Sc6Xxx - Ricoh Neptune-P1 Service Manual

4. Troubleshooting
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.

SC6XXX

628 D Fan fold unit communication error 1
4
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 ACK
632
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.
Key/card counter device error 3
634 B
The backup battery of the counter device RAM
is low.
Key/card counter device error 4
635 B
198
• 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
• RAM backup battery exhausted
• Counter device defective