Ricoh D014 Service Manual page 949

1. Check after Power On
This check is performed only after the machine is powered on.
AC Current Adjustment.
The machine selects the current for optimum AC charge (Vpp). The optimum charge
depends on the ambient temperature and humidity. The optimum charge for each
temperature and humidity range is set with SP2204 (ACC Charge Correction).
Insufficient charge can cause white spotting, and too much charge can cause toner
film on the surface of the drum. This check ensures that the average value of Vpp after
20 samplings is Vpp > 2.8 kV.
Toner Agitation
Vsg detection. The ID sensor detects Vsg (reflectivity of the bare drum surface)
Transfer current adjustment.
2. Check Sensor Readings
The processes and analyzes the results of the sensor readings in the previous step.
Detect Vdhome
A charge of –700V is applied to the drum. The potential sensor detects the potential of
the drum and checks if the potential sensor, drum, and charge roller/corona unit are
functioning normally. If the charge is within the range –800V to –500V, the drum is
functioning normally.
Possible Errors at Potential Sensor Calibration
SC Codes
SC436~SC439
SP3821
SM
CÓPIA NÃO CONTROLADA
For More Details:
See "Process Control Troubleshooting" in "4.
Troubleshooting" in the Venus-C1 (B132/B200) Service
Manual.
15, 16, 17
6-45
CÓPIA NÃO CONTROLADA
Process Control
D014/D015/D078/D079