MX-M950, MX-MM1100 (serv.man39). Section 8 Self Diagnostics Trouble Codes - Sharp Copying Equipment Service Manual (repair manual). Page 10

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MX-M1100 SELF DIAG AND TROUBLE CODE  8 – 10
 
E7-06
Decode error trouble
 
E7-08
W-ICU memory specification error 
(ICU1)
 
E7-09
W-ICU memory combination error 
(ICU1)
 
E7-10
Shading trouble (Black correction)
 
E7-11
Shading trouble (White correction)
 
E7-14
CCD-ASIC abnormality (OC)
 
E7-18
W-ICU memory specification error 
(ICU2)
 
E7-19
W-ICU memory combination error 
(ICU2)
 
E7-20
LSU BD detection trouble
 
E7-21
LSU LD deterioration trouble
Detail
A decode error occurs when making images
Section
ICU
Cause
Compression data abnormality.
HDD installation abnormality.
Data garble in image compression / transfer.
MPFC PWB abnormality, or W-ICU PWB abnormality.
Check & 
Remedy
Check installation of the PWB. (PCI bus)
If the job when the error occurred was FAX, 
check installation of the FAX PWB. 
For the other cases, check installation of the MFPC 
PWB, W-ICU PWB, and the HDD PWB.
Replace the W-ICU PWB.
Replace the MFPC PWB. 
Detail
A DIMM of a different specification is detected on the 
W-ICU memory slot
Section
ICU
Cause
A DIMM of a different specification is installed to the W-
ICU memory slot. 
(Support memory: ROW=13bit, Column=10bit)
Check & 
Remedy
Check the DIMM which is installed. 
Detail
Combination error of the W-ICU memory slot installation
Section
ICU
Cause
A DIMM installed to the default slot is not 512MB. 
A DIMM installed to the expansion slot is not 256MB.
Check & 
Remedy
Check combination of DIMM installation. 
Detail
CCD black scan level abnormality when the copy lamp 
is turned off
Section
SCU
Cause
Installation failure of the harness to the CCD unit
CCD unit abnormality, SCU PWB abnormality.
Check & 
Remedy
Check installation of the harnesses to the CCD unit.
Check the CCD unit. Check the SCU PWB. 
Detail
CCD white reference plate scan level abnormality when 
the copy lamp is turned on
Section
SCU
Cause
Installation failure of the harness to the CCD unit
Dirt on the mirror, lens, and the reference white plate.
Copy lamp lighting abnormality.
CCD unit abnormality, SCU PWB abnormality.
Check & 
Remedy
Check installation of the harnesses to the CCD unit.
Check installation of the harnesses to the copy lamp 
unit. 
Clean the mirror, the lens, and the reference white plate. 
Check the CCD unit and the SCU PWB. 
Detail
The written register value cannot be read
Section
SCU
Cause
SCU PWB abnormality
Check & 
Remedy
Check the SCU PWB.
Detail
DIMM of different specification is detected in the W-ICU 
memory slot
Section
ICU
Cause
DIMM of different specification is inserted to the W-ICU 
memory slot. 
(Support memory: ROW=13bit, Colum=10bit part)
Check & 
Remedy
Check the installed DIMM. 
Detail
Combination error of the W-ICU memory slot installation
Section
ICU
Cause
DIMM of other than 256MB is inserted into the default 
slot. 
DIMM of other than 512MB is inserted to the expansion 
slot. 
Check & 
Remedy
Check the installation combination of DIMM.
Detail
The BD signal of the LSU is not detected
Section
PCU
Cause
Optical axis shift.
BK laser deterioration, power down.
BD PWB abnormality.
Disconnection or improper insertion of the harness and 
the connector between the LD / BD PWB and the LSU 
control PWB.
Check & 
Remedy
Check the LSU operation with Sim. 61-1.
Check connection of PWB and the harness in the LSU.
Replace the LSUcnt, BD PWB. 
If the trouble is not canceled, replace the LSU. 
Detail
Laser is not lighted normally.
Section
PCU
Cause
Laser deterioration, power fall.
Disconnection or insertion failure of the harness or 
connector between the LD PWB and the LSUcnt PWB.
Check & 
Remedy
Use Sim. 61-1 to check the operation of the LSU.
Check connection of the harness in each PWB in the 
LSU.
Replace the LSUcnt PWB.
If the trouble is not canceled, replace the LSU. 
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