ELNA 7200 Service Manual page 28

8. STEP 8
(SOLENOID)
Step8 Solenoid
Sol1 Sol2
OFF OFF
1 2
(1)
(2)
AUTO THREADER CUTTER COVER
9. STEP 9 (STEPPING MOTORS)
(1)
Step9
Stepping Motor
BM Phase
(2)
Step9
Stepping Motor
(3)
Step9
Stepping Motor
FM Phase
[CORRECT CONDITION]
PRESS A NUMBER
CORRESPONDING TO THE
SOLENOIDS
Sol3 1) FOR AUTO-THREAD CUTTER
SET THE NEEDLE BAR AT THE
OFF
LOWEST POSITION.
3
PRESS THE BUTTON(1)
WHEN THE DRIVING ARM IS AT:
UP:
DOWN:
(3)
2) FOR BOBBIN SPINNING IDLE
PREVENSION LEVER REMOVE
THE HOOK COVER PLATE.
PRESS THE BUTTON (2)
WHEN THE LEVER IS AT THE:
RIGHT:
LEFT:
3) FOR UPPER SHAFT
SET THE NEEDLE BAR AT THE HIGHEST POSITION.
WHEN THE ACTIVATING ROD IS AT THE POSITION OF:
UP:
DOWN:
PRESS "CLEAR" BUTTON TO PROCEED TO THE NEXT STEP.
[CORRECT CONDITION]
1) WHEN THE ENTER BUTTON
IS PRESSED WITH THE NEEDLE
BAR AT "UP" POSITION, THE
NEEDLE BAR VIBRATES AND THE
NEEDLE DROP IS SET AT CENTER
ENT
POSITION. (ZIGZAG STEPPING
MOTOR)
2) WHEN THE ENTER BUTTON
IS PRESSED WITH THE NEEDLE
BAR AT "MIDDLE" POSITION, THE
TENSION DISC IS CLOSED.
(TENSION STEPPING MOTOR)
ENT
3) WHEN THE ENTER BUTTON
IS PRESSED WITH THE NEEDLE
BAR AT "DOWN " POSITION, THE
FEED DOG VIBRATES AND THE
FEED DOG IS IN THE MIDDLE OF
ITS TRAVEL (FEED STEPPING
MOTOR)
ENT
PRESS THE "CLEAR" BUTTON TO
PROCEED TO THE NEXT STEP.
OFF
ON
OFF
ON
OFF
ON
27
[FAULTY CONDITION]
THE DRIVING MECHANISM DOES
NOT FUNCTION.
–REMEDY–
CHECK IF THE CONNECTING
PARTS MOVES PROPERLY.
REPLACE A SOLENOID OR THE
CIRCUIT BOARD A.
[FAULTY CONDITION]
THE DISPLAY SHOWS "E1 Error",
"E2 Error" OR E3 Error".
–REMEDY–
CHECK THE STEPPING MOTORS
IF THEY ROTATE SMOOTHLY.
REPLACE THE STEPPING MOTOR.
REPLACE THE CIRCUIT BOARD A.
7200