Epson Stylus Pro 3800 - Page 37

Epson Stylus Pro 3800/3800C/3850/3880/3885/3890 Revision C
OPERATING PRINCIPLES Overview 37
MAIN COMPONENT
 Electric Circuit Boards
Figure 2-1. Layout of Electric Circuit Boards
Table 2-1. List of Electric Circuit Boards
Fig. Name Function
Main board
Epson Stylus Pro 3800/3800C/
3850: C635 MAIN
Epson Stylus Pro 3880/3885/
3890: CA61 MAIN
 Communications with host computer
 Receive data processing
 Engine control
 Saves compensation values and various counter
information.
 Generates power voltages used by the logic circuits
from 42 V supplied from the power supply board.
Power supply board
(C635 PSB/PSE)
 Generates power system power voltage 42 V from
the AC power supply
Panel board (C635 PNL)
 Printer operations, various settings
 Shows printer status and various setting values on
the LCD.
 Indicates printer status by the LED.
Sub board (C635 SUB)
Relays connections between the main board and the
following parts:
 PG sensor
 Ink mark sensor
 PW sensor
 Ink change sensor
 CR encoder
 Ink change motor
1
2
3
4
1
2
3
4