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EPSON EPL-5900/EPL-5900L
Revision B
Operating Principles
Overview
62
2.1.4 Names and Functions of Electrical Parts (Printer
Body)
Figure 2-4. Locations of Electric Parts (Printer Body)
Table 2-4. Names and Functions of Electrical Parts
Symbol
Name
Function
M1
Main Motor
Drives the printer.
M2
Cooling Fan Motor
Expels the heat from the printer body.
H1
Heater Lamp
Heats the Heat Roller.(600W)
TH1
Thermistor
Detects surface temperature of the Heat Roller, and feeds
back the detected temperature to the heater control circuit.
TS1
Thermostat
Shuts off current to the Heater Lamp (H1) if the
temperature of the fuser has risen too high. (215
°
C)
PH
Print Head Unit
Forms a latent image on the surface of the OPC drum.
M3
Polygon Motor
(inside the Print Head
Unit)
The polygon motor, equipped with a polygon mirror
having uniform seven facets, runs at a high speed to direct
a laser beam in the main scanning direction.
PWB-D
Laser Diode Control
Board (inside the Print
Head Unit)
The SOS sensor detects the printing start position and the
laser diode emits a laser beam according to the image
signal so that it hits a corresponding position on the OPC
drum.
S1
Power Switch
Turns power on/off.
S2
Interlock Switch
Turns off all the output power except DC 2V when
detecting the opening of the Top Cover.
PE1
Paper Empty Sensor
Detects the absence of paper. L when no paper is detected
PS1
Paper Feed Sensor
Detects feeding of paper. L when no paper is detected
PS3
Paper Eject Sensor
Detects ejection of paper. L when no paper is detected
SL1
Paper Feed Solenoid
Transmits the driving force of the main motor to the Paper
Feed Roller.
PU1
Power Supply Unit
Changes supply voltage from AC power to DC power, and
outputs it. AC power is supplied to the Heater Lamp (H1).
HV1
High Voltage Circuit
Board
Supplies the following parts with the respective voltages:
Charging brush roller: Charging voltage
Development sleeve roller: Development bias voltage
Development toner control plate:
Development blade voltage
Development toner collect plate:
Under development seal voltage
Transfer roller:
Transfer voltage
PWB-P
Controller Circuit
Board
Communicates with the personal computer, and controls
all the operation of the printer.
PWB-IF Interface Circuit Board Connects the Main Board Assy to the personal computer.
Table 2-4. Names and Functions of Electrical Parts (continued)
Symbol
Name
Function
Содержание EPL-5900
Страница 1: ...EPSON EPL 5900 EPL 5900L Monochrome Page Printer SERVICE MANUAL SEPG01005 ...
Страница 21: ...C H A P T E R 1 PRODUCTDESCRIPTION ...
Страница 75: ...C H A P T E R 2 OPERATINGPRINCIPLES ...
Страница 96: ...C H A P T E R 3 TROUBLESHOOTING ...
Страница 111: ...C H A P T E R 4 DISASSEMBLYANDASSEMBLY ...
Страница 138: ...C H A P T E R 5 ADJUSTMENT ...
Страница 143: ...C H A P T E R 6 MAINTENANCE ...
Страница 145: ...C H A P T E R 7 APPENDIX ...
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