Code :

Code: U2-50
Description: HDD section individual data check sum error (MFP)
Causes: MFPcnt HDD individual data check sum error (One-touch, group, program, etc.)
Remedy: Case 1 Cause Write/read error to/from HDD Check and remedy 1) Turn OFF/ON the power to initialize the data related to the check sum error contents automatically. 2) Since the registered contents have been deleted, register them again. 3) If the trouble is not canceled, replace the HDD. Case 2 Cause Control circuit hang-up due to electrical noises Check and remedy Use SIM16 to cancel U2 trouble. Case 3 Cause MFPcnt PWB HDD access circuit trouble Check and remedy Replace the MFPcnt PWB.

Code: U2-80
Description: EEPROM read/write error (SCU detection)
Causes: 1) EEPROM version error 2) Write error to EEPROM
Remedy: Case 1 Cause EEPROM trouble, installation of EEPROM which is not initialized Check and remedy Check that EEPROM is properly set. Case 2 Cause SCU PWB EEPROM access circuit trouble Check and remedy To avoid deletion of the counter data/adjustment values, use the simulation to save the counter/ adjustment values. (If there is a printer option, execute SIM22-1 to save the counter data and the adjustment values.) Replace the SCU PWB. Use SIM16 to cancel the trouble.

Code: U2-81
Description: Adjustment value check sum error (SCU detection)
Causes: EEPROM (SCU) check sum error
Remedy: Case 1 Cause Control circuit hang-up due to electrical noises Check and remedy Use SIM16 to cancel U2 trouble. Case 2 Cause EEPROM trouble Check and remedy To avoid deletion of the counter data/adjustment values, use the simulation to save the counter/ adjustment values. (If there is a printer option, execute SIM22-1 to save the counter data and the adjustment values.) Replace the SCU PWB. Use SIM16 to cancel the trouble. Case 3 Cause SCU PWB EEPROM access circuit trouble Check and remedy Check that EEPROM is properly set.

Code: U2-90
Description: EEPROM read/write error (PCU detection)
Causes: EEPROM version error, write error to EEPROM
Remedy: Case 1 Cause EEPROM trouble, installation of EEPROM which is not initialized. Installation of 64KBit EEPROM Check and remedy Check that EEPROM is properly set. Check to insure that 256KBit EEPROM is installed. Case 2 Cause PCU PWB EEPROM access circuit trouble Check and remedy To avoid deletion of the counter data/adjustment values, use the simulation to save the counter/ adjustment values. (If there is a printer option, execute SIM22-1 to save the counter data and the adjustment values.) Replace the PCU PWB. Use SIM16 to cancel the trouble.

Code: U2-91
Description: Adjustment value check sum error (PCU detection)
Causes: EEPROM (PCU) check sum error
Remedy: Case 1 Cause Control circuit hang-up due to electrical noises Check and remedy Use SIM16 to cancel the trouble. Case 2 Cause EEPROM trouble. Check and remedy Check that EEPROM is properly set. Use SIM16 to cancel the trouble. Case 3 Cause PCU PWB EEPROM access circuit trouble Check and remedy To avoid deletion of the counter data/adjustment values, use the simulation to save the counter/ adjustment values. (If there is a printer option, execute SIM22-1 to save the counter data and the adjustment values.) Replace the PCU PWB. Use SIM16 to cancel the trouble.

Code: U5-00
Description: SPF communication trouble
Causes: Communication error between the SCU and the DSPF, communication line test error after turning on the power or canceling the exclusive simulation
Remedy: Case 1 Cause Malfunction due to electrical noises Check and remedy Cancel the trouble by turning OFF/ON. Case 2 Cause Connector and harness connection trouble or disconnection Check and remedy Check the connector and the harness of the communication line. Case 3 Cause Control (SCU) PWB trouble. DSPF PWB trouble Check and remedy Replace the control (SCU) PWB. Replace the DSPF PWB.

Code: U5-16
Description: SPF fan motor trouble
Causes: Fan motor trouble, harness of the fan motor related, circuit trouble
Remedy: Use SIM2-3 to check the operation. Check harness, connector and fan motor related circuit.

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