Description: Counter check sum error
Counter check sum value stored in the EEPROM is abnormal.
Causes: EEPROM failure Control circuit hung up by noises MCU PWB EEPROM access circuit defect
Remedy: Check that the EEPROM is properly set. To prevent against loss of counter/adjustment values, record the values with simulation. U2 trouble cancel with SIM 16 MCU PWB replacement
Code: U2-12
Description: Adjustment value check sum error (EEPROM)
Adjustment value data area check sum error
Causes: EEPROM failure Control circuit hung up by noises MCU PWB EEPROM access circuit failure
Remedy: Check that the EEPROM is properly set. To prevent against loss of counter/adjustment values, record the values with simulation. U2 trouble cancel with SIM 16 MCU PWB replacement
Code: U3-29
Description: Mirror base home position error
Home position is not detected when starting mirror base shift.
Causes: Mirror unit defect Mirror home position sensor defect MCU PWB decfect Scanner wire disconnection
Remedy: Check the scanning operation with SIM 1-1.
Code: U9-00
Description: Operation control PWB communication trouble
Communication setup error, framing, parity, protocol error
Causes: Operation control PWB connector disconnection Operation control PWB MCU PWB harness failure
Remedy: Check the connectors and harness of the operation control PWB and the MCU PWB. Check grounding of the machine. Check the ROM of the operation control PWB.
Code: U9-80
Description: Operation control PWB communication trouble (Protocol)
Communication trouble between MCU and the operation control PWB (Protocol error)
Causes: Operation control PWB connector disconnection Operation control PWB MCU PWB harness failure
Remedy: Check the connectors and harness of the operation control PWB and the MCU PWB. Check grounding of the machine.
Code: U9-81
Description: Operation control PWB communication trouble (Parity)
Communication trouble between MCU and the operation control PWB (Parity error)
Causes: Operation control PWB connector disconnection Operation control PWB MCU PWB harness failure
Remedy: Check the connectors and harness of the operation control PWB and the MCU PWB. Check grounding of the machine.