Janome 3160QDCT Service Manual page 21

Step and items
to check
05) Raise or lower the preser foot lifter.
If the result is correct condition, press
Presser foot
the start/stop button to proceed the
lifter switch
next step.
If the result is defective condition,
press the reverse stitch button to
proceed the next step.
Turn the handwheel toward you.
06)
Lower the needle bar from its highest
Upper shaft
to its lowest
positioning
position.
sensor
Raise the needle bar from its lowest
position to its highest position.
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.
07) Turn the handwheel toward you.
Zigzag motor
Lower the needle bar from its highest
(Step motor)
to its lowest
position.
Feed motor
Raise the needle bar from its lowest
position to its highest position.
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.
SELF-DIAGNOSTIC TEST
Procedure
LCD displays "SC 05".
Buzzer sounds when presser foot lifter is
raised or lowered.
The presser foot symbol appears when
the foot lifter is lowered.
Presser
foot
symbol
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. (Zigzag 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
19
Defective Condition
Buzzer does not sound.
The presser foot symbol
does not appear when the
presser foot is lowered, or
does not disappear when
the presser foot is raised.
–REMEDY–
Replace the circuit board A.
Replace the presser foot
lifter switch.
Adjust the presser foot lifter
switch position.
Buzzer does not sound.
Stitch width or length
symbol does not appear.
–REMEDY–
Replace the printed circuit board A.
Replace the printed circuit board P.
Zigzag motor does not get default
position.
–REMEDY–
Replace the zigzag motor.
Replace the printed circuit board A.
Feed motor does not get default
position.
–REMEDY–
Replace the feed motor.
Replace the printed circuit board A.