18
TO ENTER SELF-DIAGNOSTIC MODE:
Preparation:
1.Turnthepowerswitchoff.
2.Movethebobbinwinderspindletotheleft.
3.Raisethefeeddog.
4.Setthespeedcontrollevertotheleft.
5.Removethepresserfootandraisethepresserfootlifter.
6.Turnthehandwheeltowardyoutoraisetheneedletoitshighestposition.
NOTE:
•Becareful:thesewingmachinemaystartrunninginitsownwhileintestmode.
•Turnoffthepowerswitchbeforereplacinganyparts.
•Repeatthediagnostictestuntiltheproblemhasbeenresolved.
To begin:
Turnontheswitch.Ifanyofthefollowingproblemsoccur,taketherecommendedactionsintheorderthey
areshown.
1.Themachinedoesnotrespondwhenthepowerswitchisturnedon:
•Checkeachconnectorconnection.
•Replacetheswitchingregulator(withthemachinesocket).
•ReplacetheprintedcircuitboardA.
2.Thesewingmachinelampdoesnotlightup:
•BesureallconnectorsareconnectedtothecircuitboardLandAproperly(Refertopage23).
•ReplacetheprintedcircuitboardL.
•ReplacetheprintedcircuitboardA.
SELF-DIAGNOSTIC TEST
1. Turnthepowerswitchonwhile
simultaneouslypressingauto-lock
buttonandneedleup/downbutton.
2. TheLEDdisplay
willindicate“
1”.
3. Pressthe
MODEkey
to
enterthe
self-diagnosticmode.