19
CORRECT CONDITION
SewinglampandLEDbacklightlit.LED
displays“1”.
PresstheMODEkey.
01)
FUNCTION OF
LED, BUZZER
AND LAMP
PROCEDURE
Turnonthepowerswitchwhile
simultaneouslypressingthe
auto-lockbuttonandneedleup/
down button.
Pressthe
MODEkeyto
enterthe
self-diagnosticmode.
Iftheresultiscorrectcondition,
pressthe
MODEkey
toproceed
thenextstep.
Iftheresultisdefectivecondition,
pressthereversestitchbuttonto
proceedthenextstep.
DEFECTIVE CONDITION
Sewing lamp does not lit.
LEDbacklightdoesnotlit.
LEDdoesnotdisplay.
Buzzerdoesnotsound.
LEDdoesnotturnedon.
LEDdoesnotdisplayany
symbolsornotinorder.
–REMEDY–
ReplacethecircuitboardA.
ReplacethecircuitboardL.
Buzzersounds. LEDdisplays
“8.8”as
shown
.
Threeindicatorlightsareon.
LEDdisplaysnothing.
Buzzersoundswhenbuttonispressed.
Buttonnumberisdisplayedwhenthe
followingbuttonsareispressed.
LEDdisplays“1”whenbutton
q
ispressed.
LEDdisplays“2”whenbutton
w
ispressed.
LEDdisplays“5”whenbutton
t
ispressed.
LEDdisplays“6”whenbutton
y
ispressed.
LEDdisplays“7”whenbutton
u
ispressed.
When
q
-
u
arepressed
,LEDdisplays
“b”asshown.
LEDdisplays“3”.
Whenthebobbinwinderspindleismoved
totheright,buzzersoundsandLED
displaysthe3Sasshown.
Pressbuttons1,2,5,6and7.
Iftheresultiscorrectcondition,
pressthe
MODEkey
toproceed
thenextstep.
Iftheresultisdefectivecondition,
pressthereversestitchbuttonto
proceedthenextstep.
Movethebobbinwinderspindle
totheright.
Returnittotheleft.
Iftheresultiscorrectcondition,
pressthe
MODEkey
to
proceedthenextstep.
Iftheresultisdefectivecondition,
pressthereversestitchbuttonto
proceedthenextstep.
02)
BUTTON
03)
BOBBIN
WINDER
SWITCH
SELF-DIAGNOSTIC TEST
STEP AND
ITEMS T
O
CHECK
Whenthebobbinwinderspindleismovedto
theleft,buzzersoundsandSdisappears.
LEDdisplays“4_”.
Theunderbarisdisplayedasshown.
Buzzerdoesnotsound.
LEDdoesnotdisplaythe
numbercorrectly.
–REMEDY–
ReplacethecircuitboardA.
Buzzerdoesnotsound.
Bobbinsymbolisnot
displayed.
–REMEDY–
Adjustthebobbinwinder
switchposition.
Replacethebobbinwinder
switch.
ReplacethecircuitboardA.
q
w
tyu
04)
PRESSER
FOOT
LIFTER
SWITCH
Notapplicableforthismodel.
PresstheMODEkeytoproceed
thenextstep.