Countermeasures to each error are:
• CALIBRATION ERR, DENS SENSOR ERR
Confirmation 1 When the above is displayed, check connection of the sensor cable.
If the connection is found abnormal, correct it to the normal state.
Confirmation 2 Check the surface of the sensor to confirm if it is stained by the
toner, paper dust, etc. If stained, wipe the surface neatly.
• DENS SHUTTER ERR
Confirmation 3 Confirm adequacy of the opening and shutting of the sensor
shutter by MOTOR&CLUTCH TEST of the maintenance utility. If a
malfunction is found, replace the shutter unit.
• DENS ID ERR
Confirmation 4 Remove the ID unit to confirm if the surface of the drum is covered
with abnormal amount of toner. Then, replace the LED head if the
focus blurs or replace the ID unit.
When a new ID unit is to be used for trial, attach a treatment device
to the ID unit lest the fuse breaks ( refer to p.176).
Y108500-4
Service Manual
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