Service manual

SC558: Zero cross signal abnormal
Type: 1
- Description -
The main control board notifies the SCU when the number of zero
cross signals generated within a certain period of time does not reach
a predetermined number.
- Detection Timing -
At all times
- Possible Causes -
• Main control board
SP-Log: 7-402-5
SC600: Communication error between the SCU and operation panel
boards
Type: 3
- Description -
The input value used by the SCU to send the test signal to the
operation panel does not match the expected value.
- Detection Timing -
When the power switch is turned on
When the operation panel is used
- Possible Causes -
• SCU (System Control Unit)
SP-Log: 7-402-6
SC601: Communication error between SCU and scanner IPU boards
Type: 3
- Description -
The SCU detects a communication error in the scanner module during
communication with the scanner IPU board based on the SCSI
connection protocol.
- Detection Timing -
At all times
- Possible Causes -
• Scanner IPU
• SCU (System Control Unit)
• SCSI cable
SP-Log: 7-402-6
SERVICE CALL CONDITIONS
A166/A187/A189 6-22 SM
CÓPIA NÃO CONTROLADA
CÓPIA NÃO CONTROLADA