Epson LC-7211 Especificações descarregar pdf (Página 25)

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3. Power Supply Circuit

A ringing choke converter type circuit is used with a dropper type circuit in the power supply unit, fulfilling the input and

output conditions described in the chart below.

Fig. 2-3 Power Supply unit block diagram

Input

110VAC

120VAC

220VAC

230VAC

240VAC



Noise filter

circuit

In rush current

protection

circuit

Rectifier

circuit

Switching

section

(Transistor Q1)

Ringing

choke

converter

Dropper

circuit

Voltage

reference

Control

circuit

Transformer T1

PC1

Photo-Coupler

Output

33V DC

Output

5V DC

Voltage Range Max. Current Output Service Circuit Type

Input

110VAC, 120VAC 1.0 A

220VAC to 240VAC 0.6 A

5 VDC ±5% 0.4 A Dropper

33 VDC ±5% 1.25A Ringing choke

converter.

For logic circuit

drive, for motor

holding.

For print head

drive, for motor

drive.

Output

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 107 108

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