315 C
Potential sensor calibration error 5
During drum potential sensor calibration,
when –100V is applied to the drum, the
output value is out of the prescribed range.
• Potential sensor defective
• Potential sensor harness disconnected
• Potential sensor connector defective or
disconnected
• IOB defective
• OPC connector defective
• Development power pack defective
316 C
Potential sensor calibration error 6
During drum potential sensor calibration,
when –800V is applied to the drum, the
output value is out of the prescribed range.
• Potential sensor defective
• Potential sensor harness disconnected
• Potential sensor connector defective or
disconnected
• IOB defective
• OPC connector defective
• Development power pack defective
317 C
Potential sensor calibration error 7
During drum potential sensor calibration,
when VL is adjusted, the pattern surface
potential VL pattern is not within range 0V
~ –400V. (VL is the potential after expos-
ing a white pattern.)
• Potential sensor defective
• Potential sensor harness disconnected
• Potential sensor connector defective or
disconnected
• IOB defective
• OPC connector defective
• Charge corona power pack defective
• Development power pack defective
340 C
TD sensor output error
TD sensor output voltage (Vt), measured
during each copy cycle, is detected 10
times at one of the following levels:
Vt = 0.5 volts or lower
• TD sensor defective
• TD sensor harness disconnected
• TD sensor connector disconnected or
defective
Service Mode
251
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