20
DC4030P
CORRECT RESULTS
* Beep sounds when the buttons are
pressed.
* LED displays " 8.8", and blinks in 1-sec.
Intervals.
LED displays "Ld", and LEDs blink in
1-sec. Intervals.
The pattern selector buttons blink column
by column.
The start/stop button lights in green and
red alternatively.
* LED indicates "--".
* Button number is displayed when the
button is pressed.
* LED indicates "II".
(At left position)
(At right position)
* LED indicates "UP".
(At up position)
(At down position)
SELF DIAGNOSTIC TESTS
STEP AND
ITEMS TO
CHECK
01)
7 - s e g m e n t
LED
02)
Mode LED
03)
Switch
04)
Bobbin
winder
switch
05)
Presser foot
lifter switch
PROCEDURE
Turn on the power switch while
simultanously pressing the needle up/
down button and the start/stop button.
Press the start/stop button five times to
select menu item "6".
Press the needle up/down button: The
LED indicates "01" for one second.
If you don't press the reverse button
within 2.5 seconds, the machine
automatically reverts to normal sewing
mode.
Press needle up/down button, LED
displays "02" for one second.
Press needle up/down button, LED
displays
"
03
"
for one second.
Press buttons 01 to 20.
Press needle up/down button, LED
displays "04" for one second.
* Move the bobbin winder spindle to
the right.
* Return it to the left.
Press needle up/down button, LED
displays "05" for one second.
DEFECTIVE RESULTS
* No beep sound.
* Does not enter self-diag-
nostic mode.
* LED does not blink on or
off.
1. Replace board "A".
* LED does not blink.
1. Replace board "A".
* LED display is different from
that shown to the left.
1. Replace board "A".
* LED display is different from
that shown to the left.
1. A d j u s t b o b b i n w i n d e r
switch position.
2. Replace bobbin winder
switch.
3. Replace board "A".
* LED display is different from
that shown to the left.
1. Adjust presser foot lifter
switch position.
2. Replace bobbin winder
switch.
3. Replace board "A".
LED
LED
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16 17
18 19
20
LED
