Janome MC7700 QCP Service Manual page 39

STEP 1 (LCD DISPLAY)
STEP 2 (FUNCTION OF BUTTONS)
STEP 3 (DETECTING SWITCH)
[CORRECT CONDITION]
1) LCD DISPLAY AND LED BLINK
AT 1 SECOND INTERVAL.
2) SEWING LIGHT TURNS ON.
PRESS THE REVERSE STITCH
BUTTON TO PROCEED TO THE
NEXT STEP.
[CORRECT CONDITION]
EACH TIME A BUTTON OR KEY IS
PRESSED, THE NAME OF THE
BUTTON OR KEY APPEARS ON
THE LCD.
PRESS ALL OF THE BUTTONS
AND KEYS ON THE FRONT
COVER. (PRESS THE REVERSE
STITCH BUTTON AT LAST.)
PRESS THE REVERSE STITCH
BUTTON TO PROCEED TO THE
NEXT STEP.
[CORRECT CONDITION]
(1) BOBBIN WINDING SWITCH (Spool)
BOBBIN WINDER SPINDLE AT LEFT:
BOBBIN WINDER SPINDLE AT RIGHT:
(2) PRESSER BAR LIFTER SWITCH (Foot Lift)
PRESSER FOOT IS EXTRA
LIFTED POSITION:UP
PRESSER FOOT IS UP POSITION:
PRESSER FOOT IS DOWN POSITION:
(3) EXTRA BAR LIFTER SWITCH (Assist Lift)
PRESSER FOOT IS EXTRA
LIFTED POSITION:UP
PRESSER FOOT IS UP POSITION:
PRESSER FOOT IS DOWN POSITION:
(4) CENTER NEEDLE POSITION
SENSOR (M Line)
NEEDLE BAR IS CENTERED:
NEEDLE BAR IS NOT CENTERED:
(5) AUTOMATIC PLATE CONVERTER SWITCH
(Needle plate)
AUTOMATIC PLATE CONVERTER IS OPENED: ON
AUTOMATIC PLATE CONVERTER IS CLOSED: OFF
(6) BUTTONHOLE LEVER SWITCH (BH Lever)
BUTTONHOLE LEVER IS AT BACK:
BUTTONHOLE LEVER IS RELEASED:
(7) DROP FEED SWITCH (Feed Dog)
LEVER AT THE RIGHT:
LEVER AT THE LEFT:
37
[FAULTY CONDITION]
THE STEP 1 SCREEN DOES NOT
APPEAR.
LCD OR LED DOES NOT BLINK.
–REMEDY–
REPLACE CIRCUIT BOARDS
F OR A.
[FAULTY CONDITION]
THE NAME OF THE BUTTON
DOES NOT APPEAR.
–REMEDY–
REPLACE CIRCUIT BOARDS F OR
A.
[FAULTY CONDITION]
THE DISPLAY DOES NOT CHANGE
OFF
OR IS REVERSED.
ON
–REMEDY–
ADJUST THE POSITION OF THE
SWITCHES, REPLACE SWITCHES
OR REPLACE THE CIRCUIT
UP
BOARD A.
DOWN
DOWN
DOWN
ON
OFF
H
L
UP
DOWN