Main Components; C293Main Board; C293Psb/Pse Board - Epson LQ-570e Service Manual

EPSON LQ-580

2.1 Main Components

This printer is composed of following main units:
o C293MAIN : Control board
o C293PSB/PSE : Power supply board
o C293PNL : Operation panel board
o M-5T10-100 : Printer mechanism
o Housing : Upper case, Lower case, Rear sheet guide, Knob, Printer cover

2.1.1 C293MAIN Board

The C293MAIN board consists of CPU TMP94C251 (IC7), gate array E05B76NA (IC4),
EEPROM AT93C46 (IC3), PROM (IC8), driver elements, and so on.
Gate Array
E05B76NA
Print Head Driver
Figure 2-1. C293MAIN Component
Operating Principles
EEPROM
CPU
Main Components

2.1.2 C293PSB/PSE Board

The C293 PSB/PSE power supply board consists of Transformer, Switching FET,
Regulator IC, Diode bridge, Fuse, Photo-coupler, and so on.
Regulator IC
Transformer
CN2
Switching FET
Figure 2-2. C293PSB/PSE Component
Revision C
Fuse
CN1
Photo-coupler
47