Epson Stylus Pro 4450 - Printer Mechanism Components

EPSON Stylus Pro 4400/4450/4800/4880/4880C Revision C
Operating Principles Printer Mechanism Components 115
2.2 Printer 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
Description Reference
Printing Mechanism (Print Head) (p.116)
Print Head The number of nozzles:
180 nozzles x 8 rows
p.116
Head Thermistor +3.3V Incorporated in the Print Head –
Ink Supply Mechanism (p.118)
Release Sensor
(I/H lever)
+3.3V Reverse tension switch
(mechanical contact)
p.119
ASF/Pump Motor +42V Stepping motor p.123
Maintenance Tank +3.3V/+5V CSIC p.123
Pump Phase Sensor +3.3V Transmission type photo-interrupter p.123
Carriage (CR) Mechanism (p.125)
CR Motor +42V DC motor p.127
CR_HP Sensor +3.3V Transmission type photo-interrupter p.127
CR Encoder Sensor +5V Linear encoder (180LPI) p.127
Multi Sensor +3.3V Reflection type photo-interrupter p.127
PG/PO Motor +42V Stepping motor p.130
PG Phase Sensor +3.3V Transmission type photo-interrupter p.130
Cutter Solenoid +24V DC solenoid p.131
Paper Feed Mechanism (p.131)
PF Motor +42V DC motor p.133
Suction Fan +24V DC blower fan p.133
PF Encoder Sensor +5V Linear encoder (360LPI) p.133
PE sensor +3.3V Reflection type photo-interrupter p.133
P_THICK_0.3 Sensor
(Paper thickness/
pressure lever)
+3.3V Transmission type photo-interrupter p.133
P_THICK Sensor
(Paper thickness/
pressure lever)
+3.3V/+5V Transmission type photo-interrupter p.133
Rear Hand Insertion
Sensor
+3.3V Reverse tension switch
(mechanical contact)
p.134
ASF/Pump Motor +42V Stepping motor p.137
ASF Paper Sensor +3.3V Reverse tension switch
(mechanical contact)
p.137
ASF Phase Sensor +3.3V Transmission type photo-interrupter p.137
Paper Eject/Release Mechanism (p.140)
PG/PO Motor +42V Stepping motor p.142
Paper Eject Phase
Sensor
+3.3V Reverse tension switch
(mechanical contact)
p.142
Paper Eject Release
Sensor
+3.3V Reverse tension switch
(mechanical contact)
p.142
Others (p.151)
P-Cover Open Sensor +3.3V Reverse tension switch
(mechanical contact)
p.151
Rear Cover Sensor +3.3V Interlock SW (mechanical contact) p.151
MAIN Board – Printer control/drive circuit board p.152
Power Supply Board – Power supply PCB p.154
Table 2-1. Printer Mechanism Components
Part
Drive
voltage
Description Reference