Electrical Circuit Operating Principles - Epson STYLUS Scan 2000 Service Manual

EPSON Stylus Scan 2000

2.5 Electrical Circuit Operating Principles

EPSON Stylus Scan 2000 contains the following three electric circuit boards.
Main: B101 Main Board
Power Supply: B101 PSB/PSE Board
Panel: B101 PNL Board
Refer to Figure 2-20 for the major connection of the 3 boards and their roles.
Operating Principles
AC Input
Electrical Circuit Operating Principles
+5V/
B101 PSB/ B101 MAIN Board
3.3V
PSE Board
DC
+42VDC
+12VDC
CR HP
Sensor
CR Motor
PE
Sensor
PF Motor
(Pump Motor)
B/CMY Ink
Out Sensor
Thermisto
Nozzle selector
Board
Printhead
Figure 2-20. Electric Circuit layout
Revision A
Ink End
and P-off
time
+5VDC
B101
LED
PNL
ASF Lever
Position Sensor
ASF Motor
CCD sensor
+12VDC
Scanner
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