Sharp AY-XPC18LR Service Manual page 19

AYXPC18LR
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DB
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Control
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Ei Vs Vo
IC
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IGBT
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29.3. PFC Module Driving Electronics Circuit
The PFC Module circuit operates continuously while the compressor is driving.
The microcomputer detects output DC voltage of the PFC Module circuit with pin 69, and controls to keep the DC voltage to be the target value.
The microcomputer controls so that the input AC current wave form will become a sine wave detecting the input AC voltage of the PFC Module circuit
with pin 71 and detecting AC current wave form with pin 72.
The microcomputer calculates to do above mentioned controls, and outputs the PFC signal (ON/OFF duty control of 20kHz) from pin 89. The PFC
signal is input to IN of PFCM, and the PFC Module circuit operates.
29.4. Output voltage of PFC Module
The output DC voltage of the PFC Module circuit changes within the range from 310V to 370V in proportion to the voltage value of the power supply.
When the power supply voltage is AC 230V, the output DC voltage is DC 330V.
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