25
MODEL 520
STEP
12)
DC motor
OPERATION
Press needle up/down button,
led indicates "12" for one
second.
* Press foot control.
CORRECT CONDITION
* Led indicates "dc".
* Machine runs at the speed set by
the speed control lever.
Full left: 80 ~100 SPM
Full right: 800 ~840 SPM
DEFECTIVE CONDITION
Machine does not run, led
displays "Lo".
1.Replace DC motor.
2.Replace board "A".
THE END OF TEST:
All of test is finished, turn off the power switch.
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