Read Sharp MX-6240N / MX-7040N (serv.man26) Service Manual online
MX-7040N TROUBLESHOOTING 7 – 16
E7-10
Shading error (Black correction)
E7-11
Shading error (White correction)
E7-14
CCD-ASIC error
E7-20
LSU laser detection and deterioration
error (K)
E7-21
LSU laser deterioration error (C)
E7-22
LSU laser deterioration error (M)
E7-23
LSU laser deterioration error (Y)
E7-24
LSU LD driver trouble (K)
E7-25
LSU LD driver trouble (C)
E7-26
LSU LD driver trouble (M)
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.
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.
Check the CCD unit.
Check the SCU PWB.
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.
Scanner lamp drive PWB trouble
CCD unit abnormality.
SCU PWB abnormality.
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.
Scanner lamp drive PWB 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.
Check or replace the scanner lamp.
Check or replace the scanner lamp drive PWB.
Clean or replace the mirror, the lens, and the
reference white board.
Check or replace the CCD unit.
Check or replace the SCU PWB.
Check connection of the harness to the scanner lamp
unit.
Check or replace the scanner lamp.
Check or replace the scanner lamp drive PWB.
Clean or replace the mirror, the lens, and the
reference white board.
Check or replace the CCD unit.
Check or replace the SCU PWB.
Trouble content
Detail
SCU
Cause
SCU PWB trouble.
Check & Remedy
Check the SCU PWB.
Replace the SCU PWB.
Replace the SCU PWB.
Trouble content
Detail
PCU
Cause
Laser optical axis misalignment
Reduced laser power, lighting error, laser diode
trouble.
LSU harness, connector trouble
LSU trouble
Reduced laser power, lighting error, laser diode
trouble.
LSU harness, connector trouble
LSU trouble
Check & Remedy
Use SIM61-1 to check the operation of the LSU.
Check or replace the LSU control PWB.
Check connection of the LSU harness.
Replace the LSU.
Check or replace the LSU control PWB.
Check connection of the LSU harness.
Replace the LSU.
Trouble content
Detail
PCU
Cause
Reduced laser power, lighting error, laser diode
trouble.
LSU harness, connector trouble
LSU trouble
trouble.
LSU harness, connector trouble
LSU trouble
Check & Remedy
Use SIM61-1 to check the operation of the LSU.
Check or replace the LSU control PWB.
Check connection of the LSU harness.
Replace the LSU.
Check or replace the LSU control PWB.
Check connection of the LSU harness.
Replace the LSU.
Trouble content
Detail
PCU
Cause
Reduced laser power, lighting error, laser diode
trouble.
LSU harness, connector trouble
LSU trouble
trouble.
LSU harness, connector trouble
LSU trouble
Check & Remedy
Use SIM61-1 to check the operation of the LSU.
Check or replace the LSU control PWB.
Check connection of the LSU harness.
Replace the LSU.
Check or replace the LSU control PWB.
Check connection of the LSU harness.
Replace the LSU.
Trouble content
Detail
PCU
Cause
Reduced laser power, lighting error, laser diode
trouble.
LSU harness, connector trouble
LSU trouble
trouble.
LSU harness, connector trouble
LSU trouble
Check & Remedy
Use SIM61-1 to check the operation of the LSU.
Check or replace the LSU control PWB.
Check connection of the LSU harness.
Replace the LSU.
Check or replace the LSU control PWB.
Check connection of the LSU harness.
Replace the LSU.
Trouble content
The LSU LD is lighted, the initialization process of the
LD driver is not performed normally.
LD driver is not performed normally.
Detail
PCU
Cause
Disconnection or improper connection of the harness
and the connector between the LD PWB and the LSU
control PWB.
LD PWB/LSU control PWB trouble.
and the connector between the LD PWB and the LSU
control PWB.
LD PWB/LSU control PWB trouble.
Check & Remedy
Use SIM61-01 to check the operations of the LSU.
Check the harness and the connector between the LD
PWB and the LSU control PWB.
Replace the LD PWB/LSU control PWB.
Check the harness and the connector between the LD
PWB and the LSU control PWB.
Replace the LD PWB/LSU control PWB.
Trouble content
The LSU LD is lighted, the initialization process of the
LD driver is not performed normally.
LD driver is not performed normally.
Detail
PCU
Cause
Disconnection or improper connection of the harness
and the connector between the LD PWB and the LSU
control PWB.
LD PWB/LSU control PWB trouble.
and the connector between the LD PWB and the LSU
control PWB.
LD PWB/LSU control PWB trouble.
Check & Remedy
Use SIM61-01 to check the operations of the LSU.
Check the harness and the connector between the LD
PWB and the LSU control PWB.
Replace the LD PWB/LSU control PWB.
Check the harness and the connector between the LD
PWB and the LSU control PWB.
Replace the LD PWB/LSU control PWB.
Trouble content
The LSU LD is lighted, the initialization process of the
LD driver is not performed normally.
LD driver is not performed normally.
Detail
PCU
Cause
Disconnection or improper connection of the harness
and the connector between the LD PWB and the LSU
control PWB.
LD PWB/LSU control PWB trouble.
and the connector between the LD PWB and the LSU
control PWB.
LD PWB/LSU control PWB trouble.
Check & Remedy
Use SIM61-01 to check the operations of the LSU.
Check the harness and the connector between the LD
PWB and the LSU control PWB.
Replace the LD PWB/LSU control PWB.
Check the harness and the connector between the LD
PWB and the LSU control PWB.
Replace the LD PWB/LSU control PWB.
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