Separation
Paper separates from the drum as a result of the electrical attraction between the paper and the transfer
belt. Pick-off pawls [5] help separate the paper from the drum.
ID Sensor
The ID sensor [6] measures the reflectivity of the pattern formed by the laser on the surface of the drum.
This output signal is used for toner supply control and also measures the drum surface reflectivity, which is
used for charge roller voltage control.
Cleaning
The drum cleaning blade [7] removes any toner remaining on the drum surface after the image is transferred
to the paper.
Quenching
Finally, the light from the quenching lamp [8] electrically neutralizes the charge on the drum surface.
Printing Process Overview
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Summary of Contents for A-P4
Page 1: ...Model A P4 Machine Code G147 SERVICE MANUAL May 12th 2006 Subject to change...
Page 27: ...Installation Flowchart 1 Installation 26 1...
Page 59: ...3 Reattach the application cover x1 1 Installation 58 1...
Page 65: ...2 Preventive Maintenance 64 2...
Page 72: ...Left Covers 1 Left upper cover A x4 2 Controller cover B x2 Covers and Common Procedures 71 3...
Page 82: ...Laser Unit 81 3...
Page 103: ...5 Cover C x2 6 Gear D x1 7 Lower paper feed unit E x2 x1 3 Replacement and Adjustment 102 3...
Page 128: ...Duplex Unit Duplex Cover Removal 1 Duplex unit cover A x4 Duplex Unit 127 3...
Page 181: ...4 Troubleshooting 180 4...
Page 289: ...Self Diagnostic Test Flow 5 Service Tables 288 5...
Page 306: ...Controller Block Diagram Board Layout 305 6...
Page 319: ...What Happens When a New Unit Is Detected 6 Details 318 6...
Page 367: ...6 Details 366 6...
Page 379: ...MEMO 378...
Page 380: ...MEMO 379...
Page 381: ...MEMO 380...