Epson FX 890 - B/W Dot-matrix Printer - 2.1 MAIN COMPONENTS

FX-1180/FX-880 Service Manual
Chapter 2 Operating Principles
Rev. B
2-1
2.1 MAIN COMPONENTS
This printer is divided into several main components for easy removal and repair. The main
components are :
 C229MAIN: Control board
 C229PSB/PSE/PSH: Power supply board
 C229PNL: Operation panel board
 M-3J60/3J10: Printer mechanism for FX-1180/FX-880
 Housing: Upper case, Lower case, Rear sheet guide, Knob, Printer cover
2.1.1 C229MAIN Board
The C229MAIN board consists of CPU TMP96C141AF (IC3), gate array E05B50 (IC2), EEPROM
AT93C46 (IC4), 1/4M PSRAM (IC5), 2/4M PROM (IC7), driver elements, and so on.
CN3
P F M o to r D riv e r IC
C R M o to r D riv e IC G a te a rra y
E05B 50
Print H ead D river
EEPRO M
PSRAM
PRO M
CPU
Figure 2-1 . C229MAIN Component
2.1.2 C229PSB/PSE/PSH Board
The C229 PSB/PSE power supply board consists of Transformer, Switching FET, Regulator IC,
Diode bridge, Fuse, Photo-coupler, and so on.
Transform er
R e g u la to r IC
CN1
CN2
Switching FET
Fuse
D iode B ridge
Photo-coupler
Figure 2-2. C229PSB/PSE/PSH Component