Ricoh SP 8400DN Field Service Manual page 1286

6.Troubleshooting
SC No. Type
•
•
SC No. Type
SC555- A Fusing Edge Heater Continuously Heat
01
SC555- C Fusing Edge Heater Continuously Heat (Low Voltage)
05
After waiting for full power for more than specified seconds continuously, not detected for
specified seconds.
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
SC No. Type
SC557-00 C
548
Error Name/Error Condition/Major Cause/Solution
the BCU, connectors connected to the fusing unit
Replace the BCU board.
Turn the power off/on.
Error Name/Error Condition/Major Cause/Solution
Definition of heater full power
Continuously heating rate set point (maximum heating rate)
Measurement start point
After reload (after heater extinguished, after rotation complete) below the standby
temperature (target temperature), measurement starts after a heater heat-up request is
issued.
Measurement stop condition
Rotation started due to a print signal during measurement or other
Maximum heat-up Duty (SP interlinked value) 0% is excluded
Thermopile (edge) lens dirt
Thermopile (edge) installed incorrectly
Thermistor deformation
Heater disconnection
After excess temperature rise prevention unit operation
Outside input voltage guarantee
Remove the jammed paper in the fusing unit.
Check and replace the thermopile (edge).
Check the power supply voltage and reconnect the cable to the outlet.
Replace the thermostat.
Replace the BCU.
Error Name/Error Condition/Major Cause/Solution
Zero Cross Frequency Exceeded
In the event of an error
Frequency instability of commercial power line/Noise
-