Gestetner B070 Service Manual page 327

SC310: Drum Potential Sensor Error 1
Definition [D]
During drum potential sensor calibration, the output voltages from the drum
potential sensor are not within specifications while –200V then –700V are applied
to the drum.
NOTE: After this SC is issued, the grid voltage changes to the value set with
SP2001-001 (Charge Corona Bias Adjustment) and LD power changes to
the value set with SP2103 (LD Power Adjustment).
Possible Causes
• Drum potential sensor defective
• Poor connection between the drum potential sensor and the BCU
• Drum potential sensor defective
• IOB defective
• Poor drum ground connection
• CBG power pack defective
SC311: Drum Potential Sensor Error 2
Definition [D]
When calibrating the drum potential sensor during process control initialization, the
rate of change of drum potential sensor output with voltage on the drum is out of
specification.
NOTE: After this SC is issued, the grid voltage changes to the value set with
SP2001-001 (Charge Corona Bias Adjustment) and LD power changes to
the value set with SP2103 (LD Power Adjustment).
Possible Causes
• Drum potential sensor defective
• Poor connection between the drum potential sensor and the BCU
• Drum potential sensor defective
• IOB defective
• Poor drum ground connection
• CBG power pack defective
SM
CÓPIA NÃO CONTROLADA
4-7
CÓPIA NÃO CONTROLADA
SERVICE CALL CONDITIONS
B070/B071