Oki MC860 Maintenance Manual

Oki Data CONFIDENTIAL
43967002TH Rev. 1
330 /
7. Troubleshooting
Check item Check work
Action to be taken at NG
(4-2-4) Check the system connection
Paper feed motor
drive cable
Check the connection condition of the
cables.
Check if the connector is connected in
the half-way only or not, and check if the
connector is inserted in a slanted angle or
not. Check also that cables are assembled
without any abnormality.
Normalize the
connection
condition.
Replace the cable
with the normal
cable.
Paper feed motor
drive cable
Check that any cable is not pinched during
assembling of the printer.
Remove the HOPSIZE connector
of the
PU PCB and check the followings at the
cable side.
Short circuit between pin1 – FG
Short circuit between pin2 – FG
Short circuit between pin3 – FG
Short circuit between pin4 – FG
Replace the cable
with the good one
that normalizes
the connection
condition.
Paper feed motor Remove the HOPSIZE connector
of the
PU PCB and check that approx. 3.4 ohms
can be measured between pin1 -pin-2 at
the cable end, and that approx. 5 ohms
can be measured between pin3 -pin-4
respectively.
Replace the paper
feed motor.
7.5.2.(5) Paper feed jam (error code 390: Multipurpose tray)
(5-1) Jam occurs immediately after the power is turned on. (Multipurpose tray)
Check item Check work
Action to be taken at NG
(5-1-1) Check the condition of the paper running path
Paper running path
of the multipurpose
tray
Check if paper is jammed or not in the
paper running path.
Remove the
jammed paper.
(5-1-2) Check condition of the mechanical par
ts
Check the sensor
levers of the paper
entrance sensor 2
and the WR sensor.
Check if shape and movement of the
sensor levers have any abnormality or not.
Replace the sensor
lever with the good
sensor lever.
(5-1-3) Check condition of electr
ical parts
Check the detection
condition of the
sensor signal.
Confirm that the sensor signals are
normally detected by using the SWITCH
SCAN function of the self-diagnostic mode.
Replace either the
PU PCB or the front
sensor PCB (RSF
PCB) or connection
cable.
Check the sensor
output signal level of
the paper entrance
sensor 2 and the
WR sensor.
Check for the following signals at the FSNS
connector
of the PU PCB.
pin2: WR sensor
pin3: Entrance sensor 2
Confirm that the above signal levels change
when the sensor lever is operated.
Replace the front
sensor PCB (RSF
PCB)
Check the power
voltages supplied
to the front sensor
PCB (RSF PCB)
Check the 5V power at the FSNS connector
of the front sensor PCB (RSF PCB).
pin1: 5V power
pin5: 0VL
Replace the
connection cable.

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