Xero - Oki B930 Service Manual

5.5" x 13" SEF (Legal)
5.5" x 14" SEF (Legal)
DL LEF
C5 LEF
C4 SEF
Rectangular LEF
Com10 LEF
B5 LEF
B4 SEF
Executive LEF
16K LEF TFX(PRC)
8K SEF TFX(PRC)
8.5" x 11" SEF (Letter)
11" x 17" LEF
A4 LEF
A3 SEF
Stopper (max.)

Xero

CRU
The CRU is made up of the following main six components.
• Drum
The Drum is composed of a photoconductive surface layer (an insulator in the dark but
becomes conductor when receiving light) and a conductive inner layer (aluminum cylinder).
The Drum retains electric charges on the surface in the dark, and becomes conductive when
exposed to light.
• BCR
The BCR (Bias Charge Roll) uniformly distributes negative charges on the Drum surface.
• Auger
The Auger is a spiral mixer to stir toner supplied from the Toner Cartridge and carriers in the
Xero/Deve Cartridge.
• Magnet Roll
The Magnet Roll retains developer in a thin layer on its surface, and feeds toner to the gap
between the Drum and the Magnet Roll.
• Finger
The Finger is a mechanism to prevent paper from being caught.
• Cleaning Blade
The Cleaning Blade scrapes toner remaining after the transfer step off the drum surface.
HSG ASSY-BTR
The BTR of the HSG ASSY-BTR is driven by direct contact with the Drum of the CRU.
The BTR applies positive charges to the rear surface of the paper when the paper passes
between the BTR and Drum. The negatively charged toner image is attracted by positive
charges on the rear surface of the paper. Thus, the toner image is transferred from the drum
surface to the paper surface.
215.9
215.9
220
229
229
235
241.3
257
257
266.7
267(270)
267(270)
279.4
279.4
297
297
303
2-11
330.2
355.6
110
162
324
120
104.8
182
364
184.2
194(195)
389(390)
215.9
431.8
210
420
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