Olivetti d-Color MF2552 plus, Service Manual, Page: 339 / 740

2NP
1-4-41
6230 Fuser thermistor 1 (edge)
break error
During warming up a hearter,
fuser thermistor 2 detects a
temperature of 100 °C/212 °F
or higher and, fuser thermistor
1 detects a temperature of 37
°C/99 °F or lower.
Defective connec-
tor cable or poor
contact in the con-
nector. Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
Fuser thermistor 1 and fuser PWB (YC3)
Fuser unit and engine PWB (YC30)
Deformed connec-
tor pin. If the I/F connector pins of the fuser unit and
the main unit are deformed owing to foreign
matters, such as paper dusts, replace the
connectors or the units including the con-
nectors.
Defective fuser
thermistor. Replace the fuser unit (see page 1-5-17).
Defective PWB. Replace the engine PWB and check for cor-
rect operation (see page 1-5-33).
6250 Abnormally low fuser
thermistor 1 (edge) temper-
ature
The fuser temperature lower
than 80 °C/176 °F is detected
continuously for 1 s during
printing.
Deformed connec-
tor pin. If the I/F connector pins of the fuser unit and
the main unit are deformed owing to foreign
matters, such as paper dusts, replace the
connectors or the units including the con-
nectors.
Defective fuser
thermistor. Replace the fuser unit (see page 1-5-17).
Defective fuser
heater.
Defective PWB. Replace the IH PWB or the engine PWB and
check for correct operation (see page 1-5-
51, 1-5-33).
6410
Fuser unit type mismatch
problem
Absence of the fuser unit is
detected.
Fuser unit connec-
tor inserted incor-
rectly. Reinsert the fuser unit connector if neces-
sary.
Different type of
the fuser unit is
installed. Install the correct fuser unit
(see page 1-5-17).
6600 Belt rotation error
The belt was detected to stop
for 2 s continuously during
motor remote is on.
Defective fuser
motor. Replace the fuser motor.
Defective IH belt. Replace the fuser unit (see page 1-5-17).
Defective IH PWB. Replace the IH PWB and check for correct
operation (see page 1-5-51).
Defective PWB. Replace the engine PWB and check for cor-
rect operation (see page 1-5-33).
6710 CPU thermal runaway
(IHPWB)
Defective PWB. Replace the IH PWB and check
for correct operation (see page 1-5-51).
Code Contents Causes
Check procedures/
corrective measures
Se
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vice Manual Y1
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