Ricoh C275 Service Manual page 192

Service Call Conditions
No. Description/Definition
E-04 Thermal Head Overheat:
Temperature of the thermal head is
greater than 65°C when the Start key is
pressed.
E-06 Main Motor Lock:
The CPU cannot detect the master eject
position sensor (drum HP) signal within
5.0 seconds after the main motor turns on.
E-09 Thermal Head Thermistor Open:
The thermistor output voltage is over
2.925 volts.
E-10 Thermal Head Energy Pulse error:
The CPU detects an abnormal ID signal
from the thermal head energy control
pulse.
E-12 Pressure Plate error:
The pressure plate home position sensor
does not turn on within 6 seconds during
initialization.
Both the pressure plate home position and
pressure plate limit sensors turn on when
the main SW is turned on.
The pressure plate home position sensor
does not turn off when the pressure plate
limit sensor does not turn on within 4.5
seconds when compressing the ejected
master.
C275
Points to Check
Overheat (wait for the thermal
head to cool down)
Thermal head
Main motor drive
Main motor
Motor drive board
Master eject position sensor
Thermal head thermistor
Thermal head connector
Thermal head connector
Thermal head
MPU
Pressure plate drive
Pressure plate motor
Plate position sensors
Master eject error
3-2 SM Appendix