Epson EPL-5700L Service Manual download pdf (Page 22)

EPL-5700L/5700i Revision A

OPERATING PRINCIPLES ELECTRIC CIRCUIT 22

2.2 ELECTRIC CIRCUIT

Since the Electric Circuit of this printer is basically the same as that of EPL-

5700, this section explains only about the Main Control Board and its

related parts.

2.2.1 Operating Principles of Controller

The C292 Main Board, which functions as a controller of the printer,

consists of the Main Controller and the Engine Controller.

Figure 2-1. C292 Main Board

The Main Controller processes print data sent from the host computer and

generates video signal.

The Engine Controller receives video signal from the Main Controller and

drives the engine to print.

FUNCTIONS OF THE MAIN CONTROLLER

Communication with the host computer (receiving print data and

sending status).

Processing the print data (analyzing command and generating video

signal).

Sending the video signal to the Engine Controller.

Monitoring panel or switch conditions.

FUNCTIONS OF THE ENGINE CONTROLLER

Receiving the video signal and sending engine status.

Monitoring sensors.

Controlling the optional lower cassette.

Block diagram of the C292 Main Board and function of each device are

shown on the following page.

RAMSIMM (CN1)

DRAM

JP1

ROM

CPU

Video (CN3)

CPU

SLC

TUSB

1284DRIVER

USB I/F

Parallel I/F

Engine Controller

Main Controller

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Epson EPL-5700L Service Manual Page 22