Description: Serial communication error Type: 1 - Description - This SC is displayed when a counter serial I/O error is detected on the optics fiber cable between the SCU and the main control board for a successive five times. - Detection Timing - Always
Causes: • SCU • Main control board • Fiber cable SP-Log: 7-402-6
Code: SC920
Description: SCU/RAM board abnormal Type: 2 - Description - The SCU executes the read/write test for the RAM board on the SCU and the read/write operation is not successfully done. This SC is not displayed just after the read/write test because the CPU enters the hold state. It is displayed after the power switch is turned off and on. - Detection Timing - When the power switch is turned on
Causes: • RAM board SP-Log: 7-402-9
Code: SC931
Description: Printer NV-RAM abnormal Type: 1 - Description - When the main control board detects that illegal NV-RAM data has been loaded from the SCU, it notifies the SCU of an anomaly. - Detection Timing - When the power switch is turned on
Causes: • RAM board (Battery) • Main control board SP-Log: 7-402-9
Code: SC990
Description: I/O control board 1 abnormal Type: 2 - Description - This SC is displayed when a serial/parallel I/O error is detected in the I/O control board 1 for a successive five times. - Detection Timing - Always
Causes: • I/O control board 1 • Corona unit setting error • Connector/harness • Main control board SP-Log: 7-402-9
Code: SC991
Description: I/O control board 2 abnormal Type: 2 - Description - This SC is displayed when a serial/parallel I/O error is detected in the I/O control board 2 for a successive five times. - Detection Timing - Always
Causes: • I/O control board 2 • Corona unit setting error • Connector/harness • Main control board SP-Log: 7-402-9