Astralux 9300A Operating instructions

REPAIR MANUAL
MODEL 9300A 9300A2
REPAIR MANUAL

ATTENTION
Be sure to observe the following, as they may well become causes for fire,
electric-shock, injuries, and damage to parts.
- Be sure to unplug power source before engaged in disassembly, installation,
adjustment.
- In case of installing please pay special care to clamp electrical cords, etc., scars
to sheath, mis-circuit, etc.
- Be sure to use regular standard part in replacing.
CONTENTS
1. Products specification
2. Out look
3. Names of principal parts
5. Removing methods of external parts
6. Adjusting methods of each part
.............................................................................................2
.....................................................................................................................3
..........................................................................................4
5.1 Face plate..........................................................................................................6
5.2 Arm top cover ....................................................................................................6
5.3 Sewing table complete ......................................................................................6
5.4 Cord reel cover ..................................................................................................6
5.5 Belt cover...........................................................................................................7
5.6 Free arm cover ..................................................................................................7
5.7 Free arm foot bush ............................................................................................7
5.8 Front cover .....................................................................................................7-8
5.9 Back cover.........................................................................................................9
6
6
4. Names of electronic parts
7. Trouble shooting of electrical parts
8. Circuit diagram
........................................................................................5
.1 Symbol instructions .........................................................................................10
.2 Play of arm shaft..............................................................................................11
6.3 Drop middle point of needle.............................................................................11
6.4 Height of presser foot ......................................................................................12
6.5 Needle flow at maximum zigzag width ............................................................13
6.6 Drop middle point of needle.............................................................................14
6.7 Needle position of zigzag ................................................................................15
6.8 Automatic needle threader adjustment............................................................16
6.9 Adjustment of feed rock shaft and feed lifting rock cam ..................................17
6.10 Height of needle bar ........................................................................................18
6.11 Timing of needle and hook ..............................................................................19
6.12 Distance-needle-hook......................................................................................20
6.13 Play between shuttle driver shaft gear and lower shaft gear...........................21
6.14 Play of shuttle driver shaft ...............................................................................22
6.15 Feed-dog height ..............................................................................................23
6.16 Position of feed-dog in relation to the needle plate (left to right) .....................24
6.17 Upper thread tension adjustment ....................................................................25
6.18 Shuttle hook tension adjustment .....................................................................26
6.19 Motor belt tension ............................................................................................27
6.20 Drop point of needle ........................................................................................28
6.21 Adjustment of BH.............................................................................................29
6.22 Bobbin winding problem ..................................................................................30
6.23 Replace the fuse..............................................................................................31
.................................................................32-35
..................................................................................................36-41
1

1. Products specification
2
Machine style
Hook system
Size of machine (mm)LxWxH
Weight (kg)
Power
Revolution per minute (R.P.M)
Needle
Max. forward feeding
Max. reverse feeding
Max stitch width
Electricity consuming
Thread take up lever
Exchange presser foot
Presser foot tension adjustment settlement
Needle plate
Handle
Spool rod
Thread cutting settlement
Needle settlement
Bobbin Winder
Upper thread threader
Sewing table
Patterns
Button hole system
Dial tension settlement
Presser foot lift settlement
Feed dog up-down change
Feed dog
Slowest speed
Slide volume
Auto stop
Motor
Accessory placement
Free arm
Drop-in Bobbin
407 x 175 x 290
8.5 (only machine)
Straight Stitch 70-800RPM
Button Hole 70-600RPM
Normal Stitch 70-700RPM
Bobbin Winder 70-800RPM
Reverse Stitch 70-800RPM
Lowest Speed 70RPM
HAX1 #9-#16
4.5mm
3.5mm
7mm
Lamp 12V 5W
Slit type
Fixed type
Transparent window
Handle type
Horizontal style
Inclusive within face plate
Single direction availability
Self releasing with automatic stop
Automatic upper thread threader
Accessory placement
Practical usage 40 kinds
One step button hole lever
Standard settlement
2 steps
Yes, lever controlling in the base
6 gears
Yes. (Both forward and backward)
Feedback function
Self stopping while bobbin windering
Motor overload settlement
Inside of sewing table
AC 120V/60Hz (U.S.A) 230V/50Hz (Eur.)
Touch controlling
TYPE
ITEM 9300A 9300A2

2. Out look
3
Model 9300A
Model 9300A2
910
11
12 13 14 15 16
12348
57
6
17 18 19 20 21 22 23 24
25 26 27 28 29 30 31 32
33 34 35 36 37 38 39 40

1. Tension dial
2. Bobbin thread guide
3. Upper thread guide
4. Thread take-up lever
5. Face plate
6. Needle up/down position button
7. Auto-lock button
8. Thread cutter
9. Reverse button
10.Buttonhole lever
11. Auto needle threader
12.Needle plate
13.Sewing table and accessory box
14.Speed limiting adjustment lever
15.Bobbin winder
16.LCD (Liquid crystal display)
17.Function of buttons
18. Stitch selection buttons
19. Handwheel
20.Main power switch
21. Foot controller connector
22-A.
22-B.
23.Hole for second spool pin
24. Handle
25.Horizontal spool
pin
26. Drop feed lever
27.Presser foot lifter
Japanese version (automatic
rewinding)
European version
USA version
3. Names of principal parts
4
19
20
21
23
24
26
27
25
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
910
11
12 13 14 15 16
12348
57
6
17 18 19 20 21 22 23 24
25 26 27 28 29 30 31 32
33 34 35 36 37 38 39 40
16 (A)
17 (B)
18 (C)
Model
9300A Model
9300A2
22-A 22-B
Eur. U.S.A

5
1.
2-A.
2-B.
3-A.
3-B.
3-C.
4.
5. LCD panel
6. Keyboard
7. Transformer
8. DC motor
9. Foot controller connector
10-A.
10-B.
11.
12. Lamp
13.
Slide volume
Pulse motor (zigzag)
Photo sensor complete (zigzag)
Photo sensor complete
(needle position)
Photo sensor complete (needle flow)
Photo sensor complete (speed)
Bobbin winder micro switch
Pulse motor (stitch length)
Photo sensor complete
(stitch length)
Up & down fixed position switch
Photo sensor complete (B/H)
: Set on the front cover
4. lectronic partsNames of e
1
13
12
9
5
6
7
8
4
10
B
A
3B
A
C
2
11
B
A
910
11
12 13 141516
12348
57
6
17 18 1920 2122 23 24
25 26 27 28 2930 31 32
33 34 35 36 373839 40
9300A
9300A2

5-4 Cord reel cover
- Lay down machine. Remove 1 cushion
rubbers (d).
- Remove 4 screws (e, f, g, h). (4)
- Remove cord reel cover.
e
f
g
d
Cord reel cover
4
Sewing table complete
3
5-1 Face plate
Remove screw (a) and remove the face plate.
(1)
5-2 Arm top cover
Remove 2 screws (b, c) and remove the arm
top cover. (2)
5-3 Sewing table complete
Keep the snap-in sewing table horizontal, and
pull it in the direction of the arrow. (3)
5. Removing methods of external parts
a
Face plate
6
1
bc
Arm top cover
2
h

p
Back cover
8
l
Free arm foot bush
7
j
Free arm cover
6
iBelt cover
5
5-5 Belt cover
- Remove screw (i) and remove belt cover. (5)
5-6 Free arm cover
Remove 2 screws (j, k) and remove the free
arm cover. (6)
5-7 Free arm foot bush
Remove 4 screws (l, m, n, o) and remove the
free arm foot bush. (7)
7
5-8 Front cover
- Remove face plate, arm top cover, sewing
box complete, cord reel cover, belt cover, and
free arm cover and free arm foot bush first.
- Lift handle and remove 2 screws (p, q). (8)
k
m
no
q

- Remove front cover following direction of
arrow. (12)
Attention:
Be sure to remove the front cover carefully,
because the leader wire and the body are
connected together.
Front cover
- Loosen screw (s) about 3mm. (10)
First using electric torch (flash light) etc to
locate screw (s) position which deeply inside
the machine.
Note 1:
s
10
9
r
- Loosen screw (r) about 3mm. (9)
8
- Remove screw (t). (11)
s
t
11
12

9
5-9 Back cover
- Remove front cover first.
- Remove 2 screws (u, v). (13)
Back cover
- Loosen screw (w) about 3mm. (14)
w
- Remove screw (x).
- Loosen screw (y) about 3mm.
- Remove the back cover. (15)
13
uv
x
y
14
15

6-1 Symbol instructions
6. Adjusting methods of each part
10
Noise occur while the machine is running.
Skip-over stitching, needle breakage, and problems associated with needle.
Delivery of cloth to be in disorder and insufficient, problems associated with delivery
amount.
Stitch tightening problem.
BH right and left stitching is not even, incorrect length and problems associated with
buttonhole sewing.
Bobbin winding problem.

6-2 Play of arm shaft
1) Remove the face plate and arm top
cover.
2) Remove the 2 screws (a, b) of arm shaft
collar (A). (1)
3) Pull hand wheel backward.
4) Push arm shaft collar (A) to left tightly
against arm shaft bushing (B), and then
fasten and secure screws (a, b). (1)
5) Be sure proper distance between arm
shaft collar and arm shaft bushing. (2)
6) Be sure arm shaft operates smoothly
after adjustment.
7) Arm shaft collar and arm shaft bushing
being too tightly closed might cause
insufficient operation of arm shaft.
8) Follow step 1, 2, 3 in order to re-adjust.
a
b
A
B
2
1
11
6-3 Drop middle point of needle
- Choose patterns #1.
1) Remove face plate.
2) Loosen screw (a) of needle bar
supporter.
3) Turn needle bar supporter (A) forward /
backward to adjust needle.
Backward = to move needle forward
Forward = to move needle backward
4) Set needle position above center of
needle plate and fasten screw (a).
a
A
forward
backward

6-4 Height of presser foot
1) Remove face plate and lift up presser
bar lifter lever (A). (1)
2) Loosen screw (a) of presser bar bracket.
(2)
3) Place gauge (B) (6.0~6.2mm) on top of
needle plate. (3)
4) Pull down presser bar lifter lever so
bottom of presser foot and top surface
of gauge would meet.
5) Secure tightly screw (a).
6) The correct setting of gauge should be
6.0~6.2mm.
B
a
A
12
1
2
3

6-5 Needle flow at maximum zigzag
width
- Choose patterns #5, zigzag 7 mm.
1) Remove front cover.
2) Set needle bar at its lowest point when it
swings to left. Turn hand wheel to move
the needle bar upward. The vertical
distance in which the needle point goes
up at the left position from the top of the
needle plate should be 5~10mm. (1)
3) If needle flow is less than 5 mm, loosen
the screw of rotary sensor collar (a), and
turn rotary sensor collar (A) toward back
( ). (2)
4) If needle flow is more than 10 mm, turn
rotary sensor collar (A) toward front ( ).
(2)
5) Tighten the screw (a) after making sure
the needle flow is between 5 mm to 10
mm.
6) Be conscious if the rotary sensor collar
(A) encounters photo sensor's (B)
blocking movement can be operate
normally after the adjustment.
13
1
5mm 10mm
Needle plate
B
a
backward
forward
2
A

6-6 Drop middle point of needle
- Choose patterns #1.
1) Remove face plate.
2) Loosen screw (a) of needle bar driving
rod pin (b). (1)
3) Adjust needle by pushing (b) clockwise /
counter-clockwise.
4) Make sure needle drops on middle of
needle hole. After adjusting, re-tighten
screw. (2)
a
b
Needle
hole
Needle
14
1
2

6-7 Needle position of zigzag
- Choose patterns #5, zigzag 7 mm.
1) Remove face plate
2) Loosen screw (a) of needle bar driving
rod pin (b). (1)
3) Adjust needle by pushing (b) clockwise /
counter-clockwise.
Clockwise left
Counter-clockwise right
4) Make sure needle drops on left / right of
needle hole with even distance to the
edge of needle hole, and then fasten the
screws. (2)
5) After the adjustment of z/z needle
position, re-confirm the needle position
of zigzag.
Needle hole
Needle
15
2
a
b
1

16
a
A
2
0.1mm
Needle
Threader hook
1
Threader
hook
6-8 Automatic needle threader
adjustment
)
)
(1)
) (2)
(A)
(A)
(A)
1 Check the threader hook.
If it is damaged, change new one.
If it is inclined, adjust the threader hook
properly.
2 If the threader hook can not enter needle
hole freely, please adjust the threader
stopper.
3 Adjust the stopper:
- Remove face plate and turn hand wheel
to raise needle bar to its highest position.
- Loosen screw (a) of the threader stopper
.
- Move the stopper upward and the
threader hook will become higher.
Move the stopper downward and the
threader hook will become lower.
- Adjust the stopper to the proper position
for entering needle hole freely.
- Fasten the screw .(a)

6-9 Adjustment of feed rock shaft
and feed lifting rock cam
1) Remove cord reel cover, free arm base
and free arm foot bush.
2) Turn the hand wheel to make the needle
rise to its highest point.
3) Use the feed shaft test gauge (A) to
check. (1)
4) Attach the magnetic feed shaft test
gauge (A) on the lower shaft to exam if
the screws of feed lifting rock cam (a, b)
are parallel. (2)
5) If the screws of feed lifting rock cam are
not parallel:
Loosen the screw (a) of feed lifting rock
cam complete (B) and adjust the screws
and front gauge correction (C) to the
middle.
Loosen the screw (b) of feed rock cam
complete (D) and adjust the screws and
front gauge correction (E) to the middle.
a
A
A
17
1
2
b
B
C
D
E

a
E
6-10 Height of needle bar
- Choose patterns #1.
1) Remove face plate and needle plate.
2) Remove the screws of rotary hook plate
(A, B) and rotary hook plate, and take out
the shuttle hook.
3) Put the gauge of height of needle
2.54~2.80 mm (D) into the shuttle hook
holder, and turn the hand wheel to set the
needle at the lowest point.
4) Turn the gauge of height of needle, and
the standard is between 2.54~2.80 mm.
5) If it's not fit the standard of measure, loose
the needle bar bracket (a) to adjust the
needle bar's (E) position for measuring the
correct height of needle bar.
Lift the needle bar will cause insufficient
height of needle bar. Pull down the needle
bar, and the height of needle bar will too
deep. (3)
6) Fasten the screws (a) after confirming the
height of needle bar. (When the needle
position is on the lowest point, the
distance between the top of needle hole
and the path of shuttle hook holder should
be 4.75 0.1mm, refer to iconography 4)
7) Re-assemble back the rotary hook plate
after adjusting the height of needle bar.
Be sure the play of shuttle driver shaft is
correct. (Please reference page 22 for
examination)
±
18
1
2
C
A
B
D
4.75 0.1mm±
Needle
Needle hole
4
3

a
19
6-11 Timing of needle and hook
- Choose patterns #5, zigzag 7 mm.
1) Set the needle bar at its lowest point
when it swings to the left. Place clamp
(A) around the needle bar, tighten its
screw (a) but still allowing movement. (1)
2) Place gauge (B) (4.0mm) between the
needle bar support and clamp, tighten
(A) until it is at its highest position, and
then tighten its screw. (1)
3) Remove gauge (B), turn hand wheel to
enable needle bar to rise little by little
and stop at the position when presser
plate reach to the top. (2)
4) Turn the hand wheel until the shuttle
hook holder point is on the right side of
needle, the distance between needle
hole and it should be 1.1~1.4 mm. (3)
If the distance is incorrect, loosen the
screw (a) of needle bar bracket, and
adjust the position of needle bar (C) to
correct it. (4)
1
2
4
A
B
a
3
1.1~1.4 mm
Needle's lowest
position
C