Epson EPL-5700 Service Manual page 47

EPL-5700
Table 2-6. Function of Each Electric Parts(Cont.)
Name
Inter lock switch Detects open/close condition of the upper
(S2) cover and blocks output power except DC5V,
when the cover is opened.
Cover is closed; On
Laser diode Detects printing start position by emission of
control board the laser diode and SOS sensor, and emits
the laser beam to the OPC drum by image
signal.
Paper feed Transmits driving power of the main motor to
solenoid (SL1) the paper feed roller.
Thermister (TH1) Detects the surface temperature of the heat
roller and feeds back to the main control
board.
Thermostat(TS1) Blocks electricity to the heater lamp when the
temperature of the fusing part increases
abnormally.(195 C)
Rev. A
Function
Following shows position of electric parts functions of the optional second
paper feed unit.
Cassette Type Sensor
Switch
Paper Feed Solenoid
Figure 2-18. Locaion of Electric Parts in the Second Paper Feed
Table 2-7. Function of Electric Parts of Second Paper Feed Cassette
Name
Paper feed Controls gear/clutch, which transmits driving
solenoid force of the main motor to the paper feed roller.
(SL21)
Solenoid On: Transmission of driving force.
Cassette type 3 consecutive switches detect the difference of
sensor switch the cassette type determined by paper size.
Paper empty Detects paper empty.
sensor(on the
Paper in: LOW.
relay board)
Relay board Receives control signal or power supply from the
printer body and sends them to the electric parts
in the second paper feed unit.
Chapter2 Operating Principles
Relay Board
Paper Empty Sensor
Cassette
Function
2-15