Husqvarna 1200 Bedienungsanleitung

104 72 30-26 Husqvarna service manual 1

SERVICE MANUAL

MODEL

1200, # 1

1100

1090

1070

1050

SEWKNITWORLD

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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104 72 30-26 Husqvarna service manual 7

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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104 72 30-26 Husqvarna service manual 9

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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10 Husqvarna service manual 104 72 30-26

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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