17 January, 2003
PHOTOCONDUCTOR UNIT
6-35
D
etailed
D
escr
iptions
Initialization Process and SC Codes
When a drum gear position sensor has found an error, SC code 440-1 or 440-2 is
displayed. The table lists the steps of the initialization process, possible errors, and
corresponding SC codes.
Initialization process
Possible error
SC code
The black drum gear
interrupter is not detected.
440-1
The yellow drum gear
interrupter is not detected.
440-2
Step 1
The four drums are simultaneously
operated for seven seconds. The two
drum position sensors detect the two
drum gear interrupters several times.
Both black and yellow drum
gear interrupters are not
detected.
440-1
Step 2
The time lags between detection of
the black drum gear interrupter and
detection of the yellow drum gear
interrupter are checked. The average
time lag is calculated.
Step 3
The black drum is operated. The
position of the gear is adjusted
according to the average time lag.
The black drum gear
interrupter is not detected
(
☛
NOTE
).
440-1
NOTE:
If the connector of the black drum position sensor has been connected to
the yellow drum position sensor (and the connector of the yellow drum
position sensor, to the black drum position sensor), no error occurs in step
1 and step 2.