1. Explanation for PWB circuit
1-1. Power circuit
The power circuit includes a Switched Mode Power Supply (SMPS). It consists of a rectifier (BD1 and CE1) converting AC
to DC, a switch (IC2) switching the DC voltage, a transformer, and a feedback circuit (IC3 and IC4).
Caution : Since high voltage (160 Vdc) is maintained at the power terminal, wait at least 3 minutes after unplugging the
appliance to check the voltages to allow the current to dissipate.
Voltage of every part is as follows:
6. EXPLANATION FOR MICOM CIRCUIT
Part VA1 CE1 CE2 CE3 CE4 CE5
Voltage 120 Vac 160 Vdc 14 Vdc 12 Vdc 15.5 Vdc 5 Vdc
The part highlighted in green, are the
components of the Switched Mode
Power Supply
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