Electrophotographic process (EP process)
Printhead
The printhead scans the photo conductor drum surface with a laser beam. It consists of the following
components:
•
Laser diode (LD) card assembly
•
Oscillator
•
Start of scan card assembly
When a laser beam is scanned across the photoconductor drum surface from one end to the other while turning
on and off the beam, one line of latent image is created. If the scanning by the laser beam is repeated while
rotating the drum, a two-dimensional image is created. The resolution in the scanning direction (from right to
left) is determined by the rotational speed of the printhead motor, depending on how quickly the laser is
adjusted. The resolution in the process direction (from top to bottom) is determined by the rotational speed of
the printhead motor. The higher the scanning speed becomes, the sooner the scanning of the next row can be
started.
Step 1: Charge
During the charge step, voltage is sent from the HVPS to the charge roll beside the photoconductor. The charge
roll applies a uniform negative charge over the entire surface of the photoconductor to prepare it for the laser
beam.
HVPS
(-VDC)
(-VDC)
Ground
Conductive Tube
Photoconductive
Surface
0V
-VDC value
DRUM
Drum Surface
Voltage
Drum Surface
Image
Ground
Charge roll
7015
Theory of operation
478
Содержание XM1135
Страница 214: ...7015 214 ...
Страница 238: ...D ADF cover open E Flatbed cover open F paper feed sensor 7015 Service menus 238 ...
Страница 295: ...5 Remove the two screws C securing the right cover to the RIP shield C 6 Open the front cover 7015 Parts removal 295 ...
Страница 308: ...4 Remove the four screws B and then remove the right front mount B 7015 Parts removal 308 ...
Страница 310: ...Cartridge plunger removal 1 Open the front door 2 Tilt the cartridge plunger 7015 Parts removal 310 ...
Страница 323: ...4 Remove the ground shield 5 Remove the display 7015 Parts removal 323 ...
Страница 352: ...c Bring the cable in front of the two cable holders near the ACM shaft 7015 Parts removal 352 ...
Страница 353: ...d Loop the cable behind the right cable holder e Twist the cable so that it forms a loop 7015 Parts removal 353 ...
Страница 356: ...9 Remove the two screws C Below are the cam release and bracket 7015 Parts removal 356 ...
Страница 362: ...8 Remove the screw A and then detach the trailing edge sensor A 7015 Parts removal 362 ...
Страница 363: ...9 Disconnect the two springs B B 7015 Parts removal 363 ...
Страница 383: ...2 Squeeze the latches to release the separator pad 3 Pull away the separator pad and remove 2 1 7015 Parts removal 383 ...
Страница 385: ...3 Pull away the separator roll and remove 2 1 Flatbed cushion removal 1 Open the scanner 7015 Parts removal 385 ...
Страница 397: ...A 9 Feed the wireless cable through the channel on the left side of the printer 7015 Parts removal 397 ...
Страница 407: ...3 Swing the right cover backward to remove 4 Remove the screw D D 7015 Parts removal 407 ...
Страница 417: ...Power supply PCN1 PCN2 PCN3 PCN5 PCN4 7015 Component locations 417 ...
Страница 418: ...7015 418 ...
Страница 425: ...Assembly 1 Covers 7015 Parts catalog 425 ...
Страница 427: ...Assembly 2 Imaging 7015 Parts catalog 427 ...
Страница 430: ...7015 Parts catalog 430 ...
Страница 431: ...Assembly 3 Control panel MX41x MX51x XM1140 and XM1145 2 1 3 7015 Parts catalog 431 ...
Страница 433: ...Assembly 4 Control panel MX31x 3 2 1 7015 Parts catalog 433 ...
Страница 435: ...Assembly 5 Electronics 1 MX31x MX41x and XM1140 1 2 3 4 8 9 5 7 6 7015 Parts catalog 435 ...
Страница 438: ...7015 Parts catalog 438 ...
Страница 439: ...Assembly 6 Electronics 1 MX51x and XM1145 1 2 9 10 8 7 3 4 5 6 7015 Parts catalog 439 ...
Страница 442: ...7015 Parts catalog 442 ...
Страница 443: ...Assembly 7 Electronics 2 MX31x MX41x and XM1140 4 3 2 1 6 5 7015 Parts catalog 443 ...
Страница 445: ...Assembly 8 Electronics 2 MX51x and XM1145 4 3 2 1 5 6 8 9 7 7015 Parts catalog 445 ...
Страница 447: ...Assembly 9 Frame MX31x MX41x and XM1140 2 5 7 11 12 14 15 13 10 9 1 4 4 3 8 6 7015 Parts catalog 447 ...
Страница 450: ...7015 Parts catalog 450 ...
Страница 451: ...7015 Parts catalog 451 ...
Страница 452: ...Assembly 10 Frame MX51x and XM1145 10 11 12 14 13 9 1 5 4 7 8 16 6 2 3 7015 Parts catalog 452 ...
Страница 454: ...7015 Parts catalog 454 ...
Страница 455: ...Assembly 11 Option trays 3 4 5 6 1 2 7015 Parts catalog 455 ...
Страница 458: ...7015 Parts catalog 458 ...
Страница 460: ...7015 Parts catalog 460 ...
Страница 468: ...7015 468 ...
Страница 470: ...7015 470 ...
Страница 484: ...7015 484 ...
Страница 496: ...7015 Index 496 ...