Ricoh SP 8400DN Field Service Manual page 1283

SC No. Type
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SC551- A NC Sensor (End) Short-circuit
03
AD value: 0-13 (FB voltage: 0.000V-0.041V) is detected for specified seconds continuously.
Detection period: 100 ms, detection frequency: 10 times or more.
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SC No. Type
SC552- A Fusing Thermopile (Edge) Does Not Reload
02
When the thermopile (edge) does not reach a predetermined temperature for specified
seconds consecutively.
SC552- A Fusing Thermopile (Edge) Does Not Reload
03
Heating edge reload permission temperature not reached after heater 1 ON for specified
seconds.
SC552- C Fusing Thermopile (Edge) Does Not Reload (Low Voltage)
05
When the thermopile (edge) does not reach a predetermined temperature for specified
seconds consecutively.
SC552- C Fusing Thermopile (Edge) Does Not Reload (Low Voltage)
06
When the thermopile (edge) does not reach the permission temperature of heat edge
reloading for specified seconds continuously.
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Error Name/Error Condition/Major Cause/Solution
Connector disconnected
Reconnect the connectors between the fusing unit and the BCU.
Reset the NC sensor.
Replace the harness between the fusing unit and the BCU.
Replace the BCU.
Harness broken
Connector disconnected
Reconnect the connectors between the fusing unit and the BCU.
Reset the NC sensor.
Replace the harness between the fusing unit and the BCU.
Replace the BCU.
Error Name/Error Condition/Major Cause/Solution
Thermopile (edge) lens dirt
Thermopile (edge) installed incorrectly
Thermopile modification
Outside input voltage guarantee
After excessive temperature rise prevention unit operation
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.
6.Troubleshooting
545