Sc6Xxx - Ricoh B286 Service Manual

563 A Pressure roller end thermistor error 2
During the hot roller
temperature control
sequence, the end
thermistor on the pressure
roller returned a digital
reading of less than 0.2V.

4.2.6 SC6XXX

628 D Fan fold unit communication error 1
The machine failed to detect within 100
ms a response to a data frame sent to
the fan fold unit. Three consecutive
retries failed, resulting in a timeout.
B Key/card counter device error 1
After 1 data frame is sent to the device, an
632
ACK signal is not received within 100 ms,
and is not received after 3 retries.
Key/card counter device error 2
633 B
During communication with the device,
the MCU received a break (Low) signal.
SM
! Pressure roller end thermistor connector
loose
! Pressure roller end thermistor short circuit,
defective
! MCU defective
! Cable harness between the
main machine and fan fold unit
broken or defective
! Connector loose, disconnected,
or defective
! Serial line from the device
to the main machine is
unstable, disconnected, or
defective.
! Serial line from the device to
the main machine is unstable,
disconnected, or defective
4-11
SC Code Descriptions
B286/B289