5-23
Confidential
(3) Check that the display on the LCD is changed when the detection condition of each
sensor is changed. For instance, insert paper to the document front (rear) sensor or the
registration front (rear) sensor, open the front cover or the back cover, take out the toner
cartridge, make a jam at the paper outlet, and insert paper from the manual feed slot, etc.
(4) When the Stop/Exit button is pressed, the machine beeps for one second and returns to
the initial state of the maintenance mode.
■ Location of sensors
Fig. 5-14
LCD Sensors
Sensing status (OK/NG of
temperature/humidity)
TMP External temperature/humidity sensor XX
°C/NG
HUM External temperature/humidity sensor XX %/NG
MAC Internal temperature sensor XX
°C/NG
BT Belt unit temperature sensor XX
°C/NG
LCD Sensors Sensing status (OK/NG)
DF Document front sensor Without documents/With document
DR Document first side rear sensor Without documents/With document
AC ADF cover sensor Close/Open
DB Document second side rear sensor Without documents/With document
Note:
- The "--" appears on the LCD if there is no display.
- The "**" appears on the LCD if the parts are not installed or there is no item.
T1 registration
front/rear sensor
PCB ASSY
PF ASSY
T1 paper edge sensor
Drum position sensor PCB ASSY
Front cover sensor
Panel cable rack
Top drive ASSY
Develop release
sensor PCB ASSY
Registration front sensor
Registration rear sensor
External temperature/
humidity sensor
High-voltage power supply
PCB ASSY