Causes: The PTC unit is not installed, or the eater line conduction trouble. PCU PWB trouble. Connector, harness connection trouble.
Remedy: Replace the PTC unit. Replace the PCU PWB. Check connection of the connector and the harness. NOTE: When the PTC unit is broken down and repair cannot be made because of no replacement part: To use the machine continuously, make the setting to ignore the PTC trouble, and the machine can be operated tentatively. Set the engine soft SW8-3 in SIM55-1 to "1". This setting disables the PTC output, the heater control, and the error detection. After completion of repair, set the engine soft SW8-3 in SIM55-1 to "0".
Remedy: Replace the PTC unit. Replace the PCU PWB. Check connection of the connector and the harness. NOTE: When the PTC unit is broken down and repair cannot be made because of no replacement part: To use the machine continuously, make the setting to ignore the PTC trouble, and the machine can be operated tentatively. Set the engine soft SW8-3 in SIM55-1 to "1". This setting disables the PTC output, the heater control, and the error detection. After completion of repair, set the engine soft SW8-3 in SIM55-1 to "0".
Code: C4-10
Description: PTC no control
Causes: The engine soft SW8-3 in SIM55-1 is set to "1". The PTC control is not executed. (The PTC does not operate.) When the engine soft SW8-3 in SIM55-1 is set to "1", the PTC output, the heater control, and the error detection are disabled. When this setting is made in case of a PTC unit trouble, the PTC function is disabled regardless of the PTC trouble and printing operation can be performed.
Remedy: Set the engine soft SW8-3 in SIM55-1 to "0". (The mode returns to the normal PTC control mode.)
Code: C4-20
Description: Primary transfer output trouble
Causes: The primary transfer unit is not installed properly./ Trouble. High voltage 1TC PWB trouble. High voltage MC PWB trouble. PCU PWB trouble. Connector, harness connection trouble.
Remedy: Replace the primary transfer unit. Check disconnection of the high voltage 1TC PWB connector./Replace. Check disconnection of the high voltage MC PWB connector./Replace. Replace the PCU PWB.
Code: E6-10
Description: Shading error (Black correction)
Causes: Installation error of the CCD unit harness. CCD unit trouble. DSPF PWB trouble.
Remedy: Check the installing state of the harness to the CCD unit. Check the CCD unit. Check the DSPF PWB.
Code: E6-11
Description: Shading error (White correction)
Causes: Installation error of the CCD unit harness. Copy lamp lighting trouble. Dirt on the mirror, the lens, or the reference white plate. CCD unit trouble. DSPF PWB trouble. Shading SIM not executed / Shading ROM abnormality.
Remedy: Check the installing state of the harness the CCD unit. Check the installing state of the harness to the copy lamp unit. Clean the mirror, the lens, or the reference white plate. Check the CCD unit. Check the DSPF PWB.