Electrical Circuit Operating Principles - Epson Stylus Color 660 Service Manual

EPSON Stylus Color 440/640/740

2.2 Electrical Circuit Operating Principles

Stylus Color 440/640/740 contains the following three electric circuit
boards.


Electronic Boards for Stylus Color 440 are;
Main: C206 Main-B, C255 Main Board
Power Supply: C206 PSB,PSE Board
Panel: C206 PNL Board


Electronic Boards for Stylus Color 640 are;
Main: C256 Main, Main Board
Power Supply: C206 PSB,PSE Board
Panel: C206 PNL Board


Electronic Boards for Stylus Color 740 are;
Main: C257 Main, Main Board
Power Supply: C257 PSB,PSE Board
Panel: C209 PNL Board
Refer to Figure 2-15 for the major connection of the 3 boards and their
roles.
Chapter 2 Operating Principles
C206 PSB/PSE Board
C257 PSB/PSE Board
+5 V DC
+42 V DC
AC Input
CR Motor
PF MOTOR
(Pump Motor)
Head Drive Board
Figure 2-15. Electric Circuit of Stylus Color 440, 640, 740
Revision A
C206 Main-B
C255 Main
C256 Main
12
11 1
10 2
C257 Main
9
3
8 4
7 5
6
INK END counter
and P-off time
counter
CRHP Sensor
PE Sensor C206 PNL
LED
C209 PNL
BCO/CCO Sensor
ASF Lever
Position Sensor
Thermistor
Print Head
56