Code :

Code: E7-09
Description: Standard memory size/Expansion memory size error (MFP PWB)
Causes: A DIMM other than below is installed to the default throttle. • 40-sheet machine System memory: 1GB Local memory: 512MB • 31-sheet machine System memory: 512MB Local memory: 512MB DIMM trouble. Insufficient memory size.
Remedy: Replace the DIMM.

Code: E7-10
Description: Shading error (Black correction)
Causes: Abnormality in the CCD black scan level when the scanner lamp is turned OFF. Improper installation of the harness to the carriage unit/SCU PWB. Carriage unit abnormality. SCU PWB abnormality.
Remedy: Check connection of the harness to the carriage unit/SCU PWB. Check the carriage unit. Check the SCU PWB.

Code: E7-11
Description: Shading error (White correction)
Causes: Abnormality in the CCD white reference plate scan level when the scanner lamp is turned ON. Improper installation of the harness to the carriage unit/SCU PWB. Dirt on the mirror, lens, and the reference white plate. Scanner lamp lighting trouble. Carriage unit abnormality. SCU PWB abnormality.
Remedy: Check connection of the harness to the carriage unit/SCU PWB. Check connection of the harness to the scanner lamp unit. Clean the mirror, the lens, and the reference white plate. Check the carriage unit. Check the SCU PWB.

Code: E7-20
Description: LSU laser detection error
Causes: Optical axis shift. Reduced laser power, lighting error, laser diode trouble. BD PWB trouble. Harness and connector trouble between the LD/BD PWB and the LSU cnt PWB.
Remedy: Use SIM61-1 to check the operation of the LSU. Check the PWB and connection of the harness in the LSU. Replace the LSU.

Code: E7-21
Description: LSU LD deterioration trouble
Causes: Laser deterioration, power reduction Harness and connector trouble between the LD PWB and the LSU control PWB.
Remedy: Use SIM61-1 to check the operation of the LSU. Check the PWB and connection of the harness in the LSU. Replace the LSU control PWB.

Code: E7-28
Description: LSU-PCU connection error
Causes: Communication error between the CPU in the PCU PWB and the control ASIC. Improper connection of the communication connector between the PCU PWB and the LSU cnt PWB (interface PWB). Harness trouble between the PCU PWB and the LSU cnt PWB (interface PWB) PCU PWB or LSU cnt PWB (interface PWB) trouble
Remedy: Check connection of the connector and the harness between the PCU PWB and the LSU cnt PWB (interface PWB). Replace the LSU cnt PWB. Replace the PCU PWB.

Code: E7-29
Description: LSU ASIC frequency error
Causes: Oscillation abnormality of the external oscillator and the internal oscillating circuit used in the LSU ASIC. LSU ASIC abnormality on the LSU ASIC PWB.
Remedy: Replace the LSU cnt PWB.

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