EPSON Stylus Pro 7400/7800/9400/9800 Revision B
Operating Principles Print Mechanism Components 149
2.2 Print Mechanism Components
The major electrical parts used in the printer mechanism of this printer are as shown
below. Hereafter, we will explain each printer mechanism focusing on these parts.
Table 2-1. Printer Mechanism Components
Part
Drive
voltage
Explanation
Refer
to
Print Mechanism (Print Head) (p.150)
Print head ---
The number of nozzles: 180
Nozzle x 8 colors
p.150
Head thermistor +3.3V Incorporated in the print head ---
Carriage (CR) Mechanism (p.151)
CR motor +42V DC motor
p.152
CR HP sensor +3.3V
Transmission type photo-
interrupter
p.152
CR encoder sensor +5V Linear encoder (180LPI) p.152
Ink mark sensor
(Detection in a direction parallel to
the Carriage movement)
+3.3V/+5V Reflection type photo-interrupter
p.152
PG HP sensor +3.3V
Transmission type photo-
interrupter
p.154
P EDGE sensor (Paper width
detection)
+3.3V/+5V Reflection type photo-interrupter
p.155
Cutter Solenoid +24V DC solenoid p.159
Paper Feed Assembly (p.160)
PF motor +42V DC motor
p.160
PF encoder sensor +5V Linear encoder (360LPI) ---
Paper suction fans +24V The number of DC blowers: 3
p.161
P Rear sensor
(Paper presence detection)
+3.3V/+5V Reflection type photo-interrupter
p.162
P THICK 1/2 sensor
(Paper thickness)
+3.3V
Transmission type photo-
interrupter
p.162
Release sensor (I/C lever detection) +3.3V Leaf switch ---
Cleaning Mechanism (p.163)
Pump motor +42V DC motor
p.163
Ink pressure motor +42V Stepping motor ---
Regulator solenoid +24V DC solenoid ---
Ink Supply Mechanism (p.165)
Ink cartridge +5V, +3.3V CSIC ---
Maintenance Tank +5V, +3.3V CSIC
p.164
Others (p.166)
Cover sensor
(Front Cover open/close detection)
+3.3V Leaf switch
p.166
MAIN board --- Printer control/drive circuit board p.167
Radiator cooling fan +5V DC brushless fan ---
Take-up motor +24V DC motor ---
Power Supply Circuit Board --- ---
p.168
Table 2-1. Printer Mechanism Components
Part
Drive
voltage
Explanation
Refer
to
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