Sharp MX-4100N Service Manual page 295

E7-08 MFP memory compatibility error
(MFP PWB)
Trouble content
Detail MFP
Cause A DIMM of different specifications is installed to the
MFP memory slot.
DIMM trouble.
Check & Remedy Check the installed DIMM.
Replace the DIMM.
E7-09 Wrong memory size
(Std./Ext. memory) (MFP PWB)
Trouble content
Detail MFP
Cause A DIMM which is not 512MB is inserted into the
default slot.
DIMM trouble.
Insufficient memory size.
Check & Remedy Replace the DIMM.
E7-10 Shading error (Black correction)
Trouble content
Detail SCU
Cause Abnormality in the CCD black scan level when the
scanner lamp is turned OFF.
Improper installation of the harness to the CCD unit.
CCD unit abnormality.
SCU PWB abnormality.
Check & Remedy Check connection of the harness to the CCD unit.
Check the CCD unit.
Check the SCU PWB.
E7-11 Shading error (White correction)
Trouble content
Detail SCU
Cause Abnormality in the CCD white reference plate scan
level when the scanner lamp is turned ON.
Improper installation of the harness to the CCD unit.
Dirt on the mirror, lens, and the reference white plate.
Scanner lamp lighting trouble.
CCD unit abnormality.
SCU PWB abnormality.
Check & Remedy Check connection of the harness to the CCD unit.
Check connection of the harness to the scanner
lamp unit.
Clean the mirror, the lens, and the reference white
plate.
Check the CCD unit.
Check the SCU PWB.
E7-14 CCD-ASIC error
Trouble content
Detail SCU
Cause SCU PWB trouble.
Check & Remedy Check the SCU PWB.
Replace the SCU PWB.
MX-5001N SELF DIAG AND TROUBLE CODE 7 – 9
E7-20 LSU laser detection error (K)
Trouble content
Detail PCU
Cause 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.
Check & 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.
E7-21 LSU laser detection error (C)
Trouble content
Detail PCU
Cause Reduced laser power, lighting error, laser diode
trouble.
Harness and connector trouble between the LD PWB
and the LSU cnt PWB.
Check & 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.
E7-22 LSU laser detection error (M)
Trouble content
Detail PCU
Cause Reduced laser power, lighting error, laser diode
trouble.
Harness and connector trouble between the LD PWB
and the LSU cnt PWB.
Check & 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.
E7-23 LSU laser detection error (Y)
Trouble content
Detail PCU
Cause Reduced laser power, lighting error, laser diode
trouble.
Harness and connector trouble between the LD PWB
and the LSU cnt PWB.
Check & 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.