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STEP AND
ITEMS TO
PROCEDURE
CHECK
Attach the foot control to the
08)
machine.
FOOT
CONTROL
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.
09)
Shift the slide volume from left to
SLIDE
right, then return to the left.
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.
THREAD
Press the needle up/down button.
TENSION
RELEASE
If the result is correct condition,
SOLENOID
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
LCD displays "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 "09".
Buzzer sounds at rightmost or leftmost
position.
LCD displays "10".
Machine runs slow, then fast, and the
needle bar stops at its highest position.
LCD displays "OK".
LCD displays "11" and "–off".
Press the needle up/down button to
switch the solenoid on or off.
[ON]
Buzzer sounds and the thread
tension disk opens, and LCD displays
"--on" while the thread tension disk
opens. The thread tension disk will be
closed automatically 5 seconds after
the thread tension released.
[OFF]
Buzzer sounds and the thread tension
disc closes, and LCD displays "–off".
28
CORRECT CONDITION
Foot control
symbol
DEFECTIVE CONDITION
The foot control symbol
does not appear.
Buzzer does not sound.
–REMEDY–
Replace the foot control.
Replace the machine
socket (foot control socket).
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.
LCD displays "NG".
–REMEDY–
Replace the DC motor.
Replace the printed circuit
board A.
The thread tension disk does
not open.
–REMEDY–
Replace the solenoid.
Replace the printed circuit
board A.
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