Chapter 7
7-2
7.2 Other Control
7.2.1 Overview
0020-2697
i-SENSYS MF4300dn / i-SENSYS MF4350d / i-SENSYS MF4380dn / i-SENSYS MF4310/4318 / i-SENSYS MF4320d / i-SENSYS MF4330d / i-SENSYS
MF4340d / i-SENSYS D450d / i-SENSYS MF4370dn
Pickup/Feed Operation
The pickup/feed assembly is the mechanism to pickup and feed paper one at a time from the pickup tray or the manual feed tray.
The pickup/feed operation of the machine is explained below.
1) Right after the DCONT PCB receives a print command from the SCNT PCB, it rotates the main motor (M1). By doing so, other rollers, except the Cassette
pickup solenoid, start to rotate.
2) When it becomes initial rotation ready state, the pickup solenoid (SL1) turns ON for about 0.2 sec. As a result of that, the rotation of the main motor is transferred
and the pickup roller starts to rotate.
Initial Rotation Ready
It indicates the following state: the main motor drives, and after a certain period of time, the temperature of the fixing assembly reaches to the specified value and
the scanner motor reaches to the specified number of rotation.
3) The pickup cam rotates along with the rotation of the pickup roller, and by following the shape of the pickup cam, the lifting plate is pushed up with the force
of the spring. A paper pushed up with the lifting plate is picked up by the rotation of the pickup roller and fed to inside of the machine.
4) After a certain period of time that the leading edge sensor (PS801) detects the leading edge of picked up paper, the DCNT PCB transmits the laser beam detection
signal (/BD) to the SCNT PCB.
5) Based on the /BD signal, the SCNT PCB transmits the video signal to the laser/scanner assembly and an image is formed on the photosensitive drum. Because
of that, it is controlled to match the leading edges of an image and a paper.
6) A paper is delivered to the delivery tray with the rotation of the photosensitive drum, pressure roller, and face-down delivery roller.
F-7-2
[1] Face-down delivery roller
[2] Pressure roller
[3] Fixing film unit
[4] Transfer charging roller
[5] Photosensitive drum
[6] Pickup roller
SCNT
[1]
PS804
PS803
[3]
[2]
[4]
[5]
PS801
PS802
SL1
[6]
[7]
M1
[8]
[9]
Summary of Contents for i-SENSYS MF4300dn
Page 1: ...Aug 22 2008 Service Manual MF4300 Series ...
Page 2: ......
Page 6: ......
Page 12: ...Contents 15 1 1 Solvents Lubricants Table 15 1 ...
Page 13: ...Chapter 1 Introduction ...
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Page 16: ......
Page 32: ......
Page 33: ...Chapter 2 Basic Operation ...
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Page 36: ......
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Page 39: ...Chapter 3 Original Exposure System ...
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Page 42: ......
Page 44: ...Chapter 3 3 2 F 3 1 ...
Page 49: ...Chapter 4 Original Feeding System ...
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Page 55: ...Chapter 4 4 3 F 4 6 ...
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Page 67: ...Chapter 5 Laser Exposure ...
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Page 73: ...Chapter 5 5 3 ...
Page 76: ......
Page 77: ...Chapter 6 Image Formation ...
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Page 80: ......
Page 85: ...Chapter 7 Pickup and Feed System ...
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Page 97: ...Chapter 8 Fixing System ...
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Page 109: ...Chapter 9 External and Controls ...
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Page 121: ...Chapter 10 Maintenance and Inspection ...
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Page 129: ...Chapter 11 Measurement and Adjustments ...
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Page 135: ...Chapter 12 Correcting Faulty Images ...
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Page 144: ...Chapter 12 12 6 2 DCNT PCB 3 Power supply PCB 4 High voltage PCB SW301 Interlock switch ...
Page 145: ...Chapter 13 Error Code ...
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Page 147: ...Contents Contents 13 1 Error Code 13 1 13 1 1 Error Code Outline 13 1 13 1 2 Error Code 13 1 ...
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Page 153: ...Chapter 14 Service Mode ...
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Page 156: ...Contents 14 3 2 3 Sensor test 14 16 14 3 2 4 Key test 14 16 ...
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Page 175: ...Chapter 15 Service Tools ...
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Page 177: ...Contents Contents 15 1 Service Tools 15 1 15 1 1 Solvents Lubricants Table 15 1 ...
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Page 181: ...Aug 22 2008 ...
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