Janome 3160QDCT Service Manual page 22

Step and items
to check
08)
Attach the foot control to the
Foot control
sewing machine.
Depress the foot control as far as it
goes, then release it.
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.
Shift the slide volume from left to right,
09)
then return to the left.
Slide volume
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.
10) Press the needle up/down button.
DC motor
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.
11)
Lower the presser foot.
Solenoid
Press the needle up/down button.
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.
12) Turn the handwheel toward you to
Thread cutter raise
motor, the needle bar at its highest position.
Thread cutter Press the needle up/down button.
button
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 08".
The foot control symbol appears when the
foot control is attached.
Buzzer sounds when the foot
control is deeply depressed.
Buzzer sounds when the foot
control is relEased.
LCD displays "SC 09".
Buzzer sounds at right or left position.
LCD displays "SC 10".
Machine runs slow, then fast, and the
needle bar stops at its highest position.
LCD displays "SC 11".
Press the needle up/down position
button to display "on" or "of"(off).
Thread tension disc opens while the
LCD displays "on".
Correct Condition
LCD display "12".
Thread cutter motor wii be initialized.
Press the thread cutter button.
The thread cutter icon will appear and
blink as long as the thread cutter
button is pressed.
20
Defective Condition
The foot control
symbol does not
appear.
Buzzer does not sound.
–REMEDY–
Replace the foot
control.
Replace the switching
regulator.
Replace the printed circuit
board A.
Buzzer does not sound.
–REMEDY–
Replace the printed circuit
board A.
The machine motor does not
start.
The motor stops immediately.
The motor runs
unstable.
–REMEDY–
Replace the DC motor.
Replace the printed circuit
board A.
The thread tension disc does
not open.
–REMEDY–
Replace the solenoid
Replace the circuit board A.
The thread cutter motor does
not work.
Thread cutter symbol does
not appear when the thread
cutter button is pressed.
Thread cutter symbol
appears when the thread
cutter button is not pressed.
–REMEDY–
Replace the thread cutter
motor.
Replace the thread cutter
switch.
Replace the circuit board A.