Olivetti d-Copia 2500MF Service Manual page 156

2H0/2HZ
Code
C7000 Toner motor problem
A motor over-current signal is detected
continuously for 1 s or longer.
C7200 Broken inner thermistor wire
An abnormal value is detected in the
input data to inner thermistor.
C7300 Toner hopper problem
Toner emptiness is detected for 300 s,
three times during the toner replenish-
ment.
C7400 Developing unit connector insertion
problem
Absence of the developing unit is
detected.
C7410 Drum unit connector insertion prob-
lem
Absence of the drum unit is detected.
C7800 Broken external thermistor wire
The thermistor output value is 4.5 V or
more.
1-4-26
Contents
Causes
Poor contact in the Check the connection of connector YC1 on
connector termi- the engine PWB and the connector on the
nals. 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 Run maintenance item U135 and check if
feed motor. the toner feed motor operates. If not, replace
the toner feed motor.
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation.
Poor contact in the Check the connection of connector YC32 on
connector termi- the engine PWB and the continuity across
nals. the connector terminals. Repair or replace if
necessary.
Defective tempera- Replace the temperature sensor.
ture sensor.
Poor contact in the Check the connection of connector YC1 on
connector termi- the engine PWB and the continuity across
nals. the connector terminals. Repair or replace if
necessary.
Defective toner Replace the developing unit.
sensor.
Developing unit Reinsert the developing unit connector if
connector inserted necessary.
incorrectly.
Defective develop- Replace the developing unit.
ing unit connector.
Drum unit connec- Reinsert the drum unit connector if neces-
tor inserted incor- sary.
rectly.
Defective drum unit Replace the drum unit.
connector.
Poor contact in the Check the connection of connector YC1 on
connector termi- the engine PWB and the continuity across
nals. the connector terminals. Repair or replace if
necessary.
Defective humidity Replace the humidity sensor.
sensor.
Service Manual
Remarks
Check procedures/corrective measures
Y108620-5