JUKI LZ-2290A-SS-7, LZ-2290A-SS, LZ-2290A-SU, LZ-2290A-DS, LZ-2290A-DS-7 Engineer's Manual

ENGINEER’S MANUAL

40011067

No.E355-01

Computer-controlled, Direct-drive, High-speed, 1-needle,
Lockstitch, Zigzag Stitching Machine

LZ-2290A Series

IP-100A / SC-915
IP-100D / SC-916

R

− 1 −

LZ-2290A-SU / -7

4,500 rpm (*1)

2.5 mm/2.5 mm (*3)

(Stepless fine adjustment)

1.4mm

LZ-2290A-SS / -7

5,000 rpm (*1)

5 mm/4 mm (*3)

(Stepless fine adjustment)

1.2 mm

LZ-2290A-DS / -7

5mm/4 mm (*3)

(Stepless fine adjustment)

1.2 mm

Light- to medium-weight materials

10 mm (*2)

8 kinds 14 patterns

(Custom pattern : 500 stitches, 20 kinds can be stored.)

SCHMETZ 438, ORGAN DPX5 : #65 to #90

178 mmX517 mm

4,000 rpm (Excluding a certain territory of export)

33.4 mm

Built-in in the upper face of machine head type (with bobbin thread retaining plate)

Electromagnetic front-wiping system (WB), electromagnetic side-wiping system (CB)

Built-in electromagnetic system

5.5 mm

10 mm

6 to 6.5 mm

Direct drive system (compact AC servo motor)

Timing belt system

Rated output 450W

3-phase 200 to 240V, Single phase 100 to 120V

DC34V

Presser foot micro-lifting screw is provided as standard.

1. AK-121 (Auto-lifter : Part No. : GAKA21000B0)

2. Exclusive grease tube for maintenance 10g (JUKI grease A Part No. : 40006323)

3. Exclusive grease can for maintenance 500g (Part No. : 23640204)

4. Touch-back kit asm. (Part No. ; 40010795) ... Other than WB, CB, OB, A-SR)

5. Optional switch kit (Part No. ; 40003640)

LZ-2290A-DU / -7

2.5mm/2.5 mm (*3)

(Stepless fine adjustment)

1.4mm

1. SPECIFICATIONS

* 1 : The sewing speed is regulated in accordance with zigzag width (A-SR : zigzag width and feed amount).
* 2 : Zigzag width is regulated to 8 mm at the time of delivery. (Max. zigzag width of all machines is 10 mm.)
* 3 : Normal and reverse feed amounts are regulated to 2 mm at the time of delivery.

Model
Application
Max. sewing speed
Max. zigzag width
Max. feed amount
(Normal/reverse)
Stitch pattern

Needle
Dimension of the bed
Number of revolution
of resistor pack
Needle bar stroke
Bobbin winder
Wiper
Automatic reverse
stitching device
Lubrication

Lift of the presser foot
(by hand lifter)
Lift of the presser foot
(by knee lifter)
Lift of the presser foot
(by AK auto-lifter)
Kind of the hook
(Part No.)
Bobbin case (asm.)

Height of the feed dog (standard)
Lubrication of the face
plate section
Drive system
Transmission function
Motor output
Operating power
Solenoid drive power
Additional function
Major optional
devices

1
2
3
4

5

6
7
8

9
10
11
12

13

14

15

16

17

18

19
20

21
22
23
24
25
26
27

Lubrication system to oil tank for hook
lubrication
JUKI New Defrix Oil No. 1 is used.
(Equivalent to ISO VG7)
Plunger pump is employed.

22525877

40003598 (with idle-prevention spring)

Minute quantity lubrication by oil wick

Full non-lubrication

23557259 (Non-lubrication hook)

Non-lubrication

4,000 rpm (*1)

LZ-2290A-SR-7

5,000rpm (*1)

5mm/5 mm

(0.1 adjustment by electronic control)

14 kinds 20 patterns

Stepping motor
control

Lubrication system to
oil tank for hook
lubrication
JUKI New Defrix Oil
No. 1 is used.
(Equivalent to ISO
VG7)
Plunger pump is
employed.

22525877

40003598

(with idle-

prevention spring)

1.2 mm

Minute quantity
lubrication by oil wick

(1) Specifications of the machine head

40003609 (with idle-prevention spring)

− 2 −

(2) Stitch pattern table

Name of pattern

Stitch

pattern

Blind stitch (right)

Blind stitch (left)

Custom pattern

T stitch (left)

T stitch (right)

Pattern 1

Pattern 2 (fagoting)

Pattern 3

Pattern 4

Standard
scallop

Crescent
scallop

Equal-width
scallop

Equal-width
scallop

Standard
scallop

Crescent
scallop

Equal-width
scallop

Equal-width
scallop

Number of stitches

for pattern

Max.zigzag

width

Remarks

1

2

4

6

24

12

24

12

2 +

a

――

3

6

a

{

a

{

Straight stitch

Standard zigzag stitch

2-step zigzag stitch

3-step zigzag stitch

Scallop
(right)

Scallop
(left)

10

――

500

− 8 −

2) Adjusting the feed timing (for A-SR only)

Standard Adjustment

1

2

3

4

5

6

7

Mark on feed
adjustor

8

3

5

5

Engraved marker
dot on bed

Feed rocker
cam

Feed
rocker rod

Alignment of
timing marks

Top suface of
throat plate

Comes down.

A

B

Timing mark on
face plate G

I

Engraved marker line

on thread take-up

Timing mark on
face plate F

− 9 −

Adjustment Procedures Results of Improper Adjustment

A. Procedure by removing the gear box large lid (Standard

adjustment) (A-SR)

1) Remove the gear box large lid. (Refer to 4-(1).)

2) Adjust the engraved marker line on the thread take-up to timing
mark G on the face plate.

3) Align the timing mark on the feed adjustor with the engraved
marker dot on the machine bed.

<<Confirmation of the standard timing>>

4) Timing mark of the feed rocker cam aligns with that of the feed

rocker rod. ... Standard state

Standard assembling adjustment is described below.

5) When they do not align with each other, loosen two setscrews
8 in the hook driving shaft sprocket, and it is necessary to
align the timing mark of the feed rocker cam with that of the
feed rocker rod.

6) Tilt the machine head, remove feed stepping motor connector
1, and remove feed lever spring 2 from the spring bracket.

* When removing feed lever spring 2, perform the work using the

radio pincers or the like.

7) Loosen two setscrews 3 in the feed stepping motor link C and
draw out feed link shaft 4 to the right-hand side.

8) Remove three setscrews 5 in the feed stepping motor unit.

9) When removing the feed stepping motor unit, remove oil pipe
7 from oil pipe guide 6.

10) In the state of 3), loosen two setscrews 8 in the hook driving
shaft sprocket, and adjust the timing mark on the feed rocker
cam to that on the feed rocker rod.

11) When re-assembling the feed stepping motor unit, refer to 3­(3)-2) Adjusting the feed amount.

B. Procedure with the gear box large lid installed (For fine

adjustment) (A-SR)

It is possible to check standard timing without opening the gear

box large lid.

1) Adjust the engraved marker line on the thread take-up to timing
mark F on the face plate.

2) It is the standard timing that the top surface of feed dog almost
aligns with the top surface of throat plate when the feed dog
sinks. However, the height of feed dog is 1.2 mm at the time of
standard delivery.

3) Align the timing mark on the feed adjustor with the engraved
marker dot on the machine bed. (When feed amount is “0”)

4) When they do not align with each other, loosen two setscrews
8 in the hook driving shaft sprocket and adjust the timing.
(For the adjustment procedure, refer to the aforementioned
items 1) through 6).

* Adjusting the feed timing (Common to A. and B.)
By performing the feed timing adjustment, stitch tightness

changes and sewing quality is improved according to the
process.

™ When oil pipe guide 6 is forcibly

drawn, the oil pipe comes off or
damaged. As a result, oil
leakage will be caused.

™ When changing the feed timing

other than the standard one, it
is easy to adjust when the
standard state is made a basis.

* When changing the feed timing

other than the standard one, and
sewing patterns that perform
normal/reverse feed motion (T
stitch, custom pattern, etc.),
needle may bend according to
the feed amount (needle snaps).
In this case, change the feed
timing from the panel and
compensate.

™ Timing mark on the feed adjustor

is the inside mark. (Common to
A. and B.)

− 12 −

2) Adjusting the feed amount (A-SR only)

Standard Adjustment

4

4

4

5

Normal feed amount : 0

Extreme left end
of speed variable
resistor

Straight stitching

1

2

3

1

3

2

Feed stepping motor unit

To smoothly rotate

6

Less
than
700g by
spring
balancer
is the
srandard.

− 13 −

[Feed 0 adjustment]

For the adjustment of feed 0 position, perform fine adjustment of the

direction of rotation of feed adjustor 1.

1) Tilt the machine head and loosen two setscrews 2 in the stepping
motor link C.

2) Adjust feed link shaft 3 to the slippage amount of feed using a slotted
screwdriver and temporarily tighten two setscrews 2 in the stepping
motor link C.

* Feed link shaft 3 consists of eccenric pin.

3) Return the machine head to the home position, turn ON the power, set
the operation panel to straight stitching, and set normal feed amount
to “0”.

* Set the speed variable resistor of operation panel to the extreme left

end and set the sewing speed to 200 rpm.

4) Insert a sheet of paper under the presser foot and depress the pedal
to operate the sewing machine.

At this time, check the needle entry on the paper to check that feed

amount becomes “0”.

5) When feed amount is “0”, tilt the sewing machine head after turning
OFF the power and securely tighten two setscrews 2 in the stepping
motor link C.

After securely tightening the setscrews, check that feed adjustor 1

smoothly moves with the presser foot lifted.

When the feed amount does not become “0”, turn OFF the power

again and repeat the work of steps 1) and 2).

[Feed 0 adjustment] : When feed amount does not become “0” by

adjusting feed link shaft 3 only.

1) Loosen three fixing screws 4 in the feed stepping motor unit and
perform the vertical adjustment of feed stepping motor unit 5.

2) After the adjustment, check that feed adjustor link 6 smoothly moves
with the presser foot lifted.

3) The standard that feed adjustor link 6 smoothly moves is the feed
mechanism torque (less than 700g by the spring balancer) before
setting the feed stepping motor unit. (Be sure to perform the centering
work so that the torque is less than 1,000g.)

[Normal/reverse feed amount control]

1) Input max. feed amount limitation value of normal/reverse feed with
the information of operation panel

* For the information operation, refer to Instruction Manual.
* Normal/reverse feed amount has been factory-set to the standard

adjustment value of JUKI standard delivery gauge (Part No. 40018430
... max. feed amount of normal/reverse stitching is 5 mm).

There are cases where the feed amount varies from the actual input

value in accordance with the material used or kind of gauge. Then
perform the input compensation.

Adjustment Procedures Results of Improper Adjustment

™ Start the work of the feed amount

“0” adjustment after performing 3­(2)-2) Adjusting the feed timing (A­SR only).

™ When there is a torque, one-sided

worn-out of feed link or step-out of
feed stepping motor 5 will be
caused.

™ When there is a torque, one-sided

worn-out of feed link or step-out of
feed stepping motor 5 will be
caused.

Normal feed
small

Reverse feed
large

Normal feed
large

Reverse feed
small

− 56 −

(3) Replacing the timing belt

* The timing belt !1 (22505705) of the highest quality is used, and it is not necessary to replace it

unless a special trouble occurs.

1) Perform removing/installing of the motor in
accordance with the steps of 4. - (2)
Replacing the motor.

<<A-SS(-7), A-SU(-7), A-DS-7, A-DU-7>>

2) Tilt the sewing machine, remove back­magnet setscrews 9 and remove back­magnet !0.

3) Pressing timing belt !1 in the right-hand
direction, turn the timing belt to the front
by fingers, then the timing belt can be
removed.3) Pressing timing belt !1 in the
right-hand direction, turn timing belt !1 to
the front by fingers, then timing belt !1
can be removed.

4) Replace timing belt !1 with a new one and
install again by reversing the above order.

<<A-SR only>>

2) Tilt the sewing machine, remove feed stepping motor connector !2, and remove feed lever spring
!3 from the spring bracket.

* When removing feed lever spring !3, perform the work using a radio pincers or the like.

3) Loosen two setscrews !4 in the stepping motor link C and draw out feed link shaft !5 to the right­hand side.

4) Remove three setscrews !6 in the feed stepping motor unit.

5) Similarly, perform the work as the aforementioned steps 3) and 4) of <<A-SS(7), A-SU(-7), A-DS­7, A-DU-7>>.

Procedures of disassembling/assembling

9

!1

!0

Rubber
cushion

Plunger

!1

!2

!3

!4

!6

!4

!5

!6

!6

− 57 −

6

8

™ When removing/installing the motor, unless the motor is

defective, loosen coupling setscrew 8 without loosening
coupling setscrews 6 and remove the motor with the coupling
installed.

™ When the motor is separated

from the coupling, set the
clearance between the end face
of the motor and that of the
coupling to 0.5 mm when re­assembling.

™ For re-assembling the stepping

motor unit, refer to 3-2)
Adjusting the feed timing.

0.5 mm

Caution in disassembling Caution in assembling

− 70 −

(6) Adjusting/assembling the reverse feed control lever (A-SR only)

1

Procedures of disassembling/assembling

1) Loosen setscrews in the handwheel in the order
of screw No. 2 2 and screw No. 1 1, and
remove the handwheel.

2) Remove four setscrews 4 in the pulley cover
3, and remove pulley cover 3.

3) Temporarily assemble the handwheel again.

(Assembling the handwheel is due to the

workability.)

4) Turn the handwheel and adjust it to UP-stop
position (60 º).

5) Turn the power ON, press switch 5 to display
the information screen.

2

3

4

Engraved
marker line on
the face plate

Engraved marker line on the
thread take-up

5

− 71 −

Caution in disassembling Caution in assembling

™ Be very careful of handling the magnet assembled to the

handwheel.
(Be careful of the damage or collection of dust or the like.)
™ Align the engraved marker line on the thread take-up with that

on the face plate at UP-stop position.

™ Set the handwheel to the position

where the clearance between
pulley cover 3 and the
handwheel is approximately 1
mm, and adjust screw No. 1 1
to the flat position of the motor
shaft. Then tighten the screws
in the order of screw No. 1 1
and screw No. 2 2 in the
direction of rotation of the
handwheel.

™ Make the position of handwheel

flush with the end of the motor
shaft and adjust screw No. 1 1
in the direction of rotation of the
handwheel to the flat position of
of the motor shaft.

− 72 −

6) Press switch 6 to display the sewing common data screen.

7) Press switch 7 from the first screen of sewing common data setting to display the second screen.

8) Press switch 8 for approximately three seconds from the second screen of sewing common data
setting to change to the third screen.

9) Press switch 9 from the third screen of sewing common data setting to change to the reverse feed
control lever adjustment screen.

6

Procedures of disassembling/assembling

7

8

Information screen (Operator level)

9

The first screen of sewing common data setting

The second screen of sewing common data setting

The third screen of sewing common data setting

− 73 −

Caution in disassembling Caution in assembling

− 74 −

10) When reverse feed control lever !0 is turned on in the reverse feed control lever adjustment screen,
the numeric value on the panel changes.

When the numeric value is not within the range of 22 to 32 (standard assembling value) with reverse

feed control lever !0 lifted (off), re-adjust as described in 11) and after.

Procedures of disassembling/assembling

Level meter changes.

!5

!6

Numeric value changes.

off

on

11) Adjusting the reverse feed control lever sensor

Loosen setscrew !2 in the variable resistor link.
Turn the feed lever sensor shaft and adjust

the numeric value of the reverse feed control
lever adjustment screen to 22 to 32 (standard
assembling value) using a flat-blade
screwdriver.

After the adjustment, tighten setscrew !2 in the

variable resistor link.

12) Replacing the reverse feed control lever
sensor

Loosen setscrew !2 in the variable resistor link

and remove variable resistor link !3.

Rmove two setscrews !5 in the feed lever

sensor installing plate and remove feed lever
sensor installing plate !6.

* Replace the sensor with a new feed lever sensor

(Part No. : HD001530000).

After the replacement, perform 11) Adjusting

the reverse feed control lever sensor.

(Caution) It is not possible to move to the other

screen from the reverse feed control
lever adjustment screen. When the
adjustment is completed, turn off
the power.

Reverse feed control lever adjustment screen

!2

!3

− 75 −

Caution in disassembling Caution in assembling

!0

!0

off

on

™ When the numeric value does not change or

E734 occurs, replace the feed lever sensor.

Refer to 12) Replacing the reverse feed control

lever sensor.

* E734 : Feed lever sensor error ... Feed lever

sensor detection trouble
Feed lever sensor : Part No. HD001530000
™ Be sure to perform the check of the function of

the reverse feed control lever in the state that

reverse feed control lever return spring !1 is
hooked.

™ When the power is turned off once in case of

replacing the feed lever sensor or the like, turn

the power on in the state that the flat position of

the feed lever sensor shaft is faced downward.

(E734 occurs.)

™ Assembling position of variable resistor link !3

is the position where it lightly comes in contact

with the machined edge of feed lever link !4.

!1

!4

!3

Flat position of the feed
lever sensor shaft should
be faced downward.

−88 −

(9) Protruding amount of the hook shaft

1. Protruding amount of hook shaft 1 from the end plane of hook shaft front metal 2 is 9 mm.

(Caution) When the protruding amount is excessively large or small, lubrication failure will occur.

So, be careful.

1

2

9mm

(10) Adjusting the feed stepping motor unit (A-SR only)

Feed stepping motor link is treated as the selective part to improve the quality of the feed mechanism.
When replacing the part, be careful of the selection of selective parts.

1. For feed stepping motor connecting shaft 1,
there are four kinds which are different in outer
diameter tolerance of shaft, A to D. Select the shaft
which is of less looseness to the hole of feed
stepping motor link A asm. 2

2. There are grease grooves in the both ends of
bushing of feed stepping motor link A asm 2. and
a grease filling hole inside feed stepping motor
connecting shaft 1. Fill those parts with exclusive
grease (can type part No. 23640204 or tube type
part No. 40006323).

3. Connect feed stepping motor link B 3 and feed
stepping motor link A asm. 2 after making the
looseness in the shaft direction as small as
possible. Assemble feed stepping motor link A
asm. 2 so that it can move by its weight.

4. Do not adjust the position of origin sensor
installing plate setscrew 4 and feed stepping
motor link B 3.

1

2

3

4

Name of part

Feed stepping motor
connecting shaft A

Feed stepping motor
connecting shaft B

Feed stepping motor
connecting shaft C

Feed stepping motor
connecting shaft D

Remarks

There
are
engraved
marks at
the edge
sections.

Part No.

23544109

23544208

23544307

23544802

Outer diameter
tolerance

Maximum

Large

Medium

Small

−90 −

1 Re-sewing switch

2 Needle up/down

compensating switch

3 Screen changeover
switch

4 With/without reverse feed stitch

at sewing start switch

5 With/without reverse feed stitch

at sewing end switch

6 Reset switch

This switch is used to continue sewing from the step on the way
after replacing bobbin thread when bobbin thread has run out
during program stitching step.

This is the switch to perform needle up/down compensating
stitching. (Needle up/down compensating stitching and one stitch
compensating stitching can be changed over with function setting
No. 22.)

This is the switch to change over the screen.

This is the switch to turn ON/OFF automatic reverse feed stitch
at sewing start.

* This switch cannot be used with the sewing machine which is

not provided with automatic reverse feed stitching device.

This is the switch to turn ON/OFF automatic reverse feed stitch
at sewing end.

* This switch cannot be used with the sewing machine which is

not provided with automatic reverse feed stitching device.

This is the switch to make the value of bobbin thread counter or
sewing counter the set value.

1 Re-sewing switch
2 Needle up/down compensating switch
3 Screen changeover switch
4

With/without reverse feed stitch at sewing start switch

5

With/without reverse feed stitch at sewing end switch

6 Reset switch
7 Teaching switch

!5Power display lamp
!6 Smart media cover
!7 Smart media slot

(Smart media inserting opening)
!8 Smart media
(Optional :

Part No. HX005750000)

8 Information switch
9 Edge sensor switch

!0 One-shot stitching switch
!1

With/without automatic thread trimmer switch

!2Thread trimming prohibiting switch
!3Counter value setting switch
!4

Max.speed limitation variable resistor

6. OPERATION PANEL

(1) Names of the respective sections

1

4

!7

3

6

9

!0

!3

!5

!6

25

!4

!1

!2

8

7

!8

−91 −

7 Teaching switch

8 Information switch

9 Feed amount display switch

!0

One-shot stitching switch

!1 With/without automatic
thread trimmer switch

!2 Thread trimming
prohibiting switch

!3 Counter value setting
switch

!4 Max. speed limitation variable

resistor

!5 Power display lamp

!6Smart media cover

!7 Smart media slot

(Smart media inserting opening)

This is the switch to set the setting of the number of stitches with
the value of number of stitches which has been actually sewn.

This is the switch to perform various function settings.

* LZ-2290A-SR only
Normal feed amount and reverse feed amount of the pattern

which is selected at present are displayed.

When this switch is set to effective at the time of program
stitching, the sewing machine automatically operates up to the
specified number of stitches.

When this switch is set to effective at the time of program
stitching, the sewing machine automatically performs thread
trimming when the specified number of stitches has been
completed.

This switch prohibits all thread trimmings.

* This switch cannot be used with the sewing machine which is

not provided with the automatic thread trimming device.

This is the switch to set the value of bobbin thread counter or No.
of pcs. counter.

When moving the resistor in the left direction, max. speed is
limited.

This lamp lights up when the power switch is turned ON.

This is the cover for smart media inserting opening.
To open the cover, place your finger on the notch located on the
side of the cover as shown in the figure and push the cover in the
direction of left slanting rear.
Do not close the cover unless smart media is completely inserted.

To set smart media, insert smart media into smart media slot and
push it until it is almost hidden.
To remove smart media, push it further again and it protrudes to
the position where it can be held between your fingers. Now, draw
it out.
* Be very careful of the inserting direction of smart media.

A : Reverse feed amount
B : Normal feed amount

* The above amounts are not displayed at

the time of cycle stitching.

A B

−92 −

(2) Information

Setting and checking of various data can be performed with the information.
For the information, there are the operator level and the maintenance personnel level.

[Operator level]

1. Turn ON the power. When the needle bar is not in the UP position, turn the handwheel to bring the
needle bar to its UP position.

2. Press switch 1 to display the information screen.

3. Press switches 3, 5 corresponding to the various functions.

[Maintenance personnel level]

1. Turn ON the power. When the needle bar is not in the UP position, turn the handwheel to bring the
needle bar to its UP position.

2. Press switch 1 for approximately three seconds to display the information screen.

3. Press switches 2 through 8 corresponding to the various functions.

Information screen (Maintenance personnel level)

3 :Sewing common data
5 : Sewing management

information

2 : Ver display
3 :Sewing common data
4 : Function setting
5 : Sewing management

information

6 : Communication mode
7 : Hook adjusting mode
8 : Smart media format

Information screen (Operator level)

1

1

3

5

23 4

567

8

−93 −

1) Ver display

Software version of each CPU is displayed.
Press switch 2 in the information screen (maintenance personnel level).

Ver display screen

Explanation of display

RV L
01- 01 01 00

Others
Level
Version
Revision
Kind of CPU

Panel software

Main software

Servo motor software

Excluding LZ-2290A-SR

LZ-2290A-SR only

Explanation of display

RV L
00- 00 00 00

Others
Level
Version
Revision
Kind of CPU

Panel software

Main software

Servo motor software

Feed motor software

−94 −

2) Sewing common data

1. Press switch 3 in the information screen.

The second screen of sewing common data setting

2. Set the items below in the first screen.
2 : Limiting procedure of max. zigzag width limitation

For the limiting procedure of max. zigzag width
limitation, there are two settings below.

3 : Max.zigzag width limitation value

* Display varies according to the procedure selected in 2.

1) When the center is set in 2 :
Max.zigzag width limitation value (center)

2) When the left/right is set in 2 :
Max.zigzag width limitation value (right)

Max.zigzag width limitation value (left)

5 : Reverse feed limitation value (LZ-2290A-SR only)

Reverse feed limitation value is set with “+”/”-” of
switch 5. In case of the example, set it to -4.0.

6 : Normal feed limitation value (LZ-2290A-SR only)

Normal feed limitation value is set with “+”/”-” of switch

6. In case of the example, set it to 4.0.

8 : Second screen of sewing common data setting is

displayed.

3. Set the items below in the second screen.

4: Reference of stitch base line

For the reference of stitch base line,
there are three settings below.

1) Center

2) Right

3) Left

2: Mirror function setting

Mirror inversion means the function that the reverse pattern stitching is performed after pressing the
mirror inversion switch during temporary stop of sewing.
The sewing patterns that the mirror inversion is possible are scallop, custom, continuous stitching and
cycle stitching.
For the mirror inversion, there are two settings below.

1) Center

2) Left/right

The first screen of sewing common data setting

234

23 4

56

56

**

*

*

8

8

−96 −

4. Press switch !6 for approximately three seconds in the second screen of sewing common data
setting.

The third screen of sewing common data setting

2 : Change of zigzag timing

Zigzag timing can be changed.
Needle sway can be prevented by delaying timing when sewing heavy-weight materials or the like.

1. Fast : Standard setting

2. Slow : Timing is delayed by approximately 30fl in terms of the standard.
However, to delay timing, conditions below are necessary.

1. When the number of rotation is set to less than 4,000 rpm with the function setting No. 96, Max.
number of rotation setting.

2. When the travelling distance of 1 stitch is less than 4 mm.
In case of more than 4 mm, needle may travel while it is stuck on the cloth.
In case the distance is more than 4 mm and zigzag motion is performed, do not set this function.

3 : Change of feed timing (LZ-2290A-SR only)
When adjusting the heigt of feed dog or hook driving shaft sprocket timing, feed dog is fed while needle

is stuck on the cloth according to the feed pitch amount. As a result, needle bend will be caused.
In this case, perform the adjustment of the phase of feed timing.
Setting range : -50 º to + 50 º in terms of the standard timing

7 : Alternate changeover of stitch base line unit between 0.1 mm and 0.2 mm

The unit of change of stitch base line position can be changed over to 0.1 mm unit or 0.2 mm unit.

1. 0.1 mm unit : Standard setting

2. 0.2 mm unit : Panel setting is 0.1 mm unit, but actually the position travels every 0.2 mm.

The second screen of sewing common data setting

23 4

5

6

!6

*

*

27

3

8

−97 −

5. Press switch 8 in the third screen of sewing common data setting.

Reverse feed control lever adjustment screen (LZ-2290A-SR only)

1. Set the reverse feed control lever to the free state and adjust so that the numeric value is among
22 to 33.

(Caution) When the adjustment is completed, turn the power OFF since it is not possible to move

from the reverse feed control lever adjustment screen to the other screen.

* For the detailed adjusting procedure, refer to 4.-(6) Adjusting/assembling the reverse feed control lever

(A-SR only)

3) Sewing management information

For the sewing management information, there are the operator level and the maintenance personnel level.
[Maintenance personnel level]
Press switch 5 in the information screen.

[Maintenance personnel level]
Press switch 5 for approximately three seconds in the information screen.
Pictograph on the left end of the sewing management information is shown in reverse video.

Sewing management information screen (Maintenance personnel level)

Error record display 6

Maintenance management

function 4

Existing value of the lever is displayed.

− 101 −

5) Vector form data (Custom pattern data)

1. The custom pattern created with the panel can be stored as the vector form data.

2. The same custom pattern can be used with other sewing machines by downloading the vector form data
which has been stored.

3. The vector form data created with PM-1 can be can be downloaded as the custom pattern.

4. The vector form data which has been stored can be edited with PM-1.

Communication screen (Download of vector form)

Folder structure of vector form (* .VDT) file in the smart media

Upload : Uploading to the smart media is written in the folder of "VDATA".

In case there is no folder, the folder of "VDATA" is automatically created.

Download : Downloading from the smart media is read from the folder of "VDATA".

When creating the pattern with PM-1, store it in the folder of "VDATA".
1 Create folder "VDATA" in the smart media.
(It is not necessary to create the folder when it already exists.)
2 Copy the file (extension VDT).

Smart media

PROG

* SC915 (Excluding LZ-2290A-SR)
* SC916 (LZ-2290A-SR only)

VDATA

VD00001.VDT
VD00099.VDT

− 102 −

Upload : Uploading to the smart media is written in the folder of "SC915" or "SC916".

In case there is no folder, the folder of "SC915" or "SC916" is automatically created.
Download : Downloading from the smart media is read from the folder of "SC915" or "SC916".

Store the copy from other media or the like in the folder of "SC915" or "SC916".
1 Create folder "SC915" or "SC916" in the smart media.
(It is not necessary to create the folder when it already exists.)
2 Copy the file (extension EPD).

6) Parameter form data (Condensation custom pattern)

1. The condensation custom pattern created with the panel can be stored as the parameter form data.

2. The same condensation custom pattern can be used with other sewing machines by downloading the

parameter form data which has been stored.

Communication screen (Download of parameter form)

Folder structure of parameter form (* .EPD) file in the smart media

Smart media

PROG

* SC915 (Excluding LZ-2290A-SR)
* SC916 (LZ-2290A-SR only)

VDATA

SC00001.EPD
SC00001.MSP

− 103 −

7) All sewing machine data

1. Data such as sewing setting data, adjustment data, etc. which are memorized in the sewing machine can be

stored in one package.

2. It is possible to download the all sewing machine data to the other sewing machines to make the same

setting.

Communication screen (Download of all sewing machine data)

Folder structure of all sewing machine data (* .MSP) file in the smart media

Reference : When downloading the all sewing machine data, it is necessary that the file and the Ver of the

sewing machine have to agree with each other. An error occurs when the file of different Ver is
downloaded.

(Caution) It is not possible to store and copy the function setting of the servo motor.

Smart media

PROG

* SC915 (Excluding LZ-2290A-SR)
* SC916 (LZ-2290A-SR only)

VDATA

SC00001.EPD
SC00001.MSP

Upload : Uploading to the smart media is written in the folder of "SC915" or "SC916".

In case there is no folder, the folder of "SC915" or "SC916" is automatically created.

Download : Downloading from the smart media is read from the folder of "SC915" or "SC916".

Store the copy from other media or the like in the folder of "SC915" or "SC916".
1 Create folder "SC915" or "SC916" in the smart media.
(It is not necessary to create the folder when it already exists.)
2 Copy the file (extension MSP).

− 104 −

Upload : Downloading from the smart media is read from the folder of "PROG\SC915" or "SC916".
Download : Store the copy from other media or the like in the folder of "PROG\SC915" or "SC916".

1 Create folder "PROG" in the smart media.
2 Create folder "SC915" or "SC916" in the PROG folder.

(It is not necessary to create the folder when it already exists.)

3 Copy the program file (extension PRG).

8) Program data

1. When the change of software occurs in the future due to Ver-up or the like, rewriting of the program can be

performed. Rewriting of the program is performed with each CPU.

Communication screen (Download of IP-100 program data)

Folder structure of program (* .PRG) file in the smart media

Smart media

PROG

* SC915 (Excluding LZ-2290A-SR)
* SC916 (LZ-2290A-SR only)

VDATA

IP010101.PRG
MA010101.PRG

MT010101.PRG

* SC915
* SC916

BT010101.PRG (SC916 only)

− 123 −

(2) Error code list (Error display in panel)

There are the following error codes in this device. These error codes interlock (or limit function) and inform the
problem so that the problem is not enlarged when any problem is discovered. When you request our service,
please confirm the error codes.

UP position detection error when turn-

ing ON the power

Smart media cover open

Disconnection of synchronizer connector

Synchronizer lower position sensor failure

Synchronizer upper position sensor failure

Overload of motor

Machine head connector failure

Smart media not inserted

Read error

Write error

Write protect

Format error

External media capacity over

File size over

Pattern data size over

File compatibility error

Travel limit over

Operation error

Fall detection switch failure

Feed pitch error of condensation sec-

tion

Reverse feed pitch error of normal

sewing section

Normal feed pitch error of normal sew-

ing section

•When needle position is not UP position at the time

of turning ON the power.

•Lid of smart media slot is open.

•When position detection signal is not inputted from

the sewing machine head synchronizer.

•When the synchronizer has broken.

•When the machine head is locked.

•When sewing extra-heavy material beyond the

guarantee of the machine head.

•When the motor does not run.

•

When the machine head connector is not properly read.

•Smart media is not inserted.

•Data read from smart media is not possible.

•Data write to smart media is not possible.

•Smart media is in write prohibition state.

•Formatting cannot be performed.

•Media capacity of smart media is short.

•File is too big.

•Number of stitches and data amount which can be

handled with device are over.

•There is no file compatibility.

•Sewing data has exceeded sewing possible area.

•Operation of sewing data cannot be performed.

•When fall detection switch is inputted in the state

that the power is turned ON.

•

When

feed pitch of condensation section exceeds

the range of feed.

•

When reverse

feed pitch of normal sewing section

exceeds the range of feed.

•

When normal

feed pitch of normal sewing section

exceeds the range of feed.

No.

Description of error detected

−

−

003

004

005

007

008

011

012

013

014

015

016

019

024

032

040

042

302

487

488

489

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

7 times flash

7 times flash

7 times flash

Cause

Item to be checked or corrective measure

Mirror LED flash

Pictograph display

• Set to UP position by turning handwheel by

hand.

• Connect synchronizer connector.

• Close the lid.

• Check the synchronizer connector (CN30) for

loose connection and disconnection.

• Check whether the synchronizer cord has

broken since the cord is caught in the machine

head or the like.

• Check whether the thread has been entangled

in the motor pulley.

• Check the motor output connector (4P) for loose

connection and disconnection.

• Check the machine head connector (CN54) for

loose connection and disconnection.

• Turn OFF the power.

•Turn OFF the power.

•Turn OFF the power.

• Turn OFF the power.

• Turn OFF the power.

•Turn OFF the power.

• Turn OFF the power.

•Turn OFF the power.

•Turn OFF the power.

•Turn OFF the power.

•Turn OFF the power.

• Check whether the machine head is tilted

without turning OFF the power switch (sewing

machine operation is prohibited for safety sake).

•

Check whether the fall detection switch cord is caught

in the sewing machine or the like and has broken.

• Check whether the fall detection switch lever is

caught in something.

• Re-enter data after reset operation.

• Set the feed amount of condensation section

within the range of limitation.

• Re-enter data after reset operation.

• Set the reverse feed amount of normal sewing

section within the range of limitation.

• Re-enter data after reset operation.

• Set the normal feed amount of normal sewing

section within the range of limitation.

− 124 −

•Re-enter data after reset operation.

•Set pattern No. and number of stitches.

• Re-enter data after reset operation.

• Correct data of pattern which becomes error.

• Reset operation

• In case of deletion, release the use of pattern

sewing, continuous stitching or cycle stitching

used, and perform again deletion.

• Re-enter data after reset operation.

• Set zigzag width of condensation custom pattern

within max. zigzag width limitation.

• Re-enter data after reset operation.

• Set the position of stitch base line within max.

zigzag width limitation.

• When condensation custom is selected, check

and correct the position of condensation.

• Re-enter data after reset operation.

• Set the position of stitch base line within max.

zigzag width limitation.

• Turn OFF the power.

• Connect the proper panel.

• Turn OFF the power.

• Consist system versions with each other.

•Check the motor signal connector (CN38) for

loose connection and disconnection.

•

Check whether the motor signal cord has broken since

the cord is caught in the machine head or the like.broken

since the cord is caught in the machine head or the like.

•Turn OFF the power.

• Turn OFF the power.

• Disconnection of relay cable of reverse feed

control lever sensor.

• Trouble of reverse feed control lever sensor.

•Check whether the solenoid is short-circuited.

•

Check whether the applied power voltage is higher

than the rated voltage + (plus) 10% or more.

•Check whether 100V/200V changeover

connector is set by mistake.

In the above cases, POWER circuit board has broken.

490

491

492

493

498

499

703

704

730

731

733

734

810

811

Pattern setting error of continuous

stitching and cycle stitching

Cycle stitching pattern error

Data deletion impossible

Condensation custom pattern width

error

Position of stitch base line error

Max. zigzag width error

Connection of panel which is not sup-

posed

Inconsistency of system versions

Encoder failure

Motor hole sensor failure

Reverse rotation of main shaft motor

Reverse feed control lever sensor

erroe

Solenoid short-circuit

Overvoltage

•

When pattern No. is not set to continuous stitching.

•

When the number of stitches of 1st step of continuous stitching is

"0".

• When pattern No. is not set to cycle stitching.

• When pattern to be used in cycle stitching becomes

error.

• When data to be deleted is used in pattern sewing,

continuous stitching or cycle stitching.

• When zigzag width of condensation custom pattern

is larger than max. zigzag width limitation.

• When the set zigzag width is within max. zigzag

width limitation, but zigzag position exceeds max.

zigzag width limitation according to the position of

stitch base line.

• When specified zigzag width is within max. zigzag

width limitation, but zigzag position exceeds max.

zigzag width limitation according to the position of

stitch base line.

• When panel connected to the sewing machine is

the kind which is not supposed.

• When system versions are inconsistent.

• When the motor signal is not properly inputted.

• State that the sewing machine is rotating in the

different direction from the normal rotating direc-

tion at 500 rpm or more continues 40 times or more

while motor is running (excluding holding of needle

position).

•

Abnormality of reverse feed control lever sensor

detection.

•

When the short-circuited solenoid is desired to be driven.

• When voltage upper than guaranteed one is

inputted.

• When 200V is inputted for 100V setting.

7 times flash

7 times flash

−

7 times flash

7 times flash

7 times flash

−

−

−

−

−

−

−

No.

Description of error detected

Cause

Item to be checked or corrective measure

Mirror LED flash

Pictograph display

− 125 −

Low voltage

85V low voltage error

Zigzag drive origin error

Operation panel transmission failure

Communication failure between NAIN

and main shaft control CPU

Communication failure between panel

and personal computer

Overheat error

Main shaft motor control is impossible.

Motor driver failure

Feed drive orign error

Bird's nest sequence error

Main shaft EEPROM failure

MAIN EEPROM failure

FROM failure

Servo motor RAM error

Main RAM error

• When voltage lower than guaranteed one is

inputted.

• When 100V is inputted for 200V setting.

•When 85V detection sensor judges that voltage is

low.

• Origin sensor of zigzag drive motor is not detected.

• Disconnection of operation panel cord

• Operation panel has broken.

• When main shaft fails to communicate with MAIN.

• When MAIN fails to communicate with main shaft.

• Panel fails to communicate with personal computer.

•When temperature of inside of electrical box has

abnormally risen.

• When main shaft motor cannot be controlled.

• Motor driver has broken.

• Orign sensor of feed drive moter is not detected.

• Bird's nest prevention sequence is not completed.

• Writing is not completed even after the lapse of 10

[ms] or more.

• Writing is not completed even after the lapse of 10

[ms] or more.

• Deletion or writing of FROM cannot be performed

at the time of downloading program.

• RAM check error when the power is turned ON.

• RAM check error when the power is turned ON.

813

838

907

915

916

917

919

922

924

939

940

942

943

948

−−

−−

•Check whether the votage is lower than the rated

voltagw - (minus) 10% or less.

•Check whether 100V/200V changeover

connector is set by mistake.

•Turn OFF the power.

• Turn OFF the power.

• Trouble of origin sensor of zigzag drive motor

•

Disconnection of relay cable of zigzag drive motor

• Trouble of zigzag drive circuit

•Check the operation panel connector (CN34)

for loose connection and disconnection.

•Check whether the operation panel cord has

broken since the cord is caught in the machine

head or the like.

•Turn OFF the power.

Turn OFF the power.

•Turn OFF the power.

•Turn OFF the power.

•Cleaning of fan filter

•Removal of cause of temperature rise of

electrical box

•Turn OFF the power.

• Turn OFF the power.

• Trouble of origin sensor of feed drive motor.

• Disconnection of relay cable of feed drive motor.

• Trouble of feed drive circuit.

•Turn OFF the power.

•Turn OFF the power.

•Turn OFF the power.

•Turn OFF the power.

•Turn OFF the power.

•Turn OFF the power.

−

−

−

4 times flash

−

−

−

−

−

−

−

−

−

−

LED flash

(Caution) 1

LED is lit up.

No.

Description of error detected

Cause

Item to be checked or corrective measure

Mirror LED flash

Pictograph display

(Caution) 1 Flash of LD 2 on the circuit board

− 142 −

15. Display is different from the feed display

of operation panel value even when the

reverse feed control lever is operated.

16. “Snap”, sound of needle bend, occurs or

needle is apt to be broken.

17. Feed amount input value on the

operation panel is different from the actual

sewing value.

18. Shape of custom pattern on the operation

panel is different from the actual sewing

value.

15-1) Position of the reverse feed control lever

sensor is improper.

15-2) Reverse feed control lever return spring

is disconnected.

16-1) Feed timing in terms of standard timing

is changed.

17-1) The value is changed from the value at

the time of delivery from the factory.

18-1) The state is changed from that at the

time of delivery from the factory.

18-2) The pattern is a pattern that frequently

performs normal/reverse feed stitching

repetition motion.

1-A) Height of feed dog is too high.

1-B) Feed timing in terms of standard timing

is changed.

Perform adjustment of the position of reverse feed control lever sensor.

Refer to 4-(6)-11) Adjusting the reverse feed control lever sensor.

Install the reverse feed control lever return spring.

Refer to 4-(6)-11) Adjusting the reverse feed control lever sensor.

Lower the height of feed dog. (Return the mechanical adjustment value to the standard.)

Refer to 3-(1) Height and inclination of the feed dog.

Change the feed timing on the operation panel.

Adjust the feed timing. (Return the mechanical adjustment value to the standard.) Refer to 3-

(2)-2) Adjusting the feed timing.

Change the feed timing on the operation panel.

Return to the standard state or compensate and input the panel input value adjusting to the

actual sewing.

(Actual sewing may differ from the input value due to shape of gauge, height of feed dog,

presser pressure, slide characteristic of material, etc.)

Compensate and input the panel input value adjusting to the actual sewing. (Actual sewing

may differ from the input value due to shape of gauge, height of feed dog, presser pressure,

slide characteristic of material, etc.)

Compensate and input the panel input value adjusting to the actual sewing and decrease the

sewing speed. (Standard : up to max. 2,500 rpm)

(In case of the shape that frequently performs normal/reverse feed repetition motion, as the

sewing speed is increased, motion-loss is increased, and the pattern shape may be broken.

LZ-2290A-SR (Quick reverse type only)

Trouble Ca1use 1 Cause 2 Corrective measure and adjusting procedure

− 143 −

19. T stitch pattern is dirty.

20. Material falls (is caught in).

21. Step-out of motor occurs.

19-1) “0” position is slipped.

19-2) Stitch tightness is not good.

20-1) Clearance between throat plate and

feed dog is too large.

21-1) Assembling torque of feed mechanism

is too heavy.

1-A) State of feed dog is different from the

standard state.

Make it the standard state.

Perform compensation and input of feed amount “0”.

(Feed amount may be different from the input value due to the slide characteristic of material

or the like.) ... Refer to the Instruction Manual.

Adjust the feed amount. (Return the mechanical adjustment value to the standard.)

Refer to 3-(1)-2) Adjusting the feed amount.

Replace the thread tension with 2-disk type thread tension of lockstitch type.

Part No. : 40017095

Replace the feed dog with that adjusted to the feed pitch used. (Make minimum the clearance

between throat plate and feed dog.) ... Standard delivery gauge is for 5 mm feed.

Re-adjust the feed mechanism torque at the time of assembling the feed stepping motor unit.

Refer to 3-(3)-2) Adjusting the feed amount.

Trouble Ca1use 1 Cause 2 Corrective measure and adjusting procedure

− 146 −

(2) Block diagram B (for SC-916)

1-PHASE 200V

3-PHASE 200V/
1-PHASE 100V

NEW MINI

ELCO

BOX FAN

NEW MINI

NEW MINI

RED

BLACK

ELCO

ELCO

NEW MINI

NEW MINI

NEW MINI

YELLOW

NEW MINI

MACHINE MAIN
SHAFT
AC SERVO
MOTOR

ENCODER

POWER SW

SYNCHRO­NIZER

PEDAL

STANDING
PEDAL

NEW MINI

NEW MINI

ELCO

NEW MINI

NEW MINI

NEW MINI

ELCO

ELCO

ELCO

NEW MINI

NEW MINI

BLACK

YELLOW

PRESSER LIFTER
SOLENOID

THREAD
DRAW-OUT

5-PHASE STEPPING
MOTOR ORIGIN
SENSOR

ELCO

BT SWITCH

MIRROR SWITCH

SP SWITCH

WIPER SOLENOID
TENSION RELEASE SOLENOID

MON LED

THREAD TRIMMING SOLENOID

SAFETY SWITCH

REGENERATIVE
RESISTANCE

GREEN

MOTOR DRIVE

SIGNAL

ENCODER
SIGNAL

SC-916 / IP-100D

3 P

3 P

2 P

BOX INTERNAL
FAN

HEAD FAN

M85405900A0

40016435

40005979

2 P

2 P

2 P

ELCO

CN125

40005988

NEW MINI

2 P

2 P

10 P

4 P

8 P

24V

33V

CN14

CN15

CN11
BLACK

CN23

CN24

CN26

CN25
RED

CN12 T16-1,2,3

CN29

CN22

CN13

CN10

CN21 CN38 CN28

T15

T14

4 P

9 P

40005971

FG

FG

KM000000460

5 P

5 P 3 P

AMP

40005987

40005970

+5V, +12V

40005972

+33V, +24V
40005986

+85V

40005985

HEAD
DISCRIMINATION

30 P

8 P

4 P

4 P

4 P

12 P

7 P

+85V, +24V, +12V, +5V

40015544

PWR PCB

FLT PCB

BTPM PCB

IP-100(D)

CTL PCB

CN30

CN36

CN32

CN31

CN45

CN41

CN44

ELCO

RED

CN58

PC I/F CT

5 P

5 P

5 P

13 P

8 P

CN57

PC I/F LZ

CN59

PC I/F BT

CN54

CN53

CN46
BLUE

CN51

CN40

CN52

CN56

CN49

JTAG

OPTION

40016451

CN61 CN34

16 P

6 P

10 P

2 P

2 P

12 P

6 P

BLUE

40006012/13

CN202

CN201

3 P

3 P

THREAD HOLD
SOLENOID VALVE

SUCTION SOLENOID
VALVE

23530066

26 P

CP-IT PANEL

CN106

26 P

40016689

40008168

SMART
MEDIA

SW CABLE

HX005750000 (WITHOUT
SOFTWARE)

OPTIONAL

4P M90175800A0
3P M90245800A0
CE 40005390
DOMESTIC 100V M90355800A0

40013881

8 P

CN76

JTAG

CN74CN71

CN72

CN73
BLACK

9 P

ELCO

BLACK

4 P

8 P

8 P

8 P

40017098

40011831

FEED 5-P
STEPPING
MOTOR

BT LEVER
POSITION
SENSOR

ORIGIN
SENSOR

40000046

40000056

CN3

CN2

CN1

6 P

AMP

EARTH CORD M90345800A0

4P 40005975
3P 40005976
CE 40005977

40006021 REV.3 ~