Oki MC860 Maintenance Manual

Oki Data CONFIDENTIAL
43967002TH Rev. 1
337 /
7. Troubleshooting
(8-2) Two-sided printing jam occurs during taking in the paper into Duplex unit.
Check item Check work
Action to be taken at NG
(8-2-1) Solenoid operation check
Duplex solenoid Confirm that the Duplex solenoid works
normally by using the Motor & Clutch Test
of the self-diagnostic mode.
V7Y PCB
replacement or solid
replacement
Separator DUP
(Paper unloading/
DUP paper taking-
in switching gate
located immediately
after the fuser unit)
Check visually movement of the gate by
using the Motor & Clutch Test of the self-
diagnostic mode. (EXIT SOLENOID) Check
if movement is unsmooth or not, if amount
of open/close is abnormal or not.
Replace the
separator DUP.
ON/OFF timing of
the Duplex solenoid
While the cover is in the opened state,
perform the test print and confirm if the
timing to open the separator DUP is correct
or not.
Replace the WR
sensor lever or
solenoid.
(8-2-2)
Sensor lev
er operation check
Dup-IN sensor lever Open the rear cover. Touch the Dup-IN
sensor lever to check if its movement is
unsmooth or not.
Replace the Dup-IN
sensor lever.
DUP-IN sensor Confirm that the sensor signals are
normally detected by using the SWITCH
SCAN function of the self-diagnostic mode.
Replace the Duplex
PCB (V7Y PCB),
or replace the
defective sensor or
connection cable.
(8-2-3)
Check condition of the paper r
unning path
Paper inverting
transport path
Check that any foreign materials such
as paper chip or blue do not exist that
hampers the smooth movement of paper in
the paper inverting transport path.
Remove the foreign
material.
Check item Check work
Action to be taken at NG
(8-2-4) Motor operation check
Duplex motor Confirm that the Duplex solenoid works
normally by using the Motor & Clutch Test
of the self-diagnostic mode.
Open the rear cover and check rotation of
the roller.
V7Y PCB
replacement or
motor replacement.
Duplex pull-in/
reversing roller and
its pinch roller
Check if the pull-in/reversing roller of the
Duplex unit contacts or not with the pinch
roller of the cover side when the Duplex
rear cover is closed. (Does the pinch roller
rotate when the roller is rotating?
Rear cover
replacement.
(8-3) Two-sided printing jam occurs in the process of reversing paper.
Check item Check work
Action to be taken at NG
(8-3-1) Sensor lever operation check
Dup-IN sensor lever Open the rear cover. Touch the Dup-IN
sensor lever to check if its movement is
unsmooth or not.
Replace the Dup-IN
sensor lever.
DUP-IN sensor Confirm that the sensor signals are
normally detected by using the SWITCH
SCAN function of the self-diagnostic mode.
Replace the Duplex
PCB (V7Y PCB),
or replace the
defective sensor or
connection cable.
(8-3-2) Motor operation chec
k
Duplex motor Check if the paper reversing operation is
started or not by visual inspection when
viewing through slit of the rear cover.
If the paper reversing operation is not
started, check if movement of the planetary
gear inside the Duplex unit is unsmooth or
not.
Replace the
planetary gear.

Oki MC860 Specifications

Printing Specifications

print speed color	26 ppm
print speed black & white	33 ppm
time to first page color	10 seconds
time to first page black & white	9.5 seconds
print resolution	1200 x 600 dpi
processor	500 MHz PowerPC CPU
duty cycle	75, 000 prints per month

Copying Specifications

copy speed color	26 cpm
copy speed black & white	33 cpm
first copy out color	14.5 seconds
first copy out black & white	13 seconds
copy resolution	600 x 600 dpi

Scanning Specifications

scan type	Color and black & white
max scan area	11" x 17"
scan speed black & white	33 spm
scan speed color	26 spm
scan resolution	600 dpi

Fax Specifications

fax modem	33.6 Kbps Super G3
transmission speed	2 seconds/page
fax resolution	600 x 600 dpi
speed dial locations	500 locations
broadcast transmission locations	530 locations

Power and Acoustic Noise

power consumption peak	1, 300W
power consumption standby	160W Avg.
power save mode	≤25W
acoustic noise operating	54dB
acoustic noise standby	≤37dB

System Memory

standard imaging RAM	512 MB
max imaging RAM	768 MB
hard disk drive	40 GB

Weight and Dimensions

1-tray configuration dimensions	22.2" x 25.9" x 26.3"
2-tray configuration dimensions	33.3" x 30.2" x 44.5"
weight 1-tray configuration	149.9 lb
weight 2-tray configuration	200.6 lb
weight 3-tray configuration	211.6 lb