Husqvarna 1200 User manual

104 72 30-26 Husqvarna service manual 1
SERVICE MANUAL
MODEL
1200, # 1
1100
1090
1070
1050
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2 Husqvarna service manual 104 72 30-26
Contents
Survey settings 4
User instructions 5
Gauges and service 6-7
Visual control of details 8-12
Electronics 13-22
Stich plate 8
Presser foot 8
Feed dog 8
Bobbin case 9
Hook cover 9
Hook 10
Driver 10
Main switch and feed dip button 10
Foot control 11
Cog belt, short 12
Cog belt, long 12
Wiring diagram 13
Service casette 14-17
Switch for presser foot lift 18
Buttonhole meter 18
Lower thread indicator 19
Stepmotors:Thread tension, sewing head, guide, side motion 20
Transformer 1050/1070/1090 21
Transformer 1100/1200 22
Electronic board 1050/1070/1090 21
Electronic board 1100/1200 22
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104 72 30-26 Husqvarna service manual 3
Setting instructions
1 The hook gear 23
2 The gap between the hook cover and the driver 24
3 Presser foot, parallelism to the stitch plate 25
4 Setting the presser foot at right angles to the feeding direction 25
5 Setting of the step motor of the sewing head 26
6 Setting of the needle in relation to the presser foot 27
7 The gap between the hook and the needle 28
8 Setting the stitch plate in relation to the needle 29
9 Timing of the hook in relation to the needle 30
10 Needle height 31
11 Thread tension of the bobbin case 32
12 Upper thread tension 32
13 Setting the thread tension of the step motor 33
14 The setting of the thread take-up spring 33
15 Parallelism of the feed dog 34
16 The sideways setting of the feed dog 34
17 The feed dog height 34
18 The lengthwise movement of the feed dog 35
19 The bobbin-winding device 35
20 The balance of the stitch length 36-40
21 Pre-setting of the step motor of the guide 41
22 Pre-setting of the step motor of the side motion 42
23 The sideways setting of the feeding mechanism 43
Dismounting- and mounting instructions
Rear cover, lower cover 44
Front cover 44
Parts of the front cover 44
Parts of the front cover 1100/1200 program memory 45
Parts of the front cover 1100/1200 foil keyboard 46
Transformer 47
Main motor 48
Bobbin-stop 48
Circuit board 48
Foot control 49
Feeding guide compl 50
Connecting rod 51
Feeding mechanism unit with stitch regulator fork 51
Thread tension device compl 52
Driver 52
Lower shaft 53
Sewing head 54
Arm shaft 55
Side motion mechanism cpl 56
Fault finding diagram 57
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4 Husqvarna service manual 104 72 30-26
SETTINGS
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104 72 30-26 Husqvarna service manual 5
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 four 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 controls the working order of the different parts.
The second section deals with the various settings which must be maintained to ensure that
the machine functions satisfactorily.
The third section covers dismantling and mounting instructions.
The fourth section contains a fault-finding diagram.
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.
wrist band position for wrist band
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6 Husqvarna service manual 104 72 30-26
Setting gauges
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 chiefly
intended as an indication as to how service men or service
workshops should be equipped.
The needle is often used as a setting gauge. The setting ratings
are adapted to needle size 90 and when setting in the feed direction,
the needle should be set in the middle of the needle hole. (Page.29).
Be sure to use an undamaged needle.
2. Gauge for setting the timing of the hook in relation to
the needle (P.30).Ref. No 411 17 52-01.
3. Gauge for the gap between the hook cover and driver.
(P.24). Ref. No 412 31 91-01.
4. Gauge for feed dog height (P.34).
Ref. No 411 49 93-01.
5. Weight for setting the thread tension of the
bobbin case (P.32).
Ref. No 412 15 83-01 (=22 g.)
6. I. Distance gauge (1,2mm) to set the step motor
of the sewing head (P.26).
II. Gauge for the centre position of the needle (P.26).
III. Distance gauge (0,6mm) for the pre-setting of the
step motor of the guide older version (P.41).
Ref. No compl. I-III. 412 27 60-01.
7. Electronic unit for testing the function of
the transformer and the stepmotors.
See separate instructions enclosed.
Ref. No 412 02 56-01.
8. Service casette for 1100, 1200 (P.14-15).
Ref. No 412 17 29-15.
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Service tools
1. Fixed spanner 10mm to set the belt, long (P.12) and
the gap between the hook and the needle (P.28).
Ref. No 411 85 99-01
2. Fixed spanner 5mm to set the stitch plate in relation
to the needle (P.29).
Ref. No 411 85 98-01
3. Fixed spanner 5,5mm for the sidewards setting of the
feed dog (P.34).
Ref. No 411 54 31-01.
4. Adam keys:
-0.9mm for the timing of the step motor of the
thread tension (P.33).
Ref. No 412 27 71-01.
-1,5mm for needle clamp and step motors.
Ref. No 411 66 89-01.
-2,5mm for the timing of the hook in relation to the
needle (P.30) and for the gap between the hook
cover and the driver (P.24).
Ref. No 411 86 01-01.
5. Shortened adam key 2,5mm for the setting of the
presser foot (P.25) and of the needle in relation to
the presser foot (P.27).
Ref. No 412 27 65-01.
6. Key to set the stitch length balance (P.36-40).
Ref. No 412 27 66-01.
7. Magnetic screwdriver with two separate heads.
Ref. No 411 54 33-01.
8. Screwdriver Torx 10
Ref. No 412 36 48-01.
Screwdriver Torx 20
Ref. No 412 36 49-01.
ScrewdriverTorx 25
Ref. No 412 36 50-01.
9. Angle key forTorx 6
Ref. No 412 27 67-01.
10.Wristband for ESD
Ref. No 412 23 02-01.
11.Extractor tool (p. 45).
Ref. No 412 27 98-01.
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8 Husqvarna service manual 104 72 30-26
VISUAL CONTROL OF DETAILS
Stitch plate
Requirements
The stitch plate must not be damaged in any way.
Particular attention should be paid to possible damage or
unevenness around the needle hole.
Action
Exchange the damaged stitch plate.
Mounting of a new stitch plate
In order to get the stitch plate into the correct position it
should be first mounted with the spring (A) and screws (B)
somewhat loose. Thereafter remove the stitch plate, fasten
the screws an remount the stitch plate.
Setting to needle, (P.29).
Presser foot
Requirements
There should be no scratches on the underneath of
the presser foot.
Action
Exchange a damaged presser foot.
Comments
How the fabric is held between the presserfoot and
the stitch plate plays an important role in the stitch
formation. Refer to all presser feet.
See Operating Manual.
Feed dog
Requirements
The top side of the feed dog must not be damaged
in any way, e.g. broken teeth etc.
It should be free from fluff and pieces of thread.
Compare with Operating Manual:
”Care of the machine”.
Action
The faulty dog should be exchanged.
Remove the stitch plate.
Undo the screws and replace the feed dog.
As regards to the settings of the feed dog (P.34-35).
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Bobbin case
Requirements
The thread tension spring, in its whole width, must be
parallel to and press against the side of the bobbin case.
Action
Remove any fabric dressing which may have fastened
under the thread tension spring.
Damaged thread tension spring is to be exchanged.
Comments
Deposits from fabric or thread can fasten on the spindle
of the hook.
In that case the spindle should be carefully cleaned with
the brush in the accessory box.
At the same time make sure that pieces which may have
become wound around the spindle are removed.
Thread tension of the bobbin case, (P.32).
The hook cover
Requirements
The inside of the hook cover must not be damaged.
Action
Damaged hook cover must be exchanged.
Regarding the gap between the hook cover and the
driver, (P.24).
Comments
The inside of the hook cover forms a support for the
hook and the bridge above the finger of the bobbin
case supports the thread, so that the thread loop is
formed on the correct side of the needle.
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The hook
Requirements
The tip of the hook (A) and surface (B) must not
be damaged.
Action
Exchange the damaged hook.
The driver
Requirements
The surface of the driver against the hook must not
be damaged, worn or uneven in any way which might
hinder the passage of the thread.
Action
Damaged hook is to be exchanged (P.52).
The main switch and feed dip button
If the main switch or the feed dip button doesn’t work
satisfactorily, remove the rear cover and front panel, (P.44).
Exchange the complete unit or spring (A).
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