Ricoh IM C300 Service Manual page 303

The causes of the failure may be as follows.
• The test pattern was not set correctly.
• A jam occurred at the time of reading.
The ACC test pattern is abnormal (e.g. a pattern is missing).
•
The reading position has deviated (4mm or more) due to skewing for example.
•
SM 4-69
ADF
D0CA/D0C9/D0C8/D0CB