Epson LX-86TM Spécifications télécharger pdf (Page 35)

REV.-A

2.3 POWER SUPPLY CIRCUIT

This section describes the operation of the

ROC

filter unit

and

regulator

circuit on the

ROCX

board.

Figure 2-2 shows the block diagram of the power supply circuit.

Table 2-1 shows output voltages and

their applications.

---—-

- -— -

------q

_-_. ---------- —----

-----

Power

r-l

SwNch

Filter

Circuit

—

2.3.1

Power

Trans-

Full-Wave

+ 24VDC

Rectifier

Switching

:AC1

and

Regulator

Smoothing Circuit

O GP

circuit

1AC2

—

Switching

5VOC

Regulator

Circuit

‘

GND

-—-----——-

—

I :

—1

ROC

Filter Unit

— -t

Half-Wave

+ 12V

Rectifier

Circuit

GND

12VAC

O 12VAC

k- —-. -------------------

ROCX

Board

Fig. 2-2. Power Supply Circuit Block Diagram

Table 2-1. Voltage Types and Applications

Power Voltage

Application

+ 24 VDC-GP

Printhead common voltage

Paper feed motor drive voltage

Carriage motor drive voltage

Optional interface board

VDC-GND Logic circuit

Paper feed motor hold voltage

Carriage motor hold voltage

Control panel power

Optional interface board

+ 12VDC-GND Optional interface board

12V AC

Optional interface board

ROC Filter Unit

The

ROC

filter unit consists of an AC power cord (or AC power inlet), power switch, fuse, filter circuit,

and power transformer. The AC power cord, AC power inlet, fuse, and power transformer differ

depending on the power supply voltage. Three kinds of

ROC

filter units, for 120 V, 220 V, and 240 V,

are available.

2-3

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