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7 Repairing the knitting machine
7.4 Eliminating faults in electronics system
7.4.2 Power supply unit
Power supply unit
The LEDs on the power supply unit indicate which voltages are generated
and at which voltage an error occurs. While switching on the main switch,
the lower three LEDs light up immediately, and the +28 V approx. 1 second
later, followed by the +40 V. The order in which the LEDs light up when
switching on may provide information on fault causes.
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