Paper Empty Sensor; Cassette Type Sensor - Epson EPL-5700 Service Manual

EPL-5700

2.1.4.2 Paper Empty Sensor

On the relay board, the paper empty sensor is mounted and detects if there
is any paper in the paper feed cassette. If there is any paper in the cassette,
the actuator is stood up, and the sensor goes to OFF condition.
If there is no paper, the actuator falls into the hole on the paper lifting up
plate, and the sensor is turned ON.
Rev. A

2.1.4.3 Cassette Type Sensor

Cassette type sensor switch with sector-shaped lever is mounted on the
second paper feed unit. When the cassette for each paper size is inserted,
the switch presser on the right side of each cassette pushes the lever
according to the paper size. Then, the cassette type sensor switch is turned
On or Off. This switch is the 3-consecutive switch, and the printer
distinguishes the cassette type(paper size) by combination of ON/OFF
condition of each switch.
Cassette Type Sensor Switch(SW21)
Paper Feed Cassette
Figure 2-6. Cassette Type Sensor Mechanism
Chapter2 Operating Principles
Lever
Off
On
SW21-3
SW21-2
SW21-1
Bottom Side
2-5