Bernina aurora 430 User manual

aurora 430-440 QE
Service Manual
© Fritz Gegauf Ltd., Steckborn/Switzerland
4. Version A


1
Safety Regulations
Caution!
All electrical and electronic components operate at dangerous voltages. Remove the
mains plug before making any adjustments to the machine. Wait about 30 seconds
after removing the plug (capacitor discharge).
This service manual is intended to help with minor repairs and adjustments.
The instructions do not claim to be complete or comprehensive. The manual does not provide
guidance for complete assembly or disassembly.
IMPORTANT:
To enable the work described to be performed correctly, the sewing and embroidery
computer must be in good mechanical and electrical condition (running smoothly,
properly oiled and all leads connected)! When adjustments are carried out in the
correct order, the sewing/embroidery computer will function without problem.
It is important that only devices approved and distributed by BERNINA® are connected to the
sewing/embroidery computer ports.
When servicing, always use genuine parts and accessories, either those delivered with the
machine or purchased afterwards.
These are the following:
• Mains cable
• Foot control unit
• Buttonhole foot
• Presser foot 1
• Bobbin case with bobbin
• Other accessories
• BSR Foot (if applicable)
The Service Manual and Instructions are protected by copyright laws. These documents are
delivered exclusively to the recipient. It is forbidden to copy, distribute, forward, publish or to
reproduce them in any form without the express prior consent of Fritz Gegauf AG, Bernina,
Steckborn, Switzerland. It is also forbidden to record this Service Manual and Instructions on
any retrieval system, or to translate it, or parts of it, into any human or computer-related
language of any kind, whether electronically, mechanically, magnetically, or otherwise.
Furthermore, it is prohibited to disclose the Service Manual and Instructions to third parties
without the express written approval of FGAG, Bernina, Steckborn, Switzerland.
This Manual is subject to revisions without notice. The recipient is responsible for updating the
information provided by FGAG, Bernina, Steckborn, Switzerland.
Masthead
Authors: P. Kenyon, V. Häseler
Layout/typesetting: Erika Vollenweider
Print: Heer Druck AG, Sulgen
Masthead
Authors: P. Kenyon, V. Häseler
Layout/typesetting: Erika Czibulya
Print: Heer Druck AG, Sulgen

2
Safety Regulations 1
Contents 2
Technical Data 3
Service Panel 4
Tools Needed 5
Electronic:
Electrostatic Discharge (ESD) 6
Block Diagram 7
PCB's, Plugs and cables 8/9
Ribbon cable function 9
General functions of the PCB's 10
RET-Print 10
P-Print 10
L-Print (Universal) 11
S-Print 11
Diagnostic Instructions 12
Warning of dangerous voltages 13
Service Program
Panel Layout 14
Key Functions 15
Starting and exiting the basic program 15
Navigation 15
Service Program Tests (SP) 16
SP 0.0 (sensor test) 16
SP 0.1 (voltage test) 16
Meaning and functions of LED's 17
SP 0.2 (foot control) 18
SP 0.3 (SSU Start Stop Unit) 18
SP 0.4 (presser foot pressure) 19
SP 0.5 (presser foot lifter) 19
SP 0.6 (feed-dog drop) 20
SP 0.7 (winder switch) 20
SP 0.8 (upper thread indicator) 21
SP 0.9 (buttonhole sensor) 22
SP 0.10 (P-Print) 23
SP 1.x (pattern function) 24
SP 1.1 (zig-zag and straight stitch) 24
SP 1.2 (honeycomb stitch) 24
SP 1.3 (darning stitch) 24
SP 1.4 (Buttonhole) 24
SP 1.5 (keyhole buttonhole) 24
SP 2.x (front cover) 25
SP 2.1 (screen) 25
SP 2.2 (S-Print related keys) 25
SP 2.3 (RET-Print related keys) 25
SP 2.4 (signal tone) 26
SP 3.x (stepping motors) 27
SP 3.1 (stepping motor stitch length) 27
SP 3.2 (stepping motor stitch width) 28
SP 3.3 (all stepping motors) 29
SP 3.4 (stepping motors in pinning
position) 30
SP 3.5 (stitch width test) 31
SP 4.x (stitch counter) 32
SP 4.1 (total number of stitches) 32
SP 4.2 (number of stitches in sewing
mode) 32
SP 4.3 (number of stitches in embroidery
mode) 32
SP 4.4 (number of stitches in BSR mode) 32
SP 5.x (hour counter) 32
SP 5.1 (time power on) 32
SP 5.2 (time stand by) 32
SP 5.3 (time working) 32
SP 5.4 (time sewing) 32
SP 5.5 (time embroidery) 32
SP 5.6 (time BSR) 32
SP 6.x Speed 33
SP 6.1 (calibration of maximum speed) 33
SP 6.2 (testing standard speed) 34
SP 6.3 (testing standard speed of SSU) 34
SP 7.x (Information) 35
SP 7.1 (software version) 35
SP 7.2 (configuration) 35
SP 7.3 (serial number) 36
SP 7.4 (production date) 36
SP 8.x (calibration of balance) 37
SP 8.1 (zero feed) 37
SP 8.2 (balance using "9") 38
SP 8.3 (balance using "leaf" pattern) 39
SP 8.4 (buttonhole adjustment) 39
SP 9.x (motors) 40
SP 9.1 (continuous running in
zig-zag stitch) 40
SP 9.2 (continuous running in
honeycomb stitch) 40
SP 9.2 (winder motor) 41
SP 10.x (BSR) 42
SP 10.1 (BSR sensors) 42
SP 10.2 (Function of BSR-foot) 42
SP 10.3 (BSR foot chassis number) 43
SP 10.4 (BSR foot production date) 43
SP 10.5 (BSR software version) 44
SP 10.6 (BSR boot loader version) 44
SP 10.7 (BSR info. On calibration) 45
SP 12.x (Maintenance & Service
information) 46
SP 12.1 (Maintenance counter) 46
SP 12.2 (resetting the maintenance
counter) 46
SP 12.3 (service counter) 46
SP 12.4 (resetting the service counter) 46
Cleaning interval 47
Servicing interval 47
Visual, functional, sewing and mechanical
checks 48
Notes on electrostatic discharge 49
Removing covers 50
Cleaning 51
Replacing: 52
- Thread pre-tensioner 52
- Vertical spool pin 52
- Horizontal spool pin 53
- Carrying handle 53
- Magnifier holder and thread cutter 54
- S-Print, key pad, front cover, RET-Print
and plug cover 54
- P-Print 55
- L-Print 56
- CFL sewing light 57
- Presser foot lifter sensor 57
- Buttonhole sensor 58
- Main motor (only complete) 58
- Stitch width stepping motor 59
- Stitch length stepping motor and
crankshaft 60
- Foot pressure sensor 61
- Bobbin winder motor 61
- Base shaft 62
- Hook race ring 63
- Thread tension unit 64
- Thread take-up lever 65
- Main shaft and synchronizing disc 66
Adjustments: 67
- Tensioning drive belt 67
- Tensioning the base shaft belt 67
- Bobbin winder device 68
- Position of head plate 68
- Presser foot fixation 69
- Presser foot height 69
- Darning foot height 70
- Position of hook driver in the hook race 70
- Needle/Hook distance 71
- Needle position in straight stitch 71
- Position of synchronizing disc 72
- Position of feed-dog in the stitch plate 72
- Feed-dog height 73
- Thread passage play 74
- Thread guide plate 74
- Feed-dog synchronization (timing) 74
- Hook setting loop lift 75
- Position needle/hook point 76
- Needle height 77
- Basic balance settings 78
- Basic knee lifter settings (FHS) 79
- Basic settings of lower thread tension 79
- Basic setting of upper thread tension 80
- Adjusting the upper thread tension
using a weight 80
- Thread tension release lever 81
- Thread regulator spring 81
Sewing-off 82
External cleaning 82
Content

3
Technical Data BERNINA aurora 430 / 440QE
430 / 440QE
5
0,05
5
5,5
0,185
11
5
1
yes
yes
65/63
99/216
1 / 3
164/279
yes
yes
in Display
yes
Electronical
yes
yes
yes (double click
reverse button)
yes (30)
yes
yes
BERNINA
yes
yes
Rubber pad
L.C.D.
60 x 40 (2.4 x 1.5)
Graphical
yes
Partially
yes
yes
yes
Features - Stitch programmes
Max. stitch length forward in mm
Increment in mm
Max. stitch length reverse in mm
Stitch width in mm
Approx. increment in mm
Needle positions
Total number of buttonhole types
Total number of darning programmes
Functions: Stitch counter - darning
Functions: Buttonhole length measuring
system
Total number of utility stitches
Total number of decorative stitches
Alphabets incl. numericals, symbols and
characters
Total number of stitch programmes
Functions
Automatic basic settings
Display of recommended optimum stitch
settings
Display of selected stitch/functions
Clear (clr) button
Balance
Pattern end
Horizontal mirroring
Permanent reverse sewing
Memory
Permanent save
Hopper mechanism
Presser foot fixation
Adjustable presser foot pressure
Free Hand System (FHS) presser foot lifter
Operating controls
Buttons
Screen
Size in mm (inch)
Display
Screen backlight
Direct stitch/function selection
Stitch width bar display
Stitch length bar display
Integrated service programme
Drive/power unit
Power max.
Motor
Sewing speed in s.p.m.
Needle stop
Needle stop down via foot control
Roll-up foot control cable
Main power switch
Mechanical data / housing
Diametral capacity in mm
(inch)
Overall length in mm (inch)
Overall width in mm (inch)
Overall height in mm (inch)
Sewing light
Presser foot height
Drop feed-dog
FHS-droppable feed-dog
Hook system
Needle system
Adjusting needle
Weight (without accessories)
BSR
Embroidery
aurora 430 /440 QE
100W
DC/65W/30V
100-900
Up / Down
yes
yes
yes
190 x 110 (260)
(7.5 x 4.3 (10.2))
385 (15)
175 (7)
308 (12)
CFL
7,5 mm
yes
yes
BERNINA-CB
130/705H
130/705H TCN
ca. 9,7 kg (ca. 21 Ibs)
no / yes
optional

4
13
15 16
14
Y
Start / Stop
17 18 19
OK ESC
Service Start
20 21
22 23
24 25 26
292827
-/+-+
-
-
+
+
123
456
78 9
10 11 12
e
i
d
b
c
g
f
a
h
Needle Positions 1 to 11
p
o
q
jklmn
Aurora 430 /440 031 216.50.00
13
15 16
14
Y
Start / Stop
17 18 19
OK ESC
Service Start
20 21
22 23
24 25 26
292827
-/+-+
-
-
+
+
123
456
78 9
10 11 12
e
i
d
b
c
g
f
a
h
Needle Positions 1 to 11
p
o
q
jklmn
Aurora 430 /440 031 216.50.00Aurora 430 /440 031 216.50.00
Service panel

5
Tools
Required tools and gauges:
Commercially available, not available from Bernina: TORX screw driver sizes. 6, 8, 9, 10, 12, 15, 20, 25
Circlip mounting tool Spring mounting tool
Rectifying tool for
bobbin case spring
398 097.030
spring balance
006.038.50.00
Eccentric key
001 361.70.00
(Driver/hook play)
001 357.70.00
Lower thread tension
001 358.70.00
Upper thread tension
398 080.040
Pinning tool
(Loop lift)
030 349.70.00
Pinning tool
(Stepping motor/drive crank)
001 356.50.00
Pinning tool
(Stepping motor/drive crank)
002 733.50.00
Hook race gauge
006 765.71.00
Eccentric key
031 563.50.00
Presser foot height gauge
6.0mm/8.5mm
(Driver/hook play)
398 031 133
TORX screwdriver
TX8z
007 993.50.00
Feed-dog height gauge
0.9/10mm
398 024 030
Feeler gauge
0.3mm/0.15mm
(Hook/driver play)
398 022.030 (0,3 mm)
398 111.030 (0,15 mm)
Pinning tool
(Stitch length stepping
motor)
030 652.50.00
398 112.030
Ω
Ω
398 083.030
IC-Extraction Tool
Multimeter

6
Note on Electrostatic Discharge (ESD)
Protection of electrical and electronic components against electrostatic
discharges
Electrostatic charges are caused by:
• a person's walking (influence) over synthetic tilled or carpeted floor
• friction between and separation of two insulating materials (triboelectricity)
If this static electricity discharges through electronic components, these may be partially or irreparably damaged.
Electrostatically charged persons or other insulators represent the greatest danger for components. This can be
dissipated by controlled electrostatic discharge.
Be sure to follow these important notes:
1. Always work at a stationary, ESD-
compliant workstation equipped with the
appropriate protective devices including
conductive table and floor mat, earth
connection box and earthing wristband
when doing service work.
The cable of the earthing wristband must
have a built-in resistance of 1MOhm to
ensure a person's protection.
2. Always put on an earthing wristband
before starting to work. Always remove
any synthetic parts like plastic bags,
covers etc. from your workstation.
3. Only open ESD protective packaging at
your ESD-proof workstation while
wearing an earthing wristband. Electronic
components must be placed on
conductive table mats only. Packing is
carried out under the same conditions.
4. Only use conductive plastic/foil ESD
pouches and ESD transport boxes for the
shipping/forwarding of electronic
components - even if the components
might be faulty.
5. Treat faulty PCBs like new goods.

7
Block diagram
Winder Motor
DC / 5 Volt
P-Print
S-Print
Buttonhole
Sensor 4P
Foot
Pressure 3P
BSR
4P
Foot
Pressure
BSR
Foot
Winder
Motor 4P
SB-Motor
4P
SL-Motor
4P
P-Print
L-Print
S-Print
8P
Mains
Switch
Mains
supply
Main Motor L-Print
8P
Stepper Motor
Driver
Main Motor Drive
USB to
RS-232
Converter
Keypad with
29 rubber keys
Micro-
Processor
Symbolic LCD with
LED backlight
CFL Sewing light
with
Backlight converter
CFL RET-Print
S-Print
RET-Print
Upper thread
sensor
USB
Host 4P
EMB
8P
Foot
Control 3P
EMB-Module
Foot Control Unit
Main Motor
30 Volt / DC
Sewing Light
S-Print
Drop-Feed Sensor
Drop Feed
Switch 2P
Background lighting
P-Print
S-Print
Buttonhole
Sensor 4P
Foot
Pressure 3P
BSR
4P
Foot
Pressure
BSR
Foot
Winder
Motor 4P
SB-Motor
4P
SL-Motor
4P
P-Print
L-Print
S-Print
8P
Mains
Switch
Mains
supply
Main Motor L-Print
8P
Stepper Motor
Driver
Main Motor Drive
USB to
RS-232
Converter
Keypad with
29 rubber keys
Micro-
Processor
Symbolic LCD with
LED backlight
CFL Sewing light
with
Backlight converter
CFL RET-Print
S-Print
RET-Print
Upper thread
sensor
USB
Host 4P
EMB
8P
Foot
Control 3P
EMB-Module
Foot Control Unit
Main Motor
30 Volt / DC
Sewing Light
S-Print
Drop-Feed Sensor
Drop Feed
Switch 2P
Background lighting
PC
The electronics of the BERNINA
aurora are primarily
accommodated in two main
modules (PCBs) - the L-Print
(power PCB) and the S-Print
(Control via micro-
processor).

8
PCBs, plugs and cables
L- Prin
t
8 poles
white
L- Print
L- Prin
t
8 poles
white
L- Prin
t
8 poles
white
L- Print
P- Print 30 poles
Sensor Upper
Thread
RET- Print
P- Print 30 poles
Thread
P- Print 30 poles
Thread
RET- Print
Presser Foot
Sensor 2 poles
black
Motor SB
4 poles white
Buttonhole
4 poles white
Presser Foot
Pressure
3 poles red
Motor SL
4 poles blue
S-Print 30 poles
white
Bobbin Winder
3 poles
yellow
Sensors
BSR Sensor
4 poles red
Presser Foot
Sensor 2 poles
black
Motor SB
4 poles white
Buttonhole
4 poles white
Presser Foot
Pressure
3 poles red
Motor SL
4 poles blue
S-Print 30 poles
white
Bobbin Winder
3 poles
yellow
Sensors
BSR Sensor
4 poles red
P- Print
Foot Control
Main cable

9
Micro
Processor
P- Print
30 poles
white
Driver
Processor
Motor
2 poles
white
L- Print
8 poles
white
USB
4 poles
EMB
8 poles
Foot Control
3 poles
CFL 2 poles
white
RET- Print
30 poles
Sensor
Feed-Dog
Drop
Background
Lighting
2 poles white
Driver
S- Print Micro
Processor
P- Print
30 poles
white
Driver
Processor
Motor
2 poles
white
L- Print
8 poles
white
USB
4 poles
EMB
8 poles
Foot Control
3 poles
CFL 2 poles
white
RET- Print
30 poles
Sensor
Feed-Dog
Drop
Background
Lighting
2 poles white
Driver
S- Print
Ribbon cable function
What to test:
Electrical resistance of cables
Visual check
Electronic measurement by ohmmeter or
continuity tester (beeper)
What to adjust:
Disconnect mains plug, remove covers and
unplug cables from both printed circuits.
Set measuring instrument to beeper or Ohm
area.
Check each cable wire.
This involves placing the measuring tips on
the top of the connector against the metal
cutters to check each wire against the other.
Desired status
Check cables for damage, short circuits,
and line disconnections.
Check plug and socket for damage, bent
or loose contacts.
Each wire individually:
If the wire is OK:
• Ohm on the ohmmeter; beep signal on
beeper
Defective wire:
Ohm on ohmmeter; no beep signal on
beeper (interruption)
Each wire against the other wires:
If the wire is OK:
Ohm on ohmmeter; no beep signal on
beeper
Defective wire:
• Ohm on ohmmeter; beep signal on
beeper (short circuit, squashed wires)
Ω
Ω
CFL 2 poles
white
Background
Lighting
2 poles white
CFL 2 poles
white
Background
Lighting
2 poles white
ATTENTION High Voltage!
700V

10
There is also a RET-Print (return) with three
sensors and a light barrier for the upper
thread indicator, and the P-Print.
The P-Print contains the light barriers for the
synchronizing disc and the connectors for the
motors and sensors.
General functions of the PCBs
The microcomputer on the S-Print receives an analogue signal from the foot control which is
converted into a digital signal and reported as a nominal value. The motor r.p.m is adjusted to
the required value by comparison of the predetermined and actual values. When the foot
control is released (nominal value zero) the microcomputer switches on the electrical brake.
The motor is stopped very quickly in the required needle position.
On switching on the sewing/embroidery computer, the stepping motors may be in any given
position. The microcomputer control memory may also have any given value. The stepping
motors are moved to their pinning position by means of a command from the microcomputer
to give a defined situation. This position is then registered and set to zero in the memory. This
zero position then allows any stitch programme to be selected and sewn.
The S-Print controls the processes between the individual stepping motors, evaluates the
signals of the sensor and shows the results on the display.
RET-Print
P-Print

11
Universal L-Print (Power Print)
S-Print
The power PCB (L-Print) is installed in the
cover at the rear of the sewing machine. The
circuit components of the L-Print produce the
following direct current voltages:
• 5 V/DC for the logics on the S-Print
• 12 V/DC for the sewing light
• 30 V/DC for the main motor, winder
motor and stepping motors
• 16 V/DC for the motor control on the S-
Print
In the event of malfunction, the F2 (T-3, 15A
secondary) / F3 (F-4A primary) fuses protect
components against overload. If a fuse blows,
this is always for a reason. The cause must be
be identified and rectified. An original
replacement fuse of the correct rating must
be used. It is essential to test the functions on
replacing the fuse.
The L-Print and S-Print are connected via an
8-pin ribbon cable.
The S-Print is manufactured according to
S.M.D. (Surface Mounted Device)
technology.
S.M.D. components facilitate very compact
circuitry.
S.M.D. printed circuits cannot be repaired
with conventional tools!
The sewing computer data is saved on an
EEPROM on the S-Print. If the S-Print needs
to be replaced, that EEPROM must be
moved to the new S-Print. See 'Replacing
the S-Print'see page 54.

12
Diagnostic instructions
Powering the stepping motors
Before carrying out any servicing or repair work
In order to allow the stepping motors to
operate correctly, it is essential that they are
returned to their "zero" position after each
restart of the sewing computer or change of
function. In order to adjust this "zero"
position, the stepping motors must be
powered (under current). Replacement
motors should be adjusted before they are
fitted into the machine. To achieve this, the
motor must be connected to the P-Print at
the appropriate plug, which in turn must be
connected to the power supply and the S-
Print. Plug in the power cable, then select
Test 3.4 in the service programme. This
programme powers the stepping motors to
their correct current values.
The motors can then be adjusted according
to the servicing instructions of the service
manual.
Stepping motor SB (Stitch width) => page 59
Stepping motor SL (Stitch length) => page 60
Certain data must be recorded before starting
servicing or repair work. This is to avoid loss
of data when replacing PCBs and for use
when comparing with the factory settings.
This data includes descriptions of the sewing
and embroidery computer, machine data,
data which had been changed in the Setup
by the user and original Setup data.
Some of the data (machine data) is saved on
an exchangeable EEPROM on the main print.
This EEPROM can only be exchanged with a
special tool (page 5) on the anti-static pad
(page 49).

13
W
War
arning!
ning!
Danger
Dangerous voltage levels!
ous voltage levels!
Mains voltage (refer to L-Print on page 11
Caution!
The L-Print (power) switch and the mains
cable carry dangerous voltages.
For your own safety do not touch the L-
Print until about 30 seconds after the
main voltage has been switched off. This
is the time required for the capacitors to
discharge.
Warning!
The sewing/embroidery computer may
only be connected to the mains supply
when the covers are mounted.
Work on the L-Print and mains cable may
only be carried out when the mains plug
has been removed from the mains supply.
Hot plugging of cables can cause damage
to semi-conductors.
Micro
Processor
P- Print
30 poles
white
Driver
Processor
Motor
2 poles
white
L- Print
8 poles
white
USB
4 poles
EMB
8 poles
Foot Control
3 poles
CFL 2 poles
white
RET- Print
30 poles
Sensor
Feed-Dog
Drop
Background
Lighting
2 poles white
Driver
S- Print Micro
Processor
P- Print
30 poles
white
Driver
Processor
Motor
2 poles
white
L- Print
8 poles
white
USB
4 poles
EMB
8 poles
Foot Control
3 poles
CFL 2 poles
white
RET- Print
30 poles
Sensor
Feed-Dog
Drop
Background
Lighting
2 poles white
Driver
S- Print
CFL 2 poles
white
Background
Lighting
2 poles white
CFL 2 poles
white
Background
Lighting
2 poles white
ATTENTION High Voltage!
700V

14
Service Program
Panel layout
13
15 16
14
Y
Start / Stop
17 18 19
OK ESC
Service Start
20 21
22 23
24 25 26
292827
-/+-+
-
-
+
+
123
456
78 9
10 11 12
e
i
d
b
c
g
f
a
h
Needle Positions 1 to 11
p
o
q
jklmn
Aurora 430 /440 031 216.50.00
13
15 16
14
Y
Start / Stop
17 18 19
OK ESC
Service Start
20 21
22 23
24 25 26
292827
-/+-+
-
-
+
+
123
456
78 9
10 11 12
e
i
d
b
c
g
f
a
h
Needle Positions 1 to 11
p
o
q
jklmn
Aurora 430 /440 031 216.50.00Aurora 430 /440 031 216.50.00
Servicing program relevant keys and display are shown on the panel above. The screen serves
as a display, complemented by the symbols (a to q) on the panel. The keys are numbered from
1 to 29.
Please note that all tests in number 11 are not implemented!
Symbols (letters) display on panel
a = stitch length bar display
b = presser foot, 2 x 7 segments
c = stitch length, 3 x 7 segments
d = stitch width, 2 x 7 segments
e = stitch width bar display
f = needle position bar display
g = matrix
h = buttonhole
i = alphabets
j = balance
k = servicing
l = cleaning/oiling
m = BSR
n = feed-dog drop
o = needle stop
p = presser foot pressure
q = presser foot lifter
d
c
a
e
h
g
i
j
k
l
m
o
n
q
pb
f
Symbols

15
Functions of keys on panel
1-12 = program
13-16 = available
17 = OK, return to basic program with saving of data
18 = start/stop, confirm and start or quit particular test
19 = ESC, return to basic program without saving data
20 = -, reducing the stitch length
21 = +, increasing the stitch length
22 = -, reducing the stitch width
23 = +, increasing the stitch width
24 = -, when 25 is simultaneously pressed the value in the respective test is reduced by one unit
25 = related to 24 or 26
26 = +, when 25 is simultaneously pressed, the value in the respective test is increased by one unit
27-29 = available
Y = available (slide speed control SSU - Start/Stop unit)
Start/Stop
17 18 19
OK ESC
Service Start
ojklmn
Start/Stop
17 18 19
OK ESC
Service Start
ojklmn
Starting and exiting the basic program
To access the servicing program, hold down
the 17, 18 and 19 keys while switching the
machine on.
To exit the servicing program, go to the basic
programme and switch machine off. To
activate the sewing program, switch the
machine on again without holding down the
17, 18 and 19 keys.
Navigation
You enter the servicing program at the basic
program. The display in the matrix reads SP.
Various sensors can be tested directly here.
The actual tests are selected by pressing keys
1-12. Depending on the test required, it may
be necessary to press the respective key
several times. The selected test is displayed
within the matrix symbol g for confirmation.
The values of tests that have only a display
function (INFO) appear in the described
places. With the other tests, the test starts
when key 18 (start/stop) is pressed. There are
a few tests which require multiple pressing of
key 18 to either confirm a state or to proceed
step-by-step within the test.
Press key 17 (OK, exit with saving) or 19
(ESC, exit without saving) to return to the
basic program.
Keys 24 to 26 are needed for adjustments.

16
Service Tests (SP - Service Program)
SP 0 Sensors test in basic program
SP 0.1 Functional test of operating voltages & data transfer signals.
The voltages and the data transfer signals on
the S-Print are displayed by means of LEDs
under the service cover B. To access these,
press the front of the cover at point (A) and
swing the service cover (B) forward.
A
LEDs on S-Print
Information sticker behind the
service cover B.
B
30 V
12 V
5 V
PC M/C
M/C PC
1
2
3
4
5

17
Meaning and function of LEDs
What to test:
Desired status:
Actual status:
Repair note:
(if status is as “Actual status”)
LED1 / 30V
Lit
Not lit
• Check the wiring for
deformation, tears or breaks.
Replace if necessary.
• Check the connectors for
deformations. Replace if
necessary.
• Check L-Print functioning.
Replace if necessary.
• Replace S-Print
LED2 / 12V
Lit
Not lit
• Check the wiring for
deformation, tears or breaks.
Replace if necessary.
• Check the connectors for
deformations. Replace if
necessary.
• Check L-Print functioning.
Replace if necessary.
• Replace S-Print
LED3 / 5V
Lit
Not lit
• Check the wiring for
deformation, tears or breaks.
Replace if necessary.
• Check the connectors for
deformations. Replace if
necessary.
• Check L-Print functioning.
Replace if necessary.
• Replace S-Print
What to test:
Desired status:
Actual status:
Repair note:
LED4 / USB
flashing =
data is being transferred from PC
to sewing computer via USB
not flashing =
no data transfer from PC to
sewing computer
• Check the wiring for
deformation, tears or breaks.
Replace if necessary.
• Check the connectors for
deformations. Replace if
necessary.
• Replace S-Print
• Have PC checked by dealer
LED5 / USB
flashing =
data is being transfered from
sewing computer to PC via USB
not flashing =
no data transfer from sewing
computer to PC
• Check the wiring for
deformation, tears or breaks.
Replace if necessary, Measure
continuity
• Check the connectors for
deformations. Replace if
necessary, Measure continuity
• Replace S-Print
• Have PC checked by dealer
Only when connected to a PC

18
SP 0.2 Foot control functional test
What to test:
Desired status:
Actual status:
Repair note:
Foot control
Connect foot control in test basic program
Activate foot control.
The foot control setting is indicated on the stitch length
bar display.
When the foot control is pushed down at the heel
end, the stitch length bar will indicate up to 1.
• Check the foot control connector for deformations.
Replace if necessary.
• Check the foot control cable for deformation, tears or
breaks. Replace if necessary.
• Check the mechanical parts of the foot control.
Adjust if necessary.
• Check functioning of foot control PCB. Replace if
necessary.
• Replace S-Print
SP 0.3 SSU Start/Stop unit slide control
What to test:
Desired status:
Actual status:
Repair note:
SSU slide control
Test in basic program
Move slide back and forth.
The position of the SSU slide control is indicated on
the stitch width bar display.
• Replace S-Print
This manual suits for next models
1
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