Print Process - Oki MC860 Maintenance Manual

Oki Data CONFIDENTIAL

2.2 Print process

The paper that is fed from the tray 1 or tray 2 or tray 3 is transported by the feed paper roller, the
regist roller L and the transport roller. When paper is fed from MTP , paper is transported by the
MPT feed paper roller and the regist roller U. The paper that is transported on the belt passes
through the electro-photographic process of KYMC and the non-diffused toner image is created
on the paper. When paper passes through the fuser unit, the toner image is fused by heat and
pressure. After the toner image is fused, the paper is unloaded to the face-up stacker or the
face-down stacker depending on the unloading method selected by open/close of the face-up
stacker.
Operation during the one-sided print is described above. Operation during the both-sided print
is described below The paper that has passed through the fuser unit after the rear-side print
is completed first, is transported to the Duplex unit by the separator DUP . The paper that has
entered in to the paper inverting transport path is then transported to the inside of the Duplex
unit from the paper inverting transport path by the inverting movement of the inverting roller. The
paper that has passed through the Duplex unit by the transport roller of the transport path inside
the Duplex unit, is supplied from the feed paper path of the Duplex unit so that the paper enters
the same paper transport path as the feed paper route from the trays. The remaining operations
are the same as those of the one-sided print using the paper supplied from the trays.
Heat roller
Halogen lamp
Backup roller
Separator DUP
Inverting roller
Transport roller
Paper inverting transport path
43967002TH Rev.1
MPT feed paper roller
Transport roller
Regist roller U
Regist roller L
Sub roller
Feed roller
Feed roller
Sub roller
(1) Feed paper from the 1st tray
1. When the regist motor rotates (in counter-clockwise direction) while the
solenoid is activated to the ON state as shown in Fig. 2-1, the paper is
transported until the IN1 sensor is turned ON. (When the solenoid is turned
ON, the feed paper roller is driven.)
2. When the paper turns ON the IN1 sensor, the specified amount of paper is
transported so that the paper is pressed against the regist roller L. (Thus,
paper skew is corrected)
3. As shown in Fig. 2-2, the solenoid is turned OFF so that paper is transported
by the regist roller L. (When the solenoid is turned OFF, the regist roller L is
driven.)
WR sensor
Regist roller U
(drive)
Hopping gear Assy
Solenoid lever
(Solenoid ON)
Sub roller
Paper
(drive)
Hopping roller
(drive)
WR sensor
Regist roller U
(drive)
Solenoid lever
(Solenoid OFF)
Sub roller
Paper
(stop)
Hopping roller
(stop)
2. Theory of Operation
IN2 sensor
Regist roller L
(stop)
IN1 sensor
Regist motor
(Rotates in counter-clockwise direction.)
Fig. 2-1
IN2 sensor
Regist roller L
(drive)
IN1 sensor
Regist motor
(Rotates in counter-clockwise direction.)
Fig. 2-2
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