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1.12 ACC Control
SC910: ACC Calculation Error (Letter Mode: Bk)
SC911: ACC Calculation Error (Letter Mode: C)
SC912: ACC Calculation Error (Letter Mode: M)
SC913: ACC Calculation Error (Letter Mode: Y)
SC914: ACC Calculation Error (Photo Mode: Bk)
SC915: ACC Calculation Error (Photo Mode: C)
SC916: ACC Calculation Error (Photo Mode: M)
SC917: ACC Calculation Error (Photo Mode: Y)
- Definition - [D]
Even if the test pattern has been scanned in, the CPU on the IPU could
not find the appropriate adjustment table to approximate the actual curve
to the target gamma curve.
- Possible Causes -
•
IPU defective
SC920: ACC not performed (internal error)
- Definition - [D]
Under any of the following conditions, the ACC will not performed.
1) Process Control self-check error, ID sensor error, Drum potential
sensor error, Potential control error.
2) When an SC occurs while the ACC test pattern is printed.
3) When the TD sensor output (Vt) value becomes lower than 2.5 ± 1.0 V.
- Possible Causes -
•
The actual printer gamma curve changed over a big range (caused by
process control self-check).
•
Main Control Board defective
A172/A199
6-28
SM
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