Read Sharp MX-6240N / MX-7040N (serv.man26) Service Manual online
MX-7040N TROUBLESHOOTING 7 – 17
E7-27
LSU LD driver trouble (Y)
E7-28
LSU - PCU connection error
E7-29
LSU ASIC frequency error
E7-42
Image data trouble (Scanner
expansion PWB (ACRE) ASIC)
E7-46
Image data decode error (Scanner
expansion PWB (ACRE) ASIC)
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 and the LSU control PWB.
Check the harness and the connector between the LD
PWB and the LSU control PWB.
Replace the LD PWB and the LSU control PWB.
Trouble content
Detail
PCU
Cause
Communication error between the CPU in the PCU
PWB and the LSU control ASIC.
Improper connection of the communication connector
between the PCU PWB and the LSU control PWB
(interface PWB).
Harness trouble between the PCU PWB and the LSU
control PWB (interface PWB)
PCU PWB trouble.
LSU control PWB trouble.
LSU trouble.
PWB and the LSU control ASIC.
Improper connection of the communication connector
between the PCU PWB and the LSU control PWB
(interface PWB).
Harness trouble between the PCU PWB and the LSU
control PWB (interface PWB)
PCU PWB trouble.
LSU control PWB trouble.
LSU trouble.
Check & Remedy
Check connection of the connector and the harness
between the PCU PWB and the LSU control PWB.
Replace the LSU control PWB.
Replace the PCU PWB.
Replace the LSU.
between the PCU PWB and the LSU control PWB.
Replace the LSU control PWB.
Replace the PCU PWB.
Replace the LSU.
Trouble content
Detail
PCU
Cause
Oscillation abnormality of the external oscillator used
in the LSU ASIC.
LSU ASIC abnormality on the LSU control PWB.
in the LSU ASIC.
LSU ASIC abnormality on the LSU control PWB.
Check & Remedy
Replace the LSU control PWB.
Trouble content
Detail
MFP
Cause
An image data error occurs.
An image data send error occurs.
Scanner expansion PWB (ACRE) connection trouble.
Scanner expansion PWB (ACRE) trouble.
MFPC PWB trouble.
An image data send error occurs.
Scanner expansion PWB (ACRE) connection trouble.
Scanner expansion PWB (ACRE) trouble.
MFPC PWB trouble.
Check & Remedy
Check connection of the scanner expansion PWB
(ACRE).
Check the scanner expansion PWB (ACRE), and
replace if necessary.
Check the MFPC PWB, and replace if necessary.
(ACRE).
Check the scanner expansion PWB (ACRE), and
replace if necessary.
Check the MFPC PWB, and replace if necessary.
Trouble content
Detail
MFP
Cause
A decode error occurs while high compression PDF
images are made. (garbled data)
Scanner expansion PWB (ACRE) connection trouble.
Scanner expansion PWB (ACRE) trouble.
MFPC PWB trouble.
images are made. (garbled data)
Scanner expansion PWB (ACRE) connection trouble.
Scanner expansion PWB (ACRE) trouble.
MFPC PWB trouble.
Check & Remedy
Check connection of the scanner expansion PWB
(ACRE).
Check the scanner expansion PWB (ACRE), and
replace if necessary.
Check the MFPC PWB, and replace if necessary.
(ACRE).
Check the scanner expansion PWB (ACRE), and
replace if necessary.
Check the MFPC PWB, and replace if necessary.
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