Description: Zero cross signal malfunction
Zero cross signals are not detected within 5 seconds after the main power switch is turned on, or are not detected within 1 second after operation begins.
Causes: • Power supply board defective
• BICU defective
Code: 559
Description: Jam error detected 3 times in succession
• The exit sensor and the duplex sensor detect a paper jam 3 times in succession
• This condition can occur when SP 1159 1 is set to ‘on’. The default is ‘off’.
Causes: Paper jams can occur for the following reasons.
• Dampness
• Paper curl
• Incorrect paper setting in the paper tray
• Stripper pawls coming apart
Code: 590
Description: Left exhaust fan motor error
The CPU detects an exhaust fan lock signal for more than 5 seconds.
Causes: • Loose connection of the exhaust fan motor
• Too much load on the motor drive
Code: 928
Description: Memory error
The machine detects a discrepancy in the write/read data during its write/read test (done at power off/on and at recovery from low power or night/off mode).
Causes: • Memory defective
• BICU defective
• Poor connection between BICU and memory
Code: 981
Description: NVRAM error
The machine detects a discrepancy in the NVRAM write/read data when attempting to save actual data to the NVRAM (i.e. during actual use).
Causes: • NVRAM defective
• Poor connection between BICU and NVRAM
• NVRAM is not connected
• BICU defective
Code: 982
Description: Localization error
The localization settings in the nonvolatile ROM and RAM are different (SP5807).
Causes: • First machine start after the NVRAM is replaced
• Incorrect localization setting
• NVRAM defective