D
A4
CORRECT CONDITION
LCD displays “08” and “FC”.
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 or released.
Buzzer sounds when the foot control is
connected or disconnected.
LCD displays “09” and “Slide”.
10)
DC MOTOR
Buzzer sounds and “ ” mark appears at
the leftmost position.
Buzzer sounds and “ ” mark appears at
the rightmost position.
Buzzer does not sound.
The “ ” marks appears
in opposite way.
The “ ” marks does not
appear.
–REMEDY–
Replace the circuit board
A.
The machine motor does
not start.
The motor runs unstable.
–REMEDY–
Replace the DC motor.
Replace the circuit board
A.
LCD displays “10” and “DC”.
Machine runs slow, then fast, and the
needle bar stops at its highest position.
11)
THREAD
TENSION
RELEASE
SOLENOID
Foot control
symbol
Lower the presser foot.
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.
LCD displays “11”, “SO” 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”.
The Thread tension disk
does not open.
–REMEDY–
Replace the solenoid.
Replace the circuit board
A.
Содержание HQ Stitch 710
Страница 1: ...Service Manual 05 29 18 HQ Stitch 710...
Страница 18: ...Oil Put a drop of oil on the following 1 The presser bar at the bottom bushing inside the left hinged cover 15...
Страница 24: ...Oil Put a drop of oil on the following 7 The hook felt under the needle plate and the bobbin case 21...
Страница 92: ...Appendix II Diagnostic Tests 89...