Caple C702G Manuel de service télécharger pdf (Page 177)

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8-14. Second Output Rectifying and Smoothing Circuit

The fly-back voltages which are generated at the secondary windings of T651 are rectified by D6L1 and D6M1.

Then, these voltages are smoothed by C6L1, C6L2, C6M1 and C6M2 so that DC voltages are obtained.

The DC voltages are maintained constantly by controlling the ON period duty cycle of MOSFET(internal

IC651) in the second converter circuit.

(Fig.8-15) Second Output Rectifying and smoothing Circuit

8-15. Second Error Detection Amplifier Circuit

The output voltage +20.0V is compared with the reference voltage at the error amplifier IC652.

An error signal is applied to the control circuit via the photocupler PC651.

(Fig.8-16) Second Error Detection Amplifier Circuit

GND

+20.0V

-20.0V

C6L1

C6M1

L6M1

L6L1

C6L2

C6M2

D6L1

D6M1

CONTROL

CIRCUIT

+20.0V

GND

PC651

R662

IC652

R663

R664

R665

C659

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Caple C702G Manuel de service Page 177

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