Olivetti d-Copia 600 Service Manual page 193

Code
C6050 Fuser thermistor abnormal tempera-
ture detection
• During copying, the temperature at the
heat roller lower than 120
detected continuously for 5 s.
C6400 Zero-cross signal error
• The main PWB does not detect the
zero-crossing signal (Z CROSS SIG)
for 5 s.
C7200 Broken internal thermistor wire
• The thermistor output value is 4.5 V or
more.
C7210 Short-circuited internal thermistor
• The thermistor input value is 0.5 V or
less.
C7300 Toner hopper problem
• Toner level is not detected when toner
empty is detected.
C7800 Broken external thermistor wire
• The thermistor output value is 4.5 V or
more.
Y104350-7
Contents
° °
C/248 F is
Causes Check procedures/corrective measures
Installation defec- Check the mounting state of the fuser ther-
tiveness on fuser mistor M and S. If any problem is found,
thermistor M and repair it.
S.
Operation on fuser Check for continuity. If none, replace the
thermostat. fuser thermostat.
Installation defec- Check the mounting state of the fuser ther-
tiveness on fuser mistor L, M and S. If any problem is found,
heater L, M or S. repair it.
Broken fuser Check for continuity. If none, replace the
heater L, M and S fuser heater L, M and S (see page 1-6-76).
wire.
Poor contact in the Check the connection of connectors YC11
connector termi- on the main PWB and YC6 on the DC power
nals. source PWB, and the continuity across the
connector terminals. Repair or replace if
necessary.
Defective DC Check if the zero-crossing signal is output
power source from YC6-3 on the DC power source PWB.
PWB. If not, replace the DC power source PCB.
Defective main Replace the main PWB if C6400 is detected
PWB. while YC6-3 on the DC power source PWB
outputs the zero-crossing signal.
Poor contact in the Check the connection of connector YC23 on
connector termi- the engine PWB and the continuity across
nals. the connector terminals. Repair or replace if
necessary.
Defective develop- Replace the developing humidity sensor.
ing humidity sen-
sor.
Poor contact in the Check the connection of connector YC23 on
connector termi- the engine PWB and the continuity across
nals. the connector terminals. Repair or replace if
necessary.
Defective develop- Replace the developing humidity sensor.
ing humidity sen-
sor.
Defective toner Replace the toner level detection sensor.
level detection sen-
sor.
Poor contact in the Reinsert the connector. Also check for conti-
toner level detec- nuity within the connector cable. If none,
tion sensor con- remedy or replace the cable.
nector terminals.
Poor contact in the Check the connection of connector YC13 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.
Sevice Manual
Remarks
1-5-37