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June 30, 1998
SC370-01: Potential sensor error 1
Definition- [D]
When calibrating the drum potential sensor at the process control initial setting,
the drum potential sensor output voltage is out of specification.
- Possible causes -
• Potential sensor defective
• Poor connection between the potential sensor and the I/O board (IOB)
• IOB defective
• Poor connection between the drum unit and the I/O board (IOB)
• Development power pack defective
SC370-02: Potential sensor error 2
Definition- [D]
When calibrating the drum potential sensor at the process control initial setting,
the rate of change of drum potential sensor output with voltage on the drum is
out of specification.
- Possible causes -
• Potential sensor defective
• Poor connection between the potential sensor and the I/O board (IOB)
• IOB defective
• Poor connection between the drum unit and the I/O board (IOB)
• Development power pack defective
SC370-03: Potential sensor error 3
Definition- [D]
When adjusting V
–1000V is applied to the charge grid, the drum potential sensor should detect a
V
of about -900 V, but detects that V
D
- Possible causes -
• Potential sensor defective
• Poor connection between the potential sensor and the I/O board (IOB)
• IOB defective
• Poor connection between the drum unit and the I/O board (IOB)
• Development power pack defective
• Dirty or worn charge corona wire
for the unexposed drum during process control initial setting,
G
SERVICE CALL CONDITIONS
is more than -970 V.
D
7-9
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