Oki C821 Maintenance Manual

44015503TH Rev. 1
130 /
Oki Data CONFIDENTIAL
5. MAINTENANCE MENUS
5.3.2.3 Switch scan test
The switch scan test is used for checking entrance sensors and switches.
1. Enter the self-diagnostic mode (level 1) and, until SWITCH SCAN appears on the
upper display, press the MENU up-arrow (
) or MENU down-arrow ( ) button (the
MENU up-arrow ( ) button displays the next test option and the MENU down-arrow
( ) button displays the preceding test option). Then press the ENTER button.
SWITCH SCAN
2. Press the MENU up-arrow (
) or MENU down-arrow ( ) button until an option
shown in table 5-3 for the unit to test appears on the lower display (the MENU up-
arrow ( ) button displays the next option and the MENU down-arrow ( ) button
displays the preceding option).
3. Press the ENTER button. The switch scan test starts, the unit’s name and current
status being displayed
PAPER ROTE:PU
1=H 2=L 3=H 4=L
O
perate the unit (figure 5-1). Display information on applicable LCD display (the
information displayed vary depending on the sensor.
4
. Press the CANCEL button. The state in step 2 is restored.
5. Repeat steps 2 through 4 when necessary.
6. Press the BACK button to end the test (the state in step 1 is restored).
Entrance sensor 1
Entrance sensor 2
Write sensor
Exit sensor
Tray-1 paper-end
sensor
Color registration
sensors L and R,
and density sensor
Belt thermistor
K toner sensor
K RFID
antenna
Y RFID
antenna
M RFID
antenna
C RFID
antenna
Y toner sensor
M toner sensor
C toner sensor
Fuser thermistor
upper sensor-side
Heater frame thermistor
Fuser
thermistor-lower
Image drum up-down sensor
Temperature and
humidity sensor
Duplex-in
sensor
Duplex
cover-open
sensor
Duplex bottom
sensor
Fuser
release sensor
Duplex rear
sensor
Duplex front sensor
Tray-2 entrance sensor
Second-tray
hopping sensor
Third-tray hopping
sensor
Second-tray size
setting switch
First-tray size
setting switch
Tray-2 paper-end sensor
Tray-3 entrance sensor
Third-tray size
setting switch
Tray-3 paper-end sensor
Cover-open switch
Fuser-in
sensor
Figure 5-1: Switch sensor locations

Oki C821 Specifications

General

Brand	Oki
Model	C821
Category	All in One Printer
Language	English