Fusing Unit; Paper Take-Up Sensorand Paperexit Sensor; Control Circuit - Epson EPL-5000 Service Manual

Operating Principles
Paper Take-Up Sensor and Paper Exit Sensor
2.1.2.2
The sensor has three functions:
To the top edge of paper. The engine starts
is received.
2) To detect paper size. The printer detects the time it takes for paper to pass the paper
take-up sensor during paper feeding. If this time is long, longer paper is feeding;
if the time is short, shorter paper is feeding.
To detect paper jams and feed jams.
3)
If the paper take-up sensor does not turn on for paper feeding, the printer detects a feed jam.
feed jam is a paper jam that has occurred in the feed process.
If any of the following conditions is detected, the printer detects a paper jam. A paper jam is a jam
that occurs in the printing process area.
The paper take-up sensor
upper case is closed.
The paper take-up sensor
specified time. (Refer to the following timing chart.)
Figure 2-18. Paper Take U Sensor and Paper Exit Sensor
2.1.2.3 Control
The is heated the heater lamp, which is powered by AC voltage. When the power
board receives a
board supplies the AC voltage to the heater lamp. This AC voltage is cut by the interlock
switch when the case is open.
The temperature is detected by the thermistor. Based on the
the engine controller board
LAMP signal.
Engine Controller
Board
CN11A
THERMISTOR
CN8A
LAMP
2-1o
or the paper exit sensor
or the paper exit sensor
Take Up
Solenoid ON
10.53
3.79
On/
LAMP signal from the engine controller board
controls the fusing temperature (165° C, 329" F) using the
2
Power
11
Figure 2-19.
/Action Laser 1000/1500 Service Manual
when the detection signal
is on at power on or when
is not turned on/off within
Timing
signals from the thermistor,

Fusing Unit

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply
CN4E
TF1
HEAT-L
HEAT-N

Control Circuit

A
the
the
[sec.]
the power supply
Heater
Lamp