24
Step and items
to check
07)
Upper shaft
sensor
08)
Sewing speed
sensor
09)
Slide volume
10)
Foot control
11)
Zigzag motor
Feed motor
11)
DC motor
Procedure
Press the needle up/down button,
LED displays "07" for one second.
Turn the handwheel toward you to
raise and lower the needle to its
highest and lowest position.
Press the needle up/down button,
LED displays "08" for one second.
Turn the handwheel clockwise by
hand and check the counter value
on the LED.
(The LED blinks to indicate a
counter value of 100.)
Press the needle up/down button,
LED displays "09" for one second.
Slide the speed control lever from
left to the right, then return it to
left.
Press the needle up/down button,
LED displays "10" for one second.
Depress the foot control down
all the way and releases it.
Press the needle up/down button,
LED displays "11" for one second.
Press the start/stop button.
Turn the handwheel toward you
to lower the needle to its lowest
position, then press the
start/stop button.
Press the needle up/down button,
LED displays "12" for one second.
Press foot control.
Correct Condition
When the needle is at
the highest position, LED
displays "H.L".
When the needle is at
the lowest position, LED
displays "L.L".
When the needle is
halfway, LED displays
"L.L".
LED displays "00" first and
the indicated value
increases as you turn the
handwheel. (When the
value reaches 100, it will
return to "00" and one
mode LED light up. For
example, 2 mode LEDs
and "78" means "278".)
The maximum value
should be 370 to 390.
When the speed control lever is at the
left, LED displays "00". The indicated
value (hexadecimal)
increase as you move the
speed control lever to the
right, and finally it shows
"FF" when the lever reaches the
right-most position.
When the foot control is not depressed,
LED should display "F0" to
"FF" (hexadecimal value).
When the foot control is fully
depressed, LED should
display "05" to "2F". When the
foot control is disconnected,
LED should show "00" to "04".
LED displays "bS".
Zigzag motor is set to
the initial position.
(Needle centered)
LED displays "FS".
Feed motor is set to
the initial position.
(Stitch length: 0)
LED displays "bc".
Machine runs at the speed set by the
speed control lever.
Full left: 80 spm.
Full right: 650 spm.
Defective condition
LED display is different from that
shown to the left.
1. Adjust upper shaft shield plate.
2. Replace upper shaft sensor.
3. Replace A-board.
LED display is different from that
shown to the left.
1. Replace DC motor.
2. Replace A-board.
LED display is different from that
shown to the left.
1. Replace the slide volume.
2. Replace A-board.
LED display is different from that
shown to the left.
1. Replace the foot control.
2. Replace machine socket.
3. Replace A-board.
LED display is different from that
shown to the left.
If LED displays "E1",
replace the zigzag
motor or A-board.
LED display is different from that
shown to the left.
If LED displays "E2",
replace the feed
motor or A-board.
LED display is different from that
shown to the left.
Machine does not
run, LED displays "Lo".
1. Replace DC motor.
2. Replace A-board.
After all tests have been completed, turn the power switch off.
