Janome 5270QDC Service Manual And Parts List page 29

STEP AND
ITEMS TO
CHECK
05) Move the presser foot lifter up and
PRESSER down.
FOOT LIFTER
If the result is correct condition,
SWITCH
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.
06) Turn the handwheel toward you.
UPPER SHAFT
Lower the needle bar from its
POSITIONING
highest to lowest position.
SENSOR
Raise the needle bar from its
lowest position to 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.
Turn the handwheel toward you.
07)
Raise the needle bar to its highest
ZIGZAG MOTOR
to position (zigzag phase).
(STEP MOTOR)
AND
Press the needle up/down button.
FEED MOTOR
Lower the needle bar from its
highest position to its lowest
position (feed phase).
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.
SELF-DIAGNOSTIC TEST
PROCEDURE CORRECT CONDITION
LCD displays "05".
When the presser foot lifer is lowered,
buzzer sounds and LCD displays
presser foot symbol.
When the buttonhole lever is raised,
buzzer sounds and the presser foot
symbol disappears.
LCD displays "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 "07".
Press the needle up/down button
when LCD displays stitch width
symbol.
The Zigzag motor will be initialized
and get its default position.
Press the needle up/down button
when LCD displays stitch length
symbol.
The feed motor will be initialized
and get its default position.
27
DEFECTIVE CONDITION
Buzzer does not sound.
Presser foot symbol does
not appear.
–REMEDY–
Presser
Adjust the presser foot
foot
lifter switch position.
symbol
Replace the presser foot
lifter switch.
Replace the printed circuit
board A.
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.
Stitch
width
symbol
Stitch
length
symbol
Zigzag motor does not get
default position.
Stitch
Buzzer does not sound.
width
–REMEDY–
symbol
Replace the zigzag motor.
Replace the printed circuit
board A.
Stitch
length
Feed motor does not get
symbol
default position.
Buzzer does not sound.
–REMEDY–
Replace the feed motor.
Replace the printed circuit
board A.