ELNA 7200 Service Manual page 26

1.STEP 1 (FUNCTION OF BUZZER, LCD AND LED)
Step1
LCD&LED
Next :
2.STEP 2 (FUNCTION OF BUTTONS)
Step2
Key
Next :
3.STEP 3 (DETECTING SWITCH)
NOT APPLICABLE FOR
THIS MODEL
Step3
Switch
SP FL CL DD
OFF UP OFF
(1)
(2)
(3)
PRESSER
BAR
BOBBIN WINDER
LIFTER
SWITCH
SWITCH
AUTO THREAD
CUTTER SWITCH
DROP FEED
SWITCH
[CORRECT CONDITION]
1) BUZZER SOUNDS
2) LCD AND LED BLINK AT
1 SECOND INTERVAL.
3) SEWING LIGHT TURNS ON.
PRESS THE "CLEAR" BUTTON TO
C
PROCEED TO THE NEXT STEP.
[CORRECT CONDITION]
PRESS ALL OF THE BUTTONS ON
THE FRONT COVER. (PRESS THE
BUTTON "C" AT LAST.)
EACH TIME A BUTTON IS
PRESSED, THE NAME OF THE
BUTTON APPEARS ON THE LCD.
C
PRESS "CLEAR" BUTTON TO
PROCEED TO THE NEXT STEP
[CORRECT CONDITION]
TD
(1) BOBBIN WINDING SWITCH (SP)
BOBBIN WINDER STOPPER AT LEFT:ON
OFF
BOBBIN WINDER STOPPER AT RIGHT:OFF
(2) PRESSER BAR LIFTER SWITCH (FL)
UP
PRESSER FOOT IS UP POSITION:UP
PRESSER FOOT IS DOWN POSITION: DOWN
(4)
AUTO THREAD CUTTER SWITCH
(3) AUTO THREAD CUTTER SWITCH
(CL)
DRIVING ARM AT UP POSITION:
OFF
DRIVING ARM AT DOWN POSITION:
ON
(4) DROP FEED SWITCH (DD)
LEVER AT THE LEFT:
LEVER AT THE RIGHT:
[FAULTY CONDITION]
BUZZER DOES NOT SOUND.
THE STEP 1 SCREEN DOES NOT
APPEAR.
LCD AND LED DO NOT BLINK.
–REMEDY–
A) TURN THE LCD BRIGHTNESS
ADJUSTING DIAL CLOCKWISE OR
COUNTERCLOCKWISE.
B) REPLACE CIRCUIT BOARDS, F, K,
OR A.
[FAULTY CONDITION]
THE NAME OF THE BUTTON DOES
NOT APPEAR AND LCD CONTINUES
TO INDICATE.
–REMEDY–
REPLACE CIRCUIT BOARDS F, K OR
A.
[FAULTY CONDITION]
THE DISPLAY DOES NOT CHANGE
OR IS REVERSED.
–REMEDY–
ADJUST THE POSITION OF THE
SWITCHES, OR REPLACE A SWITCH
OR CIRCUIT BOARD A.
UP
DOWN
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7200