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Epson FX-870/1170 User Manual

Page 136

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Filter Circuit

AC input

Principles of Operation

I

I

I

Full Wave S m o o t h i n g

Smoothing

Circuit

Circuit

. .

Circuit

I ,

Switching

Regulator

Over Current

Control Circuit

- - - - - - - - - - - - - - - -

P h o t o -

V Line

coupler

Detector Circuit

I

V Line

Voltage Overload

Protection Circuit

VDC

4

V D C

Voltage Drop

Protection Circuit

Power

Switch

Figure 6-22. Power Supply Circuit Block Diagram

Epson

6-21

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