Husqvarna Viking Designer I User manual

Printed in Sweden
Made in Sweden
March 1999 104 72 47-26
Replaces 104 72 45-01
SERVICE MANUAL

2104 72 47-26
Contents
Directions for use 4
ESD 4
Service tools 5
Service program
Upper thread tension - Functions of the service menu 3. 9
Sensor check - Functions of the service menu 2. 9
Calibration of the touch panel 10
Update of the memory 11
Covers
Upper rear cover 12
Lower rear cover 12
Front cover 13
Parts of the front cover 14
LCD 14
Touch Panel 14
Floppy disk drive 14
Settings 15
1. The play of the hook gear 16
2. Setting the hook in relation to the feeding eccentric (after feeding) 17
3. Belt tension, arm/lower shaft belt 18
4. Belt tension, motor belt 18
5. Setting the feeding unit sideways 19
6. Basic setting - the step motor of the needle 20
7. Setting of the needle in relation to the presser foot 22
8. The gap between the needle and the hook 23
9. The timing of the hook in relation to the needle 24
10. The needle height 25
11. Presser foot parallelism to the feed dog 26
12. Presser foot height to the stitch plate 26
13. Setting the stitch plate (the hook cover) in relation to the
needle in the feeding direction. 27
14. The sideways setting of the stitch plate (the hook cover) in
relation to the presserfoot. 27
15. The height of the hook 28
16. Pre-setting of the step motor for the side feeding 29
17. Setting the feeding mechanism sideways 30
18. Feed dog height 31
19. Threading device 32
20. Stitch length balance basic setting 33
21. Pre-setting the step motor of the feed dog 34
22. Stitch length balance 35
23. Lower thread tension (thread tension of the bobbin case) 36
24. Upper thread tension - Normal position 37
25. Upper thread tension - Embroidery position 38
26. Upper thread guard sensor 39
27. Setting the thread take-up spring 40
24. Upper thread tension 40
28. Disconnection when winding the lower thread 41

3
104 72 47-26
Dismantling and mounting
Base Plate 42
Transformer 43
Circuit board - Circuit diagram 44
Stop right circuit board 45
Sewing head 46
The step motor of the needle 47
The step motor of the presserfoot lifter 48
The thread tension compl. 49
The hook cover compl, step motor house. 50
Parts of the hook cover compl. 51
Feeding unit 52
Feed dog. 53
The side feeding mechanism cpl. 54
The step motor of the side feeding mechanism . 54
The step motor of the feeding unit 55
Hook compl. 56
Bobbin winding device 57
Cover Y-slide 58
Step motor cover 58
Embroidery Unit
Cover upper part 59
Cover lower part 59
Locker switch 59
Embroidery unit - X-unit 60
Belt tension 60
Calibration of the end position, X-unit. 60
Embroidery unit - Y-unit 61
Belt tension 61
Calibration of the end position, Y -unit. 61
Hoop holder 62
The hoop sensor. 62
Step motor, Y-unit 63
Step motor, X-unit 63
Fault finding diagram. 64

4104 72 47-26
Directions for use
These service instructions are intended to be used by service workshop personnel, or by
salesmen who carry out servicing their own districts. They assume a thorough knowledge
of the handling of precision appliances and accessibility to service tools.
The manual is divided into two sections and covers all service operations and checks
which should be carried out when making a complete overhaul of a sewing machine.
The first section deals with the various settings which must be maintained to ensure that
the machine functions satisfactorily.
The second section covers dismantling and mounting instructions.
The diagrams only give indication as to where the detail or mechanism is located in
the machine. For more detailed information regarding the construction, etc., refer to
the diagrams in the spare parts list.
ESD
ATTENTION!
It is of the utmost importance that precautions are being taken in order to avoid damage
of the electronics by electro static discharges ESD (=Electro Static Discharge). To avoid
that these errors arise it is important to handle loose circuit boards in a controlled way.
Always use wrist band 412 23 02-01 when servicing.

5
104 72 47-26
Service tools
A reasonable requirement in a domestic sewing machine is that it should able to sew all
types of fabrics used in the home. The settings made when assembling and sewing-in
the machines are those most suited to give the best results in the majority of fabrics and
fabric combinations. In doing so, consideration has been given to the requirements of
different markets. This does, however, mean that when sewing extreme fabrics, better
results may be obtained in certain cases by altering the settings. It must be pointed out
that these altered settings can cause poorer results on more normal fabrics. How
the different standard ratings are set can be seen from the description under each
setting instruction. The following list of setting gauges and service tools is intended as
an instruction about the special service tools needed to servicing this machine.
1. On several different occasions the needle is
used as a setting gauge.
The setting ratings are adapted to needle 90.
Make sure to use an undamaged needle.
2. Gauge for setting the timing of the hook in
relation to the needle .
Ref. No 411 17 52-01.
3. Gauge for the feed dog lift.
Ref. No 411 49 93-01.
4. Gauge for the needle height .
Ref. No 412 35 29-01.
5. Adam key 2.5 mm
Ref. No 411 86 01-01
6. Adam Key 2 mm
Ref. No 411 86 00-01
7. Adam key 1.5 mm
Ref. No 411 66 89-01
8. Distance gauge 0.05-1,00 mm
Ref: No. 412 38 85-01
9. Angel key Torx 6
Ref No 412 27 67-01
10. Screwdriver Torx 10
Ref. No 412 36 48-01.
11. Screwdriver Torx 20
Ref. No 412 36 49-01.
12. Screwdriver Torx 25
Ref. No 412 36 50-01
13. Cable set for service
Ref. 412 49 08-01
14. Calibration of touch panel
Ref. No 412 22 33-01

6104 72 47-26
Press
Service program
In order to facilitate the checking and setting of the different functions of
the machine there is a service program.
Handling
Get into the service program of the machine by pressing the reverse feed button and
the sensor foot pivot button while the main switch (A) is switched on.
The display will now show the Designer 1 service menu 1. See illustration below.
Service Program

7
104 72 47-26
Service program
Functions of the service menu 1.
On the top of menu The revision of the program
Service Menu 1
Row 1 Toucharea
Needle/Feed Cal 0 Upper needle position - Checking the centre position of the needle
step motor.
Lower needle position - Checking the centre position of the feeding
step motor.
Needle Lpos Is used for pre-setting the step motor of the needle.
The step motor of the needle now takes its left calibration position.
Needle Opos Is used when setting the centre position of the needle.
The step motor of the needle is now in its centre position.
Needle Rpos Is used for pre-setting the stepmotor of the needle.
The step motor of the needle now takes its right calibration position.
Feed 0 pos Is used when coarse-adjusting the stitch length balance
The feed dog should now stand still ( 0-feeding).
Feed C pos Is used when pre-setting the feeding step motor.
The step motor now takes its calibration position.
Service Menu 1
Row 2 Toucharea
Side motion L Left position.
Side motion R Right position.
Tension Menu Setting of the thread tension. (The machine will enter Service
Menu 3)
LCD Contrast + The contrast of screen.
LCD Contrast - The contrast of screen.
Touch Cal Calibration of the touch display.
Service Program

8104 72 47-26
Service Menu 1
Row 3 Toucharea
Servo-sewing head On/Off Sewing heads Servo function ON and OFF.
Servo - sewing head Cal Servo takes its calibration position.
Embroidery Unit Cal Is used to check the sideways and lenghtwise
movement of the embroidery unit.
Embroidery Unit Cent The embroidery hoop sensor arm takes its centre position.
Disp Display test. A square pattern shall change between
blue,red and green. After the check is done the machine
will automatically enter the service menu 1 again.
Sensors Menu Sensor check. (The machine enters Service Menu 2).
Service Menu 1
Row 4 Toucharea
0x0 Is used when coarse-adjusting the stitch length balance
The feed dog should now stand still ( 0-feeding).
2,5x0 The machine sews straight stitch 2,5 mm.
4.0x0 The machine sews straight stitch 4 mm.
6,0x0 The machine sews straight stitch 6 mm.
4x4 The machine sews a zig zag stitch 4x4 mm.
6x6 The machine sews a zig zag stitch 6x6 mm.
Service Menu 1
Row 5 Toucharea
SM The machine sews a side motion stitch.
Hem
Mend Is used for fine-adjusting the stitch lenght balance.
The machine now sews a pre-programed mending stitch.
MM
Rep The machine sews signs B,P,R,S.
Embr The machine sews the first embroidery on an inserted
Embroidery disk.
Service Menu 1
Row 6
On-Time Indicates how many hours and minutes the machine has been
switched on.
Sew-Time Indicates how many hours and minutes the machine has been
sewed on.
Embr-Time Indicates how many hours and minutes the machine has been
embroidered on.
Service Program

9
104 72 47-26
Sensor check - Functions of the service menu 2.
Operation
Get into the service program. Touch Sensor- , row 3.
Upper thread tension - Functions of the service menu 3.
To facilitate the setting of the upper thread tension there is an electronic adjustment
in the Service menu 3.
Operation
Get into the service program.Touch Tension- -,row 2. The machine will enter Service Menu 3.
Toucharea
2,5x0 The machime sews a straight stitch 2,5 mm
4x0 The machine sews a straight stitch 4 mm
6,0x0 The machine sews a straight stitch 6 mm
4x4 The machine sews a zig zag stitch 4x4 mm
0,4x6 The machine sews a zig zag stitch 0,4x6 mm
Embr The machine sews the first embroidery on an
inserted embroidery disk.
Back Back to service menu 1
Check of armshaft's first sensor (stop right function)
Check of armshaft's second sensor (stop right function)
Check of needle
Check of pressarfoot's first sensor
Check of pressarfoot's second sensor
Check of lower thread guard indicator
Check of upper thread guard indicator
Check if embroidery unit is connected
Embroidery hoop sensor- Indicates when sensor is on calibration mark
The bobbin winding sensor
The bobbin winding sensor -Indicates when bobbin is wounded.
Button hole sensor check
Tension Norm -Blue
Is used for adjustment of the upper thread tension at
normal sewing . The value is normally set between +10
and -10. The value on the display is changed gradually
each time you touch the touch area.
Note! There are limitations in the setting. The
value of the setting could be higher then +10 or
lower then -10 .
Tension Embr- Red
Is used for adjustment of the upper thread tension at
embroidery sewing.The value is normally set between
+10 and -10.
The value on the display is changed gradually each
time you touch the touch area
Note! There are limitations in the setting. The
value of the setting could be higher +10.
Active square is filled
Service Program
Clr - Used to erase everything programed
in the programmable memories ot the
machine
Back to service menu 1

10 104 72 47-26
1
2
First calibration mark
Second calibration mark
Calibration of the touch panel
How to synchronize the touch area of the touch panel with the symbols on the screen.
Get into the service program of the machine.
Press the needle stop button or touch Touch ,row 2 in the service menu 1.
1. Touch with a blunt object in the center of cross 1 ,indicated First calibration mark
on the illustration. When the colour changes from black to green the first calibration of
the touch panel is set.
2. Touch with a blunt object in the center of cross 2, indicated Second calibration mark
on the illustration. When the second and final calibration of the touch panel is set the
machine will now automatically enter the service menu 1.
Set the calibration of the touch panel with gauge 412 22 33-01
Service Program