Janome Skyline S5, Service Manual

31

LCD displays “04” and “BO”.
When the bobbin winder spindle is 

moved to the right, buzzer sounds and 

the bobbin symbol appears on LCD.
When the bobbin winder spindle is 

moved to the left, buzzer sounds and the 

bobbin symbol disappears.

CORRECT CONDITION

Sewing lamp and LCD backlight lit. 

LCD displays “----”.

01)
FUNCTION OF 
LCD, BUzzER 
AND LAMP

PROCEDURE

Turn on the power switch while 
simultaneously pressing the 
needle up/down button and 
thread cutter button.
Press “1” key.
If the result is correct condition, 
press the start/stop button to 
proceed the next step.
If the result is defective condition, 
press the reverse stitch button to 
proceed the next step.

DEFECTIVE CONDITION

“1” button is not responding.

Sewing lamp does not lit.

LCD backlight does not lit.

LCD does not display.

Buzzer does not sound. 

Machine lamp does not 

turned on.

LCD does not display any 

symbols or not in order.

–REMEDY–

Calibrate the key position  

or replace the touch panel.

Replace the circuit board A.

Replace the machine lamp.

Replace the touch panel.

Replace the circuit board F.

Buzzer sounds.

LCD displays symbols and numbers 

and blinks. 

Start/stop button blinks in red and 

green.

LCD displays “02” and “KEY”.
Buzzer sounds when button is 

pressed. Button number is displayed 

when the button is pressed.

LCD displays “F1” when button 1 is pressed.
LCD displays “F2” when button 2 is pressed.
LCD displays “F3” when button 3 is pressed.

LCD displays “03” and “BH”.
When the buttonhole lever is pulled, 

buzzer sounds and LCD displays BH 

symbol.

BH symbol

Bobbin symbol

Press buttons 1– 3.

If the result is correct condition, 

press the start/stop button to 

proceed the next step.
If the result is defective condition, 

press the reverse stitch button to 

proceed the next step.

Lower the buttonhole lever.

Move the buttonhole lever back 

and forth.
If the result is correct condition, 

press the start/stop button to 

proceed the next step.
If the result is defective condition, 

press the reverse stitch button to 

proceed the next step.

Move the bobbin winder spindle 

to the right. 

Return it to the left.
If the result is correct condition, 

press the start/stop button to 

proceed the next step.
If the result is defective condition, 

press the reverse stitch button to 

proceed the next step.

02)
BUTTON

03)
BUTTONHOLE 
SENSOR

STEP AND 

ITEMS T

O 

CHECk

04)
BOBBIN 
WINDER 
SWITCH

When the buttonhole lever is pushed, 

buzzer sounds and LCD displays BH 

symbol.

Buzzer does not sound.
LCD does not display the 
number correctly.

–REMEDY–
Replace the circuit board A.
Replace the circuit board F.

Buzzer does not sound.

BH symbol does not appear.

–REMEDY–

Adjust the BH lever sensor 

position.

Replace the BH lever 

sensor.

Replace the circuit board A.

Buzzer does not sound.

Bobbin symbol is not 

displayed.

–REMEDY–

Adjust the bobbin winder 

switch position.

Replace the bobbin winder 

switch.

Replace the circuit board A.

1

2

3

Diagnosis test