2K5
1-4-28
C7000
Toner motor problem
A motor over-current signal is detected
continuously for 1 s or longer.
Poor contact in the
connector termi-
nals.
Check the connection of connector YC1 on
the engine PWB and the connector on the
toner feed motor, and the continuity across
the connector terminals. Repair or replace if
necessary.
Broken the gear.
Check visually and replace the gear if nec-
essary.
Defective toner
feed motor.
Run maintenance item U135 and check if
the toner feed motor operates. If not, replace
the toner feed motor.
Defective engine
PWB.
Replace the engine PWB and check for cor-
rect operation.
C7200
Broken inner thermistor wire
An abnormal value is detected in the
input data to inner thermistor.
Poor contact in the
connector termi-
nals.
Check the connection of connector YC32 on
the engine PWB and the continuity across
the connector terminals. Repair or replace if
necessary.
Defective tempera-
ture sensor.
Replace the temperature sensor.
C7300
Toner hopper problem
Toner emptiness is detected for 300 s,
three times during the toner replenish-
ment.
Poor contact in the
connector termi-
nals.
Check the connection of connector YC1 on
the engine PWB and the continuity across
the connector terminals. Repair or replace if
necessary.
Defective toner
sensor.
Replace the developing unit.
C7400
Developing unit connector insertion
problem
Absence of the developing unit is
detected.
Developing unit
connector inserted
incorrectly.
Reinsert the developing unit connector if
necessary.
Defective develop-
ing unit connector.
Replace the developing unit.
C7410
Drum unit connector insertion prob-
lem
Absence of the drum unit is detected.
Drum unit connec-
tor inserted incor-
rectly.
Reinsert the drum unit connector if neces-
sary.
Defective drum unit
connector.
Replace the drum unit.
C7800
Broken external thermistor wire
The thermistor output value is 4.5 V or
more.
Poor contact in the
connector termi-
nals.
Check the connection of connector YC10 on
the engine PWB and the continuity across
the connector terminals. Repair or replace if
necessary.
Defective humidity
sensor.
Replace the humidity sensor.
C7900
Drum EEPROM error
Reading from or writing to EEPROM
cannot be performed.
Poor contact in the
connector termi-
nals.
Check the connection of connector on the
engine PWB and the continuity across the
connector terminals. Repair or replace if
necessary.
Defective drum
unit.
Replace the drum unit.
Code
Contents
Remarks
Causes
Check procedures/corrective measures
Summary of Contents for TASKALFA 300I
Page 1: ...SERVICE MANUAL Published in February 2010 842K5111 2K5SM061 Rev 1 TASKalfa 300i ...
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Page 14: ...2K5 This page is intentionally left blank ...
Page 22: ...2K5 1 1 8 This page is intentionally left blank ...
Page 196: ...2K5 1 4 52 This page is intentionally left blank ...
Page 252: ...2K5 1 5 56 This page is intentionally left blank ...
Page 274: ...2K5 2 1 20 This page is intentionally left blank ...
Page 310: ...2K5 2 3 28 This page is intentionally left blank ...
Page 347: ...INSTALLATION GUIDE FOR PAPER FEEDER ...
Page 369: ...INSTALLATION GUIDE FOR BUILT IN FINISHER ...
Page 381: ...INSTALLATION GUIDE FOR JOB SEPARATOR ...
Page 391: ...INSTALLATION GUIDE FOR FAX System ...
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