Epson Stylus Pro 3800 Service Manual page 37

Epson Stylus Pro 3800/3800C/3850/3880/3885/3890
MAIN COMPONENT
Electric Circuit Boards
Table 2-1. List of Electric Circuit Boards
Fig. Name
Main board
Epson Stylus Pro 3800/3800C/
3850: C635 MAIN
1
Epson Stylus Pro 3880/3885/
3890: CA61 MAIN
Power supply board
2
(C635 PSB/PSE)
Panel board (C635 PNL)
3
Sub board (C635 SUB)
4
OPERATING PRINCIPLES
Function
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.
Generates power system power voltage 42 V from
the AC power supply
Printer operations, various settings
Shows printer status and various setting values on
the LCD.
Indicates printer status by the LED.
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
2
Figure 2-1. Layout of Electric Circuit Boards
Overview
Revision C
1
4
3
37