DAEWOO ELECTRONICS DQD-21OOD, Руководство по обслуживанию

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2) Primary rectification and smoothing circuit
AC voltage passed through AC lnlet is rectified to Brige Rectification Diode D801 and changes to
DC voltage. After that it smooths the Smoothing Condenser C806.
When C806 is charged at first, Resistor R802 intercepts voltage current and protects D801, F801.
Start Resistor R803, R804 supply Control IC VCC terminal with rectified DC voltage.
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1. POWER SUPPLY OPERATION
1) AC input and EMI FILTER
AC inlet consists of Line Filter, X-Cap, Y-Cap, Varister. Line Filter(L801, L802), X-Cap(C803,
C888), Y-Cap(C801) belong to EMI Filter section. They decrease noise to get into and out of AC
Line.
CIRCUIT OPERATIONAL DESCRIPTION
POWER SECTION
Picture 1. [AC Input section]
Picture 2 [Rectification, smoothing and starting circuit]
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