Step 2: Expose
The laser fires a focused beam of light at the surface of the photoconductor and writes an invisible image, called a latent
image. The laser beam only discharges the surface where the beam hits the photoconductor. This creates a difference
in charge potential between the exposed area and the rest of the photoconductor surface.
Modulated
Laser Beam
0V
DRUM
Drum Surface
Image
Drum Surface
Voltage
Laser Beam
Discharge
Level
Invisible Latent Image
Laser Beam
Printhead
Step 3: Develop
Once the laser exposes the photoconductor, the HVPS sends charge to the developer roll. Because of the charge
difference between the toner on the developer roller and the electrostatic image created by the laser, the toner is
attracted to areas of the photoconductor surface exposed by the laser.
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Appendix C: Theory of operation
284
Summary of Contents for M1140
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Page 197: ...b Set the spring over the plunger 4514 Repair information 197 ...
Page 204: ...3 Squeeze the latches B to release the left and right links B 4514 Repair information 204 ...
Page 228: ...10 Remove the screw C and then detach the trailing edge sensor A 4514 Repair information 228 ...
Page 229: ...11 Disconnect the two springs D 4514 Repair information 229 ...
Page 246: ...3 Swing the right cover backward to remove 4 Remove the screw D 4514 Repair information 246 ...
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Page 255: ...Assembly 1 Covers 4514 Parts catalog 255 ...
Page 257: ...Assembly 2 Electronics 1 4514 Parts catalog 257 ...
Page 259: ...Assembly 3 Electronics 2 4 3 2 1 6 5 4514 Parts catalog 259 ...
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Page 262: ...Assembly 4 Frame 4514 Parts catalog 262 ...
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Page 265: ...Assembly 5 Option trays 3 4 5 6 1 2 4514 Parts catalog 265 ...
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