25
7330
STEP
12)
DC motor
OPERATION
CORECT CONDITION DEFECTIVE CONDITION
THE END OF TEST: All of test is finished, turn off the power switch.
Press needle up/down button, led
indicates "12" for one swcond.
* Press foot control.
* Led indicates "dc".
* Machine runs at the speed set by
the speed control lever.
Full left: 80 ~100 SPM
Full right: 800 ~840 SPM
Machine does not run, led
displays "Lo".
1. Replace DC motor.
2. Replace board "A".
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