ELNA 8300 - LEAFLET User manual

SERVICE MANUAL
&
PARTS LIST
MODEL 8300

GENERAL TROUBLE SHOOTING PROCEDURE .................................................................................2
CHANGING EXTERNAL PARTS (1) FACE COVER/TOP COVER ........................................................3
CHANGING EXTERNAL PARTS (2) BELT COVER ...............................................................................4
CHANGING EXTERNAL PARTS (3) BASE COVER ..............................................................................5
CHANGING EXTERNAL PARTS (4) BED COVER/BASE LID(2) ...........................................................6
CHANGING EXTERNAL PARTS (5) BASE UNIT................................................................................... 7
CHANGING EXTERNAL PARTS (6) FRONT COVER ...........................................................................8
CHNAGING EXTERNAL PARTS (7) REAR COVER ..............................................................................9
ADJUSTING NEEDLE DROP POSITION............................................................................................. 10
ADJUSTING HOOK TIMING ................................................................................................................ 11
ADJUSTING NEEDLE BAR HEIGHT ...................................................................................................12
ADJUSTING CLEARANCE BETWEEN NEEDLE AND HOOK ............................................................13
ADJUSTING BACKLASH BETWEEN HOOK DRIVE GEAR AND LOWER SHAFT GEAR .......................................... 14
ADJUSTING HEIGHT OF THE NEEDLE STOP POSITION .................................................................15
ADJUSTING THREAD TENSION .........................................................................................................16
ADJUSTING TENSION RELEASE MECHANISM ................................................................................ 17
CHNAGING THREAD TENSION UNIT ................................................................................................ 18
REPLACING THREADER PLATE AND ADJUSTMENT ....................................................................... 19
REPLACING THREAD CUTTER .................................................................................................... 20–21
ADJUSTING HEIGHT OF EMBROIDERY FOOT P .............................................................................. 22
CONNECTOR CONNECTION DIAGRAM ............................................................................................ 23
REPLACING PRINTED CIRCUIT BOARD A ........................................................................................ 24
REPLACING TOUCH PANEL ............................................................................................................... 25
TOUCH SCREEN CALIBRATION ........................................................................................................26
REPLACING PRINTED CIRCUIT BOARD F ........................................................................................27
ADJUSTING OF THE SOLENOID .......................................................................................................28
ADJUSTING UPPER SHAFT RELEASE CAM AND CLUTCH RELEASE ARM .................................. 29
ADJUSTING THREAD CUTTER SOLENOID....................................................................................... 30
ADJUSTING THREAD CUTTER .......................................................................................................... 31
ADJUSTING THREAD HOLDING SOLENOID ..................................................................................... 32
ADJUSTING THREAD DRAWING LEVER ........................................................................................... 33
ADJUSTING THE PRESSER FOOT LIFTER SENSOR .......................................................................34
ADJUSTING THE REMAINING BOBBIN THREAD LEVEL .................................................................35
REPLACING DC MOTOR AND MOTOR BELT TENSION ADJUSTMENT .......................................... 36
REPLACING CARRIAGE PLATE UNIT ................................................................................................ 37
ADJUSTING X AND Y SENSORS ........................................................................................................ 38
ADJUSTING X AND Y SENSORS (SIMPLE ADJUSTMENT) .............................................................. 39
ADJUSTING X MOTOR GEAR............................................................................................................. 40
REPLACING SWITCHING POWER SUPPLY ......................................................................................41
OILING ..................................................................................................................................................42
PARTS LIST .................................................................................................................................... 43–68
TABLE OF CONTENTS

1
Model 8300
Safety Precautions and Important Notes
Warning!
Disconnect the mains plug from the power outlet before making any adjustments to the
machine or replacing the parts.
Wait about 30 seconds after disconnecting the plug (capacitor discharge).
1. 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.
2. When servicing, always use the original accessories, either those delivered with the machine or purchased
afterwards. These are the following:
Mains cable, Foot control, Buttonhole foot, Bobbin case with bobbin, other accessories.
3. Electronic parts and components may only be dispatched in their original packaging, with factory equipped
documentation.
4. This manual subject to revisions without notice. The recipients is responsible for updating the information provided
by FGAG, BERNINA, Steckborn, Switzerland.
Protection of Electrical Components
against Electrostatic Discharge
When carrying out service work on computerized machines, or when handling circuit
boards, the service technicians must be in an ESD protected environment.
1. The surface of the workbench should be conductive so that the electrostatic charges are conducted away but it
should have enough resistance to prevent short-circuiting and grounding of parts laid out on the bench.
2. The service technicians should wear wristbands connected to the bench surface. To ensure the safety of personnel,
a resistance of approx. 1 M ohm must be connected in series with the conductive wristband.
3. Electronic parts and components may only be dispatched in their original packaging, with factory equipped
documentation.

2
Model 8300
GENERAL TROUBLE SHOOTING PROCEDURE
N.G.
O.K.
O.K.
N.G.
ELECTRIC QUICK CHECK
END
CORRECT IT
START
BASIC CHECK
MECHANICAL ELECTRICAL CAN’T JUDGE
ELECTRIC QUICK CHECK
ADJUSTMENT
SEWING CHECK
REPLACE PARTS
IS NEEDLE SET OK?
IS POWER SUPPLY OK?
IS THREADING OK?

3
Model 8300
Changing External Parts (1) Face Cover / Top cover
Replacing th face cover
To remove:
1 Remove the Screw .
2 Lift the habdle up and remove the Screw .
3 Remove the top cover.
To attach:
2. Follow the above procedure in reverse.
Replacing th top cover
Top Cover
Handle
To remove:
1. Remove the Cap and Screw and remove
the Face Cover .
Cap
Screw
Face cover
To attach:
2. Follow the above procedure in reverse.
AB
C
A
B
C
A
B
C
B
C
B
C

4
Model 8300
Changing External Parts (2) Belt Cover
Replacing the belt cover
To remove:
1. Remove the Cap and Screw .
2. Raise the Carrying Handle and remove the Screw .
3. Lay the machine on its back and remove Screws
(2 pcs. gold color), then remove the Belt cover .
Cap
Screw
Screw
Screw
Belt cover
To attach:
4. Attach the Belt Cover with Screws - .
5. Attach the Cap .
Handle
AB
C
D
E
E
D
C
B
A
B D
A
B
A
E
C
D
D

5
Model 8300
Changing External Parts (3) Base Cover
Replacing the base cover
To remove:
1. Remove Screws (4 pieces) to remove the base
cover .
Screws
Base cover
To attach:
2. Follow the above procedure in reverse.
A
B
A
B
A
B
A
AA

6
Model 8300
Changing External Parts (4) Bed Cover / Base Lid (2)
Replacing the bed cover
To remove:
1. Remove the base cover. (See page 5)
2. Remove Screw (2 pcs.), and remove the Base
Lid .
3. Remove Screw (2 pcs.), and remove the Bed
cover .
Screw
Base lid
Screw
Bed cover
To attach:
4. Follow the above procedure in reverse.
Replacing base Lid (2)
To remove:
1. Remove Screws (4 pieces), and remove the
Lid (2) .
Screw
Base lid (2)
To attach:
2. Follow the above procedure in reverse.
A
B
C
D
C
B
A
A
B
B
A
A
B
C
A
A
A
B
DD

7
Model 8300
Changing External Parts (5) Base Unit
Base
To remove:
1. Remove the Belt cover. (See page 4)
2. Remove Setscrew (4 pcs.), and remove
the base unit .
3. Remove the X-Motor Connector and Y-Motor
Connector from the printed circuit board “A”.
Joint bosses
Y-motor connector (White)
X-motor connector (Blue)
To attach:
4. Attach the X, Y-Motor Connectors , into
the printed circuit board “A”.
5. Insert the X, Y-Motor Cords between the printed
cuircuit board “A” and Arm. Be sure the cords
are not caught between the Joint Bosses of
the arm and base. Tighten Screws (4 pieces)
temporarily.
Joint boss
6. Attach the Extension (Accessory) table .
Extension table (Accessory)
7. Tighten Screws while aligning the extension
table, base unit and free Arm.
Note: Attach the embroidery hoop with the template
on the carriage. Check the needle drop posi
tion against the template.
8. Attach the belt cover.
A
9
8
B
8
9
A
A
8
9
B
89
B
A
B
C
C
A
C
A

8
Model 8300
To remove:
1. Remove the face cover, belt cover, base cover and
top cover. (See pages 3-5).
2. Remove Screw and remove the Arm thread
guide (lower) .
3. Remove Screw .
4. Loosen Screws , 3 turns.
5. Disconnect the each connector and remove the front
cover.
Note: Disengage the Hooks to remove the Front
cover.
Screw
Arm thread guide (Lower)
Screw
Screw
Screw
Hooks (2 spots)
To attach:
6. Follow the above procedure in reverse.
Note: See pages 19 (Diagram) for Connectors
Connection.
Changing External Parts (6) Front Cover
Front cover
A
B
C
A
B
C
D E
D
E
H
H
E
B
A
C
D
F