Epson EPL-N1200 Service Manual - Page 62

Paper Feeding from the Multi-Purpose Tray, Multi-Purpose Tray Standard Tray

Get Epson EPL-N1200 PDF manuals and user guides View all Epson EPL-N1200 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 62 highlights

EPL-N1200 Service Manual Operating Principles 2.1.1.1 Paper Feeding There are two methods of feeding paper into the printer. One uses the multi-purpose tray (standard tray), and the other uses one or two optional 500-sheet lower paper cassettes. Paper-out conditions are detected by the paper empty sensor, located above the paper tray or the cassette. While paper is in the tray or cassette, the detection lever for the paper empty sensor is lifted. When the paper supply runs out, the detection lever is lowered, causing the shutter to interrupt light from the LED to the photo-transistor. This causes the signal to go HIGH, informing the engine driver that the paper tray or the cassette is empty. When the paper take-up solenoid is actuated, the paper take-up roller rotates and feeds the first page. The paper take-up roller stops after one rotation. The timing to align the leading edge of the page with the image is detected by the paper take-up sensor. When the page is on top of the paper take-up sensor, the detection lever is lowered, allowing light from the LED to reach the photo-transistor. This causes the signal to go HIGH, informing the engine driver that paper has been detected. The paper exit sensor is located beyond the fusing roller in the paper path. When paper passes the paper exit sensor, the detection lever is lowered, allowing light from the LED to reach the photo-transistor. This causes the signal to go HIGH, informing the engine driver that paper has been delivered. Multi-Purpose Tray (Standard Tray) The paper guide can be moved to fit against the sides of various sizes of paper, allowing the paper to be fed. Although the paper take-up roller stops after one rotation, the transport rollers continue to feed the first page, because these rollers are independent of the paper take-up roller. At this time, the depressing cams attached to the paper take-up roller depresses the paper lift-up plate to prevent the feeding of a second sheet. Lower Fusing Roller Paper Upper Fusing Roller Paper Exit Sensor OPC Drum` Transport Roller Paper Lifting-Up Plate Imaging Transfer Roller Depressing Cams Paper Take-up Roller Paper Take-Up Sensor Transport Roller Paper Take-Up Clutch Paper Guide Paper Take-Up Solenoid Paper Empty Sensor Figure 2-3. Paper Feeding from the Multi-Purpose Tray Rev. A 2-3

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
2.1.1.1 Paper Feeding
There are two methods of
feeding
paper
into the printer.
One
uses the multi—purpose tray
(standard tray), and the other uses one or two optional 500-sheet lower paper cassettes.
Paper-out conditions are detected by the paper empty sensor, located above the paper tray or the
cassette.
While paper is in the tray or cassette, the detection lever for the paper empty sensor is
lifted.
When the paper supply runs out, the detection lever is lowered, causing the shutter to
interrupt light from the LED to the photo-transistor.
This causes the signal to go HIGH, informing
the engine driver that the paper tray or the cassette is empty.
When the paper take-up solenoid is actuated, the paper take-up roller rotates and feeds the first
page. The paper take-up roller stops after one rotation. The timing to align the leading edge of the
page with the image is detected by the paper take-up sensor.
When the page is on top of the paper take-up sensor, the detection lever is lowered, allowing light
from the LED to reach the photo-transistor.
This causes the signal to go HIGH, informing the
engine driver that paper has been detected.
The paper exit sensor is located beyond the fusing roller in the paper path.
When paper passes the
paper exit sensor, the detection lever is lowered, allowing light from the LED to reach the
photo-transistor.
This causes the signal to go HIGH, informing the engine driver that paper has
been delivered.
Multi-Purpose Tray (Standard Tray)
The paper guide can be moved to fit against the sides of various sizes of paper, allowing the paper
to be fed.
Although the paper take-up roller stops after one rotation, the transport rollers continue to feed the
first page, because these rollers are independent of the paper take-up roller.
At this time, the
depressing cams attached to the paper take-up roller depresses the paper lift-up plate to prevent
the feeding of a second sheet.
Paper
Imaging Transfer
Roller
Paper Take-Up Sensor
Paper Exit Sensor
Transport Roller
Paper Take-Up Clutch
Paper Take-Up Solenoid
Paper Empty Sensor
Paper Guide
Lower Fusing Roller
Upper Fusing Roller
OPC Drum‘
Transport Roller
Paper Lifting-Up
Plate
Depressing Cams
Paper Take-up Roller
Figure 2-3.
Paper Feeding from the Multi-Purpose Tray
EPL-N1200 Service Manual
Operating Principles
Rev. A
2-3