Olivetti d-Copia 1801MF Plus, Service Manual, Page: 203 / 492

2NC/2NF/2NG/2NN/3P7/3P8/3P9
1-4-31
6230 Broken fuser thermistor 1
wire (Edge)
Input from fuser thermistor 1
is 1012 or more (A/D value)
continuously for 5 s.
Input from fuser thermistor 1
is1012 (A/D value) or more
whenthe temperature at the
fuser thermistor 2 is 70°C/
158°F or more.
Fuser unit 1. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
Fuser unit and main/engine PWB
(YC14)
2. If the wiring is disconnected, shorted or
grounded, replace the wiring.
3. Replace the Fuser unit and execute
U167 counter clear (see page 1-3-56).
Main/Engine PWB 1. Check the main/engine software and
upgrade to the latest, if necessary.
2. Replace the main/engine PWB (see
page 2-2-11).
6400
Zero-cross signal error
While fuser heater ON/OFF
control is performed, the zero-
cross signal is not input within
3 s.
Fuser unit 1. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
Power source PWB (CN2) and main/
engine PWB (YC14)
2. If the wiring is disconnected, shorted or
grounded, replace the wiring.
3. Replace the power source PWB.
Code Contents Related parts
Check procedures/
corrective measures