitch, at width “0”, than correct this as
follows:
1. Select zigzag stitch and set the stitch width dial at “0”.
2. Remove the front cover (see page 6).
3. Loosen the set screw A.
4. Tighten the screw A while pushing the stitch width adjusting plate B up against the stitch width
adjusting arm.
5. Check if the needle does not swing by running the machine.
Page 10
Needle Swing
If the needle swings when it is still in the fabric, correct it as follows:
Adjusting procedure:
1. Remove the face cover and top cover (See pages 4-5).
2. Select zigzag stitch and set the stitch width control at "6.5".
3. Loosen 2 screws A in the upper shaft worm B.
4. Adjust the needle swing by turning the handwheel by hand while holding the worm B so as not to
rotate it, until the needle starts to swing 2-3 mm above the needle plate when coming out from
the right side G of the hole in the needle plate D.
5. Tighten 2 screws A firmly.
6. Attach the top cover and face cover.
Note:
The upper shaft shall turn smoothly without an excess backlash in the worm gear. If necessary
adjust the backlash by pushing the worms B in direction E or F.
Seite 11
Needle Position Misalignment
To check:
Select the pattern " " and set the stitch width control at "6.5". Rotate the handwheel several turns
until the needle comes in the center needle drop position.
Turn the stitch width control from "0" to "6.5" and vice versa.
If the needle swings, correct it as follows:
1. Select the pattern " and set the stitch width control at "6.5".
2. Rotate the handwheel several turns until the needle comes in the center needle drop position.
3. Remove the front cover (See page 6).
4. Loosen the setscrew A and C. Slightly tighten the setscrew A.
5. Adjust the position of the stitch width-adjusting arm B so that the needle does not swing when
rocking the stitch width-adjusting lever. Tighten the setscrews A and C.
Page 12
Needle Drop Position
The needle should drop in the center of the hole in the needle plate when the straight stitch is
selected and the stitch width control is set at "O".
The clearance between the needle and each side of the needle hole should be 0.2 mm or more
when the needle swings maximum zigzag width.
1. Remove the face cover (See page 4).
2. Check the needle drop position of the straight stitch with the stitch width "O" and the zigzag stitch
with the stitch width ''6.5".
3. Loosen the set screw A and adjust the needle drop position by turning the eccentric pin B.
Note:
The eccentric pin should be positioned with its off-centered head facing downward.
Tighten the set screw A after adjustment is finished.
Attach the face cover.
Page 13
Stretch Stitch Feed Balance

If the stretch stitch patterns are deformed when sewing the patterns with the feed balancing dial is
set at the standard position (see F), correct it as follows:
1. Select the straight stretch stitch and set the stitch width control at "O".
2. Set the feed balancing dial at the standard position" ".
3. Place a piece of paper on the machine and lower the presser foot. Rotate the handwheel
several turns and check the needle marks in the paper.
4. Remove the cap E on the rear cover to access the adjusting screw G.
5. If the forward feed is longer (A>B): Turn the adjusting screw G in the direction of (C).
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6. If the backward feed is longer (B>A): Turn the adjusting screw G in the direction of (D).
7. Attach the cap E.
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Page 14
FEED DOG HEIGHT
The height of the deed dog should be 0.8-0.9 mm above the needle plate.
1. Select the straight stitch and set the stitch width control at "O".
2. Set the foot pressure dial at "3" and lower the foot.
3. Loosen the setscrew A
4. Turn the handwheel to bring the feed dog to its highest position.
5. If the feed dog height is lower than 0.8 mm: Turn the adjusting screw B in the direction of C.
6. If the feed dog height is higher than 0.9 mm: Turn the adjusting screw B in the direction of D.
7. Tighten the setscrew A.
Page 15
NEEDLE BAR HEIGHT
When the tip of the hook D meets the left side of the needle in ascending travel of the needle from its
left and lowest position, the distance between the top of the needle eye and the tip of the hook D
should be in the range of 1.6-2.0 mm.
1. Select the straight stitch and set the stitch width control at ''6.5".
2. Remove the needle plate A and bobbin holder B.
3. Turn the handwheel until the tip of the hook D meets with the right side of the needle.
4. Remove the face cover and loosen the setscrew C.
5. Adjust the needle bar height by moving the needle bar up or down.
6. Tighten the setscrew C.
Note:
Be sure that the groove on the needle bar F is facing right in the front.
7. Attach the face cover, bobbin case and needle plate.
Page 16
Needle Timing to Hook
When the hook point meets with the right side of the needle, the height of needle point from its
lowest and left most position should be 3.25-3.55 mm.
1. Select the straight stitch and set the stitch width control at "6.5".
2. Remove the presser foot, needle plate and bobbin holder.
3. Remove the front cover (See page 6).
4. Turn the handwheel to bring the needle C to its lowest position.
5. Loosen the 2 setscrews A in the lower shaft gear B.
6. Turn the handwheel to raise the needle bar 3.4 mm from the lowest position.
7. Rotate the lower shaft gear until the hook point meets the right side of the needle, while holding
the handwheel in place.
8. Tighten the setscrews A.
10. Attach the bobbin holder, needle plate and presser foot.
Page 17
Clearance between Needle and Hook

The clearance between the needle and hook should be -0.10 to +0.05 mm.
1. Select the zigzag stitch and set the stitch width control at "6.5".
2. Remove the needle plate and bobbin holder.
3. Replace the needle with the gauge D 100240-10 and tighten the needle clamp screw.
4. Remove the face cover (See page 4.).
5. Turn the handwheel to bring the hook point B just behind the gauge 100240.
6. Loosen the setscrew A and adjust the clearance between the needle and hook point to -0.10 to
0.05 mm by moving the top end of the needle supporter C back or forth.
9. Attach the bobbin holder and needle plate. Replace the master needle with the sewing needle.
Page 18
Backlash between Hook Gear and Lower Shaft Gear

The rotary play of the hook point should be 0.8 mm or less when it is in between the span of the feed
dog teeth and, the gears should turn smoothly.
1. Remove the needle plate and bobbin holder.
2. Remove the front cover (See page 8.).
3. Loosen the setscrew A.
4. If the rotary play E is too large: Turn the lower shaft bushing B in the direction of C.
5. If the rotary play E is too small: Turn the lower shaft bushing B in the direction of D.
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8. Attach the bobbin holder and needle plate.
Note:
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After adjustment of the backlash, check the needle timing to hook and feed dog height, and adjust
them if necessary es
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Page 19
Zero Feeding
The machine should not feed the fabric when the stitch length control is set at "O".
1. Select the straight stitch and set the stitch length control A at "O".
2. Remove the Top cover (See page 4).
3. Place a piece of paper on the machine and lower the presser foot. Rotate the handwheel to
check if the paper is fed or not.
4. Loosen the setscrew B on the feed adjusting gear near to bobbin winder C.
5. Turn the feed adjusting gear with the screw B to adjust the Zero feeding.
6. Tighten the setscrew B.
7. Attach the Top cover.
Page 20
Needle Bar Stop Position (Model 3230 only)
The height of the needle point should be 10-14 mm above the needle plate when the machine stops.
If not, correct it as follows:
1. Remove the base (See page 5.)
2. Turn the power switch ON and press the needle up/down button twice to bring the needle bar to
the highest position.
3. If the needle point is higher than 14 mm: Loosen the setscrew C and turn the lower shaft
shielding plate E in the direction of A.
4. If the needle point is lower than 10 mm: Loosen the setscrew C and turn the lower shaft shielding
plate E in the direction of B.
5. Tighten the setscrew C.
6. Press the needle up/down button twice and check the needle stop position.
7. Attach the base.
Page 21
Buttonhole Feed Balance

When sewing a buttonhole with the BH pitch balancing lever set at the neutral position, the stitches
on each side of the buttonhole should be of the same stitch density. A range of 9-12 stitches in the
"backward feeding" (right side row) against 10 stitches in the "forward feeding" (left side row) is
considered acceptable.
1. Sew a test buttonhole.
2. Loosen the setscrew D in the ring E.
3. If the left row (backward feed) is less denser (C): Rotate the ring in the direction of (C).
4. If the left row (backward feed) is denser (B): Rotate the ring in the direction of (B
Page 22
Buttonhole Length
The machine should sew a buttonhole in a single step and the buttonhole length should be about 3
mm longer than the length set by buttonhole foot R.
1. Attach the buttonhole foot R.
2. Place a button in the button holder on the foot. Sew a test buttonhole.
3. If the buttonhole length is shorter then the button: Turn the adjusting screw D in the direction of
E.
4. If the buttonhole length is longer or the machine will not sew the back bartack: Turn the adjusting
screw D in the direction of F.
5. The knob of the buttonhole lever should align with the end of a horn C on the buttonhole foot R.
X = Buttonhole is short.
XX = Buttonhole is to long or machine will not sew bartack
Page 23
Auto-Stop Buttonhole (Model 3230)
The machine will stop automatically when buttonhole is completed.

If the machine stops too early or too late, correct it as follows:
1. Remove the face cover (See page 4.).
2. Loosen the setscrew (A).
3. If the machine stops too early: Move the adjusting plate in the direction of (B).
4. If the machine stops too late or does not stop: Move the adjusting plate in the direction of (C).
5. Tighten the adjusting screw (A).
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Page 24
Replacement and Adjustment of Needle Threader Plate
To replace:
Pry out the threader plate holder with a screwdriver while pushing and holding the threader knob
(See fig. 1.).
Align the groove on the new threader plate holder with the pin (B) on the threader shaft. Push the
threader plate holder (C) up until it snaps in place.
1. If the threader hook thrusts or hits against either left or right edge of the needle eye: Loosen
the setscrew (E) and adjust the position of the threader plate (H) (See fig. 2).
2. If the threader hook thrusts against either top or bottom edge of the needle eye, or misses the
needle eye: Remove the face cover and loosen the setscrew (F). Move the threader position
setting holder (G) up or down to adjust the hook position.
Page 25
Motor Belt Tension

1. Remove the front cover (See page 6.).
2. Slightly loosen the 2 setscrews (A).
3. Move the motor to adjust the motor belt tension so that the belt is bent 7-9 mm when pressing
the middle of the belt with approximately 300 grams of pressure.
4. Tighten the setscrews
Page 26
B-Board and Connector Location (Model 3230)

To access:
1. Remove the Rear cover (see page 7).
2. Remove the two screws A and B.
3. Remove the circuit box lid C.
1. Machine socket connector (primary) 2. Transformer connector (primary)

3. Motor connector 4. Needle position sensor connector
5. Bobbin winding switch connector 6. BH limited switch connector
7. BH selecting switch connector 8. Photo sensor connector
9. Slide volume connector 10. Machine socket connector
11. LCD connector 12. Transformer connector (secondary)
13. Lamp connector
Page 27
Remplacement of B-Board and fuse (3230 only)
1. Remove the rear cover (see page 7).

2. Remove the circuit box lid (see page 27).
3. Disconnect all connectors and unscrew the four screws B.
4. Replace the circuit board and fix it.
5. Insert all connectors (see page 27)
6. Attach the circuit board lid and the rear cover.
To replace the fuse:

1. Pry out the fuse A with a screwdriver.
2. Replace the fuse and push it down into the fuse clip.
Page 28
Wiring of Terminals in Machine Socket
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All manuals and user guides at all-guides.

07/03 Printed in Switzerland 395 903-12

Elna International Corps. SA 3210 / 3230 Service manual

What to do when 1-3

Needle Thread Tension 8

Elna International Corps. SA 3210 / 3230 Service manual

CONDITION CAUSE HOW TO FIX REFERENCE

7. Inappropriate needle bar See mechanical

Elna International Corps. SA 3210 / 3230 Service manual

CONDITION CAUSE HOW TO FIX REFERENCE

Elna International Corps. SA 3210 / 3230 Service manual

CONDITION CAUSE HOW TO FIX REFERENCE

7. Deformed 1. Inappropriate feed See mechanical adjustment

Elna International Corps. SA 3210 / 3230 Service manual

2. Remove the two screws A

Elna International Corps. SA 3210 / 3230 Service manual

To attach: Follow the above procedure in reverse.

To attach : Follow the above procedure in reverse.

Elna International Corps. SA 3210 / 3230 Service manual

To attach : Follow the above procedure in reverse.

Elna International Corps. SA 3210 / 3230 Service manual

Elna International Corps. SA 3210 / 3230 Service manual

Needle Thread Tension

Elna International Corps. SA 3210 / 3230 Service manual

PRESSER BAR HEIGHT AND ALIGNMENT

1. Remove the face cover (see page 4).

Elna International Corps. SA 3210 / 3230 Service manual

NEEDLE SWING IN STRAIGHT STITCH SEWING

Elna International Corps. SA 3210 / 3230 Service manual

Elna International Corps. SA 3210 / 3230 Service manual

Needle Position Misalignment

Elna International Corps. SA 3210 / 3230 Service manual

Needle Drop Position

Elna International Corps. SA 3210 / 3230 Service manual

Stretch Stitch Feed Balance

Elna International Corps. SA 3210 / 3230 Service manual

FEED DOG HEIGHT

Elna International Corps. SA 3210 / 3230 Service manual

NEEDLE BAR HEIGHT

Elna International Corps. SA 3210 / 3230 Service manual

Needle Timing to Hook

Elna International Corps. SA 3210 / 3230 Service manual

Clearance between Needle and Hook

Elna International Corps. SA 3210 / 3230 Service manual

Backlash between Hook Gear and Lower Shaft Gear

Elna International Corps. SA 3210 / 3230 Service manual

Elna International Corps. SA 3210 / 3230 Service manual

Needle Bar Stop Position (Model 3230 only)

Elna International Corps. SA 3210 / 3230 Service manual

Buttonhole Feed Balance

Elna International Corps. SA 3210 / 3230 Service manual

Elna International Corps. SA 3210 / 3230 Service manual

Auto-Stop Buttonhole (Model 3230)

The machine will stop automatically when buttonhole is completed.

Elna International Corps. SA 3210 / 3230 Service manual

Replacement and Adjustment of Needle Threader Plate

Elna International Corps. SA 3210 / 3230 Service manual

Motor Belt Tension

Elna International Corps. SA 3210 / 3230 Service manual

B-Board and Connector Location (Model 3230)