Janome NH40 Service Manual page 25

Step and items
to check
05)
Not applicable
for this model
Turn the handwheel toward you.
06)
Lower the needle bar from its highest
Upper shaft
to its lowest position.
positioning
Raise the needle bar from its lowest
sensor
position to its highest position.
If the result is correct condition, press
the reverse button to proceed the next
step.
If the result is defective condition,
press the needle up/down button to
proceed the next step.
Turn the handwheel toward you.
07)
Lower the needle bar from its highest
Zigzag motor
to its lowest position.
(Step motor)
Press the ring button (up) mark.
Feed motor
Raise the needle bar from its lowest
position to its highest position.
Press the ring button (up) mark.
If the result is correct condition, press
the reverse button to proceed the next
step.
If the result is defective condition,
press the needle up/down button to
proceed the next step.
Procedure
LCD displays "SC 06".
Turn the handwheel.
LCD displays stitch width symbol when
the needle bar is at zigzag phase.
LCD displays stitch length symbol when
the needle bar is at feed phase.
LCD displays "SC 07".
LCD displays stitch width symbol when
the needle bar is at middle position. (Zig-
zag motor get default position.)
LCD displays stitch length symbol when
feed motor gets default position.
Correct Condition
Stitch width
symbol
Stitch length
symbol
Stitch width
symbol
Stitch length
symbol
23
Defective Condition
Buzzer does not sound.
Stitch width or length symbol
does not appear.
–REMEDY–
Replace the circuit board A.
Replace the circuit board P.
Zigzag motor does not get
default position.
–REMEDY–
Replace the zigzag motor.
Replace the circuit board A.
Feed motor does not get
default position.
–REMEDY–
Replace the feed motor.
Replace the circuit board A.