21
CORRECT CONDITION
LCD displays “SC 08--”.
STEP AND
ITEMS TO
CHECK
08)
FOOT
CONTROL
PROCEDURE
Attach the foot control to the
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.
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 circuit board A.
Shift the slide volume from left to
right, then return 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.
09)
SLIDE
VOLUME
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.
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--”.
10)
DC MOTOR
Buzzer sounds at rightmost or leftmost
position.
LCD displays “SC 10--”.
Buzzer does not sound.
–REMEDY–
Replace the slide volume.
Replace the circuit board A.
The machine motor does
not start.
The motor stops
immediately.
The motor runs unstable.
–REMEDY–
Replace the DC motor.
Replace the circuit board A.
SELF-DIAGNOSTIC TEST
Machine runs slow, then fast, and the
needle bar stops at its highest position.
11)
THREAD
TENSION
RELEASE
SOLENOID
Foot control
symbol
Not applicable for this machine.
Press the start/stop button to
proceed the next step.
LCD displays “SC 11of”.
LCD displays “SC 12--”.
12)
THREAD
CUTTER
MOTOR,
THREAD
CUTTER
SOLENOID
Not applicable for this machine.
Press the start/stop button to
proceed the next step.
