Ricoh G133 Service Manual page 244

SC Table
No. Type
1.
2.
No. Type
501 B Paper Tray 1 error
502 B Paper Tray 2 error
If one of these conditions occurs three consecutive times, the SC is
generated.
- -
1.
2.
G133
Details (Symptom, Possible Cause, Troubleshooting Procedures)
three times, the SC is generated and the machine defines that the
temperature is "23°C".
The thermistor output of the humidity sensor is not within the
prescribed range (0.01V to 2.4V). If this is detected consecutively
three times, the SC is generated and the machine detects that the
humidity is "50%".
Temperature and humidity sensor harness disconnected, loose,
defective
Temperature and humidity sensor defective
Check the connector and harness.
Replace the temperature/humidity sensor.
Details (Symptom, Possible Cause, Troubleshooting Procedures)
When the tray lift motor rotates counterclockwise, (if the upper limit
is not detected within 10 seconds), the machine asks the user to
reset the tray.
When the tray lift motor rotates clockwise, (if the upper limit is not
detected within 1.5 seconds), the machine asks the user to reset
the tray.
Disconnected or defective paper lift sensor
Disconnected or defective tray lift motor
Defective bottom plate lift mechanism
Too much paper in the tray
Defective IOB
Check if the paper is not loaded too much.
Check if the bottom plate smoothly moves up and down manually.
4-28 SM