Janome MC15000 User manual

MC15000 (Ver.2.0)
SERVICE MANUAL

INDEX
Changing External Parts
Face cover .................................................................................................................................................................1
Belt cover ..................................................................................................................................................................1
Top cover ...................................................................................................................................................................2
Base plate..................................................................................................................................................................3
Base cover.................................................................................................................................................................3
Bed cover ..................................................................................................................................................................3
Free arm cover ..........................................................................................................................................................4
Front cover.................................................................................................................................................................5
Rear cover .................................................................................................................................................................6
Replacing Electronic Components
Printed circuit board A ...............................................................................................................................................7
Communication module......................................................................................................................................... 8-9
Printed circuit board U1...........................................................................................................................................10
Printed circuit board U2...........................................................................................................................................11
Printed circuit board K .............................................................................................................................................12
Printed circuit board F .............................................................................................................................................13
Switching power supply unit ....................................................................................................................................14
USB unit ..................................................................................................................................................................15
Driving motor ...........................................................................................................................................................16
Thread tension unit..................................................................................................................................................17
Mechanical Adjustment
Feed dog height.......................................................................................................................................................18
Needle drop position................................................................................................................................................19
Hook Timing.............................................................................................................................................................20
Needle bar height ....................................................................................................................................................21
Clearance between needle and tip of rotary hook............................................................................................. 22-23
Backlash between hook drive gear and lower shaft gear ........................................................................................24
Upper shield plate position ......................................................................................................................................25
Upper thread tension...............................................................................................................................................26
Tension release mechanism ....................................................................................................................................27
Needle threader holder (threader hook replacement) .............................................................................................28
Needle threader hook position adjustment..............................................................................................................29
Needle thread motor replacement...........................................................................................................................30
Thread drawing lever...............................................................................................................................................31
Upper feed dog.................................................................................................................................................. 32-37
Buttonhole lever adjustment ....................................................................................................................................38
Thread cutter ...........................................................................................................................................................39
Presser bar lifter position.........................................................................................................................................40
Presser foot lifter stopper position ..................................................................................................................... 41-43
Automatic presser foot lifter initializing sensor position ...........................................................................................44
Presser bar height ...................................................................................................................................................45
Embroidery foot height ............................................................................................................................................46
Presser foot lifter switch...........................................................................................................................................47
Stretch stitch balance ..............................................................................................................................................48
Knee lifter ................................................................................................................................................................49
Remaining bobbin thread sensor.............................................................................................................................50
Needle plate sensor........................................................................................................................................... 51-52
Y-carriage play adjustment ......................................................................................................................................53
Cloth guide start position.........................................................................................................................................54
Parts List .......................................................................................................................................................... 55-85

1
Changing External Parts (1)
Face cover
To remove:
1. Open the face cover.
Disconnect the connector.
2. Remove the setscrews A (2 pcs.).
Remove the face plate.
To attach:
1. Follow the above procedure in reverse.
Belt cover
To remove:
1. Remove the caps.
2. Remove the setscrews A and B.
Connector
Face cover
Cap(s)
A
C
B
D
3. Loosen the setscrew C.
4. Loosen the setscrew D.
Remove the belt cover.
To attach:
1. Follow the above procedure in reverse.
A

2
Changing External Parts (2)
Top cover
To remove:
1. Open the top cover.
Remove the setscrew A.
2. Remove the setscrew B.
3. Close the top cover.
Raise the carrying handle.
Remove the setscrew C.
4. Detach the top cover for the machine.
Be careful that the connector for the bobbin winding motor
is still connected.
Disconnect the connector from the machine.
Remove the top cover .
To attach:
1. Follow the above procedure in reverse.
Be careful not to bind the cords when atttaching the top
cover to the machine.
A
B
C
Connector

3
Base plate
To remove:
1. Remove the setscrews A (3 pcs.).
2. Remove the setscrews B (2 pcs.).
3. Remove the base plate.
To attach:
1. Follow the above procedure in reverse.
Changing External Parts (3 )
A
A
A B
B
Base cover
To remove:
1. Remove the extension table.
Remove the setscrews A (4 pcs.).
Remove the setscrews B (3 pcs).
Remove the base cover.
To attach:
1. Follow the above procedure in reverse.
Base plate
Bed cover
To remove:
1. Remove the extension table.
Remove the setscrews A (2 pcs).
Remove bed cover.
To attach:
1. Follow the above procedure in reverse.
A
Bed cover
A
A
B
Base cover B

4
Gap No gap
5. Slide the free arm cover in the direction of arrow so there
should be no gap between the needle plate base plate and
free arm cover.
Remove the free arm cover.
* There are 3 hooks (C, D and E) holding the free arm
cover as indicated. Unlatch the hooks before removing
the free arm cover.
Changing External Parts (4)
Free arm cover
To remove:
1. Remove the needle and presser foot holder.
2. Push down the needle plate release lever.
Remove the needle plate.
3. Remove the bed cover (see page 3).
4. Remove the setscrew A and pin B.
BA
To attach:
1. Latch the hooks through the holes. Press down the Free
arm cover to the free arm. Slide the free arm cover to the
right until it clicks and stops. Be sure that the hook C is
latched to the thread cutter plate as shown.
2. Attach the setscrew and pin to fix the free arm cover.
3. Attach the needle plate. Press down the ◎ mark on the
needle plate until it clicks.
CDE
Thread cutter plate

5
Front cover
G
Changing External Parts (5)
H
Front cover
To remove:
1. Remove the belt cover and top cover (see page 1 and 2).
2. Loosen the setscrew (A, B, C, D, E and F).
3. Press down the rear cover through the holes (G and H)
with a screwdriver to unlatch the front cover.
4. Remove the front cover.
To attach:
1. Follow the above procedure in reverse.
A
B
C
D
E
F

6
Changing External Parts (6)
Connector A Face cover
B
Rear cover
To remove:
1. Remove the belt cover, top cover and base cover (see
page 1, 2 and 3).
2. Open the face plate and disconnect the connector.
3. Loosen the setscrews A and B.
4. Remove the setscrews C (2 pcs.) and D (2 pcs).
C
D
E
5. Press down the rear cover through the holes E to unlatch
the front cover.
6. Remove the rear cover.
To attach:
1. Follow the above procedure in reverse.

7
Machine motor
Phase sensor
Printed circuit board A connection
Printed circuit board U1 relay (24-pin)
Printed circuit board U2 relay (18-pin)
Printed circuit board U2 relay (20-pin)
Knee lifter sensor
LCD
Printed circuit board U1 relay (26-pin)
Printed circuit board B (USB board)
Foot control
Speaker
Replacing electronic components
Printed circuit board A
NOTE:
Do not disconnect the connectors by pulling on cord.
To disconnect the connectors, grasp the connector, not the
cord.
To remove:
1. Remove the front cover (see page 5).
2. Disconnect the connectors. Remove the setscrews A
(4 pcs.) and printed circuit board A.
To attach:
1. Follow the above procedure in reverse.
After replacing the printed circuit board A, adjust the following
parts:
• Knee Lifter (see page 48)
• Cloth guide start position (see page 53)
• Remaining bobbin thread sensor (see page 49)
• Presser bar height (see page 44)
• Embroidery foot height (see page 45)
* Adjust the embroidery foot height after the presser bar
height adjustment.
Printed circuit board A
A A
AA
Printed circuit board K1 relay (6-pin)
Printed circuit board K1 relay (26-pin)
Printed circuit board K1 relay (30-pin)
Printed circuit board U2 relay (14-pin)
TTP (Touch panel)
N/A
LCD module
Communication module
Power supply unit
Auxiliary power supply unit

8
Replacing electronic components
Communication module (1)
Symptom:
The wireless LAN on/off function is grayed out and the network
name and IP address are blank.
When the machine is turned ON, MC15000 performs
wireless LAN initialization according to either of the following
procedures:
a) An initialization according to the default setting value.
b) An initialization according to the previously stored setting
value.
In case of procedure b), it may require 20 seconds maximum
to perform the initialization.
Exit the wireless LAN setup menu. Be sure that 20 seconds
have passed after turning the power switch ON, and select the
menu again.
If the symptom persists after 20 seconds of standby time,
the communication module may be out of order or installed
improperly. Replace the communication module or try installing
the module again by following the procedure in next page.
BlankGrayed out

9
Replacing electronic components
Communication module (2)
To remove:
1. Remove the the printed circuit board A from the machine
(see page 7).
Tune the printed circuit board A rear-side up.
Hold the communication module lightly, and remove the
nuts (2 pcs.).
Nut
2. Remove the module from the printed circuit board A.
3. Flip the module and remove the spacers (2 pcs.) and
setscrews (2 pcs).
To attach:
1. Follow the above procedure in reverse.
Attach the communication module with the setscrews.
A torque to tighten the setscrews should be more than
1kgf·cm, and do not tighten the setscrews too much.
Parts #
862-528-005: Communication module
000-249-601: Spacer
000-062-206: Nut
000-169-802: Setscrew
Spacer

10
APrinted circuit board U1
Circuit board U1 connection
Buttonhole sensor
Presser foot lifter switch
N/A
Thread tension motor
Zigzag motor
Relay cable (2-pin)
Printed circuit board A relay
(24-pin)
Replacing electronic components
Printed circuit board U1
NOTE:
Do not disconnect the connectors by pulling on cord.
To disconnect the connectors, grasp the connector, not the
cord.
To remove:
1. Remove the top cover (see page 2).
2. Disconnect the connectors. Remove the setscrews A
(2 pcs.) and printed circuit board U1.
To attach:
1. Follow the above procedure in reverse.
A
LED (white)LED (Blue)
Printed circuit board
A relay (26-pin)
Needle threader motor
Bobbin winder motor
Presser foot lifter motor Thread cut detection

11
Bobbin thread sensor
potentiometer
Needle plate sensor switch
Printed circuit board A relay
(18-pin)
Feed motor
Printed circuit board A relay
(14-pin)
Bobbin thread sensor motor
Drop feed motor
Printed circuit board A relay
carriage
Relay (carriage)
Thread cutter motor
Replacing electronic components
Printed circuit board U2
NOTE:
Do not disconnect the connectors by pulling on cord.
To disconnect the connectors, grasp the connector, not the
cord.
To remove:
1. Remove the base plate (see page 2).
2. Remove the setscrew (A). Disconnect the connectors.
3. Disconnect the connectors and setscrews (B).
Remove the printed circuit board U2.
To attach:
1. Follow the above procedure in reverse.
Setscrew (A)
Cord binder
Setscrews (B) (3 pcs.)
Printed circuit board U2
Circuit board U2 connection

12
Printed circuit board K
To remove:
1. Remove the front cover (see page 5).
2. Disconnect the connectors from the circuit board K.
3. Remove the setscrews (3 pcs), and the circuit board K.
To attach:
1. Follow the above procedure in reverse.
Replacing electronic components
Circuit board K connection
Printed circuit board F
Printed circuit board L1
Slide volume
Printed circuit board L2
Printed circuit board
A relay 6-pin)
Printed circuit board
A relay (26-pin)
Printed circuit board
A relay (30-pin)
A A
A

13
Setscrews
A Printed circuit
board F
Printed circuit board F
To remove:
1. Remove the front cover (see page 5).
2. Disconnect the connector A from the circuit board K.
3. Remove the setscrews (2 pcs), and the circuit board F.
To attach:
1. Follow the above procedure in reverse.
Replacing electronic components

14
Switching power supply unit
• Before removing
1. Remove the belt cover, top cover, front cover and the rear
cover (see pages 1, 2 and 5).
• Removing the auxiliary power supply unit case
2. Disconnect the connector of the auxilliary power supply
unit from the printed circuti board A (see page 7).
Cut the tie band of the ferrite core and remove the cords
from the board.
3. Disconnect the connector B from the case.
4. Remove the setscrews C (2 pcs.).
5. Remove the auxiliary power supply unit case from the
machine.
Replacing electronic components
C
C
B
Auxiliary power supply unit case
DE
F
G
• Removing the power supply unit
6. Remove the setscrews D (top of the machine), E (under
the power supply unit), F and G (end of the holes as
shown).
7. Disconnect the connector H from the power supply unit.
8. Remove the power supply unit.
To attach:
1. Follow the above procedure in reverse.
Ferrite
core
Tie band
H

15
Ferrite
core
USB unit
• Before removing
1. Remove the belt cover, top cover and the front cover (see
pages 1, 2 and 5).
• Removing the USB unit
2. Disconnect the connector of the USB board from the
printed circuti board A (see page 7).
Cut the tie band of the ferrite core and remove the cords
from the board.
3. Remove the setscrews A (2 pcs.).
4. Remove the USB unit from the machine.
Replacing electronic components
A
Tie band

16
200 g pressure
5 mm
Setscrew
Replacing electronic components
Driving motor
To remove:
1. Remove the belt cover, the top cover, the front cover and
auxiliary power supply unit case (see page 1, 2, 5 and 13).
2. Disconnect the connector of the foot control from the
printed circuti board A (see page 7).
3. Disconnect the connector A from the power supply unit.
Remove the setscrew C and the ground wire.
Remove the setscrews B (3 pcs.) and the case D.
D
B
C
B
A
E
FF
4. Disconnect the driving motor connecter from the printed
circuit board A.
5. Remove the motor belt E.
6. Remove the setscrews F (2 pcs), and the driving motor.
To attach:
1. Attach the driving motor.
Tighten the setscrews F temporarily.
2. Adjust the motor belt deflection to about 5 mm by
pressing the middle of the motor belt with your finger with
approximately 200 grams of pressure.
3. Tighten the setscrews F securely.
4. Attach the driving motor connector and the foot control
connector to the printed circuit board A.
5. Attach the case D with the setscrews B.
Be careful not to bind the cords with the cover.
Attach the connector A to the power supply unit.
Attach the ground wire with the setscrew C.
B

17
Replacing electronic components
Thread tension unit
Setscrew A
Thread tension unit
To remove:
1. Remove the belt cover and the top cover (see page 1 and 2).
2. Remove the front cover (see page 5).
3. Disconnect the thread cut detection connector and the
thread tension motor connecter from the printed circuit
board U1 (see page 9).
4. Cut the tie bands and remove the ferrite cores as
necessary.
5. Remove the setscrews (A) and (B).
Remove the thread tension (unit).
To attach:
1. Follow the above procedure in reverse.
2. Check the upper thread tension (see page 26).
Setscrew B

18
Hexagonal socket screw (4 x 6)
Setscrew (B) Threaded hole
Zigzag foot A
0.8 – 0.9 mm
The surface of
needle plate
Feed dog teeth
Adjusting screw
Setscrew (A) Nut
Presser foot lifter button
Start/Stop button
Reverse
stitch button
⇒
Mechanical adjustment
Feed dog height
The highest position of the feed dog should be between 0.80 and 0.90 mm from the surface of the needle plate.
1. Attach the zigzag foot A. Remove the bed cover
(see page 3).
2. Turn the power switch ON while pressing the Start/Stop
button and the Reverse stitch button to enter the factory
setting mode.
Press "Feed Dog" key. The presser foot pressure value will
be set at "Auto +4", and the stitch length value will be set
at "5.0" automatically.
3. Press the presser foot lifter button to lower the presser
foot.
4. Turn the handwheel toward you to raise the feed dog at its
highest position.
5. Loosen the setscrew (A).
6. Loosen the nut. Turn the adjusting screw to adjust the feed
dog hight.
The highest position of the feed dog should be between
0.80 and 0.90 from the surface of the needle plate.
7. Tighten the nut and setscrew (A).
8. Be sure that the feed dog teeth are pararell with the
surface of the needle plate. If not, follow the adjustment
procedure below.
Feed dog parallel adjustment
1. Prepare the hexagonal socket screw (4x6).
Insert the hexagonal socket screw to the thraded hole, and
turn it until the tip of the screw reaches to the bottom.
2. Loosen the setscrew (B).
3. Turn the hexagonal socket screw and adjust the feed dog
parallel to the needle plate.
4. Tighten the setscrew (D).
5. Remove the hexagonal socket screw.
6. Be sure the feed dog and needle plate are pararell.